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
  15 #include "glob.h"
  16 #include "smb2pdu.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 = work->request_buf;
  48                 *rsp = 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 = work->request_buf;
  97         int tree_id;
  98
  99         work->tcon = NULL;
 100         if (work->conn->ops->get_cmd_val(work) == SMB2_TREE_CONNECT_HE ||
 101             work->conn->ops->get_cmd_val(work) ==  SMB2_CANCEL_HE ||
 102             work->conn->ops->get_cmd_val(work) ==  SMB2_LOGOFF_HE) {
 103                 ksmbd_debug(SMB, "skip to check tree connect request\n");
 104                 return 0;
 105         }
 106
 107         if (xa_empty(&work->sess->tree_conns)) {
 108                 ksmbd_debug(SMB, "NO tree connected\n");
 109                 return -ENOENT;
 110         }
 111
 112         tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
 113         work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
 114         if (!work->tcon) {
 115                 pr_err("Invalid tid %d\n", tree_id);
 116                 return -EINVAL;
 117         }
 118
 119         return 1;
 120 }
 121
 122 /**
 123  * smb2_set_err_rsp() - set error response code on smb response
 124  * @work:       smb work containing response buffer
 125  */
 126 void smb2_set_err_rsp(struct ksmbd_work *work)
 127 {
 128         struct smb2_err_rsp *err_rsp;
 129
 130         if (work->next_smb2_rcv_hdr_off)
 131                 err_rsp = ksmbd_resp_buf_next(work);
 132         else
 133                 err_rsp = work->response_buf;
 134
 135         if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
 136                 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
 137                 err_rsp->ErrorContextCount = 0;
 138                 err_rsp->Reserved = 0;
 139                 err_rsp->ByteCount = 0;
 140                 err_rsp->ErrorData[0] = 0;
 141                 inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2);
 142         }
 143 }
 144
 145 /**
 146  * is_smb2_neg_cmd() - is it smb2 negotiation command
 147  * @work:       smb work containing smb header
 148  *
 149  * Return:      true if smb2 negotiation command, otherwise false
 150  */
 151 bool is_smb2_neg_cmd(struct ksmbd_work *work)
 152 {
 153         struct smb2_hdr *hdr = work->request_buf;
 154
 155         /* is it SMB2 header ? */
 156         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 157                 return false;
 158
 159         /* make sure it is request not response message */
 160         if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
 161                 return false;
 162
 163         if (hdr->Command != SMB2_NEGOTIATE)
 164                 return false;
 165
 166         return true;
 167 }
 168
 169 /**
 170  * is_smb2_rsp() - is it smb2 response
 171  * @work:       smb work containing smb response buffer
 172  *
 173  * Return:      true if smb2 response, otherwise false
 174  */
 175 bool is_smb2_rsp(struct ksmbd_work *work)
 176 {
 177         struct smb2_hdr *hdr = work->response_buf;
 178
 179         /* is it SMB2 header ? */
 180         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 181                 return false;
 182
 183         /* make sure it is response not request message */
 184         if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
 185                 return false;
 186
 187         return true;
 188 }
 189
 190 /**
 191  * get_smb2_cmd_val() - get smb command code from smb header
 192  * @work:       smb work containing smb request buffer
 193  *
 194  * Return:      smb2 request command value
 195  */
 196 u16 get_smb2_cmd_val(struct ksmbd_work *work)
 197 {
 198         struct smb2_hdr *rcv_hdr;
 199
 200         if (work->next_smb2_rcv_hdr_off)
 201                 rcv_hdr = ksmbd_req_buf_next(work);
 202         else
 203                 rcv_hdr = work->request_buf;
 204         return le16_to_cpu(rcv_hdr->Command);
 205 }
 206
 207 /**
 208  * set_smb2_rsp_status() - set error response code on smb2 header
 209  * @work:       smb work containing response buffer
 210  * @err:        error response code
 211  */
 212 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
 213 {
 214         struct smb2_hdr *rsp_hdr;
 215
 216         if (work->next_smb2_rcv_hdr_off)
 217                 rsp_hdr = ksmbd_resp_buf_next(work);
 218         else
 219                 rsp_hdr = work->response_buf;
 220         rsp_hdr->Status = err;
 221         smb2_set_err_rsp(work);
 222 }
 223
 224 /**
 225  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
 226  * @work:       smb work containing smb request buffer
 227  *
 228  * smb2 negotiate response is sent in reply of smb1 negotiate command for
 229  * dialect auto-negotiation.
 230  */
 231 int init_smb2_neg_rsp(struct ksmbd_work *work)
 232 {
 233         struct smb2_hdr *rsp_hdr;
 234         struct smb2_negotiate_rsp *rsp;
 235         struct ksmbd_conn *conn = work->conn;
 236
 237         if (conn->need_neg == false)
 238                 return -EINVAL;
 239
 240         rsp_hdr = work->response_buf;
 241
 242         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 243
 244         rsp_hdr->smb2_buf_length =
 245                 cpu_to_be32(smb2_hdr_size_no_buflen(conn->vals));
 246
 247         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 248         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 249         rsp_hdr->CreditRequest = cpu_to_le16(2);
 250         rsp_hdr->Command = SMB2_NEGOTIATE;
 251         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 252         rsp_hdr->NextCommand = 0;
 253         rsp_hdr->MessageId = 0;
 254         rsp_hdr->Id.SyncId.ProcessId = 0;
 255         rsp_hdr->Id.SyncId.TreeId = 0;
 256         rsp_hdr->SessionId = 0;
 257         memset(rsp_hdr->Signature, 0, 16);
 258
 259         rsp = work->response_buf;
 260
 261         WARN_ON(ksmbd_conn_good(work));
 262
 263         rsp->StructureSize = cpu_to_le16(65);
 264         ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
 265         rsp->DialectRevision = cpu_to_le16(conn->dialect);
 266         /* Not setting conn guid rsp->ServerGUID, as it
 267          * not used by client for identifying connection
 268          */
 269         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
 270         /* Default Max Message Size till SMB2.0, 64K*/
 271         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
 272         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 273         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 274
 275         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
 276         rsp->ServerStartTime = 0;
 277
 278         rsp->SecurityBufferOffset = cpu_to_le16(128);
 279         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
 280         ksmbd_copy_gss_neg_header(((char *)(&rsp->hdr) +
 281                 sizeof(rsp->hdr.smb2_buf_length)) +
 282                 le16_to_cpu(rsp->SecurityBufferOffset));
 283         inc_rfc1001_len(rsp, sizeof(struct smb2_negotiate_rsp) -
 284                 sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
 285                 AUTH_GSS_LENGTH);
 286         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
 287         if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
 288                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
 289         conn->use_spnego = true;
 290
 291         ksmbd_conn_set_need_negotiate(work);
 292         return 0;
 293 }
 294
 295 /**
 296  * smb2_set_rsp_credits() - set number of credits in response buffer
 297  * @work:       smb work containing smb response buffer
 298  */
 299 int smb2_set_rsp_credits(struct ksmbd_work *work)
 300 {
 301         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 302         struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
 303         struct ksmbd_conn *conn = work->conn;
 304         unsigned short credits_requested;
 305         unsigned short credit_charge, credits_granted = 0;
 306         unsigned short aux_max, aux_credits;
 307
 308         if (work->send_no_response)
 309                 return 0;
 310
 311         hdr->CreditCharge = req_hdr->CreditCharge;
 312
 313         if (conn->total_credits > conn->max_credits) {
 314                 hdr->CreditRequest = 0;
 315                 pr_err("Total credits overflow: %d\n", conn->total_credits);
 316                 return -EINVAL;
 317         }
 318
 319         credit_charge = max_t(unsigned short,
 320                               le16_to_cpu(req_hdr->CreditCharge), 1);
 321         credits_requested = max_t(unsigned short,
 322                                   le16_to_cpu(req_hdr->CreditRequest), 1);
 323
 324         /* according to smb2.credits smbtorture, Windows server
 325          * 2016 or later grant up to 8192 credits at once.
 326          *
 327          * TODO: Need to adjuct CreditRequest value according to
 328          * current cpu load
 329          */
 330         aux_credits = credits_requested - 1;
 331         if (hdr->Command == SMB2_NEGOTIATE)
 332                 aux_max = 0;
 333         else
 334                 aux_max = conn->max_credits - credit_charge;
 335         aux_credits = min_t(unsigned short, aux_credits, aux_max);
 336         credits_granted = credit_charge + aux_credits;
 337
 338         if (conn->max_credits - conn->total_credits < credits_granted)
 339                 credits_granted = conn->max_credits -
 340                         conn->total_credits;
 341
 342         conn->total_credits += credits_granted;
 343         work->credits_granted += credits_granted;
 344
 345         if (!req_hdr->NextCommand) {
 346                 /* Update CreditRequest in last request */
 347                 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
 348         }
 349         ksmbd_debug(SMB,
 350                     "credits: requested[%d] granted[%d] total_granted[%d]\n",
 351                     credits_requested, credits_granted,
 352                     conn->total_credits);
 353         return 0;
 354 }
 355
 356 /**
 357  * init_chained_smb2_rsp() - initialize smb2 chained response
 358  * @work:       smb work containing smb response buffer
 359  */
 360 static void init_chained_smb2_rsp(struct ksmbd_work *work)
 361 {
 362         struct smb2_hdr *req = ksmbd_req_buf_next(work);
 363         struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
 364         struct smb2_hdr *rsp_hdr;
 365         struct smb2_hdr *rcv_hdr;
 366         int next_hdr_offset = 0;
 367         int len, new_len;
 368
 369         /* Len of this response = updated RFC len - offset of previous cmd
 370          * in the compound rsp
 371          */
 372
 373         /* Storing the current local FID which may be needed by subsequent
 374          * command in the compound request
 375          */
 376         if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
 377                 work->compound_fid =
 378                         le64_to_cpu(((struct smb2_create_rsp *)rsp)->
 379                                 VolatileFileId);
 380                 work->compound_pfid =
 381                         le64_to_cpu(((struct smb2_create_rsp *)rsp)->
 382                                 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, ((sizeof(struct smb2_hdr) - 4)
 391                         + 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 + 4, 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 = 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 = work->response_buf;
 487         struct smb2_hdr *rcv_hdr = work->request_buf;
 488         struct ksmbd_conn *conn = work->conn;
 489
 490         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 491         rsp_hdr->smb2_buf_length =
 492                 cpu_to_be32(smb2_hdr_size_no_buflen(conn->vals));
 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 = 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 = 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                         sz = large_sz;
 542         }
 543
 544         /* allocate large response buf for chained commands */
 545         if (le32_to_cpu(hdr->NextCommand) > 0)
 546                 sz = large_sz;
 547
 548         work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
 549         if (!work->response_buf)
 550                 return -ENOMEM;
 551
 552         work->response_sz = sz;
 553         return 0;
 554 }
 555
 556 /**
 557  * smb2_check_user_session() - check for valid session for a user
 558  * @work:       smb work containing smb request buffer
 559  *
 560  * Return:      0 on success, otherwise error
 561  */
 562 int smb2_check_user_session(struct ksmbd_work *work)
 563 {
 564         struct smb2_hdr *req_hdr = work->request_buf;
 565         struct ksmbd_conn *conn = work->conn;
 566         unsigned int cmd = conn->ops->get_cmd_val(work);
 567         unsigned long long sess_id;
 568
 569         work->sess = NULL;
 570         /*
 571          * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
 572          * require a session id, so no need to validate user session's for
 573          * these commands.
 574          */
 575         if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
 576             cmd == SMB2_SESSION_SETUP_HE)
 577                 return 0;
 578
 579         if (!ksmbd_conn_good(work))
 580                 return -EINVAL;
 581
 582         sess_id = le64_to_cpu(req_hdr->SessionId);
 583         /* Check for validity of user session */
 584         work->sess = ksmbd_session_lookup_all(conn, sess_id);
 585         if (work->sess)
 586                 return 1;
 587         ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 588         return -EINVAL;
 589 }
 590
 591 static void destroy_previous_session(struct ksmbd_user *user, u64 id)
 592 {
 593         struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
 594         struct ksmbd_user *prev_user;
 595
 596         if (!prev_sess)
 597                 return;
 598
 599         prev_user = prev_sess->user;
 600
 601         if (!prev_user ||
 602             strcmp(user->name, prev_user->name) ||
 603             user->passkey_sz != prev_user->passkey_sz ||
 604             memcmp(user->passkey, prev_user->passkey, user->passkey_sz)) {
 605                 put_session(prev_sess);
 606                 return;
 607         }
 608
 609         put_session(prev_sess);
 610         ksmbd_session_destroy(prev_sess);
 611 }
 612
 613 /**
 614  * smb2_get_name() - get filename string from on the wire smb format
 615  * @share:      ksmbd_share_config pointer
 616  * @src:        source buffer
 617  * @maxlen:     maxlen of source string
 618  * @nls_table:  nls_table pointer
 619  *
 620  * Return:      matching converted filename on success, otherwise error ptr
 621  */
 622 static char *
 623 smb2_get_name(struct ksmbd_share_config *share, const char *src,
 624               const int maxlen, struct nls_table *local_nls)
 625 {
 626         char *name;
 627
 628         name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
 629         if (IS_ERR(name)) {
 630                 pr_err("failed to get name %ld\n", PTR_ERR(name));
 631                 return name;
 632         }
 633
 634         ksmbd_conv_path_to_unix(name);
 635         ksmbd_strip_last_slash(name);
 636         return name;
 637 }
 638
 639 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
 640 {
 641         struct smb2_hdr *rsp_hdr;
 642         struct ksmbd_conn *conn = work->conn;
 643         int id;
 644
 645         rsp_hdr = work->response_buf;
 646         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 647
 648         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 649         if (id < 0) {
 650                 pr_err("Failed to alloc async message id\n");
 651                 return id;
 652         }
 653         work->syncronous = false;
 654         work->async_id = id;
 655         rsp_hdr->Id.AsyncId = cpu_to_le64(id);
 656
 657         ksmbd_debug(SMB,
 658                     "Send interim Response to inform async request id : %d\n",
 659                     work->async_id);
 660
 661         work->cancel_fn = fn;
 662         work->cancel_argv = arg;
 663
 664         if (list_empty(&work->async_request_entry)) {
 665                 spin_lock(&conn->request_lock);
 666                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 667                 spin_unlock(&conn->request_lock);
 668         }
 669
 670         return 0;
 671 }
 672
 673 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 674 {
 675         struct smb2_hdr *rsp_hdr;
 676
 677         rsp_hdr = work->response_buf;
 678         smb2_set_err_rsp(work);
 679         rsp_hdr->Status = status;
 680
 681         work->multiRsp = 1;
 682         ksmbd_conn_write(work);
 683         rsp_hdr->Status = 0;
 684         work->multiRsp = 0;
 685 }
 686
 687 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 688 {
 689         if (S_ISDIR(mode) || S_ISREG(mode))
 690                 return 0;
 691
 692         if (S_ISLNK(mode))
 693                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 694         else if (S_ISFIFO(mode))
 695                 return IO_REPARSE_TAG_LX_FIFO_LE;
 696         else if (S_ISSOCK(mode))
 697                 return IO_REPARSE_TAG_AF_UNIX_LE;
 698         else if (S_ISCHR(mode))
 699                 return IO_REPARSE_TAG_LX_CHR_LE;
 700         else if (S_ISBLK(mode))
 701                 return IO_REPARSE_TAG_LX_BLK_LE;
 702
 703         return 0;
 704 }
 705
 706 /**
 707  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 708  * @stat:       kstat containing file mode
 709  * @attribute:  attribute flags
 710  *
 711  * Return:      converted dos mode
 712  */
 713 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 714 {
 715         int attr = 0;
 716
 717         if (S_ISDIR(stat->mode)) {
 718                 attr = ATTR_DIRECTORY |
 719                         (attribute & (ATTR_HIDDEN | ATTR_SYSTEM));
 720         } else {
 721                 attr = (attribute & 0x00005137) | ATTR_ARCHIVE;
 722                 attr &= ~(ATTR_DIRECTORY);
 723                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 724                                 FILE_SUPPORTS_SPARSE_FILES))
 725                         attr |= ATTR_SPARSE;
 726
 727                 if (smb2_get_reparse_tag_special_file(stat->mode))
 728                         attr |= ATTR_REPARSE;
 729         }
 730
 731         return attr;
 732 }
 733
 734 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 735                                __le16 hash_id)
 736 {
 737         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 738         pneg_ctxt->DataLength = cpu_to_le16(38);
 739         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 740         pneg_ctxt->Reserved = cpu_to_le32(0);
 741         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 742         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 743         pneg_ctxt->HashAlgorithms = hash_id;
 744 }
 745
 746 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 747                                __le16 cipher_type)
 748 {
 749         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 750         pneg_ctxt->DataLength = cpu_to_le16(4);
 751         pneg_ctxt->Reserved = cpu_to_le32(0);
 752         pneg_ctxt->CipherCount = cpu_to_le16(1);
 753         pneg_ctxt->Ciphers[0] = cipher_type;
 754 }
 755
 756 static void build_compression_ctxt(struct smb2_compression_ctx *pneg_ctxt,
 757                                    __le16 comp_algo)
 758 {
 759         pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
 760         pneg_ctxt->DataLength =
 761                 cpu_to_le16(sizeof(struct smb2_compression_ctx)
 762                         - sizeof(struct smb2_neg_context));
 763         pneg_ctxt->Reserved = cpu_to_le32(0);
 764         pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(1);
 765         pneg_ctxt->Reserved1 = cpu_to_le32(0);
 766         pneg_ctxt->CompressionAlgorithms[0] = comp_algo;
 767 }
 768
 769 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 770                                 __le16 sign_algo)
 771 {
 772         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 773         pneg_ctxt->DataLength =
 774                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 775                         - sizeof(struct smb2_neg_context));
 776         pneg_ctxt->Reserved = cpu_to_le32(0);
 777         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 778         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 779 }
 780
 781 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 782 {
 783         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 784         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 785         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 786         pneg_ctxt->Name[0] = 0x93;
 787         pneg_ctxt->Name[1] = 0xAD;
 788         pneg_ctxt->Name[2] = 0x25;
 789         pneg_ctxt->Name[3] = 0x50;
 790         pneg_ctxt->Name[4] = 0x9C;
 791         pneg_ctxt->Name[5] = 0xB4;
 792         pneg_ctxt->Name[6] = 0x11;
 793         pneg_ctxt->Name[7] = 0xE7;
 794         pneg_ctxt->Name[8] = 0xB4;
 795         pneg_ctxt->Name[9] = 0x23;
 796         pneg_ctxt->Name[10] = 0x83;
 797         pneg_ctxt->Name[11] = 0xDE;
 798         pneg_ctxt->Name[12] = 0x96;
 799         pneg_ctxt->Name[13] = 0x8B;
 800         pneg_ctxt->Name[14] = 0xCD;
 801         pneg_ctxt->Name[15] = 0x7C;
 802 }
 803
 804 static void assemble_neg_contexts(struct ksmbd_conn *conn,
 805                                   struct smb2_negotiate_rsp *rsp)
 806 {
 807         /* +4 is to account for the RFC1001 len field */
 808         char *pneg_ctxt = (char *)rsp +
 809                         le32_to_cpu(rsp->NegotiateContextOffset) + 4;
 810         int neg_ctxt_cnt = 1;
 811         int ctxt_size;
 812
 813         ksmbd_debug(SMB,
 814                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 815         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 816                            conn->preauth_info->Preauth_HashId);
 817         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 818         inc_rfc1001_len(rsp, AUTH_GSS_PADDING);
 819         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 820         /* Round to 8 byte boundary */
 821         pneg_ctxt += round_up(sizeof(struct smb2_preauth_neg_context), 8);
 822
 823         if (conn->cipher_type) {
 824                 ctxt_size = round_up(ctxt_size, 8);
 825                 ksmbd_debug(SMB,
 826                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 827                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt,
 828                                    conn->cipher_type);
 829                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 830                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 831                 /* Round to 8 byte boundary */
 832                 pneg_ctxt +=
 833                         round_up(sizeof(struct smb2_encryption_neg_context) + 2,
 834                                  8);
 835         }
 836
 837         if (conn->compress_algorithm) {
 838                 ctxt_size = round_up(ctxt_size, 8);
 839                 ksmbd_debug(SMB,
 840                             "assemble SMB2_COMPRESSION_CAPABILITIES context\n");
 841                 /* Temporarily set to SMB3_COMPRESS_NONE */
 842                 build_compression_ctxt((struct smb2_compression_ctx *)pneg_ctxt,
 843                                        conn->compress_algorithm);
 844                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 845                 ctxt_size += sizeof(struct smb2_compression_ctx) + 2;
 846                 /* Round to 8 byte boundary */
 847                 pneg_ctxt += round_up(sizeof(struct smb2_compression_ctx) + 2,
 848                                       8);
 849         }
 850
 851         if (conn->posix_ext_supported) {
 852                 ctxt_size = round_up(ctxt_size, 8);
 853                 ksmbd_debug(SMB,
 854                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 855                 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
 856                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 857                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 858                 /* Round to 8 byte boundary */
 859                 pneg_ctxt += round_up(sizeof(struct smb2_posix_neg_context), 8);
 860         }
 861
 862         if (conn->signing_negotiated) {
 863                 ctxt_size = round_up(ctxt_size, 8);
 864                 ksmbd_debug(SMB,
 865                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 866                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)pneg_ctxt,
 867                                     conn->signing_algorithm);
 868                 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
 869                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 870         }
 871
 872         inc_rfc1001_len(rsp, ctxt_size);
 873 }
 874
 875 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 876                                   struct smb2_preauth_neg_context *pneg_ctxt)
 877 {
 878         __le32 err = STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 879
 880         if (pneg_ctxt->HashAlgorithms == SMB2_PREAUTH_INTEGRITY_SHA512) {
 881                 conn->preauth_info->Preauth_HashId =
 882                         SMB2_PREAUTH_INTEGRITY_SHA512;
 883                 err = STATUS_SUCCESS;
 884         }
 885
 886         return err;
 887 }
 888
 889 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 890                                 struct smb2_encryption_neg_context *pneg_ctxt,
 891                                 int len_of_ctxts)
 892 {
 893         int cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 894         int i, cphs_size = cph_cnt * sizeof(__le16);
 895
 896         conn->cipher_type = 0;
 897
 898         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 899             len_of_ctxts) {
 900                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 901                 return;
 902         }
 903
 904         if (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION))
 905                 return;
 906
 907         for (i = 0; i < cph_cnt; i++) {
 908                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 909                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 910                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 911                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 912                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 913                                     pneg_ctxt->Ciphers[i]);
 914                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 915                         break;
 916                 }
 917         }
 918 }
 919
 920 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 921                                  struct smb2_compression_ctx *pneg_ctxt)
 922 {
 923         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 924 }
 925
 926 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 927                                  struct smb2_signing_capabilities *pneg_ctxt,
 928                                  int len_of_ctxts)
 929 {
 930         int sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 931         int i, sign_alos_size = sign_algo_cnt * sizeof(__le16);
 932
 933         conn->signing_negotiated = false;
 934
 935         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 936             len_of_ctxts) {
 937                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 938                 return;
 939         }
 940
 941         for (i = 0; i < sign_algo_cnt; i++) {
 942                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256 ||
 943                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC) {
 944                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
 945                                     pneg_ctxt->SigningAlgorithms[i]);
 946                         conn->signing_negotiated = true;
 947                         conn->signing_algorithm =
 948                                 pneg_ctxt->SigningAlgorithms[i];
 949                         break;
 950                 }
 951         }
 952 }
 953
 954 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
 955                                       struct smb2_negotiate_req *req)
 956 {
 957         /* +4 is to account for the RFC1001 len field */
 958         struct smb2_neg_context *pctx = (struct smb2_neg_context *)((char *)req + 4);
 959         int i = 0, len_of_ctxts;
 960         int offset = le32_to_cpu(req->NegotiateContextOffset);
 961         int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
 962         int len_of_smb = be32_to_cpu(req->hdr.smb2_buf_length);
 963         __le32 status = STATUS_INVALID_PARAMETER;
 964
 965         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
 966         if (len_of_smb <= offset) {
 967                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
 968                 return status;
 969         }
 970
 971         len_of_ctxts = len_of_smb - offset;
 972
 973         while (i++ < neg_ctxt_cnt) {
 974                 int clen;
 975
 976                 /* check that offset is not beyond end of SMB */
 977                 if (len_of_ctxts == 0)
 978                         break;
 979
 980                 if (len_of_ctxts < sizeof(struct smb2_neg_context))
 981                         break;
 982
 983                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
 984                 clen = le16_to_cpu(pctx->DataLength);
 985                 if (clen + sizeof(struct smb2_neg_context) > len_of_ctxts)
 986                         break;
 987
 988                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
 989                         ksmbd_debug(SMB,
 990                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 991                         if (conn->preauth_info->Preauth_HashId)
 992                                 break;
 993
 994                         status = decode_preauth_ctxt(conn,
 995                                                      (struct smb2_preauth_neg_context *)pctx);
 996                         if (status != STATUS_SUCCESS)
 997                                 break;
 998                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
 999                         ksmbd_debug(SMB,
1000                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1001                         if (conn->cipher_type)
1002                                 break;
1003
1004                         decode_encrypt_ctxt(conn,
1005                                             (struct smb2_encryption_neg_context *)pctx,
1006                                             len_of_ctxts);
1007                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1008                         ksmbd_debug(SMB,
1009                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1010                         if (conn->compress_algorithm)
1011                                 break;
1012
1013                         decode_compress_ctxt(conn,
1014                                              (struct smb2_compression_ctx *)pctx);
1015                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1016                         ksmbd_debug(SMB,
1017                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1018                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1019                         ksmbd_debug(SMB,
1020                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1021                         conn->posix_ext_supported = true;
1022                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1023                         ksmbd_debug(SMB,
1024                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1025                         decode_sign_cap_ctxt(conn,
1026                                              (struct smb2_signing_capabilities *)pctx,
1027                                              len_of_ctxts);
1028                 }
1029
1030                 /* offsets must be 8 byte aligned */
1031                 clen = (clen + 7) & ~0x7;
1032                 offset = clen + sizeof(struct smb2_neg_context);
1033                 len_of_ctxts -= clen + sizeof(struct smb2_neg_context);
1034         }
1035         return status;
1036 }
1037
1038 /**
1039  * smb2_handle_negotiate() - handler for smb2 negotiate command
1040  * @work:       smb work containing smb request buffer
1041  *
1042  * Return:      0
1043  */
1044 int smb2_handle_negotiate(struct ksmbd_work *work)
1045 {
1046         struct ksmbd_conn *conn = work->conn;
1047         struct smb2_negotiate_req *req = work->request_buf;
1048         struct smb2_negotiate_rsp *rsp = work->response_buf;
1049         int rc = 0;
1050         unsigned int smb2_buf_len, smb2_neg_size;
1051         __le32 status;
1052
1053         ksmbd_debug(SMB, "Received negotiate request\n");
1054         conn->need_neg = false;
1055         if (ksmbd_conn_good(work)) {
1056                 pr_err("conn->tcp_status is already in CifsGood State\n");
1057                 work->send_no_response = 1;
1058                 return rc;
1059         }
1060
1061         if (req->DialectCount == 0) {
1062                 pr_err("malformed packet\n");
1063                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1064                 rc = -EINVAL;
1065                 goto err_out;
1066         }
1067
1068         smb2_buf_len = get_rfc1002_len(work->request_buf);
1069         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects) - 4;
1070         if (smb2_neg_size > smb2_buf_len) {
1071                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1072                 rc = -EINVAL;
1073                 goto err_out;
1074         }
1075
1076         if (conn->dialect == SMB311_PROT_ID) {
1077                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1078
1079                 if (smb2_buf_len < nego_ctxt_off) {
1080                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1081                         rc = -EINVAL;
1082                         goto err_out;
1083                 }
1084
1085                 if (smb2_neg_size > nego_ctxt_off) {
1086                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1087                         rc = -EINVAL;
1088                         goto err_out;
1089                 }
1090
1091                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1092                     nego_ctxt_off) {
1093                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1094                         rc = -EINVAL;
1095                         goto err_out;
1096                 }
1097         } else {
1098                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1099                     smb2_buf_len) {
1100                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1101                         rc = -EINVAL;
1102                         goto err_out;
1103                 }
1104         }
1105
1106         conn->cli_cap = le32_to_cpu(req->Capabilities);
1107         switch (conn->dialect) {
1108         case SMB311_PROT_ID:
1109                 conn->preauth_info =
1110                         kzalloc(sizeof(struct preauth_integrity_info),
1111                                 GFP_KERNEL);
1112                 if (!conn->preauth_info) {
1113                         rc = -ENOMEM;
1114                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1115                         goto err_out;
1116                 }
1117
1118                 status = deassemble_neg_contexts(conn, req);
1119                 if (status != STATUS_SUCCESS) {
1120                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1121                                status);
1122                         rsp->hdr.Status = status;
1123                         rc = -EINVAL;
1124                         goto err_out;
1125                 }
1126
1127                 rc = init_smb3_11_server(conn);
1128                 if (rc < 0) {
1129                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1130                         goto err_out;
1131                 }
1132
1133                 ksmbd_gen_preauth_integrity_hash(conn,
1134                                                  work->request_buf,
1135                                                  conn->preauth_info->Preauth_HashValue);
1136                 rsp->NegotiateContextOffset =
1137                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1138                 assemble_neg_contexts(conn, rsp);
1139                 break;
1140         case SMB302_PROT_ID:
1141                 init_smb3_02_server(conn);
1142                 break;
1143         case SMB30_PROT_ID:
1144                 init_smb3_0_server(conn);
1145                 break;
1146         case SMB21_PROT_ID:
1147                 init_smb2_1_server(conn);
1148                 break;
1149         case SMB2X_PROT_ID:
1150         case BAD_PROT_ID:
1151         default:
1152                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1153                             conn->dialect);
1154                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1155                 rc = -EINVAL;
1156                 goto err_out;
1157         }
1158         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1159
1160         /* For stats */
1161         conn->connection_type = conn->dialect;
1162
1163         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1164         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1165         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1166
1167         memcpy(conn->ClientGUID, req->ClientGUID,
1168                         SMB2_CLIENT_GUID_SIZE);
1169         conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1170
1171         rsp->StructureSize = cpu_to_le16(65);
1172         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1173         /* Not setting conn guid rsp->ServerGUID, as it
1174          * not used by client for identifying server
1175          */
1176         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1177
1178         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1179         rsp->ServerStartTime = 0;
1180         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1181                     le32_to_cpu(rsp->NegotiateContextOffset),
1182                     le16_to_cpu(rsp->NegotiateContextCount));
1183
1184         rsp->SecurityBufferOffset = cpu_to_le16(128);
1185         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1186         ksmbd_copy_gss_neg_header(((char *)(&rsp->hdr) +
1187                                   sizeof(rsp->hdr.smb2_buf_length)) +
1188                                    le16_to_cpu(rsp->SecurityBufferOffset));
1189         inc_rfc1001_len(rsp, sizeof(struct smb2_negotiate_rsp) -
1190                         sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
1191                          AUTH_GSS_LENGTH);
1192         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1193         conn->use_spnego = true;
1194
1195         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1196              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1197             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1198                 conn->sign = true;
1199         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1200                 server_conf.enforced_signing = true;
1201                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1202                 conn->sign = true;
1203         }
1204
1205         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1206         ksmbd_conn_set_need_negotiate(work);
1207
1208 err_out:
1209         if (rc < 0)
1210                 smb2_set_err_rsp(work);
1211
1212         return rc;
1213 }
1214
1215 static int alloc_preauth_hash(struct ksmbd_session *sess,
1216                               struct ksmbd_conn *conn)
1217 {
1218         if (sess->Preauth_HashValue)
1219                 return 0;
1220
1221         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1222                                           PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1223         if (!sess->Preauth_HashValue)
1224                 return -ENOMEM;
1225
1226         return 0;
1227 }
1228
1229 static int generate_preauth_hash(struct ksmbd_work *work)
1230 {
1231         struct ksmbd_conn *conn = work->conn;
1232         struct ksmbd_session *sess = work->sess;
1233         u8 *preauth_hash;
1234
1235         if (conn->dialect != SMB311_PROT_ID)
1236                 return 0;
1237
1238         if (conn->binding) {
1239                 struct preauth_session *preauth_sess;
1240
1241                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1242                 if (!preauth_sess) {
1243                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1244                         if (!preauth_sess)
1245                                 return -ENOMEM;
1246                 }
1247
1248                 preauth_hash = preauth_sess->Preauth_HashValue;
1249         } else {
1250                 if (!sess->Preauth_HashValue)
1251                         if (alloc_preauth_hash(sess, conn))
1252                                 return -ENOMEM;
1253                 preauth_hash = sess->Preauth_HashValue;
1254         }
1255
1256         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1257         return 0;
1258 }
1259
1260 static int decode_negotiation_token(struct ksmbd_conn *conn,
1261                                     struct negotiate_message *negblob,
1262                                     size_t sz)
1263 {
1264         if (!conn->use_spnego)
1265                 return -EINVAL;
1266
1267         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1268                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1269                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1270                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1271                         conn->use_spnego = false;
1272                 }
1273         }
1274         return 0;
1275 }
1276
1277 static int ntlm_negotiate(struct ksmbd_work *work,
1278                           struct negotiate_message *negblob,
1279                           size_t negblob_len)
1280 {
1281         struct smb2_sess_setup_rsp *rsp = work->response_buf;
1282         struct challenge_message *chgblob;
1283         unsigned char *spnego_blob = NULL;
1284         u16 spnego_blob_len;
1285         char *neg_blob;
1286         int sz, rc;
1287
1288         ksmbd_debug(SMB, "negotiate phase\n");
1289         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->sess);
1290         if (rc)
1291                 return rc;
1292
1293         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1294         chgblob =
1295                 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1296         memset(chgblob, 0, sizeof(struct challenge_message));
1297
1298         if (!work->conn->use_spnego) {
1299                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->sess);
1300                 if (sz < 0)
1301                         return -ENOMEM;
1302
1303                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1304                 return 0;
1305         }
1306
1307         sz = sizeof(struct challenge_message);
1308         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1309
1310         neg_blob = kzalloc(sz, GFP_KERNEL);
1311         if (!neg_blob)
1312                 return -ENOMEM;
1313
1314         chgblob = (struct challenge_message *)neg_blob;
1315         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->sess);
1316         if (sz < 0) {
1317                 rc = -ENOMEM;
1318                 goto out;
1319         }
1320
1321         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1322                                            neg_blob, sz);
1323         if (rc) {
1324                 rc = -ENOMEM;
1325                 goto out;
1326         }
1327
1328         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1329         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1330         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1331
1332 out:
1333         kfree(spnego_blob);
1334         kfree(neg_blob);
1335         return rc;
1336 }
1337
1338 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1339                                                   struct smb2_sess_setup_req *req)
1340 {
1341         int sz;
1342
1343         if (conn->use_spnego && conn->mechToken)
1344                 return (struct authenticate_message *)conn->mechToken;
1345
1346         sz = le16_to_cpu(req->SecurityBufferOffset);
1347         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1348                                                + sz);
1349 }
1350
1351 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1352                                        struct smb2_sess_setup_req *req)
1353 {
1354         struct authenticate_message *authblob;
1355         struct ksmbd_user *user;
1356         char *name;
1357         unsigned int auth_msg_len, name_off, name_len, secbuf_len;
1358
1359         secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1360         if (secbuf_len < sizeof(struct authenticate_message)) {
1361                 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1362                 return NULL;
1363         }
1364         authblob = user_authblob(conn, req);
1365         name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1366         name_len = le16_to_cpu(authblob->UserName.Length);
1367         auth_msg_len = le16_to_cpu(req->SecurityBufferOffset) + secbuf_len;
1368
1369         if (auth_msg_len < (u64)name_off + name_len)
1370                 return NULL;
1371
1372         name = smb_strndup_from_utf16((const char *)authblob + name_off,
1373                                       name_len,
1374                                       true,
1375                                       conn->local_nls);
1376         if (IS_ERR(name)) {
1377                 pr_err("cannot allocate memory\n");
1378                 return NULL;
1379         }
1380
1381         ksmbd_debug(SMB, "session setup request for user %s\n", name);
1382         user = ksmbd_login_user(name);
1383         kfree(name);
1384         return user;
1385 }
1386
1387 static int ntlm_authenticate(struct ksmbd_work *work)
1388 {
1389         struct smb2_sess_setup_req *req = work->request_buf;
1390         struct smb2_sess_setup_rsp *rsp = work->response_buf;
1391         struct ksmbd_conn *conn = work->conn;
1392         struct ksmbd_session *sess = work->sess;
1393         struct channel *chann = NULL;
1394         struct ksmbd_user *user;
1395         u64 prev_id;
1396         int sz, rc;
1397
1398         ksmbd_debug(SMB, "authenticate phase\n");
1399         if (conn->use_spnego) {
1400                 unsigned char *spnego_blob;
1401                 u16 spnego_blob_len;
1402
1403                 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1404                                                     &spnego_blob_len,
1405                                                     0);
1406                 if (rc)
1407                         return -ENOMEM;
1408
1409                 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1410                 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1411                 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1412                 kfree(spnego_blob);
1413                 inc_rfc1001_len(rsp, spnego_blob_len - 1);
1414         }
1415
1416         user = session_user(conn, req);
1417         if (!user) {
1418                 ksmbd_debug(SMB, "Unknown user name or an error\n");
1419                 return -EPERM;
1420         }
1421
1422         /* Check for previous session */
1423         prev_id = le64_to_cpu(req->PreviousSessionId);
1424         if (prev_id && prev_id != sess->id)
1425                 destroy_previous_session(user, prev_id);
1426
1427         if (sess->state == SMB2_SESSION_VALID) {
1428                 /*
1429                  * Reuse session if anonymous try to connect
1430                  * on reauthetication.
