fs/ksmbd/smb2pdu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
   4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
   5  */
   6
   7 #include <linux/inetdevice.h>
   8 #include <net/addrconf.h>
   9 #include <linux/syscalls.h>
  10 #include <linux/namei.h>
  11 #include <linux/statfs.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/falloc.h>
  14 #include <linux/mount.h>
  15
  16 #include "glob.h"
  17 #include "smbfsctl.h"
  18 #include "oplock.h"
  19 #include "smbacl.h"
  20
  21 #include "auth.h"
  22 #include "asn1.h"
  23 #include "connection.h"
  24 #include "transport_ipc.h"
  25 #include "transport_rdma.h"
  26 #include "vfs.h"
  27 #include "vfs_cache.h"
  28 #include "misc.h"
  29
  30 #include "server.h"
  31 #include "smb_common.h"
  32 #include "smbstatus.h"
  33 #include "ksmbd_work.h"
  34 #include "mgmt/user_config.h"
  35 #include "mgmt/share_config.h"
  36 #include "mgmt/tree_connect.h"
  37 #include "mgmt/user_session.h"
  38 #include "mgmt/ksmbd_ida.h"
  39 #include "ndr.h"
  40
  41 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
  42 {
  43         if (work->next_smb2_rcv_hdr_off) {
  44                 *req = ksmbd_req_buf_next(work);
  45                 *rsp = ksmbd_resp_buf_next(work);
  46         } else {
  47                 *req = smb2_get_msg(work->request_buf);
  48                 *rsp = smb2_get_msg(work->response_buf);
  49         }
  50 }
  51
  52 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
  53
  54 /**
  55  * check_session_id() - check for valid session id in smb header
  56  * @conn:       connection instance
  57  * @id:         session id from smb header
  58  *
  59  * Return:      1 if valid session id, otherwise 0
  60  */
  61 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
  62 {
  63         struct ksmbd_session *sess;
  64
  65         if (id == 0 || id == -1)
  66                 return false;
  67
  68         sess = ksmbd_session_lookup_all(conn, id);
  69         if (sess)
  70                 return true;
  71         pr_err("Invalid user session id: %llu\n", id);
  72         return false;
  73 }
  74
  75 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
  76 {
  77         struct channel *chann;
  78
  79         list_for_each_entry(chann, &sess->ksmbd_chann_list, chann_list) {
  80                 if (chann->conn == conn)
  81                         return chann;
  82         }
  83
  84         return NULL;
  85 }
  86
  87 /**
  88  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
  89  * @work:       smb work
  90  *
  91  * Return:      0 if there is a tree connection matched or these are
  92  *              skipable commands, otherwise error
  93  */
  94 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
  95 {
  96         struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
  97         unsigned int cmd = le16_to_cpu(req_hdr->Command);
  98         int tree_id;
  99
 100         work->tcon = NULL;
 101         if (cmd == SMB2_TREE_CONNECT_HE ||
 102             cmd ==  SMB2_CANCEL_HE ||
 103             cmd ==  SMB2_LOGOFF_HE) {
 104                 ksmbd_debug(SMB, "skip to check tree connect request\n");
 105                 return 0;
 106         }
 107
 108         if (xa_empty(&work->sess->tree_conns)) {
 109                 ksmbd_debug(SMB, "NO tree connected\n");
 110                 return -ENOENT;
 111         }
 112
 113         tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
 114         work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
 115         if (!work->tcon) {
 116                 pr_err("Invalid tid %d\n", tree_id);
 117                 return -EINVAL;
 118         }
 119
 120         return 1;
 121 }
 122
 123 /**
 124  * smb2_set_err_rsp() - set error response code on smb response
 125  * @work:       smb work containing response buffer
 126  */
 127 void smb2_set_err_rsp(struct ksmbd_work *work)
 128 {
 129         struct smb2_err_rsp *err_rsp;
 130
 131         if (work->next_smb2_rcv_hdr_off)
 132                 err_rsp = ksmbd_resp_buf_next(work);
 133         else
 134                 err_rsp = smb2_get_msg(work->response_buf);
 135
 136         if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
 137                 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
 138                 err_rsp->ErrorContextCount = 0;
 139                 err_rsp->Reserved = 0;
 140                 err_rsp->ByteCount = 0;
 141                 err_rsp->ErrorData[0] = 0;
 142                 inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2);
 143         }
 144 }
 145
 146 /**
 147  * is_smb2_neg_cmd() - is it smb2 negotiation command
 148  * @work:       smb work containing smb header
 149  *
 150  * Return:      true if smb2 negotiation command, otherwise false
 151  */
 152 bool is_smb2_neg_cmd(struct ksmbd_work *work)
 153 {
 154         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 155
 156         /* is it SMB2 header ? */
 157         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 158                 return false;
 159
 160         /* make sure it is request not response message */
 161         if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
 162                 return false;
 163
 164         if (hdr->Command != SMB2_NEGOTIATE)
 165                 return false;
 166
 167         return true;
 168 }
 169
 170 /**
 171  * is_smb2_rsp() - is it smb2 response
 172  * @work:       smb work containing smb response buffer
 173  *
 174  * Return:      true if smb2 response, otherwise false
 175  */
 176 bool is_smb2_rsp(struct ksmbd_work *work)
 177 {
 178         struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
 179
 180         /* is it SMB2 header ? */
 181         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 182                 return false;
 183
 184         /* make sure it is response not request message */
 185         if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
 186                 return false;
 187
 188         return true;
 189 }
 190
 191 /**
 192  * get_smb2_cmd_val() - get smb command code from smb header
 193  * @work:       smb work containing smb request buffer
 194  *
 195  * Return:      smb2 request command value
 196  */
 197 u16 get_smb2_cmd_val(struct ksmbd_work *work)
 198 {
 199         struct smb2_hdr *rcv_hdr;
 200
 201         if (work->next_smb2_rcv_hdr_off)
 202                 rcv_hdr = ksmbd_req_buf_next(work);
 203         else
 204                 rcv_hdr = smb2_get_msg(work->request_buf);
 205         return le16_to_cpu(rcv_hdr->Command);
 206 }
 207
 208 /**
 209  * set_smb2_rsp_status() - set error response code on smb2 header
 210  * @work:       smb work containing response buffer
 211  * @err:        error response code
 212  */
 213 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
 214 {
 215         struct smb2_hdr *rsp_hdr;
 216
 217         if (work->next_smb2_rcv_hdr_off)
 218                 rsp_hdr = ksmbd_resp_buf_next(work);
 219         else
 220                 rsp_hdr = smb2_get_msg(work->response_buf);
 221         rsp_hdr->Status = err;
 222         smb2_set_err_rsp(work);
 223 }
 224
 225 /**
 226  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
 227  * @work:       smb work containing smb request buffer
 228  *
 229  * smb2 negotiate response is sent in reply of smb1 negotiate command for
 230  * dialect auto-negotiation.
 231  */
 232 int init_smb2_neg_rsp(struct ksmbd_work *work)
 233 {
 234         struct smb2_hdr *rsp_hdr;
 235         struct smb2_negotiate_rsp *rsp;
 236         struct ksmbd_conn *conn = work->conn;
 237
 238         if (conn->need_neg == false)
 239                 return -EINVAL;
 240
 241         *(__be32 *)work->response_buf =
 242                 cpu_to_be32(conn->vals->header_size);
 243
 244         rsp_hdr = smb2_get_msg(work->response_buf);
 245         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 246         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 247         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 248         rsp_hdr->CreditRequest = cpu_to_le16(2);
 249         rsp_hdr->Command = SMB2_NEGOTIATE;
 250         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 251         rsp_hdr->NextCommand = 0;
 252         rsp_hdr->MessageId = 0;
 253         rsp_hdr->Id.SyncId.ProcessId = 0;
 254         rsp_hdr->Id.SyncId.TreeId = 0;
 255         rsp_hdr->SessionId = 0;
 256         memset(rsp_hdr->Signature, 0, 16);
 257
 258         rsp = smb2_get_msg(work->response_buf);
 259
 260         WARN_ON(ksmbd_conn_good(work));
 261
 262         rsp->StructureSize = cpu_to_le16(65);
 263         ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
 264         rsp->DialectRevision = cpu_to_le16(conn->dialect);
 265         /* Not setting conn guid rsp->ServerGUID, as it
 266          * not used by client for identifying connection
 267          */
 268         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
 269         /* Default Max Message Size till SMB2.0, 64K*/
 270         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
 271         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 272         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 273
 274         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
 275         rsp->ServerStartTime = 0;
 276
 277         rsp->SecurityBufferOffset = cpu_to_le16(128);
 278         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
 279         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
 280                 le16_to_cpu(rsp->SecurityBufferOffset));
 281         inc_rfc1001_len(work->response_buf,
 282                         sizeof(struct smb2_negotiate_rsp) -
 283                         sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
 284                         AUTH_GSS_LENGTH);
 285         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
 286         if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
 287                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
 288         conn->use_spnego = true;
 289
 290         ksmbd_conn_set_need_negotiate(work);
 291         return 0;
 292 }
 293
 294 /**
 295  * smb2_set_rsp_credits() - set number of credits in response buffer
 296  * @work:       smb work containing smb response buffer
 297  */
 298 int smb2_set_rsp_credits(struct ksmbd_work *work)
 299 {
 300         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 301         struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
 302         struct ksmbd_conn *conn = work->conn;
 303         unsigned short credits_requested, aux_max;
 304         unsigned short credit_charge, credits_granted = 0;
 305
 306         if (work->send_no_response)
 307                 return 0;
 308
 309         hdr->CreditCharge = req_hdr->CreditCharge;
 310
 311         if (conn->total_credits > conn->vals->max_credits) {
 312                 hdr->CreditRequest = 0;
 313                 pr_err("Total credits overflow: %d\n", conn->total_credits);
 314                 return -EINVAL;
 315         }
 316
 317         credit_charge = max_t(unsigned short,
 318                               le16_to_cpu(req_hdr->CreditCharge), 1);
 319         if (credit_charge > conn->total_credits) {
 320                 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
 321                             credit_charge, conn->total_credits);
 322                 return -EINVAL;
 323         }
 324
 325         conn->total_credits -= credit_charge;
 326         conn->outstanding_credits -= credit_charge;
 327         credits_requested = max_t(unsigned short,
 328                                   le16_to_cpu(req_hdr->CreditRequest), 1);
 329
 330         /* according to smb2.credits smbtorture, Windows server
 331          * 2016 or later grant up to 8192 credits at once.
 332          *
 333          * TODO: Need to adjuct CreditRequest value according to
 334          * current cpu load
 335          */
 336         if (hdr->Command == SMB2_NEGOTIATE)
 337                 aux_max = 1;
 338         else
 339                 aux_max = conn->vals->max_credits - credit_charge;
 340         credits_granted = min_t(unsigned short, credits_requested, aux_max);
 341
 342         if (conn->vals->max_credits - conn->total_credits < credits_granted)
 343                 credits_granted = conn->vals->max_credits -
 344                         conn->total_credits;
 345
 346         conn->total_credits += credits_granted;
 347         work->credits_granted += credits_granted;
 348
 349         if (!req_hdr->NextCommand) {
 350                 /* Update CreditRequest in last request */
 351                 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
 352         }
 353         ksmbd_debug(SMB,
 354                     "credits: requested[%d] granted[%d] total_granted[%d]\n",
 355                     credits_requested, credits_granted,
 356                     conn->total_credits);
 357         return 0;
 358 }
 359
 360 /**
 361  * init_chained_smb2_rsp() - initialize smb2 chained response
 362  * @work:       smb work containing smb response buffer
 363  */
 364 static void init_chained_smb2_rsp(struct ksmbd_work *work)
 365 {
 366         struct smb2_hdr *req = ksmbd_req_buf_next(work);
 367         struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
 368         struct smb2_hdr *rsp_hdr;
 369         struct smb2_hdr *rcv_hdr;
 370         int next_hdr_offset = 0;
 371         int len, new_len;
 372
 373         /* Len of this response = updated RFC len - offset of previous cmd
 374          * in the compound rsp
 375          */
 376
 377         /* Storing the current local FID which may be needed by subsequent
 378          * command in the compound request
 379          */
 380         if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
 381                 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
 382                 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
 383                 work->compound_sid = le64_to_cpu(rsp->SessionId);
 384         }
 385
 386         len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
 387         next_hdr_offset = le32_to_cpu(req->NextCommand);
 388
 389         new_len = ALIGN(len, 8);
 390         inc_rfc1001_len(work->response_buf,
 391                         sizeof(struct smb2_hdr) + new_len - len);
 392         rsp->NextCommand = cpu_to_le32(new_len);
 393
 394         work->next_smb2_rcv_hdr_off += next_hdr_offset;
 395         work->next_smb2_rsp_hdr_off += new_len;
 396         ksmbd_debug(SMB,
 397                     "Compound req new_len = %d rcv off = %d rsp off = %d\n",
 398                     new_len, work->next_smb2_rcv_hdr_off,
 399                     work->next_smb2_rsp_hdr_off);
 400
 401         rsp_hdr = ksmbd_resp_buf_next(work);
 402         rcv_hdr = ksmbd_req_buf_next(work);
 403
 404         if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
 405                 ksmbd_debug(SMB, "related flag should be set\n");
 406                 work->compound_fid = KSMBD_NO_FID;
 407                 work->compound_pfid = KSMBD_NO_FID;
 408         }
 409         memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 410         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 411         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 412         rsp_hdr->Command = rcv_hdr->Command;
 413
 414         /*
 415          * Message is response. We don't grant oplock yet.
 416          */
 417         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
 418                                 SMB2_FLAGS_RELATED_OPERATIONS);
 419         rsp_hdr->NextCommand = 0;
 420         rsp_hdr->MessageId = rcv_hdr->MessageId;
 421         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 422         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 423         rsp_hdr->SessionId = rcv_hdr->SessionId;
 424         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 425 }
 426
 427 /**
 428  * is_chained_smb2_message() - check for chained command
 429  * @work:       smb work containing smb request buffer
 430  *
 431  * Return:      true if chained request, otherwise false
 432  */
 433 bool is_chained_smb2_message(struct ksmbd_work *work)
 434 {
 435         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 436         unsigned int len, next_cmd;
 437
 438         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 439                 return false;
 440
 441         hdr = ksmbd_req_buf_next(work);
 442         next_cmd = le32_to_cpu(hdr->NextCommand);
 443         if (next_cmd > 0) {
 444                 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
 445                         __SMB2_HEADER_STRUCTURE_SIZE >
 446                     get_rfc1002_len(work->request_buf)) {
 447                         pr_err("next command(%u) offset exceeds smb msg size\n",
 448                                next_cmd);
 449                         return false;
 450                 }
 451
 452                 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
 453                     work->response_sz) {
 454                         pr_err("next response offset exceeds response buffer size\n");
 455                         return false;
 456                 }
 457
 458                 ksmbd_debug(SMB, "got SMB2 chained command\n");
 459                 init_chained_smb2_rsp(work);
 460                 return true;
 461         } else if (work->next_smb2_rcv_hdr_off) {
 462                 /*
 463                  * This is last request in chained command,
 464                  * align response to 8 byte
 465                  */
 466                 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
 467                 len = len - get_rfc1002_len(work->response_buf);
 468                 if (len) {
 469                         ksmbd_debug(SMB, "padding len %u\n", len);
 470                         inc_rfc1001_len(work->response_buf, len);
 471                         if (work->aux_payload_sz)
 472                                 work->aux_payload_sz += len;
 473                 }
 474         }
 475         return false;
 476 }
 477
 478 /**
 479  * init_smb2_rsp_hdr() - initialize smb2 response
 480  * @work:       smb work containing smb request buffer
 481  *
 482  * Return:      0
 483  */
 484 int init_smb2_rsp_hdr(struct ksmbd_work *work)
 485 {
 486         struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
 487         struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
 488         struct ksmbd_conn *conn = work->conn;
 489
 490         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 491         *(__be32 *)work->response_buf =
 492                 cpu_to_be32(conn->vals->header_size);
 493         rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
 494         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 495         rsp_hdr->Command = rcv_hdr->Command;
 496
 497         /*
 498          * Message is response. We don't grant oplock yet.
 499          */
 500         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 501         rsp_hdr->NextCommand = 0;
 502         rsp_hdr->MessageId = rcv_hdr->MessageId;
 503         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 504         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 505         rsp_hdr->SessionId = rcv_hdr->SessionId;
 506         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 507
 508         work->syncronous = true;
 509         if (work->async_id) {
 510                 ksmbd_release_id(&conn->async_ida, work->async_id);
 511                 work->async_id = 0;
 512         }
 513
 514         return 0;
 515 }
 516
 517 /**
 518  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
 519  * @work:       smb work containing smb request buffer
 520  *
 521  * Return:      0 on success, otherwise -ENOMEM
 522  */
 523 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
 524 {
 525         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 526         size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
 527         size_t large_sz = small_sz + work->conn->vals->max_trans_size;
 528         size_t sz = small_sz;
 529         int cmd = le16_to_cpu(hdr->Command);
 530
 531         if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
 532                 sz = large_sz;
 533
 534         if (cmd == SMB2_QUERY_INFO_HE) {
 535                 struct smb2_query_info_req *req;
 536
 537                 req = smb2_get_msg(work->request_buf);
 538                 if ((req->InfoType == SMB2_O_INFO_FILE &&
 539                      (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
 540                      req->FileInfoClass == FILE_ALL_INFORMATION)) ||
 541                     req->InfoType == SMB2_O_INFO_SECURITY)
 542                         sz = large_sz;
 543         }
 544
 545         /* allocate large response buf for chained commands */
 546         if (le32_to_cpu(hdr->NextCommand) > 0)
 547                 sz = large_sz;
 548
 549         work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
 550         if (!work->response_buf)
 551                 return -ENOMEM;
 552
 553         work->response_sz = sz;
 554         return 0;
 555 }
 556
 557 /**
 558  * smb2_check_user_session() - check for valid session for a user
 559  * @work:       smb work containing smb request buffer
 560  *
 561  * Return:      0 on success, otherwise error
 562  */
 563 int smb2_check_user_session(struct ksmbd_work *work)
 564 {
 565         struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
 566         struct ksmbd_conn *conn = work->conn;
 567         unsigned int cmd = conn->ops->get_cmd_val(work);
 568         unsigned long long sess_id;
 569
 570         work->sess = NULL;
 571         /*
 572          * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
 573          * require a session id, so no need to validate user session's for
 574          * these commands.
 575          */
 576         if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
 577             cmd == SMB2_SESSION_SETUP_HE)
 578                 return 0;
 579
 580         if (!ksmbd_conn_good(work))
 581                 return -EINVAL;
 582
 583         sess_id = le64_to_cpu(req_hdr->SessionId);
 584         /* Check for validity of user session */
 585         work->sess = ksmbd_session_lookup_all(conn, sess_id);
 586         if (work->sess)
 587                 return 1;
 588         ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 589         return -EINVAL;
 590 }
 591
 592 static void destroy_previous_session(struct ksmbd_conn *conn,
 593                                      struct ksmbd_user *user, u64 id)
 594 {
 595         struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
 596         struct ksmbd_user *prev_user;
 597         struct channel *chann;
 598
 599         if (!prev_sess)
 600                 return;
 601
 602         prev_user = prev_sess->user;
 603
 604         if (!prev_user ||
 605             strcmp(user->name, prev_user->name) ||
 606             user->passkey_sz != prev_user->passkey_sz ||
 607             memcmp(user->passkey, prev_user->passkey, user->passkey_sz))
 608                 return;
 609
 610         prev_sess->state = SMB2_SESSION_EXPIRED;
 611         write_lock(&prev_sess->chann_lock);
 612         list_for_each_entry(chann, &prev_sess->ksmbd_chann_list, chann_list)
 613                 chann->conn->status = KSMBD_SESS_EXITING;
 614         write_unlock(&prev_sess->chann_lock);
 615 }
 616
 617 /**
 618  * smb2_get_name() - get filename string from on the wire smb format
 619  * @src:        source buffer
 620  * @maxlen:     maxlen of source string
 621  * @local_nls:  nls_table pointer
 622  *
 623  * Return:      matching converted filename on success, otherwise error ptr
 624  */
 625 static char *
 626 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
 627 {
 628         char *name;
 629
 630         name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
 631         if (IS_ERR(name)) {
 632                 pr_err("failed to get name %ld\n", PTR_ERR(name));
 633                 return name;
 634         }
 635
 636         ksmbd_conv_path_to_unix(name);
 637         ksmbd_strip_last_slash(name);
 638         return name;
 639 }
 640
 641 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
 642 {
 643         struct smb2_hdr *rsp_hdr;
 644         struct ksmbd_conn *conn = work->conn;
 645         int id;
 646
 647         rsp_hdr = smb2_get_msg(work->response_buf);
 648         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 649
 650         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 651         if (id < 0) {
 652                 pr_err("Failed to alloc async message id\n");
 653                 return id;
 654         }
 655         work->syncronous = false;
 656         work->async_id = id;
 657         rsp_hdr->Id.AsyncId = cpu_to_le64(id);
 658
 659         ksmbd_debug(SMB,
 660                     "Send interim Response to inform async request id : %d\n",
 661                     work->async_id);
 662
 663         work->cancel_fn = fn;
 664         work->cancel_argv = arg;
 665
 666         if (list_empty(&work->async_request_entry)) {
 667                 spin_lock(&conn->request_lock);
 668                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 669                 spin_unlock(&conn->request_lock);
 670         }
 671
 672         return 0;
 673 }
 674
 675 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 676 {
 677         struct smb2_hdr *rsp_hdr;
 678
 679         rsp_hdr = smb2_get_msg(work->response_buf);
 680         smb2_set_err_rsp(work);
 681         rsp_hdr->Status = status;
 682
 683         work->multiRsp = 1;
 684         ksmbd_conn_write(work);
 685         rsp_hdr->Status = 0;
 686         work->multiRsp = 0;
 687 }
 688
 689 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 690 {
 691         if (S_ISDIR(mode) || S_ISREG(mode))
 692                 return 0;
 693
 694         if (S_ISLNK(mode))
 695                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 696         else if (S_ISFIFO(mode))
 697                 return IO_REPARSE_TAG_LX_FIFO_LE;
 698         else if (S_ISSOCK(mode))
 699                 return IO_REPARSE_TAG_AF_UNIX_LE;
 700         else if (S_ISCHR(mode))
 701                 return IO_REPARSE_TAG_LX_CHR_LE;
 702         else if (S_ISBLK(mode))
 703                 return IO_REPARSE_TAG_LX_BLK_LE;
 704
 705         return 0;
 706 }
 707
 708 /**
 709  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 710  * @stat:       kstat containing file mode
 711  * @attribute:  attribute flags
 712  *
 713  * Return:      converted dos mode
 714  */
 715 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 716 {
 717         int attr = 0;
 718
 719         if (S_ISDIR(stat->mode)) {
 720                 attr = FILE_ATTRIBUTE_DIRECTORY |
 721                         (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
 722         } else {
 723                 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
 724                 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
 725                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 726                                 FILE_SUPPORTS_SPARSE_FILES))
 727                         attr |= FILE_ATTRIBUTE_SPARSE_FILE;
 728
 729                 if (smb2_get_reparse_tag_special_file(stat->mode))
 730                         attr |= FILE_ATTRIBUTE_REPARSE_POINT;
 731         }
 732
 733         return attr;
 734 }
 735
 736 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 737                                __le16 hash_id)
 738 {
 739         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 740         pneg_ctxt->DataLength = cpu_to_le16(38);
 741         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 742         pneg_ctxt->Reserved = cpu_to_le32(0);
 743         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 744         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 745         pneg_ctxt->HashAlgorithms = hash_id;
 746 }
 747
 748 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 749                                __le16 cipher_type)
 750 {
 751         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 752         pneg_ctxt->DataLength = cpu_to_le16(4);
 753         pneg_ctxt->Reserved = cpu_to_le32(0);
 754         pneg_ctxt->CipherCount = cpu_to_le16(1);
 755         pneg_ctxt->Ciphers[0] = cipher_type;
 756 }
 757
 758 static void build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt,
 759                                    __le16 comp_algo)
 760 {
 761         pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
 762         pneg_ctxt->DataLength =
 763                 cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
 764                         - sizeof(struct smb2_neg_context));
 765         pneg_ctxt->Reserved = cpu_to_le32(0);
 766         pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(1);
 767         pneg_ctxt->Flags = cpu_to_le32(0);
 768         pneg_ctxt->CompressionAlgorithms[0] = comp_algo;
 769 }
 770
 771 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 772                                 __le16 sign_algo)
 773 {
 774         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 775         pneg_ctxt->DataLength =
 776                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 777                         - sizeof(struct smb2_neg_context));
 778         pneg_ctxt->Reserved = cpu_to_le32(0);
 779         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 780         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 781 }
 782
 783 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 784 {
 785         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 786         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 787         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 788         pneg_ctxt->Name[0] = 0x93;
 789         pneg_ctxt->Name[1] = 0xAD;
 790         pneg_ctxt->Name[2] = 0x25;
 791         pneg_ctxt->Name[3] = 0x50;
 792         pneg_ctxt->Name[4] = 0x9C;
 793         pneg_ctxt->Name[5] = 0xB4;
 794         pneg_ctxt->Name[6] = 0x11;
 795         pneg_ctxt->Name[7] = 0xE7;
 796         pneg_ctxt->Name[8] = 0xB4;
 797         pneg_ctxt->Name[9] = 0x23;
 798         pneg_ctxt->Name[10] = 0x83;
 799         pneg_ctxt->Name[11] = 0xDE;
 800         pneg_ctxt->Name[12] = 0x96;
 801         pneg_ctxt->Name[13] = 0x8B;
 802         pneg_ctxt->Name[14] = 0xCD;
 803         pneg_ctxt->Name[15] = 0x7C;
 804 }
 805
 806 static void assemble_neg_contexts(struct ksmbd_conn *conn,
 807                                   struct smb2_negotiate_rsp *rsp,
 808                                   void *smb2_buf_len)
 809 {
 810         char *pneg_ctxt = (char *)rsp +
 811                         le32_to_cpu(rsp->NegotiateContextOffset);
 812         int neg_ctxt_cnt = 1;
 813         int ctxt_size;
 814
 815         ksmbd_debug(SMB,
 816                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 817         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 818                            conn->preauth_info->Preauth_HashId);
 819         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 820         inc_rfc1001_len(smb2_buf_len, AUTH_GSS_PADDING);
 821         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 822         /* Round to 8 byte boundary */
 823         pneg_ctxt += round_up(sizeof(struct smb2_preauth_neg_context), 8);
 824
 825         if (conn->cipher_type) {
 826                 ctxt_size = round_up(ctxt_size, 8);
 827                 ksmbd_debug(SMB,
 828                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 829                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt,
 830                                    conn->cipher_type);
 831                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 832                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 833                 /* Round to 8 byte boundary */
 834                 pneg_ctxt +=
 835                         round_up(sizeof(struct smb2_encryption_neg_context) + 2,
 836                                  8);
 837         }
 838
 839         if (conn->compress_algorithm) {
 840                 ctxt_size = round_up(ctxt_size, 8);
 841                 ksmbd_debug(SMB,
 842                             "assemble SMB2_COMPRESSION_CAPABILITIES context\n");
 843                 /* Temporarily set to SMB3_COMPRESS_NONE */
 844                 build_compression_ctxt((struct smb2_compression_capabilities_context *)pneg_ctxt,
 845                                        conn->compress_algorithm);
 846                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 847                 ctxt_size += sizeof(struct smb2_compression_capabilities_context) + 2;
 848                 /* Round to 8 byte boundary */
 849                 pneg_ctxt += round_up(sizeof(struct smb2_compression_capabilities_context) + 2,
 850                                       8);
 851         }
 852
 853         if (conn->posix_ext_supported) {
 854                 ctxt_size = round_up(ctxt_size, 8);
 855                 ksmbd_debug(SMB,
 856                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 857                 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
 858                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 859                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 860                 /* Round to 8 byte boundary */
 861                 pneg_ctxt += round_up(sizeof(struct smb2_posix_neg_context), 8);
 862         }
 863
 864         if (conn->signing_negotiated) {
 865                 ctxt_size = round_up(ctxt_size, 8);
 866                 ksmbd_debug(SMB,
 867                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 868                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)pneg_ctxt,
 869                                     conn->signing_algorithm);
 870                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 871                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 872         }
 873
 874         inc_rfc1001_len(smb2_buf_len, ctxt_size);
 875 }
 876
 877 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 878                                   struct smb2_preauth_neg_context *pneg_ctxt)
 879 {
 880         __le32 err = STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 881
 882         if (pneg_ctxt->HashAlgorithms == SMB2_PREAUTH_INTEGRITY_SHA512) {
 883                 conn->preauth_info->Preauth_HashId =
 884                         SMB2_PREAUTH_INTEGRITY_SHA512;
 885                 err = STATUS_SUCCESS;
 886         }
 887
 888         return err;
 889 }
 890
 891 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 892                                 struct smb2_encryption_neg_context *pneg_ctxt,
 893                                 int len_of_ctxts)
 894 {
 895         int cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 896         int i, cphs_size = cph_cnt * sizeof(__le16);
 897
 898         conn->cipher_type = 0;
 899
 900         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 901             len_of_ctxts) {
 902                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 903                 return;
 904         }
 905
 906         if (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION))
 907                 return;
 908
 909         for (i = 0; i < cph_cnt; i++) {
 910                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 911                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 912                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 913                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 914                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 915                                     pneg_ctxt->Ciphers[i]);
 916                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 917                         break;
 918                 }
 919         }
 920 }
 921
 922 /**
 923  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
 924  * @conn:       smb connection
 925  *
 926  * Return:      true if connection should be encrypted, else false
 927  */
 928 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
 929 {
 930         if (!conn->ops->generate_encryptionkey)
 931                 return false;
 932
 933         /*
 934          * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
 935          * SMB 3.1.1 uses the cipher_type field.