1431                  */
1432                 if (ksmbd_anonymous_user(user)) {
1433                         ksmbd_free_user(user);
1434                         return 0;
1435                 }
1436                 ksmbd_free_user(sess->user);
1437         }
1438
1439         sess->user = user;
1440         if (user_guest(sess->user)) {
1441                 if (conn->sign) {
1442                         ksmbd_debug(SMB, "Guest login not allowed when signing enabled\n");
1443                         return -EPERM;
1444                 }
1445
1446                 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1447         } else {
1448                 struct authenticate_message *authblob;
1449
1450                 authblob = user_authblob(conn, req);
1451                 sz = le16_to_cpu(req->SecurityBufferLength);
1452                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, sess);
1453                 if (rc) {
1454                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1455                         ksmbd_debug(SMB, "authentication failed\n");
1456                         return -EPERM;
1457                 }
1458
1459                 /*
1460                  * If session state is SMB2_SESSION_VALID, We can assume
1461                  * that it is reauthentication. And the user/password
1462                  * has been verified, so return it here.
1463                  */
1464                 if (sess->state == SMB2_SESSION_VALID) {
1465                         if (conn->binding)
1466                                 goto binding_session;
1467                         return 0;
1468                 }
1469
1470                 if ((conn->sign || server_conf.enforced_signing) ||
1471                     (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1472                         sess->sign = true;
1473
1474                 if (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION &&
1475                     conn->ops->generate_encryptionkey &&
1476                     !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1477                         rc = conn->ops->generate_encryptionkey(sess);
1478                         if (rc) {
1479                                 ksmbd_debug(SMB,
1480                                             "SMB3 encryption key generation failed\n");
1481                                 return -EINVAL;
1482                         }
1483                         sess->enc = true;
1484                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1485                         /*
1486                          * signing is disable if encryption is enable
1487                          * on this session
1488                          */
1489                         sess->sign = false;
1490                 }
1491         }
1492
1493 binding_session:
1494         if (conn->dialect >= SMB30_PROT_ID) {
1495                 chann = lookup_chann_list(sess, conn);
1496                 if (!chann) {
1497                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1498                         if (!chann)
1499                                 return -ENOMEM;
1500
1501                         chann->conn = conn;
1502                         INIT_LIST_HEAD(&chann->chann_list);
1503                         list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1504                 }
1505         }
1506
1507         if (conn->ops->generate_signingkey) {
1508                 rc = conn->ops->generate_signingkey(sess, conn);
1509                 if (rc) {
1510                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1511                         return -EINVAL;
1512                 }
1513         }
1514
1515         if (!ksmbd_conn_lookup_dialect(conn)) {
1516                 pr_err("fail to verify the dialect\n");
1517                 return -ENOENT;
1518         }
1519         return 0;
1520 }
1521
1522 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1523 static int krb5_authenticate(struct ksmbd_work *work)
1524 {
1525         struct smb2_sess_setup_req *req = work->request_buf;
1526         struct smb2_sess_setup_rsp *rsp = work->response_buf;
1527         struct ksmbd_conn *conn = work->conn;
1528         struct ksmbd_session *sess = work->sess;
1529         char *in_blob, *out_blob;
1530         struct channel *chann = NULL;
1531         u64 prev_sess_id;
1532         int in_len, out_len;
1533         int retval;
1534
1535         in_blob = (char *)&req->hdr.ProtocolId +
1536                 le16_to_cpu(req->SecurityBufferOffset);
1537         in_len = le16_to_cpu(req->SecurityBufferLength);
1538         out_blob = (char *)&rsp->hdr.ProtocolId +
1539                 le16_to_cpu(rsp->SecurityBufferOffset);
1540         out_len = work->response_sz -
1541                 offsetof(struct smb2_hdr, smb2_buf_length) -
1542                 le16_to_cpu(rsp->SecurityBufferOffset);
1543
1544         /* Check previous session */
1545         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1546         if (prev_sess_id && prev_sess_id != sess->id)
1547                 destroy_previous_session(sess->user, prev_sess_id);
1548
1549         if (sess->state == SMB2_SESSION_VALID)
1550                 ksmbd_free_user(sess->user);
1551
1552         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1553                                          out_blob, &out_len);
1554         if (retval) {
1555                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1556                 return -EINVAL;
1557         }
1558         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1559         inc_rfc1001_len(rsp, out_len - 1);
1560
1561         if ((conn->sign || server_conf.enforced_signing) ||
1562             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1563                 sess->sign = true;
1564
1565         if ((conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) &&
1566             conn->ops->generate_encryptionkey) {
1567                 retval = conn->ops->generate_encryptionkey(sess);
1568                 if (retval) {
1569                         ksmbd_debug(SMB,
1570                                     "SMB3 encryption key generation failed\n");
1571                         return -EINVAL;
1572                 }
1573                 sess->enc = true;
1574                 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1575                 sess->sign = false;
1576         }
1577
1578         if (conn->dialect >= SMB30_PROT_ID) {
1579                 chann = lookup_chann_list(sess, conn);
1580                 if (!chann) {
1581                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1582                         if (!chann)
1583                                 return -ENOMEM;
1584
1585                         chann->conn = conn;
1586                         INIT_LIST_HEAD(&chann->chann_list);
1587                         list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1588                 }
1589         }
1590
1591         if (conn->ops->generate_signingkey) {
1592                 retval = conn->ops->generate_signingkey(sess, conn);
1593                 if (retval) {
1594                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1595                         return -EINVAL;
1596                 }
1597         }
1598
1599         if (!ksmbd_conn_lookup_dialect(conn)) {
1600                 pr_err("fail to verify the dialect\n");
1601                 return -ENOENT;
1602         }
1603         return 0;
1604 }
1605 #else
1606 static int krb5_authenticate(struct ksmbd_work *work)
1607 {
1608         return -EOPNOTSUPP;
1609 }
1610 #endif
1611
1612 int smb2_sess_setup(struct ksmbd_work *work)
1613 {
1614         struct ksmbd_conn *conn = work->conn;
1615         struct smb2_sess_setup_req *req = work->request_buf;
1616         struct smb2_sess_setup_rsp *rsp = work->response_buf;
1617         struct ksmbd_session *sess;
1618         struct negotiate_message *negblob;
1619         unsigned int negblob_len, negblob_off;
1620         int rc = 0;
1621
1622         ksmbd_debug(SMB, "Received request for session setup\n");
1623
1624         rsp->StructureSize = cpu_to_le16(9);
1625         rsp->SessionFlags = 0;
1626         rsp->SecurityBufferOffset = cpu_to_le16(72);
1627         rsp->SecurityBufferLength = 0;
1628         inc_rfc1001_len(rsp, 9);
1629
1630         if (!req->hdr.SessionId) {
1631                 sess = ksmbd_smb2_session_create();
1632                 if (!sess) {
1633                         rc = -ENOMEM;
1634                         goto out_err;
1635                 }
1636                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1637                 ksmbd_session_register(conn, sess);
1638         } else if (conn->dialect >= SMB30_PROT_ID &&
1639                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1640                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1641                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1642
1643                 sess = ksmbd_session_lookup_slowpath(sess_id);
1644                 if (!sess) {
1645                         rc = -ENOENT;
1646                         goto out_err;
1647                 }
1648
1649                 if (conn->dialect != sess->conn->dialect) {
1650                         rc = -EINVAL;
1651                         goto out_err;
1652                 }
1653
1654                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1655                         rc = -EINVAL;
1656                         goto out_err;
1657                 }
1658
1659                 if (strncmp(conn->ClientGUID, sess->conn->ClientGUID,
1660                             SMB2_CLIENT_GUID_SIZE)) {
1661                         rc = -ENOENT;
1662                         goto out_err;
1663                 }
1664
1665                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1666                         rc = -EACCES;
1667                         goto out_err;
1668                 }
1669
1670                 if (sess->state == SMB2_SESSION_EXPIRED) {
1671                         rc = -EFAULT;
1672                         goto out_err;
1673                 }
1674
1675                 if (ksmbd_session_lookup(conn, sess_id)) {
1676                         rc = -EACCES;
1677                         goto out_err;
1678                 }
1679
1680                 conn->binding = true;
1681         } else if ((conn->dialect < SMB30_PROT_ID ||
1682                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1683                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1684                 sess = NULL;
1685                 rc = -EACCES;
1686                 goto out_err;
1687         } else {
1688                 sess = ksmbd_session_lookup(conn,
1689                                             le64_to_cpu(req->hdr.SessionId));
1690                 if (!sess) {
1691                         rc = -ENOENT;
1692                         goto out_err;
1693                 }
1694         }
1695         work->sess = sess;
1696
1697         if (sess->state == SMB2_SESSION_EXPIRED)
1698                 sess->state = SMB2_SESSION_IN_PROGRESS;
1699
1700         negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1701         negblob_len = le16_to_cpu(req->SecurityBufferLength);
1702         if (negblob_off < (offsetof(struct smb2_sess_setup_req, Buffer) - 4) ||
1703             negblob_len < offsetof(struct negotiate_message, NegotiateFlags))
1704                 return -EINVAL;
1705
1706         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1707                         negblob_off);
1708
1709         if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1710                 if (conn->mechToken)
1711                         negblob = (struct negotiate_message *)conn->mechToken;
1712         }
1713
1714         if (server_conf.auth_mechs & conn->auth_mechs) {
1715                 rc = generate_preauth_hash(work);
1716                 if (rc)
1717                         goto out_err;
1718
1719                 if (conn->preferred_auth_mech &
1720                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1721                         rc = krb5_authenticate(work);
1722                         if (rc) {
1723                                 rc = -EINVAL;
1724                                 goto out_err;
1725                         }
1726
1727                         ksmbd_conn_set_good(work);
1728                         sess->state = SMB2_SESSION_VALID;
1729                         kfree(sess->Preauth_HashValue);
1730                         sess->Preauth_HashValue = NULL;
1731                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1732                         if (negblob->MessageType == NtLmNegotiate) {
1733                                 rc = ntlm_negotiate(work, negblob, negblob_len);
1734                                 if (rc)
1735                                         goto out_err;
1736                                 rsp->hdr.Status =
1737                                         STATUS_MORE_PROCESSING_REQUIRED;
1738                                 /*
1739                                  * Note: here total size -1 is done as an
1740                                  * adjustment for 0 size blob
1741                                  */
1742                                 inc_rfc1001_len(rsp, le16_to_cpu(rsp->SecurityBufferLength) - 1);
1743
1744                         } else if (negblob->MessageType == NtLmAuthenticate) {
1745                                 rc = ntlm_authenticate(work);
1746                                 if (rc)
1747                                         goto out_err;
1748
1749                                 ksmbd_conn_set_good(work);
1750                                 sess->state = SMB2_SESSION_VALID;
1751                                 if (conn->binding) {
1752                                         struct preauth_session *preauth_sess;
1753
1754                                         preauth_sess =
1755                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1756                                         if (preauth_sess) {
1757                                                 list_del(&preauth_sess->preauth_entry);
1758                                                 kfree(preauth_sess);
1759                                         }
1760                                 }
1761                                 kfree(sess->Preauth_HashValue);
1762                                 sess->Preauth_HashValue = NULL;
1763                         }
1764                 } else {
1765                         /* TODO: need one more negotiation */
1766                         pr_err("Not support the preferred authentication\n");
1767                         rc = -EINVAL;
1768                 }
1769         } else {
1770                 pr_err("Not support authentication\n");
1771                 rc = -EINVAL;
1772         }
1773
1774 out_err:
1775         if (rc == -EINVAL)
1776                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1777         else if (rc == -ENOENT)
1778                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1779         else if (rc == -EACCES)
1780                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1781         else if (rc == -EFAULT)
1782                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1783         else if (rc == -ENOMEM)
1784                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1785         else if (rc)
1786                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1787
1788         if (conn->use_spnego && conn->mechToken) {
1789                 kfree(conn->mechToken);
1790                 conn->mechToken = NULL;
1791         }
1792
1793         if (rc < 0) {
1794                 /*
1795                  * SecurityBufferOffset should be set to zero
1796                  * in session setup error response.
1797                  */
1798                 rsp->SecurityBufferOffset = 0;
1799
1800                 if (sess) {
1801                         bool try_delay = false;
1802
1803                         /*
1804                          * To avoid dictionary attacks (repeated session setups rapidly sent) to
1805                          * connect to server, ksmbd make a delay of a 5 seconds on session setup
1806                          * failure to make it harder to send enough random connection requests
1807                          * to break into a server.
1808                          */
1809                         if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1810                                 try_delay = true;
1811
1812                         ksmbd_session_destroy(sess);
1813                         work->sess = NULL;
1814                         if (try_delay)
1815                                 ssleep(5);
1816                 }
1817         }
1818
1819         return rc;
1820 }
1821
1822 /**
1823  * smb2_tree_connect() - handler for smb2 tree connect command
1824  * @work:       smb work containing smb request buffer
1825  *
1826  * Return:      0 on success, otherwise error
1827  */
1828 int smb2_tree_connect(struct ksmbd_work *work)
1829 {
1830         struct ksmbd_conn *conn = work->conn;
1831         struct smb2_tree_connect_req *req = work->request_buf;
1832         struct smb2_tree_connect_rsp *rsp = work->response_buf;
1833         struct ksmbd_session *sess = work->sess;
1834         char *treename = NULL, *name = NULL;
1835         struct ksmbd_tree_conn_status status;
1836         struct ksmbd_share_config *share;
1837         int rc = -EINVAL;
1838
1839         treename = smb_strndup_from_utf16(req->Buffer,
1840                                           le16_to_cpu(req->PathLength), true,
1841                                           conn->local_nls);
1842         if (IS_ERR(treename)) {
1843                 pr_err("treename is NULL\n");
1844                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1845                 goto out_err1;
1846         }
1847
1848         name = ksmbd_extract_sharename(treename);
1849         if (IS_ERR(name)) {
1850                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1851                 goto out_err1;
1852         }
1853
1854         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1855                     name, treename);
1856
1857         status = ksmbd_tree_conn_connect(sess, name);
1858         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1859                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1860         else
1861                 goto out_err1;
1862
1863         share = status.tree_conn->share_conf;
1864         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1865                 ksmbd_debug(SMB, "IPC share path request\n");
1866                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1867                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1868                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1869                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1870                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1871                         FILE_SYNCHRONIZE_LE;
1872         } else {
1873                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1874                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1875                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1876                 if (test_tree_conn_flag(status.tree_conn,
1877                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1878                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1879                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1880                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1881                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1882                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1883                                 FILE_SYNCHRONIZE_LE;
1884                 }
1885         }
1886
1887         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1888         if (conn->posix_ext_supported)
1889                 status.tree_conn->posix_extensions = true;
1890
1891 out_err1:
1892         rsp->StructureSize = cpu_to_le16(16);
1893         rsp->Capabilities = 0;
1894         rsp->Reserved = 0;
1895         /* default manual caching */
1896         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
1897         inc_rfc1001_len(rsp, 16);
1898
1899         if (!IS_ERR(treename))
1900                 kfree(treename);
1901         if (!IS_ERR(name))
1902                 kfree(name);
1903
1904         switch (status.ret) {
1905         case KSMBD_TREE_CONN_STATUS_OK:
1906                 rsp->hdr.Status = STATUS_SUCCESS;
1907                 rc = 0;
1908                 break;
1909         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
1910                 rsp->hdr.Status = STATUS_BAD_NETWORK_PATH;
1911                 break;
1912         case -ENOMEM:
1913         case KSMBD_TREE_CONN_STATUS_NOMEM:
1914                 rsp->hdr.Status = STATUS_NO_MEMORY;
1915                 break;
1916         case KSMBD_TREE_CONN_STATUS_ERROR:
1917         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
1918         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
1919                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1920                 break;
1921         case -EINVAL:
1922                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1923                 break;
1924         default:
1925                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1926         }
1927
1928         return rc;
1929 }
1930
1931 /**
1932  * smb2_create_open_flags() - convert smb open flags to unix open flags
1933  * @file_present:       is file already present
1934  * @access:             file access flags
1935  * @disposition:        file disposition flags
1936  * @may_flags:          set with MAY_ flags
1937  *
1938  * Return:      file open flags
1939  */
1940 static int smb2_create_open_flags(bool file_present, __le32 access,
1941                                   __le32 disposition,
1942                                   int *may_flags)
1943 {
1944         int oflags = O_NONBLOCK | O_LARGEFILE;
1945
1946         if (access & FILE_READ_DESIRED_ACCESS_LE &&
1947             access & FILE_WRITE_DESIRE_ACCESS_LE) {
1948                 oflags |= O_RDWR;
1949                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
1950         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
1951                 oflags |= O_WRONLY;
1952                 *may_flags = MAY_OPEN | MAY_WRITE;
1953         } else {
1954                 oflags |= O_RDONLY;
1955                 *may_flags = MAY_OPEN | MAY_READ;
1956         }
1957
1958         if (access == FILE_READ_ATTRIBUTES_LE)
1959                 oflags |= O_PATH;
1960
1961         if (file_present) {
1962                 switch (disposition & FILE_CREATE_MASK_LE) {
1963                 case FILE_OPEN_LE:
1964                 case FILE_CREATE_LE:
1965                         break;
1966                 case FILE_SUPERSEDE_LE:
1967                 case FILE_OVERWRITE_LE:
1968                 case FILE_OVERWRITE_IF_LE:
1969                         oflags |= O_TRUNC;
1970                         break;
1971                 default:
1972                         break;
1973                 }
1974         } else {
1975                 switch (disposition & FILE_CREATE_MASK_LE) {
1976                 case FILE_SUPERSEDE_LE:
1977                 case FILE_CREATE_LE:
1978                 case FILE_OPEN_IF_LE:
1979                 case FILE_OVERWRITE_IF_LE:
1980                         oflags |= O_CREAT;
1981                         break;
1982                 case FILE_OPEN_LE:
1983                 case FILE_OVERWRITE_LE:
1984                         oflags &= ~O_CREAT;
1985                         break;
1986                 default:
1987                         break;
1988                 }
1989         }
1990
1991         return oflags;
1992 }
1993
1994 /**
1995  * smb2_tree_disconnect() - handler for smb tree connect request
1996  * @work:       smb work containing request buffer
1997  *
1998  * Return:      0
1999  */
2000 int smb2_tree_disconnect(struct ksmbd_work *work)
2001 {
2002         struct smb2_tree_disconnect_rsp *rsp = work->response_buf;
2003         struct ksmbd_session *sess = work->sess;
2004         struct ksmbd_tree_connect *tcon = work->tcon;
2005
2006         rsp->StructureSize = cpu_to_le16(4);
2007         inc_rfc1001_len(rsp, 4);
2008
2009         ksmbd_debug(SMB, "request\n");
2010
2011         if (!tcon) {
2012                 struct smb2_tree_disconnect_req *req = work->request_buf;
2013
2014                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2015                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2016                 smb2_set_err_rsp(work);
2017                 return 0;
2018         }
2019
2020         ksmbd_close_tree_conn_fds(work);
2021         ksmbd_tree_conn_disconnect(sess, tcon);
2022         return 0;
2023 }
2024
2025 /**
2026  * smb2_session_logoff() - handler for session log off request
2027  * @work:       smb work containing request buffer
2028  *
2029  * Return:      0
2030  */
2031 int smb2_session_logoff(struct ksmbd_work *work)
2032 {
2033         struct ksmbd_conn *conn = work->conn;
2034         struct smb2_logoff_rsp *rsp = work->response_buf;
2035         struct ksmbd_session *sess = work->sess;
2036
2037         rsp->StructureSize = cpu_to_le16(4);
2038         inc_rfc1001_len(rsp, 4);
2039
2040         ksmbd_debug(SMB, "request\n");
2041
2042         /* Got a valid session, set connection state */
2043         WARN_ON(sess->conn != conn);
2044
2045         /* setting CifsExiting here may race with start_tcp_sess */
2046         ksmbd_conn_set_need_reconnect(work);
2047         ksmbd_close_session_fds(work);
2048         ksmbd_conn_wait_idle(conn);
2049
2050         if (ksmbd_tree_conn_session_logoff(sess)) {
2051                 struct smb2_logoff_req *req = work->request_buf;
2052
2053                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2054                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2055                 smb2_set_err_rsp(work);
2056                 return 0;
2057         }
2058
2059         ksmbd_destroy_file_table(&sess->file_table);
2060         sess->state = SMB2_SESSION_EXPIRED;
2061
2062         ksmbd_free_user(sess->user);
2063         sess->user = NULL;
2064
2065         /* let start_tcp_sess free connection info now */
2066         ksmbd_conn_set_need_negotiate(work);
2067         return 0;
2068 }
2069
2070 /**
2071  * create_smb2_pipe() - create IPC pipe
2072  * @work:       smb work containing request buffer
2073  *
2074  * Return:      0 on success, otherwise error
2075  */
2076 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2077 {
2078         struct smb2_create_rsp *rsp = work->response_buf;
2079         struct smb2_create_req *req = work->request_buf;
2080         int id;
2081         int err;
2082         char *name;
2083
2084         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2085                                       1, work->conn->local_nls);
2086         if (IS_ERR(name)) {
2087                 rsp->hdr.Status = STATUS_NO_MEMORY;
2088                 err = PTR_ERR(name);
2089                 goto out;
2090         }
2091
2092         id = ksmbd_session_rpc_open(work->sess, name);
2093         if (id < 0) {
2094                 pr_err("Unable to open RPC pipe: %d\n", id);
2095                 err = id;
2096                 goto out;
2097         }
2098
2099         rsp->hdr.Status = STATUS_SUCCESS;
2100         rsp->StructureSize = cpu_to_le16(89);
2101         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2102         rsp->Reserved = 0;
2103         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2104
2105         rsp->CreationTime = cpu_to_le64(0);
2106         rsp->LastAccessTime = cpu_to_le64(0);
2107         rsp->ChangeTime = cpu_to_le64(0);
2108         rsp->AllocationSize = cpu_to_le64(0);
2109         rsp->EndofFile = cpu_to_le64(0);
2110         rsp->FileAttributes = ATTR_NORMAL_LE;
2111         rsp->Reserved2 = 0;
2112         rsp->VolatileFileId = cpu_to_le64(id);
2113         rsp->PersistentFileId = 0;
2114         rsp->CreateContextsOffset = 0;
2115         rsp->CreateContextsLength = 0;
2116
2117         inc_rfc1001_len(rsp, 88); /* StructureSize - 1*/
2118         kfree(name);
2119         return 0;
2120
2121 out:
2122         switch (err) {
2123         case -EINVAL:
2124                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2125                 break;
2126         case -ENOSPC:
2127         case -ENOMEM:
2128                 rsp->hdr.Status = STATUS_NO_MEMORY;
2129                 break;
2130         }
2131
2132         if (!IS_ERR(name))
2133                 kfree(name);
2134
2135         smb2_set_err_rsp(work);
2136         return err;
2137 }
2138
2139 /**
2140  * smb2_set_ea() - handler for setting extended attributes using set
2141  *              info command
2142  * @eabuf:      set info command buffer
2143  * @buf_len:    set info command buffer length
2144  * @path:       dentry path for get ea
2145  *
2146  * Return:      0 on success, otherwise error
2147  */
2148 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2149                        struct path *path)
2150 {
2151         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2152         char *attr_name = NULL, *value;
2153         int rc = 0;
2154         unsigned int next = 0;
2155
2156         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2157                         le16_to_cpu(eabuf->EaValueLength))
2158                 return -EINVAL;
2159
2160         attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2161         if (!attr_name)
2162                 return -ENOMEM;
2163
2164         do {
2165                 if (!eabuf->EaNameLength)
2166                         goto next;
2167
2168                 ksmbd_debug(SMB,
2169                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2170                             eabuf->name, eabuf->EaNameLength,
2171                             le16_to_cpu(eabuf->EaValueLength),
2172                             le32_to_cpu(eabuf->NextEntryOffset));
2173
2174                 if (eabuf->EaNameLength >
2175                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2176                         rc = -EINVAL;
2177                         break;
2178                 }
2179
2180                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2181                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2182                        eabuf->EaNameLength);
2183                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2184                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2185
2186                 if (!eabuf->EaValueLength) {
2187                         rc = ksmbd_vfs_casexattr_len(user_ns,
2188                                                      path->dentry,
2189                                                      attr_name,
2190                                                      XATTR_USER_PREFIX_LEN +
2191                                                      eabuf->EaNameLength);
2192
2193                         /* delete the EA only when it exits */
2194                         if (rc > 0) {
2195                                 rc = ksmbd_vfs_remove_xattr(user_ns,
2196                                                             path->dentry,
2197                                                             attr_name);
2198
2199                                 if (rc < 0) {
2200                                         ksmbd_debug(SMB,
2201                                                     "remove xattr failed(%d)\n",
2202                                                     rc);
2203                                         break;
2204                                 }
2205                         }
2206
2207                         /* if the EA doesn't exist, just do nothing. */
2208                         rc = 0;
2209                 } else {
2210                         rc = ksmbd_vfs_setxattr(user_ns,
2211                                                 path->dentry, attr_name, value,
2212                                                 le16_to_cpu(eabuf->EaValueLength), 0);
2213                         if (rc < 0) {
2214                                 ksmbd_debug(SMB,
2215                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2216                                             rc);
2217                                 break;
2218                         }
2219                 }
2220
2221 next:
2222                 next = le32_to_cpu(eabuf->NextEntryOffset);
2223                 if (next == 0 || buf_len < next)
2224                         break;
2225                 buf_len -= next;
2226                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2227                 if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength))
2228                         break;
2229
2230         } while (next != 0);
2231
2232         kfree(attr_name);
2233         return rc;
2234 }
2235
2236 static noinline int smb2_set_stream_name_xattr(struct path *path,
2237                                                struct ksmbd_file *fp,
2238                                                char *stream_name, int s_type)
2239 {
2240         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2241         size_t xattr_stream_size;
2242         char *xattr_stream_name;
2243         int rc;
2244
2245         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2246                                          &xattr_stream_name,
2247                                          &xattr_stream_size,
2248                                          s_type);
2249         if (rc)
2250                 return rc;
2251
2252         fp->stream.name = xattr_stream_name;
2253         fp->stream.size = xattr_stream_size;
2254
2255         /* Check if there is stream prefix in xattr space */
2256         rc = ksmbd_vfs_casexattr_len(user_ns,
2257                                      path->dentry,
2258                                      xattr_stream_name,
2259                                      xattr_stream_size);
2260         if (rc >= 0)
2261                 return 0;
2262
2263         if (fp->cdoption == FILE_OPEN_LE) {
2264                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2265                 return -EBADF;
2266         }
2267
2268         rc = ksmbd_vfs_setxattr(user_ns, path->dentry,
2269                                 xattr_stream_name, NULL, 0, 0);
2270         if (rc < 0)
2271                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2272         return 0;
2273 }
2274
2275 static int smb2_remove_smb_xattrs(struct path *path)
2276 {
2277         struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2278         char *name, *xattr_list = NULL;
2279         ssize_t xattr_list_len;
2280         int err = 0;
2281
2282         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2283         if (xattr_list_len < 0) {
2284                 goto out;
2285         } else if (!xattr_list_len) {
2286                 ksmbd_debug(SMB, "empty xattr in the file\n");
2287                 goto out;
2288         }
2289
2290         for (name = xattr_list; name - xattr_list < xattr_list_len;
2291                         name += strlen(name) + 1) {
2292                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2293
2294                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2295                     strncmp(&name[XATTR_USER_PREFIX_LEN], DOS_ATTRIBUTE_PREFIX,
2296                             DOS_ATTRIBUTE_PREFIX_LEN) &&
2297                     strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, STREAM_PREFIX_LEN))
2298                         continue;
2299
2300                 err = ksmbd_vfs_remove_xattr(user_ns, path->dentry, name);
2301                 if (err)
2302                         ksmbd_debug(SMB, "remove xattr failed : %s\n", name);
2303         }
2304 out:
2305         kvfree(xattr_list);
2306         return err;
2307 }
2308
2309 static int smb2_create_truncate(struct path *path)
2310 {
2311         int rc = vfs_truncate(path, 0);
2312
2313         if (rc) {
2314                 pr_err("vfs_truncate failed, rc %d\n", rc);
2315                 return rc;
2316         }
2317
2318         rc = smb2_remove_smb_xattrs(path);
2319         if (rc == -EOPNOTSUPP)
2320                 rc = 0;
2321         if (rc)
2322                 ksmbd_debug(SMB,
2323                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2324                             rc);
2325         return rc;
2326 }
2327
2328 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, struct path *path,
2329                             struct ksmbd_file *fp)
2330 {
2331         struct xattr_dos_attrib da = {0};
2332         int rc;
2333
2334         if (!test_share_config_flag(tcon->share_conf,
2335                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2336                 return;
2337
2338         da.version = 4;
2339         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2340         da.itime = da.create_time = fp->create_time;
2341         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2342                 XATTR_DOSINFO_ITIME;
2343
2344         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_user_ns(path->mnt),
2345                                             path->dentry, &da);
2346         if (rc)
2347                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2348 }
2349
2350 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2351                                struct path *path, struct ksmbd_file *fp)
2352 {
2353         struct xattr_dos_attrib da;
2354         int rc;
2355
2356         fp->f_ci->m_fattr &= ~(ATTR_HIDDEN_LE | ATTR_SYSTEM_LE);
2357
2358         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2359         if (!test_share_config_flag(tcon->share_conf,
2360                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2361                 return;
2362
2363         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_user_ns(path->mnt),
2364                                             path->dentry, &da);
2365         if (rc > 0) {
2366                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2367                 fp->create_time = da.create_time;
2368                 fp->itime = da.itime;
2369         }
2370 }
2371
2372 static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name,
2373                       int open_flags, umode_t posix_mode, bool is_dir)
2374 {
2375         struct ksmbd_tree_connect *tcon = work->tcon;
2376         struct ksmbd_share_config *share = tcon->share_conf;
2377         umode_t mode;
2378         int rc;
2379
2380         if (!(open_flags & O_CREAT))
2381                 return -EBADF;
2382
2383         ksmbd_debug(SMB, "file does not exist, so creating\n");
2384         if (is_dir == true) {
2385                 ksmbd_debug(SMB, "creating directory\n");
2386
2387                 mode = share_config_directory_mode(share, posix_mode);
2388                 rc = ksmbd_vfs_mkdir(work, name, mode);
2389                 if (rc)
2390                         return rc;
2391         } else {
2392                 ksmbd_debug(SMB, "creating regular file\n");
2393
2394                 mode = share_config_create_mode(share, posix_mode);
2395                 rc = ksmbd_vfs_create(work, name, mode);
2396                 if (rc)
2397                         return rc;
2398         }
2399
2400         rc = ksmbd_vfs_kern_path(work, name, 0, path, 0);
2401         if (rc) {
2402                 pr_err("cannot get linux path (%s), err = %d\n",
2403                        name, rc);
2404                 return rc;
2405         }
2406         return 0;
2407 }
2408
2409 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2410                                  struct smb2_create_req *req,
2411                                  struct path *path)
2412 {
2413         struct create_context *context;
2414         struct create_sd_buf_req *sd_buf;
2415
2416         if (!req->CreateContextsOffset)
2417                 return -ENOENT;
2418
2419         /* Parse SD BUFFER create contexts */
2420         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER);
2421         if (!context)
2422                 return -ENOENT;
2423         else if (IS_ERR(context))
2424                 return PTR_ERR(context);
2425
2426         ksmbd_debug(SMB,
2427                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2428         sd_buf = (struct create_sd_buf_req *)context;
2429         if (le16_to_cpu(context->DataOffset) +
2430             le32_to_cpu(context->DataLength) <
2431             sizeof(struct create_sd_buf_req))
2432                 return -EINVAL;
2433         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2434                             le32_to_cpu(sd_buf->ccontext.DataLength), true);
2435 }
2436
2437 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2438                              struct user_namespace *mnt_userns,
2439                              struct inode *inode)
2440 {
2441         fattr->cf_uid = i_uid_into_mnt(mnt_userns, inode);
2442         fattr->cf_gid = i_gid_into_mnt(mnt_userns, inode);
2443         fattr->cf_mode = inode->i_mode;
2444         fattr->cf_acls = NULL;
2445         fattr->cf_dacls = NULL;
2446
2447         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2448                 fattr->cf_acls = get_acl(inode, ACL_TYPE_ACCESS);
2449                 if (S_ISDIR(inode->i_mode))
2450                         fattr->cf_dacls = get_acl(inode, ACL_TYPE_DEFAULT);
2451         }
2452 }
2453
2454 /**
2455  * smb2_open() - handler for smb file open request