 936          */
 937         return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
 938             conn->cipher_type;
 939 }
 940
 941 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 942                                  struct smb2_compression_capabilities_context *pneg_ctxt)
 943 {
 944         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 945 }
 946
 947 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 948                                  struct smb2_signing_capabilities *pneg_ctxt,
 949                                  int len_of_ctxts)
 950 {
 951         int sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 952         int i, sign_alos_size = sign_algo_cnt * sizeof(__le16);
 953
 954         conn->signing_negotiated = false;
 955
 956         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 957             len_of_ctxts) {
 958                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 959                 return;
 960         }
 961
 962         for (i = 0; i < sign_algo_cnt; i++) {
 963                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
 964                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
 965                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
 966                                     pneg_ctxt->SigningAlgorithms[i]);
 967                         conn->signing_negotiated = true;
 968                         conn->signing_algorithm =
 969                                 pneg_ctxt->SigningAlgorithms[i];
 970                         break;
 971                 }
 972         }
 973 }
 974
 975 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
 976                                       struct smb2_negotiate_req *req,
 977                                       int len_of_smb)
 978 {
 979         /* +4 is to account for the RFC1001 len field */
 980         struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
 981         int i = 0, len_of_ctxts;
 982         int offset = le32_to_cpu(req->NegotiateContextOffset);
 983         int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
 984         __le32 status = STATUS_INVALID_PARAMETER;
 985
 986         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
 987         if (len_of_smb <= offset) {
 988                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
 989                 return status;
 990         }
 991
 992         len_of_ctxts = len_of_smb - offset;
 993
 994         while (i++ < neg_ctxt_cnt) {
 995                 int clen;
 996
 997                 /* check that offset is not beyond end of SMB */
 998                 if (len_of_ctxts == 0)
 999                         break;
1000
1001                 if (len_of_ctxts < sizeof(struct smb2_neg_context))
1002                         break;
1003
1004                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1005                 clen = le16_to_cpu(pctx->DataLength);
1006                 if (clen + sizeof(struct smb2_neg_context) > len_of_ctxts)
1007                         break;
1008
1009                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1010                         ksmbd_debug(SMB,
1011                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1012                         if (conn->preauth_info->Preauth_HashId)
1013                                 break;
1014
1015                         status = decode_preauth_ctxt(conn,
1016                                                      (struct smb2_preauth_neg_context *)pctx);
1017                         if (status != STATUS_SUCCESS)
1018                                 break;
1019                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1020                         ksmbd_debug(SMB,
1021                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1022                         if (conn->cipher_type)
1023                                 break;
1024
1025                         decode_encrypt_ctxt(conn,
1026                                             (struct smb2_encryption_neg_context *)pctx,
1027                                             len_of_ctxts);
1028                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1029                         ksmbd_debug(SMB,
1030                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1031                         if (conn->compress_algorithm)
1032                                 break;
1033
1034                         decode_compress_ctxt(conn,
1035                                              (struct smb2_compression_capabilities_context *)pctx);
1036                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1037                         ksmbd_debug(SMB,
1038                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1039                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1040                         ksmbd_debug(SMB,
1041                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1042                         conn->posix_ext_supported = true;
1043                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1044                         ksmbd_debug(SMB,
1045                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1046                         decode_sign_cap_ctxt(conn,
1047                                              (struct smb2_signing_capabilities *)pctx,
1048                                              len_of_ctxts);
1049                 }
1050
1051                 /* offsets must be 8 byte aligned */
1052                 clen = (clen + 7) & ~0x7;
1053                 offset = clen + sizeof(struct smb2_neg_context);
1054                 len_of_ctxts -= clen + sizeof(struct smb2_neg_context);
1055         }
1056         return status;
1057 }
1058
1059 /**
1060  * smb2_handle_negotiate() - handler for smb2 negotiate command
1061  * @work:       smb work containing smb request buffer
1062  *
1063  * Return:      0
1064  */
1065 int smb2_handle_negotiate(struct ksmbd_work *work)
1066 {
1067         struct ksmbd_conn *conn = work->conn;
1068         struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1069         struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1070         int rc = 0;
1071         unsigned int smb2_buf_len, smb2_neg_size;
1072         __le32 status;
1073
1074         ksmbd_debug(SMB, "Received negotiate request\n");
1075         conn->need_neg = false;
1076         if (ksmbd_conn_good(work)) {
1077                 pr_err("conn->tcp_status is already in CifsGood State\n");
1078                 work->send_no_response = 1;
1079                 return rc;
1080         }
1081
1082         if (req->DialectCount == 0) {
1083                 pr_err("malformed packet\n");
1084                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1085                 rc = -EINVAL;
1086                 goto err_out;
1087         }
1088
1089         smb2_buf_len = get_rfc1002_len(work->request_buf);
1090         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1091         if (smb2_neg_size > smb2_buf_len) {
1092                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1093                 rc = -EINVAL;
1094                 goto err_out;
1095         }
1096
1097         if (conn->dialect == SMB311_PROT_ID) {
1098                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1099
1100                 if (smb2_buf_len < nego_ctxt_off) {
1101                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1102                         rc = -EINVAL;
1103                         goto err_out;
1104                 }
1105
1106                 if (smb2_neg_size > nego_ctxt_off) {
1107                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1108                         rc = -EINVAL;
1109                         goto err_out;
1110                 }
1111
1112                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1113                     nego_ctxt_off) {
1114                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1115                         rc = -EINVAL;
1116                         goto err_out;
1117                 }
1118         } else {
1119                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1120                     smb2_buf_len) {
1121                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1122                         rc = -EINVAL;
1123                         goto err_out;
1124                 }
1125         }
1126
1127         conn->cli_cap = le32_to_cpu(req->Capabilities);
1128         switch (conn->dialect) {
1129         case SMB311_PROT_ID:
1130                 conn->preauth_info =
1131                         kzalloc(sizeof(struct preauth_integrity_info),
1132                                 GFP_KERNEL);
1133                 if (!conn->preauth_info) {
1134                         rc = -ENOMEM;
1135                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1136                         goto err_out;
1137                 }
1138
1139                 status = deassemble_neg_contexts(conn, req,
1140                                                  get_rfc1002_len(work->request_buf));
1141                 if (status != STATUS_SUCCESS) {
1142                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1143                                status);
1144                         rsp->hdr.Status = status;
1145                         rc = -EINVAL;
1146                         kfree(conn->preauth_info);
1147                         conn->preauth_info = NULL;
1148                         goto err_out;
1149                 }
1150
1151                 rc = init_smb3_11_server(conn);
1152                 if (rc < 0) {
1153                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1154                         kfree(conn->preauth_info);
1155                         conn->preauth_info = NULL;
1156                         goto err_out;
1157                 }
1158
1159                 ksmbd_gen_preauth_integrity_hash(conn,
1160                                                  work->request_buf,
1161                                                  conn->preauth_info->Preauth_HashValue);
1162                 rsp->NegotiateContextOffset =
1163                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1164                 assemble_neg_contexts(conn, rsp, work->response_buf);
1165                 break;
1166         case SMB302_PROT_ID:
1167                 init_smb3_02_server(conn);
1168                 break;
1169         case SMB30_PROT_ID:
1170                 init_smb3_0_server(conn);
1171                 break;
1172         case SMB21_PROT_ID:
1173                 init_smb2_1_server(conn);
1174                 break;
1175         case SMB2X_PROT_ID:
1176         case BAD_PROT_ID:
1177         default:
1178                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1179                             conn->dialect);
1180                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1181                 rc = -EINVAL;
1182                 goto err_out;
1183         }
1184         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1185
1186         /* For stats */
1187         conn->connection_type = conn->dialect;
1188
1189         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1190         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1191         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1192
1193         memcpy(conn->ClientGUID, req->ClientGUID,
1194                         SMB2_CLIENT_GUID_SIZE);
1195         conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1196
1197         rsp->StructureSize = cpu_to_le16(65);
1198         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1199         /* Not setting conn guid rsp->ServerGUID, as it
1200          * not used by client for identifying server
1201          */
1202         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1203
1204         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1205         rsp->ServerStartTime = 0;
1206         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1207                     le32_to_cpu(rsp->NegotiateContextOffset),
1208                     le16_to_cpu(rsp->NegotiateContextCount));
1209
1210         rsp->SecurityBufferOffset = cpu_to_le16(128);
1211         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1212         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1213                                   le16_to_cpu(rsp->SecurityBufferOffset));
1214         inc_rfc1001_len(work->response_buf, sizeof(struct smb2_negotiate_rsp) -
1215                         sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
1216                          AUTH_GSS_LENGTH);
1217         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1218         conn->use_spnego = true;
1219
1220         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1221              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1222             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1223                 conn->sign = true;
1224         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1225                 server_conf.enforced_signing = true;
1226                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1227                 conn->sign = true;
1228         }
1229
1230         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1231         ksmbd_conn_set_need_negotiate(work);
1232
1233 err_out:
1234         if (rc < 0)
1235                 smb2_set_err_rsp(work);
1236
1237         return rc;
1238 }
1239
1240 static int alloc_preauth_hash(struct ksmbd_session *sess,
1241                               struct ksmbd_conn *conn)
1242 {
1243         if (sess->Preauth_HashValue)
1244                 return 0;
1245
1246         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1247                                           PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1248         if (!sess->Preauth_HashValue)
1249                 return -ENOMEM;
1250
1251         return 0;
1252 }
1253
1254 static int generate_preauth_hash(struct ksmbd_work *work)
1255 {
1256         struct ksmbd_conn *conn = work->conn;
1257         struct ksmbd_session *sess = work->sess;
1258         u8 *preauth_hash;
1259
1260         if (conn->dialect != SMB311_PROT_ID)
1261                 return 0;
1262
1263         if (conn->binding) {
1264                 struct preauth_session *preauth_sess;
1265
1266                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1267                 if (!preauth_sess) {
1268                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1269                         if (!preauth_sess)
1270                                 return -ENOMEM;
1271                 }
1272
1273                 preauth_hash = preauth_sess->Preauth_HashValue;
1274         } else {
1275                 if (!sess->Preauth_HashValue)
1276                         if (alloc_preauth_hash(sess, conn))
1277                                 return -ENOMEM;
1278                 preauth_hash = sess->Preauth_HashValue;
1279         }
1280
1281         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1282         return 0;
1283 }
1284
1285 static int decode_negotiation_token(struct ksmbd_conn *conn,
1286                                     struct negotiate_message *negblob,
1287                                     size_t sz)
1288 {
1289         if (!conn->use_spnego)
1290                 return -EINVAL;
1291
1292         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1293                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1294                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1295                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1296                         conn->use_spnego = false;
1297                 }
1298         }
1299         return 0;
1300 }
1301
1302 static int ntlm_negotiate(struct ksmbd_work *work,
1303                           struct negotiate_message *negblob,
1304                           size_t negblob_len)
1305 {
1306         struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1307         struct challenge_message *chgblob;
1308         unsigned char *spnego_blob = NULL;
1309         u16 spnego_blob_len;
1310         char *neg_blob;
1311         int sz, rc;
1312
1313         ksmbd_debug(SMB, "negotiate phase\n");
1314         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1315         if (rc)
1316                 return rc;
1317
1318         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1319         chgblob =
1320                 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1321         memset(chgblob, 0, sizeof(struct challenge_message));
1322
1323         if (!work->conn->use_spnego) {
1324                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1325                 if (sz < 0)
1326                         return -ENOMEM;
1327
1328                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1329                 return 0;
1330         }
1331
1332         sz = sizeof(struct challenge_message);
1333         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1334
1335         neg_blob = kzalloc(sz, GFP_KERNEL);
1336         if (!neg_blob)
1337                 return -ENOMEM;
1338
1339         chgblob = (struct challenge_message *)neg_blob;
1340         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1341         if (sz < 0) {
1342                 rc = -ENOMEM;
1343                 goto out;
1344         }
1345
1346         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1347                                            neg_blob, sz);
1348         if (rc) {
1349                 rc = -ENOMEM;
1350                 goto out;
1351         }
1352
1353         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1354         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1355         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1356
1357 out:
1358         kfree(spnego_blob);
1359         kfree(neg_blob);
1360         return rc;
1361 }
1362
1363 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1364                                                   struct smb2_sess_setup_req *req)
1365 {
1366         int sz;
1367
1368         if (conn->use_spnego && conn->mechToken)
1369                 return (struct authenticate_message *)conn->mechToken;
1370
1371         sz = le16_to_cpu(req->SecurityBufferOffset);
1372         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1373                                                + sz);
1374 }
1375
1376 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1377                                        struct smb2_sess_setup_req *req)
1378 {
1379         struct authenticate_message *authblob;
1380         struct ksmbd_user *user;
1381         char *name;
1382         unsigned int auth_msg_len, name_off, name_len, secbuf_len;
1383
1384         secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1385         if (secbuf_len < sizeof(struct authenticate_message)) {
1386                 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1387                 return NULL;
1388         }
1389         authblob = user_authblob(conn, req);
1390         name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1391         name_len = le16_to_cpu(authblob->UserName.Length);
1392         auth_msg_len = le16_to_cpu(req->SecurityBufferOffset) + secbuf_len;
1393
1394         if (auth_msg_len < (u64)name_off + name_len)
1395                 return NULL;
1396
1397         name = smb_strndup_from_utf16((const char *)authblob + name_off,
1398                                       name_len,
1399                                       true,
1400                                       conn->local_nls);
1401         if (IS_ERR(name)) {
1402                 pr_err("cannot allocate memory\n");
1403                 return NULL;
1404         }
1405
1406         ksmbd_debug(SMB, "session setup request for user %s\n", name);
1407         user = ksmbd_login_user(name);
1408         kfree(name);
1409         return user;
1410 }
1411
1412 static int ntlm_authenticate(struct ksmbd_work *work)
1413 {
1414         struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1415         struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1416         struct ksmbd_conn *conn = work->conn;
1417         struct ksmbd_session *sess = work->sess;
1418         struct channel *chann = NULL;
1419         struct ksmbd_user *user;
1420         u64 prev_id;
1421         int sz, rc;
1422
1423         ksmbd_debug(SMB, "authenticate phase\n");
1424         if (conn->use_spnego) {
1425                 unsigned char *spnego_blob;
1426                 u16 spnego_blob_len;
1427
1428                 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1429                                                     &spnego_blob_len,
1430                                                     0);
1431                 if (rc)
1432                         return -ENOMEM;
1433
1434                 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1435                 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1436                 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1437                 kfree(spnego_blob);
1438                 inc_rfc1001_len(work->response_buf, spnego_blob_len - 1);
1439         }
1440
1441         user = session_user(conn, req);
1442         if (!user) {
1443                 ksmbd_debug(SMB, "Unknown user name or an error\n");
1444                 return -EPERM;
1445         }
1446
1447         /* Check for previous session */
1448         prev_id = le64_to_cpu(req->PreviousSessionId);
1449         if (prev_id && prev_id != sess->id)
1450                 destroy_previous_session(conn, user, prev_id);
1451
1452         if (sess->state == SMB2_SESSION_VALID) {
1453                 /*
1454                  * Reuse session if anonymous try to connect
1455                  * on reauthetication.
1456                  */
1457                 if (ksmbd_anonymous_user(user)) {
1458                         ksmbd_free_user(user);
1459                         return 0;
1460                 }
1461
1462                 if (!ksmbd_compare_user(sess->user, user)) {
1463                         ksmbd_free_user(user);
1464                         return -EPERM;
1465                 }
1466                 ksmbd_free_user(user);
1467         } else {
1468                 sess->user = user;
1469         }
1470
1471         if (user_guest(sess->user)) {
1472                 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1473         } else {
1474                 struct authenticate_message *authblob;
1475
1476                 authblob = user_authblob(conn, req);
1477                 sz = le16_to_cpu(req->SecurityBufferLength);
1478                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1479                 if (rc) {
1480                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1481                         ksmbd_debug(SMB, "authentication failed\n");
1482                         return -EPERM;
1483                 }
1484         }
1485
1486         /*
1487          * If session state is SMB2_SESSION_VALID, We can assume
1488          * that it is reauthentication. And the user/password
1489          * has been verified, so return it here.
1490          */
1491         if (sess->state == SMB2_SESSION_VALID) {
1492                 if (conn->binding)
1493                         goto binding_session;
1494                 return 0;
1495         }
1496
1497         if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1498              (conn->sign || server_conf.enforced_signing)) ||
1499             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1500                 sess->sign = true;
1501
1502         if (smb3_encryption_negotiated(conn) &&
1503                         !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1504                 rc = conn->ops->generate_encryptionkey(conn, sess);
1505                 if (rc) {
1506                         ksmbd_debug(SMB,
1507                                         "SMB3 encryption key generation failed\n");
1508                         return -EINVAL;
1509                 }
1510                 sess->enc = true;
1511                 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1512                 /*
1513                  * signing is disable if encryption is enable
1514                  * on this session
1515                  */
1516                 sess->sign = false;
1517         }
1518
1519 binding_session:
1520         if (conn->dialect >= SMB30_PROT_ID) {
1521                 read_lock(&sess->chann_lock);
1522                 chann = lookup_chann_list(sess, conn);
1523                 read_unlock(&sess->chann_lock);
1524                 if (!chann) {
1525                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1526                         if (!chann)
1527                                 return -ENOMEM;
1528
1529                         chann->conn = conn;
1530                         INIT_LIST_HEAD(&chann->chann_list);
1531                         write_lock(&sess->chann_lock);
1532                         list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1533                         write_unlock(&sess->chann_lock);
1534                 }
1535         }
1536
1537         if (conn->ops->generate_signingkey) {
1538                 rc = conn->ops->generate_signingkey(sess, conn);
1539                 if (rc) {
1540                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1541                         return -EINVAL;
1542                 }
1543         }
1544
1545         if (!ksmbd_conn_lookup_dialect(conn)) {
1546                 pr_err("fail to verify the dialect\n");
1547                 return -ENOENT;
1548         }
1549         return 0;
1550 }
1551
1552 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1553 static int krb5_authenticate(struct ksmbd_work *work)
1554 {
1555         struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1556         struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1557         struct ksmbd_conn *conn = work->conn;
1558         struct ksmbd_session *sess = work->sess;
1559         char *in_blob, *out_blob;
1560         struct channel *chann = NULL;
1561         u64 prev_sess_id;
1562         int in_len, out_len;
1563         int retval;
1564
1565         in_blob = (char *)&req->hdr.ProtocolId +
1566                 le16_to_cpu(req->SecurityBufferOffset);
1567         in_len = le16_to_cpu(req->SecurityBufferLength);
1568         out_blob = (char *)&rsp->hdr.ProtocolId +
1569                 le16_to_cpu(rsp->SecurityBufferOffset);
1570         out_len = work->response_sz -
1571                 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1572
1573         /* Check previous session */
1574         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1575         if (prev_sess_id && prev_sess_id != sess->id)
1576                 destroy_previous_session(conn, sess->user, prev_sess_id);
1577
1578         if (sess->state == SMB2_SESSION_VALID)
1579                 ksmbd_free_user(sess->user);
1580
1581         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1582                                          out_blob, &out_len);
1583         if (retval) {
1584                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1585                 return -EINVAL;
1586         }
1587         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1588         inc_rfc1001_len(work->response_buf, out_len - 1);
1589
1590         if ((conn->sign || server_conf.enforced_signing) ||
1591             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1592                 sess->sign = true;
1593
1594         if (smb3_encryption_negotiated(conn)) {
1595                 retval = conn->ops->generate_encryptionkey(conn, sess);
1596                 if (retval) {
1597                         ksmbd_debug(SMB,
1598                                     "SMB3 encryption key generation failed\n");
1599                         return -EINVAL;
1600                 }
1601                 sess->enc = true;
1602                 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1603                 sess->sign = false;
1604         }
1605
1606         if (conn->dialect >= SMB30_PROT_ID) {
1607                 read_lock(&sess->chann_lock);
1608                 chann = lookup_chann_list(sess, conn);
1609                 read_unlock(&sess->chann_lock);
1610                 if (!chann) {
1611                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1612                         if (!chann)
1613                                 return -ENOMEM;
1614
1615                         chann->conn = conn;
1616                         INIT_LIST_HEAD(&chann->chann_list);
1617                         write_lock(&sess->chann_lock);
1618                         list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1619                         write_unlock(&sess->chann_lock);
1620                 }
1621         }
1622
1623         if (conn->ops->generate_signingkey) {
1624                 retval = conn->ops->generate_signingkey(sess, conn);
1625                 if (retval) {
1626                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1627                         return -EINVAL;
1628                 }
1629         }
1630
1631         if (!ksmbd_conn_lookup_dialect(conn)) {
1632                 pr_err("fail to verify the dialect\n");
1633                 return -ENOENT;
1634         }
1635         return 0;
1636 }
1637 #else
1638 static int krb5_authenticate(struct ksmbd_work *work)
1639 {
1640         return -EOPNOTSUPP;
1641 }
1642 #endif
1643
1644 int smb2_sess_setup(struct ksmbd_work *work)
1645 {
1646         struct ksmbd_conn *conn = work->conn;
1647         struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1648         struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1649         struct ksmbd_session *sess;
1650         struct negotiate_message *negblob;
1651         unsigned int negblob_len, negblob_off;
1652         int rc = 0;
1653
1654         ksmbd_debug(SMB, "Received request for session setup\n");
1655
1656         rsp->StructureSize = cpu_to_le16(9);
1657         rsp->SessionFlags = 0;
1658         rsp->SecurityBufferOffset = cpu_to_le16(72);
1659         rsp->SecurityBufferLength = 0;
1660         inc_rfc1001_len(work->response_buf, 9);
1661
1662         if (!req->hdr.SessionId) {
1663                 sess = ksmbd_smb2_session_create();
1664                 if (!sess) {
1665                         rc = -ENOMEM;
1666                         goto out_err;
1667                 }
1668                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1669                 rc = ksmbd_session_register(conn, sess);
1670                 if (rc)
1671                         goto out_err;
1672         } else if (conn->dialect >= SMB30_PROT_ID &&
1673                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1674                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1675                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1676
1677                 sess = ksmbd_session_lookup_slowpath(sess_id);
1678                 if (!sess) {
1679                         rc = -ENOENT;
1680                         goto out_err;
1681                 }
1682
1683                 if (conn->dialect != sess->dialect) {
1684                         rc = -EINVAL;
1685                         goto out_err;
1686                 }
1687
1688                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1689                         rc = -EINVAL;
1690                         goto out_err;
1691                 }
1692
1693                 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1694                             SMB2_CLIENT_GUID_SIZE)) {
1695                         rc = -ENOENT;
1696                         goto out_err;
1697                 }
1698
1699                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1700                         rc = -EACCES;
1701                         goto out_err;
1702                 }
1703
1704                 if (sess->state == SMB2_SESSION_EXPIRED) {
1705                         rc = -EFAULT;
1706                         goto out_err;
1707                 }
1708
1709                 if (ksmbd_session_lookup(conn, sess_id)) {
1710                         rc = -EACCES;
1711                         goto out_err;
1712                 }
1713
1714                 conn->binding = true;
1715         } else if ((conn->dialect < SMB30_PROT_ID ||
1716                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1717                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1718                 sess = NULL;
1719                 rc = -EACCES;
1720                 goto out_err;
1721         } else {
1722                 sess = ksmbd_session_lookup(conn,
1723                                             le64_to_cpu(req->hdr.SessionId));
1724                 if (!sess) {
1725                         rc = -ENOENT;
1726                         goto out_err;
1727                 }
1728         }
1729         work->sess = sess;
1730
1731         if (sess->state == SMB2_SESSION_EXPIRED)
1732                 sess->state = SMB2_SESSION_IN_PROGRESS;
1733
1734         negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1735         negblob_len = le16_to_cpu(req->SecurityBufferLength);
1736         if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
1737             negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1738                 rc = -EINVAL;
1739                 goto out_err;
1740         }
1741
1742         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1743                         negblob_off);
1744
1745         if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1746                 if (conn->mechToken)
1747                         negblob = (struct negotiate_message *)conn->mechToken;
1748         }
1749
1750         if (server_conf.auth_mechs & conn->auth_mechs) {
1751                 rc = generate_preauth_hash(work);
1752                 if (rc)
1753                         goto out_err;
1754
1755                 if (conn->preferred_auth_mech &
1756                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1757                         rc = krb5_authenticate(work);
1758                         if (rc) {
1759                                 rc = -EINVAL;
1760                                 goto out_err;
1761                         }
1762
1763                         ksmbd_conn_set_good(work);
1764                         sess->state = SMB2_SESSION_VALID;
1765                         kfree(sess->Preauth_HashValue);
1766                         sess->Preauth_HashValue = NULL;
1767                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1768                         if (negblob->MessageType == NtLmNegotiate) {
1769                                 rc = ntlm_negotiate(work, negblob, negblob_len);
1770                                 if (rc)
1771                                         goto out_err;
1772                                 rsp->hdr.Status =
1773                                         STATUS_MORE_PROCESSING_REQUIRED;
1774                                 /*
1775                                  * Note: here total size -1 is done as an
1776                                  * adjustment for 0 size blob
1777                                  */
1778                                 inc_rfc1001_len(work->response_buf,
1779                                                 le16_to_cpu(rsp->SecurityBufferLength) - 1);
1780
1781                         } else if (negblob->MessageType == NtLmAuthenticate) {
1782                                 rc = ntlm_authenticate(work);
1783                                 if (rc)
1784                                         goto out_err;
1785
1786                                 ksmbd_conn_set_good(work);
1787                                 sess->state = SMB2_SESSION_VALID;
1788                                 if (conn->binding) {
1789                                         struct preauth_session *preauth_sess;
1790
1791                                         preauth_sess =
1792                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1793                                         if (preauth_sess) {
1794                                                 list_del(&preauth_sess->preauth_entry);
1795                                                 kfree(preauth_sess);
1796                                         }
1797                                 }
1798                                 kfree(sess->Preauth_HashValue);
1799                                 sess->Preauth_HashValue = NULL;
1800                         }
1801                 } else {
1802                         /* TODO: need one more negotiation */
1803                         pr_err("Not support the preferred authentication\n");
1804                         rc = -EINVAL;
1805                 }
1806         } else {
1807                 pr_err("Not support authentication\n");
1808                 rc = -EINVAL;
1809         }
1810
1811 out_err:
1812         if (rc == -EINVAL)
1813                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1814         else if (rc == -ENOENT)
1815                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1816         else if (rc == -EACCES)
1817                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1818         else if (rc == -EFAULT)
1819                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1820         else if (rc == -ENOMEM)
1821                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1822         else if (rc)
1823                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1824
1825         if (conn->use_spnego && conn->mechToken) {
1826                 kfree(conn->mechToken);
1827                 conn->mechToken = NULL;
1828         }
1829
1830         if (rc < 0) {
1831                 /*
1832                  * SecurityBufferOffset should be set to zero
1833                  * in session setup error response.
1834                  */
1835                 rsp->SecurityBufferOffset = 0;
1836
1837                 if (sess) {
1838                         bool try_delay = false;
1839
1840                         /*
1841                          * To avoid dictionary attacks (repeated session setups rapidly sent) to
1842                          * connect to server, ksmbd make a delay of a 5 seconds on session setup
1843                          * failure to make it harder to send enough random connection requests
1844                          * to break into a server.
1845                          */
1846                         if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1847                                 try_delay = true;
1848
1849                         xa_erase(&conn->sessions, sess->id);
1850                         ksmbd_session_destroy(sess);
1851                         work->sess = NULL;
1852                         if (try_delay)
1853                                 ssleep(5);
1854                 }
1855         }
1856
1857         return rc;
1858 }
1859
1860 /**
1861  * smb2_tree_connect() - handler for smb2 tree connect command
1862  * @work:       smb work containing smb request buffer
1863  *
1864  * Return:      0 on success, otherwise error
1865  */
1866 int smb2_tree_connect(struct ksmbd_work *work)
1867 {
1868         struct ksmbd_conn *conn = work->conn;
1869         struct smb2_tree_connect_req *req = smb2_get_msg(work->request_buf);
1870         struct smb2_tree_connect_rsp *rsp = smb2_get_msg(work->response_buf);
1871         struct ksmbd_session *sess = work->sess;
1872         char *treename = NULL, *name = NULL;
1873         struct ksmbd_tree_conn_status status;
1874         struct ksmbd_share_config *share;
1875         int rc = -EINVAL;
1876
1877         treename = smb_strndup_from_utf16(req->Buffer,
1878                                           le16_to_cpu(req->PathLength), true,
1879                                           conn->local_nls);
1880         if (IS_ERR(treename)) {
1881                 pr_err("treename is NULL\n");
1882                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1883                 goto out_err1;
1884         }
1885
1886         name = ksmbd_extract_sharename(conn->um, treename);
1887         if (IS_ERR(name)) {
1888                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1889                 goto out_err1;
1890         }
1891
1892         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1893                     name, treename);
1894
1895         status = ksmbd_tree_conn_connect(conn, sess, name);
1896         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1897                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1898         else
1899                 goto out_err1;
1900
1901         share = status.tree_conn->share_conf;
1902         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1903                 ksmbd_debug(SMB, "IPC share path request\n");
1904                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1905                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1906                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1907                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1908                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1909                         FILE_SYNCHRONIZE_LE;
1910         } else {
1911                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1912                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1913                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1914                 if (test_tree_conn_flag(status.tree_conn,
1915                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1916                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1917                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1918                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1919                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1920                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1921                                 FILE_SYNCHRONIZE_LE;
1922                 }
1923         }
1924
1925         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1926         if (conn->posix_ext_supported)
1927                 status.tree_conn->posix_extensions = true;
1928
1929         rsp->StructureSize = cpu_to_le16(16);
1930         inc_rfc1001_len(work->response_buf, 16);
1931 out_err1:
1932         rsp->Capabilities = 0;
1933         rsp->Reserved = 0;
1934         /* default manual caching */
1935         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
1936
1937         if (!IS_ERR(treename))
1938                 kfree(treename);
1939         if (!IS_ERR(name))
1940                 kfree(name);
1941
1942         switch (status.ret) {
1943         case KSMBD_TREE_CONN_STATUS_OK:
1944                 rsp->hdr.Status = STATUS_SUCCESS;
1945                 rc = 0;
1946                 break;
1947         case -ESTALE:
1948         case -ENOENT:
1949         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
1950                 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
1951                 break;
1952         case -ENOMEM:
1953         case KSMBD_TREE_CONN_STATUS_NOMEM:
1954                 rsp->hdr.Status = STATUS_NO_MEMORY;
1955                 break;
1956         case KSMBD_TREE_CONN_STATUS_ERROR:
1957         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
1958         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
1959                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1960                 break;
1961         case -EINVAL:
1962                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1963                 break;
1964         default:
1965                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1966         }
1967
1968         if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
1969                 smb2_set_err_rsp(work);
1970
1971         return rc;
1972 }
1973
1974 /**
1975  * smb2_create_open_flags() - convert smb open flags to unix open flags
1976  * @file_present:       is file already present
1977  * @access:             file access flags
1978  * @disposition:        file disposition flags
1979  * @may_flags:          set with MAY_ flags
1980  *
1981  * Return:      file open flags
1982  */
1983 static int smb2_create_open_flags(bool file_present, __le32 access,
1984                                   __le32 disposition,
1985                                   int *may_flags)
1986 {
1987         int oflags = O_NONBLOCK | O_LARGEFILE;
1988
1989         if (access & FILE_READ_DESIRED_ACCESS_LE &&
1990             access & FILE_WRITE_DESIRE_ACCESS_LE) {
1991                 oflags |= O_RDWR;
1992                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
1993         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
1994                 oflags |= O_WRONLY;
1995                 *may_flags = MAY_OPEN | MAY_WRITE;
1996         } else {
1997                 oflags |= O_RDONLY;
1998                 *may_flags = MAY_OPEN | MAY_READ;
1999         }
2000
2001         if (access == FILE_READ_ATTRIBUTES_LE)
2002                 oflags |= O_PATH;
2003
2004         if (file_present) {
2005                 switch (disposition & FILE_CREATE_MASK_LE) {
2006                 case FILE_OPEN_LE:
2007                 case FILE_CREATE_LE:
2008                         break;
2009                 case FILE_SUPERSEDE_LE:
2010                 case FILE_OVERWRITE_LE:
2011                 case FILE_OVERWRITE_IF_LE:
2012                         oflags |= O_TRUNC;
2013                         break;
2014                 default:
2015                         break;
2016                 }
2017         } else {
2018                 switch (disposition & FILE_CREATE_MASK_LE) {
2019                 case FILE_SUPERSEDE_LE:
2020                 case FILE_CREATE_LE:
2021                 case FILE_OPEN_IF_LE:
2022                 case FILE_OVERWRITE_IF_LE:
2023                         oflags |= O_CREAT;
2024                         break;
2025                 case FILE_OPEN_LE:
2026                 case FILE_OVERWRITE_LE:
2027                         oflags &= ~O_CREAT;
2028                         break;
2029                 default:
2030                         break;
2031                 }
2032         }
2033
2034         return oflags;
2035 }
2036
2037 /**
2038  * smb2_tree_disconnect() - handler for smb tree connect request
2039  * @work:       smb work containing request buffer
2040  *
2041  * Return:      0
2042  */
2043 int smb2_tree_disconnect(struct ksmbd_work *work)
2044 {
2045         struct smb2_tree_disconnect_rsp *rsp = smb2_get_msg(work->response_buf);
2046         struct ksmbd_session *sess = work->sess;
2047         struct ksmbd_tree_connect *tcon = work->tcon;
2048
2049         rsp->StructureSize = cpu_to_le16(4);
2050         inc_rfc1001_len(work->response_buf, 4);
2051
2052         ksmbd_debug(SMB, "request\n");
2053
2054         if (!tcon) {
2055                 struct smb2_tree_disconnect_req *req =
2056                         smb2_get_msg(work->request_buf);
2057
2058                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2059                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2060                 smb2_set_err_rsp(work);
2061                 return 0;
2062         }
2063
2064         ksmbd_close_tree_conn_fds(work);
2065         ksmbd_tree_conn_disconnect(sess, tcon);
2066         work->tcon = NULL;
2067         return 0;
2068 }
2069
2070 /**
2071  * smb2_session_logoff() - handler for session log off request
2072  * @work:       smb work containing request buffer
2073  *
2074  * Return:      0
2075  */
2076 int smb2_session_logoff(struct ksmbd_work *work)
2077 {
2078         struct ksmbd_conn *conn = work->conn;
2079         struct smb2_logoff_rsp *rsp = smb2_get_msg(work->response_buf);
2080         struct ksmbd_session *sess = work->sess;
2081
2082         rsp->StructureSize = cpu_to_le16(4);
2083         inc_rfc1001_len(work->response_buf, 4);
2084
2085         ksmbd_debug(SMB, "request\n");
2086
2087         /* setting CifsExiting here may race with start_tcp_sess */
2088         ksmbd_conn_set_need_reconnect(work);
2089         ksmbd_close_session_fds(work);
2090         ksmbd_conn_wait_idle(conn);
2091
2092         if (ksmbd_tree_conn_session_logoff(sess)) {
2093                 struct smb2_logoff_req *req = smb2_get_msg(work->request_buf);
2094
2095                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2096                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2097                 smb2_set_err_rsp(work);
2098                 return 0;
2099         }
2100
2101         ksmbd_destroy_file_table(&sess->file_table);
2102         sess->state = SMB2_SESSION_EXPIRED;
2103
2104         ksmbd_free_user(sess->user);
2105         sess->user = NULL;
2106
2107         /* let start_tcp_sess free connection info now */
2108         ksmbd_conn_set_need_negotiate(work);
2109         return 0;
2110 }
2111
2112 /**
2113  * create_smb2_pipe() - create IPC pipe
2114  * @work:       smb work containing request buffer
2115  *
2116  * Return:      0 on success, otherwise error
2117  */
2118 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2119 {
2120         struct smb2_create_rsp *rsp = smb2_get_msg(work->response_buf);
2121         struct smb2_create_req *req = smb2_get_msg(work->request_buf);
2122         int id;
2123         int err;
2124         char *name;
2125
2126         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2127                                       1, work->conn->local_nls);
2128         if (IS_ERR(name)) {
2129                 rsp->hdr.Status = STATUS_NO_MEMORY;
2130                 err = PTR_ERR(name);
2131                 goto out;
2132         }
2133
2134         id = ksmbd_session_rpc_open(work->sess, name);
2135         if (id < 0) {
2136                 pr_err("Unable to open RPC pipe: %d\n", id);
2137                 err = id;
2138                 goto out;
2139         }
2140
2141         rsp->hdr.Status = STATUS_SUCCESS;
2142         rsp->StructureSize = cpu_to_le16(89);
2143         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2144         rsp->Flags = 0;
2145         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2146
2147         rsp->CreationTime = cpu_to_le64(0);
2148         rsp->LastAccessTime = cpu_to_le64(0);
2149         rsp->ChangeTime = cpu_to_le64(0);
2150         rsp->AllocationSize = cpu_to_le64(0);
2151         rsp->EndofFile = cpu_to_le64(0);
2152         rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2153         rsp->Reserved2 = 0;
2154         rsp->VolatileFileId = id;
2155         rsp->PersistentFileId = 0;
2156         rsp->CreateContextsOffset = 0;
2157         rsp->CreateContextsLength = 0;
2158
2159         inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
2160         kfree(name);
2161         return 0;
2162
2163 out:
2164         switch (err) {
2165         case -EINVAL:
2166                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2167                 break;
2168         case -ENOSPC:
2169         case -ENOMEM:
2170                 rsp->hdr.Status = STATUS_NO_MEMORY;
2171                 break;
2172         }
2173
2174         if (!IS_ERR(name))
2175                 kfree(name);
2176
2177         smb2_set_err_rsp(work);
2178         return err;
2179 }
2180
2181 /**
2182  * smb2_set_ea() - handler for setting extended attributes using set
2183  *              info command
2184  * @eabuf:      set info command buffer
2185  * @buf_len:    set info command buffer length
2186  * @path:       dentry path for get ea
2187  *
2188  * Return:      0 on success, otherwise error
2189  */
2190 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2191                        const struct path *path)
2192 {
2193         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2194         char *attr_name = NULL, *value;
2195         int rc = 0;
2196         unsigned int next = 0;
2197
2198         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2199                         le16_to_cpu(eabuf->EaValueLength))
2200                 return -EINVAL;
2201
2202         attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2203         if (!attr_name)
2204                 return -ENOMEM;
2205
2206         do {
2207                 if (!eabuf->EaNameLength)
2208                         goto next;
2209
2210                 ksmbd_debug(SMB,
2211                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2212                             eabuf->name, eabuf->EaNameLength,
2213                             le16_to_cpu(eabuf->EaValueLength),
2214                             le32_to_cpu(eabuf->NextEntryOffset));
2215
2216                 if (eabuf->EaNameLength >
2217                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2218                         rc = -EINVAL;
2219                         break;
2220                 }
2221
2222                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2223                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2224                        eabuf->EaNameLength);