2456  * @work:       smb work containing request buffer
2457  *
2458  * Return:      0 on success, otherwise error
2459  */
2460 int smb2_open(struct ksmbd_work *work)
2461 {
2462         struct ksmbd_conn *conn = work->conn;
2463         struct ksmbd_session *sess = work->sess;
2464         struct ksmbd_tree_connect *tcon = work->tcon;
2465         struct smb2_create_req *req;
2466         struct smb2_create_rsp *rsp, *rsp_org;
2467         struct path path;
2468         struct ksmbd_share_config *share = tcon->share_conf;
2469         struct ksmbd_file *fp = NULL;
2470         struct file *filp = NULL;
2471         struct user_namespace *user_ns = NULL;
2472         struct kstat stat;
2473         struct create_context *context;
2474         struct lease_ctx_info *lc = NULL;
2475         struct create_ea_buf_req *ea_buf = NULL;
2476         struct oplock_info *opinfo;
2477         __le32 *next_ptr = NULL;
2478         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2479         int rc = 0;
2480         int contxt_cnt = 0, query_disk_id = 0;
2481         int maximal_access_ctxt = 0, posix_ctxt = 0;
2482         int s_type = 0;
2483         int next_off = 0;
2484         char *name = NULL;
2485         char *stream_name = NULL;
2486         bool file_present = false, created = false, already_permitted = false;
2487         int share_ret, need_truncate = 0;
2488         u64 time;
2489         umode_t posix_mode = 0;
2490         __le32 daccess, maximal_access = 0;
2491
2492         rsp_org = work->response_buf;
2493         WORK_BUFFERS(work, req, rsp);
2494
2495         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2496             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2497                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2498                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2499                 smb2_set_err_rsp(work);
2500                 return -EINVAL;
2501         }
2502
2503         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2504                 ksmbd_debug(SMB, "IPC pipe create request\n");
2505                 return create_smb2_pipe(work);
2506         }
2507
2508         if (req->NameLength) {
2509                 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2510                     *(char *)req->Buffer == '\\') {
2511                         pr_err("not allow directory name included leading slash\n");
2512                         rc = -EINVAL;
2513                         goto err_out1;
2514                 }
2515
2516                 name = smb2_get_name(share,
2517                                      req->Buffer,
2518                                      le16_to_cpu(req->NameLength),
2519                                      work->conn->local_nls);
2520                 if (IS_ERR(name)) {
2521                         rc = PTR_ERR(name);
2522                         if (rc != -ENOMEM)
2523                                 rc = -ENOENT;
2524                         name = NULL;
2525                         goto err_out1;
2526                 }
2527
2528                 ksmbd_debug(SMB, "converted name = %s\n", name);
2529                 if (strchr(name, ':')) {
2530                         if (!test_share_config_flag(work->tcon->share_conf,
2531                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2532                                 rc = -EBADF;
2533                                 goto err_out1;
2534                         }
2535                         rc = parse_stream_name(name, &stream_name, &s_type);
2536                         if (rc < 0)
2537                                 goto err_out1;
2538                 }
2539
2540                 rc = ksmbd_validate_filename(name);
2541                 if (rc < 0)
2542                         goto err_out1;
2543
2544                 if (ksmbd_share_veto_filename(share, name)) {
2545                         rc = -ENOENT;
2546                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2547                                     name);
2548                         goto err_out1;
2549                 }
2550         } else {
2551                 name = kstrdup("", GFP_KERNEL);
2552                 if (!name) {
2553                         rc = -ENOMEM;
2554                         goto err_out1;
2555                 }
2556         }
2557
2558         req_op_level = req->RequestedOplockLevel;
2559         if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2560                 lc = parse_lease_state(req);
2561
2562         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE_LE)) {
2563                 pr_err("Invalid impersonationlevel : 0x%x\n",
2564                        le32_to_cpu(req->ImpersonationLevel));
2565                 rc = -EIO;
2566                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2567                 goto err_out1;
2568         }
2569
2570         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK)) {
2571                 pr_err("Invalid create options : 0x%x\n",
2572                        le32_to_cpu(req->CreateOptions));
2573                 rc = -EINVAL;
2574                 goto err_out1;
2575         } else {
2576                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2577                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2578                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2579
2580                 if (req->CreateOptions &
2581                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2582                      FILE_RESERVE_OPFILTER_LE)) {
2583                         rc = -EOPNOTSUPP;
2584                         goto err_out1;
2585                 }
2586
2587                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2588                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2589                                 rc = -EINVAL;
2590                                 goto err_out1;
2591                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2592                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2593                         }
2594                 }
2595         }
2596
2597         if (le32_to_cpu(req->CreateDisposition) >
2598             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2599                 pr_err("Invalid create disposition : 0x%x\n",
2600                        le32_to_cpu(req->CreateDisposition));
2601                 rc = -EINVAL;
2602                 goto err_out1;
2603         }
2604
2605         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2606                 pr_err("Invalid desired access : 0x%x\n",
2607                        le32_to_cpu(req->DesiredAccess));
2608                 rc = -EACCES;
2609                 goto err_out1;
2610         }
2611
2612         if (req->FileAttributes && !(req->FileAttributes & ATTR_MASK_LE)) {
2613                 pr_err("Invalid file attribute : 0x%x\n",
2614                        le32_to_cpu(req->FileAttributes));
2615                 rc = -EINVAL;
2616                 goto err_out1;
2617         }
2618
2619         if (req->CreateContextsOffset) {
2620                 /* Parse non-durable handle create contexts */
2621                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER);
2622                 if (IS_ERR(context)) {
2623                         rc = PTR_ERR(context);
2624                         goto err_out1;
2625                 } else if (context) {
2626                         ea_buf = (struct create_ea_buf_req *)context;
2627                         if (le16_to_cpu(context->DataOffset) +
2628                             le32_to_cpu(context->DataLength) <
2629                             sizeof(struct create_ea_buf_req)) {
2630                                 rc = -EINVAL;
2631                                 goto err_out1;
2632                         }
2633                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2634                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2635                                 rc = -EACCES;
2636                                 goto err_out1;
2637                         }
2638                 }
2639
2640                 context = smb2_find_context_vals(req,
2641                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST);
2642                 if (IS_ERR(context)) {
2643                         rc = PTR_ERR(context);
2644                         goto err_out1;
2645                 } else if (context) {
2646                         ksmbd_debug(SMB,
2647                                     "get query maximal access context\n");
2648                         maximal_access_ctxt = 1;
2649                 }
2650
2651                 context = smb2_find_context_vals(req,
2652                                                  SMB2_CREATE_TIMEWARP_REQUEST);
2653                 if (IS_ERR(context)) {
2654                         rc = PTR_ERR(context);
2655                         goto err_out1;
2656                 } else if (context) {
2657                         ksmbd_debug(SMB, "get timewarp context\n");
2658                         rc = -EBADF;
2659                         goto err_out1;
2660                 }
2661
2662                 if (tcon->posix_extensions) {
2663                         context = smb2_find_context_vals(req,
2664                                                          SMB2_CREATE_TAG_POSIX);
2665                         if (IS_ERR(context)) {
2666                                 rc = PTR_ERR(context);
2667                                 goto err_out1;
2668                         } else if (context) {
2669                                 struct create_posix *posix =
2670                                         (struct create_posix *)context;
2671                                 if (le16_to_cpu(context->DataOffset) +
2672                                     le32_to_cpu(context->DataLength) <
2673                                     sizeof(struct create_posix)) {
2674                                         rc = -EINVAL;
2675                                         goto err_out1;
2676                                 }
2677                                 ksmbd_debug(SMB, "get posix context\n");
2678
2679                                 posix_mode = le32_to_cpu(posix->Mode);
2680                                 posix_ctxt = 1;
2681                         }
2682                 }
2683         }
2684
2685         if (ksmbd_override_fsids(work)) {
2686                 rc = -ENOMEM;
2687                 goto err_out1;
2688         }
2689
2690         rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1);
2691         if (!rc) {
2692                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2693                         /*
2694                          * If file exists with under flags, return access
2695                          * denied error.
2696                          */
2697                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2698                             req->CreateDisposition == FILE_OPEN_IF_LE) {
2699                                 rc = -EACCES;
2700                                 path_put(&path);
2701                                 goto err_out;
2702                         }
2703
2704                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2705                                 ksmbd_debug(SMB,
2706                                             "User does not have write permission\n");
2707                                 rc = -EACCES;
2708                                 path_put(&path);
2709                                 goto err_out;
2710                         }
2711                 } else if (d_is_symlink(path.dentry)) {
2712                         rc = -EACCES;
2713                         path_put(&path);
2714                         goto err_out;
2715                 }
2716         }
2717
2718         if (rc) {
2719                 if (rc != -ENOENT)
2720                         goto err_out;
2721                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2722                             name, rc);
2723                 rc = 0;
2724         } else {
2725                 file_present = true;
2726                 user_ns = mnt_user_ns(path.mnt);
2727                 generic_fillattr(user_ns, d_inode(path.dentry), &stat);
2728         }
2729         if (stream_name) {
2730                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2731                         if (s_type == DATA_STREAM) {
2732                                 rc = -EIO;
2733                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2734                         }
2735                 } else {
2736                         if (S_ISDIR(stat.mode) && s_type == DATA_STREAM) {
2737                                 rc = -EIO;
2738                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2739                         }
2740                 }
2741
2742                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2743                     req->FileAttributes & ATTR_NORMAL_LE) {
2744                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2745                         rc = -EIO;
2746                 }
2747
2748                 if (rc < 0)
2749                         goto err_out;
2750         }
2751
2752         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2753             S_ISDIR(stat.mode) && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2754                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2755                             name, req->CreateOptions);
2756                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2757                 rc = -EIO;
2758                 goto err_out;
2759         }
2760
2761         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2762             !(req->CreateDisposition == FILE_CREATE_LE) &&
2763             !S_ISDIR(stat.mode)) {
2764                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2765                 rc = -EIO;
2766                 goto err_out;
2767         }
2768
2769         if (!stream_name && file_present &&
2770             req->CreateDisposition == FILE_CREATE_LE) {
2771                 rc = -EEXIST;
2772                 goto err_out;
2773         }
2774
2775         daccess = smb_map_generic_desired_access(req->DesiredAccess);
2776
2777         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2778                 rc = smb_check_perm_dacl(conn, &path, &daccess,
2779                                          sess->user->uid);
2780                 if (rc)
2781                         goto err_out;
2782         }
2783
2784         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2785                 if (!file_present) {
2786                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2787                 } else {
2788                         rc = ksmbd_vfs_query_maximal_access(user_ns,
2789                                                             path.dentry,
2790                                                             &daccess);
2791                         if (rc)
2792                                 goto err_out;
2793                         already_permitted = true;
2794                 }
2795                 maximal_access = daccess;
2796         }
2797
2798         open_flags = smb2_create_open_flags(file_present, daccess,
2799                                             req->CreateDisposition,
2800                                             &may_flags);
2801
2802         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2803                 if (open_flags & O_CREAT) {
2804                         ksmbd_debug(SMB,
2805                                     "User does not have write permission\n");
2806                         rc = -EACCES;
2807                         goto err_out;
2808                 }
2809         }
2810
2811         /*create file if not present */
2812         if (!file_present) {
2813                 rc = smb2_creat(work, &path, name, open_flags, posix_mode,
2814                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2815                 if (rc) {
2816                         if (rc == -ENOENT) {
2817                                 rc = -EIO;
2818                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2819                         }
2820                         goto err_out;
2821                 }
2822
2823                 created = true;
2824                 user_ns = mnt_user_ns(path.mnt);
2825                 if (ea_buf) {
2826                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
2827                             sizeof(struct smb2_ea_info)) {
2828                                 rc = -EINVAL;
2829                                 goto err_out;
2830                         }
2831
2832                         rc = smb2_set_ea(&ea_buf->ea,
2833                                          le32_to_cpu(ea_buf->ccontext.DataLength),
2834                                          &path);
2835                         if (rc == -EOPNOTSUPP)
2836                                 rc = 0;
2837                         else if (rc)
2838                                 goto err_out;
2839                 }
2840         } else if (!already_permitted) {
2841                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
2842                  * because execute(search) permission on a parent directory,
2843                  * is already granted.
2844                  */
2845                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
2846                         rc = inode_permission(user_ns,
2847                                               d_inode(path.dentry),
2848                                               may_flags);
2849                         if (rc)
2850                                 goto err_out;
2851
2852                         if ((daccess & FILE_DELETE_LE) ||
2853                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2854                                 rc = ksmbd_vfs_may_delete(user_ns,
2855                                                           path.dentry);
2856                                 if (rc)
2857                                         goto err_out;
2858                         }
2859                 }
2860         }
2861
2862         rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
2863         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
2864                 rc = -EBUSY;
2865                 goto err_out;
2866         }
2867
2868         rc = 0;
2869         filp = dentry_open(&path, open_flags, current_cred());
2870         if (IS_ERR(filp)) {
2871                 rc = PTR_ERR(filp);
2872                 pr_err("dentry open for dir failed, rc %d\n", rc);
2873                 goto err_out;
2874         }
2875
2876         if (file_present) {
2877                 if (!(open_flags & O_TRUNC))
2878                         file_info = FILE_OPENED;
2879                 else
2880                         file_info = FILE_OVERWRITTEN;
2881
2882                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
2883                     FILE_SUPERSEDE_LE)
2884                         file_info = FILE_SUPERSEDED;
2885         } else if (open_flags & O_CREAT) {
2886                 file_info = FILE_CREATED;
2887         }
2888
2889         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
2890
2891         /* Obtain Volatile-ID */
2892         fp = ksmbd_open_fd(work, filp);
2893         if (IS_ERR(fp)) {
2894                 fput(filp);
2895                 rc = PTR_ERR(fp);
2896                 fp = NULL;
2897                 goto err_out;
2898         }
2899
2900         /* Get Persistent-ID */
2901         ksmbd_open_durable_fd(fp);
2902         if (!has_file_id(fp->persistent_id)) {
2903                 rc = -ENOMEM;
2904                 goto err_out;
2905         }
2906
2907         fp->filename = name;
2908         fp->cdoption = req->CreateDisposition;
2909         fp->daccess = daccess;
2910         fp->saccess = req->ShareAccess;
2911         fp->coption = req->CreateOptions;
2912
2913         /* Set default windows and posix acls if creating new file */
2914         if (created) {
2915                 int posix_acl_rc;
2916                 struct inode *inode = d_inode(path.dentry);
2917
2918                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(user_ns,
2919                                                            inode,
2920                                                            d_inode(path.dentry->d_parent));
2921                 if (posix_acl_rc)
2922                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
2923
2924                 if (test_share_config_flag(work->tcon->share_conf,
2925                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
2926                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
2927                                               sess->user->gid);
2928                 }
2929
2930                 if (rc) {
2931                         rc = smb2_create_sd_buffer(work, req, &path);
2932                         if (rc) {
2933                                 if (posix_acl_rc)
2934                                         ksmbd_vfs_set_init_posix_acl(user_ns,
2935                                                                      inode);
2936
2937                                 if (test_share_config_flag(work->tcon->share_conf,
2938                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
2939                                         struct smb_fattr fattr;
2940                                         struct smb_ntsd *pntsd;
2941                                         int pntsd_size, ace_num = 0;
2942
2943                                         ksmbd_acls_fattr(&fattr, user_ns, inode);
2944                                         if (fattr.cf_acls)
2945                                                 ace_num = fattr.cf_acls->a_count;
2946                                         if (fattr.cf_dacls)
2947                                                 ace_num += fattr.cf_dacls->a_count;
2948
2949                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
2950                                                         sizeof(struct smb_sid) * 3 +
2951                                                         sizeof(struct smb_acl) +
2952                                                         sizeof(struct smb_ace) * ace_num * 2,
2953                                                         GFP_KERNEL);
2954                                         if (!pntsd)
2955                                                 goto err_out;
2956
2957                                         rc = build_sec_desc(user_ns,
2958                                                             pntsd, NULL,
2959                                                             OWNER_SECINFO |
2960                                                             GROUP_SECINFO |
2961                                                             DACL_SECINFO,
2962                                                             &pntsd_size, &fattr);
2963                                         posix_acl_release(fattr.cf_acls);
2964                                         posix_acl_release(fattr.cf_dacls);
2965
2966                                         rc = ksmbd_vfs_set_sd_xattr(conn,
2967                                                                     user_ns,
2968                                                                     path.dentry,
2969                                                                     pntsd,
2970                                                                     pntsd_size);
2971                                         kfree(pntsd);
2972                                         if (rc)
2973                                                 pr_err("failed to store ntacl in xattr : %d\n",
2974                                                        rc);
2975                                 }
2976                         }
2977                 }
2978                 rc = 0;
2979         }
2980
2981         if (stream_name) {
2982                 rc = smb2_set_stream_name_xattr(&path,
2983                                                 fp,
2984                                                 stream_name,
2985                                                 s_type);
2986                 if (rc)
2987                         goto err_out;
2988                 file_info = FILE_CREATED;
2989         }
2990
2991         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
2992                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
2993         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
2994             !fp->attrib_only && !stream_name) {
2995                 smb_break_all_oplock(work, fp);
2996                 need_truncate = 1;
2997         }
2998
2999         /* fp should be searchable through ksmbd_inode.m_fp_list
3000          * after daccess, saccess, attrib_only, and stream are
3001          * initialized.
3002          */
3003         write_lock(&fp->f_ci->m_lock);
3004         list_add(&fp->node, &fp->f_ci->m_fp_list);
3005         write_unlock(&fp->f_ci->m_lock);
3006
3007         rc = ksmbd_vfs_getattr(&path, &stat);
3008         if (rc) {
3009                 generic_fillattr(user_ns, d_inode(path.dentry), &stat);
3010                 rc = 0;
3011         }
3012
3013         /* Check delete pending among previous fp before oplock break */
3014         if (ksmbd_inode_pending_delete(fp)) {
3015                 rc = -EBUSY;
3016                 goto err_out;
3017         }
3018
3019         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3020         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3021             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3022              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3023                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3024                         rc = share_ret;
3025                         goto err_out;
3026                 }
3027         } else {
3028                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3029                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3030                         ksmbd_debug(SMB,
3031                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3032                                     name, req_op_level, lc->req_state);
3033                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3034                         if (rc)
3035                                 goto err_out;
3036                 } else if (open_flags == O_RDONLY &&
3037                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3038                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3039                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3040
3041                 rc = smb_grant_oplock(work, req_op_level,
3042                                       fp->persistent_id, fp,
3043                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3044                                       lc, share_ret);
3045                 if (rc < 0)
3046                         goto err_out;
3047         }
3048
3049         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3050                 ksmbd_fd_set_delete_on_close(fp, file_info);
3051
3052         if (need_truncate) {
3053                 rc = smb2_create_truncate(&path);
3054                 if (rc)
3055                         goto err_out;
3056         }
3057
3058         if (req->CreateContextsOffset) {
3059                 struct create_alloc_size_req *az_req;
3060
3061                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3062                                         SMB2_CREATE_ALLOCATION_SIZE);
3063                 if (IS_ERR(az_req)) {
3064                         rc = PTR_ERR(az_req);
3065                         goto err_out;
3066                 } else if (az_req) {
3067                         loff_t alloc_size;
3068                         int err;
3069
3070                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3071                             le32_to_cpu(az_req->ccontext.DataLength) <
3072                             sizeof(struct create_alloc_size_req)) {
3073                                 rc = -EINVAL;
3074                                 goto err_out;
3075                         }
3076                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3077                         ksmbd_debug(SMB,
3078                                     "request smb2 create allocate size : %llu\n",
3079                                     alloc_size);
3080                         smb_break_all_levII_oplock(work, fp, 1);
3081                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3082                                             alloc_size);
3083                         if (err < 0)
3084                                 ksmbd_debug(SMB,
3085                                             "vfs_fallocate is failed : %d\n",
3086                                             err);
3087                 }
3088
3089                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID);
3090                 if (IS_ERR(context)) {
3091                         rc = PTR_ERR(context);
3092                         goto err_out;
3093                 } else if (context) {
3094                         ksmbd_debug(SMB, "get query on disk id context\n");
3095                         query_disk_id = 1;
3096                 }
3097         }
3098
3099         if (stat.result_mask & STATX_BTIME)
3100                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3101         else
3102                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3103         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3104                 fp->f_ci->m_fattr =
3105                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3106
3107         if (!created)
3108                 smb2_update_xattrs(tcon, &path, fp);
3109         else
3110                 smb2_new_xattrs(tcon, &path, fp);
3111
3112         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3113
3114         generic_fillattr(user_ns, file_inode(fp->filp),
3115                          &stat);
3116
3117         rsp->StructureSize = cpu_to_le16(89);
3118         rcu_read_lock();
3119         opinfo = rcu_dereference(fp->f_opinfo);
3120         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3121         rcu_read_unlock();
3122         rsp->Reserved = 0;
3123         rsp->CreateAction = cpu_to_le32(file_info);
3124         rsp->CreationTime = cpu_to_le64(fp->create_time);
3125         time = ksmbd_UnixTimeToNT(stat.atime);
3126         rsp->LastAccessTime = cpu_to_le64(time);
3127         time = ksmbd_UnixTimeToNT(stat.mtime);
3128         rsp->LastWriteTime = cpu_to_le64(time);
3129         time = ksmbd_UnixTimeToNT(stat.ctime);
3130         rsp->ChangeTime = cpu_to_le64(time);
3131         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3132                 cpu_to_le64(stat.blocks << 9);
3133         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3134         rsp->FileAttributes = fp->f_ci->m_fattr;
3135
3136         rsp->Reserved2 = 0;
3137
3138         rsp->PersistentFileId = cpu_to_le64(fp->persistent_id);
3139         rsp->VolatileFileId = cpu_to_le64(fp->volatile_id);
3140
3141         rsp->CreateContextsOffset = 0;
3142         rsp->CreateContextsLength = 0;
3143         inc_rfc1001_len(rsp_org, 88); /* StructureSize - 1*/
3144
3145         /* If lease is request send lease context response */
3146         if (opinfo && opinfo->is_lease) {
3147                 struct create_context *lease_ccontext;
3148
3149                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3150                             name, opinfo->o_lease->state);
3151                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3152
3153                 lease_ccontext = (struct create_context *)rsp->Buffer;
3154                 contxt_cnt++;
3155                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3156                 le32_add_cpu(&rsp->CreateContextsLength,
3157                              conn->vals->create_lease_size);
3158                 inc_rfc1001_len(rsp_org, conn->vals->create_lease_size);
3159                 next_ptr = &lease_ccontext->Next;
3160                 next_off = conn->vals->create_lease_size;
3161         }
3162
3163         if (maximal_access_ctxt) {
3164                 struct create_context *mxac_ccontext;
3165
3166                 if (maximal_access == 0)
3167                         ksmbd_vfs_query_maximal_access(user_ns,
3168                                                        path.dentry,
3169                                                        &maximal_access);
3170                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3171                                 le32_to_cpu(rsp->CreateContextsLength));
3172                 contxt_cnt++;
3173                 create_mxac_rsp_buf(rsp->Buffer +
3174                                 le32_to_cpu(rsp->CreateContextsLength),
3175                                 le32_to_cpu(maximal_access));
3176                 le32_add_cpu(&rsp->CreateContextsLength,
3177                              conn->vals->create_mxac_size);
3178                 inc_rfc1001_len(rsp_org, conn->vals->create_mxac_size);
3179                 if (next_ptr)
3180                         *next_ptr = cpu_to_le32(next_off);
3181                 next_ptr = &mxac_ccontext->Next;
3182                 next_off = conn->vals->create_mxac_size;
3183         }
3184
3185         if (query_disk_id) {
3186                 struct create_context *disk_id_ccontext;
3187
3188                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3189                                 le32_to_cpu(rsp->CreateContextsLength));
3190                 contxt_cnt++;
3191                 create_disk_id_rsp_buf(rsp->Buffer +
3192                                 le32_to_cpu(rsp->CreateContextsLength),
3193                                 stat.ino, tcon->id);
3194                 le32_add_cpu(&rsp->CreateContextsLength,
3195                              conn->vals->create_disk_id_size);
3196                 inc_rfc1001_len(rsp_org, conn->vals->create_disk_id_size);
3197                 if (next_ptr)
3198                         *next_ptr = cpu_to_le32(next_off);
3199                 next_ptr = &disk_id_ccontext->Next;
3200                 next_off = conn->vals->create_disk_id_size;
3201         }
3202
3203         if (posix_ctxt) {
3204                 contxt_cnt++;
3205                 create_posix_rsp_buf(rsp->Buffer +
3206                                 le32_to_cpu(rsp->CreateContextsLength),
3207                                 fp);
3208                 le32_add_cpu(&rsp->CreateContextsLength,
3209                              conn->vals->create_posix_size);
3210                 inc_rfc1001_len(rsp_org, conn->vals->create_posix_size);
3211                 if (next_ptr)
3212                         *next_ptr = cpu_to_le32(next_off);
3213         }
3214
3215         if (contxt_cnt > 0) {
3216                 rsp->CreateContextsOffset =
3217                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)
3218                         - 4);
3219         }
3220
3221 err_out:
3222         if (file_present || created)
3223                 path_put(&path);
3224         ksmbd_revert_fsids(work);
3225 err_out1:
3226         if (rc) {
3227                 if (rc == -EINVAL)
3228                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3229                 else if (rc == -EOPNOTSUPP)
3230                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3231                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3232                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3233                 else if (rc == -ENOENT)
3234                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3235                 else if (rc == -EPERM)
3236                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3237                 else if (rc == -EBUSY)
3238                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3239                 else if (rc == -EBADF)
3240                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3241                 else if (rc == -ENOEXEC)
3242                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3243                 else if (rc == -ENXIO)
3244                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3245                 else if (rc == -EEXIST)
3246                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3247                 else if (rc == -EMFILE)
3248                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3249                 if (!rsp->hdr.Status)
3250                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3251
3252                 if (!fp || !fp->filename)
3253                         kfree(name);
3254                 if (fp)
3255                         ksmbd_fd_put(work, fp);
3256                 smb2_set_err_rsp(work);
3257                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3258         }
3259
3260         kfree(lc);
3261
3262         return 0;
3263 }
3264
3265 static int readdir_info_level_struct_sz(int info_level)
3266 {
3267         switch (info_level) {
3268         case FILE_FULL_DIRECTORY_INFORMATION:
3269                 return sizeof(struct file_full_directory_info);
3270         case FILE_BOTH_DIRECTORY_INFORMATION:
3271                 return sizeof(struct file_both_directory_info);
3272         case FILE_DIRECTORY_INFORMATION:
3273                 return sizeof(struct file_directory_info);
3274         case FILE_NAMES_INFORMATION:
3275                 return sizeof(struct file_names_info);
3276         case FILEID_FULL_DIRECTORY_INFORMATION:
3277                 return sizeof(struct file_id_full_dir_info);
3278         case FILEID_BOTH_DIRECTORY_INFORMATION:
3279                 return sizeof(struct file_id_both_directory_info);
3280         case SMB_FIND_FILE_POSIX_INFO:
3281                 return sizeof(struct smb2_posix_info);
3282         default:
3283                 return -EOPNOTSUPP;
3284         }
3285 }
3286
3287 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3288 {
3289         switch (info_level) {
3290         case FILE_FULL_DIRECTORY_INFORMATION:
3291         {
3292                 struct file_full_directory_info *ffdinfo;
3293
3294                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3295                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3296                 d_info->name = ffdinfo->FileName;
3297                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3298                 return 0;
3299         }
3300         case FILE_BOTH_DIRECTORY_INFORMATION:
3301         {
3302                 struct file_both_directory_info *fbdinfo;
3303
3304                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3305                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3306                 d_info->name = fbdinfo->FileName;
3307                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3308                 return 0;
3309         }
3310         case FILE_DIRECTORY_INFORMATION:
3311         {
3312                 struct file_directory_info *fdinfo;
3313
3314                 fdinfo = (struct file_directory_info *)d_info->rptr;
3315                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3316                 d_info->name = fdinfo->FileName;
3317                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3318                 return 0;
3319         }
3320         case FILE_NAMES_INFORMATION:
3321         {
3322                 struct file_names_info *fninfo;
3323
3324                 fninfo = (struct file_names_info *)d_info->rptr;
3325                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3326                 d_info->name = fninfo->FileName;
3327                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3328                 return 0;
3329         }
3330         case FILEID_FULL_DIRECTORY_INFORMATION:
3331         {
3332                 struct file_id_full_dir_info *dinfo;
3333
3334                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3335                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3336                 d_info->name = dinfo->FileName;
3337                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3338                 return 0;
3339         }
3340         case FILEID_BOTH_DIRECTORY_INFORMATION:
3341         {
3342                 struct file_id_both_directory_info *fibdinfo;
3343
3344                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3345                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3346                 d_info->name = fibdinfo->FileName;
3347                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3348                 return 0;
3349         }
3350         case SMB_FIND_FILE_POSIX_INFO:
3351         {
3352                 struct smb2_posix_info *posix_info;
3353
3354                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3355                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3356                 d_info->name = posix_info->name;
3357                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3358                 return 0;
3359         }
3360         default:
3361                 return -EINVAL;
3362         }
3363 }
3364
3365 /**
3366  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3367  * buffer
3368  * @conn:       connection instance
3369  * @info_level: smb information level
3370  * @d_info:     structure included variables for query dir
3371  * @user_ns:    user namespace
3372  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3373  *
3374  * if directory has many entries, find first can't read it fully.