2225                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2226                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2227
2228                 if (!eabuf->EaValueLength) {
2229                         rc = ksmbd_vfs_casexattr_len(user_ns,
2230                                                      path->dentry,
2231                                                      attr_name,
2232                                                      XATTR_USER_PREFIX_LEN +
2233                                                      eabuf->EaNameLength);
2234
2235                         /* delete the EA only when it exits */
2236                         if (rc > 0) {
2237                                 rc = ksmbd_vfs_remove_xattr(user_ns,
2238                                                             path->dentry,
2239                                                             attr_name);
2240
2241                                 if (rc < 0) {
2242                                         ksmbd_debug(SMB,
2243                                                     "remove xattr failed(%d)\n",
2244                                                     rc);
2245                                         break;
2246                                 }
2247                         }
2248
2249                         /* if the EA doesn't exist, just do nothing. */
2250                         rc = 0;
2251                 } else {
2252                         rc = ksmbd_vfs_setxattr(user_ns,
2253                                                 path->dentry, attr_name, value,
2254                                                 le16_to_cpu(eabuf->EaValueLength), 0);
2255                         if (rc < 0) {
2256                                 ksmbd_debug(SMB,
2257                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2258                                             rc);
2259                                 break;
2260                         }
2261                 }
2262
2263 next:
2264                 next = le32_to_cpu(eabuf->NextEntryOffset);
2265                 if (next == 0 || buf_len < next)
2266                         break;
2267                 buf_len -= next;
2268                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2269                 if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength))
2270                         break;
2271
2272         } while (next != 0);
2273
2274         kfree(attr_name);
2275         return rc;
2276 }
2277
2278 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2279                                                struct ksmbd_file *fp,
2280                                                char *stream_name, int s_type)
2281 {
2282         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2283         size_t xattr_stream_size;
2284         char *xattr_stream_name;
2285         int rc;
2286
2287         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2288                                          &xattr_stream_name,
2289                                          &xattr_stream_size,
2290                                          s_type);
2291         if (rc)
2292                 return rc;
2293
2294         fp->stream.name = xattr_stream_name;
2295         fp->stream.size = xattr_stream_size;
2296
2297         /* Check if there is stream prefix in xattr space */
2298         rc = ksmbd_vfs_casexattr_len(user_ns,
2299                                      path->dentry,
2300                                      xattr_stream_name,
2301                                      xattr_stream_size);
2302         if (rc >= 0)
2303                 return 0;
2304
2305         if (fp->cdoption == FILE_OPEN_LE) {
2306                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2307                 return -EBADF;
2308         }
2309
2310         rc = ksmbd_vfs_setxattr(user_ns, path->dentry,
2311                                 xattr_stream_name, NULL, 0, 0);
2312         if (rc < 0)
2313                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2314         return 0;
2315 }
2316
2317 static int smb2_remove_smb_xattrs(const struct path *path)
2318 {
2319         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2320         char *name, *xattr_list = NULL;
2321         ssize_t xattr_list_len;
2322         int err = 0;
2323
2324         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2325         if (xattr_list_len < 0) {
2326                 goto out;
2327         } else if (!xattr_list_len) {
2328                 ksmbd_debug(SMB, "empty xattr in the file\n");
2329                 goto out;
2330         }
2331
2332         for (name = xattr_list; name - xattr_list < xattr_list_len;
2333                         name += strlen(name) + 1) {
2334                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2335
2336                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2337                     !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2338                              STREAM_PREFIX_LEN)) {
2339                         err = ksmbd_vfs_remove_xattr(user_ns, path->dentry,
2340                                                      name);
2341                         if (err)
2342                                 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2343                                             name);
2344                 }
2345         }
2346 out:
2347         kvfree(xattr_list);
2348         return err;
2349 }
2350
2351 static int smb2_create_truncate(const struct path *path)
2352 {
2353         int rc = vfs_truncate(path, 0);
2354
2355         if (rc) {
2356                 pr_err("vfs_truncate failed, rc %d\n", rc);
2357                 return rc;
2358         }
2359
2360         rc = smb2_remove_smb_xattrs(path);
2361         if (rc == -EOPNOTSUPP)
2362                 rc = 0;
2363         if (rc)
2364                 ksmbd_debug(SMB,
2365                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2366                             rc);
2367         return rc;
2368 }
2369
2370 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2371                             struct ksmbd_file *fp)
2372 {
2373         struct xattr_dos_attrib da = {0};
2374         int rc;
2375
2376         if (!test_share_config_flag(tcon->share_conf,
2377                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2378                 return;
2379
2380         da.version = 4;
2381         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2382         da.itime = da.create_time = fp->create_time;
2383         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2384                 XATTR_DOSINFO_ITIME;
2385
2386         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_user_ns(path->mnt),
2387                                             path->dentry, &da);
2388         if (rc)
2389                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2390 }
2391
2392 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2393                                const struct path *path, struct ksmbd_file *fp)
2394 {
2395         struct xattr_dos_attrib da;
2396         int rc;
2397
2398         fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2399
2400         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2401         if (!test_share_config_flag(tcon->share_conf,
2402                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2403                 return;
2404
2405         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_user_ns(path->mnt),
2406                                             path->dentry, &da);
2407         if (rc > 0) {
2408                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2409                 fp->create_time = da.create_time;
2410                 fp->itime = da.itime;
2411         }
2412 }
2413
2414 static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name,
2415                       int open_flags, umode_t posix_mode, bool is_dir)
2416 {
2417         struct ksmbd_tree_connect *tcon = work->tcon;
2418         struct ksmbd_share_config *share = tcon->share_conf;
2419         umode_t mode;
2420         int rc;
2421
2422         if (!(open_flags & O_CREAT))
2423                 return -EBADF;
2424
2425         ksmbd_debug(SMB, "file does not exist, so creating\n");
2426         if (is_dir == true) {
2427                 ksmbd_debug(SMB, "creating directory\n");
2428
2429                 mode = share_config_directory_mode(share, posix_mode);
2430                 rc = ksmbd_vfs_mkdir(work, name, mode);
2431                 if (rc)
2432                         return rc;
2433         } else {
2434                 ksmbd_debug(SMB, "creating regular file\n");
2435
2436                 mode = share_config_create_mode(share, posix_mode);
2437                 rc = ksmbd_vfs_create(work, name, mode);
2438                 if (rc)
2439                         return rc;
2440         }
2441
2442         rc = ksmbd_vfs_kern_path(work, name, 0, path, 0);
2443         if (rc) {
2444                 pr_err("cannot get linux path (%s), err = %d\n",
2445                        name, rc);
2446                 return rc;
2447         }
2448         return 0;
2449 }
2450
2451 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2452                                  struct smb2_create_req *req,
2453                                  const struct path *path)
2454 {
2455         struct create_context *context;
2456         struct create_sd_buf_req *sd_buf;
2457
2458         if (!req->CreateContextsOffset)
2459                 return -ENOENT;
2460
2461         /* Parse SD BUFFER create contexts */
2462         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER);
2463         if (!context)
2464                 return -ENOENT;
2465         else if (IS_ERR(context))
2466                 return PTR_ERR(context);
2467
2468         ksmbd_debug(SMB,
2469                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2470         sd_buf = (struct create_sd_buf_req *)context;
2471         if (le16_to_cpu(context->DataOffset) +
2472             le32_to_cpu(context->DataLength) <
2473             sizeof(struct create_sd_buf_req))
2474                 return -EINVAL;
2475         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2476                             le32_to_cpu(sd_buf->ccontext.DataLength), true);
2477 }
2478
2479 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2480                              struct user_namespace *mnt_userns,
2481                              struct inode *inode)
2482 {
2483         vfsuid_t vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
2484         vfsgid_t vfsgid = i_gid_into_vfsgid(mnt_userns, inode);
2485
2486         fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2487         fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2488         fattr->cf_mode = inode->i_mode;
2489         fattr->cf_acls = NULL;
2490         fattr->cf_dacls = NULL;
2491
2492         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2493                 fattr->cf_acls = get_acl(inode, ACL_TYPE_ACCESS);
2494                 if (S_ISDIR(inode->i_mode))
2495                         fattr->cf_dacls = get_acl(inode, ACL_TYPE_DEFAULT);
2496         }
2497 }
2498
2499 /**
2500  * smb2_open() - handler for smb file open request
2501  * @work:       smb work containing request buffer
2502  *
2503  * Return:      0 on success, otherwise error
2504  */
2505 int smb2_open(struct ksmbd_work *work)
2506 {
2507         struct ksmbd_conn *conn = work->conn;
2508         struct ksmbd_session *sess = work->sess;
2509         struct ksmbd_tree_connect *tcon = work->tcon;
2510         struct smb2_create_req *req;
2511         struct smb2_create_rsp *rsp;
2512         struct path path;
2513         struct ksmbd_share_config *share = tcon->share_conf;
2514         struct ksmbd_file *fp = NULL;
2515         struct file *filp = NULL;
2516         struct user_namespace *user_ns = NULL;
2517         struct kstat stat;
2518         struct create_context *context;
2519         struct lease_ctx_info *lc = NULL;
2520         struct create_ea_buf_req *ea_buf = NULL;
2521         struct oplock_info *opinfo;
2522         __le32 *next_ptr = NULL;
2523         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2524         int rc = 0;
2525         int contxt_cnt = 0, query_disk_id = 0;
2526         int maximal_access_ctxt = 0, posix_ctxt = 0;
2527         int s_type = 0;
2528         int next_off = 0;
2529         char *name = NULL;
2530         char *stream_name = NULL;
2531         bool file_present = false, created = false, already_permitted = false;
2532         int share_ret, need_truncate = 0;
2533         u64 time;
2534         umode_t posix_mode = 0;
2535         __le32 daccess, maximal_access = 0;
2536
2537         WORK_BUFFERS(work, req, rsp);
2538
2539         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2540             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2541                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2542                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2543                 smb2_set_err_rsp(work);
2544                 return -EINVAL;
2545         }
2546
2547         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2548                 ksmbd_debug(SMB, "IPC pipe create request\n");
2549                 return create_smb2_pipe(work);
2550         }
2551
2552         if (req->NameLength) {
2553                 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2554                     *(char *)req->Buffer == '\\') {
2555                         pr_err("not allow directory name included leading slash\n");
2556                         rc = -EINVAL;
2557                         goto err_out1;
2558                 }
2559
2560                 name = smb2_get_name(req->Buffer,
2561                                      le16_to_cpu(req->NameLength),
2562                                      work->conn->local_nls);
2563                 if (IS_ERR(name)) {
2564                         rc = PTR_ERR(name);
2565                         if (rc != -ENOMEM)
2566                                 rc = -ENOENT;
2567                         name = NULL;
2568                         goto err_out1;
2569                 }
2570
2571                 ksmbd_debug(SMB, "converted name = %s\n", name);
2572                 if (strchr(name, ':')) {
2573                         if (!test_share_config_flag(work->tcon->share_conf,
2574                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2575                                 rc = -EBADF;
2576                                 goto err_out1;
2577                         }
2578                         rc = parse_stream_name(name, &stream_name, &s_type);
2579                         if (rc < 0)
2580                                 goto err_out1;
2581                 }
2582
2583                 rc = ksmbd_validate_filename(name);
2584                 if (rc < 0)
2585                         goto err_out1;
2586
2587                 if (ksmbd_share_veto_filename(share, name)) {
2588                         rc = -ENOENT;
2589                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2590                                     name);
2591                         goto err_out1;
2592                 }
2593         } else {
2594                 name = kstrdup("", GFP_KERNEL);
2595                 if (!name) {
2596                         rc = -ENOMEM;
2597                         goto err_out1;
2598                 }
2599         }
2600
2601         req_op_level = req->RequestedOplockLevel;
2602         if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2603                 lc = parse_lease_state(req);
2604
2605         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2606                 pr_err("Invalid impersonationlevel : 0x%x\n",
2607                        le32_to_cpu(req->ImpersonationLevel));
2608                 rc = -EIO;
2609                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2610                 goto err_out1;
2611         }
2612
2613         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2614                 pr_err("Invalid create options : 0x%x\n",
2615                        le32_to_cpu(req->CreateOptions));
2616                 rc = -EINVAL;
2617                 goto err_out1;
2618         } else {
2619                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2620                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2621                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2622
2623                 if (req->CreateOptions &
2624                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2625                      FILE_RESERVE_OPFILTER_LE)) {
2626                         rc = -EOPNOTSUPP;
2627                         goto err_out1;
2628                 }
2629
2630                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2631                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2632                                 rc = -EINVAL;
2633                                 goto err_out1;
2634                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2635                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2636                         }
2637                 }
2638         }
2639
2640         if (le32_to_cpu(req->CreateDisposition) >
2641             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2642                 pr_err("Invalid create disposition : 0x%x\n",
2643                        le32_to_cpu(req->CreateDisposition));
2644                 rc = -EINVAL;
2645                 goto err_out1;
2646         }
2647
2648         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2649                 pr_err("Invalid desired access : 0x%x\n",
2650                        le32_to_cpu(req->DesiredAccess));
2651                 rc = -EACCES;
2652                 goto err_out1;
2653         }
2654
2655         if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2656                 pr_err("Invalid file attribute : 0x%x\n",
2657                        le32_to_cpu(req->FileAttributes));
2658                 rc = -EINVAL;
2659                 goto err_out1;
2660         }
2661
2662         if (req->CreateContextsOffset) {
2663                 /* Parse non-durable handle create contexts */
2664                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER);
2665                 if (IS_ERR(context)) {
2666                         rc = PTR_ERR(context);
2667                         goto err_out1;
2668                 } else if (context) {
2669                         ea_buf = (struct create_ea_buf_req *)context;
2670                         if (le16_to_cpu(context->DataOffset) +
2671                             le32_to_cpu(context->DataLength) <
2672                             sizeof(struct create_ea_buf_req)) {
2673                                 rc = -EINVAL;
2674                                 goto err_out1;
2675                         }
2676                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2677                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2678                                 rc = -EACCES;
2679                                 goto err_out1;
2680                         }
2681                 }
2682
2683                 context = smb2_find_context_vals(req,
2684                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST);
2685                 if (IS_ERR(context)) {
2686                         rc = PTR_ERR(context);
2687                         goto err_out1;
2688                 } else if (context) {
2689                         ksmbd_debug(SMB,
2690                                     "get query maximal access context\n");
2691                         maximal_access_ctxt = 1;
2692                 }
2693
2694                 context = smb2_find_context_vals(req,
2695                                                  SMB2_CREATE_TIMEWARP_REQUEST);
2696                 if (IS_ERR(context)) {
2697                         rc = PTR_ERR(context);
2698                         goto err_out1;
2699                 } else if (context) {
2700                         ksmbd_debug(SMB, "get timewarp context\n");
2701                         rc = -EBADF;
2702                         goto err_out1;
2703                 }
2704
2705                 if (tcon->posix_extensions) {
2706                         context = smb2_find_context_vals(req,
2707                                                          SMB2_CREATE_TAG_POSIX);
2708                         if (IS_ERR(context)) {
2709                                 rc = PTR_ERR(context);
2710                                 goto err_out1;
2711                         } else if (context) {
2712                                 struct create_posix *posix =
2713                                         (struct create_posix *)context;
2714                                 if (le16_to_cpu(context->DataOffset) +
2715                                     le32_to_cpu(context->DataLength) <
2716                                     sizeof(struct create_posix) - 4) {
2717                                         rc = -EINVAL;
2718                                         goto err_out1;
2719                                 }
2720                                 ksmbd_debug(SMB, "get posix context\n");
2721
2722                                 posix_mode = le32_to_cpu(posix->Mode);
2723                                 posix_ctxt = 1;
2724                         }
2725                 }
2726         }
2727
2728         if (ksmbd_override_fsids(work)) {
2729                 rc = -ENOMEM;
2730                 goto err_out1;
2731         }
2732
2733         rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1);
2734         if (!rc) {
2735                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2736                         /*
2737                          * If file exists with under flags, return access
2738                          * denied error.
2739                          */
2740                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2741                             req->CreateDisposition == FILE_OPEN_IF_LE) {
2742                                 rc = -EACCES;
2743                                 path_put(&path);
2744                                 goto err_out;
2745                         }
2746
2747                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2748                                 ksmbd_debug(SMB,
2749                                             "User does not have write permission\n");
2750                                 rc = -EACCES;
2751                                 path_put(&path);
2752                                 goto err_out;
2753                         }
2754                 } else if (d_is_symlink(path.dentry)) {
2755                         rc = -EACCES;
2756                         path_put(&path);
2757                         goto err_out;
2758                 }
2759         }
2760
2761         if (rc) {
2762                 if (rc != -ENOENT)
2763                         goto err_out;
2764                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2765                             name, rc);
2766                 rc = 0;
2767         } else {
2768                 file_present = true;
2769                 user_ns = mnt_user_ns(path.mnt);
2770         }
2771         if (stream_name) {
2772                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2773                         if (s_type == DATA_STREAM) {
2774                                 rc = -EIO;
2775                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2776                         }
2777                 } else {
2778                         if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
2779                             s_type == DATA_STREAM) {
2780                                 rc = -EIO;
2781                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2782                         }
2783                 }
2784
2785                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2786                     req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2787                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2788                         rc = -EIO;
2789                 }
2790
2791                 if (rc < 0)
2792                         goto err_out;
2793         }
2794
2795         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2796             S_ISDIR(d_inode(path.dentry)->i_mode) &&
2797             !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2798                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2799                             name, req->CreateOptions);
2800                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2801                 rc = -EIO;
2802                 goto err_out;
2803         }
2804
2805         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2806             !(req->CreateDisposition == FILE_CREATE_LE) &&
2807             !S_ISDIR(d_inode(path.dentry)->i_mode)) {
2808                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2809                 rc = -EIO;
2810                 goto err_out;
2811         }
2812
2813         if (!stream_name && file_present &&
2814             req->CreateDisposition == FILE_CREATE_LE) {
2815                 rc = -EEXIST;
2816                 goto err_out;
2817         }
2818
2819         daccess = smb_map_generic_desired_access(req->DesiredAccess);
2820
2821         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2822                 rc = smb_check_perm_dacl(conn, &path, &daccess,
2823                                          sess->user->uid);
2824                 if (rc)
2825                         goto err_out;
2826         }
2827
2828         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2829                 if (!file_present) {
2830                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2831                 } else {
2832                         rc = ksmbd_vfs_query_maximal_access(user_ns,
2833                                                             path.dentry,
2834                                                             &daccess);
2835                         if (rc)
2836                                 goto err_out;
2837                         already_permitted = true;
2838                 }
2839                 maximal_access = daccess;
2840         }
2841
2842         open_flags = smb2_create_open_flags(file_present, daccess,
2843                                             req->CreateDisposition,
2844                                             &may_flags);
2845
2846         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2847                 if (open_flags & O_CREAT) {
2848                         ksmbd_debug(SMB,
2849                                     "User does not have write permission\n");
2850                         rc = -EACCES;
2851                         goto err_out;
2852                 }
2853         }
2854
2855         /*create file if not present */
2856         if (!file_present) {
2857                 rc = smb2_creat(work, &path, name, open_flags, posix_mode,
2858                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2859                 if (rc) {
2860                         if (rc == -ENOENT) {
2861                                 rc = -EIO;
2862                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2863                         }
2864                         goto err_out;
2865                 }
2866
2867                 created = true;
2868                 user_ns = mnt_user_ns(path.mnt);
2869                 if (ea_buf) {
2870                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
2871                             sizeof(struct smb2_ea_info)) {
2872                                 rc = -EINVAL;
2873                                 goto err_out;
2874                         }
2875
2876                         rc = smb2_set_ea(&ea_buf->ea,
2877                                          le32_to_cpu(ea_buf->ccontext.DataLength),
2878                                          &path);
2879                         if (rc == -EOPNOTSUPP)
2880                                 rc = 0;
2881                         else if (rc)
2882                                 goto err_out;
2883                 }
2884         } else if (!already_permitted) {
2885                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
2886                  * because execute(search) permission on a parent directory,
2887                  * is already granted.
2888                  */
2889                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
2890                         rc = inode_permission(user_ns,
2891                                               d_inode(path.dentry),
2892                                               may_flags);
2893                         if (rc)
2894                                 goto err_out;
2895
2896                         if ((daccess & FILE_DELETE_LE) ||
2897                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2898                                 rc = ksmbd_vfs_may_delete(user_ns,
2899                                                           path.dentry);
2900                                 if (rc)
2901                                         goto err_out;
2902                         }
2903                 }
2904         }
2905
2906         rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
2907         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
2908                 rc = -EBUSY;
2909                 goto err_out;
2910         }
2911
2912         rc = 0;
2913         filp = dentry_open(&path, open_flags, current_cred());
2914         if (IS_ERR(filp)) {
2915                 rc = PTR_ERR(filp);
2916                 pr_err("dentry open for dir failed, rc %d\n", rc);
2917                 goto err_out;
2918         }
2919
2920         if (file_present) {
2921                 if (!(open_flags & O_TRUNC))
2922                         file_info = FILE_OPENED;
2923                 else
2924                         file_info = FILE_OVERWRITTEN;
2925
2926                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
2927                     FILE_SUPERSEDE_LE)
2928                         file_info = FILE_SUPERSEDED;
2929         } else if (open_flags & O_CREAT) {
2930                 file_info = FILE_CREATED;
2931         }
2932
2933         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
2934
2935         /* Obtain Volatile-ID */
2936         fp = ksmbd_open_fd(work, filp);
2937         if (IS_ERR(fp)) {
2938                 fput(filp);
2939                 rc = PTR_ERR(fp);
2940                 fp = NULL;
2941                 goto err_out;
2942         }
2943
2944         /* Get Persistent-ID */
2945         ksmbd_open_durable_fd(fp);
2946         if (!has_file_id(fp->persistent_id)) {
2947                 rc = -ENOMEM;
2948                 goto err_out;
2949         }
2950
2951         fp->cdoption = req->CreateDisposition;
2952         fp->daccess = daccess;
2953         fp->saccess = req->ShareAccess;
2954         fp->coption = req->CreateOptions;
2955
2956         /* Set default windows and posix acls if creating new file */
2957         if (created) {
2958                 int posix_acl_rc;
2959                 struct inode *inode = d_inode(path.dentry);
2960
2961                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(user_ns,
2962                                                            inode,
2963                                                            d_inode(path.dentry->d_parent));
2964                 if (posix_acl_rc)
2965                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
2966
2967                 if (test_share_config_flag(work->tcon->share_conf,
2968                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
2969                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
2970                                               sess->user->gid);
2971                 }
2972
2973                 if (rc) {
2974                         rc = smb2_create_sd_buffer(work, req, &path);
2975                         if (rc) {
2976                                 if (posix_acl_rc)
2977                                         ksmbd_vfs_set_init_posix_acl(user_ns,
2978                                                                      inode);
2979
2980                                 if (test_share_config_flag(work->tcon->share_conf,
2981                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
2982                                         struct smb_fattr fattr;
2983                                         struct smb_ntsd *pntsd;
2984                                         int pntsd_size, ace_num = 0;
2985
2986                                         ksmbd_acls_fattr(&fattr, user_ns, inode);
2987                                         if (fattr.cf_acls)
2988                                                 ace_num = fattr.cf_acls->a_count;
2989                                         if (fattr.cf_dacls)
2990                                                 ace_num += fattr.cf_dacls->a_count;
2991
2992                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
2993                                                         sizeof(struct smb_sid) * 3 +
2994                                                         sizeof(struct smb_acl) +
2995                                                         sizeof(struct smb_ace) * ace_num * 2,
2996                                                         GFP_KERNEL);
2997                                         if (!pntsd)
2998                                                 goto err_out;
2999
3000                                         rc = build_sec_desc(user_ns,
3001                                                             pntsd, NULL, 0,
3002                                                             OWNER_SECINFO |
3003                                                             GROUP_SECINFO |
3004                                                             DACL_SECINFO,
3005                                                             &pntsd_size, &fattr);
3006                                         posix_acl_release(fattr.cf_acls);
3007                                         posix_acl_release(fattr.cf_dacls);
3008                                         if (rc) {
3009                                                 kfree(pntsd);
3010                                                 goto err_out;
3011                                         }
3012
3013                                         rc = ksmbd_vfs_set_sd_xattr(conn,
3014                                                                     user_ns,
3015                                                                     path.dentry,
3016                                                                     pntsd,
3017                                                                     pntsd_size);
3018                                         kfree(pntsd);
3019                                         if (rc)
3020                                                 pr_err("failed to store ntacl in xattr : %d\n",
3021                                                        rc);
3022                                 }
3023                         }
3024                 }
3025                 rc = 0;
3026         }
3027
3028         if (stream_name) {
3029                 rc = smb2_set_stream_name_xattr(&path,
3030                                                 fp,
3031                                                 stream_name,
3032                                                 s_type);
3033                 if (rc)
3034                         goto err_out;
3035                 file_info = FILE_CREATED;
3036         }
3037
3038         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3039                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3040         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3041             !fp->attrib_only && !stream_name) {
3042                 smb_break_all_oplock(work, fp);
3043                 need_truncate = 1;
3044         }
3045
3046         /* fp should be searchable through ksmbd_inode.m_fp_list
3047          * after daccess, saccess, attrib_only, and stream are
3048          * initialized.
3049          */
3050         write_lock(&fp->f_ci->m_lock);
3051         list_add(&fp->node, &fp->f_ci->m_fp_list);
3052         write_unlock(&fp->f_ci->m_lock);
3053
3054         /* Check delete pending among previous fp before oplock break */
3055         if (ksmbd_inode_pending_delete(fp)) {
3056                 rc = -EBUSY;
3057                 goto err_out;
3058         }
3059
3060         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3061         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3062             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3063              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3064                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3065                         rc = share_ret;
3066                         goto err_out;
3067                 }
3068         } else {
3069                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3070                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3071                         ksmbd_debug(SMB,
3072                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3073                                     name, req_op_level, lc->req_state);
3074                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3075                         if (rc)
3076                                 goto err_out;
3077                 } else if (open_flags == O_RDONLY &&
3078                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3079                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3080                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3081
3082                 rc = smb_grant_oplock(work, req_op_level,
3083                                       fp->persistent_id, fp,
3084                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3085                                       lc, share_ret);
3086                 if (rc < 0)
3087                         goto err_out;
3088         }
3089
3090         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3091                 ksmbd_fd_set_delete_on_close(fp, file_info);
3092
3093         if (need_truncate) {
3094                 rc = smb2_create_truncate(&path);
3095                 if (rc)
3096                         goto err_out;
3097         }
3098
3099         if (req->CreateContextsOffset) {
3100                 struct create_alloc_size_req *az_req;
3101
3102                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3103                                         SMB2_CREATE_ALLOCATION_SIZE);
3104                 if (IS_ERR(az_req)) {
3105                         rc = PTR_ERR(az_req);
3106                         goto err_out;
3107                 } else if (az_req) {
3108                         loff_t alloc_size;
3109                         int err;
3110
3111                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3112                             le32_to_cpu(az_req->ccontext.DataLength) <
3113                             sizeof(struct create_alloc_size_req)) {
3114                                 rc = -EINVAL;
3115                                 goto err_out;
3116                         }
3117                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3118                         ksmbd_debug(SMB,
3119                                     "request smb2 create allocate size : %llu\n",
3120                                     alloc_size);
3121                         smb_break_all_levII_oplock(work, fp, 1);
3122                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3123                                             alloc_size);
3124                         if (err < 0)
3125                                 ksmbd_debug(SMB,
3126                                             "vfs_fallocate is failed : %d\n",
3127                                             err);
3128                 }
3129
3130                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID);
3131                 if (IS_ERR(context)) {
3132                         rc = PTR_ERR(context);
3133                         goto err_out;
3134                 } else if (context) {
3135                         ksmbd_debug(SMB, "get query on disk id context\n");
3136                         query_disk_id = 1;
3137                 }
3138         }
3139
3140         rc = ksmbd_vfs_getattr(&path, &stat);
3141         if (rc)
3142                 goto err_out;
3143
3144         if (stat.result_mask & STATX_BTIME)
3145                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3146         else
3147                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3148         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3149                 fp->f_ci->m_fattr =
3150                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3151
3152         if (!created)
3153                 smb2_update_xattrs(tcon, &path, fp);
3154         else
3155                 smb2_new_xattrs(tcon, &path, fp);
3156
3157         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3158
3159         rsp->StructureSize = cpu_to_le16(89);
3160         rcu_read_lock();
3161         opinfo = rcu_dereference(fp->f_opinfo);
3162         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3163         rcu_read_unlock();
3164         rsp->Flags = 0;
3165         rsp->CreateAction = cpu_to_le32(file_info);
3166         rsp->CreationTime = cpu_to_le64(fp->create_time);
3167         time = ksmbd_UnixTimeToNT(stat.atime);
3168         rsp->LastAccessTime = cpu_to_le64(time);
3169         time = ksmbd_UnixTimeToNT(stat.mtime);
3170         rsp->LastWriteTime = cpu_to_le64(time);
3171         time = ksmbd_UnixTimeToNT(stat.ctime);
3172         rsp->ChangeTime = cpu_to_le64(time);
3173         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3174                 cpu_to_le64(stat.blocks << 9);
3175         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3176         rsp->FileAttributes = fp->f_ci->m_fattr;
3177
3178         rsp->Reserved2 = 0;
3179
3180         rsp->PersistentFileId = fp->persistent_id;
3181         rsp->VolatileFileId = fp->volatile_id;
3182
3183         rsp->CreateContextsOffset = 0;
3184         rsp->CreateContextsLength = 0;
3185         inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
3186
3187         /* If lease is request send lease context response */
3188         if (opinfo && opinfo->is_lease) {
3189                 struct create_context *lease_ccontext;
3190
3191                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3192                             name, opinfo->o_lease->state);
3193                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3194
3195                 lease_ccontext = (struct create_context *)rsp->Buffer;
3196                 contxt_cnt++;
3197                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3198                 le32_add_cpu(&rsp->CreateContextsLength,
3199                              conn->vals->create_lease_size);
3200                 inc_rfc1001_len(work->response_buf,
3201                                 conn->vals->create_lease_size);
3202                 next_ptr = &lease_ccontext->Next;
3203                 next_off = conn->vals->create_lease_size;
3204         }
3205
3206         if (maximal_access_ctxt) {
3207                 struct create_context *mxac_ccontext;
3208
3209                 if (maximal_access == 0)
3210                         ksmbd_vfs_query_maximal_access(user_ns,
3211                                                        path.dentry,
3212                                                        &maximal_access);
3213                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3214                                 le32_to_cpu(rsp->CreateContextsLength));
3215                 contxt_cnt++;
3216                 create_mxac_rsp_buf(rsp->Buffer +
3217                                 le32_to_cpu(rsp->CreateContextsLength),
3218                                 le32_to_cpu(maximal_access));
3219                 le32_add_cpu(&rsp->CreateContextsLength,
3220                              conn->vals->create_mxac_size);
3221                 inc_rfc1001_len(work->response_buf,
3222                                 conn->vals->create_mxac_size);
3223                 if (next_ptr)
3224                         *next_ptr = cpu_to_le32(next_off);
3225                 next_ptr = &mxac_ccontext->Next;
3226                 next_off = conn->vals->create_mxac_size;
3227         }
3228
3229         if (query_disk_id) {
3230                 struct create_context *disk_id_ccontext;
3231
3232                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3233                                 le32_to_cpu(rsp->CreateContextsLength));
3234                 contxt_cnt++;
3235                 create_disk_id_rsp_buf(rsp->Buffer +
3236                                 le32_to_cpu(rsp->CreateContextsLength),
3237                                 stat.ino, tcon->id);
3238                 le32_add_cpu(&rsp->CreateContextsLength,
3239                              conn->vals->create_disk_id_size);
3240                 inc_rfc1001_len(work->response_buf,
3241                                 conn->vals->create_disk_id_size);
3242                 if (next_ptr)
3243                         *next_ptr = cpu_to_le32(next_off);
3244                 next_ptr = &disk_id_ccontext->Next;
3245                 next_off = conn->vals->create_disk_id_size;
3246         }
3247
3248         if (posix_ctxt) {
3249                 contxt_cnt++;
3250                 create_posix_rsp_buf(rsp->Buffer +
3251                                 le32_to_cpu(rsp->CreateContextsLength),
3252                                 fp);
3253                 le32_add_cpu(&rsp->CreateContextsLength,
3254                              conn->vals->create_posix_size);
3255                 inc_rfc1001_len(work->response_buf,
3256                                 conn->vals->create_posix_size);
3257                 if (next_ptr)
3258                         *next_ptr = cpu_to_le32(next_off);
3259         }
3260
3261         if (contxt_cnt > 0) {
3262                 rsp->CreateContextsOffset =
3263                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3264         }
3265
3266 err_out:
3267         if (file_present || created)
3268                 path_put(&path);
3269         ksmbd_revert_fsids(work);
3270 err_out1:
3271         if (rc) {
3272                 if (rc == -EINVAL)
3273                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3274                 else if (rc == -EOPNOTSUPP)
3275                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3276                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3277                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3278                 else if (rc == -ENOENT)
3279                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3280                 else if (rc == -EPERM)
3281                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3282                 else if (rc == -EBUSY)
3283                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3284                 else if (rc == -EBADF)
3285                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3286                 else if (rc == -ENOEXEC)
3287                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3288                 else if (rc == -ENXIO)
3289                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3290                 else if (rc == -EEXIST)
3291                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3292                 else if (rc == -EMFILE)
3293                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3294                 if (!rsp->hdr.Status)
3295                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3296
3297                 if (fp)
3298                         ksmbd_fd_put(work, fp);
3299                 smb2_set_err_rsp(work);
3300                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3301         }
3302
3303         kfree(name);
3304         kfree(lc);
3305
3306         return 0;
3307 }
3308
3309 static int readdir_info_level_struct_sz(int info_level)
3310 {
3311         switch (info_level) {
3312         case FILE_FULL_DIRECTORY_INFORMATION:
3313                 return sizeof(struct file_full_directory_info);
3314         case FILE_BOTH_DIRECTORY_INFORMATION:
3315                 return sizeof(struct file_both_directory_info);
3316         case FILE_DIRECTORY_INFORMATION:
3317                 return sizeof(struct file_directory_info);
3318         case FILE_NAMES_INFORMATION:
3319                 return sizeof(struct file_names_info);
3320         case FILEID_FULL_DIRECTORY_INFORMATION:
3321                 return sizeof(struct file_id_full_dir_info);
3322         case FILEID_BOTH_DIRECTORY_INFORMATION:
3323                 return sizeof(struct file_id_both_directory_info);
3324         case SMB_FIND_FILE_POSIX_INFO:
3325                 return sizeof(struct smb2_posix_info);
3326         default:
3327                 return -EOPNOTSUPP;
3328         }
3329 }
3330
3331 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3332 {
3333         switch (info_level) {
3334         case FILE_FULL_DIRECTORY_INFORMATION:
3335         {
3336                 struct file_full_directory_info *ffdinfo;
3337
3338                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3339                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3340                 d_info->name = ffdinfo->FileName;
3341                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3342                 return 0;
3343         }
3344         case FILE_BOTH_DIRECTORY_INFORMATION:
3345         {
3346                 struct file_both_directory_info *fbdinfo;
3347
3348                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3349                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3350                 d_info->name = fbdinfo->FileName;
3351                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3352                 return 0;
3353         }
3354         case FILE_DIRECTORY_INFORMATION:
3355         {
3356                 struct file_directory_info *fdinfo;
3357
3358                 fdinfo = (struct file_directory_info *)d_info->rptr;
3359                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3360                 d_info->name = fdinfo->FileName;
3361                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3362                 return 0;
3363         }
3364         case FILE_NAMES_INFORMATION:
3365         {
3366                 struct file_names_info *fninfo;
3367
3368                 fninfo = (struct file_names_info *)d_info->rptr;
3369                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3370                 d_info->name = fninfo->FileName;
3371                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3372                 return 0;
3373         }
3374         case FILEID_FULL_DIRECTORY_INFORMATION:
3375         {
3376                 struct file_id_full_dir_info *dinfo;
3377
3378                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3379                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3380                 d_info->name = dinfo->FileName;
3381                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3382                 return 0;
3383         }
3384         case FILEID_BOTH_DIRECTORY_INFORMATION:
3385         {
3386                 struct file_id_both_directory_info *fibdinfo;
3387
3388                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3389                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3390                 d_info->name = fibdinfo->FileName;
3391                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3392                 return 0;
3393         }
3394         case SMB_FIND_FILE_POSIX_INFO:
3395         {
3396                 struct smb2_posix_info *posix_info;
3397
3398                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3399                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3400                 d_info->name = posix_info->name;
3401                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3402                 return 0;
3403         }
3404         default:
3405                 return -EINVAL;
3406         }
3407 }
3408
3409 /**
3410  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3411  * buffer
3412  * @conn:       connection instance
3413  * @info_level: smb information level
3414  * @d_info:     structure included variables for query dir
3415  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3416  *
3417  * if directory has many entries, find first can't read it fully.
3418  * find next might be called multiple times to read remaining dir entries
3419  *
3420  * Return:      0 on success, otherwise error
3421  */
3422 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3423                                        struct ksmbd_dir_info *d_info,
3424                                        struct ksmbd_kstat *ksmbd_kstat)
3425 {
3426         int next_entry_offset = 0;
3427         char *conv_name;
3428         int conv_len;
3429         void *kstat;
3430         int struct_sz, rc = 0;
3431
3432         conv_name = ksmbd_convert_dir_info_name(d_info,
3433                                                 conn->local_nls,
3434                                                 &conv_len);
3435         if (!conv_name)
3436                 return -ENOMEM;
3437
3438         /* Somehow the name has only terminating NULL bytes */
3439         if (conv_len < 0) {
3440                 rc = -EINVAL;
3441                 goto free_conv_name;
3442         }
3443
3444         struct_sz = readdir_info_level_struct_sz(info_level) - 1 + conv_len;
3445         next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3446         d_info->last_entry_off_align = next_entry_offset - struct_sz;
3447
3448         if (next_entry_offset > d_info->out_buf_len) {
3449                 d_info->out_buf_len = 0;
3450                 rc = -ENOSPC;
3451                 goto free_conv_name;
3452         }
3453
3454         kstat = d_info->wptr;
3455         if (info_level != FILE_NAMES_INFORMATION)
3456                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3457
3458         switch (info_level) {
3459         case FILE_FULL_DIRECTORY_INFORMATION:
3460         {
3461                 struct file_full_directory_info *ffdinfo;
3462
3463                 ffdinfo = (struct file_full_directory_info *)kstat;
3464                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3465                 ffdinfo->EaSize =
3466                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3467                 if (ffdinfo->EaSize)
3468                         ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3469                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3470                         ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3471                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3472                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3473                 break;
3474         }
3475         case FILE_BOTH_DIRECTORY_INFORMATION:
3476         {
3477                 struct file_both_directory_info *fbdinfo;
3478
3479                 fbdinfo = (struct file_both_directory_info *)kstat;
3480                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3481                 fbdinfo->EaSize =
3482                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3483                 if (fbdinfo->EaSize)
3484                         fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3485                 fbdinfo->ShortNameLength = 0;
3486                 fbdinfo->Reserved = 0;
3487                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3488                         fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3489                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3490                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3491                 break;
3492         }
3493         case FILE_DIRECTORY_INFORMATION:
3494         {
3495                 struct file_directory_info *fdinfo;
3496
3497                 fdinfo = (struct file_directory_info *)kstat;
3498                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3499                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3500                         fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3501                 memcpy(fdinfo->FileName, conv_name, conv_len);
3502                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3503                 break;
3504         }
3505         case FILE_NAMES_INFORMATION:
3506         {
3507                 struct file_names_info *fninfo;
3508
3509                 fninfo = (struct file_names_info *)kstat;
3510                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3511                 memcpy(fninfo->FileName, conv_name, conv_len);
3512                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3513                 break;
3514         }
3515         case FILEID_FULL_DIRECTORY_INFORMATION:
3516         {
3517                 struct file_id_full_dir_info *dinfo;
3518
3519                 dinfo = (struct file_id_full_dir_info *)kstat;
3520                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3521                 dinfo->EaSize =
3522                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3523                 if (dinfo->EaSize)
3524                         dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3525                 dinfo->Reserved = 0;
3526                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3527                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3528                         dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3529                 memcpy(dinfo->FileName, conv_name, conv_len);
3530                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3531                 break;
3532         }
3533         case FILEID_BOTH_DIRECTORY_INFORMATION:
3534         {
3535                 struct file_id_both_directory_info *fibdinfo;
3536
3537                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3538                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3539                 fibdinfo->EaSize =
3540                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3541                 if (fibdinfo->EaSize)
3542                         fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3543                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3544                 fibdinfo->ShortNameLength = 0;
3545                 fibdinfo->Reserved = 0;
3546                 fibdinfo->Reserved2 = cpu_to_le16(0);
3547                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3548                         fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3549                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3550                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3551                 break;
3552         }
3553         case SMB_FIND_FILE_POSIX_INFO:
3554         {
3555                 struct smb2_posix_info *posix_info;
3556                 u64 time;
3557
3558                 posix_info = (struct smb2_posix_info *)kstat;
3559                 posix_info->Ignored = 0;
3560                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3561                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3562                 posix_info->ChangeTime = cpu_to_le64(time);
3563                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3564                 posix_info->LastAccessTime = cpu_to_le64(time);
3565                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3566                 posix_info->LastWriteTime = cpu_to_le64(time);
3567                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3568                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3569                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3570                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3571                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3572                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3573                 posix_info->DosAttributes =
3574                         S_ISDIR(ksmbd_kstat->kstat->mode) ?
3575                                 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3576                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3577                         posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3578                 /*
3579                  * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3580                  * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3581                  *                sub_auth(4 * 1(num_subauth)) + RID(4).
3582                  */
3583                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3584                           SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3585                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3586                           SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3587                 memcpy(posix_info->name, conv_name, conv_len);
3588                 posix_info->name_len = cpu_to_le32(conv_len);
3589                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3590                 break;
3591         }
3592
3593         } /* switch (info_level) */
3594
3595         d_info->last_entry_offset = d_info->data_count;
3596         d_info->data_count += next_entry_offset;
3597         d_info->out_buf_len -= next_entry_offset;
3598         d_info->wptr += next_entry_offset;
3599
3600         ksmbd_debug(SMB,
3601                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3602                     info_level, d_info->out_buf_len,
3603                     next_entry_offset, d_info->data_count);
3604
3605 free_conv_name:
3606         kfree(conv_name);
3607         return rc;
3608 }
3609
3610 struct smb2_query_dir_private {
3611         struct ksmbd_work       *work;
3612         char                    *search_pattern;
3613         struct ksmbd_file       *dir_fp;
3614
3615         struct ksmbd_dir_info   *d_info;
3616         int                     info_level;
3617 };
3618
3619 static void lock_dir(struct ksmbd_file *dir_fp)
3620 {
3621         struct dentry *dir = dir_fp->filp->f_path.dentry;
3622
3623         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3624 }
3625
3626 static void unlock_dir(struct ksmbd_file *dir_fp)
3627 {
3628         struct dentry *dir = dir_fp->filp->f_path.dentry;
3629
3630         inode_unlock(d_inode(dir));
3631 }
3632
3633 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3634 {
3635         struct user_namespace   *user_ns = file_mnt_user_ns(priv->dir_fp->filp);
3636         struct kstat            kstat;
3637         struct ksmbd_kstat      ksmbd_kstat;
3638         int                     rc;
3639         int                     i;
3640
3641         for (i = 0; i < priv->d_info->num_entry; i++) {
3642                 struct dentry *dent;
3643
3644                 if (dentry_name(priv->d_info, priv->info_level))
3645                         return -EINVAL;
3646
3647                 lock_dir(priv->dir_fp);
3648                 dent = lookup_one(user_ns, priv->d_info->name,
3649                                   priv->dir_fp->filp->f_path.dentry,
3650                                   priv->d_info->name_len);
3651                 unlock_dir(priv->dir_fp);
3652
3653                 if (IS_ERR(dent)) {
3654                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3655                                     priv->d_info->name,
3656                                     PTR_ERR(dent));
3657                         continue;
3658                 }
3659                 if (unlikely(d_is_negative(dent))) {
3660                         dput(dent);
3661                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
3662                                     priv->d_info->name);
3663                         continue;
3664                 }
3665
3666                 ksmbd_kstat.kstat = &kstat;
3667                 if (priv->info_level != FILE_NAMES_INFORMATION)
3668                         ksmbd_vfs_fill_dentry_attrs(priv->work,
3669                                                     user_ns,
3670                                                     dent,
3671                                                     &ksmbd_kstat);
3672
3673                 rc = smb2_populate_readdir_entry(priv->work->conn,
3674                                                  priv->info_level,
3675                                                  priv->d_info,
3676                                                  &ksmbd_kstat);
3677                 dput(dent);
3678                 if (rc)
3679                         return rc;
3680         }
3681         return 0;
3682 }
3683
3684 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3685                                    int info_level)
3686 {
3687         int struct_sz;
3688         int conv_len;
3689         int next_entry_offset;
3690
3691         struct_sz = readdir_info_level_struct_sz(info_level);
3692         if (struct_sz == -EOPNOTSUPP)
3693                 return -EOPNOTSUPP;
3694
3695         conv_len = (d_info->name_len + 1) * 2;
3696         next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
3697                                   KSMBD_DIR_INFO_ALIGNMENT);
3698
3699         if (next_entry_offset > d_info->out_buf_len) {
3700                 d_info->out_buf_len = 0;
3701                 return -ENOSPC;
3702         }
3703
3704         switch (info_level) {
3705         case FILE_FULL_DIRECTORY_INFORMATION:
3706         {
3707                 struct file_full_directory_info *ffdinfo;
3708
3709                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3710                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3711                 ffdinfo->FileName[d_info->name_len] = 0x00;
3712                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3713                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3714                 break;
3715         }
3716         case FILE_BOTH_DIRECTORY_INFORMATION:
3717         {
3718                 struct file_both_directory_info *fbdinfo;
3719
3720                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3721                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3722                 fbdinfo->FileName[d_info->name_len] = 0x00;
3723                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3724                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3725                 break;
3726         }
3727         case FILE_DIRECTORY_INFORMATION:
3728         {
3729                 struct file_directory_info *fdinfo;
3730
3731                 fdinfo = (struct file_directory_info *)d_info->wptr;
3732                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3733                 fdinfo->FileName[d_info->name_len] = 0x00;
3734                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3735                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3736                 break;
3737         }
3738         case FILE_NAMES_INFORMATION:
3739         {
3740                 struct file_names_info *fninfo;
3741
3742                 fninfo = (struct file_names_info *)d_info->wptr;
3743                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3744                 fninfo->FileName[d_info->name_len] = 0x00;
3745                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3746                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3747                 break;
3748         }
3749         case FILEID_FULL_DIRECTORY_INFORMATION:
3750         {
3751                 struct file_id_full_dir_info *dinfo;
3752
3753                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3754                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3755                 dinfo->FileName[d_info->name_len] = 0x00;
3756                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3757                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3758                 break;
3759         }
3760         case FILEID_BOTH_DIRECTORY_INFORMATION:
3761         {
3762                 struct file_id_both_directory_info *fibdinfo;
3763
3764                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3765                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3766                 fibdinfo->FileName[d_info->name_len] = 0x00;
3767                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3768                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3769                 break;
3770         }
3771         case SMB_FIND_FILE_POSIX_INFO:
3772         {
3773                 struct smb2_posix_info *posix_info;
3774
3775                 posix_info = (struct smb2_posix_info *)d_info->wptr;
3776                 memcpy(posix_info->name, d_info->name, d_info->name_len);
3777                 posix_info->name[d_info->name_len] = 0x00;
3778                 posix_info->name_len = cpu_to_le32(d_info->name_len);
3779                 posix_info->NextEntryOffset =
3780                         cpu_to_le32(next_entry_offset);
3781                 break;
3782         }
3783         } /* switch (info_level) */
3784
3785         d_info->num_entry++;
3786         d_info->out_buf_len -= next_entry_offset;
3787         d_info->wptr += next_entry_offset;
3788         return 0;
3789 }
3790
3791 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
3792                        loff_t offset, u64 ino, unsigned int d_type)
3793 {
3794         struct ksmbd_readdir_data       *buf;
3795         struct smb2_query_dir_private   *priv;
3796         struct ksmbd_dir_info           *d_info;
3797         int                             rc;
3798
3799         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
3800         priv    = buf->private;
3801         d_info  = priv->d_info;
3802
3803         /* dot and dotdot entries are already reserved */
3804         if (!strcmp(".", name) || !strcmp("..", name))
3805                 return true;
3806         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3807                 return true;
3808         if (!match_pattern(name, namlen, priv->search_pattern))
3809                 return true;
3810
3811         d_info->name            = name;
3812         d_info->name_len        = namlen;
3813         rc = reserve_populate_dentry(d_info, priv->info_level);
3814         if (rc)
3815                 return false;
3816         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
3817                 d_info->out_buf_len = 0;
3818         return true;
3819 }
3820
3821 static int verify_info_level(int info_level)
3822 {
3823         switch (info_level) {
3824         case FILE_FULL_DIRECTORY_INFORMATION:
3825         case FILE_BOTH_DIRECTORY_INFORMATION:
3826         case FILE_DIRECTORY_INFORMATION:
3827         case FILE_NAMES_INFORMATION:
3828         case FILEID_FULL_DIRECTORY_INFORMATION:
3829         case FILEID_BOTH_DIRECTORY_INFORMATION:
3830         case SMB_FIND_FILE_POSIX_INFO:
3831                 break;
3832         default:
3833                 return -EOPNOTSUPP;
3834         }
3835
3836         return 0;
3837 }
3838
3839 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
3840 {
3841         int free_len;
3842
3843         free_len = (int)(work->response_sz -
3844                 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
3845         return free_len;
3846 }
3847
3848 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
3849                                      unsigned short hdr2_len,
3850                                      unsigned int out_buf_len)
3851 {
3852         int free_len;
3853
3854         if (out_buf_len > work->conn->vals->max_trans_size)
3855                 return -EINVAL;
3856
3857         free_len = smb2_resp_buf_len(work, hdr2_len);
3858         if (free_len < 0)
3859                 return -EINVAL;
3860
3861         return min_t(int, out_buf_len, free_len);
3862 }
3863
3864 int smb2_query_dir(struct ksmbd_work *work)
3865 {
3866         struct ksmbd_conn *conn = work->conn;
3867         struct smb2_query_directory_req *req;
3868         struct smb2_query_directory_rsp *rsp;
3869         struct ksmbd_share_config *share = work->tcon->share_conf;
3870         struct ksmbd_file *dir_fp = NULL;
3871         struct ksmbd_dir_info d_info;
3872         int rc = 0;
3873         char *srch_ptr = NULL;
3874         unsigned char srch_flag;
3875         int buffer_sz;
3876         struct smb2_query_dir_private query_dir_private = {NULL, };
3877
3878         WORK_BUFFERS(work, req, rsp);
3879
3880         if (ksmbd_override_fsids(work)) {
3881                 rsp->hdr.Status = STATUS_NO_MEMORY;
3882                 smb2_set_err_rsp(work);
3883                 return -ENOMEM;
3884         }
3885
3886         rc = verify_info_level(req->FileInformationClass);
3887         if (rc) {
3888                 rc = -EFAULT;
3889                 goto err_out2;
3890         }
3891
3892         dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
3893         if (!dir_fp) {
3894                 rc = -EBADF;
3895                 goto err_out2;
3896         }
3897
3898         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
3899             inode_permission(file_mnt_user_ns(dir_fp->filp),
3900                              file_inode(dir_fp->filp),
3901                              MAY_READ | MAY_EXEC)) {
3902                 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
3903                 rc = -EACCES;
3904                 goto err_out2;
3905         }
3906
3907         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
3908                 pr_err("can't do query dir for a file\n");
3909                 rc = -EINVAL;
3910                 goto err_out2;
3911         }
3912
3913         srch_flag = req->Flags;
3914         srch_ptr = smb_strndup_from_utf16(req->Buffer,
3915                                           le16_to_cpu(req->FileNameLength), 1,
3916                                           conn->local_nls);
3917         if (IS_ERR(srch_ptr)) {
3918                 ksmbd_debug(SMB, "Search Pattern not found\n");
3919                 rc = -EINVAL;
3920                 goto err_out2;
3921         } else {
3922                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
3923         }
3924
3925         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
3926                 ksmbd_debug(SMB, "Restart directory scan\n");
3927                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
3928         }
3929
3930         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
3931         d_info.wptr = (char *)rsp->Buffer;
3932         d_info.rptr = (char *)rsp->Buffer;
3933         d_info.out_buf_len =
3934                 smb2_calc_max_out_buf_len(work, 8,
3935                                           le32_to_cpu(req->OutputBufferLength));
3936         if (d_info.out_buf_len < 0) {
3937                 rc = -EINVAL;
3938                 goto err_out;
3939         }
3940         d_info.flags = srch_flag;
3941
3942         /*
3943          * reserve dot and dotdot entries in head of buffer
3944          * in first response
3945          */
3946         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
3947                                                dir_fp, &d_info, srch_ptr,
3948                                                smb2_populate_readdir_entry);
3949         if (rc == -ENOSPC)
3950                 rc = 0;
3951         else if (rc)
3952                 goto err_out;
3953
3954         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
3955                 d_info.hide_dot_file = true;
3956
3957         buffer_sz                               = d_info.out_buf_len;
3958         d_info.rptr                             = d_info.wptr;
3959         query_dir_private.work                  = work;
3960         query_dir_private.search_pattern        = srch_ptr;
3961         query_dir_private.dir_fp                = dir_fp;
3962         query_dir_private.d_info                = &d_info;
3963         query_dir_private.info_level            = req->FileInformationClass;
3964         dir_fp->readdir_data.private            = &query_dir_private;
3965         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
3966
3967         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
3968         /*
3969          * req->OutputBufferLength is too small to contain even one entry.
3970          * In this case, it immediately returns OutputBufferLength 0 to client.
3971          */
3972         if (!d_info.out_buf_len && !d_info.num_entry)
3973                 goto no_buf_len;
3974         if (rc > 0 || rc == -ENOSPC)
3975                 rc = 0;
3976         else if (rc)
3977                 goto err_out;
3978
3979         d_info.wptr = d_info.rptr;
3980         d_info.out_buf_len = buffer_sz;
3981         rc = process_query_dir_entries(&query_dir_private);
3982         if (rc)
3983                 goto err_out;
3984
3985         if (!d_info.data_count && d_info.out_buf_len >= 0) {
3986                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
3987                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
3988                 } else {
3989                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
3990                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
3991                 }
3992                 rsp->StructureSize = cpu_to_le16(9);
3993                 rsp->OutputBufferOffset = cpu_to_le16(0);
3994                 rsp->OutputBufferLength = cpu_to_le32(0);
3995                 rsp->Buffer[0] = 0;
3996                 inc_rfc1001_len(work->response_buf, 9);
3997         } else {
3998 no_buf_len:
3999                 ((struct file_directory_info *)
4000                 ((char *)rsp->Buffer + d_info.last_entry_offset))
4001                 ->NextEntryOffset = 0;
4002                 if (d_info.data_count >= d_info.last_entry_off_align)
4003                         d_info.data_count -= d_info.last_entry_off_align;
4004
4005                 rsp->StructureSize = cpu_to_le16(9);
4006                 rsp->OutputBufferOffset = cpu_to_le16(72);
4007                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4008                 inc_rfc1001_len(work->response_buf, 8 + d_info.data_count);
4009         }
4010
4011         kfree(srch_ptr);
4012         ksmbd_fd_put(work, dir_fp);
4013         ksmbd_revert_fsids(work);
4014         return 0;
4015
4016 err_out:
4017         pr_err("error while processing smb2 query dir rc = %d\n", rc);
4018         kfree(srch_ptr);
4019
4020 err_out2:
4021         if (rc == -EINVAL)
4022                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4023         else if (rc == -EACCES)
4024                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4025         else if (rc == -ENOENT)
4026                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4027         else if (rc == -EBADF)
4028                 rsp->hdr.Status = STATUS_FILE_CLOSED;
4029         else if (rc == -ENOMEM)
4030                 rsp->hdr.Status = STATUS_NO_MEMORY;
4031         else if (rc == -EFAULT)
4032                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4033         else if (rc == -EIO)
4034                 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4035         if (!rsp->hdr.Status)
4036                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4037
4038         smb2_set_err_rsp(work);
4039         ksmbd_fd_put(work, dir_fp);
4040         ksmbd_revert_fsids(work);
4041         return 0;
4042 }
4043
4044 /**
4045  * buffer_check_err() - helper function to check buffer errors
4046  * @reqOutputBufferLength:      max buffer length expected in command response
4047  * @rsp:                query info response buffer contains output buffer length
4048  * @rsp_org:            base response buffer pointer in case of chained response
4049  * @infoclass_size:     query info class response buffer size
4050  *
4051  * Return:      0 on success, otherwise error
4052  */
4053 static int buffer_check_err(int reqOutputBufferLength,
4054                             struct smb2_query_info_rsp *rsp,
4055                             void *rsp_org, int infoclass_size)
4056 {
4057         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4058                 if (reqOutputBufferLength < infoclass_size) {
4059                         pr_err("Invalid Buffer Size Requested\n");
4060                         rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4061                         *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4062                         return -EINVAL;
4063                 }
4064
4065                 ksmbd_debug(SMB, "Buffer Overflow\n");
4066                 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
4067                 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr) +
4068                                 reqOutputBufferLength);
4069                 rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength);
4070         }
4071         return 0;
4072 }
4073
4074 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4075                                    void *rsp_org)
4076 {
4077         struct smb2_file_standard_info *sinfo;
4078
4079         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4080
4081         sinfo->AllocationSize = cpu_to_le64(4096);
4082         sinfo->EndOfFile = cpu_to_le64(0);
4083         sinfo->NumberOfLinks = cpu_to_le32(1);
4084         sinfo->DeletePending = 1;
4085         sinfo->Directory = 0;
4086         rsp->OutputBufferLength =
4087                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4088         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_standard_info));
4089 }
4090
4091 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4092                                    void *rsp_org)
4093 {
4094         struct smb2_file_internal_info *file_info;
4095
4096         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4097
4098         /* any unique number */
4099         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4100         rsp->OutputBufferLength =
4101                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4102         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4103 }
4104
4105 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4106                                    struct smb2_query_info_req *req,
4107                                    struct smb2_query_info_rsp *rsp,
4108                                    void *rsp_org)
4109 {
4110         u64 id;
4111         int rc;
4112
4113         /*
4114          * Windows can sometime send query file info request on
4115          * pipe without opening it, checking error condition here
4116          */
4117         id = req->VolatileFileId;
4118         if (!ksmbd_session_rpc_method(sess, id))
4119                 return -ENOENT;
4120
4121         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4122                     req->FileInfoClass, req->VolatileFileId);
4123
4124         switch (req->FileInfoClass) {
4125         case FILE_STANDARD_INFORMATION:
4126                 get_standard_info_pipe(rsp, rsp_org);
4127                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4128                                       rsp, rsp_org,
4129                                       FILE_STANDARD_INFORMATION_SIZE);
4130                 break;
4131         case FILE_INTERNAL_INFORMATION:
4132                 get_internal_info_pipe(rsp, id, rsp_org);
4133                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4134                                       rsp, rsp_org,
4135                                       FILE_INTERNAL_INFORMATION_SIZE);
4136                 break;
4137         default:
4138                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4139                             req->FileInfoClass);
4140                 rc = -EOPNOTSUPP;
4141         }
4142         return rc;
4143 }
4144
4145 /**
4146  * smb2_get_ea() - handler for smb2 get extended attribute command
4147  * @work:       smb work containing query info command buffer
4148  * @fp:         ksmbd_file pointer
4149  * @req:        get extended attribute request
4150  * @rsp:        response buffer pointer
4151  * @rsp_org:    base response buffer pointer in case of chained response
4152  *
4153  * Return:      0 on success, otherwise error
4154  */
4155 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4156                        struct smb2_query_info_req *req,
4157                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4158 {
4159         struct smb2_ea_info *eainfo, *prev_eainfo;
4160         char *name, *ptr, *xattr_list = NULL, *buf;
4161         int rc, name_len, value_len, xattr_list_len, idx;
4162         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4163         struct smb2_ea_info_req *ea_req = NULL;
4164         const struct path *path;
4165         struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
4166
4167         if (!(fp->daccess & FILE_READ_EA_LE)) {
4168                 pr_err("Not permitted to read ext attr : 0x%x\n",
4169                        fp->daccess);
4170                 return -EACCES;
4171         }
4172
4173         path = &fp->filp->f_path;
4174         /* single EA entry is requested with given user.* name */
4175         if (req->InputBufferLength) {
4176                 if (le32_to_cpu(req->InputBufferLength) <
4177                     sizeof(struct smb2_ea_info_req))
4178                         return -EINVAL;
4179
4180                 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4181         } else {
4182                 /* need to send all EAs, if no specific EA is requested*/
4183                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4184                         ksmbd_debug(SMB,
4185                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4186                                     le32_to_cpu(req->Flags));
4187         }
4188
4189         buf_free_len =
4190                 smb2_calc_max_out_buf_len(work, 8,
4191                                           le32_to_cpu(req->OutputBufferLength));
4192         if (buf_free_len < 0)
4193                 return -EINVAL;
4194
4195         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4196         if (rc < 0) {
4197                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4198                 goto out;
4199         } else if (!rc) { /* there is no EA in the file */
4200                 ksmbd_debug(SMB, "no ea data in the file\n");
4201                 goto done;
4202         }
4203         xattr_list_len = rc;
4204
4205         ptr = (char *)rsp->Buffer;
4206         eainfo = (struct smb2_ea_info *)ptr;
4207         prev_eainfo = eainfo;
4208         idx = 0;
4209
4210         while (idx < xattr_list_len) {
4211                 name = xattr_list + idx;
4212                 name_len = strlen(name);
4213
4214                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4215                 idx += name_len + 1;
4216
4217                 /*
4218                  * CIFS does not support EA other than user.* namespace,
4219                  * still keep the framework generic, to list other attrs
4220                  * in future.