3375  * find next might be called multiple times to read remaining dir entries
3376  *
3377  * Return:      0 on success, otherwise error
3378  */
3379 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3380                                        struct ksmbd_dir_info *d_info,
3381                                        struct ksmbd_kstat *ksmbd_kstat)
3382 {
3383         int next_entry_offset = 0;
3384         char *conv_name;
3385         int conv_len;
3386         void *kstat;
3387         int struct_sz, rc = 0;
3388
3389         conv_name = ksmbd_convert_dir_info_name(d_info,
3390                                                 conn->local_nls,
3391                                                 &conv_len);
3392         if (!conv_name)
3393                 return -ENOMEM;
3394
3395         /* Somehow the name has only terminating NULL bytes */
3396         if (conv_len < 0) {
3397                 rc = -EINVAL;
3398                 goto free_conv_name;
3399         }
3400
3401         struct_sz = readdir_info_level_struct_sz(info_level);
3402         next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
3403                                   KSMBD_DIR_INFO_ALIGNMENT);
3404
3405         if (next_entry_offset > d_info->out_buf_len) {
3406                 d_info->out_buf_len = 0;
3407                 rc = -ENOSPC;
3408                 goto free_conv_name;
3409         }
3410
3411         kstat = d_info->wptr;
3412         if (info_level != FILE_NAMES_INFORMATION)
3413                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3414
3415         switch (info_level) {
3416         case FILE_FULL_DIRECTORY_INFORMATION:
3417         {
3418                 struct file_full_directory_info *ffdinfo;
3419
3420                 ffdinfo = (struct file_full_directory_info *)kstat;
3421                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3422                 ffdinfo->EaSize =
3423                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3424                 if (ffdinfo->EaSize)
3425                         ffdinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
3426                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3427                         ffdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3428                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3429                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3430                 break;
3431         }
3432         case FILE_BOTH_DIRECTORY_INFORMATION:
3433         {
3434                 struct file_both_directory_info *fbdinfo;
3435
3436                 fbdinfo = (struct file_both_directory_info *)kstat;
3437                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3438                 fbdinfo->EaSize =
3439                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3440                 if (fbdinfo->EaSize)
3441                         fbdinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
3442                 fbdinfo->ShortNameLength = 0;
3443                 fbdinfo->Reserved = 0;
3444                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3445                         fbdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3446                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3447                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3448                 break;
3449         }
3450         case FILE_DIRECTORY_INFORMATION:
3451         {
3452                 struct file_directory_info *fdinfo;
3453
3454                 fdinfo = (struct file_directory_info *)kstat;
3455                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3456                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3457                         fdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3458                 memcpy(fdinfo->FileName, conv_name, conv_len);
3459                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3460                 break;
3461         }
3462         case FILE_NAMES_INFORMATION:
3463         {
3464                 struct file_names_info *fninfo;
3465
3466                 fninfo = (struct file_names_info *)kstat;
3467                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3468                 memcpy(fninfo->FileName, conv_name, conv_len);
3469                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3470                 break;
3471         }
3472         case FILEID_FULL_DIRECTORY_INFORMATION:
3473         {
3474                 struct file_id_full_dir_info *dinfo;
3475
3476                 dinfo = (struct file_id_full_dir_info *)kstat;
3477                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3478                 dinfo->EaSize =
3479                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3480                 if (dinfo->EaSize)
3481                         dinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
3482                 dinfo->Reserved = 0;
3483                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3484                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3485                         dinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3486                 memcpy(dinfo->FileName, conv_name, conv_len);
3487                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3488                 break;
3489         }
3490         case FILEID_BOTH_DIRECTORY_INFORMATION:
3491         {
3492                 struct file_id_both_directory_info *fibdinfo;
3493
3494                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3495                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3496                 fibdinfo->EaSize =
3497                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3498                 if (fibdinfo->EaSize)
3499                         fibdinfo->ExtFileAttributes = ATTR_REPARSE_POINT_LE;
3500                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3501                 fibdinfo->ShortNameLength = 0;
3502                 fibdinfo->Reserved = 0;
3503                 fibdinfo->Reserved2 = cpu_to_le16(0);
3504                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3505                         fibdinfo->ExtFileAttributes |= ATTR_HIDDEN_LE;
3506                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3507                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3508                 break;
3509         }
3510         case SMB_FIND_FILE_POSIX_INFO:
3511         {
3512                 struct smb2_posix_info *posix_info;
3513                 u64 time;
3514
3515                 posix_info = (struct smb2_posix_info *)kstat;
3516                 posix_info->Ignored = 0;
3517                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3518                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3519                 posix_info->ChangeTime = cpu_to_le64(time);
3520                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3521                 posix_info->LastAccessTime = cpu_to_le64(time);
3522                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3523                 posix_info->LastWriteTime = cpu_to_le64(time);
3524                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3525                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3526                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3527                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3528                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode);
3529                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3530                 posix_info->DosAttributes =
3531                         S_ISDIR(ksmbd_kstat->kstat->mode) ? ATTR_DIRECTORY_LE : ATTR_ARCHIVE_LE;
3532                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3533                         posix_info->DosAttributes |= ATTR_HIDDEN_LE;
3534                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3535                           SIDNFS_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3536                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3537                           SIDNFS_GROUP, (struct smb_sid *)&posix_info->SidBuffer[20]);
3538                 memcpy(posix_info->name, conv_name, conv_len);
3539                 posix_info->name_len = cpu_to_le32(conv_len);
3540                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3541                 break;
3542         }
3543
3544         } /* switch (info_level) */
3545
3546         d_info->last_entry_offset = d_info->data_count;
3547         d_info->data_count += next_entry_offset;
3548         d_info->out_buf_len -= next_entry_offset;
3549         d_info->wptr += next_entry_offset;
3550
3551         ksmbd_debug(SMB,
3552                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3553                     info_level, d_info->out_buf_len,
3554                     next_entry_offset, d_info->data_count);
3555
3556 free_conv_name:
3557         kfree(conv_name);
3558         return rc;
3559 }
3560
3561 struct smb2_query_dir_private {
3562         struct ksmbd_work       *work;
3563         char                    *search_pattern;
3564         struct ksmbd_file       *dir_fp;
3565
3566         struct ksmbd_dir_info   *d_info;
3567         int                     info_level;
3568 };
3569
3570 static void lock_dir(struct ksmbd_file *dir_fp)
3571 {
3572         struct dentry *dir = dir_fp->filp->f_path.dentry;
3573
3574         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3575 }
3576
3577 static void unlock_dir(struct ksmbd_file *dir_fp)
3578 {
3579         struct dentry *dir = dir_fp->filp->f_path.dentry;
3580
3581         inode_unlock(d_inode(dir));
3582 }
3583
3584 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3585 {
3586         struct user_namespace   *user_ns = file_mnt_user_ns(priv->dir_fp->filp);
3587         struct kstat            kstat;
3588         struct ksmbd_kstat      ksmbd_kstat;
3589         int                     rc;
3590         int                     i;
3591
3592         for (i = 0; i < priv->d_info->num_entry; i++) {
3593                 struct dentry *dent;
3594
3595                 if (dentry_name(priv->d_info, priv->info_level))
3596                         return -EINVAL;
3597
3598                 lock_dir(priv->dir_fp);
3599                 dent = lookup_one(user_ns, priv->d_info->name,
3600                                   priv->dir_fp->filp->f_path.dentry,
3601                                   priv->d_info->name_len);
3602                 unlock_dir(priv->dir_fp);
3603
3604                 if (IS_ERR(dent)) {
3605                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3606                                     priv->d_info->name,
3607                                     PTR_ERR(dent));
3608                         continue;
3609                 }
3610                 if (unlikely(d_is_negative(dent))) {
3611                         dput(dent);
3612                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
3613                                     priv->d_info->name);
3614                         continue;
3615                 }
3616
3617                 ksmbd_kstat.kstat = &kstat;
3618                 if (priv->info_level != FILE_NAMES_INFORMATION)
3619                         ksmbd_vfs_fill_dentry_attrs(priv->work,
3620                                                     user_ns,
3621                                                     dent,
3622                                                     &ksmbd_kstat);
3623
3624                 rc = smb2_populate_readdir_entry(priv->work->conn,
3625                                                  priv->info_level,
3626                                                  priv->d_info,
3627                                                  &ksmbd_kstat);
3628                 dput(dent);
3629                 if (rc)
3630                         return rc;
3631         }
3632         return 0;
3633 }
3634
3635 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3636                                    int info_level)
3637 {
3638         int struct_sz;
3639         int conv_len;
3640         int next_entry_offset;
3641
3642         struct_sz = readdir_info_level_struct_sz(info_level);
3643         if (struct_sz == -EOPNOTSUPP)
3644                 return -EOPNOTSUPP;
3645
3646         conv_len = (d_info->name_len + 1) * 2;
3647         next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
3648                                   KSMBD_DIR_INFO_ALIGNMENT);
3649
3650         if (next_entry_offset > d_info->out_buf_len) {
3651                 d_info->out_buf_len = 0;
3652                 return -ENOSPC;
3653         }
3654
3655         switch (info_level) {
3656         case FILE_FULL_DIRECTORY_INFORMATION:
3657         {
3658                 struct file_full_directory_info *ffdinfo;
3659
3660                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3661                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3662                 ffdinfo->FileName[d_info->name_len] = 0x00;
3663                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3664                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3665                 break;
3666         }
3667         case FILE_BOTH_DIRECTORY_INFORMATION:
3668         {
3669                 struct file_both_directory_info *fbdinfo;
3670
3671                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3672                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3673                 fbdinfo->FileName[d_info->name_len] = 0x00;
3674                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3675                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3676                 break;
3677         }
3678         case FILE_DIRECTORY_INFORMATION:
3679         {
3680                 struct file_directory_info *fdinfo;
3681
3682                 fdinfo = (struct file_directory_info *)d_info->wptr;
3683                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3684                 fdinfo->FileName[d_info->name_len] = 0x00;
3685                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3686                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3687                 break;
3688         }
3689         case FILE_NAMES_INFORMATION:
3690         {
3691                 struct file_names_info *fninfo;
3692
3693                 fninfo = (struct file_names_info *)d_info->wptr;
3694                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3695                 fninfo->FileName[d_info->name_len] = 0x00;
3696                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3697                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3698                 break;
3699         }
3700         case FILEID_FULL_DIRECTORY_INFORMATION:
3701         {
3702                 struct file_id_full_dir_info *dinfo;
3703
3704                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3705                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3706                 dinfo->FileName[d_info->name_len] = 0x00;
3707                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3708                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3709                 break;
3710         }
3711         case FILEID_BOTH_DIRECTORY_INFORMATION:
3712         {
3713                 struct file_id_both_directory_info *fibdinfo;
3714
3715                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3716                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3717                 fibdinfo->FileName[d_info->name_len] = 0x00;
3718                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3719                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3720                 break;
3721         }
3722         case SMB_FIND_FILE_POSIX_INFO:
3723         {
3724                 struct smb2_posix_info *posix_info;
3725
3726                 posix_info = (struct smb2_posix_info *)d_info->wptr;
3727                 memcpy(posix_info->name, d_info->name, d_info->name_len);
3728                 posix_info->name[d_info->name_len] = 0x00;
3729                 posix_info->name_len = cpu_to_le32(d_info->name_len);
3730                 posix_info->NextEntryOffset =
3731                         cpu_to_le32(next_entry_offset);
3732                 break;
3733         }
3734         } /* switch (info_level) */
3735
3736         d_info->num_entry++;
3737         d_info->out_buf_len -= next_entry_offset;
3738         d_info->wptr += next_entry_offset;
3739         return 0;
3740 }
3741
3742 static int __query_dir(struct dir_context *ctx, const char *name, int namlen,
3743                        loff_t offset, u64 ino, unsigned int d_type)
3744 {
3745         struct ksmbd_readdir_data       *buf;
3746         struct smb2_query_dir_private   *priv;
3747         struct ksmbd_dir_info           *d_info;
3748         int                             rc;
3749
3750         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
3751         priv    = buf->private;
3752         d_info  = priv->d_info;
3753
3754         /* dot and dotdot entries are already reserved */
3755         if (!strcmp(".", name) || !strcmp("..", name))
3756                 return 0;
3757         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3758                 return 0;
3759         if (!match_pattern(name, namlen, priv->search_pattern))
3760                 return 0;
3761
3762         d_info->name            = name;
3763         d_info->name_len        = namlen;
3764         rc = reserve_populate_dentry(d_info, priv->info_level);
3765         if (rc)
3766                 return rc;
3767         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) {
3768                 d_info->out_buf_len = 0;
3769                 return 0;
3770         }
3771         return 0;
3772 }
3773
3774 static void restart_ctx(struct dir_context *ctx)
3775 {
3776         ctx->pos = 0;
3777 }
3778
3779 static int verify_info_level(int info_level)
3780 {
3781         switch (info_level) {
3782         case FILE_FULL_DIRECTORY_INFORMATION:
3783         case FILE_BOTH_DIRECTORY_INFORMATION:
3784         case FILE_DIRECTORY_INFORMATION:
3785         case FILE_NAMES_INFORMATION:
3786         case FILEID_FULL_DIRECTORY_INFORMATION:
3787         case FILEID_BOTH_DIRECTORY_INFORMATION:
3788         case SMB_FIND_FILE_POSIX_INFO:
3789                 break;
3790         default:
3791                 return -EOPNOTSUPP;
3792         }
3793
3794         return 0;
3795 }
3796
3797 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
3798                                      unsigned short hdr2_len,
3799                                      unsigned int out_buf_len)
3800 {
3801         int free_len;
3802
3803         if (out_buf_len > work->conn->vals->max_trans_size)
3804                 return -EINVAL;
3805
3806         free_len = (int)(work->response_sz -
3807                          (get_rfc1002_len(work->response_buf) + 4)) -
3808                 hdr2_len;
3809         if (free_len < 0)
3810                 return -EINVAL;
3811
3812         return min_t(int, out_buf_len, free_len);
3813 }
3814
3815 int smb2_query_dir(struct ksmbd_work *work)
3816 {
3817         struct ksmbd_conn *conn = work->conn;
3818         struct smb2_query_directory_req *req;
3819         struct smb2_query_directory_rsp *rsp, *rsp_org;
3820         struct ksmbd_share_config *share = work->tcon->share_conf;
3821         struct ksmbd_file *dir_fp = NULL;
3822         struct ksmbd_dir_info d_info;
3823         int rc = 0;
3824         char *srch_ptr = NULL;
3825         unsigned char srch_flag;
3826         int buffer_sz;
3827         struct smb2_query_dir_private query_dir_private = {NULL, };
3828
3829         rsp_org = work->response_buf;
3830         WORK_BUFFERS(work, req, rsp);
3831
3832         if (ksmbd_override_fsids(work)) {
3833                 rsp->hdr.Status = STATUS_NO_MEMORY;
3834                 smb2_set_err_rsp(work);
3835                 return -ENOMEM;
3836         }
3837
3838         rc = verify_info_level(req->FileInformationClass);
3839         if (rc) {
3840                 rc = -EFAULT;
3841                 goto err_out2;
3842         }
3843
3844         dir_fp = ksmbd_lookup_fd_slow(work,
3845                                       le64_to_cpu(req->VolatileFileId),
3846                                       le64_to_cpu(req->PersistentFileId));
3847         if (!dir_fp) {
3848                 rc = -EBADF;
3849                 goto err_out2;
3850         }
3851
3852         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
3853             inode_permission(file_mnt_user_ns(dir_fp->filp),
3854                              file_inode(dir_fp->filp),
3855                              MAY_READ | MAY_EXEC)) {
3856                 pr_err("no right to enumerate directory (%pd)\n",
3857                        dir_fp->filp->f_path.dentry);
3858                 rc = -EACCES;
3859                 goto err_out2;
3860         }
3861
3862         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
3863                 pr_err("can't do query dir for a file\n");
3864                 rc = -EINVAL;
3865                 goto err_out2;
3866         }
3867
3868         srch_flag = req->Flags;
3869         srch_ptr = smb_strndup_from_utf16(req->Buffer,
3870                                           le16_to_cpu(req->FileNameLength), 1,
3871                                           conn->local_nls);
3872         if (IS_ERR(srch_ptr)) {
3873                 ksmbd_debug(SMB, "Search Pattern not found\n");
3874                 rc = -EINVAL;
3875                 goto err_out2;
3876         } else {
3877                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
3878         }
3879
3880         ksmbd_debug(SMB, "Directory name is %s\n", dir_fp->filename);
3881
3882         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
3883                 ksmbd_debug(SMB, "Restart directory scan\n");
3884                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
3885                 restart_ctx(&dir_fp->readdir_data.ctx);
3886         }
3887
3888         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
3889         d_info.wptr = (char *)rsp->Buffer;
3890         d_info.rptr = (char *)rsp->Buffer;
3891         d_info.out_buf_len =
3892                 smb2_calc_max_out_buf_len(work, 8,
3893                                           le32_to_cpu(req->OutputBufferLength));
3894         if (d_info.out_buf_len < 0) {
3895                 rc = -EINVAL;
3896                 goto err_out;
3897         }
3898         d_info.flags = srch_flag;
3899
3900         /*
3901          * reserve dot and dotdot entries in head of buffer
3902          * in first response
3903          */
3904         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
3905                                                dir_fp, &d_info, srch_ptr,
3906                                                smb2_populate_readdir_entry);
3907         if (rc == -ENOSPC)
3908                 rc = 0;
3909         else if (rc)
3910                 goto err_out;
3911
3912         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
3913                 d_info.hide_dot_file = true;
3914
3915         buffer_sz                               = d_info.out_buf_len;
3916         d_info.rptr                             = d_info.wptr;
3917         query_dir_private.work                  = work;
3918         query_dir_private.search_pattern        = srch_ptr;
3919         query_dir_private.dir_fp                = dir_fp;
3920         query_dir_private.d_info                = &d_info;
3921         query_dir_private.info_level            = req->FileInformationClass;
3922         dir_fp->readdir_data.private            = &query_dir_private;
3923         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
3924
3925         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
3926         if (rc == 0)
3927                 restart_ctx(&dir_fp->readdir_data.ctx);
3928         if (rc == -ENOSPC)
3929                 rc = 0;
3930         if (rc)
3931                 goto err_out;
3932
3933         d_info.wptr = d_info.rptr;
3934         d_info.out_buf_len = buffer_sz;
3935         rc = process_query_dir_entries(&query_dir_private);
3936         if (rc)
3937                 goto err_out;
3938
3939         if (!d_info.data_count && d_info.out_buf_len >= 0) {
3940                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
3941                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
3942                 } else {
3943                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
3944                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
3945                 }
3946                 rsp->StructureSize = cpu_to_le16(9);
3947                 rsp->OutputBufferOffset = cpu_to_le16(0);
3948                 rsp->OutputBufferLength = cpu_to_le32(0);
3949                 rsp->Buffer[0] = 0;
3950                 inc_rfc1001_len(rsp_org, 9);
3951         } else {
3952                 ((struct file_directory_info *)
3953                 ((char *)rsp->Buffer + d_info.last_entry_offset))
3954                 ->NextEntryOffset = 0;
3955
3956                 rsp->StructureSize = cpu_to_le16(9);
3957                 rsp->OutputBufferOffset = cpu_to_le16(72);
3958                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
3959                 inc_rfc1001_len(rsp_org, 8 + d_info.data_count);
3960         }
3961
3962         kfree(srch_ptr);
3963         ksmbd_fd_put(work, dir_fp);
3964         ksmbd_revert_fsids(work);
3965         return 0;
3966
3967 err_out:
3968         pr_err("error while processing smb2 query dir rc = %d\n", rc);
3969         kfree(srch_ptr);
3970
3971 err_out2:
3972         if (rc == -EINVAL)
3973                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3974         else if (rc == -EACCES)
3975                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3976         else if (rc == -ENOENT)
3977                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
3978         else if (rc == -EBADF)
3979                 rsp->hdr.Status = STATUS_FILE_CLOSED;
3980         else if (rc == -ENOMEM)
3981                 rsp->hdr.Status = STATUS_NO_MEMORY;
3982         else if (rc == -EFAULT)
3983                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
3984         if (!rsp->hdr.Status)
3985                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3986
3987         smb2_set_err_rsp(work);
3988         ksmbd_fd_put(work, dir_fp);
3989         ksmbd_revert_fsids(work);
3990         return 0;
3991 }
3992
3993 /**
3994  * buffer_check_err() - helper function to check buffer errors
3995  * @reqOutputBufferLength:      max buffer length expected in command response
3996  * @rsp:                query info response buffer contains output buffer length
3997  * @infoclass_size:     query info class response buffer size
3998  *
3999  * Return:      0 on success, otherwise error
4000  */
4001 static int buffer_check_err(int reqOutputBufferLength,
4002                             struct smb2_query_info_rsp *rsp, int infoclass_size)
4003 {
4004         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4005                 if (reqOutputBufferLength < infoclass_size) {
4006                         pr_err("Invalid Buffer Size Requested\n");
4007                         rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4008                         rsp->hdr.smb2_buf_length = cpu_to_be32(sizeof(struct smb2_hdr) - 4);
4009                         return -EINVAL;
4010                 }
4011
4012                 ksmbd_debug(SMB, "Buffer Overflow\n");
4013                 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
4014                 rsp->hdr.smb2_buf_length = cpu_to_be32(sizeof(struct smb2_hdr) - 4 +
4015                                 reqOutputBufferLength);
4016                 rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength);
4017         }
4018         return 0;
4019 }
4020
4021 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp)
4022 {
4023         struct smb2_file_standard_info *sinfo;
4024
4025         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4026
4027         sinfo->AllocationSize = cpu_to_le64(4096);
4028         sinfo->EndOfFile = cpu_to_le64(0);
4029         sinfo->NumberOfLinks = cpu_to_le32(1);
4030         sinfo->DeletePending = 1;
4031         sinfo->Directory = 0;
4032         rsp->OutputBufferLength =
4033                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4034         inc_rfc1001_len(rsp, sizeof(struct smb2_file_standard_info));
4035 }
4036
4037 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num)
4038 {
4039         struct smb2_file_internal_info *file_info;
4040
4041         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4042
4043         /* any unique number */
4044         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4045         rsp->OutputBufferLength =
4046                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4047         inc_rfc1001_len(rsp, sizeof(struct smb2_file_internal_info));
4048 }
4049
4050 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4051                                    struct smb2_query_info_req *req,
4052                                    struct smb2_query_info_rsp *rsp)
4053 {
4054         u64 id;
4055         int rc;
4056
4057         /*
4058          * Windows can sometime send query file info request on
4059          * pipe without opening it, checking error condition here
4060          */
4061         id = le64_to_cpu(req->VolatileFileId);
4062         if (!ksmbd_session_rpc_method(sess, id))
4063                 return -ENOENT;
4064
4065         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4066                     req->FileInfoClass, le64_to_cpu(req->VolatileFileId));
4067
4068         switch (req->FileInfoClass) {
4069         case FILE_STANDARD_INFORMATION:
4070                 get_standard_info_pipe(rsp);
4071                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4072                                       rsp, FILE_STANDARD_INFORMATION_SIZE);
4073                 break;
4074         case FILE_INTERNAL_INFORMATION:
4075                 get_internal_info_pipe(rsp, id);
4076                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4077                                       rsp, FILE_INTERNAL_INFORMATION_SIZE);
4078                 break;
4079         default:
4080                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4081                             req->FileInfoClass);
4082                 rc = -EOPNOTSUPP;
4083         }
4084         return rc;
4085 }
4086
4087 /**
4088  * smb2_get_ea() - handler for smb2 get extended attribute command
4089  * @work:       smb work containing query info command buffer
4090  * @fp:         ksmbd_file pointer
4091  * @req:        get extended attribute request
4092  * @rsp:        response buffer pointer
4093  * @rsp_org:    base response buffer pointer in case of chained response
4094  *
4095  * Return:      0 on success, otherwise error
4096  */
4097 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4098                        struct smb2_query_info_req *req,
4099                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4100 {
4101         struct smb2_ea_info *eainfo, *prev_eainfo;
4102         char *name, *ptr, *xattr_list = NULL, *buf;
4103         int rc, name_len, value_len, xattr_list_len, idx;
4104         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4105         struct smb2_ea_info_req *ea_req = NULL;
4106         struct path *path;
4107         struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
4108
4109         if (!(fp->daccess & FILE_READ_EA_LE)) {
4110                 pr_err("Not permitted to read ext attr : 0x%x\n",
4111                        fp->daccess);
4112                 return -EACCES;
4113         }
4114
4115         path = &fp->filp->f_path;
4116         /* single EA entry is requested with given user.* name */
4117         if (req->InputBufferLength) {
4118                 if (le32_to_cpu(req->InputBufferLength) <
4119                     sizeof(struct smb2_ea_info_req))
4120                         return -EINVAL;
4121
4122                 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4123         } else {
4124                 /* need to send all EAs, if no specific EA is requested*/
4125                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4126                         ksmbd_debug(SMB,
4127                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4128                                     le32_to_cpu(req->Flags));
4129         }
4130
4131         buf_free_len =
4132                 smb2_calc_max_out_buf_len(work, 8,
4133                                           le32_to_cpu(req->OutputBufferLength));
4134         if (buf_free_len < 0)
4135                 return -EINVAL;
4136
4137         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4138         if (rc < 0) {
4139                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4140                 goto out;
4141         } else if (!rc) { /* there is no EA in the file */
4142                 ksmbd_debug(SMB, "no ea data in the file\n");
4143                 goto done;
4144         }
4145         xattr_list_len = rc;
4146
4147         ptr = (char *)rsp->Buffer;
4148         eainfo = (struct smb2_ea_info *)ptr;
4149         prev_eainfo = eainfo;
4150         idx = 0;
4151
4152         while (idx < xattr_list_len) {
4153                 name = xattr_list + idx;
4154                 name_len = strlen(name);
4155
4156                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4157                 idx += name_len + 1;
4158
4159                 /*
4160                  * CIFS does not support EA other than user.* namespace,
4161                  * still keep the framework generic, to list other attrs
4162                  * in future.
4163                  */
4164                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4165                         continue;
4166
4167                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4168                              STREAM_PREFIX_LEN))
4169                         continue;
4170
4171                 if (req->InputBufferLength &&
4172                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4173                             ea_req->EaNameLength))
4174                         continue;
4175
4176                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4177                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4178                         continue;
4179
4180                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4181                         name_len -= XATTR_USER_PREFIX_LEN;
4182
4183                 ptr = (char *)(&eainfo->name + name_len + 1);
4184                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4185                                 name_len + 1);
4186                 /* bailout if xattr can't fit in buf_free_len */
4187                 value_len = ksmbd_vfs_getxattr(user_ns, path->dentry,
4188                                                name, &buf);
4189                 if (value_len <= 0) {
4190                         rc = -ENOENT;
4191                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4192                         goto out;
4193                 }
4194
4195                 buf_free_len -= value_len;
4196                 if (buf_free_len < 0) {
4197                         kfree(buf);
4198                         break;
4199                 }
4200
4201                 memcpy(ptr, buf, value_len);
4202                 kfree(buf);
4203
4204                 ptr += value_len;
4205                 eainfo->Flags = 0;
4206                 eainfo->EaNameLength = name_len;
4207
4208                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4209                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4210                                name_len);
4211                 else
4212                         memcpy(eainfo->name, name, name_len);
4213
4214                 eainfo->name[name_len] = '\0';
4215                 eainfo->EaValueLength = cpu_to_le16(value_len);
4216                 next_offset = offsetof(struct smb2_ea_info, name) +
4217                         name_len + 1 + value_len;
4218
4219                 /* align next xattr entry at 4 byte bundary */
4220                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4221                 if (alignment_bytes) {
4222                         memset(ptr, '\0', alignment_bytes);
4223                         ptr += alignment_bytes;
4224                         next_offset += alignment_bytes;
4225                         buf_free_len -= alignment_bytes;
4226                 }
4227                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4228                 prev_eainfo = eainfo;
4229                 eainfo = (struct smb2_ea_info *)ptr;
4230                 rsp_data_cnt += next_offset;
4231
4232                 if (req->InputBufferLength) {
4233                         ksmbd_debug(SMB, "single entry requested\n");
4234                         break;
4235                 }
4236         }
4237
4238         /* no more ea entries */
4239         prev_eainfo->NextEntryOffset = 0;
4240 done:
4241         rc = 0;
4242         if (rsp_data_cnt == 0)
4243                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4244         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4245         inc_rfc1001_len(rsp_org, rsp_data_cnt);
4246 out:
4247         kvfree(xattr_list);
4248         return rc;
4249 }
4250
4251 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4252                                  struct ksmbd_file *fp, void *rsp_org)
4253 {
4254         struct smb2_file_access_info *file_info;
4255
4256         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4257         file_info->AccessFlags = fp->daccess;
4258         rsp->OutputBufferLength =
4259                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4260         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info));
4261 }
4262
4263 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4264                                struct ksmbd_file *fp, void *rsp_org)
4265 {
4266         struct smb2_file_basic_info *basic_info;
4267         struct kstat stat;
4268         u64 time;
4269
4270         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4271                 pr_err("no right to read the attributes : 0x%x\n",
4272                        fp->daccess);
4273                 return -EACCES;
4274         }
4275
4276         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4277         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4278                          &stat);
4279         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4280         time = ksmbd_UnixTimeToNT(stat.atime);
4281         basic_info->LastAccessTime = cpu_to_le64(time);
4282         time = ksmbd_UnixTimeToNT(stat.mtime);
4283         basic_info->LastWriteTime = cpu_to_le64(time);
4284         time = ksmbd_UnixTimeToNT(stat.ctime);
4285         basic_info->ChangeTime = cpu_to_le64(time);
4286         basic_info->Attributes = fp->f_ci->m_fattr;
4287         basic_info->Pad1 = 0;
4288         rsp->OutputBufferLength =
4289                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4290         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info));
4291         return 0;
4292 }
4293
4294 static unsigned long long get_allocation_size(struct inode *inode,
4295                                               struct kstat *stat)
4296 {
4297         unsigned long long alloc_size = 0;
4298
4299         if (!S_ISDIR(stat->mode)) {
4300                 if ((inode->i_blocks << 9) <= stat->size)
4301                         alloc_size = stat->size;
4302                 else
4303                         alloc_size = inode->i_blocks << 9;
4304         }
4305
4306         return alloc_size;
4307 }
4308
4309 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4310                                    struct ksmbd_file *fp, void *rsp_org)
4311 {
4312         struct smb2_file_standard_info *sinfo;
4313         unsigned int delete_pending;
4314         struct inode *inode;
4315         struct kstat stat;
4316
4317         inode = file_inode(fp->filp);
4318         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4319
4320         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4321         delete_pending = ksmbd_inode_pending_delete(fp);
4322
4323         sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat));
4324         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4325         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4326         sinfo->DeletePending = delete_pending;
4327         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4328         rsp->OutputBufferLength =
4329                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4330         inc_rfc1001_len(rsp_org,
4331                         sizeof(struct smb2_file_standard_info));
4332 }
4333
4334 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4335                                     void *rsp_org)
4336 {
4337         struct smb2_file_alignment_info *file_info;
4338
4339         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4340         file_info->AlignmentRequirement = 0;
4341         rsp->OutputBufferLength =
4342                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4343         inc_rfc1001_len(rsp_org,
4344                         sizeof(struct smb2_file_alignment_info));
4345 }
4346
4347 static int get_file_all_info(struct ksmbd_work *work,
4348                              struct smb2_query_info_rsp *rsp,
4349                              struct ksmbd_file *fp,
4350                              void *rsp_org)
4351 {
4352         struct ksmbd_conn *conn = work->conn;
4353         struct smb2_file_all_info *file_info;
4354         unsigned int delete_pending;
4355         struct inode *inode;
4356         struct kstat stat;
4357         int conv_len;
4358         char *filename;
4359         u64 time;
4360
4361         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4362                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4363                             fp->daccess);
4364                 return -EACCES;
4365         }
4366
4367         filename = convert_to_nt_pathname(fp->filename);
4368         if (!filename)
4369                 return -ENOMEM;
4370
4371         inode = file_inode(fp->filp);
4372         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4373
4374         ksmbd_debug(SMB, "filename = %s\n", filename);
4375         delete_pending = ksmbd_inode_pending_delete(fp);
4376         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4377
4378         file_info->CreationTime = cpu_to_le64(fp->create_time);
4379         time = ksmbd_UnixTimeToNT(stat.atime);
4380         file_info->LastAccessTime = cpu_to_le64(time);
4381         time = ksmbd_UnixTimeToNT(stat.mtime);
4382         file_info->LastWriteTime = cpu_to_le64(time);
4383         time = ksmbd_UnixTimeToNT(stat.ctime);
4384         file_info->ChangeTime = cpu_to_le64(time);
4385         file_info->Attributes = fp->f_ci->m_fattr;
4386         file_info->Pad1 = 0;
4387         file_info->AllocationSize =
4388                 cpu_to_le64(get_allocation_size(inode, &stat));
4389         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4390         file_info->NumberOfLinks =
4391                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4392         file_info->DeletePending = delete_pending;
4393         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4394         file_info->Pad2 = 0;
4395         file_info->IndexNumber = cpu_to_le64(stat.ino);
4396         file_info->EASize = 0;
4397         file_info->AccessFlags = fp->daccess;
4398         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4399         file_info->Mode = fp->coption;
4400         file_info->AlignmentRequirement = 0;
4401         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4402                                      PATH_MAX, conn->local_nls, 0);
4403         conv_len *= 2;
4404         file_info->FileNameLength = cpu_to_le32(conv_len);
4405         rsp->OutputBufferLength =
4406                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4407         kfree(filename);
4408         inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4409         return 0;
4410 }
4411
4412 static void get_file_alternate_info(struct ksmbd_work *work,
4413                                     struct smb2_query_info_rsp *rsp,
4414                                     struct ksmbd_file *fp,
4415                                     void *rsp_org)
4416 {
4417         struct ksmbd_conn *conn = work->conn;
4418         struct smb2_file_alt_name_info *file_info;
4419         struct dentry *dentry = fp->filp->f_path.dentry;
4420         int conv_len;
4421
4422         spin_lock(&dentry->d_lock);
4423         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4424         conv_len = ksmbd_extract_shortname(conn,
4425                                            dentry->d_name.name,
4426                                            file_info->FileName);
4427         spin_unlock(&dentry->d_lock);
4428         file_info->FileNameLength = cpu_to_le32(conv_len);
4429         rsp->OutputBufferLength =
4430                 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4431         inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4432 }
4433
4434 static void get_file_stream_info(struct ksmbd_work *work,
4435                                  struct smb2_query_info_rsp *rsp,
4436                                  struct ksmbd_file *fp,
4437                                  void *rsp_org)
4438 {
4439         struct ksmbd_conn *conn = work->conn;
4440         struct smb2_file_stream_info *file_info;
4441         char *stream_name, *xattr_list = NULL, *stream_buf;
4442         struct kstat stat;
4443         struct path *path = &fp->filp->f_path;
4444         ssize_t xattr_list_len;
4445         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4446         int buf_free_len;
4447         struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4448
4449         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4450                          &stat);
4451         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4452
4453         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4454         if (xattr_list_len < 0) {
4455                 goto out;
4456         } else if (!xattr_list_len) {
4457                 ksmbd_debug(SMB, "empty xattr in the file\n");
4458                 goto out;
4459         }
4460
4461         buf_free_len =
4462                 smb2_calc_max_out_buf_len(work, 8,
4463                                           le32_to_cpu(req->OutputBufferLength));
4464         if (buf_free_len < 0)
4465                 goto out;
4466
4467         while (idx < xattr_list_len) {
4468                 stream_name = xattr_list + idx;
4469                 streamlen = strlen(stream_name);
4470                 idx += streamlen + 1;
4471
4472                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4473
4474                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4475                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4476                         continue;
4477
4478                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4479                                 STREAM_PREFIX_LEN);
4480                 streamlen = stream_name_len;
4481
4482                 /* plus : size */
4483                 streamlen += 1;
4484                 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4485                 if (!stream_buf)
4486                         break;
4487
4488                 streamlen = snprintf(stream_buf, streamlen + 1,
4489                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4490
4491                 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4492                 if (next > buf_free_len)
4493                         break;
4494
4495                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4496                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4497                                                stream_buf, streamlen,
4498                                                conn->local_nls, 0);
4499                 streamlen *= 2;
4500                 kfree(stream_buf);
4501                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4502                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4503                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4504
4505                 nbytes += next;
4506                 buf_free_len -= next;
4507                 file_info->NextEntryOffset = cpu_to_le32(next);
4508         }
4509
4510         if (!S_ISDIR(stat.mode) &&
4511             buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4512                 file_info = (struct smb2_file_stream_info *)
4513                         &rsp->Buffer[nbytes];
4514                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4515                                               "::$DATA", 7, conn->local_nls, 0);
4516                 streamlen *= 2;
4517                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4518                 file_info->StreamSize = 0;
4519                 file_info->StreamAllocationSize = 0;
4520                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4521         }
4522
4523         /* last entry offset should be 0 */
4524         file_info->NextEntryOffset = 0;
4525 out:
4526         kvfree(xattr_list);
4527
4528         rsp->OutputBufferLength = cpu_to_le32(nbytes);
4529         inc_rfc1001_len(rsp_org, nbytes);
4530 }
4531
4532 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4533                                    struct ksmbd_file *fp, void *rsp_org)
4534 {
4535         struct smb2_file_internal_info *file_info;
4536         struct kstat stat;
4537
4538         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4539                          &stat);
4540         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4541         file_info->IndexNumber = cpu_to_le64(stat.ino);
4542         rsp->OutputBufferLength =
4543                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4544         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4545 }
4546
4547 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4548                                       struct ksmbd_file *fp, void *rsp_org)
4549 {
4550         struct smb2_file_ntwrk_info *file_info;
4551         struct inode *inode;
4552         struct kstat stat;
4553         u64 time;
4554
4555         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4556                 pr_err("no right to read the attributes : 0x%x\n",
4557                        fp->daccess);
4558                 return -EACCES;
4559         }
4560
4561         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4562
4563         inode = file_inode(fp->filp);
4564         generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4565
4566         file_info->CreationTime = cpu_to_le64(fp->create_time);
4567         time = ksmbd_UnixTimeToNT(stat.atime);
4568         file_info->LastAccessTime = cpu_to_le64(time);
4569         time = ksmbd_UnixTimeToNT(stat.mtime);
4570         file_info->LastWriteTime = cpu_to_le64(time);
4571         time = ksmbd_UnixTimeToNT(stat.ctime);
4572         file_info->ChangeTime = cpu_to_le64(time);
4573         file_info->Attributes = fp->f_ci->m_fattr;
4574         file_info->AllocationSize =
4575                 cpu_to_le64(get_allocation_size(inode, &stat));
4576         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4577         file_info->Reserved = cpu_to_le32(0);
4578         rsp->OutputBufferLength =
4579                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4580         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info));
4581         return 0;
4582 }
4583
4584 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4585 {
4586         struct smb2_file_ea_info *file_info;
4587
4588         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4589         file_info->EASize = 0;
4590         rsp->OutputBufferLength =
4591                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4592         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info));
4593 }
4594
4595 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4596                                    struct ksmbd_file *fp, void *rsp_org)
4597 {
4598         struct smb2_file_pos_info *file_info;
4599
4600         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4601         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4602         rsp->OutputBufferLength =
4603                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4604         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info));
4605 }
4606
4607 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4608                                struct ksmbd_file *fp, void *rsp_org)
4609 {
4610         struct smb2_file_mode_info *file_info;
4611
4612         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4613         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4614         rsp->OutputBufferLength =
4615                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4616         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info));
4617 }
4618
4619 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4620                                       struct ksmbd_file *fp, void *rsp_org)
4621 {
4622         struct smb2_file_comp_info *file_info;
4623         struct kstat stat;
4624
4625         generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4626                          &stat);
4627
4628         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4629         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4630         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4631         file_info->CompressionUnitShift = 0;
4632         file_info->ChunkShift = 0;
4633         file_info->ClusterShift = 0;
4634         memset(&file_info->Reserved[0], 0, 3);
4635
4636         rsp->OutputBufferLength =
4637                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4638         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info));
4639 }
4640
4641 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4642                                        struct ksmbd_file *fp, void *rsp_org)
4643 {
4644         struct smb2_file_attr_tag_info *file_info;
4645
4646         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4647                 pr_err("no right to read the attributes : 0x%x\n",
4648                        fp->daccess);
4649                 return -EACCES;
4650         }
4651
4652         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4653         file_info->FileAttributes = fp->f_ci->m_fattr;
4654         file_info->ReparseTag = 0;
4655         rsp->OutputBufferLength =
4656                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4657         inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info));
4658         return 0;
4659 }
4660
4661 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
4662                                 struct ksmbd_file *fp, void *rsp_org)
4663 {
4664         struct smb311_posix_qinfo *file_info;
4665         struct inode *inode = file_inode(fp->filp);
4666         u64 time;
4667
4668         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4669         file_info->CreationTime = cpu_to_le64(fp->create_time);
4670         time = ksmbd_UnixTimeToNT(inode->i_atime);
4671         file_info->LastAccessTime = cpu_to_le64(time);
4672         time = ksmbd_UnixTimeToNT(inode->i_mtime);
4673         file_info->LastWriteTime = cpu_to_le64(time);
4674         time = ksmbd_UnixTimeToNT(inode->i_ctime);
4675         file_info->ChangeTime = cpu_to_le64(time);
4676         file_info->DosAttributes = fp->f_ci->m_fattr;
4677         file_info->Inode = cpu_to_le64(inode->i_ino);
4678         file_info->EndOfFile = cpu_to_le64(inode->i_size);
4679         file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4680         file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4681         file_info->Mode = cpu_to_le32(inode->i_mode);
4682         file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4683         rsp->OutputBufferLength =
4684                 cpu_to_le32(sizeof(struct smb311_posix_qinfo));
4685         inc_rfc1001_len(rsp_org, sizeof(struct smb311_posix_qinfo));
4686         return 0;
4687 }
4688
4689 static int smb2_get_info_file(struct ksmbd_work *work,
4690                               struct smb2_query_info_req *req,
4691                               struct smb2_query_info_rsp *rsp, void *rsp_org)
4692 {
4693         struct ksmbd_file *fp;
4694         int fileinfoclass = 0;
4695         int rc = 0;
4696         int file_infoclass_size;
4697         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4698
4699         if (test_share_config_flag(work->tcon->share_conf,
4700                                    KSMBD_SHARE_FLAG_PIPE)) {
4701                 /* smb2 info file called for pipe */
4702                 return smb2_get_info_file_pipe(work->sess, req, rsp);
4703         }
4704
4705         if (work->next_smb2_rcv_hdr_off) {
4706                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
4707                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4708                                     work->compound_fid);
4709                         id = work->compound_fid;
4710                         pid = work->compound_pfid;
4711                 }
4712         }
4713
4714         if (!has_file_id(id)) {
4715                 id = le64_to_cpu(req->VolatileFileId);
4716                 pid = le64_to_cpu(req->PersistentFileId);
4717         }
4718
4719         fp = ksmbd_lookup_fd_slow(work, id, pid);
4720         if (!fp)
4721                 return -ENOENT;
4722
4723         fileinfoclass = req->FileInfoClass;
4724
4725         switch (fileinfoclass) {
4726         case FILE_ACCESS_INFORMATION:
4727                 get_file_access_info(rsp, fp, rsp_org);
4728                 file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE;
4729                 break;
4730
4731         case FILE_BASIC_INFORMATION:
4732                 rc = get_file_basic_info(rsp, fp, rsp_org);
4733                 file_infoclass_size = FILE_BASIC_INFORMATION_SIZE;
4734                 break;
4735
4736         case FILE_STANDARD_INFORMATION:
4737                 get_file_standard_info(rsp, fp, rsp_org);
4738                 file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE;
4739                 break;
4740
4741         case FILE_ALIGNMENT_INFORMATION:
4742                 get_file_alignment_info(rsp, rsp_org);
4743                 file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE;
4744                 break;
4745
4746         case FILE_ALL_INFORMATION:
4747                 rc = get_file_all_info(work, rsp, fp, rsp_org);
4748                 file_infoclass_size = FILE_ALL_INFORMATION_SIZE;
4749                 break;
4750
4751         case FILE_ALTERNATE_NAME_INFORMATION:
4752                 get_file_alternate_info(work, rsp, fp, rsp_org);
4753                 file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE;
4754                 break;
4755
4756         case FILE_STREAM_INFORMATION:
4757                 get_file_stream_info(work, rsp, fp, rsp_org);
4758                 file_infoclass_size = FILE_STREAM_INFORMATION_SIZE;
4759                 break;
4760
4761         case FILE_INTERNAL_INFORMATION:
4762                 get_file_internal_info(rsp, fp, rsp_org);
4763                 file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE;
4764                 break;
4765
4766         case FILE_NETWORK_OPEN_INFORMATION:
4767                 rc = get_file_network_open_info(rsp, fp, rsp_org);
4768                 file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE;
4769                 break;
4770
4771         case FILE_EA_INFORMATION:
4772                 get_file_ea_info(rsp, rsp_org);
4773                 file_infoclass_size = FILE_EA_INFORMATION_SIZE;
4774                 break;
4775
4776         case FILE_FULL_EA_INFORMATION:
4777                 rc = smb2_get_ea(work, fp, req, rsp, rsp_org);
4778                 file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE;
4779                 break;
4780
4781         case FILE_POSITION_INFORMATION:
4782                 get_file_position_info(rsp, fp, rsp_org);
4783                 file_infoclass_size = FILE_POSITION_INFORMATION_SIZE;
4784                 break;
4785
4786         case FILE_MODE_INFORMATION:
4787                 get_file_mode_info(rsp, fp, rsp_org);
4788                 file_infoclass_size = FILE_MODE_INFORMATION_SIZE;
4789                 break;
4790
4791         case FILE_COMPRESSION_INFORMATION:
4792                 get_file_compression_info(rsp, fp, rsp_org);
4793                 file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE;
4794                 break;
4795
4796         case FILE_ATTRIBUTE_TAG_INFORMATION:
4797                 rc = get_file_attribute_tag_info(rsp, fp, rsp_org);
4798                 file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE;
4799                 break;
4800         case SMB_FIND_FILE_POSIX_INFO:
4801                 if (!work->tcon->posix_extensions) {
4802                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4803                         rc = -EOPNOTSUPP;
4804                 } else {
4805                         rc = find_file_posix_info(rsp, fp, rsp_org);
4806                         file_infoclass_size = sizeof(struct smb311_posix_qinfo);
4807                 }
4808                 break;
4809         default:
4810                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4811                             fileinfoclass);
4812                 rc = -EOPNOTSUPP;
4813         }
4814         if (!rc)
4815                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4816                                       rsp,
4817                                       file_infoclass_size);
4818         ksmbd_fd_put(work, fp);
4819         return rc;
4820 }
4821
4822 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4823                                     struct smb2_query_info_req *req,
4824                                     struct smb2_query_info_rsp *rsp, void *rsp_org)
4825 {
4826         struct ksmbd_session *sess = work->sess;
4827         struct ksmbd_conn *conn = sess->conn;
4828         struct ksmbd_share_config *share = work->tcon->share_conf;
4829         int fsinfoclass = 0;
4830         struct kstatfs stfs;
4831         struct path path;
4832         int rc = 0, len;
4833         int fs_infoclass_size = 0;
4834
4835         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
4836         if (rc) {
4837                 pr_err("cannot create vfs path\n");
4838                 return -EIO;
4839         }
4840
4841         rc = vfs_statfs(&path, &stfs);
4842         if (rc) {
4843                 pr_err("cannot do stat of path %s\n", share->path);
4844                 path_put(&path);
4845                 return -EIO;
4846         }
4847
4848         fsinfoclass = req->FileInfoClass;
4849
4850         switch (fsinfoclass) {
4851         case FS_DEVICE_INFORMATION:
4852         {
4853                 struct filesystem_device_info *info;
4854
4855                 info = (struct filesystem_device_info *)rsp->Buffer;
4856
4857                 info->DeviceType = cpu_to_le32(stfs.f_type);
4858                 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
4859                 rsp->OutputBufferLength = cpu_to_le32(8);
4860                 inc_rfc1001_len(rsp_org, 8);
4861                 fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE;
4862                 break;
4863         }
4864         case FS_ATTRIBUTE_INFORMATION:
4865         {
4866                 struct filesystem_attribute_info *info;
4867                 size_t sz;
4868
4869                 info = (struct filesystem_attribute_info *)rsp->Buffer;
4870                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
4871                                                FILE_PERSISTENT_ACLS |
4872                                                FILE_UNICODE_ON_DISK |
4873                                                FILE_CASE_PRESERVED_NAMES |
4874                                                FILE_CASE_SENSITIVE_SEARCH |
4875                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
4876
4877                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
4878
4879                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
4880                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
4881                                         "NTFS", PATH_MAX, conn->local_nls, 0);
4882                 len = len * 2;
4883                 info->FileSystemNameLen = cpu_to_le32(len);
4884                 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
4885                 rsp->OutputBufferLength = cpu_to_le32(sz);
4886                 inc_rfc1001_len(rsp_org, sz);
4887                 fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE;
4888                 break;
4889         }
4890         case FS_VOLUME_INFORMATION:
4891         {
4892                 struct filesystem_vol_info *info;
4893                 size_t sz;
4894
4895                 info = (struct filesystem_vol_info *)(rsp->Buffer);
4896                 info->VolumeCreationTime = 0;
4897                 /* Taking dummy value of serial number*/
4898                 info->SerialNumber = cpu_to_le32(0xbc3ac512);
4899                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
4900                                         share->name, PATH_MAX,
4901                                         conn->local_nls, 0);
4902                 len = len * 2;
4903                 info->VolumeLabelSize = cpu_to_le32(len);
4904                 info->Reserved = 0;
4905                 sz = sizeof(struct filesystem_vol_info) - 2 + len;
4906                 rsp->OutputBufferLength = cpu_to_le32(sz);
4907                 inc_rfc1001_len(rsp_org, sz);
4908                 fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE;
4909                 break;
4910         }
4911         case FS_SIZE_INFORMATION:
4912         {
4913                 struct filesystem_info *info;
4914
4915                 info = (struct filesystem_info *)(rsp->Buffer);
4916                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4917                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
4918                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
4919                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
4920                 rsp->OutputBufferLength = cpu_to_le32(24);
4921                 inc_rfc1001_len(rsp_org, 24);
4922                 fs_infoclass_size = FS_SIZE_INFORMATION_SIZE;
4923                 break;
4924         }
4925         case FS_FULL_SIZE_INFORMATION:
4926         {
4927                 struct smb2_fs_full_size_info *info;
4928
4929                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
4930                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4931                 info->CallerAvailableAllocationUnits =
4932                                         cpu_to_le64(stfs.f_bavail);
4933                 info->ActualAvailableAllocationUnits =
4934                                         cpu_to_le64(stfs.f_bfree);
4935                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
4936                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
4937                 rsp->OutputBufferLength = cpu_to_le32(32);
4938                 inc_rfc1001_len(rsp_org, 32);
4939                 fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE;
4940                 break;
4941         }
4942         case FS_OBJECT_ID_INFORMATION:
4943         {
4944                 struct object_id_info *info;
4945
4946                 info = (struct object_id_info *)(rsp->Buffer);
4947
4948                 if (!user_guest(sess->user))
4949                         memcpy(info->objid, user_passkey(sess->user), 16);
4950                 else
4951                         memset(info->objid, 0, 16);
4952
4953                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
4954                 info->extended_info.version = cpu_to_le32(1);
4955                 info->extended_info.release = cpu_to_le32(1);
4956                 info->extended_info.rel_date = 0;
4957                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
4958                 rsp->OutputBufferLength = cpu_to_le32(64);
4959                 inc_rfc1001_len(rsp_org, 64);
4960                 fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE;
4961                 break;
4962         }
4963         case FS_SECTOR_SIZE_INFORMATION:
4964         {
4965                 struct smb3_fs_ss_info *info;
4966
4967                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
4968
4969                 info->LogicalBytesPerSector = cpu_to_le32(stfs.f_bsize);
4970                 info->PhysicalBytesPerSectorForAtomicity =
4971                                 cpu_to_le32(stfs.f_bsize);
4972                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(stfs.f_bsize);
4973                 info->FSEffPhysicalBytesPerSectorForAtomicity =
4974                                 cpu_to_le32(stfs.f_bsize);
4975                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
4976                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
4977                 info->ByteOffsetForSectorAlignment = 0;
4978                 info->ByteOffsetForPartitionAlignment = 0;
4979                 rsp->OutputBufferLength = cpu_to_le32(28);
4980                 inc_rfc1001_len(rsp_org, 28);
4981                 fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE;
4982                 break;
4983         }
4984         case FS_CONTROL_INFORMATION:
4985         {
4986                 /*
4987                  * TODO : The current implementation is based on
4988                  * test result with win7(NTFS) server. It's need to
4989                  * modify this to get valid Quota values
4990                  * from Linux kernel
4991                  */
4992                 struct smb2_fs_control_info *info;
4993
4994                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
4995                 info->FreeSpaceStartFiltering = 0;
4996                 info->FreeSpaceThreshold = 0;
4997                 info->FreeSpaceStopFiltering = 0;
4998                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
4999                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5000                 info->Padding = 0;
5001                 rsp->OutputBufferLength = cpu_to_le32(48);
5002                 inc_rfc1001_len(rsp_org, 48);
5003                 fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE;
5004                 break;
5005         }
5006         case FS_POSIX_INFORMATION:
5007         {
5008                 struct filesystem_posix_info *info;
5009
5010                 if (!work->tcon->posix_extensions) {
5011                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5012                         rc = -EOPNOTSUPP;
5013                 } else {
5014                         info = (struct filesystem_posix_info *)(rsp->Buffer);
5015                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5016                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
5017                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5018                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5019                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5020                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5021                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5022                         rsp->OutputBufferLength = cpu_to_le32(56);
5023                         inc_rfc1001_len(rsp_org, 56);
5024                         fs_infoclass_size = FS_POSIX_INFORMATION_SIZE;
5025                 }
5026                 break;
5027         }
5028         default:
5029                 path_put(&path);
5030                 return -EOPNOTSUPP;
5031         }
5032         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5033                               rsp,
5034                               fs_infoclass_size);
5035         path_put(&path);
5036         return rc;
5037 }
5038
5039 static int smb2_get_info_sec(struct ksmbd_work *work,
5040                              struct smb2_query_info_req *req,
5041                              struct smb2_query_info_rsp *rsp, void *rsp_org)
5042 {
5043         struct ksmbd_file *fp;
5044         struct user_namespace *user_ns;
5045         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5046         struct smb_fattr fattr = {{0}};
5047         struct inode *inode;
5048         __u32 secdesclen;
5049         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5050         int addition_info = le32_to_cpu(req->AdditionalInformation);
5051         int rc;
5052
5053         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5054                               PROTECTED_DACL_SECINFO |
5055                               UNPROTECTED_DACL_SECINFO)) {
5056                 pr_err("Unsupported addition info: 0x%x)\n",
5057                        addition_info);
5058
5059                 pntsd->revision = cpu_to_le16(1);
5060                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5061                 pntsd->osidoffset = 0;
5062                 pntsd->gsidoffset = 0;
5063                 pntsd->sacloffset = 0;
5064                 pntsd->dacloffset = 0;
5065
5066                 secdesclen = sizeof(struct smb_ntsd);
5067                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5068                 inc_rfc1001_len(rsp_org, secdesclen);
5069
5070                 return 0;
5071         }
5072
5073         if (work->next_smb2_rcv_hdr_off) {
5074                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
5075                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5076                                     work->compound_fid);
5077                         id = work->compound_fid;
5078                         pid = work->compound_pfid;
5079                 }
5080         }
5081
5082         if (!has_file_id(id)) {
5083                 id = le64_to_cpu(req->VolatileFileId);
5084                 pid = le64_to_cpu(req->PersistentFileId);
5085         }
5086
5087         fp = ksmbd_lookup_fd_slow(work, id, pid);
5088         if (!fp)
5089                 return -ENOENT;
5090
5091         user_ns = file_mnt_user_ns(fp->filp);
5092         inode = file_inode(fp->filp);
5093         ksmbd_acls_fattr(&fattr, user_ns, inode);
5094
5095         if (test_share_config_flag(work->tcon->share_conf,
5096                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5097                 ksmbd_vfs_get_sd_xattr(work->conn, user_ns,
5098                                        fp->filp->f_path.dentry, &ppntsd);
5099
5100         rc = build_sec_desc(user_ns, pntsd, ppntsd, addition_info,
5101                             &secdesclen, &fattr);
5102         posix_acl_release(fattr.cf_acls);
5103         posix_acl_release(fattr.cf_dacls);
5104         kfree(ppntsd);
5105         ksmbd_fd_put(work, fp);
5106         if (rc)
5107                 return rc;
5108
5109         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5110         inc_rfc1001_len(rsp_org, secdesclen);
5111         return 0;
5112 }
5113
5114 /**
5115  * smb2_query_info() - handler for smb2 query info command
5116  * @work:       smb work containing query info request buffer
5117  *
5118  * Return:      0 on success, otherwise error
5119  */
5120 int smb2_query_info(struct ksmbd_work *work)
5121 {
5122         struct smb2_query_info_req *req;
5123         struct smb2_query_info_rsp *rsp, *rsp_org;
5124         int rc = 0;
5125
5126         rsp_org = work->response_buf;
5127         WORK_BUFFERS(work, req, rsp);
5128
5129         ksmbd_debug(SMB, "GOT query info request\n");
5130
5131         switch (req->InfoType) {
5132         case SMB2_O_INFO_FILE:
5133                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5134                 rc = smb2_get_info_file(work, req, rsp, (void *)rsp_org);
5135                 break;
5136         case SMB2_O_INFO_FILESYSTEM:
5137                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5138                 rc = smb2_get_info_filesystem(work, req, rsp, (void *)rsp_org);
5139                 break;
5140         case SMB2_O_INFO_SECURITY:
5141                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5142                 rc = smb2_get_info_sec(work, req, rsp, (void *)rsp_org);
5143                 break;
5144         default:
5145                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5146                             req->InfoType);
5147                 rc = -EOPNOTSUPP;
5148         }
5149
5150         if (rc < 0) {
5151                 if (rc == -EACCES)
5152                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5153                 else if (rc == -ENOENT)
5154                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5155                 else if (rc == -EIO)
5156                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5157                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5158                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5159                 smb2_set_err_rsp(work);
5160
5161                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5162                             rc);
5163                 return rc;
5164         }
5165         rsp->StructureSize = cpu_to_le16(9);
5166         rsp->OutputBufferOffset = cpu_to_le16(72);
5167         inc_rfc1001_len(rsp_org, 8);
5168         return 0;
5169 }
5170
5171 /**
5172  * smb2_close_pipe() - handler for closing IPC pipe
5173  * @work:       smb work containing close request buffer
5174  *
5175  * Return:      0
5176  */
5177 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5178 {
5179         u64 id;
5180         struct smb2_close_req *req = work->request_buf;
5181         struct smb2_close_rsp *rsp = work->response_buf;
5182
5183         id = le64_to_cpu(req->VolatileFileId);
5184         ksmbd_session_rpc_close(work->sess, id);
5185
5186         rsp->StructureSize = cpu_to_le16(60);
5187         rsp->Flags = 0;
5188         rsp->Reserved = 0;
5189         rsp->CreationTime = 0;
5190         rsp->LastAccessTime = 0;
5191         rsp->LastWriteTime = 0;
5192         rsp->ChangeTime = 0;
5193         rsp->AllocationSize = 0;
5194         rsp->EndOfFile = 0;
5195         rsp->Attributes = 0;
5196         inc_rfc1001_len(rsp, 60);
5197         return 0;
5198 }
5199
5200 /**
5201  * smb2_close() - handler for smb2 close file command
5202  * @work:       smb work containing close request buffer
5203  *
5204  * Return:      0
5205  */
5206 int smb2_close(struct ksmbd_work *work)
5207 {
5208         u64 volatile_id = KSMBD_NO_FID;
5209         u64 sess_id;
5210         struct smb2_close_req *req;
5211         struct smb2_close_rsp *rsp;
5212         struct smb2_close_rsp *rsp_org;
5213         struct ksmbd_conn *conn = work->conn;
5214         struct ksmbd_file *fp;
5215         struct inode *inode;
5216         u64 time;
5217         int err = 0;
5218
5219         rsp_org = work->response_buf;
5220         WORK_BUFFERS(work, req, rsp);
5221
5222         if (test_share_config_flag(work->tcon->share_conf,
5223                                    KSMBD_SHARE_FLAG_PIPE)) {
5224                 ksmbd_debug(SMB, "IPC pipe close request\n");
5225                 return smb2_close_pipe(work);
5226         }
5227
5228         sess_id = le64_to_cpu(req->hdr.SessionId);
5229         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5230                 sess_id = work->compound_sid;
5231
5232         work->compound_sid = 0;
5233         if (check_session_id(conn, sess_id)) {
5234                 work->compound_sid = sess_id;
5235         } else {
5236                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5237                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5238                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5239                 err = -EBADF;
5240                 goto out;
5241         }
5242
5243         if (work->next_smb2_rcv_hdr_off &&
5244             !has_file_id(le64_to_cpu(req->VolatileFileId))) {
5245                 if (!has_file_id(work->compound_fid)) {
5246                         /* file already closed, return FILE_CLOSED */
5247                         ksmbd_debug(SMB, "file already closed\n");
5248                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5249                         err = -EBADF;
5250                         goto out;
5251                 } else {
5252                         ksmbd_debug(SMB,
5253                                     "Compound request set FID = %llu:%llu\n",
5254                                     work->compound_fid,
5255                                     work->compound_pfid);
5256                         volatile_id = work->compound_fid;
5257
5258                         /* file closed, stored id is not valid anymore */
5259                         work->compound_fid = KSMBD_NO_FID;
5260                         work->compound_pfid = KSMBD_NO_FID;
5261                 }
5262         } else {
5263                 volatile_id = le64_to_cpu(req->VolatileFileId);
5264         }
5265         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5266
5267         rsp->StructureSize = cpu_to_le16(60);
5268         rsp->Reserved = 0;
5269
5270         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5271                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5272                 if (!fp) {
5273                         err = -ENOENT;
5274                         goto out;
5275                 }
5276
5277                 inode = file_inode(fp->filp);
5278                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5279                 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5280                         cpu_to_le64(inode->i_blocks << 9);
5281                 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5282                 rsp->Attributes = fp->f_ci->m_fattr;
5283                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5284                 time = ksmbd_UnixTimeToNT(inode->i_atime);
5285                 rsp->LastAccessTime = cpu_to_le64(time);
5286                 time = ksmbd_UnixTimeToNT(inode->i_mtime);
5287                 rsp->LastWriteTime = cpu_to_le64(time);
5288                 time = ksmbd_UnixTimeToNT(inode->i_ctime);
5289                 rsp->ChangeTime = cpu_to_le64(time);
5290                 ksmbd_fd_put(work, fp);
5291         } else {
5292                 rsp->Flags = 0;
5293                 rsp->AllocationSize = 0;
5294                 rsp->EndOfFile = 0;
5295                 rsp->Attributes = 0;
5296                 rsp->CreationTime = 0;
5297                 rsp->LastAccessTime = 0;
5298                 rsp->LastWriteTime = 0;
5299                 rsp->ChangeTime = 0;
5300         }
5301
5302         err = ksmbd_close_fd(work, volatile_id);
5303 out:
5304         if (err) {
5305                 if (rsp->hdr.Status == 0)
5306                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5307                 smb2_set_err_rsp(work);
5308         } else {
5309                 inc_rfc1001_len(rsp_org, 60);
5310         }
5311
5312         return 0;
5313 }
5314
5315 /**
5316  * smb2_echo() - handler for smb2 echo(ping) command
5317  * @work:       smb work containing echo request buffer
5318  *
5319  * Return:      0
5320  */
5321 int smb2_echo(struct ksmbd_work *work)
5322 {
5323         struct smb2_echo_rsp *rsp = work->response_buf;
5324
5325         rsp->StructureSize = cpu_to_le16(4);
5326         rsp->Reserved = 0;
5327         inc_rfc1001_len(rsp, 4);
5328         return 0;
5329 }
5330
5331 static int smb2_rename(struct ksmbd_work *work,
5332                        struct ksmbd_file *fp,
5333                        struct user_namespace *user_ns,
5334                        struct smb2_file_rename_info *file_info,
5335                        struct nls_table *local_nls)
5336 {
5337         struct ksmbd_share_config *share = fp->tcon->share_conf;
5338         char *new_name = NULL, *abs_oldname = NULL, *old_name = NULL;
5339         char *pathname = NULL;
5340         struct path path;
5341         bool file_present = true;
5342         int rc;
5343
5344         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5345         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5346         if (!pathname)
5347                 return -ENOMEM;
5348
5349         abs_oldname = d_path(&fp->filp->f_path, pathname, PATH_MAX);
5350         if (IS_ERR(abs_oldname)) {
5351                 rc = -EINVAL;
5352                 goto out;
5353         }
5354         old_name = strrchr(abs_oldname, '/');
5355         if (old_name && old_name[1] != '\0') {
5356                 old_name++;
5357         } else {
5358                 ksmbd_debug(SMB, "can't get last component in path %s\n",
5359                             abs_oldname);
5360                 rc = -ENOENT;
5361                 goto out;
5362         }
5363
5364         new_name = smb2_get_name(share,
5365                                  file_info->FileName,
5366                                  le32_to_cpu(file_info->FileNameLength),
5367                                  local_nls);
5368         if (IS_ERR(new_name)) {
5369                 rc = PTR_ERR(new_name);
5370                 goto out;
5371         }
5372
5373         if (strchr(new_name, ':')) {
5374                 int s_type;
5375                 char *xattr_stream_name, *stream_name = NULL;
5376                 size_t xattr_stream_size;
5377                 int len;
5378
5379                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5380                 if (rc < 0)
5381                         goto out;
5382
5383                 len = strlen(new_name);
5384                 if (len > 0 && new_name[len - 1] != '/') {
5385                         pr_err("not allow base filename in rename\n");
5386                         rc = -ESHARE;
5387                         goto out;
5388                 }
5389
5390                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5391                                                  &xattr_stream_name,
5392                                                  &xattr_stream_size,
5393                                                  s_type);
5394                 if (rc)
5395                         goto out;
5396
5397                 rc = ksmbd_vfs_setxattr(user_ns,
5398                                         fp->filp->f_path.dentry,
5399                                         xattr_stream_name,
5400                                         NULL, 0, 0);
5401                 if (rc < 0) {
5402                         pr_err("failed to store stream name in xattr: %d\n",
5403                                rc);
5404                         rc = -EINVAL;
5405                         goto out;
5406                 }
5407
5408                 goto out;
5409         }
5410
5411         ksmbd_debug(SMB, "new name %s\n", new_name);
5412         rc = ksmbd_vfs_kern_path(work, new_name, LOOKUP_NO_SYMLINKS, &path, 1);
5413         if (rc) {
5414                 if (rc != -ENOENT)
5415                         goto out;
5416                 file_present = false;
5417         } else {
5418                 path_put(&path);
5419         }
5420
5421         if (ksmbd_share_veto_filename(share, new_name)) {
5422                 rc = -ENOENT;
5423                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5424                 goto out;
5425         }
5426
5427         if (file_info->ReplaceIfExists) {
5428                 if (file_present) {
5429                         rc = ksmbd_vfs_remove_file(work, new_name);
5430                         if (rc) {
5431                                 if (rc != -ENOTEMPTY)
5432                                         rc = -EINVAL;
5433                                 ksmbd_debug(SMB, "cannot delete %s, rc %d\n",
5434                                             new_name, rc);
5435                                 goto out;
5436                         }
5437                 }
5438         } else {
5439                 if (file_present &&
5440                     strncmp(old_name, path.dentry->d_name.name, strlen(old_name))) {
5441                         rc = -EEXIST;
5442                         ksmbd_debug(SMB,
5443                                     "cannot rename already existing file\n");
5444                         goto out;
5445                 }
5446         }
5447
5448         rc = ksmbd_vfs_fp_rename(work, fp, new_name);
5449 out:
5450         kfree(pathname);
5451         if (!IS_ERR(new_name))
5452                 kfree(new_name);
5453         return rc;
5454 }
5455
5456 static int smb2_create_link(struct ksmbd_work *work,
5457                             struct ksmbd_share_config *share,
5458                             struct smb2_file_link_info *file_info,
5459                             unsigned int buf_len, struct file *filp,
5460                             struct nls_table *local_nls)
5461 {
5462         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5463         struct path path;
5464         bool file_present = true;
5465         int rc;
5466
5467         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5468                         le32_to_cpu(file_info->FileNameLength))
5469                 return -EINVAL;
5470
5471         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5472         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5473         if (!pathname)
5474                 return -ENOMEM;
5475
5476         link_name = smb2_get_name(share,
5477                                   file_info->FileName,
5478                                   le32_to_cpu(file_info->FileNameLength),
5479                                   local_nls);
5480         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5481                 rc = -EINVAL;
5482                 goto out;
5483         }
5484
5485         ksmbd_debug(SMB, "link name is %s\n", link_name);
5486         target_name = d_path(&filp->f_path, pathname, PATH_MAX);
5487         if (IS_ERR(target_name)) {
5488                 rc = -EINVAL;
5489                 goto out;
5490         }
5491
5492         ksmbd_debug(SMB, "target name is %s\n", target_name);
5493         rc = ksmbd_vfs_kern_path(work, link_name, LOOKUP_NO_SYMLINKS, &path, 0);
5494         if (rc) {
5495                 if (rc != -ENOENT)
5496                         goto out;
5497                 file_present = false;
5498         } else {
5499                 path_put(&path);
5500         }
5501
5502         if (file_info->ReplaceIfExists) {
5503                 if (file_present) {
5504                         rc = ksmbd_vfs_remove_file(work, link_name);
5505                         if (rc) {
5506                                 rc = -EINVAL;
5507                                 ksmbd_debug(SMB, "cannot delete %s\n",
5508                                             link_name);
5509                                 goto out;
5510                         }
5511                 }
5512         } else {
5513                 if (file_present) {
5514                         rc = -EEXIST;
5515                         ksmbd_debug(SMB, "link already exists\n");
5516                         goto out;
5517                 }
5518         }
5519
5520         rc = ksmbd_vfs_link(work, target_name, link_name);
5521         if (rc)
5522                 rc = -EINVAL;
5523 out:
5524         if (!IS_ERR(link_name))
5525                 kfree(link_name);
5526         kfree(pathname);
5527         return rc;
5528 }
5529
5530 static int set_file_basic_info(struct ksmbd_file *fp,
5531                                struct smb2_file_basic_info *file_info,
5532                                struct ksmbd_share_config *share)
5533 {
5534         struct iattr attrs;
5535         struct file *filp;
5536         struct inode *inode;
5537         struct user_namespace *user_ns;
5538         int rc = 0;
5539
5540         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5541                 return -EACCES;
5542
5543         attrs.ia_valid = 0;
5544         filp = fp->filp;
5545         inode = file_inode(filp);
5546         user_ns = file_mnt_user_ns(filp);
5547
5548         if (file_info->CreationTime)
5549                 fp->create_time = le64_to_cpu(file_info->CreationTime);
5550
5551         if (file_info->LastAccessTime) {
5552                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5553                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5554         }
5555
5556         attrs.ia_valid |= ATTR_CTIME;
5557         if (file_info->ChangeTime)
5558                 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5559         else
5560                 attrs.ia_ctime = inode->i_ctime;
5561
5562         if (file_info->LastWriteTime) {
5563                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5564                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5565         }
5566
5567         if (file_info->Attributes) {
5568                 if (!S_ISDIR(inode->i_mode) &&
5569                     file_info->Attributes & ATTR_DIRECTORY_LE) {
5570                         pr_err("can't change a file to a directory\n");
5571                         return -EINVAL;
5572                 }
5573
5574                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == ATTR_NORMAL_LE))
5575                         fp->f_ci->m_fattr = file_info->Attributes |
5576                                 (fp->f_ci->m_fattr & ATTR_DIRECTORY_LE);
5577         }
5578
5579         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5580             (file_info->CreationTime || file_info->Attributes)) {
5581                 struct xattr_dos_attrib da = {0};
5582
5583                 da.version = 4;
5584                 da.itime = fp->itime;
5585                 da.create_time = fp->create_time;
5586                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5587                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5588                         XATTR_DOSINFO_ITIME;
5589
5590                 rc = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
5591                                                     filp->f_path.dentry, &da);
5592                 if (rc)
5593                         ksmbd_debug(SMB,
5594                                     "failed to restore file attribute in EA\n");
5595                 rc = 0;
5596         }
5597
5598         if (attrs.ia_valid) {
5599                 struct dentry *dentry = filp->f_path.dentry;
5600                 struct inode *inode = d_inode(dentry);
5601
5602                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5603                         return -EACCES;
5604
5605                 inode_lock(inode);
5606                 inode->i_ctime = attrs.ia_ctime;
5607                 attrs.ia_valid &= ~ATTR_CTIME;
5608                 rc = notify_change(user_ns, dentry, &attrs, NULL);
5609                 inode_unlock(inode);
5610         }
5611         return rc;
5612 }
5613
5614 static int set_file_allocation_info(struct ksmbd_work *work,
5615                                     struct ksmbd_file *fp,
5616                                     struct smb2_file_alloc_info *file_alloc_info)
5617 {
5618         /*
5619          * TODO : It's working fine only when store dos attributes
5620          * is not yes. need to implement a logic which works
5621          * properly with any smb.conf option
5622          */
5623
5624         loff_t alloc_blks;
5625         struct inode *inode;
5626         int rc;
5627
5628         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5629                 return -EACCES;
5630
5631         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5632         inode = file_inode(fp->filp);
5633
5634         if (alloc_blks > inode->i_blocks) {
5635                 smb_break_all_levII_oplock(work, fp, 1);
5636                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5637                                    alloc_blks * 512);
5638                 if (rc && rc != -EOPNOTSUPP) {
5639                         pr_err("vfs_fallocate is failed : %d\n", rc);
5640                         return rc;
5641                 }
5642         } else if (alloc_blks < inode->i_blocks) {
5643                 loff_t size;
5644
5645                 /*
5646                  * Allocation size could be smaller than original one
5647                  * which means allocated blocks in file should be
5648                  * deallocated. use truncate to cut out it, but inode
5649                  * size is also updated with truncate offset.