4221                  */
4222                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4223                         continue;
4224
4225                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4226                              STREAM_PREFIX_LEN))
4227                         continue;
4228
4229                 if (req->InputBufferLength &&
4230                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4231                             ea_req->EaNameLength))
4232                         continue;
4233
4234                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4235                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4236                         continue;
4237
4238                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4239                         name_len -= XATTR_USER_PREFIX_LEN;
4240
4241                 ptr = (char *)(&eainfo->name + name_len + 1);
4242                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4243                                 name_len + 1);
4244                 /* bailout if xattr can't fit in buf_free_len */
4245                 value_len = ksmbd_vfs_getxattr(user_ns, path->dentry,
4246                                                name, &buf);
4247                 if (value_len <= 0) {
4248                         rc = -ENOENT;
4249                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4250                         goto out;
4251                 }
4252
4253                 buf_free_len -= value_len;
4254                 if (buf_free_len < 0) {
4255                         kfree(buf);
4256                         break;
4257                 }
4258
4259                 memcpy(ptr, buf, value_len);
4260                 kfree(buf);
4261
4262                 ptr += value_len;
4263                 eainfo->Flags = 0;
4264                 eainfo->EaNameLength = name_len;
4265
4266                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4267                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4268                                name_len);
4269                 else
4270                         memcpy(eainfo->name, name, name_len);
4271
4272                 eainfo->name[name_len] = '\0';
4273                 eainfo->EaValueLength = cpu_to_le16(value_len);
4274                 next_offset = offsetof(struct smb2_ea_info, name) +
4275                         name_len + 1 + value_len;
4276
4277                 /* align next xattr entry at 4 byte bundary */
4278                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4279                 if (alignment_bytes) {
4280                         memset(ptr, '\0', alignment_bytes);
4281                         ptr += alignment_bytes;
4282                         next_offset += alignment_bytes;
4283                         buf_free_len -= alignment_bytes;
4284                 }
4285                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4286                 prev_eainfo = eainfo;
4287                 eainfo = (struct smb2_ea_info *)ptr;
4288                 rsp_data_cnt += next_offset;
4289
4290                 if (req->InputBufferLength) {
4291                         ksmbd_debug(SMB, "single entry requested\n");
4292                         break;
4293                 }
4294         }
4295
4296         /* no more ea entries */
4297         prev_eainfo->NextEntryOffset = 0;
4298 done:
4299         rc = 0;
4300         if (rsp_data_cnt == 0)
4301                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4302         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4303         inc_rfc1001_len(rsp_org, rsp_data_cnt);
4304 out:
4305         kvfree(xattr_list);
4306         return rc;
4307 }
4308
4309 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4310                                  struct ksmbd_file *fp, void *rsp_org)
4311 {
4312         struct smb2_file_access_info *file_info;
4313
4314         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4315         file_info->AccessFlags = fp->daccess;
4316         rsp->OutputBufferLength =
4317                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4318         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info));
4319 }
4320
4321 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4322                                struct ksmbd_file *fp, void *rsp_org)
4323 {
4324         struct smb2_file_basic_info *basic_info;
4325         struct kstat stat;
4326         u64 time;
4327
4328         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4329                 pr_err("no right to read the attributes : 0x%x\n",
4330                        fp->daccess);
4331                 return -EACCES;
4332         }
4333
4334         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4335         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4336                          &stat);
4337         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4338         time = ksmbd_UnixTimeToNT(stat.atime);
4339         basic_info->LastAccessTime = cpu_to_le64(time);
4340         time = ksmbd_UnixTimeToNT(stat.mtime);
4341         basic_info->LastWriteTime = cpu_to_le64(time);
4342         time = ksmbd_UnixTimeToNT(stat.ctime);
4343         basic_info->ChangeTime = cpu_to_le64(time);
4344         basic_info->Attributes = fp->f_ci->m_fattr;
4345         basic_info->Pad1 = 0;
4346         rsp->OutputBufferLength =
4347                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4348         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info));
4349         return 0;
4350 }
4351
4352 static unsigned long long get_allocation_size(struct inode *inode,
4353                                               struct kstat *stat)
4354 {
4355         unsigned long long alloc_size = 0;
4356
4357         if (!S_ISDIR(stat->mode)) {
4358                 if ((inode->i_blocks << 9) <= stat->size)
4359                         alloc_size = stat->size;
4360                 else
4361                         alloc_size = inode->i_blocks << 9;
4362         }
4363
4364         return alloc_size;
4365 }
4366
4367 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4368                                    struct ksmbd_file *fp, void *rsp_org)
4369 {
4370         struct smb2_file_standard_info *sinfo;
4371         unsigned int delete_pending;
4372         struct inode *inode;
4373         struct kstat stat;
4374
4375         inode = file_inode(fp->filp);
4376         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4377
4378         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4379         delete_pending = ksmbd_inode_pending_delete(fp);
4380
4381         sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat));
4382         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4383         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4384         sinfo->DeletePending = delete_pending;
4385         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4386         rsp->OutputBufferLength =
4387                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4388         inc_rfc1001_len(rsp_org,
4389                         sizeof(struct smb2_file_standard_info));
4390 }
4391
4392 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4393                                     void *rsp_org)
4394 {
4395         struct smb2_file_alignment_info *file_info;
4396
4397         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4398         file_info->AlignmentRequirement = 0;
4399         rsp->OutputBufferLength =
4400                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4401         inc_rfc1001_len(rsp_org,
4402                         sizeof(struct smb2_file_alignment_info));
4403 }
4404
4405 static int get_file_all_info(struct ksmbd_work *work,
4406                              struct smb2_query_info_rsp *rsp,
4407                              struct ksmbd_file *fp,
4408                              void *rsp_org)
4409 {
4410         struct ksmbd_conn *conn = work->conn;
4411         struct smb2_file_all_info *file_info;
4412         unsigned int delete_pending;
4413         struct inode *inode;
4414         struct kstat stat;
4415         int conv_len;
4416         char *filename;
4417         u64 time;
4418
4419         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4420                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4421                             fp->daccess);
4422                 return -EACCES;
4423         }
4424
4425         filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4426         if (IS_ERR(filename))
4427                 return PTR_ERR(filename);
4428
4429         inode = file_inode(fp->filp);
4430         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4431
4432         ksmbd_debug(SMB, "filename = %s\n", filename);
4433         delete_pending = ksmbd_inode_pending_delete(fp);
4434         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4435
4436         file_info->CreationTime = cpu_to_le64(fp->create_time);
4437         time = ksmbd_UnixTimeToNT(stat.atime);
4438         file_info->LastAccessTime = cpu_to_le64(time);
4439         time = ksmbd_UnixTimeToNT(stat.mtime);
4440         file_info->LastWriteTime = cpu_to_le64(time);
4441         time = ksmbd_UnixTimeToNT(stat.ctime);
4442         file_info->ChangeTime = cpu_to_le64(time);
4443         file_info->Attributes = fp->f_ci->m_fattr;
4444         file_info->Pad1 = 0;
4445         file_info->AllocationSize =
4446                 cpu_to_le64(get_allocation_size(inode, &stat));
4447         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4448         file_info->NumberOfLinks =
4449                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4450         file_info->DeletePending = delete_pending;
4451         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4452         file_info->Pad2 = 0;
4453         file_info->IndexNumber = cpu_to_le64(stat.ino);
4454         file_info->EASize = 0;
4455         file_info->AccessFlags = fp->daccess;
4456         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4457         file_info->Mode = fp->coption;
4458         file_info->AlignmentRequirement = 0;
4459         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4460                                      PATH_MAX, conn->local_nls, 0);
4461         conv_len *= 2;
4462         file_info->FileNameLength = cpu_to_le32(conv_len);
4463         rsp->OutputBufferLength =
4464                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4465         kfree(filename);
4466         inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4467         return 0;
4468 }
4469
4470 static void get_file_alternate_info(struct ksmbd_work *work,
4471                                     struct smb2_query_info_rsp *rsp,
4472                                     struct ksmbd_file *fp,
4473                                     void *rsp_org)
4474 {
4475         struct ksmbd_conn *conn = work->conn;
4476         struct smb2_file_alt_name_info *file_info;
4477         struct dentry *dentry = fp->filp->f_path.dentry;
4478         int conv_len;
4479
4480         spin_lock(&dentry->d_lock);
4481         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4482         conv_len = ksmbd_extract_shortname(conn,
4483                                            dentry->d_name.name,
4484                                            file_info->FileName);
4485         spin_unlock(&dentry->d_lock);
4486         file_info->FileNameLength = cpu_to_le32(conv_len);
4487         rsp->OutputBufferLength =
4488                 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4489         inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4490 }
4491
4492 static void get_file_stream_info(struct ksmbd_work *work,
4493                                  struct smb2_query_info_rsp *rsp,
4494                                  struct ksmbd_file *fp,
4495                                  void *rsp_org)
4496 {
4497         struct ksmbd_conn *conn = work->conn;
4498         struct smb2_file_stream_info *file_info;
4499         char *stream_name, *xattr_list = NULL, *stream_buf;
4500         struct kstat stat;
4501         const struct path *path = &fp->filp->f_path;
4502         ssize_t xattr_list_len;
4503         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4504         int buf_free_len;
4505         struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4506
4507         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4508                          &stat);
4509         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4510
4511         buf_free_len =
4512                 smb2_calc_max_out_buf_len(work, 8,
4513                                           le32_to_cpu(req->OutputBufferLength));
4514         if (buf_free_len < 0)
4515                 goto out;
4516
4517         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4518         if (xattr_list_len < 0) {
4519                 goto out;
4520         } else if (!xattr_list_len) {
4521                 ksmbd_debug(SMB, "empty xattr in the file\n");
4522                 goto out;
4523         }
4524
4525         while (idx < xattr_list_len) {
4526                 stream_name = xattr_list + idx;
4527                 streamlen = strlen(stream_name);
4528                 idx += streamlen + 1;
4529
4530                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4531
4532                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4533                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4534                         continue;
4535
4536                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4537                                 STREAM_PREFIX_LEN);
4538                 streamlen = stream_name_len;
4539
4540                 /* plus : size */
4541                 streamlen += 1;
4542                 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4543                 if (!stream_buf)
4544                         break;
4545
4546                 streamlen = snprintf(stream_buf, streamlen + 1,
4547                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4548
4549                 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4550                 if (next > buf_free_len) {
4551                         kfree(stream_buf);
4552                         break;
4553                 }
4554
4555                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4556                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4557                                                stream_buf, streamlen,
4558                                                conn->local_nls, 0);
4559                 streamlen *= 2;
4560                 kfree(stream_buf);
4561                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4562                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4563                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4564
4565                 nbytes += next;
4566                 buf_free_len -= next;
4567                 file_info->NextEntryOffset = cpu_to_le32(next);
4568         }
4569
4570 out:
4571         if (!S_ISDIR(stat.mode) &&
4572             buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4573                 file_info = (struct smb2_file_stream_info *)
4574                         &rsp->Buffer[nbytes];
4575                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4576                                               "::$DATA", 7, conn->local_nls, 0);
4577                 streamlen *= 2;
4578                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4579                 file_info->StreamSize = cpu_to_le64(stat.size);
4580                 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4581                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4582         }
4583
4584         /* last entry offset should be 0 */
4585         file_info->NextEntryOffset = 0;
4586         kvfree(xattr_list);
4587
4588         rsp->OutputBufferLength = cpu_to_le32(nbytes);
4589         inc_rfc1001_len(rsp_org, nbytes);
4590 }
4591
4592 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4593                                    struct ksmbd_file *fp, void *rsp_org)
4594 {
4595         struct smb2_file_internal_info *file_info;
4596         struct kstat stat;
4597
4598         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4599                          &stat);
4600         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4601         file_info->IndexNumber = cpu_to_le64(stat.ino);
4602         rsp->OutputBufferLength =
4603                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4604         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4605 }
4606
4607 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4608                                       struct ksmbd_file *fp, void *rsp_org)
4609 {
4610         struct smb2_file_ntwrk_info *file_info;
4611         struct inode *inode;
4612         struct kstat stat;
4613         u64 time;
4614
4615         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4616                 pr_err("no right to read the attributes : 0x%x\n",
4617                        fp->daccess);
4618                 return -EACCES;
4619         }
4620
4621         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4622
4623         inode = file_inode(fp->filp);
4624         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4625
4626         file_info->CreationTime = cpu_to_le64(fp->create_time);
4627         time = ksmbd_UnixTimeToNT(stat.atime);
4628         file_info->LastAccessTime = cpu_to_le64(time);
4629         time = ksmbd_UnixTimeToNT(stat.mtime);
4630         file_info->LastWriteTime = cpu_to_le64(time);
4631         time = ksmbd_UnixTimeToNT(stat.ctime);
4632         file_info->ChangeTime = cpu_to_le64(time);
4633         file_info->Attributes = fp->f_ci->m_fattr;
4634         file_info->AllocationSize =
4635                 cpu_to_le64(get_allocation_size(inode, &stat));
4636         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4637         file_info->Reserved = cpu_to_le32(0);
4638         rsp->OutputBufferLength =
4639                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4640         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info));
4641         return 0;
4642 }
4643
4644 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4645 {
4646         struct smb2_file_ea_info *file_info;
4647
4648         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4649         file_info->EASize = 0;
4650         rsp->OutputBufferLength =
4651                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4652         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info));
4653 }
4654
4655 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4656                                    struct ksmbd_file *fp, void *rsp_org)
4657 {
4658         struct smb2_file_pos_info *file_info;
4659
4660         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4661         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4662         rsp->OutputBufferLength =
4663                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4664         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info));
4665 }
4666
4667 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4668                                struct ksmbd_file *fp, void *rsp_org)
4669 {
4670         struct smb2_file_mode_info *file_info;
4671
4672         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4673         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4674         rsp->OutputBufferLength =
4675                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4676         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info));
4677 }
4678
4679 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4680                                       struct ksmbd_file *fp, void *rsp_org)
4681 {
4682         struct smb2_file_comp_info *file_info;
4683         struct kstat stat;
4684
4685         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4686                          &stat);
4687
4688         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4689         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4690         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4691         file_info->CompressionUnitShift = 0;
4692         file_info->ChunkShift = 0;
4693         file_info->ClusterShift = 0;
4694         memset(&file_info->Reserved[0], 0, 3);
4695
4696         rsp->OutputBufferLength =
4697                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4698         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info));
4699 }
4700
4701 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4702                                        struct ksmbd_file *fp, void *rsp_org)
4703 {
4704         struct smb2_file_attr_tag_info *file_info;
4705
4706         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4707                 pr_err("no right to read the attributes : 0x%x\n",
4708                        fp->daccess);
4709                 return -EACCES;
4710         }
4711
4712         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4713         file_info->FileAttributes = fp->f_ci->m_fattr;
4714         file_info->ReparseTag = 0;
4715         rsp->OutputBufferLength =
4716                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4717         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info));
4718         return 0;
4719 }
4720
4721 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
4722                                 struct ksmbd_file *fp, void *rsp_org)
4723 {
4724         struct smb311_posix_qinfo *file_info;
4725         struct inode *inode = file_inode(fp->filp);
4726         struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
4727         vfsuid_t vfsuid = i_uid_into_vfsuid(user_ns, inode);
4728         vfsgid_t vfsgid = i_gid_into_vfsgid(user_ns, inode);
4729         u64 time;
4730         int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
4731
4732         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4733         file_info->CreationTime = cpu_to_le64(fp->create_time);
4734         time = ksmbd_UnixTimeToNT(inode->i_atime);
4735         file_info->LastAccessTime = cpu_to_le64(time);
4736         time = ksmbd_UnixTimeToNT(inode->i_mtime);
4737         file_info->LastWriteTime = cpu_to_le64(time);
4738         time = ksmbd_UnixTimeToNT(inode->i_ctime);
4739         file_info->ChangeTime = cpu_to_le64(time);
4740         file_info->DosAttributes = fp->f_ci->m_fattr;
4741         file_info->Inode = cpu_to_le64(inode->i_ino);
4742         file_info->EndOfFile = cpu_to_le64(inode->i_size);
4743         file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4744         file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4745         file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
4746         file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4747
4748         /*
4749          * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4750          * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4751          *                sub_auth(4 * 1(num_subauth)) + RID(4).
4752          */
4753         id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
4754                   SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
4755         id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
4756                   SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
4757
4758         rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
4759         inc_rfc1001_len(rsp_org, out_buf_len);
4760         return out_buf_len;
4761 }
4762
4763 static int smb2_get_info_file(struct ksmbd_work *work,
4764                               struct smb2_query_info_req *req,
4765                               struct smb2_query_info_rsp *rsp)
4766 {
4767         struct ksmbd_file *fp;
4768         int fileinfoclass = 0;
4769         int rc = 0;
4770         int file_infoclass_size;
4771         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4772
4773         if (test_share_config_flag(work->tcon->share_conf,
4774                                    KSMBD_SHARE_FLAG_PIPE)) {
4775                 /* smb2 info file called for pipe */
4776                 return smb2_get_info_file_pipe(work->sess, req, rsp,
4777                                                work->response_buf);
4778         }
4779
4780         if (work->next_smb2_rcv_hdr_off) {
4781                 if (!has_file_id(req->VolatileFileId)) {
4782                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4783                                     work->compound_fid);
4784                         id = work->compound_fid;
4785                         pid = work->compound_pfid;
4786                 }
4787         }
4788
4789         if (!has_file_id(id)) {
4790                 id = req->VolatileFileId;
4791                 pid = req->PersistentFileId;
4792         }
4793
4794         fp = ksmbd_lookup_fd_slow(work, id, pid);
4795         if (!fp)
4796                 return -ENOENT;
4797
4798         fileinfoclass = req->FileInfoClass;
4799
4800         switch (fileinfoclass) {
4801         case FILE_ACCESS_INFORMATION:
4802                 get_file_access_info(rsp, fp, work->response_buf);
4803                 file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE;
4804                 break;
4805
4806         case FILE_BASIC_INFORMATION:
4807                 rc = get_file_basic_info(rsp, fp, work->response_buf);
4808                 file_infoclass_size = FILE_BASIC_INFORMATION_SIZE;
4809                 break;
4810
4811         case FILE_STANDARD_INFORMATION:
4812                 get_file_standard_info(rsp, fp, work->response_buf);
4813                 file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE;
4814                 break;
4815
4816         case FILE_ALIGNMENT_INFORMATION:
4817                 get_file_alignment_info(rsp, work->response_buf);
4818                 file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE;
4819                 break;
4820
4821         case FILE_ALL_INFORMATION:
4822                 rc = get_file_all_info(work, rsp, fp, work->response_buf);
4823                 file_infoclass_size = FILE_ALL_INFORMATION_SIZE;
4824                 break;
4825
4826         case FILE_ALTERNATE_NAME_INFORMATION:
4827                 get_file_alternate_info(work, rsp, fp, work->response_buf);
4828                 file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE;
4829                 break;
4830
4831         case FILE_STREAM_INFORMATION:
4832                 get_file_stream_info(work, rsp, fp, work->response_buf);
4833                 file_infoclass_size = FILE_STREAM_INFORMATION_SIZE;
4834                 break;
4835
4836         case FILE_INTERNAL_INFORMATION:
4837                 get_file_internal_info(rsp, fp, work->response_buf);
4838                 file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE;
4839                 break;
4840
4841         case FILE_NETWORK_OPEN_INFORMATION:
4842                 rc = get_file_network_open_info(rsp, fp, work->response_buf);
4843                 file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE;
4844                 break;
4845
4846         case FILE_EA_INFORMATION:
4847                 get_file_ea_info(rsp, work->response_buf);
4848                 file_infoclass_size = FILE_EA_INFORMATION_SIZE;
4849                 break;
4850
4851         case FILE_FULL_EA_INFORMATION:
4852                 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4853                 file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE;
4854                 break;
4855
4856         case FILE_POSITION_INFORMATION:
4857                 get_file_position_info(rsp, fp, work->response_buf);
4858                 file_infoclass_size = FILE_POSITION_INFORMATION_SIZE;
4859                 break;
4860
4861         case FILE_MODE_INFORMATION:
4862                 get_file_mode_info(rsp, fp, work->response_buf);
4863                 file_infoclass_size = FILE_MODE_INFORMATION_SIZE;
4864                 break;
4865
4866         case FILE_COMPRESSION_INFORMATION:
4867                 get_file_compression_info(rsp, fp, work->response_buf);
4868                 file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE;
4869                 break;
4870
4871         case FILE_ATTRIBUTE_TAG_INFORMATION:
4872                 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4873                 file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE;
4874                 break;
4875         case SMB_FIND_FILE_POSIX_INFO:
4876                 if (!work->tcon->posix_extensions) {
4877                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4878                         rc = -EOPNOTSUPP;
4879                 } else {
4880                         file_infoclass_size = find_file_posix_info(rsp, fp,
4881                                         work->response_buf);
4882                 }
4883                 break;
4884         default:
4885                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4886                             fileinfoclass);
4887                 rc = -EOPNOTSUPP;
4888         }
4889         if (!rc)
4890                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4891                                       rsp, work->response_buf,
4892                                       file_infoclass_size);
4893         ksmbd_fd_put(work, fp);
4894         return rc;
4895 }
4896
4897 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4898                                     struct smb2_query_info_req *req,
4899                                     struct smb2_query_info_rsp *rsp)
4900 {
4901         struct ksmbd_session *sess = work->sess;
4902         struct ksmbd_conn *conn = work->conn;
4903         struct ksmbd_share_config *share = work->tcon->share_conf;
4904         int fsinfoclass = 0;
4905         struct kstatfs stfs;
4906         struct path path;
4907         int rc = 0, len;
4908         int fs_infoclass_size = 0;
4909
4910         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
4911         if (rc) {
4912                 pr_err("cannot create vfs path\n");
4913                 return -EIO;
4914         }
4915
4916         rc = vfs_statfs(&path, &stfs);
4917         if (rc) {
4918                 pr_err("cannot do stat of path %s\n", share->path);
4919                 path_put(&path);
4920                 return -EIO;
4921         }
4922
4923         fsinfoclass = req->FileInfoClass;
4924
4925         switch (fsinfoclass) {
4926         case FS_DEVICE_INFORMATION:
4927         {
4928                 struct filesystem_device_info *info;
4929
4930                 info = (struct filesystem_device_info *)rsp->Buffer;
4931
4932                 info->DeviceType = cpu_to_le32(stfs.f_type);
4933                 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
4934                 rsp->OutputBufferLength = cpu_to_le32(8);
4935                 inc_rfc1001_len(work->response_buf, 8);
4936                 fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE;
4937                 break;
4938         }
4939         case FS_ATTRIBUTE_INFORMATION:
4940         {
4941                 struct filesystem_attribute_info *info;
4942                 size_t sz;
4943
4944                 info = (struct filesystem_attribute_info *)rsp->Buffer;
4945                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
4946                                                FILE_PERSISTENT_ACLS |
4947                                                FILE_UNICODE_ON_DISK |
4948                                                FILE_CASE_PRESERVED_NAMES |
4949                                                FILE_CASE_SENSITIVE_SEARCH |
4950                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
4951
4952                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
4953
4954                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
4955                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
4956                                         "NTFS", PATH_MAX, conn->local_nls, 0);
4957                 len = len * 2;
4958                 info->FileSystemNameLen = cpu_to_le32(len);
4959                 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
4960                 rsp->OutputBufferLength = cpu_to_le32(sz);
4961                 inc_rfc1001_len(work->response_buf, sz);
4962                 fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE;
4963                 break;
4964         }
4965         case FS_VOLUME_INFORMATION:
4966         {
4967                 struct filesystem_vol_info *info;
4968                 size_t sz;
4969                 unsigned int serial_crc = 0;
4970
4971                 info = (struct filesystem_vol_info *)(rsp->Buffer);
4972                 info->VolumeCreationTime = 0;
4973                 serial_crc = crc32_le(serial_crc, share->name,
4974                                       strlen(share->name));
4975                 serial_crc = crc32_le(serial_crc, share->path,
4976                                       strlen(share->path));
4977                 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
4978                                       strlen(ksmbd_netbios_name()));
4979                 /* Taking dummy value of serial number*/
4980                 info->SerialNumber = cpu_to_le32(serial_crc);
4981                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
4982                                         share->name, PATH_MAX,
4983                                         conn->local_nls, 0);
4984                 len = len * 2;
4985                 info->VolumeLabelSize = cpu_to_le32(len);
4986                 info->Reserved = 0;
4987                 sz = sizeof(struct filesystem_vol_info) - 2 + len;
4988                 rsp->OutputBufferLength = cpu_to_le32(sz);
4989                 inc_rfc1001_len(work->response_buf, sz);
4990                 fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE;
4991                 break;
4992         }
4993         case FS_SIZE_INFORMATION:
4994         {
4995                 struct filesystem_info *info;
4996
4997                 info = (struct filesystem_info *)(rsp->Buffer);
4998                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4999                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5000                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5001                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5002                 rsp->OutputBufferLength = cpu_to_le32(24);
5003                 inc_rfc1001_len(work->response_buf, 24);
5004                 fs_infoclass_size = FS_SIZE_INFORMATION_SIZE;
5005                 break;
5006         }
5007         case FS_FULL_SIZE_INFORMATION:
5008         {
5009                 struct smb2_fs_full_size_info *info;
5010
5011                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5012                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5013                 info->CallerAvailableAllocationUnits =
5014                                         cpu_to_le64(stfs.f_bavail);
5015                 info->ActualAvailableAllocationUnits =
5016                                         cpu_to_le64(stfs.f_bfree);
5017                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5018                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5019                 rsp->OutputBufferLength = cpu_to_le32(32);
5020                 inc_rfc1001_len(work->response_buf, 32);
5021                 fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE;
5022                 break;
5023         }
5024         case FS_OBJECT_ID_INFORMATION:
5025         {
5026                 struct object_id_info *info;
5027
5028                 info = (struct object_id_info *)(rsp->Buffer);
5029
5030                 if (!user_guest(sess->user))
5031                         memcpy(info->objid, user_passkey(sess->user), 16);
5032                 else
5033                         memset(info->objid, 0, 16);
5034
5035                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5036                 info->extended_info.version = cpu_to_le32(1);
5037                 info->extended_info.release = cpu_to_le32(1);
5038                 info->extended_info.rel_date = 0;
5039                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5040                 rsp->OutputBufferLength = cpu_to_le32(64);
5041                 inc_rfc1001_len(work->response_buf, 64);
5042                 fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE;
5043                 break;
5044         }
5045         case FS_SECTOR_SIZE_INFORMATION:
5046         {
5047                 struct smb3_fs_ss_info *info;
5048                 unsigned int sector_size =
5049                         min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5050
5051                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5052
5053                 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5054                 info->PhysicalBytesPerSectorForAtomicity =
5055                                 cpu_to_le32(sector_size);
5056                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5057                 info->FSEffPhysicalBytesPerSectorForAtomicity =
5058                                 cpu_to_le32(sector_size);
5059                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5060                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5061                 info->ByteOffsetForSectorAlignment = 0;
5062                 info->ByteOffsetForPartitionAlignment = 0;
5063                 rsp->OutputBufferLength = cpu_to_le32(28);
5064                 inc_rfc1001_len(work->response_buf, 28);
5065                 fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE;
5066                 break;
5067         }
5068         case FS_CONTROL_INFORMATION:
5069         {
5070                 /*
5071                  * TODO : The current implementation is based on
5072                  * test result with win7(NTFS) server. It's need to
5073                  * modify this to get valid Quota values
5074                  * from Linux kernel
5075                  */
5076                 struct smb2_fs_control_info *info;
5077
5078                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5079                 info->FreeSpaceStartFiltering = 0;
5080                 info->FreeSpaceThreshold = 0;
5081                 info->FreeSpaceStopFiltering = 0;
5082                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5083                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5084                 info->Padding = 0;
5085                 rsp->OutputBufferLength = cpu_to_le32(48);
5086                 inc_rfc1001_len(work->response_buf, 48);
5087                 fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE;
5088                 break;
5089         }
5090         case FS_POSIX_INFORMATION:
5091         {
5092                 struct filesystem_posix_info *info;
5093
5094                 if (!work->tcon->posix_extensions) {
5095                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5096                         rc = -EOPNOTSUPP;
5097                 } else {
5098                         info = (struct filesystem_posix_info *)(rsp->Buffer);
5099                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5100                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
5101                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5102                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5103                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5104                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5105                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5106                         rsp->OutputBufferLength = cpu_to_le32(56);
5107                         inc_rfc1001_len(work->response_buf, 56);
5108                         fs_infoclass_size = FS_POSIX_INFORMATION_SIZE;
5109                 }
5110                 break;
5111         }
5112         default:
5113                 path_put(&path);
5114                 return -EOPNOTSUPP;
5115         }
5116         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5117                               rsp, work->response_buf,
5118                               fs_infoclass_size);
5119         path_put(&path);
5120         return rc;
5121 }
5122
5123 static int smb2_get_info_sec(struct ksmbd_work *work,
5124                              struct smb2_query_info_req *req,
5125                              struct smb2_query_info_rsp *rsp)
5126 {
5127         struct ksmbd_file *fp;
5128         struct user_namespace *user_ns;
5129         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5130         struct smb_fattr fattr = {{0}};
5131         struct inode *inode;
5132         __u32 secdesclen = 0;
5133         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5134         int addition_info = le32_to_cpu(req->AdditionalInformation);
5135         int rc = 0, ppntsd_size = 0;
5136
5137         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5138                               PROTECTED_DACL_SECINFO |
5139                               UNPROTECTED_DACL_SECINFO)) {
5140                 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5141                        addition_info);
5142
5143                 pntsd->revision = cpu_to_le16(1);
5144                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5145                 pntsd->osidoffset = 0;
5146                 pntsd->gsidoffset = 0;
5147                 pntsd->sacloffset = 0;
5148                 pntsd->dacloffset = 0;
5149
5150                 secdesclen = sizeof(struct smb_ntsd);
5151                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5152                 inc_rfc1001_len(work->response_buf, secdesclen);
5153
5154                 return 0;
5155         }
5156
5157         if (work->next_smb2_rcv_hdr_off) {
5158                 if (!has_file_id(req->VolatileFileId)) {
5159                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5160                                     work->compound_fid);
5161                         id = work->compound_fid;
5162                         pid = work->compound_pfid;
5163                 }
5164         }
5165
5166         if (!has_file_id(id)) {
5167                 id = req->VolatileFileId;
5168                 pid = req->PersistentFileId;
5169         }
5170
5171         fp = ksmbd_lookup_fd_slow(work, id, pid);
5172         if (!fp)
5173                 return -ENOENT;
5174
5175         user_ns = file_mnt_user_ns(fp->filp);
5176         inode = file_inode(fp->filp);
5177         ksmbd_acls_fattr(&fattr, user_ns, inode);
5178
5179         if (test_share_config_flag(work->tcon->share_conf,
5180                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5181                 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, user_ns,
5182                                                      fp->filp->f_path.dentry,
5183                                                      &ppntsd);
5184
5185         /* Check if sd buffer size exceeds response buffer size */
5186         if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5187                 rc = build_sec_desc(user_ns, pntsd, ppntsd, ppntsd_size,
5188                                     addition_info, &secdesclen, &fattr);
5189         posix_acl_release(fattr.cf_acls);
5190         posix_acl_release(fattr.cf_dacls);
5191         kfree(ppntsd);
5192         ksmbd_fd_put(work, fp);
5193         if (rc)
5194                 return rc;
5195
5196         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5197         inc_rfc1001_len(work->response_buf, secdesclen);
5198         return 0;
5199 }
5200
5201 /**
5202  * smb2_query_info() - handler for smb2 query info command
5203  * @work:       smb work containing query info request buffer
5204  *
5205  * Return:      0 on success, otherwise error
5206  */
5207 int smb2_query_info(struct ksmbd_work *work)
5208 {
5209         struct smb2_query_info_req *req;
5210         struct smb2_query_info_rsp *rsp;
5211         int rc = 0;
5212
5213         WORK_BUFFERS(work, req, rsp);
5214
5215         ksmbd_debug(SMB, "GOT query info request\n");
5216
5217         switch (req->InfoType) {
5218         case SMB2_O_INFO_FILE:
5219                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5220                 rc = smb2_get_info_file(work, req, rsp);
5221                 break;
5222         case SMB2_O_INFO_FILESYSTEM:
5223                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5224                 rc = smb2_get_info_filesystem(work, req, rsp);
5225                 break;
5226         case SMB2_O_INFO_SECURITY:
5227                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5228                 rc = smb2_get_info_sec(work, req, rsp);
5229                 break;
5230         default:
5231                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5232                             req->InfoType);
5233                 rc = -EOPNOTSUPP;
5234         }
5235
5236         if (rc < 0) {
5237                 if (rc == -EACCES)
5238                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5239                 else if (rc == -ENOENT)
5240                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5241                 else if (rc == -EIO)
5242                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5243                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5244                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5245                 smb2_set_err_rsp(work);
5246
5247                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5248                             rc);
5249                 return rc;
5250         }
5251         rsp->StructureSize = cpu_to_le16(9);
5252         rsp->OutputBufferOffset = cpu_to_le16(72);
5253         inc_rfc1001_len(work->response_buf, 8);
5254         return 0;
5255 }
5256
5257 /**
5258  * smb2_close_pipe() - handler for closing IPC pipe
5259  * @work:       smb work containing close request buffer
5260  *
5261  * Return:      0
5262  */
5263 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5264 {
5265         u64 id;
5266         struct smb2_close_req *req = smb2_get_msg(work->request_buf);
5267         struct smb2_close_rsp *rsp = smb2_get_msg(work->response_buf);
5268
5269         id = req->VolatileFileId;
5270         ksmbd_session_rpc_close(work->sess, id);
5271
5272         rsp->StructureSize = cpu_to_le16(60);
5273         rsp->Flags = 0;
5274         rsp->Reserved = 0;
5275         rsp->CreationTime = 0;
5276         rsp->LastAccessTime = 0;
5277         rsp->LastWriteTime = 0;
5278         rsp->ChangeTime = 0;
5279         rsp->AllocationSize = 0;
5280         rsp->EndOfFile = 0;
5281         rsp->Attributes = 0;
5282         inc_rfc1001_len(work->response_buf, 60);
5283         return 0;
5284 }
5285
5286 /**
5287  * smb2_close() - handler for smb2 close file command
5288  * @work:       smb work containing close request buffer
5289  *
5290  * Return:      0
5291  */
5292 int smb2_close(struct ksmbd_work *work)
5293 {
5294         u64 volatile_id = KSMBD_NO_FID;
5295         u64 sess_id;
5296         struct smb2_close_req *req;
5297         struct smb2_close_rsp *rsp;
5298         struct ksmbd_conn *conn = work->conn;
5299         struct ksmbd_file *fp;
5300         struct inode *inode;
5301         u64 time;
5302         int err = 0;
5303
5304         WORK_BUFFERS(work, req, rsp);
5305
5306         if (test_share_config_flag(work->tcon->share_conf,
5307                                    KSMBD_SHARE_FLAG_PIPE)) {
5308                 ksmbd_debug(SMB, "IPC pipe close request\n");
5309                 return smb2_close_pipe(work);
5310         }
5311
5312         sess_id = le64_to_cpu(req->hdr.SessionId);
5313         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5314                 sess_id = work->compound_sid;
5315
5316         work->compound_sid = 0;
5317         if (check_session_id(conn, sess_id)) {
5318                 work->compound_sid = sess_id;
5319         } else {
5320                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5321                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5322                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5323                 err = -EBADF;
5324                 goto out;
5325         }
5326
5327         if (work->next_smb2_rcv_hdr_off &&
5328             !has_file_id(req->VolatileFileId)) {
5329                 if (!has_file_id(work->compound_fid)) {
5330                         /* file already closed, return FILE_CLOSED */
5331                         ksmbd_debug(SMB, "file already closed\n");
5332                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5333                         err = -EBADF;
5334                         goto out;
5335                 } else {
5336                         ksmbd_debug(SMB,
5337                                     "Compound request set FID = %llu:%llu\n",
5338                                     work->compound_fid,
5339                                     work->compound_pfid);
5340                         volatile_id = work->compound_fid;
5341
5342                         /* file closed, stored id is not valid anymore */
5343                         work->compound_fid = KSMBD_NO_FID;
5344                         work->compound_pfid = KSMBD_NO_FID;
5345                 }
5346         } else {
5347                 volatile_id = req->VolatileFileId;
5348         }
5349         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5350
5351         rsp->StructureSize = cpu_to_le16(60);
5352         rsp->Reserved = 0;
5353
5354         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5355                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5356                 if (!fp) {
5357                         err = -ENOENT;
5358                         goto out;
5359                 }
5360
5361                 inode = file_inode(fp->filp);
5362                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5363                 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5364                         cpu_to_le64(inode->i_blocks << 9);
5365                 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5366                 rsp->Attributes = fp->f_ci->m_fattr;
5367                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5368                 time = ksmbd_UnixTimeToNT(inode->i_atime);
5369                 rsp->LastAccessTime = cpu_to_le64(time);
5370                 time = ksmbd_UnixTimeToNT(inode->i_mtime);
5371                 rsp->LastWriteTime = cpu_to_le64(time);
5372                 time = ksmbd_UnixTimeToNT(inode->i_ctime);
5373                 rsp->ChangeTime = cpu_to_le64(time);
5374                 ksmbd_fd_put(work, fp);
5375         } else {
5376                 rsp->Flags = 0;
5377                 rsp->AllocationSize = 0;
5378                 rsp->EndOfFile = 0;
5379                 rsp->Attributes = 0;
5380                 rsp->CreationTime = 0;
5381                 rsp->LastAccessTime = 0;
5382                 rsp->LastWriteTime = 0;
5383                 rsp->ChangeTime = 0;
5384         }
5385
5386         err = ksmbd_close_fd(work, volatile_id);
5387 out:
5388         if (err) {
5389                 if (rsp->hdr.Status == 0)
5390                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5391                 smb2_set_err_rsp(work);
5392         } else {
5393                 inc_rfc1001_len(work->response_buf, 60);
5394         }
5395
5396         return 0;
5397 }
5398
5399 /**
5400  * smb2_echo() - handler for smb2 echo(ping) command
5401  * @work:       smb work containing echo request buffer
5402  *
5403  * Return:      0
5404  */
5405 int smb2_echo(struct ksmbd_work *work)
5406 {
5407         struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5408
5409         rsp->StructureSize = cpu_to_le16(4);
5410         rsp->Reserved = 0;
5411         inc_rfc1001_len(work->response_buf, 4);
5412         return 0;
5413 }
5414
5415 static int smb2_rename(struct ksmbd_work *work,
5416                        struct ksmbd_file *fp,
5417                        struct user_namespace *user_ns,
5418                        struct smb2_file_rename_info *file_info,
5419                        struct nls_table *local_nls)
5420 {
5421         struct ksmbd_share_config *share = fp->tcon->share_conf;
5422         char *new_name = NULL, *abs_oldname = NULL, *old_name = NULL;
5423         char *pathname = NULL;
5424         struct path path;
5425         bool file_present = true;
5426         int rc;
5427
5428         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5429         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5430         if (!pathname)
5431                 return -ENOMEM;
5432
5433         abs_oldname = file_path(fp->filp, pathname, PATH_MAX);
5434         if (IS_ERR(abs_oldname)) {
5435                 rc = -EINVAL;
5436                 goto out;
5437         }
5438         old_name = strrchr(abs_oldname, '/');
5439         if (old_name && old_name[1] != '\0') {
5440                 old_name++;
5441         } else {
5442                 ksmbd_debug(SMB, "can't get last component in path %s\n",
5443                             abs_oldname);
5444                 rc = -ENOENT;
5445                 goto out;
5446         }
5447
5448         new_name = smb2_get_name(file_info->FileName,
5449                                  le32_to_cpu(file_info->FileNameLength),
5450                                  local_nls);
5451         if (IS_ERR(new_name)) {
5452                 rc = PTR_ERR(new_name);
5453                 goto out;
5454         }
5455
5456         if (strchr(new_name, ':')) {
5457                 int s_type;
5458                 char *xattr_stream_name, *stream_name = NULL;
5459                 size_t xattr_stream_size;
5460                 int len;
5461
5462                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5463                 if (rc < 0)
5464                         goto out;
5465
5466                 len = strlen(new_name);
5467                 if (len > 0 && new_name[len - 1] != '/') {
5468                         pr_err("not allow base filename in rename\n");
5469                         rc = -ESHARE;
5470                         goto out;
5471                 }
5472
5473                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5474                                                  &xattr_stream_name,
5475                                                  &xattr_stream_size,
5476                                                  s_type);
5477                 if (rc)
5478                         goto out;
5479
5480                 rc = ksmbd_vfs_setxattr(user_ns,
5481                                         fp->filp->f_path.dentry,
5482                                         xattr_stream_name,
5483                                         NULL, 0, 0);
5484                 if (rc < 0) {
5485                         pr_err("failed to store stream name in xattr: %d\n",
5486                                rc);
5487                         rc = -EINVAL;
5488                         goto out;
5489                 }
5490
5491                 goto out;
5492         }
5493
5494         ksmbd_debug(SMB, "new name %s\n", new_name);
5495         rc = ksmbd_vfs_kern_path(work, new_name, LOOKUP_NO_SYMLINKS, &path, 1);
5496         if (rc) {
5497                 if (rc != -ENOENT)
5498                         goto out;
5499                 file_present = false;
5500         } else {
5501                 path_put(&path);
5502         }
5503
5504         if (ksmbd_share_veto_filename(share, new_name)) {
5505                 rc = -ENOENT;
5506                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5507                 goto out;
5508         }
5509
5510         if (file_info->ReplaceIfExists) {
5511                 if (file_present) {
5512                         rc = ksmbd_vfs_remove_file(work, new_name);
5513                         if (rc) {
5514                                 if (rc != -ENOTEMPTY)
5515                                         rc = -EINVAL;
5516                                 ksmbd_debug(SMB, "cannot delete %s, rc %d\n",
5517                                             new_name, rc);
5518                                 goto out;
5519                         }
5520                 }
5521         } else {
5522                 if (file_present &&
5523                     strncmp(old_name, path.dentry->d_name.name, strlen(old_name))) {
5524                         rc = -EEXIST;
5525                         ksmbd_debug(SMB,
5526                                     "cannot rename already existing file\n");
5527                         goto out;
5528                 }
5529         }
5530
5531         rc = ksmbd_vfs_fp_rename(work, fp, new_name);
5532 out:
5533         kfree(pathname);
5534         if (!IS_ERR(new_name))
5535                 kfree(new_name);
5536         return rc;
5537 }
5538
5539 static int smb2_create_link(struct ksmbd_work *work,
5540                             struct ksmbd_share_config *share,
5541                             struct smb2_file_link_info *file_info,
5542                             unsigned int buf_len, struct file *filp,
5543                             struct nls_table *local_nls)
5544 {
5545         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5546         struct path path;
5547         bool file_present = true;
5548         int rc;
5549
5550         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5551                         le32_to_cpu(file_info->FileNameLength))
5552                 return -EINVAL;
5553
5554         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5555         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5556         if (!pathname)
5557                 return -ENOMEM;
5558
5559         link_name = smb2_get_name(file_info->FileName,
5560                                   le32_to_cpu(file_info->FileNameLength),
5561                                   local_nls);
5562         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5563                 rc = -EINVAL;
5564                 goto out;
5565         }
5566
5567         ksmbd_debug(SMB, "link name is %s\n", link_name);
5568         target_name = file_path(filp, pathname, PATH_MAX);
5569         if (IS_ERR(target_name)) {
5570                 rc = -EINVAL;
5571                 goto out;
5572         }
5573
5574         ksmbd_debug(SMB, "target name is %s\n", target_name);
5575         rc = ksmbd_vfs_kern_path(work, link_name, LOOKUP_NO_SYMLINKS, &path, 0);
5576         if (rc) {
5577                 if (rc != -ENOENT)
5578                         goto out;
5579                 file_present = false;
5580         } else {
5581                 path_put(&path);
5582         }
5583
5584         if (file_info->ReplaceIfExists) {
5585                 if (file_present) {
5586                         rc = ksmbd_vfs_remove_file(work, link_name);
5587                         if (rc) {
5588                                 rc = -EINVAL;
5589                                 ksmbd_debug(SMB, "cannot delete %s\n",
5590                                             link_name);
5591                                 goto out;
5592                         }
5593                 }
5594         } else {
5595                 if (file_present) {
5596                         rc = -EEXIST;
5597                         ksmbd_debug(SMB, "link already exists\n");
5598                         goto out;
5599                 }
5600         }
5601
5602         rc = ksmbd_vfs_link(work, target_name, link_name);
5603         if (rc)
5604                 rc = -EINVAL;
5605 out:
5606         if (!IS_ERR(link_name))
5607                 kfree(link_name);
5608         kfree(pathname);
5609         return rc;
5610 }
5611
5612 static int set_file_basic_info(struct ksmbd_file *fp,
5613                                struct smb2_file_basic_info *file_info,
5614                                struct ksmbd_share_config *share)
5615 {
5616         struct iattr attrs;
5617         struct file *filp;
5618         struct inode *inode;
5619         struct user_namespace *user_ns;
5620         int rc = 0;
5621
5622         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5623                 return -EACCES;
5624
5625         attrs.ia_valid = 0;
5626         filp = fp->filp;
5627         inode = file_inode(filp);
5628         user_ns = file_mnt_user_ns(filp);
5629
5630         if (file_info->CreationTime)
5631                 fp->create_time = le64_to_cpu(file_info->CreationTime);
5632
5633         if (file_info->LastAccessTime) {
5634                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5635                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5636         }
5637
5638         attrs.ia_valid |= ATTR_CTIME;
5639         if (file_info->ChangeTime)
5640                 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5641         else
5642                 attrs.ia_ctime = inode->i_ctime;
5643
5644         if (file_info->LastWriteTime) {
5645                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5646                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5647         }
5648
5649         if (file_info->Attributes) {
5650                 if (!S_ISDIR(inode->i_mode) &&
5651                     file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5652                         pr_err("can't change a file to a directory\n");
5653                         return -EINVAL;
5654                 }
5655
5656                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5657                         fp->f_ci->m_fattr = file_info->Attributes |
5658                                 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5659         }
5660
5661         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5662             (file_info->CreationTime || file_info->Attributes)) {
5663                 struct xattr_dos_attrib da = {0};
5664
5665                 da.version = 4;
5666                 da.itime = fp->itime;
5667                 da.create_time = fp->create_time;
5668                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5669                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5670                         XATTR_DOSINFO_ITIME;
5671
5672                 rc = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
5673                                                     filp->f_path.dentry, &da);
5674                 if (rc)
5675                         ksmbd_debug(SMB,
5676                                     "failed to restore file attribute in EA\n");
5677                 rc = 0;
5678         }
5679
5680         if (attrs.ia_valid) {
5681                 struct dentry *dentry = filp->f_path.dentry;
5682                 struct inode *inode = d_inode(dentry);
5683
5684                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5685                         return -EACCES;
5686
5687                 inode_lock(inode);
5688                 inode->i_ctime = attrs.ia_ctime;
5689                 attrs.ia_valid &= ~ATTR_CTIME;
5690                 rc = notify_change(user_ns, dentry, &attrs, NULL);
5691                 inode_unlock(inode);
5692         }
5693         return rc;
5694 }
5695
5696 static int set_file_allocation_info(struct ksmbd_work *work,
5697                                     struct ksmbd_file *fp,
5698                                     struct smb2_file_alloc_info *file_alloc_info)
5699 {
5700         /*
5701          * TODO : It's working fine only when store dos attributes
5702          * is not yes. need to implement a logic which works
5703          * properly with any smb.conf option
5704          */
5705
5706         loff_t alloc_blks;
5707         struct inode *inode;
5708         int rc;
5709
5710         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5711                 return -EACCES;
5712
5713         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5714         inode = file_inode(fp->filp);
5715
5716         if (alloc_blks > inode->i_blocks) {
5717                 smb_break_all_levII_oplock(work, fp, 1);
5718                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5719                                    alloc_blks * 512);
5720                 if (rc && rc != -EOPNOTSUPP) {
5721                         pr_err("vfs_fallocate is failed : %d\n", rc);
5722                         return rc;
5723                 }
5724         } else if (alloc_blks < inode->i_blocks) {
5725                 loff_t size;
5726
5727                 /*
5728                  * Allocation size could be smaller than original one
5729                  * which means allocated blocks in file should be
5730                  * deallocated. use truncate to cut out it, but inode
5731                  * size is also updated with truncate offset.
5732                  * inode size is retained by backup inode size.
5733                  */
5734                 size = i_size_read(inode);
5735                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5736                 if (rc) {
5737                         pr_err("truncate failed!, err %d\n", rc);
5738                         return rc;
5739                 }
5740                 if (size < alloc_blks * 512)
5741                         i_size_write(inode, size);
5742         }
5743         return 0;
5744 }
5745
5746 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5747                                 struct smb2_file_eof_info *file_eof_info)
5748 {
5749         loff_t newsize;
5750         struct inode *inode;
5751         int rc;
5752
5753         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5754                 return -EACCES;
5755
5756         newsize = le64_to_cpu(file_eof_info->EndOfFile);
5757         inode = file_inode(fp->filp);
5758
5759         /*
5760          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5761          * on FAT32 shared device, truncate execution time is too long
5762          * and network error could cause from windows client. because
5763          * truncate of some filesystem like FAT32 fill zero data in
5764          * truncated range.
5765          */
5766         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5767                 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
5768                 rc = ksmbd_vfs_truncate(work, fp, newsize);
5769                 if (rc) {
5770                         ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
5771                         if (rc != -EAGAIN)
5772                                 rc = -EBADF;
5773                         return rc;
5774                 }
5775         }
5776         return 0;
5777 }
5778
5779 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5780                            struct smb2_file_rename_info *rename_info,
5781                            unsigned int buf_len)
5782 {
5783         struct user_namespace *user_ns;
5784         struct ksmbd_file *parent_fp;
5785         struct dentry *parent;
5786         struct dentry *dentry = fp->filp->f_path.dentry;
5787         int ret;
5788
5789         if (!(fp->daccess & FILE_DELETE_LE)) {
5790                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5791                 return -EACCES;
5792         }
5793
5794         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5795                         le32_to_cpu(rename_info->FileNameLength))
5796                 return -EINVAL;
5797
5798         user_ns = file_mnt_user_ns(fp->filp);
5799         if (ksmbd_stream_fd(fp))
5800                 goto next;
5801
5802         parent = dget_parent(dentry);
5803         ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
5804         if (ret) {
5805                 dput(parent);
5806                 return ret;
5807         }
5808
5809         parent_fp = ksmbd_lookup_fd_inode(d_inode(parent));
5810         inode_unlock(d_inode(parent));
5811         dput(parent);
5812
5813         if (parent_fp) {
5814                 if (parent_fp->daccess & FILE_DELETE_LE) {
5815                         pr_err("parent dir is opened with delete access\n");
5816                         ksmbd_fd_put(work, parent_fp);
5817                         return -ESHARE;
5818                 }
5819                 ksmbd_fd_put(work, parent_fp);
5820         }
5821 next:
5822         return smb2_rename(work, fp, user_ns, rename_info,
5823                            work->conn->local_nls);
5824 }
5825
5826 static int set_file_disposition_info(struct ksmbd_file *fp,
5827                                      struct smb2_file_disposition_info *file_info)
5828 {
5829         struct inode *inode;
5830
5831         if (!(fp->daccess & FILE_DELETE_LE)) {
5832                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5833                 return -EACCES;
5834         }
5835
5836         inode = file_inode(fp->filp);
5837         if (file_info->DeletePending) {
5838                 if (S_ISDIR(inode->i_mode) &&
5839                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5840                         return -EBUSY;
5841                 ksmbd_set_inode_pending_delete(fp);
5842         } else {
5843                 ksmbd_clear_inode_pending_delete(fp);
5844         }
5845         return 0;
5846 }
5847
5848 static int set_file_position_info(struct ksmbd_file *fp,
5849                                   struct smb2_file_pos_info *file_info)
5850 {
5851         loff_t current_byte_offset;
5852         unsigned long sector_size;
5853         struct inode *inode;
5854
5855         inode = file_inode(fp->filp);
5856         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5857         sector_size = inode->i_sb->s_blocksize;
5858
5859         if (current_byte_offset < 0 ||
5860             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5861              current_byte_offset & (sector_size - 1))) {
5862                 pr_err("CurrentByteOffset is not valid : %llu\n",
5863                        current_byte_offset);
5864                 return -EINVAL;
5865         }
5866
5867         fp->filp->f_pos = current_byte_offset;
5868         return 0;
5869 }
5870
5871 static int set_file_mode_info(struct ksmbd_file *fp,
5872                               struct smb2_file_mode_info *file_info)
5873 {
5874         __le32 mode;
5875
5876         mode = file_info->Mode;
5877
5878         if ((mode & ~FILE_MODE_INFO_MASK)) {
5879                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5880                 return -EINVAL;
5881         }
5882
5883         /*
5884          * TODO : need to implement consideration for
5885          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5886          */
5887         ksmbd_vfs_set_fadvise(fp->filp, mode);
5888         fp->coption = mode;
5889         return 0;
5890 }
5891
5892 /**
5893  * smb2_set_info_file() - handler for smb2 set info command
5894  * @work:       smb work containing set info command buffer
5895  * @fp:         ksmbd_file pointer
5896  * @req:        request buffer pointer
5897  * @share:      ksmbd_share_config pointer
5898  *
5899  * Return:      0 on success, otherwise error
5900  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5901  */
5902 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5903                               struct smb2_set_info_req *req,
5904                               struct ksmbd_share_config *share)
5905 {
5906         unsigned int buf_len = le32_to_cpu(req->BufferLength);
5907
5908         switch (req->FileInfoClass) {
5909         case FILE_BASIC_INFORMATION:
5910         {
5911                 if (buf_len < sizeof(struct smb2_file_basic_info))
5912                         return -EINVAL;
5913
5914                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5915         }
5916         case FILE_ALLOCATION_INFORMATION:
5917         {
5918                 if (buf_len < sizeof(struct smb2_file_alloc_info))
5919                         return -EINVAL;
5920
5921                 return set_file_allocation_info(work, fp,
5922                                                 (struct smb2_file_alloc_info *)req->Buffer);
5923         }
5924         case FILE_END_OF_FILE_INFORMATION:
5925         {
5926                 if (buf_len < sizeof(struct smb2_file_eof_info))
5927                         return -EINVAL;
5928
5929                 return set_end_of_file_info(work, fp,
5930                                             (struct smb2_file_eof_info *)req->Buffer);
5931         }
5932         case FILE_RENAME_INFORMATION:
5933         {
5934                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5935                         ksmbd_debug(SMB,
5936                                     "User does not have write permission\n");
5937                         return -EACCES;
5938                 }
5939
5940                 if (buf_len < sizeof(struct smb2_file_rename_info))
5941                         return -EINVAL;
5942
5943                 return set_rename_info(work, fp,
5944                                        (struct smb2_file_rename_info *)req->Buffer,
5945                                        buf_len);
5946         }
5947         case FILE_LINK_INFORMATION:
5948         {
5949                 if (buf_len < sizeof(struct smb2_file_link_info))
5950                         return -EINVAL;
5951
5952                 return smb2_create_link(work, work->tcon->share_conf,
5953                                         (struct smb2_file_link_info *)req->Buffer,
5954                                         buf_len, fp->filp,
5955                                         work->conn->local_nls);
5956         }
5957         case FILE_DISPOSITION_INFORMATION:
5958         {
5959                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5960                         ksmbd_debug(SMB,
5961                                     "User does not have write permission\n");
5962                         return -EACCES;
5963                 }
5964
5965                 if (buf_len < sizeof(struct smb2_file_disposition_info))
5966                         return -EINVAL;
5967
5968                 return set_file_disposition_info(fp,
5969                                                  (struct smb2_file_disposition_info *)req->Buffer);
5970         }
5971         case FILE_FULL_EA_INFORMATION:
5972         {
5973                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5974                         pr_err("Not permitted to write ext  attr: 0x%x\n",
5975                                fp->daccess);
5976                         return -EACCES;
5977                 }
5978
5979                 if (buf_len < sizeof(struct smb2_ea_info))
5980                         return -EINVAL;
5981
5982                 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5983                                    buf_len, &fp->filp->f_path);
5984         }
5985         case FILE_POSITION_INFORMATION:
5986         {
5987                 if (buf_len < sizeof(struct smb2_file_pos_info))
5988                         return -EINVAL;
5989
5990                 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
5991         }
5992         case FILE_MODE_INFORMATION:
5993         {
5994                 if (buf_len < sizeof(struct smb2_file_mode_info))
5995                         return -EINVAL;
5996
5997                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
5998         }
5999         }
6000
6001         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6002         return -EOPNOTSUPP;
6003 }
6004
6005 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6006                              char *buffer, int buf_len)
6007 {
6008         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6009
6010         fp->saccess |= FILE_SHARE_DELETE_LE;
6011
6012         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6013                         buf_len, false);
6014 }
6015
6016 /**
6017  * smb2_set_info() - handler for smb2 set info command handler
6018  * @work:       smb work containing set info request buffer
6019  *
6020  * Return:      0 on success, otherwise error
6021  */
6022 int smb2_set_info(struct ksmbd_work *work)
6023 {
6024         struct smb2_set_info_req *req;
6025         struct smb2_set_info_rsp *rsp;
6026         struct ksmbd_file *fp;
6027         int rc = 0;
6028         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6029
6030         ksmbd_debug(SMB, "Received set info request\n");
6031
6032         if (work->next_smb2_rcv_hdr_off) {
6033                 req = ksmbd_req_buf_next(work);
6034                 rsp = ksmbd_resp_buf_next(work);
6035                 if (!has_file_id(req->VolatileFileId)) {
6036                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6037                                     work->compound_fid);
6038                         id = work->compound_fid;
6039                         pid = work->compound_pfid;
6040                 }
6041         } else {
6042                 req = smb2_get_msg(work->request_buf);
6043                 rsp = smb2_get_msg(work->response_buf);
6044         }
6045
6046         if (!has_file_id(id)) {
6047                 id = req->VolatileFileId;
6048                 pid = req->PersistentFileId;
6049         }
6050
6051         fp = ksmbd_lookup_fd_slow(work, id, pid);
6052         if (!fp) {
6053                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6054                 rc = -ENOENT;
6055                 goto err_out;
6056         }
6057
6058         switch (req->InfoType) {
6059         case SMB2_O_INFO_FILE:
6060                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6061                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6062                 break;
6063         case SMB2_O_INFO_SECURITY:
6064                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6065                 if (ksmbd_override_fsids(work)) {
6066                         rc = -ENOMEM;
6067                         goto err_out;
6068                 }
6069                 rc = smb2_set_info_sec(fp,
6070                                        le32_to_cpu(req->AdditionalInformation),
6071                                        req->Buffer,
6072                                        le32_to_cpu(req->BufferLength));
6073                 ksmbd_revert_fsids(work);
6074                 break;
6075         default:
6076                 rc = -EOPNOTSUPP;
6077         }
6078
6079         if (rc < 0)
6080                 goto err_out;
6081
6082         rsp->StructureSize = cpu_to_le16(2);
6083         inc_rfc1001_len(work->response_buf, 2);
6084         ksmbd_fd_put(work, fp);
6085         return 0;
6086
6087 err_out:
6088         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6089                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6090         else if (rc == -EINVAL)
6091                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6092         else if (rc == -ESHARE)
6093                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6094         else if (rc == -ENOENT)
6095                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6096         else if (rc == -EBUSY || rc == -ENOTEMPTY)
6097                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6098         else if (rc == -EAGAIN)
6099                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6100         else if (rc == -EBADF || rc == -ESTALE)
6101                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6102         else if (rc == -EEXIST)
6103                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6104         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6105                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6106         smb2_set_err_rsp(work);
6107         ksmbd_fd_put(work, fp);
6108         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6109         return rc;
6110 }
6111
6112 /**
6113  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6114  * @work:       smb work containing read IPC pipe command buffer
6115  *
6116  * Return:      0 on success, otherwise error
6117  */
6118 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6119 {
6120         int nbytes = 0, err;
6121         u64 id;
6122         struct ksmbd_rpc_command *rpc_resp;
6123         struct smb2_read_req *req = smb2_get_msg(work->request_buf);
6124         struct smb2_read_rsp *rsp = smb2_get_msg(work->response_buf);
6125
6126         id = req->VolatileFileId;
6127
6128         inc_rfc1001_len(work->response_buf, 16);
6129         rpc_resp = ksmbd_rpc_read(work->sess, id);
6130         if (rpc_resp) {
6131                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6132                         err = -EINVAL;
6133                         goto out;
6134                 }
6135
6136                 work->aux_payload_buf =
6137                         kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO);
6138                 if (!work->aux_payload_buf) {
6139                         err = -ENOMEM;
6140                         goto out;
6141                 }
6142
6143                 memcpy(work->aux_payload_buf, rpc_resp->payload,
6144                        rpc_resp->payload_sz);
6145
6146                 nbytes = rpc_resp->payload_sz;
6147                 work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
6148                 work->aux_payload_sz = nbytes;
6149                 kvfree(rpc_resp);
6150         }
6151
6152         rsp->StructureSize = cpu_to_le16(17);
6153         rsp->DataOffset = 80;
6154         rsp->Reserved = 0;
6155         rsp->DataLength = cpu_to_le32(nbytes);
6156         rsp->DataRemaining = 0;
6157         rsp->Flags = 0;
6158         inc_rfc1001_len(work->response_buf, nbytes);
6159         return 0;
6160
6161 out:
6162         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6163         smb2_set_err_rsp(work);
6164         kvfree(rpc_resp);
6165         return err;
6166 }
6167
6168 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6169                                         struct smb2_buffer_desc_v1 *desc,
6170                                         __le32 Channel,
6171                                         __le16 ChannelInfoLength)
6172 {
6173         unsigned int i, ch_count;
6174
6175         if (work->conn->dialect == SMB30_PROT_ID &&
6176             Channel != SMB2_CHANNEL_RDMA_V1)
6177                 return -EINVAL;
6178
6179         ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6180         if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6181                 for (i = 0; i < ch_count; i++) {
6182                         pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6183                                 i,
6184                                 le32_to_cpu(desc[i].token),
6185                                 le32_to_cpu(desc[i].length));
6186                 }
6187         }
6188         if (!ch_count)
6189                 return -EINVAL;
6190
6191         work->need_invalidate_rkey =
6192                 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6193         if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6194                 work->remote_key = le32_to_cpu(desc->token);
6195         return 0;
6196 }
6197
6198 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6199                                       struct smb2_read_req *req, void *data_buf,
6200                                       size_t length)
6201 {
6202         int err;
6203
6204         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6205                                     (struct smb2_buffer_desc_v1 *)
6206                                     ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6207                                     le16_to_cpu(req->ReadChannelInfoLength));
6208         if (err)
6209                 return err;
6210
6211         return length;
6212 }
6213
6214 /**
6215  * smb2_read() - handler for smb2 read from file
6216  * @work:       smb work containing read command buffer
6217  *
6218  * Return:      0 on success, otherwise error
6219  */
6220 int smb2_read(struct ksmbd_work *work)
6221 {
6222         struct ksmbd_conn *conn = work->conn;
6223         struct smb2_read_req *req;
6224         struct smb2_read_rsp *rsp;
6225         struct ksmbd_file *fp = NULL;
6226         loff_t offset;
6227         size_t length, mincount;
6228         ssize_t nbytes = 0, remain_bytes = 0;
6229         int err = 0;
6230         bool is_rdma_channel = false;
6231         unsigned int max_read_size = conn->vals->max_read_size;
6232
6233         WORK_BUFFERS(work, req, rsp);
6234
6235         if (test_share_config_flag(work->tcon->share_conf,
6236                                    KSMBD_SHARE_FLAG_PIPE)) {
6237                 ksmbd_debug(SMB, "IPC pipe read request\n");
6238                 return smb2_read_pipe(work);
6239         }
6240
6241         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6242             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6243                 is_rdma_channel = true;
6244                 max_read_size = get_smbd_max_read_write_size();
6245         }
6246
6247         if (is_rdma_channel == true) {
6248                 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6249
6250                 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6251                         err = -EINVAL;
6252                         goto out;
6253                 }
6254                 err = smb2_set_remote_key_for_rdma(work,
6255                                                    (struct smb2_buffer_desc_v1 *)
6256                                                    ((char *)req + ch_offset),
6257                                                    req->Channel,
6258                                                    req->ReadChannelInfoLength);
6259                 if (err)
6260                         goto out;
6261         }
6262
6263         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6264         if (!fp) {
6265                 err = -ENOENT;
6266                 goto out;
6267         }
6268
6269         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6270                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6271                 err = -EACCES;
6272                 goto out;
6273         }
6274
6275         offset = le64_to_cpu(req->Offset);
6276         length = le32_to_cpu(req->Length);
6277         mincount = le32_to_cpu(req->MinimumCount);
6278
6279         if (length > max_read_size) {
6280                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6281                             max_read_size);
6282                 err = -EINVAL;
6283                 goto out;
6284         }
6285
6286         ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6287                     fp->filp, offset, length);
6288
6289         work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6290         if (!work->aux_payload_buf) {
6291                 err = -ENOMEM;
6292                 goto out;
6293         }
6294
6295         nbytes = ksmbd_vfs_read(work, fp, length, &offset);
6296         if (nbytes < 0) {
6297                 err = nbytes;
6298                 goto out;
6299         }
6300
6301         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6302                 kvfree(work->aux_payload_buf);
6303                 work->aux_payload_buf = NULL;
6304                 rsp->hdr.Status = STATUS_END_OF_FILE;
6305                 smb2_set_err_rsp(work);
6306                 ksmbd_fd_put(work, fp);
6307                 return 0;
6308         }
6309
6310         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6311                     nbytes, offset, mincount);
6312
6313         if (is_rdma_channel == true) {
6314                 /* write data to the client using rdma channel */
6315                 remain_bytes = smb2_read_rdma_channel(work, req,
6316                                                       work->aux_payload_buf,
6317                                                       nbytes);
6318                 kvfree(work->aux_payload_buf);
6319                 work->aux_payload_buf = NULL;
6320
6321                 nbytes = 0;
6322                 if (remain_bytes < 0) {
6323                         err = (int)remain_bytes;
6324                         goto out;
6325                 }
6326         }
6327
6328         rsp->StructureSize = cpu_to_le16(17);
6329         rsp->DataOffset = 80;
6330         rsp->Reserved = 0;
6331         rsp->DataLength = cpu_to_le32(nbytes);
6332         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6333         rsp->Flags = 0;
6334         inc_rfc1001_len(work->response_buf, 16);
6335         work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
6336         work->aux_payload_sz = nbytes;
6337         inc_rfc1001_len(work->response_buf, nbytes);
6338         ksmbd_fd_put(work, fp);
6339         return 0;
6340
6341 out:
6342         if (err) {
6343                 if (err == -EISDIR)
6344                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6345                 else if (err == -EAGAIN)
6346                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6347                 else if (err == -ENOENT)
6348                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6349                 else if (err == -EACCES)
6350                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6351                 else if (err == -ESHARE)
6352                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6353                 else if (err == -EINVAL)
6354                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6355                 else
6356                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6357
6358                 smb2_set_err_rsp(work);
6359         }
6360         ksmbd_fd_put(work, fp);
6361         return err;
6362 }
6363
6364 /**
6365  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6366  * @work:       smb work containing write IPC pipe command buffer
6367  *
6368  * Return:      0 on success, otherwise error
6369  */
6370 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6371 {
6372         struct smb2_write_req *req = smb2_get_msg(work->request_buf);
6373         struct smb2_write_rsp *rsp = smb2_get_msg(work->response_buf);
6374         struct ksmbd_rpc_command *rpc_resp;
6375         u64 id = 0;
6376         int err = 0, ret = 0;
6377         char *data_buf;
6378         size_t length;
6379
6380         length = le32_to_cpu(req->Length);
6381         id = req->VolatileFileId;
6382
6383         if ((u64)le16_to_cpu(req->DataOffset) + length >
6384             get_rfc1002_len(work->request_buf)) {
6385                 pr_err("invalid write data offset %u, smb_len %u\n",
6386                        le16_to_cpu(req->DataOffset),
6387                        get_rfc1002_len(work->request_buf));
6388                 err = -EINVAL;
6389                 goto out;
6390         }
6391
6392         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6393                            le16_to_cpu(req->DataOffset));
6394
6395         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6396         if (rpc_resp) {
6397                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6398                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6399                         kvfree(rpc_resp);
6400                         smb2_set_err_rsp(work);
6401                         return -EOPNOTSUPP;
6402                 }
6403                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6404                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6405                         smb2_set_err_rsp(work);
6406                         kvfree(rpc_resp);
6407                         return ret;
6408                 }
6409                 kvfree(rpc_resp);
6410         }
6411
6412         rsp->StructureSize = cpu_to_le16(17);
6413         rsp->DataOffset = 0;
6414         rsp->Reserved = 0;
6415         rsp->DataLength = cpu_to_le32(length);
6416         rsp->DataRemaining = 0;
6417         rsp->Reserved2 = 0;
6418         inc_rfc1001_len(work->response_buf, 16);
6419         return 0;
6420 out:
6421         if (err) {
6422                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6423                 smb2_set_err_rsp(work);
6424         }
6425
6426         return err;
6427 }
6428
6429 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6430                                        struct smb2_write_req *req,
6431                                        struct ksmbd_file *fp,
6432                                        loff_t offset, size_t length, bool sync)
6433 {
6434         char *data_buf;
6435         int ret;
6436         ssize_t nbytes;
6437
6438         data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6439         if (!data_buf)
6440                 return -ENOMEM;
6441
6442         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6443                                    (struct smb2_buffer_desc_v1 *)
6444                                    ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6445                                    le16_to_cpu(req->WriteChannelInfoLength));
6446         if (ret < 0) {
6447                 kvfree(data_buf);
6448                 return ret;
6449         }
6450
6451         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6452         kvfree(data_buf);
6453         if (ret < 0)
6454                 return ret;
6455
6456         return nbytes;
6457 }
6458
6459 /**
6460  * smb2_write() - handler for smb2 write from file
6461  * @work:       smb work containing write command buffer
6462  *
6463  * Return:      0 on success, otherwise error
6464  */
6465 int smb2_write(struct ksmbd_work *work)
6466 {
6467         struct smb2_write_req *req;
6468         struct smb2_write_rsp *rsp;
6469         struct ksmbd_file *fp = NULL;
6470         loff_t offset;
6471         size_t length;
6472         ssize_t nbytes;
6473         char *data_buf;
6474         bool writethrough = false, is_rdma_channel = false;
6475         int err = 0;
6476         unsigned int max_write_size = work->conn->vals->max_write_size;
6477
6478         WORK_BUFFERS(work, req, rsp);
6479
6480         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6481                 ksmbd_debug(SMB, "IPC pipe write request\n");
6482                 return smb2_write_pipe(work);
6483         }
6484
6485         offset = le64_to_cpu(req->Offset);
6486         length = le32_to_cpu(req->Length);
6487
6488         if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6489             req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6490                 is_rdma_channel = true;
6491                 max_write_size = get_smbd_max_read_write_size();
6492                 length = le32_to_cpu(req->RemainingBytes);
6493         }
6494
6495         if (is_rdma_channel == true) {
6496                 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6497
6498                 if (req->Length != 0 || req->DataOffset != 0 ||
6499                     ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6500                         err = -EINVAL;
6501                         goto out;
6502                 }
6503                 err = smb2_set_remote_key_for_rdma(work,
6504                                                    (struct smb2_buffer_desc_v1 *)
6505                                                    ((char *)req + ch_offset),
6506                                                    req->Channel,
6507                                                    req->WriteChannelInfoLength);
6508                 if (err)
6509                         goto out;
6510         }
6511
6512         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6513                 ksmbd_debug(SMB, "User does not have write permission\n");
6514                 err = -EACCES;
6515                 goto out;
6516         }
6517
6518         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6519         if (!fp) {
6520                 err = -ENOENT;
6521                 goto out;
6522         }
6523
6524         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6525                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6526                 err = -EACCES;
6527                 goto out;
6528         }
6529
6530         if (length > max_write_size) {
6531                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6532                             max_write_size);
6533                 err = -EINVAL;
6534                 goto out;
6535         }
6536
6537         ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6538         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6539                 writethrough = true;
6540
6541         if (is_rdma_channel == false) {
6542                 if (le16_to_cpu(req->DataOffset) <
6543                     offsetof(struct smb2_write_req, Buffer)) {
6544                         err = -EINVAL;
6545                         goto out;
6546                 }
6547
6548                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6549                                     le16_to_cpu(req->DataOffset));
6550
6551                 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6552                             fp->filp, offset, length);
6553                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6554                                       writethrough, &nbytes);
6555                 if (err < 0)
6556                         goto out;
6557         } else {
6558                 /* read data from the client using rdma channel, and
6559                  * write the data.