5650                  * inode size is retained by backup inode size.
5651                  */
5652                 size = i_size_read(inode);
5653                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5654                 if (rc) {
5655                         pr_err("truncate failed! filename : %s, err %d\n",
5656                                fp->filename, rc);
5657                         return rc;
5658                 }
5659                 if (size < alloc_blks * 512)
5660                         i_size_write(inode, size);
5661         }
5662         return 0;
5663 }
5664
5665 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5666                                 struct smb2_file_eof_info *file_eof_info)
5667 {
5668         loff_t newsize;
5669         struct inode *inode;
5670         int rc;
5671
5672         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5673                 return -EACCES;
5674
5675         newsize = le64_to_cpu(file_eof_info->EndOfFile);
5676         inode = file_inode(fp->filp);
5677
5678         /*
5679          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5680          * on FAT32 shared device, truncate execution time is too long
5681          * and network error could cause from windows client. because
5682          * truncate of some filesystem like FAT32 fill zero data in
5683          * truncated range.
5684          */
5685         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5686                 ksmbd_debug(SMB, "filename : %s truncated to newsize %lld\n",
5687                             fp->filename, newsize);
5688                 rc = ksmbd_vfs_truncate(work, fp, newsize);
5689                 if (rc) {
5690                         ksmbd_debug(SMB, "truncate failed! filename : %s err %d\n",
5691                                     fp->filename, rc);
5692                         if (rc != -EAGAIN)
5693                                 rc = -EBADF;
5694                         return rc;
5695                 }
5696         }
5697         return 0;
5698 }
5699
5700 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5701                            struct smb2_file_rename_info *rename_info,
5702                            unsigned int buf_len)
5703 {
5704         struct user_namespace *user_ns;
5705         struct ksmbd_file *parent_fp;
5706         struct dentry *parent;
5707         struct dentry *dentry = fp->filp->f_path.dentry;
5708         int ret;
5709
5710         if (!(fp->daccess & FILE_DELETE_LE)) {
5711                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5712                 return -EACCES;
5713         }
5714
5715         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5716                         le32_to_cpu(rename_info->FileNameLength))
5717                 return -EINVAL;
5718
5719         user_ns = file_mnt_user_ns(fp->filp);
5720         if (ksmbd_stream_fd(fp))
5721                 goto next;
5722
5723         parent = dget_parent(dentry);
5724         ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
5725         if (ret) {
5726                 dput(parent);
5727                 return ret;
5728         }
5729
5730         parent_fp = ksmbd_lookup_fd_inode(d_inode(parent));
5731         inode_unlock(d_inode(parent));
5732         dput(parent);
5733
5734         if (parent_fp) {
5735                 if (parent_fp->daccess & FILE_DELETE_LE) {
5736                         pr_err("parent dir is opened with delete access\n");
5737                         return -ESHARE;
5738                 }
5739         }
5740 next:
5741         return smb2_rename(work, fp, user_ns, rename_info,
5742                            work->sess->conn->local_nls);
5743 }
5744
5745 static int set_file_disposition_info(struct ksmbd_file *fp,
5746                                      struct smb2_file_disposition_info *file_info)
5747 {
5748         struct inode *inode;
5749
5750         if (!(fp->daccess & FILE_DELETE_LE)) {
5751                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5752                 return -EACCES;
5753         }
5754
5755         inode = file_inode(fp->filp);
5756         if (file_info->DeletePending) {
5757                 if (S_ISDIR(inode->i_mode) &&
5758                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5759                         return -EBUSY;
5760                 ksmbd_set_inode_pending_delete(fp);
5761         } else {
5762                 ksmbd_clear_inode_pending_delete(fp);
5763         }
5764         return 0;
5765 }
5766
5767 static int set_file_position_info(struct ksmbd_file *fp,
5768                                   struct smb2_file_pos_info *file_info)
5769 {
5770         loff_t current_byte_offset;
5771         unsigned long sector_size;
5772         struct inode *inode;
5773
5774         inode = file_inode(fp->filp);
5775         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5776         sector_size = inode->i_sb->s_blocksize;
5777
5778         if (current_byte_offset < 0 ||
5779             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5780              current_byte_offset & (sector_size - 1))) {
5781                 pr_err("CurrentByteOffset is not valid : %llu\n",
5782                        current_byte_offset);
5783                 return -EINVAL;
5784         }
5785
5786         fp->filp->f_pos = current_byte_offset;
5787         return 0;
5788 }
5789
5790 static int set_file_mode_info(struct ksmbd_file *fp,
5791                               struct smb2_file_mode_info *file_info)
5792 {
5793         __le32 mode;
5794
5795         mode = file_info->Mode;
5796
5797         if ((mode & ~FILE_MODE_INFO_MASK) ||
5798             (mode & FILE_SYNCHRONOUS_IO_ALERT_LE &&
5799              mode & FILE_SYNCHRONOUS_IO_NONALERT_LE)) {
5800                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5801                 return -EINVAL;
5802         }
5803
5804         /*
5805          * TODO : need to implement consideration for
5806          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5807          */
5808         ksmbd_vfs_set_fadvise(fp->filp, mode);
5809         fp->coption = mode;
5810         return 0;
5811 }
5812
5813 /**
5814  * smb2_set_info_file() - handler for smb2 set info command
5815  * @work:       smb work containing set info command buffer
5816  * @fp:         ksmbd_file pointer
5817  * @info_class: smb2 set info class
5818  * @share:      ksmbd_share_config pointer
5819  *
5820  * Return:      0 on success, otherwise error
5821  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5822  */
5823 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5824                               struct smb2_set_info_req *req,
5825                               struct ksmbd_share_config *share)
5826 {
5827         unsigned int buf_len = le32_to_cpu(req->BufferLength);
5828
5829         switch (req->FileInfoClass) {
5830         case FILE_BASIC_INFORMATION:
5831         {
5832                 if (buf_len < sizeof(struct smb2_file_basic_info))
5833                         return -EINVAL;
5834
5835                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5836         }
5837         case FILE_ALLOCATION_INFORMATION:
5838         {
5839                 if (buf_len < sizeof(struct smb2_file_alloc_info))
5840                         return -EINVAL;
5841
5842                 return set_file_allocation_info(work, fp,
5843                                                 (struct smb2_file_alloc_info *)req->Buffer);
5844         }
5845         case FILE_END_OF_FILE_INFORMATION:
5846         {
5847                 if (buf_len < sizeof(struct smb2_file_eof_info))
5848                         return -EINVAL;
5849
5850                 return set_end_of_file_info(work, fp,
5851                                             (struct smb2_file_eof_info *)req->Buffer);
5852         }
5853         case FILE_RENAME_INFORMATION:
5854         {
5855                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5856                         ksmbd_debug(SMB,
5857                                     "User does not have write permission\n");
5858                         return -EACCES;
5859                 }
5860
5861                 if (buf_len < sizeof(struct smb2_file_rename_info))
5862                         return -EINVAL;
5863
5864                 return set_rename_info(work, fp,
5865                                        (struct smb2_file_rename_info *)req->Buffer,
5866                                        buf_len);
5867         }
5868         case FILE_LINK_INFORMATION:
5869         {
5870                 if (buf_len < sizeof(struct smb2_file_link_info))
5871                         return -EINVAL;
5872
5873                 return smb2_create_link(work, work->tcon->share_conf,
5874                                         (struct smb2_file_link_info *)req->Buffer,
5875                                         buf_len, fp->filp,
5876                                         work->sess->conn->local_nls);
5877         }
5878         case FILE_DISPOSITION_INFORMATION:
5879         {
5880                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5881                         ksmbd_debug(SMB,
5882                                     "User does not have write permission\n");
5883                         return -EACCES;
5884                 }
5885
5886                 if (buf_len < sizeof(struct smb2_file_disposition_info))
5887                         return -EINVAL;
5888
5889                 return set_file_disposition_info(fp,
5890                                                  (struct smb2_file_disposition_info *)req->Buffer);
5891         }
5892         case FILE_FULL_EA_INFORMATION:
5893         {
5894                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5895                         pr_err("Not permitted to write ext  attr: 0x%x\n",
5896                                fp->daccess);
5897                         return -EACCES;
5898                 }
5899
5900                 if (buf_len < sizeof(struct smb2_ea_info))
5901                         return -EINVAL;
5902
5903                 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5904                                    buf_len, &fp->filp->f_path);
5905         }
5906         case FILE_POSITION_INFORMATION:
5907         {
5908                 if (buf_len < sizeof(struct smb2_file_pos_info))
5909                         return -EINVAL;
5910
5911                 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
5912         }
5913         case FILE_MODE_INFORMATION:
5914         {
5915                 if (buf_len < sizeof(struct smb2_file_mode_info))
5916                         return -EINVAL;
5917
5918                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
5919         }
5920         }
5921
5922         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
5923         return -EOPNOTSUPP;
5924 }
5925
5926 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
5927                              char *buffer, int buf_len)
5928 {
5929         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
5930
5931         fp->saccess |= FILE_SHARE_DELETE_LE;
5932
5933         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
5934                         buf_len, false);
5935 }
5936
5937 /**
5938  * smb2_set_info() - handler for smb2 set info command handler
5939  * @work:       smb work containing set info request buffer
5940  *
5941  * Return:      0 on success, otherwise error
5942  */
5943 int smb2_set_info(struct ksmbd_work *work)
5944 {
5945         struct smb2_set_info_req *req;
5946         struct smb2_set_info_rsp *rsp, *rsp_org;
5947         struct ksmbd_file *fp;
5948         int rc = 0;
5949         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5950
5951         ksmbd_debug(SMB, "Received set info request\n");
5952
5953         rsp_org = work->response_buf;
5954         if (work->next_smb2_rcv_hdr_off) {
5955                 req = ksmbd_req_buf_next(work);
5956                 rsp = ksmbd_resp_buf_next(work);
5957                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
5958                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5959                                     work->compound_fid);
5960                         id = work->compound_fid;
5961                         pid = work->compound_pfid;
5962                 }
5963         } else {
5964                 req = work->request_buf;
5965                 rsp = work->response_buf;
5966         }
5967
5968         if (!has_file_id(id)) {
5969                 id = le64_to_cpu(req->VolatileFileId);
5970                 pid = le64_to_cpu(req->PersistentFileId);
5971         }
5972
5973         fp = ksmbd_lookup_fd_slow(work, id, pid);
5974         if (!fp) {
5975                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
5976                 rc = -ENOENT;
5977                 goto err_out;
5978         }
5979
5980         switch (req->InfoType) {
5981         case SMB2_O_INFO_FILE:
5982                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5983                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
5984                 break;
5985         case SMB2_O_INFO_SECURITY:
5986                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5987                 if (ksmbd_override_fsids(work)) {
5988                         rc = -ENOMEM;
5989                         goto err_out;
5990                 }
5991                 rc = smb2_set_info_sec(fp,
5992                                        le32_to_cpu(req->AdditionalInformation),
5993                                        req->Buffer,
5994                                        le32_to_cpu(req->BufferLength));
5995                 ksmbd_revert_fsids(work);
5996                 break;
5997         default:
5998                 rc = -EOPNOTSUPP;
5999         }
6000
6001         if (rc < 0)
6002                 goto err_out;
6003
6004         rsp->StructureSize = cpu_to_le16(2);
6005         inc_rfc1001_len(rsp_org, 2);
6006         ksmbd_fd_put(work, fp);
6007         return 0;
6008
6009 err_out:
6010         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6011                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6012         else if (rc == -EINVAL)
6013                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6014         else if (rc == -ESHARE)
6015                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6016         else if (rc == -ENOENT)
6017                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6018         else if (rc == -EBUSY || rc == -ENOTEMPTY)
6019                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6020         else if (rc == -EAGAIN)
6021                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6022         else if (rc == -EBADF || rc == -ESTALE)
6023                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6024         else if (rc == -EEXIST)
6025                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6026         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6027                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6028         smb2_set_err_rsp(work);
6029         ksmbd_fd_put(work, fp);
6030         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6031         return rc;
6032 }
6033
6034 /**
6035  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6036  * @work:       smb work containing read IPC pipe command buffer
6037  *
6038  * Return:      0 on success, otherwise error
6039  */
6040 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6041 {
6042         int nbytes = 0, err;
6043         u64 id;
6044         struct ksmbd_rpc_command *rpc_resp;
6045         struct smb2_read_req *req = work->request_buf;
6046         struct smb2_read_rsp *rsp = work->response_buf;
6047
6048         id = le64_to_cpu(req->VolatileFileId);
6049
6050         inc_rfc1001_len(rsp, 16);
6051         rpc_resp = ksmbd_rpc_read(work->sess, id);
6052         if (rpc_resp) {
6053                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6054                         err = -EINVAL;
6055                         goto out;
6056                 }
6057
6058                 work->aux_payload_buf =
6059                         kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO);
6060                 if (!work->aux_payload_buf) {
6061                         err = -ENOMEM;
6062                         goto out;
6063                 }
6064
6065                 memcpy(work->aux_payload_buf, rpc_resp->payload,
6066                        rpc_resp->payload_sz);
6067
6068                 nbytes = rpc_resp->payload_sz;
6069                 work->resp_hdr_sz = get_rfc1002_len(rsp) + 4;
6070                 work->aux_payload_sz = nbytes;
6071                 kvfree(rpc_resp);
6072         }
6073
6074         rsp->StructureSize = cpu_to_le16(17);
6075         rsp->DataOffset = 80;
6076         rsp->Reserved = 0;
6077         rsp->DataLength = cpu_to_le32(nbytes);
6078         rsp->DataRemaining = 0;
6079         rsp->Reserved2 = 0;
6080         inc_rfc1001_len(rsp, nbytes);
6081         return 0;
6082
6083 out:
6084         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6085         smb2_set_err_rsp(work);
6086         kvfree(rpc_resp);
6087         return err;
6088 }
6089
6090 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6091                                       struct smb2_read_req *req, void *data_buf,
6092                                       size_t length)
6093 {
6094         struct smb2_buffer_desc_v1 *desc =
6095                 (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
6096         int err;
6097
6098         if (work->conn->dialect == SMB30_PROT_ID &&
6099             req->Channel != SMB2_CHANNEL_RDMA_V1)
6100                 return -EINVAL;
6101
6102         if (req->ReadChannelInfoOffset == 0 ||
6103             le16_to_cpu(req->ReadChannelInfoLength) < sizeof(*desc))
6104                 return -EINVAL;
6105
6106         work->need_invalidate_rkey =
6107                 (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6108         work->remote_key = le32_to_cpu(desc->token);
6109
6110         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6111                                     le32_to_cpu(desc->token),
6112                                     le64_to_cpu(desc->offset),
6113                                     le32_to_cpu(desc->length));
6114         if (err)
6115                 return err;
6116
6117         return length;
6118 }
6119
6120 /**
6121  * smb2_read() - handler for smb2 read from file
6122  * @work:       smb work containing read command buffer
6123  *
6124  * Return:      0 on success, otherwise error
6125  */
6126 int smb2_read(struct ksmbd_work *work)
6127 {
6128         struct ksmbd_conn *conn = work->conn;
6129         struct smb2_read_req *req;
6130         struct smb2_read_rsp *rsp, *rsp_org;
6131         struct ksmbd_file *fp;
6132         loff_t offset;
6133         size_t length, mincount;
6134         ssize_t nbytes = 0, remain_bytes = 0;
6135         int err = 0;
6136
6137         rsp_org = work->response_buf;
6138         WORK_BUFFERS(work, req, rsp);
6139
6140         if (test_share_config_flag(work->tcon->share_conf,
6141                                    KSMBD_SHARE_FLAG_PIPE)) {
6142                 ksmbd_debug(SMB, "IPC pipe read request\n");
6143                 return smb2_read_pipe(work);
6144         }
6145
6146         fp = ksmbd_lookup_fd_slow(work, le64_to_cpu(req->VolatileFileId),
6147                                   le64_to_cpu(req->PersistentFileId));
6148         if (!fp) {
6149                 err = -ENOENT;
6150                 goto out;
6151         }
6152
6153         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6154                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6155                 err = -EACCES;
6156                 goto out;
6157         }
6158
6159         offset = le64_to_cpu(req->Offset);
6160         length = le32_to_cpu(req->Length);
6161         mincount = le32_to_cpu(req->MinimumCount);
6162
6163         if (length > conn->vals->max_read_size) {
6164                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6165                             conn->vals->max_read_size);
6166                 err = -EINVAL;
6167                 goto out;
6168         }
6169
6170         ksmbd_debug(SMB, "filename %pd, offset %lld, len %zu\n",
6171                     fp->filp->f_path.dentry, offset, length);
6172
6173         work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6174         if (!work->aux_payload_buf) {
6175                 err = -ENOMEM;
6176                 goto out;
6177         }
6178
6179         nbytes = ksmbd_vfs_read(work, fp, length, &offset);
6180         if (nbytes < 0) {
6181                 err = nbytes;
6182                 goto out;
6183         }
6184
6185         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6186                 kvfree(work->aux_payload_buf);
6187                 work->aux_payload_buf = NULL;
6188                 rsp->hdr.Status = STATUS_END_OF_FILE;
6189                 smb2_set_err_rsp(work);
6190                 ksmbd_fd_put(work, fp);
6191                 return 0;
6192         }
6193
6194         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6195                     nbytes, offset, mincount);
6196
6197         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6198             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6199                 /* write data to the client using rdma channel */
6200                 remain_bytes = smb2_read_rdma_channel(work, req,
6201                                                       work->aux_payload_buf,
6202                                                       nbytes);
6203                 kvfree(work->aux_payload_buf);
6204                 work->aux_payload_buf = NULL;
6205
6206                 nbytes = 0;
6207                 if (remain_bytes < 0) {
6208                         err = (int)remain_bytes;
6209                         goto out;
6210                 }
6211         }
6212
6213         rsp->StructureSize = cpu_to_le16(17);
6214         rsp->DataOffset = 80;
6215         rsp->Reserved = 0;
6216         rsp->DataLength = cpu_to_le32(nbytes);
6217         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6218         rsp->Reserved2 = 0;
6219         inc_rfc1001_len(rsp_org, 16);
6220         work->resp_hdr_sz = get_rfc1002_len(rsp_org) + 4;
6221         work->aux_payload_sz = nbytes;
6222         inc_rfc1001_len(rsp_org, nbytes);
6223         ksmbd_fd_put(work, fp);
6224         return 0;
6225
6226 out:
6227         if (err) {
6228                 if (err == -EISDIR)
6229                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6230                 else if (err == -EAGAIN)
6231                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6232                 else if (err == -ENOENT)
6233                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6234                 else if (err == -EACCES)
6235                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6236                 else if (err == -ESHARE)
6237                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6238                 else if (err == -EINVAL)
6239                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6240                 else
6241                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6242
6243                 smb2_set_err_rsp(work);
6244         }
6245         ksmbd_fd_put(work, fp);
6246         return err;
6247 }
6248
6249 /**
6250  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6251  * @work:       smb work containing write IPC pipe command buffer
6252  *
6253  * Return:      0 on success, otherwise error
6254  */
6255 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6256 {
6257         struct smb2_write_req *req = work->request_buf;
6258         struct smb2_write_rsp *rsp = work->response_buf;
6259         struct ksmbd_rpc_command *rpc_resp;
6260         u64 id = 0;
6261         int err = 0, ret = 0;
6262         char *data_buf;
6263         size_t length;
6264
6265         length = le32_to_cpu(req->Length);
6266         id = le64_to_cpu(req->VolatileFileId);
6267
6268         if (le16_to_cpu(req->DataOffset) ==
6269             (offsetof(struct smb2_write_req, Buffer) - 4)) {
6270                 data_buf = (char *)&req->Buffer[0];
6271         } else {
6272                 if ((u64)le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(req)) {
6273                         pr_err("invalid write data offset %u, smb_len %u\n",
6274                                le16_to_cpu(req->DataOffset),
6275                                get_rfc1002_len(req));
6276                         err = -EINVAL;
6277                         goto out;
6278                 }
6279
6280                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6281                                 le16_to_cpu(req->DataOffset));
6282         }
6283
6284         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6285         if (rpc_resp) {
6286                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6287                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6288                         kvfree(rpc_resp);
6289                         smb2_set_err_rsp(work);
6290                         return -EOPNOTSUPP;
6291                 }
6292                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6293                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6294                         smb2_set_err_rsp(work);
6295                         kvfree(rpc_resp);
6296                         return ret;
6297                 }
6298                 kvfree(rpc_resp);
6299         }
6300
6301         rsp->StructureSize = cpu_to_le16(17);
6302         rsp->DataOffset = 0;
6303         rsp->Reserved = 0;
6304         rsp->DataLength = cpu_to_le32(length);
6305         rsp->DataRemaining = 0;
6306         rsp->Reserved2 = 0;
6307         inc_rfc1001_len(rsp, 16);
6308         return 0;
6309 out:
6310         if (err) {
6311                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6312                 smb2_set_err_rsp(work);
6313         }
6314
6315         return err;
6316 }
6317
6318 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6319                                        struct smb2_write_req *req,
6320                                        struct ksmbd_file *fp,
6321                                        loff_t offset, size_t length, bool sync)
6322 {
6323         struct smb2_buffer_desc_v1 *desc;
6324         char *data_buf;
6325         int ret;
6326         ssize_t nbytes;
6327
6328         desc = (struct smb2_buffer_desc_v1 *)&req->Buffer[0];
6329
6330         if (work->conn->dialect == SMB30_PROT_ID &&
6331             req->Channel != SMB2_CHANNEL_RDMA_V1)
6332                 return -EINVAL;
6333
6334         if (req->Length != 0 || req->DataOffset != 0)
6335                 return -EINVAL;
6336
6337         if (req->WriteChannelInfoOffset == 0 ||
6338             le16_to_cpu(req->WriteChannelInfoLength) < sizeof(*desc))
6339                 return -EINVAL;
6340
6341         work->need_invalidate_rkey =
6342                 (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6343         work->remote_key = le32_to_cpu(desc->token);
6344
6345         data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6346         if (!data_buf)
6347                 return -ENOMEM;
6348
6349         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6350                                    le32_to_cpu(desc->token),
6351                                    le64_to_cpu(desc->offset),
6352                                    le32_to_cpu(desc->length));
6353         if (ret < 0) {
6354                 kvfree(data_buf);
6355                 return ret;
6356         }
6357
6358         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6359         kvfree(data_buf);
6360         if (ret < 0)
6361                 return ret;
6362
6363         return nbytes;
6364 }
6365
6366 /**
6367  * smb2_write() - handler for smb2 write from file
6368  * @work:       smb work containing write command buffer
6369  *
6370  * Return:      0 on success, otherwise error
6371  */
6372 int smb2_write(struct ksmbd_work *work)
6373 {
6374         struct smb2_write_req *req;
6375         struct smb2_write_rsp *rsp, *rsp_org;
6376         struct ksmbd_file *fp = NULL;
6377         loff_t offset;
6378         size_t length;
6379         ssize_t nbytes;
6380         char *data_buf;
6381         bool writethrough = false;
6382         int err = 0;
6383
6384         rsp_org = work->response_buf;
6385         WORK_BUFFERS(work, req, rsp);
6386
6387         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6388                 ksmbd_debug(SMB, "IPC pipe write request\n");
6389                 return smb2_write_pipe(work);
6390         }
6391
6392         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6393                 ksmbd_debug(SMB, "User does not have write permission\n");
6394                 err = -EACCES;
6395                 goto out;
6396         }
6397
6398         fp = ksmbd_lookup_fd_slow(work, le64_to_cpu(req->VolatileFileId),
6399                                   le64_to_cpu(req->PersistentFileId));
6400         if (!fp) {
6401                 err = -ENOENT;
6402                 goto out;
6403         }
6404
6405         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6406                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6407                 err = -EACCES;
6408                 goto out;
6409         }
6410
6411         offset = le64_to_cpu(req->Offset);
6412         length = le32_to_cpu(req->Length);
6413
6414         if (length > work->conn->vals->max_write_size) {
6415                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6416                             work->conn->vals->max_write_size);
6417                 err = -EINVAL;
6418                 goto out;
6419         }
6420
6421         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6422                 writethrough = true;
6423
6424         if (req->Channel != SMB2_CHANNEL_RDMA_V1 &&
6425             req->Channel != SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6426                 if (le16_to_cpu(req->DataOffset) ==
6427                     (offsetof(struct smb2_write_req, Buffer) - 4)) {
6428                         data_buf = (char *)&req->Buffer[0];
6429                 } else {
6430                         if ((u64)le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(req)) {
6431                                 pr_err("invalid write data offset %u, smb_len %u\n",
6432                                        le16_to_cpu(req->DataOffset),
6433                                        get_rfc1002_len(req));
6434                                 err = -EINVAL;
6435                                 goto out;
6436                         }
6437
6438                         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6439                                         le16_to_cpu(req->DataOffset));
6440                 }
6441
6442                 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6443                 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6444                         writethrough = true;
6445
6446                 ksmbd_debug(SMB, "filename %pd, offset %lld, len %zu\n",
6447                             fp->filp->f_path.dentry, offset, length);
6448                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6449                                       writethrough, &nbytes);
6450                 if (err < 0)
6451                         goto out;
6452         } else {
6453                 /* read data from the client using rdma channel, and
6454                  * write the data.