6560                  */
6561                 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6562                                                  writethrough);
6563                 if (nbytes < 0) {
6564                         err = (int)nbytes;
6565                         goto out;
6566                 }
6567         }
6568
6569         rsp->StructureSize = cpu_to_le16(17);
6570         rsp->DataOffset = 0;
6571         rsp->Reserved = 0;
6572         rsp->DataLength = cpu_to_le32(nbytes);
6573         rsp->DataRemaining = 0;
6574         rsp->Reserved2 = 0;
6575         inc_rfc1001_len(work->response_buf, 16);
6576         ksmbd_fd_put(work, fp);
6577         return 0;
6578
6579 out:
6580         if (err == -EAGAIN)
6581                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6582         else if (err == -ENOSPC || err == -EFBIG)
6583                 rsp->hdr.Status = STATUS_DISK_FULL;
6584         else if (err == -ENOENT)
6585                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6586         else if (err == -EACCES)
6587                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6588         else if (err == -ESHARE)
6589                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6590         else if (err == -EINVAL)
6591                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6592         else
6593                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6594
6595         smb2_set_err_rsp(work);
6596         ksmbd_fd_put(work, fp);
6597         return err;
6598 }
6599
6600 /**
6601  * smb2_flush() - handler for smb2 flush file - fsync
6602  * @work:       smb work containing flush command buffer
6603  *
6604  * Return:      0 on success, otherwise error
6605  */
6606 int smb2_flush(struct ksmbd_work *work)
6607 {
6608         struct smb2_flush_req *req;
6609         struct smb2_flush_rsp *rsp;
6610         int err;
6611
6612         WORK_BUFFERS(work, req, rsp);
6613
6614         ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6615
6616         err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6617         if (err)
6618                 goto out;
6619
6620         rsp->StructureSize = cpu_to_le16(4);
6621         rsp->Reserved = 0;
6622         inc_rfc1001_len(work->response_buf, 4);
6623         return 0;
6624
6625 out:
6626         if (err) {
6627                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6628                 smb2_set_err_rsp(work);
6629         }
6630
6631         return err;
6632 }
6633
6634 /**
6635  * smb2_cancel() - handler for smb2 cancel command
6636  * @work:       smb work containing cancel command buffer
6637  *
6638  * Return:      0 on success, otherwise error
6639  */
6640 int smb2_cancel(struct ksmbd_work *work)
6641 {
6642         struct ksmbd_conn *conn = work->conn;
6643         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6644         struct smb2_hdr *chdr;
6645         struct ksmbd_work *cancel_work = NULL, *iter;
6646         struct list_head *command_list;
6647
6648         ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6649                     hdr->MessageId, hdr->Flags);
6650
6651         if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6652                 command_list = &conn->async_requests;
6653
6654                 spin_lock(&conn->request_lock);
6655                 list_for_each_entry(iter, command_list,
6656                                     async_request_entry) {
6657                         chdr = smb2_get_msg(iter->request_buf);
6658
6659                         if (iter->async_id !=
6660                             le64_to_cpu(hdr->Id.AsyncId))
6661                                 continue;
6662
6663                         ksmbd_debug(SMB,
6664                                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6665                                     le64_to_cpu(hdr->Id.AsyncId),
6666                                     le16_to_cpu(chdr->Command));
6667                         cancel_work = iter;
6668                         break;
6669                 }
6670                 spin_unlock(&conn->request_lock);
6671         } else {
6672                 command_list = &conn->requests;
6673
6674                 spin_lock(&conn->request_lock);
6675                 list_for_each_entry(iter, command_list, request_entry) {
6676                         chdr = smb2_get_msg(iter->request_buf);
6677
6678                         if (chdr->MessageId != hdr->MessageId ||
6679                             iter == work)
6680                                 continue;
6681
6682                         ksmbd_debug(SMB,
6683                                     "smb2 with mid %llu cancelled command = 0x%x\n",
6684                                     le64_to_cpu(hdr->MessageId),
6685                                     le16_to_cpu(chdr->Command));
6686                         cancel_work = iter;
6687                         break;
6688                 }
6689                 spin_unlock(&conn->request_lock);
6690         }
6691
6692         if (cancel_work) {
6693                 cancel_work->state = KSMBD_WORK_CANCELLED;
6694                 if (cancel_work->cancel_fn)
6695                         cancel_work->cancel_fn(cancel_work->cancel_argv);
6696         }
6697
6698         /* For SMB2_CANCEL command itself send no response*/
6699         work->send_no_response = 1;
6700         return 0;
6701 }
6702
6703 struct file_lock *smb_flock_init(struct file *f)
6704 {
6705         struct file_lock *fl;
6706
6707         fl = locks_alloc_lock();
6708         if (!fl)
6709                 goto out;
6710
6711         locks_init_lock(fl);
6712
6713         fl->fl_owner = f;
6714         fl->fl_pid = current->tgid;
6715         fl->fl_file = f;
6716         fl->fl_flags = FL_POSIX;
6717         fl->fl_ops = NULL;
6718         fl->fl_lmops = NULL;
6719
6720 out:
6721         return fl;
6722 }
6723
6724 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6725 {
6726         int cmd = -EINVAL;
6727
6728         /* Checking for wrong flag combination during lock request*/
6729         switch (flags) {
6730         case SMB2_LOCKFLAG_SHARED:
6731                 ksmbd_debug(SMB, "received shared request\n");
6732                 cmd = F_SETLKW;
6733                 flock->fl_type = F_RDLCK;
6734                 flock->fl_flags |= FL_SLEEP;
6735                 break;
6736         case SMB2_LOCKFLAG_EXCLUSIVE:
6737                 ksmbd_debug(SMB, "received exclusive request\n");
6738                 cmd = F_SETLKW;
6739                 flock->fl_type = F_WRLCK;
6740                 flock->fl_flags |= FL_SLEEP;
6741                 break;
6742         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6743                 ksmbd_debug(SMB,
6744                             "received shared & fail immediately request\n");
6745                 cmd = F_SETLK;
6746                 flock->fl_type = F_RDLCK;
6747                 break;
6748         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6749                 ksmbd_debug(SMB,
6750                             "received exclusive & fail immediately request\n");
6751                 cmd = F_SETLK;
6752                 flock->fl_type = F_WRLCK;
6753                 break;
6754         case SMB2_LOCKFLAG_UNLOCK:
6755                 ksmbd_debug(SMB, "received unlock request\n");
6756                 flock->fl_type = F_UNLCK;
6757                 cmd = 0;
6758                 break;
6759         }
6760
6761         return cmd;
6762 }
6763
6764 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6765                                          unsigned int cmd, int flags,
6766                                          struct list_head *lock_list)
6767 {
6768         struct ksmbd_lock *lock;
6769
6770         lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6771         if (!lock)
6772                 return NULL;
6773
6774         lock->cmd = cmd;
6775         lock->fl = flock;
6776         lock->start = flock->fl_start;
6777         lock->end = flock->fl_end;
6778         lock->flags = flags;
6779         if (lock->start == lock->end)
6780                 lock->zero_len = 1;
6781         INIT_LIST_HEAD(&lock->clist);
6782         INIT_LIST_HEAD(&lock->flist);
6783         INIT_LIST_HEAD(&lock->llist);
6784         list_add_tail(&lock->llist, lock_list);
6785
6786         return lock;
6787 }
6788
6789 static void smb2_remove_blocked_lock(void **argv)
6790 {
6791         struct file_lock *flock = (struct file_lock *)argv[0];
6792
6793         ksmbd_vfs_posix_lock_unblock(flock);
6794         wake_up(&flock->fl_wait);
6795 }
6796
6797 static inline bool lock_defer_pending(struct file_lock *fl)
6798 {
6799         /* check pending lock waiters */
6800         return waitqueue_active(&fl->fl_wait);
6801 }
6802
6803 /**
6804  * smb2_lock() - handler for smb2 file lock command
6805  * @work:       smb work containing lock command buffer
6806  *
6807  * Return:      0 on success, otherwise error
6808  */
6809 int smb2_lock(struct ksmbd_work *work)
6810 {
6811         struct smb2_lock_req *req = smb2_get_msg(work->request_buf);
6812         struct smb2_lock_rsp *rsp = smb2_get_msg(work->response_buf);
6813         struct smb2_lock_element *lock_ele;
6814         struct ksmbd_file *fp = NULL;
6815         struct file_lock *flock = NULL;
6816         struct file *filp = NULL;
6817         int lock_count;
6818         int flags = 0;
6819         int cmd = 0;
6820         int err = -EIO, i, rc = 0;
6821         u64 lock_start, lock_length;
6822         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6823         struct ksmbd_conn *conn;
6824         int nolock = 0;
6825         LIST_HEAD(lock_list);
6826         LIST_HEAD(rollback_list);
6827         int prior_lock = 0;
6828
6829         ksmbd_debug(SMB, "Received lock request\n");
6830         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6831         if (!fp) {
6832                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
6833                 err = -ENOENT;
6834                 goto out2;
6835         }
6836
6837         filp = fp->filp;
6838         lock_count = le16_to_cpu(req->LockCount);
6839         lock_ele = req->locks;
6840
6841         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6842         if (!lock_count) {
6843                 err = -EINVAL;
6844                 goto out2;
6845         }
6846
6847         for (i = 0; i < lock_count; i++) {
6848                 flags = le32_to_cpu(lock_ele[i].Flags);
6849
6850                 flock = smb_flock_init(filp);
6851                 if (!flock)
6852                         goto out;
6853
6854                 cmd = smb2_set_flock_flags(flock, flags);
6855
6856                 lock_start = le64_to_cpu(lock_ele[i].Offset);
6857                 lock_length = le64_to_cpu(lock_ele[i].Length);
6858                 if (lock_start > U64_MAX - lock_length) {
6859                         pr_err("Invalid lock range requested\n");
6860                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6861                         goto out;
6862                 }
6863
6864                 if (lock_start > OFFSET_MAX)
6865                         flock->fl_start = OFFSET_MAX;
6866                 else
6867                         flock->fl_start = lock_start;
6868
6869                 lock_length = le64_to_cpu(lock_ele[i].Length);
6870                 if (lock_length > OFFSET_MAX - flock->fl_start)
6871                         lock_length = OFFSET_MAX - flock->fl_start;
6872
6873                 flock->fl_end = flock->fl_start + lock_length;
6874
6875                 if (flock->fl_end < flock->fl_start) {
6876                         ksmbd_debug(SMB,
6877                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
6878                                     flock->fl_end, flock->fl_start);
6879                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6880                         goto out;
6881                 }
6882
6883                 /* Check conflict locks in one request */
6884                 list_for_each_entry(cmp_lock, &lock_list, llist) {
6885                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
6886                             cmp_lock->fl->fl_end >= flock->fl_end) {
6887                                 if (cmp_lock->fl->fl_type != F_UNLCK &&
6888                                     flock->fl_type != F_UNLCK) {
6889                                         pr_err("conflict two locks in one request\n");
6890                                         err = -EINVAL;
6891                                         goto out;
6892                                 }
6893                         }
6894                 }
6895
6896                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6897                 if (!smb_lock) {
6898                         err = -EINVAL;
6899                         goto out;
6900                 }
6901         }
6902
6903         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6904                 if (smb_lock->cmd < 0) {
6905                         err = -EINVAL;
6906                         goto out;
6907                 }
6908
6909                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6910                         err = -EINVAL;
6911                         goto out;
6912                 }
6913
6914                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6915                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6916                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6917                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6918                         err = -EINVAL;
6919                         goto out;
6920                 }
6921
6922                 prior_lock = smb_lock->flags;
6923
6924                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6925                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6926                         goto no_check_cl;
6927
6928                 nolock = 1;
6929                 /* check locks in connection list */
6930                 read_lock(&conn_list_lock);
6931                 list_for_each_entry(conn, &conn_list, conns_list) {
6932                         spin_lock(&conn->llist_lock);
6933                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6934                                 if (file_inode(cmp_lock->fl->fl_file) !=
6935                                     file_inode(smb_lock->fl->fl_file))
6936                                         continue;
6937
6938                                 if (smb_lock->fl->fl_type == F_UNLCK) {
6939                                         if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6940                                             cmp_lock->start == smb_lock->start &&
6941                                             cmp_lock->end == smb_lock->end &&
6942                                             !lock_defer_pending(cmp_lock->fl)) {
6943                                                 nolock = 0;
6944                                                 list_del(&cmp_lock->flist);
6945                                                 list_del(&cmp_lock->clist);
6946                                                 spin_unlock(&conn->llist_lock);
6947                                                 read_unlock(&conn_list_lock);
6948
6949                                                 locks_free_lock(cmp_lock->fl);
6950                                                 kfree(cmp_lock);
6951                                                 goto out_check_cl;
6952                                         }
6953                                         continue;
6954                                 }
6955
6956                                 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
6957                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
6958                                                 continue;
6959                                 } else {
6960                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
6961                                                 continue;
6962                                 }
6963
6964                                 /* check zero byte lock range */
6965                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
6966                                     cmp_lock->start > smb_lock->start &&
6967                                     cmp_lock->start < smb_lock->end) {
6968                                         spin_unlock(&conn->llist_lock);
6969                                         read_unlock(&conn_list_lock);
6970                                         pr_err("previous lock conflict with zero byte lock range\n");
6971                                         goto out;
6972                                 }
6973
6974                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
6975                                     smb_lock->start > cmp_lock->start &&
6976                                     smb_lock->start < cmp_lock->end) {
6977                                         spin_unlock(&conn->llist_lock);
6978                                         read_unlock(&conn_list_lock);
6979                                         pr_err("current lock conflict with zero byte lock range\n");
6980                                         goto out;
6981                                 }
6982
6983                                 if (((cmp_lock->start <= smb_lock->start &&
6984                                       cmp_lock->end > smb_lock->start) ||
6985                                      (cmp_lock->start < smb_lock->end &&
6986                                       cmp_lock->end >= smb_lock->end)) &&
6987                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
6988                                         spin_unlock(&conn->llist_lock);
6989                                         read_unlock(&conn_list_lock);
6990                                         pr_err("Not allow lock operation on exclusive lock range\n");
6991                                         goto out;
6992                                 }
6993                         }
6994                         spin_unlock(&conn->llist_lock);
6995                 }
6996                 read_unlock(&conn_list_lock);
6997 out_check_cl:
6998                 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
6999                         pr_err("Try to unlock nolocked range\n");
7000                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7001                         goto out;
7002                 }
7003
7004 no_check_cl:
7005                 if (smb_lock->zero_len) {
7006                         err = 0;
7007                         goto skip;
7008                 }
7009
7010                 flock = smb_lock->fl;
7011                 list_del(&smb_lock->llist);
7012 retry:
7013                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7014 skip:
7015                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7016                         if (!rc) {
7017                                 ksmbd_debug(SMB, "File unlocked\n");
7018                         } else if (rc == -ENOENT) {
7019                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
7020                                 goto out;
7021                         }
7022                         locks_free_lock(flock);
7023                         kfree(smb_lock);
7024                 } else {
7025                         if (rc == FILE_LOCK_DEFERRED) {
7026                                 void **argv;
7027
7028                                 ksmbd_debug(SMB,
7029                                             "would have to wait for getting lock\n");
7030                                 spin_lock(&work->conn->llist_lock);
7031                                 list_add_tail(&smb_lock->clist,
7032                                               &work->conn->lock_list);
7033                                 spin_unlock(&work->conn->llist_lock);
7034                                 list_add(&smb_lock->llist, &rollback_list);
7035
7036                                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7037                                 if (!argv) {
7038                                         err = -ENOMEM;
7039                                         goto out;
7040                                 }
7041                                 argv[0] = flock;
7042
7043                                 rc = setup_async_work(work,
7044                                                       smb2_remove_blocked_lock,
7045                                                       argv);
7046                                 if (rc) {
7047                                         err = -ENOMEM;
7048                                         goto out;
7049                                 }
7050                                 spin_lock(&fp->f_lock);
7051                                 list_add(&work->fp_entry, &fp->blocked_works);
7052                                 spin_unlock(&fp->f_lock);
7053
7054                                 smb2_send_interim_resp(work, STATUS_PENDING);
7055
7056                                 ksmbd_vfs_posix_lock_wait(flock);
7057
7058                                 if (work->state != KSMBD_WORK_ACTIVE) {
7059                                         list_del(&smb_lock->llist);
7060                                         spin_lock(&work->conn->llist_lock);
7061                                         list_del(&smb_lock->clist);
7062                                         spin_unlock(&work->conn->llist_lock);
7063                                         locks_free_lock(flock);
7064
7065                                         if (work->state == KSMBD_WORK_CANCELLED) {
7066                                                 spin_lock(&fp->f_lock);
7067                                                 list_del(&work->fp_entry);
7068                                                 spin_unlock(&fp->f_lock);
7069                                                 rsp->hdr.Status =
7070                                                         STATUS_CANCELLED;
7071                                                 kfree(smb_lock);
7072                                                 smb2_send_interim_resp(work,
7073                                                                        STATUS_CANCELLED);
7074                                                 work->send_no_response = 1;
7075                                                 goto out;
7076                                         }
7077                                         init_smb2_rsp_hdr(work);
7078                                         smb2_set_err_rsp(work);
7079                                         rsp->hdr.Status =
7080                                                 STATUS_RANGE_NOT_LOCKED;
7081                                         kfree(smb_lock);
7082                                         goto out2;
7083                                 }
7084
7085                                 list_del(&smb_lock->llist);
7086                                 spin_lock(&work->conn->llist_lock);
7087                                 list_del(&smb_lock->clist);
7088                                 spin_unlock(&work->conn->llist_lock);
7089
7090                                 spin_lock(&fp->f_lock);
7091                                 list_del(&work->fp_entry);
7092                                 spin_unlock(&fp->f_lock);
7093                                 goto retry;
7094                         } else if (!rc) {
7095                                 spin_lock(&work->conn->llist_lock);
7096                                 list_add_tail(&smb_lock->clist,
7097                                               &work->conn->lock_list);
7098                                 list_add_tail(&smb_lock->flist,
7099                                               &fp->lock_list);
7100                                 spin_unlock(&work->conn->llist_lock);
7101                                 list_add(&smb_lock->llist, &rollback_list);
7102                                 ksmbd_debug(SMB, "successful in taking lock\n");
7103                         } else {
7104                                 goto out;
7105                         }
7106                 }
7107         }
7108
7109         if (atomic_read(&fp->f_ci->op_count) > 1)
7110                 smb_break_all_oplock(work, fp);
7111
7112         rsp->StructureSize = cpu_to_le16(4);
7113         ksmbd_debug(SMB, "successful in taking lock\n");
7114         rsp->hdr.Status = STATUS_SUCCESS;
7115         rsp->Reserved = 0;
7116         inc_rfc1001_len(work->response_buf, 4);
7117         ksmbd_fd_put(work, fp);
7118         return 0;
7119
7120 out:
7121         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7122                 locks_free_lock(smb_lock->fl);
7123                 list_del(&smb_lock->llist);
7124                 kfree(smb_lock);
7125         }
7126
7127         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7128                 struct file_lock *rlock = NULL;
7129
7130                 rlock = smb_flock_init(filp);
7131                 rlock->fl_type = F_UNLCK;
7132                 rlock->fl_start = smb_lock->start;
7133                 rlock->fl_end = smb_lock->end;
7134
7135                 rc = vfs_lock_file(filp, 0, rlock, NULL);
7136                 if (rc)
7137                         pr_err("rollback unlock fail : %d\n", rc);
7138
7139                 list_del(&smb_lock->llist);
7140                 spin_lock(&work->conn->llist_lock);
7141                 if (!list_empty(&smb_lock->flist))
7142                         list_del(&smb_lock->flist);
7143                 list_del(&smb_lock->clist);
7144                 spin_unlock(&work->conn->llist_lock);
7145
7146                 locks_free_lock(smb_lock->fl);
7147                 locks_free_lock(rlock);
7148                 kfree(smb_lock);
7149         }
7150 out2:
7151         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7152
7153         if (!rsp->hdr.Status) {
7154                 if (err == -EINVAL)
7155                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7156                 else if (err == -ENOMEM)
7157                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7158                 else if (err == -ENOENT)
7159                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7160                 else
7161                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7162         }
7163
7164         smb2_set_err_rsp(work);
7165         ksmbd_fd_put(work, fp);
7166         return err;
7167 }
7168
7169 static int fsctl_copychunk(struct ksmbd_work *work,
7170                            struct copychunk_ioctl_req *ci_req,
7171                            unsigned int cnt_code,
7172                            unsigned int input_count,
7173                            unsigned long long volatile_id,
7174                            unsigned long long persistent_id,
7175                            struct smb2_ioctl_rsp *rsp)
7176 {
7177         struct copychunk_ioctl_rsp *ci_rsp;
7178         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7179         struct srv_copychunk *chunks;
7180         unsigned int i, chunk_count, chunk_count_written = 0;
7181         unsigned int chunk_size_written = 0;
7182         loff_t total_size_written = 0;
7183         int ret = 0;
7184
7185         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7186
7187         rsp->VolatileFileId = volatile_id;
7188         rsp->PersistentFileId = persistent_id;
7189         ci_rsp->ChunksWritten =
7190                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7191         ci_rsp->ChunkBytesWritten =
7192                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7193         ci_rsp->TotalBytesWritten =
7194                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7195
7196         chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7197         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7198         if (chunk_count == 0)
7199                 goto out;
7200         total_size_written = 0;
7201
7202         /* verify the SRV_COPYCHUNK_COPY packet */
7203         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7204             input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7205              chunk_count * sizeof(struct srv_copychunk)) {
7206                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7207                 return -EINVAL;
7208         }
7209
7210         for (i = 0; i < chunk_count; i++) {
7211                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7212                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7213                         break;
7214                 total_size_written += le32_to_cpu(chunks[i].Length);
7215         }
7216
7217         if (i < chunk_count ||
7218             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7219                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7220                 return -EINVAL;
7221         }
7222
7223         src_fp = ksmbd_lookup_foreign_fd(work,
7224                                          le64_to_cpu(ci_req->ResumeKey[0]));
7225         dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7226         ret = -EINVAL;
7227         if (!src_fp ||
7228             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7229                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7230                 goto out;
7231         }
7232
7233         if (!dst_fp) {
7234                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7235                 goto out;
7236         }
7237
7238         /*
7239          * FILE_READ_DATA should only be included in
7240          * the FSCTL_COPYCHUNK case
7241          */
7242         if (cnt_code == FSCTL_COPYCHUNK &&
7243             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7244                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7245                 goto out;
7246         }
7247
7248         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7249                                          chunks, chunk_count,
7250                                          &chunk_count_written,
7251                                          &chunk_size_written,
7252                                          &total_size_written);
7253         if (ret < 0) {
7254                 if (ret == -EACCES)
7255                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7256                 if (ret == -EAGAIN)
7257                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7258                 else if (ret == -EBADF)
7259                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7260                 else if (ret == -EFBIG || ret == -ENOSPC)
7261                         rsp->hdr.Status = STATUS_DISK_FULL;
7262                 else if (ret == -EINVAL)
7263                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7264                 else if (ret == -EISDIR)
7265                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7266                 else if (ret == -E2BIG)
7267                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7268                 else
7269                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7270         }
7271
7272         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7273         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7274         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7275 out:
7276         ksmbd_fd_put(work, src_fp);
7277         ksmbd_fd_put(work, dst_fp);
7278         return ret;
7279 }
7280
7281 static __be32 idev_ipv4_address(struct in_device *idev)
7282 {
7283         __be32 addr = 0;
7284
7285         struct in_ifaddr *ifa;
7286
7287         rcu_read_lock();
7288         in_dev_for_each_ifa_rcu(ifa, idev) {
7289                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7290                         continue;
7291
7292                 addr = ifa->ifa_address;
7293                 break;
7294         }
7295         rcu_read_unlock();
7296         return addr;
7297 }
7298
7299 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7300                                         struct smb2_ioctl_rsp *rsp,
7301                                         unsigned int out_buf_len)
7302 {
7303         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7304         int nbytes = 0;
7305         struct net_device *netdev;
7306         struct sockaddr_storage_rsp *sockaddr_storage;
7307         unsigned int flags;
7308         unsigned long long speed;
7309
7310         rtnl_lock();
7311         for_each_netdev(&init_net, netdev) {
7312                 bool ipv4_set = false;
7313
7314                 if (netdev->type == ARPHRD_LOOPBACK)
7315                         continue;
7316
7317                 flags = dev_get_flags(netdev);
7318                 if (!(flags & IFF_RUNNING))
7319                         continue;
7320 ipv6_retry:
7321                 if (out_buf_len <
7322                     nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7323                         rtnl_unlock();
7324                         return -ENOSPC;
7325                 }
7326
7327                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7328                                 &rsp->Buffer[nbytes];
7329                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7330
7331                 nii_rsp->Capability = 0;
7332                 if (netdev->real_num_tx_queues > 1)
7333                         nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7334                 if (ksmbd_rdma_capable_netdev(netdev))
7335                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7336
7337                 nii_rsp->Next = cpu_to_le32(152);
7338                 nii_rsp->Reserved = 0;
7339
7340                 if (netdev->ethtool_ops->get_link_ksettings) {
7341                         struct ethtool_link_ksettings cmd;
7342
7343                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7344                         speed = cmd.base.speed;
7345                 } else {
7346                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7347                                     "speed is unknown, defaulting to 1Gb/sec");
7348                         speed = SPEED_1000;
7349                 }
7350
7351                 speed *= 1000000;
7352                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7353
7354                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7355                                         nii_rsp->SockAddr_Storage;
7356                 memset(sockaddr_storage, 0, 128);
7357
7358                 if (!ipv4_set) {
7359                         struct in_device *idev;
7360
7361                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7362                         sockaddr_storage->addr4.Port = 0;
7363
7364                         idev = __in_dev_get_rtnl(netdev);
7365                         if (!idev)
7366                                 continue;
7367                         sockaddr_storage->addr4.IPv4address =
7368                                                 idev_ipv4_address(idev);
7369                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7370                         ipv4_set = true;
7371                         goto ipv6_retry;
7372                 } else {
7373                         struct inet6_dev *idev6;
7374                         struct inet6_ifaddr *ifa;
7375                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7376
7377                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7378                         sockaddr_storage->addr6.Port = 0;
7379                         sockaddr_storage->addr6.FlowInfo = 0;
7380
7381                         idev6 = __in6_dev_get(netdev);
7382                         if (!idev6)
7383                                 continue;
7384
7385                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7386                                 if (ifa->flags & (IFA_F_TENTATIVE |
7387                                                         IFA_F_DEPRECATED))
7388                                         continue;
7389                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7390                                 break;
7391                         }
7392                         sockaddr_storage->addr6.ScopeId = 0;
7393                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7394                 }
7395         }
7396         rtnl_unlock();
7397
7398         /* zero if this is last one */
7399         if (nii_rsp)
7400                 nii_rsp->Next = 0;
7401
7402         rsp->PersistentFileId = SMB2_NO_FID;
7403         rsp->VolatileFileId = SMB2_NO_FID;
7404         return nbytes;
7405 }
7406
7407 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7408                                          struct validate_negotiate_info_req *neg_req,
7409                                          struct validate_negotiate_info_rsp *neg_rsp,
7410                                          unsigned int in_buf_len)
7411 {
7412         int ret = 0;
7413         int dialect;
7414
7415         if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7416                         le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7417                 return -EINVAL;
7418
7419         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7420                                              neg_req->DialectCount);
7421         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7422                 ret = -EINVAL;
7423                 goto err_out;
7424         }
7425
7426         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7427                 ret = -EINVAL;
7428                 goto err_out;
7429         }
7430
7431         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7432                 ret = -EINVAL;
7433                 goto err_out;
7434         }
7435
7436         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7437                 ret = -EINVAL;
7438                 goto err_out;
7439         }
7440
7441         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7442         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7443         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7444         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7445 err_out:
7446         return ret;
7447 }
7448
7449 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7450                                         struct file_allocated_range_buffer *qar_req,
7451                                         struct file_allocated_range_buffer *qar_rsp,
7452                                         unsigned int in_count, unsigned int *out_count)
7453 {
7454         struct ksmbd_file *fp;
7455         loff_t start, length;
7456         int ret = 0;
7457
7458         *out_count = 0;
7459         if (in_count == 0)
7460                 return -EINVAL;
7461
7462         fp = ksmbd_lookup_fd_fast(work, id);
7463         if (!fp)
7464                 return -ENOENT;
7465
7466         start = le64_to_cpu(qar_req->file_offset);
7467         length = le64_to_cpu(qar_req->length);
7468
7469         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7470                                    qar_rsp, in_count, out_count);
7471         if (ret && ret != -E2BIG)
7472                 *out_count = 0;
7473
7474         ksmbd_fd_put(work, fp);
7475         return ret;
7476 }
7477
7478 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7479                                  unsigned int out_buf_len,
7480                                  struct smb2_ioctl_req *req,
7481                                  struct smb2_ioctl_rsp *rsp)
7482 {
7483         struct ksmbd_rpc_command *rpc_resp;
7484         char *data_buf = (char *)&req->Buffer[0];
7485         int nbytes = 0;
7486
7487         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7488                                    le32_to_cpu(req->InputCount));
7489         if (rpc_resp) {
7490                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7491                         /*
7492                          * set STATUS_SOME_NOT_MAPPED response
7493                          * for unknown domain sid.
7494                          */
7495                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7496                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7497                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7498                         goto out;
7499                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7500                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7501                         goto out;
7502                 }
7503
7504                 nbytes = rpc_resp->payload_sz;
7505                 if (rpc_resp->payload_sz > out_buf_len) {
7506                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7507                         nbytes = out_buf_len;
7508                 }
7509
7510                 if (!rpc_resp->payload_sz) {
7511                         rsp->hdr.Status =
7512                                 STATUS_UNEXPECTED_IO_ERROR;
7513                         goto out;
7514                 }
7515
7516                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7517         }
7518 out:
7519         kvfree(rpc_resp);
7520         return nbytes;
7521 }
7522
7523 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7524                                    struct file_sparse *sparse)
7525 {
7526         struct ksmbd_file *fp;
7527         struct user_namespace *user_ns;
7528         int ret = 0;
7529         __le32 old_fattr;
7530
7531         fp = ksmbd_lookup_fd_fast(work, id);
7532         if (!fp)
7533                 return -ENOENT;
7534         user_ns = file_mnt_user_ns(fp->filp);
7535
7536         old_fattr = fp->f_ci->m_fattr;
7537         if (sparse->SetSparse)
7538                 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7539         else
7540                 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7541
7542         if (fp->f_ci->m_fattr != old_fattr &&
7543             test_share_config_flag(work->tcon->share_conf,
7544                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7545                 struct xattr_dos_attrib da;
7546
7547                 ret = ksmbd_vfs_get_dos_attrib_xattr(user_ns,
7548                                                      fp->filp->f_path.dentry, &da);
7549                 if (ret <= 0)
7550                         goto out;
7551
7552                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7553                 ret = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
7554                                                      fp->filp->f_path.dentry, &da);
7555                 if (ret)
7556                         fp->f_ci->m_fattr = old_fattr;
7557         }
7558
7559 out:
7560         ksmbd_fd_put(work, fp);
7561         return ret;
7562 }
7563
7564 static int fsctl_request_resume_key(struct ksmbd_work *work,
7565                                     struct smb2_ioctl_req *req,
7566                                     struct resume_key_ioctl_rsp *key_rsp)
7567 {
7568         struct ksmbd_file *fp;
7569
7570         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7571         if (!fp)
7572                 return -ENOENT;
7573
7574         memset(key_rsp, 0, sizeof(*key_rsp));
7575         key_rsp->ResumeKey[0] = req->VolatileFileId;
7576         key_rsp->ResumeKey[1] = req->PersistentFileId;
7577         ksmbd_fd_put(work, fp);
7578
7579         return 0;
7580 }
7581
7582 /**
7583  * smb2_ioctl() - handler for smb2 ioctl command
7584  * @work:       smb work containing ioctl command buffer
7585  *
7586  * Return:      0 on success, otherwise error
7587  */
7588 int smb2_ioctl(struct ksmbd_work *work)
7589 {
7590         struct smb2_ioctl_req *req;
7591         struct smb2_ioctl_rsp *rsp;
7592         unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7593         u64 id = KSMBD_NO_FID;
7594         struct ksmbd_conn *conn = work->conn;
7595         int ret = 0;
7596
7597         if (work->next_smb2_rcv_hdr_off) {
7598                 req = ksmbd_req_buf_next(work);
7599                 rsp = ksmbd_resp_buf_next(work);
7600                 if (!has_file_id(req->VolatileFileId)) {
7601                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7602                                     work->compound_fid);
7603                         id = work->compound_fid;
7604                 }
7605         } else {
7606                 req = smb2_get_msg(work->request_buf);
7607                 rsp = smb2_get_msg(work->response_buf);
7608         }
7609
7610         if (!has_file_id(id))
7611                 id = req->VolatileFileId;
7612
7613         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7614                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7615                 goto out;
7616         }
7617
7618         cnt_code = le32_to_cpu(req->CtlCode);
7619         ret = smb2_calc_max_out_buf_len(work, 48,
7620                                         le32_to_cpu(req->MaxOutputResponse));
7621         if (ret < 0) {
7622                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7623                 goto out;
7624         }
7625         out_buf_len = (unsigned int)ret;
7626         in_buf_len = le32_to_cpu(req->InputCount);
7627
7628         switch (cnt_code) {
7629         case FSCTL_DFS_GET_REFERRALS:
7630         case FSCTL_DFS_GET_REFERRALS_EX:
7631                 /* Not support DFS yet */
7632                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7633                 goto out;
7634         case FSCTL_CREATE_OR_GET_OBJECT_ID:
7635         {
7636                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7637
7638                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7639                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7640                         &rsp->Buffer[0];
7641
7642                 /*
7643                  * TODO: This is dummy implementation to pass smbtorture
7644                  * Need to check correct response later
7645                  */
7646                 memset(obj_buf->ObjectId, 0x0, 16);
7647                 memset(obj_buf->BirthVolumeId, 0x0, 16);
7648                 memset(obj_buf->BirthObjectId, 0x0, 16);
7649                 memset(obj_buf->DomainId, 0x0, 16);
7650
7651                 break;
7652         }
7653         case FSCTL_PIPE_TRANSCEIVE:
7654                 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7655                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7656                 break;
7657         case FSCTL_VALIDATE_NEGOTIATE_INFO:
7658                 if (conn->dialect < SMB30_PROT_ID) {
7659                         ret = -EOPNOTSUPP;
7660                         goto out;
7661                 }
7662
7663                 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
7664                                           Dialects)) {
7665                         ret = -EINVAL;
7666                         goto out;
7667                 }
7668
7669                 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
7670                         ret = -EINVAL;
7671                         goto out;
7672                 }
7673
7674                 ret = fsctl_validate_negotiate_info(conn,
7675                         (struct validate_negotiate_info_req *)&req->Buffer[0],
7676                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7677                         in_buf_len);
7678                 if (ret < 0)
7679                         goto out;
7680
7681                 nbytes = sizeof(struct validate_negotiate_info_rsp);
7682                 rsp->PersistentFileId = SMB2_NO_FID;
7683                 rsp->VolatileFileId = SMB2_NO_FID;
7684                 break;
7685         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7686                 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7687                 if (ret < 0)
7688                         goto out;
7689                 nbytes = ret;
7690                 break;
7691         case FSCTL_REQUEST_RESUME_KEY:
7692                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7693                         ret = -EINVAL;
7694                         goto out;
7695                 }
7696
7697                 ret = fsctl_request_resume_key(work, req,
7698                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7699                 if (ret < 0)
7700                         goto out;
7701                 rsp->PersistentFileId = req->PersistentFileId;
7702                 rsp->VolatileFileId = req->VolatileFileId;
7703                 nbytes = sizeof(struct resume_key_ioctl_rsp);
7704                 break;
7705         case FSCTL_COPYCHUNK:
7706         case FSCTL_COPYCHUNK_WRITE:
7707                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7708                         ksmbd_debug(SMB,
7709                                     "User does not have write permission\n");
7710                         ret = -EACCES;
7711                         goto out;
7712                 }
7713
7714                 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7715                         ret = -EINVAL;
7716                         goto out;
7717                 }
7718
7719                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7720                         ret = -EINVAL;
7721                         goto out;
7722                 }
7723
7724                 nbytes = sizeof(struct copychunk_ioctl_rsp);
7725                 rsp->VolatileFileId = req->VolatileFileId;
7726                 rsp->PersistentFileId = req->PersistentFileId;
7727                 fsctl_copychunk(work,
7728                                 (struct copychunk_ioctl_req *)&req->Buffer[0],
7729                                 le32_to_cpu(req->CtlCode),
7730                                 le32_to_cpu(req->InputCount),
7731                                 req->VolatileFileId,
7732                                 req->PersistentFileId,
7733                                 rsp);
7734                 break;
7735         case FSCTL_SET_SPARSE:
7736                 if (in_buf_len < sizeof(struct file_sparse)) {
7737                         ret = -EINVAL;
7738                         goto out;
7739                 }
7740
7741                 ret = fsctl_set_sparse(work, id,
7742                                        (struct file_sparse *)&req->Buffer[0]);
7743                 if (ret < 0)
7744                         goto out;
7745                 break;
7746         case FSCTL_SET_ZERO_DATA:
7747         {
7748                 struct file_zero_data_information *zero_data;
7749                 struct ksmbd_file *fp;
7750                 loff_t off, len, bfz;
7751
7752                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7753                         ksmbd_debug(SMB,
7754                                     "User does not have write permission\n");
7755                         ret = -EACCES;
7756                         goto out;
7757                 }
7758
7759                 if (in_buf_len < sizeof(struct file_zero_data_information)) {
7760                         ret = -EINVAL;
7761                         goto out;
7762                 }
7763
7764                 zero_data =
7765                         (struct file_zero_data_information *)&req->Buffer[0];
7766
7767                 off = le64_to_cpu(zero_data->FileOffset);
7768                 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
7769                 if (off > bfz) {
7770                         ret = -EINVAL;
7771                         goto out;
7772                 }
7773
7774                 len = bfz - off;
7775                 if (len) {
7776                         fp = ksmbd_lookup_fd_fast(work, id);
7777                         if (!fp) {
7778                                 ret = -ENOENT;
7779                                 goto out;
7780                         }
7781
7782                         ret = ksmbd_vfs_zero_data(work, fp, off, len);
7783                         ksmbd_fd_put(work, fp);
7784                         if (ret < 0)
7785                                 goto out;
7786                 }
7787                 break;
7788         }
7789         case FSCTL_QUERY_ALLOCATED_RANGES:
7790                 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7791                         ret = -EINVAL;
7792                         goto out;
7793                 }
7794
7795                 ret = fsctl_query_allocated_ranges(work, id,
7796                         (struct file_allocated_range_buffer *)&req->Buffer[0],
7797                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7798                         out_buf_len /
7799                         sizeof(struct file_allocated_range_buffer), &nbytes);
7800                 if (ret == -E2BIG) {
7801                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7802                 } else if (ret < 0) {
7803                         nbytes = 0;
7804                         goto out;
7805                 }
7806
7807                 nbytes *= sizeof(struct file_allocated_range_buffer);
7808                 break;
7809         case FSCTL_GET_REPARSE_POINT:
7810         {
7811                 struct reparse_data_buffer *reparse_ptr;
7812                 struct ksmbd_file *fp;
7813
7814                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7815                 fp = ksmbd_lookup_fd_fast(work, id);
7816                 if (!fp) {
7817                         pr_err("not found fp!!\n");
7818                         ret = -ENOENT;
7819                         goto out;
7820                 }
7821
7822                 reparse_ptr->ReparseTag =
7823                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7824                 reparse_ptr->ReparseDataLength = 0;
7825                 ksmbd_fd_put(work, fp);
7826                 nbytes = sizeof(struct reparse_data_buffer);
7827                 break;
7828         }
7829         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7830         {
7831                 struct ksmbd_file *fp_in, *fp_out = NULL;
7832                 struct duplicate_extents_to_file *dup_ext;
7833                 loff_t src_off, dst_off, length, cloned;
7834
7835                 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7836                         ret = -EINVAL;
7837                         goto out;
7838                 }
7839
7840                 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7841
7842                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7843                                              dup_ext->PersistentFileHandle);
7844                 if (!fp_in) {
7845                         pr_err("not found file handle in duplicate extent to file\n");
7846                         ret = -ENOENT;
7847                         goto out;
7848                 }
7849
7850                 fp_out = ksmbd_lookup_fd_fast(work, id);
7851                 if (!fp_out) {
7852                         pr_err("not found fp\n");
7853                         ret = -ENOENT;
7854                         goto dup_ext_out;
7855                 }
7856
7857                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7858                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7859                 length = le64_to_cpu(dup_ext->ByteCount);
7860                 /*
7861                  * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
7862                  * should fall back to vfs_copy_file_range().  This could be
7863                  * beneficial when re-exporting nfs/smb mount, but note that
7864                  * this can result in partial copy that returns an error status.
7865                  * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
7866                  * fall back to vfs_copy_file_range(), should be avoided when
7867                  * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
7868                  */
7869                 cloned = vfs_clone_file_range(fp_in->filp, src_off,
7870                                               fp_out->filp, dst_off, length, 0);
7871                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7872                         ret = -EOPNOTSUPP;
7873                         goto dup_ext_out;
7874                 } else if (cloned != length) {
7875                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
7876                                                      fp_out->filp, dst_off,
7877                                                      length, 0);
7878                         if (cloned != length) {
7879                                 if (cloned < 0)
7880                                         ret = cloned;
7881                                 else
7882                                         ret = -EINVAL;
7883                         }
7884                 }
7885
7886 dup_ext_out:
7887                 ksmbd_fd_put(work, fp_in);
7888                 ksmbd_fd_put(work, fp_out);
7889                 if (ret < 0)
7890                         goto out;
7891                 break;
7892         }
7893         default:
7894                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7895                             cnt_code);
7896                 ret = -EOPNOTSUPP;
7897                 goto out;
7898         }
7899
7900         rsp->CtlCode = cpu_to_le32(cnt_code);
7901         rsp->InputCount = cpu_to_le32(0);
7902         rsp->InputOffset = cpu_to_le32(112);
7903         rsp->OutputOffset = cpu_to_le32(112);
7904         rsp->OutputCount = cpu_to_le32(nbytes);
7905         rsp->StructureSize = cpu_to_le16(49);
7906         rsp->Reserved = cpu_to_le16(0);
7907         rsp->Flags = cpu_to_le32(0);
7908         rsp->Reserved2 = cpu_to_le32(0);
7909         inc_rfc1001_len(work->response_buf, 48 + nbytes);
7910
7911         return 0;
7912
7913 out:
7914         if (ret == -EACCES)
7915                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7916         else if (ret == -ENOENT)
7917                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7918         else if (ret == -EOPNOTSUPP)
7919                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7920         else if (ret == -ENOSPC)
7921                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7922         else if (ret < 0 || rsp->hdr.Status == 0)
7923                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7924         smb2_set_err_rsp(work);
7925         return 0;
7926 }
7927
7928 /**
7929  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7930  * @work:       smb work containing oplock break command buffer
7931  *
7932  * Return:      0
7933  */
7934 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7935 {
7936         struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
7937         struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
7938         struct ksmbd_file *fp;
7939         struct oplock_info *opinfo = NULL;
7940         __le32 err = 0;
7941         int ret = 0;
7942         u64 volatile_id, persistent_id;
7943         char req_oplevel = 0, rsp_oplevel = 0;
7944         unsigned int oplock_change_type;
7945
7946         volatile_id = req->VolatileFid;
7947         persistent_id = req->PersistentFid;
7948         req_oplevel = req->OplockLevel;
7949         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7950                     volatile_id, persistent_id, req_oplevel);
7951
7952         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7953         if (!fp) {
7954                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7955                 smb2_set_err_rsp(work);
7956                 return;
7957         }
7958
7959         opinfo = opinfo_get(fp);
7960         if (!opinfo) {
7961                 pr_err("unexpected null oplock_info\n");
7962                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7963                 smb2_set_err_rsp(work);
7964                 ksmbd_fd_put(work, fp);
7965                 return;
7966         }
7967
7968         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
7969                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7970                 goto err_out;
7971         }
7972
7973         if (opinfo->op_state == OPLOCK_STATE_NONE) {
7974                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
7975                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7976                 goto err_out;
7977         }
7978
7979         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7980              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7981             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
7982              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
7983                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7984                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
7985         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7986                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
7987                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7988                 oplock_change_type = OPLOCK_READ_TO_NONE;
7989         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
7990                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7991                 err = STATUS_INVALID_DEVICE_STATE;
7992                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7993                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7994                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
7995                         oplock_change_type = OPLOCK_WRITE_TO_READ;
7996                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7997                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7998                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7999                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
8000                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8001                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8002                         oplock_change_type = OPLOCK_READ_TO_NONE;
8003                 } else {
8004                         oplock_change_type = 0;
8005                 }
8006         } else {
8007                 oplock_change_type = 0;
8008         }
8009
8010         switch (oplock_change_type) {
8011         case OPLOCK_WRITE_TO_READ:
8012                 ret = opinfo_write_to_read(opinfo);
8013                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8014                 break;
8015         case OPLOCK_WRITE_TO_NONE:
8016                 ret = opinfo_write_to_none(opinfo);
8017                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8018                 break;
8019         case OPLOCK_READ_TO_NONE:
8020                 ret = opinfo_read_to_none(opinfo);
8021                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8022                 break;
8023         default:
8024                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8025                        opinfo->level, rsp_oplevel);
8026         }
8027
8028         if (ret < 0) {
8029                 rsp->hdr.Status = err;
8030                 goto err_out;
8031         }
8032
8033         opinfo_put(opinfo);
8034         ksmbd_fd_put(work, fp);
8035         opinfo->op_state = OPLOCK_STATE_NONE;
8036         wake_up_interruptible_all(&opinfo->oplock_q);
8037
8038         rsp->StructureSize = cpu_to_le16(24);
8039         rsp->OplockLevel = rsp_oplevel;
8040         rsp->Reserved = 0;
8041         rsp->Reserved2 = 0;
8042         rsp->VolatileFid = volatile_id;
8043         rsp->PersistentFid = persistent_id;
8044         inc_rfc1001_len(work->response_buf, 24);
8045         return;
8046
8047 err_out:
8048         opinfo->op_state = OPLOCK_STATE_NONE;
8049         wake_up_interruptible_all(&opinfo->oplock_q);
8050
8051         opinfo_put(opinfo);
8052         ksmbd_fd_put(work, fp);
8053         smb2_set_err_rsp(work);
8054 }
8055
8056 static int check_lease_state(struct lease *lease, __le32 req_state)
8057 {
8058         if ((lease->new_state ==
8059              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8060             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8061                 lease->new_state = req_state;
8062                 return 0;
8063         }
8064
8065         if (lease->new_state == req_state)
8066                 return 0;
8067
8068         return 1;
8069 }
8070
8071 /**
8072  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8073  * @work:       smb work containing lease break command buffer
8074  *
8075  * Return:      0
8076  */
8077 static void smb21_lease_break_ack(struct ksmbd_work *work)
8078 {
8079         struct ksmbd_conn *conn = work->conn;
8080         struct smb2_lease_ack *req = smb2_get_msg(work->request_buf);
8081         struct smb2_lease_ack *rsp = smb2_get_msg(work->response_buf);
8082         struct oplock_info *opinfo;
8083         __le32 err = 0;
8084         int ret = 0;
8085         unsigned int lease_change_type;
8086         __le32 lease_state;
8087         struct lease *lease;
8088
8089         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8090                     le32_to_cpu(req->LeaseState));
8091         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8092         if (!opinfo) {
8093                 ksmbd_debug(OPLOCK, "file not opened\n");
8094                 smb2_set_err_rsp(work);
8095                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8096                 return;
8097         }
8098         lease = opinfo->o_lease;
8099
8100         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8101                 pr_err("unexpected lease break state 0x%x\n",
8102                        opinfo->op_state);
8103                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8104                 goto err_out;
8105         }
8106
8107         if (check_lease_state(lease, req->LeaseState)) {
8108                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8109                 ksmbd_debug(OPLOCK,
8110                             "req lease state: 0x%x, expected state: 0x%x\n",
8111                             req->LeaseState, lease->new_state);
8112                 goto err_out;
8113         }
8114
8115         if (!atomic_read(&opinfo->breaking_cnt)) {
8116                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8117                 goto err_out;
8118         }
8119
8120         /* check for bad lease state */
8121         if (req->LeaseState &
8122             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8123                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8124                 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8125                         lease_change_type = OPLOCK_WRITE_TO_NONE;
8126                 else
8127                         lease_change_type = OPLOCK_READ_TO_NONE;
8128                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8129                             le32_to_cpu(lease->state),
8130                             le32_to_cpu(req->LeaseState));
8131         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8132                    req->LeaseState != SMB2_LEASE_NONE_LE) {
8133                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8134                 lease_change_type = OPLOCK_READ_TO_NONE;
8135                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8136                             le32_to_cpu(lease->state),
8137                             le32_to_cpu(req->LeaseState));
8138         } else {
8139                 /* valid lease state changes */
8140                 err = STATUS_INVALID_DEVICE_STATE;
8141                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8142                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8143                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
8144                         else
8145                                 lease_change_type = OPLOCK_READ_TO_NONE;
8146                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8147                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8148                                 lease_change_type = OPLOCK_WRITE_TO_READ;
8149                         else
8150                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8151                 } else {
8152                         lease_change_type = 0;
8153                 }
8154         }
8155
8156         switch (lease_change_type) {
8157         case OPLOCK_WRITE_TO_READ:
8158                 ret = opinfo_write_to_read(opinfo);
8159                 break;
8160         case OPLOCK_READ_HANDLE_TO_READ:
8161                 ret = opinfo_read_handle_to_read(opinfo);
8162                 break;
8163         case OPLOCK_WRITE_TO_NONE:
8164                 ret = opinfo_write_to_none(opinfo);
8165                 break;
8166         case OPLOCK_READ_TO_NONE:
8167                 ret = opinfo_read_to_none(opinfo);
8168                 break;
8169         default:
8170                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8171                             le32_to_cpu(lease->state),
8172                             le32_to_cpu(req->LeaseState));
8173         }
8174
8175         lease_state = lease->state;
8176         opinfo->op_state = OPLOCK_STATE_NONE;
8177         wake_up_interruptible_all(&opinfo->oplock_q);
8178         atomic_dec(&opinfo->breaking_cnt);
8179         wake_up_interruptible_all(&opinfo->oplock_brk);
8180         opinfo_put(opinfo);
8181
8182         if (ret < 0) {
8183                 rsp->hdr.Status = err;
8184                 goto err_out;
8185         }
8186
8187         rsp->StructureSize = cpu_to_le16(36);
8188         rsp->Reserved = 0;
8189         rsp->Flags = 0;
8190         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8191         rsp->LeaseState = lease_state;
8192         rsp->LeaseDuration = 0;
8193         inc_rfc1001_len(work->response_buf, 36);
8194         return;
8195
8196 err_out:
8197         opinfo->op_state = OPLOCK_STATE_NONE;
8198         wake_up_interruptible_all(&opinfo->oplock_q);
8199         atomic_dec(&opinfo->breaking_cnt);
8200         wake_up_interruptible_all(&opinfo->oplock_brk);
8201
8202         opinfo_put(opinfo);
8203         smb2_set_err_rsp(work);
8204 }
8205
8206 /**
8207  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8208  * @work:       smb work containing oplock/lease break command buffer
8209  *
8210  * Return:      0
8211  */
8212 int smb2_oplock_break(struct ksmbd_work *work)
8213 {
8214         struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
8215         struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
8216
8217         switch (le16_to_cpu(req->StructureSize)) {
8218         case OP_BREAK_STRUCT_SIZE_20:
8219                 smb20_oplock_break_ack(work);
8220                 break;
8221         case OP_BREAK_STRUCT_SIZE_21:
8222                 smb21_lease_break_ack(work);
8223                 break;
8224         default:
8225                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8226                             le16_to_cpu(req->StructureSize));
8227                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8228                 smb2_set_err_rsp(work);
8229         }
8230
8231         return 0;
8232 }
8233
8234 /**
8235  * smb2_notify() - handler for smb2 notify request
8236  * @work:   smb work containing notify command buffer
8237  *
8238  * Return:      0
8239  */
8240 int smb2_notify(struct ksmbd_work *work)
8241 {
8242         struct smb2_change_notify_req *req;
8243         struct smb2_change_notify_rsp *rsp;
8244
8245         WORK_BUFFERS(work, req, rsp);
8246
8247         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8248                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8249                 smb2_set_err_rsp(work);
8250                 return 0;
8251         }
8252
8253         smb2_set_err_rsp(work);
8254         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8255         return 0;
8256 }
8257
8258 /**
8259  * smb2_is_sign_req() - handler for checking packet signing status
8260  * @work:       smb work containing notify command buffer
8261  * @command:    SMB2 command id
8262  *
8263  * Return:      true if packed is signed, false otherwise
8264  */
8265 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8266 {
8267         struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8268
8269         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8270             command != SMB2_NEGOTIATE_HE &&
8271             command != SMB2_SESSION_SETUP_HE &&
8272             command != SMB2_OPLOCK_BREAK_HE)
8273                 return true;
8274
8275         return false;
8276 }
8277
8278 /**
8279  * smb2_check_sign_req() - handler for req packet sign processing
8280  * @work:   smb work containing notify command buffer
8281  *
8282  * Return:      1 on success, 0 otherwise
8283  */
8284 int smb2_check_sign_req(struct ksmbd_work *work)
8285 {
8286         struct smb2_hdr *hdr;
8287         char signature_req[SMB2_SIGNATURE_SIZE];
8288         char signature[SMB2_HMACSHA256_SIZE];
8289         struct kvec iov[1];
8290         size_t len;
8291
8292         hdr = smb2_get_msg(work->request_buf);
8293         if (work->next_smb2_rcv_hdr_off)
8294                 hdr = ksmbd_req_buf_next(work);
8295
8296         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8297                 len = get_rfc1002_len(work->request_buf);
8298         else if (hdr->NextCommand)
8299                 len = le32_to_cpu(hdr->NextCommand);
8300         else
8301                 len = get_rfc1002_len(work->request_buf) -
8302                         work->next_smb2_rcv_hdr_off;
8303
8304         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8305         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8306
8307         iov[0].iov_base = (char *)&hdr->ProtocolId;
8308         iov[0].iov_len = len;
8309
8310         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8311                                 signature))
8312                 return 0;
8313
8314         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8315                 pr_err("bad smb2 signature\n");
8316                 return 0;
8317         }
8318
8319         return 1;
8320 }
8321
8322 /**
8323  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8324  * @work:   smb work containing notify command buffer
8325  *
8326  */
8327 void smb2_set_sign_rsp(struct ksmbd_work *work)
8328 {
8329         struct smb2_hdr *hdr;
8330         struct smb2_hdr *req_hdr;
8331         char signature[SMB2_HMACSHA256_SIZE];
8332         struct kvec iov[2];
8333         size_t len;
8334         int n_vec = 1;
8335
8336         hdr = smb2_get_msg(work->response_buf);
8337         if (work->next_smb2_rsp_hdr_off)
8338                 hdr = ksmbd_resp_buf_next(work);
8339
8340         req_hdr = ksmbd_req_buf_next(work);
8341
8342         if (!work->next_smb2_rsp_hdr_off) {
8343                 len = get_rfc1002_len(work->response_buf);
8344                 if (req_hdr->NextCommand)
8345                         len = ALIGN(len, 8);
8346         } else {
8347                 len = get_rfc1002_len(work->response_buf) -
8348                         work->next_smb2_rsp_hdr_off;
8349                 len = ALIGN(len, 8);
8350         }
8351
8352         if (req_hdr->NextCommand)
8353                 hdr->NextCommand = cpu_to_le32(len);
8354
8355         hdr->Flags |= SMB2_FLAGS_SIGNED;
8356         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8357
8358         iov[0].iov_base = (char *)&hdr->ProtocolId;
8359         iov[0].iov_len = len;
8360
8361         if (work->aux_payload_sz) {
8362                 iov[0].iov_len -= work->aux_payload_sz;
8363
8364                 iov[1].iov_base = work->aux_payload_buf;
8365                 iov[1].iov_len = work->aux_payload_sz;
8366                 n_vec++;
8367         }
8368
8369         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8370                                  signature))
8371                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8372 }
8373
8374 /**
8375  * smb3_check_sign_req() - handler for req packet sign processing
8376  * @work:   smb work containing notify command buffer
8377  *
8378  * Return:      1 on success, 0 otherwise
8379  */
8380 int smb3_check_sign_req(struct ksmbd_work *work)
8381 {
8382         struct ksmbd_conn *conn = work->conn;
8383         char *signing_key;
8384         struct smb2_hdr *hdr;
8385         struct channel *chann;
8386         char signature_req[SMB2_SIGNATURE_SIZE];
8387         char signature[SMB2_CMACAES_SIZE];
8388         struct kvec iov[1];
8389         size_t len;
8390
8391         hdr = smb2_get_msg(work->request_buf);
8392         if (work->next_smb2_rcv_hdr_off)
8393                 hdr = ksmbd_req_buf_next(work);
8394
8395         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8396                 len = get_rfc1002_len(work->request_buf);
8397         else if (hdr->NextCommand)
8398                 len = le32_to_cpu(hdr->NextCommand);
8399         else
8400                 len = get_rfc1002_len(work->request_buf) -
8401                         work->next_smb2_rcv_hdr_off;
8402
8403         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8404                 signing_key = work->sess->smb3signingkey;
8405         } else {
8406                 read_lock(&work->sess->chann_lock);
8407                 chann = lookup_chann_list(work->sess, conn);
8408                 if (!chann) {
8409                         read_unlock(&work->sess->chann_lock);
8410                         return 0;
8411                 }
8412                 signing_key = chann->smb3signingkey;
8413                 read_unlock(&work->sess->chann_lock);
8414         }
8415
8416         if (!signing_key) {
8417                 pr_err("SMB3 signing key is not generated\n");
8418                 return 0;
8419         }
8420
8421         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8422         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8423         iov[0].iov_base = (char *)&hdr->ProtocolId;
8424         iov[0].iov_len = len;
8425
8426         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8427                 return 0;
8428
8429         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8430                 pr_err("bad smb2 signature\n");
8431                 return 0;
8432         }
8433
8434         return 1;
8435 }
8436
8437 /**
8438  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8439  * @work:   smb work containing notify command buffer
8440  *
8441  */
8442 void smb3_set_sign_rsp(struct ksmbd_work *work)
8443 {
8444         struct ksmbd_conn *conn = work->conn;
8445         struct smb2_hdr *req_hdr, *hdr;
8446         struct channel *chann;
8447         char signature[SMB2_CMACAES_SIZE];
8448         struct kvec iov[2];
8449         int n_vec = 1;
8450         size_t len;
8451         char *signing_key;
8452
8453         hdr = smb2_get_msg(work->response_buf);
8454         if (work->next_smb2_rsp_hdr_off)
8455                 hdr = ksmbd_resp_buf_next(work);
8456
8457         req_hdr = ksmbd_req_buf_next(work);
8458
8459         if (!work->next_smb2_rsp_hdr_off) {
8460                 len = get_rfc1002_len(work->response_buf);
8461                 if (req_hdr->NextCommand)
8462                         len = ALIGN(len, 8);
8463         } else {
8464                 len = get_rfc1002_len(work->response_buf) -
8465                         work->next_smb2_rsp_hdr_off;
8466                 len = ALIGN(len, 8);
8467         }
8468
8469         if (conn->binding == false &&
8470             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8471                 signing_key = work->sess->smb3signingkey;
8472         } else {
8473                 read_lock(&work->sess->chann_lock);
8474                 chann = lookup_chann_list(work->sess, work->conn);
8475                 if (!chann) {
8476                         read_unlock(&work->sess->chann_lock);
8477                         return;
8478                 }
8479                 signing_key = chann->smb3signingkey;
8480                 read_unlock(&work->sess->chann_lock);
8481         }
8482
8483         if (!signing_key)
8484                 return;
8485
8486         if (req_hdr->NextCommand)
8487                 hdr->NextCommand = cpu_to_le32(len);
8488
8489         hdr->Flags |= SMB2_FLAGS_SIGNED;
8490         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8491         iov[0].iov_base = (char *)&hdr->ProtocolId;
8492         iov[0].iov_len = len;
8493         if (work->aux_payload_sz) {
8494                 iov[0].iov_len -= work->aux_payload_sz;
8495                 iov[1].iov_base = work->aux_payload_buf;
8496                 iov[1].iov_len = work->aux_payload_sz;
8497                 n_vec++;
8498         }
8499
8500         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature))
8501                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8502 }
8503
8504 /**
8505  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8506  * @work:   smb work containing response buffer
8507  *
8508  */
8509 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8510 {
8511         struct ksmbd_conn *conn = work->conn;
8512         struct ksmbd_session *sess = work->sess;
8513         struct smb2_hdr *req, *rsp;
8514
8515         if (conn->dialect != SMB311_PROT_ID)
8516                 return;
8517
8518         WORK_BUFFERS(work, req, rsp);
8519
8520         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8521             conn->preauth_info)
8522                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8523                                                  conn->preauth_info->Preauth_HashValue);
8524
8525         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8526                 __u8 *hash_value;
8527
8528                 if (conn->binding) {
8529                         struct preauth_session *preauth_sess;
8530
8531                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8532                         if (!preauth_sess)
8533                                 return;
8534                         hash_value = preauth_sess->Preauth_HashValue;
8535                 } else {
8536                         hash_value = sess->Preauth_HashValue;
8537                         if (!hash_value)
8538                                 return;
8539                 }
8540                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8541                                                  hash_value);
8542         }
8543 }
8544
8545 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8546 {
8547         struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8548         struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8549         unsigned int orig_len = get_rfc1002_len(old_buf);
8550
8551         /* tr_buf must be cleared by the caller */
8552         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8553         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8554         tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8555         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8556             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8557                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8558         else
8559                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8560         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8561         inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8562         inc_rfc1001_len(tr_buf, orig_len);
8563 }
8564
8565 int smb3_encrypt_resp(struct ksmbd_work *work)
8566 {
8567         char *buf = work->response_buf;
8568         struct kvec iov[3];
8569         int rc = -ENOMEM;
8570         int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0);
8571
8572         if (ARRAY_SIZE(iov) < rq_nvec)
8573                 return -ENOMEM;
8574
8575         work->tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8576         if (!work->tr_buf)
8577                 return rc;
8578
8579         /* fill transform header */
8580         fill_transform_hdr(work->tr_buf, buf, work->conn->cipher_type);
8581
8582         iov[0].iov_base = work->tr_buf;
8583         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8584         buf_size += iov[0].iov_len - 4;
8585
8586         iov[1].iov_base = buf + 4;
8587         iov[1].iov_len = get_rfc1002_len(buf);
8588         if (work->aux_payload_sz) {
8589                 iov[1].iov_len = work->resp_hdr_sz - 4;
8590
8591                 iov[2].iov_base = work->aux_payload_buf;
8592                 iov[2].iov_len = work->aux_payload_sz;
8593                 buf_size += iov[2].iov_len;
8594         }
8595         buf_size += iov[1].iov_len;
8596         work->resp_hdr_sz = iov[1].iov_len;
8597
8598         rc = ksmbd_crypt_message(work, iov, rq_nvec, 1);
8599         if (rc)
8600                 return rc;
8601
8602         memmove(buf, iov[1].iov_base, iov[1].iov_len);
8603         *(__be32 *)work->tr_buf = cpu_to_be32(buf_size);
8604
8605         return rc;
8606 }
8607
8608 bool smb3_is_transform_hdr(void *buf)
8609 {
8610         struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8611
8612         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8613 }
8614
8615 int smb3_decrypt_req(struct ksmbd_work *work)
8616 {
8617         struct ksmbd_session *sess;
8618         char *buf = work->request_buf;
8619         unsigned int pdu_length = get_rfc1002_len(buf);
8620         struct kvec iov[2];
8621         int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8622         struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8623         int rc = 0;
8624
8625         if (buf_data_size < sizeof(struct smb2_hdr)) {
8626                 pr_err("Transform message is too small (%u)\n",
8627                        pdu_length);
8628                 return -ECONNABORTED;
8629         }
8630
8631         if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8632                 pr_err("Transform message is broken\n");
8633                 return -ECONNABORTED;
8634         }
8635
8636         sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8637         if (!sess) {
8638                 pr_err("invalid session id(%llx) in transform header\n",
8639                        le64_to_cpu(tr_hdr->SessionId));
8640                 return -ECONNABORTED;
8641         }
8642
8643         iov[0].iov_base = buf;
8644         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8645         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8646         iov[1].iov_len = buf_data_size;
8647         rc = ksmbd_crypt_message(work, iov, 2, 0);
8648         if (rc)
8649                 return rc;
8650
8651         memmove(buf + 4, iov[1].iov_base, buf_data_size);
8652         *(__be32 *)buf = cpu_to_be32(buf_data_size);
8653
8654         return rc;
8655 }
8656
8657 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8658 {
8659         struct ksmbd_conn *conn = work->conn;
8660         struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8661
8662         if (conn->dialect < SMB30_PROT_ID)
8663                 return false;
8664
8665         if (work->next_smb2_rcv_hdr_off)
8666                 rsp = ksmbd_resp_buf_next(work);
8667
8668         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8669             rsp->Status == STATUS_SUCCESS)
8670                 return true;
8671         return false;
8672 }