6455                  */
6456                 nbytes = smb2_write_rdma_channel(work, req, fp, offset,
6457                                                  le32_to_cpu(req->RemainingBytes),
6458                                                  writethrough);
6459                 if (nbytes < 0) {
6460                         err = (int)nbytes;
6461                         goto out;
6462                 }
6463         }
6464
6465         rsp->StructureSize = cpu_to_le16(17);
6466         rsp->DataOffset = 0;
6467         rsp->Reserved = 0;
6468         rsp->DataLength = cpu_to_le32(nbytes);
6469         rsp->DataRemaining = 0;
6470         rsp->Reserved2 = 0;
6471         inc_rfc1001_len(rsp_org, 16);
6472         ksmbd_fd_put(work, fp);
6473         return 0;
6474
6475 out:
6476         if (err == -EAGAIN)
6477                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6478         else if (err == -ENOSPC || err == -EFBIG)
6479                 rsp->hdr.Status = STATUS_DISK_FULL;
6480         else if (err == -ENOENT)
6481                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6482         else if (err == -EACCES)
6483                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6484         else if (err == -ESHARE)
6485                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6486         else if (err == -EINVAL)
6487                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6488         else
6489                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6490
6491         smb2_set_err_rsp(work);
6492         ksmbd_fd_put(work, fp);
6493         return err;
6494 }
6495
6496 /**
6497  * smb2_flush() - handler for smb2 flush file - fsync
6498  * @work:       smb work containing flush command buffer
6499  *
6500  * Return:      0 on success, otherwise error
6501  */
6502 int smb2_flush(struct ksmbd_work *work)
6503 {
6504         struct smb2_flush_req *req;
6505         struct smb2_flush_rsp *rsp, *rsp_org;
6506         int err;
6507
6508         rsp_org = work->response_buf;
6509         WORK_BUFFERS(work, req, rsp);
6510
6511         ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n",
6512                     le64_to_cpu(req->VolatileFileId));
6513
6514         err = ksmbd_vfs_fsync(work,
6515                               le64_to_cpu(req->VolatileFileId),
6516                               le64_to_cpu(req->PersistentFileId));
6517         if (err)
6518                 goto out;
6519
6520         rsp->StructureSize = cpu_to_le16(4);
6521         rsp->Reserved = 0;
6522         inc_rfc1001_len(rsp_org, 4);
6523         return 0;
6524
6525 out:
6526         if (err) {
6527                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6528                 smb2_set_err_rsp(work);
6529         }
6530
6531         return err;
6532 }
6533
6534 /**
6535  * smb2_cancel() - handler for smb2 cancel command
6536  * @work:       smb work containing cancel command buffer
6537  *
6538  * Return:      0 on success, otherwise error
6539  */
6540 int smb2_cancel(struct ksmbd_work *work)
6541 {
6542         struct ksmbd_conn *conn = work->conn;
6543         struct smb2_hdr *hdr = work->request_buf;
6544         struct smb2_hdr *chdr;
6545         struct ksmbd_work *cancel_work = NULL;
6546         int canceled = 0;
6547         struct list_head *command_list;
6548
6549         ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6550                     hdr->MessageId, hdr->Flags);
6551
6552         if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6553                 command_list = &conn->async_requests;
6554
6555                 spin_lock(&conn->request_lock);
6556                 list_for_each_entry(cancel_work, command_list,
6557                                     async_request_entry) {
6558                         chdr = cancel_work->request_buf;
6559
6560                         if (cancel_work->async_id !=
6561                             le64_to_cpu(hdr->Id.AsyncId))
6562                                 continue;
6563
6564                         ksmbd_debug(SMB,
6565                                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6566                                     le64_to_cpu(hdr->Id.AsyncId),
6567                                     le16_to_cpu(chdr->Command));
6568                         canceled = 1;
6569                         break;
6570                 }
6571                 spin_unlock(&conn->request_lock);
6572         } else {
6573                 command_list = &conn->requests;
6574
6575                 spin_lock(&conn->request_lock);
6576                 list_for_each_entry(cancel_work, command_list, request_entry) {
6577                         chdr = cancel_work->request_buf;
6578
6579                         if (chdr->MessageId != hdr->MessageId ||
6580                             cancel_work == work)
6581                                 continue;
6582
6583                         ksmbd_debug(SMB,
6584                                     "smb2 with mid %llu cancelled command = 0x%x\n",
6585                                     le64_to_cpu(hdr->MessageId),
6586                                     le16_to_cpu(chdr->Command));
6587                         canceled = 1;
6588                         break;
6589                 }
6590                 spin_unlock(&conn->request_lock);
6591         }
6592
6593         if (canceled) {
6594                 cancel_work->state = KSMBD_WORK_CANCELLED;
6595                 if (cancel_work->cancel_fn)
6596                         cancel_work->cancel_fn(cancel_work->cancel_argv);
6597         }
6598
6599         /* For SMB2_CANCEL command itself send no response*/
6600         work->send_no_response = 1;
6601         return 0;
6602 }
6603
6604 struct file_lock *smb_flock_init(struct file *f)
6605 {
6606         struct file_lock *fl;
6607
6608         fl = locks_alloc_lock();
6609         if (!fl)
6610                 goto out;
6611
6612         locks_init_lock(fl);
6613
6614         fl->fl_owner = f;
6615         fl->fl_pid = current->tgid;
6616         fl->fl_file = f;
6617         fl->fl_flags = FL_POSIX;
6618         fl->fl_ops = NULL;
6619         fl->fl_lmops = NULL;
6620
6621 out:
6622         return fl;
6623 }
6624
6625 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6626 {
6627         int cmd = -EINVAL;
6628
6629         /* Checking for wrong flag combination during lock request*/
6630         switch (flags) {
6631         case SMB2_LOCKFLAG_SHARED:
6632                 ksmbd_debug(SMB, "received shared request\n");
6633                 cmd = F_SETLKW;
6634                 flock->fl_type = F_RDLCK;
6635                 flock->fl_flags |= FL_SLEEP;
6636                 break;
6637         case SMB2_LOCKFLAG_EXCLUSIVE:
6638                 ksmbd_debug(SMB, "received exclusive request\n");
6639                 cmd = F_SETLKW;
6640                 flock->fl_type = F_WRLCK;
6641                 flock->fl_flags |= FL_SLEEP;
6642                 break;
6643         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6644                 ksmbd_debug(SMB,
6645                             "received shared & fail immediately request\n");
6646                 cmd = F_SETLK;
6647                 flock->fl_type = F_RDLCK;
6648                 break;
6649         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6650                 ksmbd_debug(SMB,
6651                             "received exclusive & fail immediately request\n");
6652                 cmd = F_SETLK;
6653                 flock->fl_type = F_WRLCK;
6654                 break;
6655         case SMB2_LOCKFLAG_UNLOCK:
6656                 ksmbd_debug(SMB, "received unlock request\n");
6657                 flock->fl_type = F_UNLCK;
6658                 cmd = 0;
6659                 break;
6660         }
6661
6662         return cmd;
6663 }
6664
6665 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6666                                          unsigned int cmd, int flags,
6667                                          struct list_head *lock_list)
6668 {
6669         struct ksmbd_lock *lock;
6670
6671         lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6672         if (!lock)
6673                 return NULL;
6674
6675         lock->cmd = cmd;
6676         lock->fl = flock;
6677         lock->start = flock->fl_start;
6678         lock->end = flock->fl_end;
6679         lock->flags = flags;
6680         if (lock->start == lock->end)
6681                 lock->zero_len = 1;
6682         INIT_LIST_HEAD(&lock->clist);
6683         INIT_LIST_HEAD(&lock->flist);
6684         INIT_LIST_HEAD(&lock->llist);
6685         list_add_tail(&lock->llist, lock_list);
6686
6687         return lock;
6688 }
6689
6690 static void smb2_remove_blocked_lock(void **argv)
6691 {
6692         struct file_lock *flock = (struct file_lock *)argv[0];
6693
6694         ksmbd_vfs_posix_lock_unblock(flock);
6695         wake_up(&flock->fl_wait);
6696 }
6697
6698 static inline bool lock_defer_pending(struct file_lock *fl)
6699 {
6700         /* check pending lock waiters */
6701         return waitqueue_active(&fl->fl_wait);
6702 }
6703
6704 /**
6705  * smb2_lock() - handler for smb2 file lock command
6706  * @work:       smb work containing lock command buffer
6707  *
6708  * Return:      0 on success, otherwise error
6709  */
6710 int smb2_lock(struct ksmbd_work *work)
6711 {
6712         struct smb2_lock_req *req = work->request_buf;
6713         struct smb2_lock_rsp *rsp = work->response_buf;
6714         struct smb2_lock_element *lock_ele;
6715         struct ksmbd_file *fp = NULL;
6716         struct file_lock *flock = NULL;
6717         struct file *filp = NULL;
6718         int lock_count;
6719         int flags = 0;
6720         int cmd = 0;
6721         int err = -EIO, i, rc = 0;
6722         u64 lock_start, lock_length;
6723         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6724         struct ksmbd_conn *conn;
6725         int nolock = 0;
6726         LIST_HEAD(lock_list);
6727         LIST_HEAD(rollback_list);
6728         int prior_lock = 0;
6729
6730         ksmbd_debug(SMB, "Received lock request\n");
6731         fp = ksmbd_lookup_fd_slow(work,
6732                                   le64_to_cpu(req->VolatileFileId),
6733                                   le64_to_cpu(req->PersistentFileId));
6734         if (!fp) {
6735                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n",
6736                             le64_to_cpu(req->VolatileFileId));
6737                 err = -ENOENT;
6738                 goto out2;
6739         }
6740
6741         filp = fp->filp;
6742         lock_count = le16_to_cpu(req->LockCount);
6743         lock_ele = req->locks;
6744
6745         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6746         if (!lock_count) {
6747                 err = -EINVAL;
6748                 goto out2;
6749         }
6750
6751         for (i = 0; i < lock_count; i++) {
6752                 flags = le32_to_cpu(lock_ele[i].Flags);
6753
6754                 flock = smb_flock_init(filp);
6755                 if (!flock)
6756                         goto out;
6757
6758                 cmd = smb2_set_flock_flags(flock, flags);
6759
6760                 lock_start = le64_to_cpu(lock_ele[i].Offset);
6761                 lock_length = le64_to_cpu(lock_ele[i].Length);
6762                 if (lock_start > U64_MAX - lock_length) {
6763                         pr_err("Invalid lock range requested\n");
6764                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6765                         goto out;
6766                 }
6767
6768                 if (lock_start > OFFSET_MAX)
6769                         flock->fl_start = OFFSET_MAX;
6770                 else
6771                         flock->fl_start = lock_start;
6772
6773                 lock_length = le64_to_cpu(lock_ele[i].Length);
6774                 if (lock_length > OFFSET_MAX - flock->fl_start)
6775                         lock_length = OFFSET_MAX - flock->fl_start;
6776
6777                 flock->fl_end = flock->fl_start + lock_length;
6778
6779                 if (flock->fl_end < flock->fl_start) {
6780                         ksmbd_debug(SMB,
6781                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
6782                                     flock->fl_end, flock->fl_start);
6783                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6784                         goto out;
6785                 }
6786
6787                 /* Check conflict locks in one request */
6788                 list_for_each_entry(cmp_lock, &lock_list, llist) {
6789                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
6790                             cmp_lock->fl->fl_end >= flock->fl_end) {
6791                                 if (cmp_lock->fl->fl_type != F_UNLCK &&
6792                                     flock->fl_type != F_UNLCK) {
6793                                         pr_err("conflict two locks in one request\n");
6794                                         err = -EINVAL;
6795                                         goto out;
6796                                 }
6797                         }
6798                 }
6799
6800                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6801                 if (!smb_lock) {
6802                         err = -EINVAL;
6803                         goto out;
6804                 }
6805         }
6806
6807         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6808                 if (smb_lock->cmd < 0) {
6809                         err = -EINVAL;
6810                         goto out;
6811                 }
6812
6813                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6814                         err = -EINVAL;
6815                         goto out;
6816                 }
6817
6818                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6819                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6820                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6821                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6822                         err = -EINVAL;
6823                         goto out;
6824                 }
6825
6826                 prior_lock = smb_lock->flags;
6827
6828                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6829                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6830                         goto no_check_cl;
6831
6832                 nolock = 1;
6833                 /* check locks in connection list */
6834                 read_lock(&conn_list_lock);
6835                 list_for_each_entry(conn, &conn_list, conns_list) {
6836                         spin_lock(&conn->llist_lock);
6837                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6838                                 if (file_inode(cmp_lock->fl->fl_file) !=
6839                                     file_inode(smb_lock->fl->fl_file))
6840                                         continue;
6841
6842                                 if (smb_lock->fl->fl_type == F_UNLCK) {
6843                                         if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6844                                             cmp_lock->start == smb_lock->start &&
6845                                             cmp_lock->end == smb_lock->end &&
6846                                             !lock_defer_pending(cmp_lock->fl)) {
6847                                                 nolock = 0;
6848                                                 list_del(&cmp_lock->flist);
6849                                                 list_del(&cmp_lock->clist);
6850                                                 spin_unlock(&conn->llist_lock);
6851                                                 read_unlock(&conn_list_lock);
6852
6853                                                 locks_free_lock(cmp_lock->fl);
6854                                                 kfree(cmp_lock);
6855                                                 goto out_check_cl;
6856                                         }
6857                                         continue;
6858                                 }
6859
6860                                 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
6861                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
6862                                                 continue;
6863                                 } else {
6864                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
6865                                                 continue;
6866                                 }
6867
6868                                 /* check zero byte lock range */
6869                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
6870                                     cmp_lock->start > smb_lock->start &&
6871                                     cmp_lock->start < smb_lock->end) {
6872                                         spin_unlock(&conn->llist_lock);
6873                                         read_unlock(&conn_list_lock);
6874                                         pr_err("previous lock conflict with zero byte lock range\n");
6875                                         goto out;
6876                                 }
6877
6878                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
6879                                     smb_lock->start > cmp_lock->start &&
6880                                     smb_lock->start < cmp_lock->end) {
6881                                         spin_unlock(&conn->llist_lock);
6882                                         read_unlock(&conn_list_lock);
6883                                         pr_err("current lock conflict with zero byte lock range\n");
6884                                         goto out;
6885                                 }
6886
6887                                 if (((cmp_lock->start <= smb_lock->start &&
6888                                       cmp_lock->end > smb_lock->start) ||
6889                                      (cmp_lock->start < smb_lock->end &&
6890                                       cmp_lock->end >= smb_lock->end)) &&
6891                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
6892                                         spin_unlock(&conn->llist_lock);
6893                                         read_unlock(&conn_list_lock);
6894                                         pr_err("Not allow lock operation on exclusive lock range\n");
6895                                         goto out;
6896                                 }
6897                         }
6898                         spin_unlock(&conn->llist_lock);
6899                 }
6900                 read_unlock(&conn_list_lock);
6901 out_check_cl:
6902                 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
6903                         pr_err("Try to unlock nolocked range\n");
6904                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
6905                         goto out;
6906                 }
6907
6908 no_check_cl:
6909                 if (smb_lock->zero_len) {
6910                         err = 0;
6911                         goto skip;
6912                 }
6913
6914                 flock = smb_lock->fl;
6915                 list_del(&smb_lock->llist);
6916 retry:
6917                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
6918 skip:
6919                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
6920                         if (!rc) {
6921                                 ksmbd_debug(SMB, "File unlocked\n");
6922                         } else if (rc == -ENOENT) {
6923                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
6924                                 goto out;
6925                         }
6926                         locks_free_lock(flock);
6927                         kfree(smb_lock);
6928                 } else {
6929                         if (rc == FILE_LOCK_DEFERRED) {
6930                                 void **argv;
6931
6932                                 ksmbd_debug(SMB,
6933                                             "would have to wait for getting lock\n");
6934                                 spin_lock(&work->conn->llist_lock);
6935                                 list_add_tail(&smb_lock->clist,
6936                                               &work->conn->lock_list);
6937                                 spin_unlock(&work->conn->llist_lock);
6938                                 list_add(&smb_lock->llist, &rollback_list);
6939
6940                                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
6941                                 if (!argv) {
6942                                         err = -ENOMEM;
6943                                         goto out;
6944                                 }
6945                                 argv[0] = flock;
6946
6947                                 rc = setup_async_work(work,
6948                                                       smb2_remove_blocked_lock,
6949                                                       argv);
6950                                 if (rc) {
6951                                         err = -ENOMEM;
6952                                         goto out;
6953                                 }
6954                                 spin_lock(&fp->f_lock);
6955                                 list_add(&work->fp_entry, &fp->blocked_works);
6956                                 spin_unlock(&fp->f_lock);
6957
6958                                 smb2_send_interim_resp(work, STATUS_PENDING);
6959
6960                                 ksmbd_vfs_posix_lock_wait(flock);
6961
6962                                 if (work->state != KSMBD_WORK_ACTIVE) {
6963                                         list_del(&smb_lock->llist);
6964                                         spin_lock(&work->conn->llist_lock);
6965                                         list_del(&smb_lock->clist);
6966                                         spin_unlock(&work->conn->llist_lock);
6967                                         locks_free_lock(flock);
6968
6969                                         if (work->state == KSMBD_WORK_CANCELLED) {
6970                                                 spin_lock(&fp->f_lock);
6971                                                 list_del(&work->fp_entry);
6972                                                 spin_unlock(&fp->f_lock);
6973                                                 rsp->hdr.Status =
6974                                                         STATUS_CANCELLED;
6975                                                 kfree(smb_lock);
6976                                                 smb2_send_interim_resp(work,
6977                                                                        STATUS_CANCELLED);
6978                                                 work->send_no_response = 1;
6979                                                 goto out;
6980                                         }
6981                                         init_smb2_rsp_hdr(work);
6982                                         smb2_set_err_rsp(work);
6983                                         rsp->hdr.Status =
6984                                                 STATUS_RANGE_NOT_LOCKED;
6985                                         kfree(smb_lock);
6986                                         goto out2;
6987                                 }
6988
6989                                 list_del(&smb_lock->llist);
6990                                 spin_lock(&work->conn->llist_lock);
6991                                 list_del(&smb_lock->clist);
6992                                 spin_unlock(&work->conn->llist_lock);
6993
6994                                 spin_lock(&fp->f_lock);
6995                                 list_del(&work->fp_entry);
6996                                 spin_unlock(&fp->f_lock);
6997                                 goto retry;
6998                         } else if (!rc) {
6999                                 spin_lock(&work->conn->llist_lock);
7000                                 list_add_tail(&smb_lock->clist,
7001                                               &work->conn->lock_list);
7002                                 list_add_tail(&smb_lock->flist,
7003                                               &fp->lock_list);
7004                                 spin_unlock(&work->conn->llist_lock);
7005                                 list_add(&smb_lock->llist, &rollback_list);
7006                                 ksmbd_debug(SMB, "successful in taking lock\n");
7007                         } else {
7008                                 goto out;
7009                         }
7010                 }
7011         }
7012
7013         if (atomic_read(&fp->f_ci->op_count) > 1)
7014                 smb_break_all_oplock(work, fp);
7015
7016         rsp->StructureSize = cpu_to_le16(4);
7017         ksmbd_debug(SMB, "successful in taking lock\n");
7018         rsp->hdr.Status = STATUS_SUCCESS;
7019         rsp->Reserved = 0;
7020         inc_rfc1001_len(rsp, 4);
7021         ksmbd_fd_put(work, fp);
7022         return 0;
7023
7024 out:
7025         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7026                 locks_free_lock(smb_lock->fl);
7027                 list_del(&smb_lock->llist);
7028                 kfree(smb_lock);
7029         }
7030
7031         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7032                 struct file_lock *rlock = NULL;
7033
7034                 rlock = smb_flock_init(filp);
7035                 rlock->fl_type = F_UNLCK;
7036                 rlock->fl_start = smb_lock->start;
7037                 rlock->fl_end = smb_lock->end;
7038
7039                 rc = vfs_lock_file(filp, 0, rlock, NULL);
7040                 if (rc)
7041                         pr_err("rollback unlock fail : %d\n", rc);
7042
7043                 list_del(&smb_lock->llist);
7044                 spin_lock(&work->conn->llist_lock);
7045                 if (!list_empty(&smb_lock->flist))
7046                         list_del(&smb_lock->flist);
7047                 list_del(&smb_lock->clist);
7048                 spin_unlock(&work->conn->llist_lock);
7049
7050                 locks_free_lock(smb_lock->fl);
7051                 locks_free_lock(rlock);
7052                 kfree(smb_lock);
7053         }
7054 out2:
7055         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7056
7057         if (!rsp->hdr.Status) {
7058                 if (err == -EINVAL)
7059                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7060                 else if (err == -ENOMEM)
7061                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7062                 else if (err == -ENOENT)
7063                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7064                 else
7065                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7066         }
7067
7068         smb2_set_err_rsp(work);
7069         ksmbd_fd_put(work, fp);
7070         return err;
7071 }
7072
7073 static int fsctl_copychunk(struct ksmbd_work *work,
7074                            struct copychunk_ioctl_req *ci_req,
7075                            unsigned int cnt_code,
7076                            unsigned int input_count,
7077                            unsigned long long volatile_id,
7078                            unsigned long long persistent_id,
7079                            struct smb2_ioctl_rsp *rsp)
7080 {
7081         struct copychunk_ioctl_rsp *ci_rsp;
7082         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7083         struct srv_copychunk *chunks;
7084         unsigned int i, chunk_count, chunk_count_written = 0;
7085         unsigned int chunk_size_written = 0;
7086         loff_t total_size_written = 0;
7087         int ret = 0;
7088
7089         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7090
7091         rsp->VolatileFileId = cpu_to_le64(volatile_id);
7092         rsp->PersistentFileId = cpu_to_le64(persistent_id);
7093         ci_rsp->ChunksWritten =
7094                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7095         ci_rsp->ChunkBytesWritten =
7096                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7097         ci_rsp->TotalBytesWritten =
7098                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7099
7100         chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7101         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7102         if (chunk_count == 0)
7103                 goto out;
7104         total_size_written = 0;
7105
7106         /* verify the SRV_COPYCHUNK_COPY packet */
7107         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7108             input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7109              chunk_count * sizeof(struct srv_copychunk)) {
7110                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7111                 return -EINVAL;
7112         }
7113
7114         for (i = 0; i < chunk_count; i++) {
7115                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7116                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7117                         break;
7118                 total_size_written += le32_to_cpu(chunks[i].Length);
7119         }
7120
7121         if (i < chunk_count ||
7122             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7123                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7124                 return -EINVAL;
7125         }
7126
7127         src_fp = ksmbd_lookup_foreign_fd(work,
7128                                          le64_to_cpu(ci_req->ResumeKey[0]));
7129         dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7130         ret = -EINVAL;
7131         if (!src_fp ||
7132             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7133                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7134                 goto out;
7135         }
7136
7137         if (!dst_fp) {
7138                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7139                 goto out;
7140         }
7141
7142         /*
7143          * FILE_READ_DATA should only be included in
7144          * the FSCTL_COPYCHUNK case
7145          */
7146         if (cnt_code == FSCTL_COPYCHUNK &&
7147             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7148                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7149                 goto out;
7150         }
7151
7152         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7153                                          chunks, chunk_count,
7154                                          &chunk_count_written,
7155                                          &chunk_size_written,
7156                                          &total_size_written);
7157         if (ret < 0) {
7158                 if (ret == -EACCES)
7159                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7160                 if (ret == -EAGAIN)
7161                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7162                 else if (ret == -EBADF)
7163                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7164                 else if (ret == -EFBIG || ret == -ENOSPC)
7165                         rsp->hdr.Status = STATUS_DISK_FULL;
7166                 else if (ret == -EINVAL)
7167                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7168                 else if (ret == -EISDIR)
7169                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7170                 else if (ret == -E2BIG)
7171                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7172                 else
7173                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7174         }
7175
7176         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7177         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7178         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7179 out:
7180         ksmbd_fd_put(work, src_fp);
7181         ksmbd_fd_put(work, dst_fp);
7182         return ret;
7183 }
7184
7185 static __be32 idev_ipv4_address(struct in_device *idev)
7186 {
7187         __be32 addr = 0;
7188
7189         struct in_ifaddr *ifa;
7190
7191         rcu_read_lock();
7192         in_dev_for_each_ifa_rcu(ifa, idev) {
7193                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7194                         continue;
7195
7196                 addr = ifa->ifa_address;
7197                 break;
7198         }
7199         rcu_read_unlock();
7200         return addr;
7201 }
7202
7203 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7204                                         struct smb2_ioctl_rsp *rsp,
7205                                         unsigned int out_buf_len)
7206 {
7207         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7208         int nbytes = 0;
7209         struct net_device *netdev;
7210         struct sockaddr_storage_rsp *sockaddr_storage;
7211         unsigned int flags;
7212         unsigned long long speed;
7213         struct sockaddr_in6 *csin6 = (struct sockaddr_in6 *)&conn->peer_addr;
7214
7215         rtnl_lock();
7216         for_each_netdev(&init_net, netdev) {
7217                 if (out_buf_len <
7218                     nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7219                         rtnl_unlock();
7220                         return -ENOSPC;
7221                 }
7222
7223                 if (netdev->type == ARPHRD_LOOPBACK)
7224                         continue;
7225
7226                 flags = dev_get_flags(netdev);
7227                 if (!(flags & IFF_RUNNING))
7228                         continue;
7229
7230                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7231                                 &rsp->Buffer[nbytes];
7232                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7233
7234                 nii_rsp->Capability = 0;
7235                 if (ksmbd_rdma_capable_netdev(netdev))
7236                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7237
7238                 nii_rsp->Next = cpu_to_le32(152);
7239                 nii_rsp->Reserved = 0;
7240
7241                 if (netdev->ethtool_ops->get_link_ksettings) {
7242                         struct ethtool_link_ksettings cmd;
7243
7244                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7245                         speed = cmd.base.speed;
7246                 } else {
7247                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7248                                     "speed is unknown, defaulting to 1Gb/sec");
7249                         speed = SPEED_1000;
7250                 }
7251
7252                 speed *= 1000000;
7253                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7254
7255                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7256                                         nii_rsp->SockAddr_Storage;
7257                 memset(sockaddr_storage, 0, 128);
7258
7259                 if (conn->peer_addr.ss_family == PF_INET ||
7260                     ipv6_addr_v4mapped(&csin6->sin6_addr)) {
7261                         struct in_device *idev;
7262
7263                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7264                         sockaddr_storage->addr4.Port = 0;
7265
7266                         idev = __in_dev_get_rtnl(netdev);
7267                         if (!idev)
7268                                 continue;
7269                         sockaddr_storage->addr4.IPv4address =
7270                                                 idev_ipv4_address(idev);
7271                 } else {
7272                         struct inet6_dev *idev6;
7273                         struct inet6_ifaddr *ifa;
7274                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7275
7276                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7277                         sockaddr_storage->addr6.Port = 0;
7278                         sockaddr_storage->addr6.FlowInfo = 0;
7279
7280                         idev6 = __in6_dev_get(netdev);
7281                         if (!idev6)
7282                                 continue;
7283
7284                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7285                                 if (ifa->flags & (IFA_F_TENTATIVE |
7286                                                         IFA_F_DEPRECATED))
7287                                         continue;
7288                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7289                                 break;
7290                         }
7291                         sockaddr_storage->addr6.ScopeId = 0;
7292                 }
7293
7294                 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7295         }
7296         rtnl_unlock();
7297
7298         /* zero if this is last one */
7299         if (nii_rsp)
7300                 nii_rsp->Next = 0;
7301
7302         rsp->PersistentFileId = cpu_to_le64(SMB2_NO_FID);
7303         rsp->VolatileFileId = cpu_to_le64(SMB2_NO_FID);
7304         return nbytes;
7305 }
7306
7307 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7308                                          struct validate_negotiate_info_req *neg_req,
7309                                          struct validate_negotiate_info_rsp *neg_rsp,
7310                                          unsigned int in_buf_len)
7311 {
7312         int ret = 0;
7313         int dialect;
7314
7315         if (in_buf_len < sizeof(struct validate_negotiate_info_req) +
7316                         le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7317                 return -EINVAL;
7318
7319         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7320                                              neg_req->DialectCount);
7321         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7322                 ret = -EINVAL;
7323                 goto err_out;
7324         }
7325
7326         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7327                 ret = -EINVAL;
7328                 goto err_out;
7329         }
7330
7331         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7332                 ret = -EINVAL;
7333                 goto err_out;
7334         }
7335
7336         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7337                 ret = -EINVAL;
7338                 goto err_out;
7339         }
7340
7341         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7342         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7343         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7344         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7345 err_out:
7346         return ret;
7347 }
7348
7349 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7350                                         struct file_allocated_range_buffer *qar_req,
7351                                         struct file_allocated_range_buffer *qar_rsp,
7352                                         unsigned int in_count, unsigned int *out_count)
7353 {
7354         struct ksmbd_file *fp;
7355         loff_t start, length;
7356         int ret = 0;
7357
7358         *out_count = 0;
7359         if (in_count == 0)
7360                 return -EINVAL;
7361
7362         fp = ksmbd_lookup_fd_fast(work, id);
7363         if (!fp)
7364                 return -ENOENT;
7365
7366         start = le64_to_cpu(qar_req->file_offset);
7367         length = le64_to_cpu(qar_req->length);
7368
7369         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7370                                    qar_rsp, in_count, out_count);
7371         if (ret && ret != -E2BIG)
7372                 *out_count = 0;
7373
7374         ksmbd_fd_put(work, fp);
7375         return ret;
7376 }
7377
7378 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7379                                  unsigned int out_buf_len,
7380                                  struct smb2_ioctl_req *req,
7381                                  struct smb2_ioctl_rsp *rsp)
7382 {
7383         struct ksmbd_rpc_command *rpc_resp;
7384         char *data_buf = (char *)&req->Buffer[0];
7385         int nbytes = 0;
7386
7387         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7388                                    le32_to_cpu(req->InputCount));
7389         if (rpc_resp) {
7390                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7391                         /*
7392                          * set STATUS_SOME_NOT_MAPPED response
7393                          * for unknown domain sid.
7394                          */
7395                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7396                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7397                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7398                         goto out;
7399                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7400                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7401                         goto out;
7402                 }
7403
7404                 nbytes = rpc_resp->payload_sz;
7405                 if (rpc_resp->payload_sz > out_buf_len) {
7406                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7407                         nbytes = out_buf_len;
7408                 }
7409
7410                 if (!rpc_resp->payload_sz) {
7411                         rsp->hdr.Status =
7412                                 STATUS_UNEXPECTED_IO_ERROR;
7413                         goto out;
7414                 }
7415
7416                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7417         }
7418 out:
7419         kvfree(rpc_resp);
7420         return nbytes;
7421 }
7422
7423 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7424                                    struct file_sparse *sparse)
7425 {
7426         struct ksmbd_file *fp;
7427         struct user_namespace *user_ns;
7428         int ret = 0;
7429         __le32 old_fattr;
7430
7431         fp = ksmbd_lookup_fd_fast(work, id);
7432         if (!fp)
7433                 return -ENOENT;
7434         user_ns = file_mnt_user_ns(fp->filp);
7435
7436         old_fattr = fp->f_ci->m_fattr;
7437         if (sparse->SetSparse)
7438                 fp->f_ci->m_fattr |= ATTR_SPARSE_FILE_LE;
7439         else
7440                 fp->f_ci->m_fattr &= ~ATTR_SPARSE_FILE_LE;
7441
7442         if (fp->f_ci->m_fattr != old_fattr &&
7443             test_share_config_flag(work->tcon->share_conf,
7444                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7445                 struct xattr_dos_attrib da;
7446
7447                 ret = ksmbd_vfs_get_dos_attrib_xattr(user_ns,
7448                                                      fp->filp->f_path.dentry, &da);
7449                 if (ret <= 0)
7450                         goto out;
7451
7452                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7453                 ret = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
7454                                                      fp->filp->f_path.dentry, &da);
7455                 if (ret)
7456                         fp->f_ci->m_fattr = old_fattr;
7457         }
7458
7459 out:
7460         ksmbd_fd_put(work, fp);
7461         return ret;
7462 }
7463
7464 static int fsctl_request_resume_key(struct ksmbd_work *work,
7465                                     struct smb2_ioctl_req *req,
7466                                     struct resume_key_ioctl_rsp *key_rsp)
7467 {
7468         struct ksmbd_file *fp;
7469
7470         fp = ksmbd_lookup_fd_slow(work,
7471                                   le64_to_cpu(req->VolatileFileId),
7472                                   le64_to_cpu(req->PersistentFileId));
7473         if (!fp)
7474                 return -ENOENT;
7475
7476         memset(key_rsp, 0, sizeof(*key_rsp));
7477         key_rsp->ResumeKey[0] = req->VolatileFileId;
7478         key_rsp->ResumeKey[1] = req->PersistentFileId;
7479         ksmbd_fd_put(work, fp);
7480
7481         return 0;
7482 }
7483
7484 /**
7485  * smb2_ioctl() - handler for smb2 ioctl command
7486  * @work:       smb work containing ioctl command buffer
7487  *
7488  * Return:      0 on success, otherwise error
7489  */
7490 int smb2_ioctl(struct ksmbd_work *work)
7491 {
7492         struct smb2_ioctl_req *req;
7493         struct smb2_ioctl_rsp *rsp, *rsp_org;
7494         unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7495         u64 id = KSMBD_NO_FID;
7496         struct ksmbd_conn *conn = work->conn;
7497         int ret = 0;
7498
7499         rsp_org = work->response_buf;
7500         if (work->next_smb2_rcv_hdr_off) {
7501                 req = ksmbd_req_buf_next(work);
7502                 rsp = ksmbd_resp_buf_next(work);
7503                 if (!has_file_id(le64_to_cpu(req->VolatileFileId))) {
7504                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7505                                     work->compound_fid);
7506                         id = work->compound_fid;
7507                 }
7508         } else {
7509                 req = work->request_buf;
7510                 rsp = work->response_buf;
7511         }
7512
7513         if (!has_file_id(id))
7514                 id = le64_to_cpu(req->VolatileFileId);
7515
7516         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7517                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7518                 goto out;
7519         }
7520
7521         cnt_code = le32_to_cpu(req->CntCode);
7522         ret = smb2_calc_max_out_buf_len(work, 48,
7523                                         le32_to_cpu(req->MaxOutputResponse));
7524         if (ret < 0) {
7525                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7526                 goto out;
7527         }
7528         out_buf_len = (unsigned int)ret;
7529         in_buf_len = le32_to_cpu(req->InputCount);
7530
7531         switch (cnt_code) {
7532         case FSCTL_DFS_GET_REFERRALS:
7533         case FSCTL_DFS_GET_REFERRALS_EX:
7534                 /* Not support DFS yet */
7535                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7536                 goto out;
7537         case FSCTL_CREATE_OR_GET_OBJECT_ID:
7538         {
7539                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7540
7541                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7542                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7543                         &rsp->Buffer[0];
7544
7545                 /*
7546                  * TODO: This is dummy implementation to pass smbtorture
7547                  * Need to check correct response later
7548                  */
7549                 memset(obj_buf->ObjectId, 0x0, 16);
7550                 memset(obj_buf->BirthVolumeId, 0x0, 16);
7551                 memset(obj_buf->BirthObjectId, 0x0, 16);
7552                 memset(obj_buf->DomainId, 0x0, 16);
7553
7554                 break;
7555         }
7556         case FSCTL_PIPE_TRANSCEIVE:
7557                 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7558                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7559                 break;
7560         case FSCTL_VALIDATE_NEGOTIATE_INFO:
7561                 if (conn->dialect < SMB30_PROT_ID) {
7562                         ret = -EOPNOTSUPP;
7563                         goto out;
7564                 }
7565
7566                 if (in_buf_len < sizeof(struct validate_negotiate_info_req))
7567                         return -EINVAL;
7568
7569                 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp))
7570                         return -EINVAL;
7571
7572                 ret = fsctl_validate_negotiate_info(conn,
7573                         (struct validate_negotiate_info_req *)&req->Buffer[0],
7574                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7575                         in_buf_len);
7576                 if (ret < 0)
7577                         goto out;
7578
7579                 nbytes = sizeof(struct validate_negotiate_info_rsp);
7580                 rsp->PersistentFileId = cpu_to_le64(SMB2_NO_FID);
7581                 rsp->VolatileFileId = cpu_to_le64(SMB2_NO_FID);
7582                 break;
7583         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7584                 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7585                 if (ret < 0)
7586                         goto out;
7587                 nbytes = ret;
7588                 break;
7589         case FSCTL_REQUEST_RESUME_KEY:
7590                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7591                         ret = -EINVAL;
7592                         goto out;
7593                 }
7594
7595                 ret = fsctl_request_resume_key(work, req,
7596                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7597                 if (ret < 0)
7598                         goto out;
7599                 rsp->PersistentFileId = req->PersistentFileId;
7600                 rsp->VolatileFileId = req->VolatileFileId;
7601                 nbytes = sizeof(struct resume_key_ioctl_rsp);
7602                 break;
7603         case FSCTL_COPYCHUNK:
7604         case FSCTL_COPYCHUNK_WRITE:
7605                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7606                         ksmbd_debug(SMB,
7607                                     "User does not have write permission\n");
7608                         ret = -EACCES;
7609                         goto out;
7610                 }
7611
7612                 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7613                         ret = -EINVAL;
7614                         goto out;
7615                 }
7616
7617                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7618                         ret = -EINVAL;
7619                         goto out;
7620                 }
7621
7622                 nbytes = sizeof(struct copychunk_ioctl_rsp);
7623                 rsp->VolatileFileId = req->VolatileFileId;
7624                 rsp->PersistentFileId = req->PersistentFileId;
7625                 fsctl_copychunk(work,
7626                                 (struct copychunk_ioctl_req *)&req->Buffer[0],
7627                                 le32_to_cpu(req->CntCode),
7628                                 le32_to_cpu(req->InputCount),
7629                                 le64_to_cpu(req->VolatileFileId),
7630                                 le64_to_cpu(req->PersistentFileId),
7631                                 rsp);
7632                 break;
7633         case FSCTL_SET_SPARSE:
7634                 if (in_buf_len < sizeof(struct file_sparse)) {
7635                         ret = -EINVAL;
7636                         goto out;
7637                 }
7638
7639                 ret = fsctl_set_sparse(work, id,
7640                                        (struct file_sparse *)&req->Buffer[0]);
7641                 if (ret < 0)
7642                         goto out;
7643                 break;
7644         case FSCTL_SET_ZERO_DATA:
7645         {
7646                 struct file_zero_data_information *zero_data;
7647                 struct ksmbd_file *fp;
7648                 loff_t off, len;
7649
7650                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7651                         ksmbd_debug(SMB,
7652                                     "User does not have write permission\n");
7653                         ret = -EACCES;
7654                         goto out;
7655                 }
7656
7657                 if (in_buf_len < sizeof(struct file_zero_data_information)) {
7658                         ret = -EINVAL;
7659                         goto out;
7660                 }
7661
7662                 zero_data =
7663                         (struct file_zero_data_information *)&req->Buffer[0];
7664
7665                 fp = ksmbd_lookup_fd_fast(work, id);
7666                 if (!fp) {
7667                         ret = -ENOENT;
7668                         goto out;
7669                 }
7670
7671                 off = le64_to_cpu(zero_data->FileOffset);
7672                 len = le64_to_cpu(zero_data->BeyondFinalZero) - off;
7673
7674                 ret = ksmbd_vfs_zero_data(work, fp, off, len);
7675                 ksmbd_fd_put(work, fp);
7676                 if (ret < 0)
7677                         goto out;
7678                 break;
7679         }
7680         case FSCTL_QUERY_ALLOCATED_RANGES:
7681                 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7682                         ret = -EINVAL;
7683                         goto out;
7684                 }
7685
7686                 ret = fsctl_query_allocated_ranges(work, id,
7687                         (struct file_allocated_range_buffer *)&req->Buffer[0],
7688                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7689                         out_buf_len /
7690                         sizeof(struct file_allocated_range_buffer), &nbytes);
7691                 if (ret == -E2BIG) {
7692                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7693                 } else if (ret < 0) {
7694                         nbytes = 0;
7695                         goto out;
7696                 }
7697
7698                 nbytes *= sizeof(struct file_allocated_range_buffer);
7699                 break;
7700         case FSCTL_GET_REPARSE_POINT:
7701         {
7702                 struct reparse_data_buffer *reparse_ptr;
7703                 struct ksmbd_file *fp;
7704
7705                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7706                 fp = ksmbd_lookup_fd_fast(work, id);
7707                 if (!fp) {
7708                         pr_err("not found fp!!\n");
7709                         ret = -ENOENT;
7710                         goto out;
7711                 }
7712
7713                 reparse_ptr->ReparseTag =
7714                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7715                 reparse_ptr->ReparseDataLength = 0;
7716                 ksmbd_fd_put(work, fp);
7717                 nbytes = sizeof(struct reparse_data_buffer);
7718                 break;
7719         }
7720         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7721         {
7722                 struct ksmbd_file *fp_in, *fp_out = NULL;
7723                 struct duplicate_extents_to_file *dup_ext;
7724                 loff_t src_off, dst_off, length, cloned;
7725
7726                 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7727                         ret = -EINVAL;
7728                         goto out;
7729                 }
7730
7731                 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7732
7733                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7734                                              dup_ext->PersistentFileHandle);
7735                 if (!fp_in) {
7736                         pr_err("not found file handle in duplicate extent to file\n");
7737                         ret = -ENOENT;
7738                         goto out;
7739                 }
7740
7741                 fp_out = ksmbd_lookup_fd_fast(work, id);
7742                 if (!fp_out) {
7743                         pr_err("not found fp\n");
7744                         ret = -ENOENT;
7745                         goto dup_ext_out;
7746                 }
7747
7748                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7749                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7750                 length = le64_to_cpu(dup_ext->ByteCount);
7751                 cloned = vfs_clone_file_range(fp_in->filp, src_off, fp_out->filp,
7752                                               dst_off, length, 0);
7753                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7754                         ret = -EOPNOTSUPP;
7755                         goto dup_ext_out;
7756                 } else if (cloned != length) {
7757                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
7758                                                      fp_out->filp, dst_off, length, 0);
7759                         if (cloned != length) {
7760                                 if (cloned < 0)
7761                                         ret = cloned;
7762                                 else
7763                                         ret = -EINVAL;
7764                         }
7765                 }
7766
7767 dup_ext_out:
7768                 ksmbd_fd_put(work, fp_in);
7769                 ksmbd_fd_put(work, fp_out);
7770                 if (ret < 0)
7771                         goto out;
7772                 break;
7773         }
7774         default:
7775                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7776                             cnt_code);
7777                 ret = -EOPNOTSUPP;
7778                 goto out;
7779         }
7780
7781         rsp->CntCode = cpu_to_le32(cnt_code);
7782         rsp->InputCount = cpu_to_le32(0);
7783         rsp->InputOffset = cpu_to_le32(112);
7784         rsp->OutputOffset = cpu_to_le32(112);
7785         rsp->OutputCount = cpu_to_le32(nbytes);
7786         rsp->StructureSize = cpu_to_le16(49);
7787         rsp->Reserved = cpu_to_le16(0);
7788         rsp->Flags = cpu_to_le32(0);
7789         rsp->Reserved2 = cpu_to_le32(0);
7790         inc_rfc1001_len(rsp_org, 48 + nbytes);
7791
7792         return 0;
7793
7794 out:
7795         if (ret == -EACCES)
7796                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7797         else if (ret == -ENOENT)
7798                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7799         else if (ret == -EOPNOTSUPP)
7800                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7801         else if (ret == -ENOSPC)
7802                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7803         else if (ret < 0 || rsp->hdr.Status == 0)
7804                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7805         smb2_set_err_rsp(work);
7806         return 0;
7807 }
7808
7809 /**
7810  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7811  * @work:       smb work containing oplock break command buffer
7812  *
7813  * Return:      0
7814  */
7815 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7816 {
7817         struct smb2_oplock_break *req = work->request_buf;
7818         struct smb2_oplock_break *rsp = work->response_buf;
7819         struct ksmbd_file *fp;
7820         struct oplock_info *opinfo = NULL;
7821         __le32 err = 0;
7822         int ret = 0;
7823         u64 volatile_id, persistent_id;
7824         char req_oplevel = 0, rsp_oplevel = 0;
7825         unsigned int oplock_change_type;
7826
7827         volatile_id = le64_to_cpu(req->VolatileFid);
7828         persistent_id = le64_to_cpu(req->PersistentFid);
7829         req_oplevel = req->OplockLevel;
7830         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7831                     volatile_id, persistent_id, req_oplevel);
7832
7833         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7834         if (!fp) {
7835                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7836                 smb2_set_err_rsp(work);
7837                 return;
7838         }
7839
7840         opinfo = opinfo_get(fp);
7841         if (!opinfo) {
7842                 pr_err("unexpected null oplock_info\n");
7843                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7844                 smb2_set_err_rsp(work);
7845                 ksmbd_fd_put(work, fp);
7846                 return;
7847         }
7848
7849         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
7850                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7851                 goto err_out;
7852         }
7853
7854         if (opinfo->op_state == OPLOCK_STATE_NONE) {
7855                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
7856                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7857                 goto err_out;
7858         }
7859
7860         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7861              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7862             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
7863              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
7864                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7865                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
7866         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7867                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
7868                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7869                 oplock_change_type = OPLOCK_READ_TO_NONE;
7870         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
7871                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7872                 err = STATUS_INVALID_DEVICE_STATE;
7873                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7874                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7875                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
7876                         oplock_change_type = OPLOCK_WRITE_TO_READ;
7877                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7878                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7879                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7880                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
7881                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7882                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7883                         oplock_change_type = OPLOCK_READ_TO_NONE;
7884                 } else {
7885                         oplock_change_type = 0;
7886                 }
7887         } else {
7888                 oplock_change_type = 0;
7889         }
7890
7891         switch (oplock_change_type) {
7892         case OPLOCK_WRITE_TO_READ:
7893                 ret = opinfo_write_to_read(opinfo);
7894                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
7895                 break;
7896         case OPLOCK_WRITE_TO_NONE:
7897                 ret = opinfo_write_to_none(opinfo);
7898                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
7899                 break;
7900         case OPLOCK_READ_TO_NONE:
7901                 ret = opinfo_read_to_none(opinfo);
7902                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
7903                 break;
7904         default:
7905                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
7906                        opinfo->level, rsp_oplevel);
7907         }
7908
7909         if (ret < 0) {
7910                 rsp->hdr.Status = err;
7911                 goto err_out;
7912         }
7913
7914         opinfo_put(opinfo);
7915         ksmbd_fd_put(work, fp);
7916         opinfo->op_state = OPLOCK_STATE_NONE;
7917         wake_up_interruptible_all(&opinfo->oplock_q);
7918
7919         rsp->StructureSize = cpu_to_le16(24);
7920         rsp->OplockLevel = rsp_oplevel;
7921         rsp->Reserved = 0;
7922         rsp->Reserved2 = 0;
7923         rsp->VolatileFid = cpu_to_le64(volatile_id);
7924         rsp->PersistentFid = cpu_to_le64(persistent_id);
7925         inc_rfc1001_len(rsp, 24);
7926         return;
7927
7928 err_out:
7929         opinfo->op_state = OPLOCK_STATE_NONE;
7930         wake_up_interruptible_all(&opinfo->oplock_q);
7931
7932         opinfo_put(opinfo);
7933         ksmbd_fd_put(work, fp);
7934         smb2_set_err_rsp(work);
7935 }
7936
7937 static int check_lease_state(struct lease *lease, __le32 req_state)
7938 {
7939         if ((lease->new_state ==
7940              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
7941             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
7942                 lease->new_state = req_state;
7943                 return 0;
7944         }
7945
7946         if (lease->new_state == req_state)
7947                 return 0;
7948
7949         return 1;
7950 }
7951
7952 /**
7953  * smb21_lease_break_ack() - handler for smb2.1 lease break command
7954  * @work:       smb work containing lease break command buffer
7955  *
7956  * Return:      0
7957  */
7958 static void smb21_lease_break_ack(struct ksmbd_work *work)
7959 {
7960         struct ksmbd_conn *conn = work->conn;
7961         struct smb2_lease_ack *req = work->request_buf;
7962         struct smb2_lease_ack *rsp = work->response_buf;
7963         struct oplock_info *opinfo;
7964         __le32 err = 0;
7965         int ret = 0;
7966         unsigned int lease_change_type;
7967         __le32 lease_state;
7968         struct lease *lease;
7969
7970         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
7971                     le32_to_cpu(req->LeaseState));
7972         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
7973         if (!opinfo) {
7974                 ksmbd_debug(OPLOCK, "file not opened\n");
7975                 smb2_set_err_rsp(work);
7976                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7977                 return;
7978         }
7979         lease = opinfo->o_lease;
7980
7981         if (opinfo->op_state == OPLOCK_STATE_NONE) {
7982                 pr_err("unexpected lease break state 0x%x\n",
7983                        opinfo->op_state);
7984                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7985                 goto err_out;
7986         }
7987
7988         if (check_lease_state(lease, req->LeaseState)) {
7989                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
7990                 ksmbd_debug(OPLOCK,
7991                             "req lease state: 0x%x, expected state: 0x%x\n",
7992                             req->LeaseState, lease->new_state);
7993                 goto err_out;
7994         }
7995
7996         if (!atomic_read(&opinfo->breaking_cnt)) {
7997                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7998                 goto err_out;
7999         }
8000
8001         /* check for bad lease state */
8002         if (req->LeaseState &
8003             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8004                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8005                 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8006                         lease_change_type = OPLOCK_WRITE_TO_NONE;
8007                 else
8008                         lease_change_type = OPLOCK_READ_TO_NONE;
8009                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8010                             le32_to_cpu(lease->state),
8011                             le32_to_cpu(req->LeaseState));
8012         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8013                    req->LeaseState != SMB2_LEASE_NONE_LE) {
8014                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8015                 lease_change_type = OPLOCK_READ_TO_NONE;
8016                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8017                             le32_to_cpu(lease->state),
8018                             le32_to_cpu(req->LeaseState));
8019         } else {
8020                 /* valid lease state changes */
8021                 err = STATUS_INVALID_DEVICE_STATE;
8022                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8023                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8024                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
8025                         else
8026                                 lease_change_type = OPLOCK_READ_TO_NONE;
8027                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8028                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8029                                 lease_change_type = OPLOCK_WRITE_TO_READ;
8030                         else
8031                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8032                 } else {
8033                         lease_change_type = 0;
8034                 }
8035         }
8036
8037         switch (lease_change_type) {
8038         case OPLOCK_WRITE_TO_READ:
8039                 ret = opinfo_write_to_read(opinfo);
8040                 break;
8041         case OPLOCK_READ_HANDLE_TO_READ:
8042                 ret = opinfo_read_handle_to_read(opinfo);
8043                 break;
8044         case OPLOCK_WRITE_TO_NONE:
8045                 ret = opinfo_write_to_none(opinfo);
8046                 break;
8047         case OPLOCK_READ_TO_NONE:
8048                 ret = opinfo_read_to_none(opinfo);
8049                 break;
8050         default:
8051                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8052                             le32_to_cpu(lease->state),
8053                             le32_to_cpu(req->LeaseState));
8054         }
8055
8056         lease_state = lease->state;
8057         opinfo->op_state = OPLOCK_STATE_NONE;
8058         wake_up_interruptible_all(&opinfo->oplock_q);
8059         atomic_dec(&opinfo->breaking_cnt);
8060         wake_up_interruptible_all(&opinfo->oplock_brk);
8061         opinfo_put(opinfo);
8062
8063         if (ret < 0) {
8064                 rsp->hdr.Status = err;
8065                 goto err_out;
8066         }
8067
8068         rsp->StructureSize = cpu_to_le16(36);
8069         rsp->Reserved = 0;
8070         rsp->Flags = 0;
8071         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8072         rsp->LeaseState = lease_state;
8073         rsp->LeaseDuration = 0;
8074         inc_rfc1001_len(rsp, 36);
8075         return;
8076
8077 err_out:
8078         opinfo->op_state = OPLOCK_STATE_NONE;
8079         wake_up_interruptible_all(&opinfo->oplock_q);
8080         atomic_dec(&opinfo->breaking_cnt);
8081         wake_up_interruptible_all(&opinfo->oplock_brk);
8082
8083         opinfo_put(opinfo);
8084         smb2_set_err_rsp(work);
8085 }
8086
8087 /**
8088  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8089  * @work:       smb work containing oplock/lease break command buffer
8090  *
8091  * Return:      0
8092  */
8093 int smb2_oplock_break(struct ksmbd_work *work)
8094 {
8095         struct smb2_oplock_break *req = work->request_buf;
8096         struct smb2_oplock_break *rsp = work->response_buf;
8097
8098         switch (le16_to_cpu(req->StructureSize)) {
8099         case OP_BREAK_STRUCT_SIZE_20:
8100                 smb20_oplock_break_ack(work);
8101                 break;
8102         case OP_BREAK_STRUCT_SIZE_21:
8103                 smb21_lease_break_ack(work);
8104                 break;
8105         default:
8106                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8107                             le16_to_cpu(req->StructureSize));
8108                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8109                 smb2_set_err_rsp(work);
8110         }
8111
8112         return 0;
8113 }
8114
8115 /**
8116  * smb2_notify() - handler for smb2 notify request
8117  * @work:   smb work containing notify command buffer
8118  *
8119  * Return:      0
8120  */
8121 int smb2_notify(struct ksmbd_work *work)
8122 {
8123         struct smb2_notify_req *req;
8124         struct smb2_notify_rsp *rsp;
8125
8126         WORK_BUFFERS(work, req, rsp);
8127
8128         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8129                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8130                 smb2_set_err_rsp(work);
8131                 return 0;
8132         }
8133
8134         smb2_set_err_rsp(work);
8135         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8136         return 0;
8137 }
8138
8139 /**
8140  * smb2_is_sign_req() - handler for checking packet signing status
8141  * @work:       smb work containing notify command buffer
8142  * @command:    SMB2 command id
8143  *
8144  * Return:      true if packed is signed, false otherwise
8145  */
8146 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8147 {
8148         struct smb2_hdr *rcv_hdr2 = work->request_buf;
8149
8150         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8151             command != SMB2_NEGOTIATE_HE &&
8152             command != SMB2_SESSION_SETUP_HE &&
8153             command != SMB2_OPLOCK_BREAK_HE)
8154                 return true;
8155
8156         return false;
8157 }
8158
8159 /**
8160  * smb2_check_sign_req() - handler for req packet sign processing
8161  * @work:   smb work containing notify command buffer
8162  *
8163  * Return:      1 on success, 0 otherwise
8164  */
8165 int smb2_check_sign_req(struct ksmbd_work *work)
8166 {
8167         struct smb2_hdr *hdr, *hdr_org;
8168         char signature_req[SMB2_SIGNATURE_SIZE];
8169         char signature[SMB2_HMACSHA256_SIZE];
8170         struct kvec iov[1];
8171         size_t len;
8172
8173         hdr_org = hdr = work->request_buf;
8174         if (work->next_smb2_rcv_hdr_off)
8175                 hdr = ksmbd_req_buf_next(work);
8176
8177         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8178                 len = be32_to_cpu(hdr_org->smb2_buf_length);
8179         else if (hdr->NextCommand)
8180                 len = le32_to_cpu(hdr->NextCommand);
8181         else
8182                 len = be32_to_cpu(hdr_org->smb2_buf_length) -
8183                         work->next_smb2_rcv_hdr_off;
8184
8185         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8186         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8187
8188         iov[0].iov_base = (char *)&hdr->ProtocolId;
8189         iov[0].iov_len = len;
8190
8191         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8192                                 signature))
8193                 return 0;
8194
8195         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8196                 pr_err("bad smb2 signature\n");
8197                 return 0;
8198         }
8199
8200         return 1;
8201 }
8202
8203 /**
8204  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8205  * @work:   smb work containing notify command buffer
8206  *
8207  */
8208 void smb2_set_sign_rsp(struct ksmbd_work *work)
8209 {
8210         struct smb2_hdr *hdr, *hdr_org;
8211         struct smb2_hdr *req_hdr;
8212         char signature[SMB2_HMACSHA256_SIZE];
8213         struct kvec iov[2];
8214         size_t len;
8215         int n_vec = 1;
8216
8217         hdr_org = hdr = work->response_buf;
8218         if (work->next_smb2_rsp_hdr_off)
8219                 hdr = ksmbd_resp_buf_next(work);
8220
8221         req_hdr = ksmbd_req_buf_next(work);
8222
8223         if (!work->next_smb2_rsp_hdr_off) {
8224                 len = get_rfc1002_len(hdr_org);
8225                 if (req_hdr->NextCommand)
8226                         len = ALIGN(len, 8);
8227         } else {
8228                 len = get_rfc1002_len(hdr_org) - work->next_smb2_rsp_hdr_off;
8229                 len = ALIGN(len, 8);
8230         }
8231
8232         if (req_hdr->NextCommand)
8233                 hdr->NextCommand = cpu_to_le32(len);
8234
8235         hdr->Flags |= SMB2_FLAGS_SIGNED;
8236         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8237
8238         iov[0].iov_base = (char *)&hdr->ProtocolId;
8239         iov[0].iov_len = len;
8240
8241         if (work->aux_payload_sz) {
8242                 iov[0].iov_len -= work->aux_payload_sz;
8243
8244                 iov[1].iov_base = work->aux_payload_buf;
8245                 iov[1].iov_len = work->aux_payload_sz;
8246                 n_vec++;
8247         }
8248
8249         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8250                                  signature))
8251                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8252 }
8253
8254 /**
8255  * smb3_check_sign_req() - handler for req packet sign processing
8256  * @work:   smb work containing notify command buffer
8257  *
8258  * Return:      1 on success, 0 otherwise
8259  */
8260 int smb3_check_sign_req(struct ksmbd_work *work)
8261 {
8262         struct ksmbd_conn *conn = work->conn;
8263         char *signing_key;
8264         struct smb2_hdr *hdr, *hdr_org;
8265         struct channel *chann;
8266         char signature_req[SMB2_SIGNATURE_SIZE];
8267         char signature[SMB2_CMACAES_SIZE];
8268         struct kvec iov[1];
8269         size_t len;
8270
8271         hdr_org = hdr = work->request_buf;
8272         if (work->next_smb2_rcv_hdr_off)
8273                 hdr = ksmbd_req_buf_next(work);
8274
8275         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8276                 len = be32_to_cpu(hdr_org->smb2_buf_length);
8277         else if (hdr->NextCommand)
8278                 len = le32_to_cpu(hdr->NextCommand);
8279         else
8280                 len = be32_to_cpu(hdr_org->smb2_buf_length) -
8281                         work->next_smb2_rcv_hdr_off;
8282
8283         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8284                 signing_key = work->sess->smb3signingkey;
8285         } else {
8286                 chann = lookup_chann_list(work->sess, conn);
8287                 if (!chann)
8288                         return 0;
8289                 signing_key = chann->smb3signingkey;
8290         }
8291
8292         if (!signing_key) {
8293                 pr_err("SMB3 signing key is not generated\n");
8294                 return 0;
8295         }
8296
8297         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8298         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8299         iov[0].iov_base = (char *)&hdr->ProtocolId;
8300         iov[0].iov_len = len;
8301
8302         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8303                 return 0;
8304
8305         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8306                 pr_err("bad smb2 signature\n");
8307                 return 0;
8308         }
8309
8310         return 1;
8311 }
8312
8313 /**
8314  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8315  * @work:   smb work containing notify command buffer
8316  *
8317  */
8318 void smb3_set_sign_rsp(struct ksmbd_work *work)
8319 {
8320         struct ksmbd_conn *conn = work->conn;
8321         struct smb2_hdr *req_hdr;
8322         struct smb2_hdr *hdr, *hdr_org;
8323         struct channel *chann;
8324         char signature[SMB2_CMACAES_SIZE];
8325         struct kvec iov[2];
8326         int n_vec = 1;
8327         size_t len;
8328         char *signing_key;
8329
8330         hdr_org = hdr = work->response_buf;
8331         if (work->next_smb2_rsp_hdr_off)
8332                 hdr = ksmbd_resp_buf_next(work);
8333
8334         req_hdr = ksmbd_req_buf_next(work);
8335
8336         if (!work->next_smb2_rsp_hdr_off) {
8337                 len = get_rfc1002_len(hdr_org);
8338                 if (req_hdr->NextCommand)
8339                         len = ALIGN(len, 8);
8340         } else {
8341                 len = get_rfc1002_len(hdr_org) - work->next_smb2_rsp_hdr_off;
8342                 len = ALIGN(len, 8);
8343         }
8344
8345         if (conn->binding == false &&
8346             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8347                 signing_key = work->sess->smb3signingkey;
8348         } else {
8349                 chann = lookup_chann_list(work->sess, work->conn);
8350                 if (!chann)
8351                         return;
8352                 signing_key = chann->smb3signingkey;
8353         }
8354
8355         if (!signing_key)
8356                 return;
8357
8358         if (req_hdr->NextCommand)
8359                 hdr->NextCommand = cpu_to_le32(len);
8360
8361         hdr->Flags |= SMB2_FLAGS_SIGNED;
8362         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8363         iov[0].iov_base = (char *)&hdr->ProtocolId;
8364         iov[0].iov_len = len;
8365         if (work->aux_payload_sz) {
8366                 iov[0].iov_len -= work->aux_payload_sz;
8367                 iov[1].iov_base = work->aux_payload_buf;
8368                 iov[1].iov_len = work->aux_payload_sz;
8369                 n_vec++;
8370         }
8371
8372         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature))
8373                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8374 }
8375
8376 /**
8377  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8378  * @work:   smb work containing response buffer
8379  *
8380  */
8381 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8382 {
8383         struct ksmbd_conn *conn = work->conn;
8384         struct ksmbd_session *sess = work->sess;
8385         struct smb2_hdr *req, *rsp;
8386
8387         if (conn->dialect != SMB311_PROT_ID)
8388                 return;
8389
8390         WORK_BUFFERS(work, req, rsp);
8391
8392         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8393             conn->preauth_info)
8394                 ksmbd_gen_preauth_integrity_hash(conn, (char *)rsp,
8395                                                  conn->preauth_info->Preauth_HashValue);
8396
8397         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8398                 __u8 *hash_value;
8399
8400                 if (conn->binding) {
8401                         struct preauth_session *preauth_sess;
8402
8403                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8404                         if (!preauth_sess)
8405                                 return;
8406                         hash_value = preauth_sess->Preauth_HashValue;
8407                 } else {
8408                         hash_value = sess->Preauth_HashValue;
8409                         if (!hash_value)
8410                                 return;
8411                 }
8412                 ksmbd_gen_preauth_integrity_hash(conn, (char *)rsp,
8413                                                  hash_value);
8414         }
8415 }
8416
8417 static void fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, char *old_buf,
8418                                __le16 cipher_type)
8419 {
8420         struct smb2_hdr *hdr = (struct smb2_hdr *)old_buf;
8421         unsigned int orig_len = get_rfc1002_len(old_buf);
8422
8423         memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
8424         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8425         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8426         tr_hdr->Flags = cpu_to_le16(0x01);
8427         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8428             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8429                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8430         else
8431                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8432         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8433         inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
8434         inc_rfc1001_len(tr_hdr, orig_len);
8435 }
8436
8437 int smb3_encrypt_resp(struct ksmbd_work *work)
8438 {
8439         char *buf = work->response_buf;
8440         struct smb2_transform_hdr *tr_hdr;
8441         struct kvec iov[3];
8442         int rc = -ENOMEM;
8443         int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0);
8444
8445         if (ARRAY_SIZE(iov) < rq_nvec)
8446                 return -ENOMEM;
8447
8448         tr_hdr = kzalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
8449         if (!tr_hdr)
8450                 return rc;
8451
8452         /* fill transform header */
8453         fill_transform_hdr(tr_hdr, buf, work->conn->cipher_type);
8454
8455         iov[0].iov_base = tr_hdr;
8456         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
8457         buf_size += iov[0].iov_len - 4;
8458
8459         iov[1].iov_base = buf + 4;
8460         iov[1].iov_len = get_rfc1002_len(buf);
8461         if (work->aux_payload_sz) {
8462                 iov[1].iov_len = work->resp_hdr_sz - 4;
8463
8464                 iov[2].iov_base = work->aux_payload_buf;
8465                 iov[2].iov_len = work->aux_payload_sz;
8466                 buf_size += iov[2].iov_len;
8467         }
8468         buf_size += iov[1].iov_len;
8469         work->resp_hdr_sz = iov[1].iov_len;
8470
8471         rc = ksmbd_crypt_message(work->conn, iov, rq_nvec, 1);
8472         if (rc)
8473                 return rc;
8474
8475         memmove(buf, iov[1].iov_base, iov[1].iov_len);
8476         tr_hdr->smb2_buf_length = cpu_to_be32(buf_size);
8477         work->tr_buf = tr_hdr;
8478
8479         return rc;
8480 }
8481
8482 bool smb3_is_transform_hdr(void *buf)
8483 {
8484         struct smb2_transform_hdr *trhdr = buf;
8485
8486         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8487 }
8488
8489 int smb3_decrypt_req(struct ksmbd_work *work)
8490 {
8491         struct ksmbd_conn *conn = work->conn;
8492         struct ksmbd_session *sess;
8493         char *buf = work->request_buf;
8494         struct smb2_hdr *hdr;
8495         unsigned int pdu_length = get_rfc1002_len(buf);
8496         struct kvec iov[2];
8497         int buf_data_size = pdu_length + 4 -
8498                 sizeof(struct smb2_transform_hdr);
8499         struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
8500         int rc = 0;
8501
8502         if (buf_data_size < sizeof(struct smb2_hdr)) {
8503                 pr_err("Transform message is too small (%u)\n",
8504                        pdu_length);
8505                 return -ECONNABORTED;
8506         }
8507
8508         if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8509                 pr_err("Transform message is broken\n");
8510                 return -ECONNABORTED;
8511         }
8512
8513         sess = ksmbd_session_lookup_all(conn, le64_to_cpu(tr_hdr->SessionId));
8514         if (!sess) {
8515                 pr_err("invalid session id(%llx) in transform header\n",
8516                        le64_to_cpu(tr_hdr->SessionId));
8517                 return -ECONNABORTED;
8518         }
8519
8520         iov[0].iov_base = buf;
8521         iov[0].iov_len = sizeof(struct smb2_transform_hdr);
8522         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
8523         iov[1].iov_len = buf_data_size;
8524         rc = ksmbd_crypt_message(conn, iov, 2, 0);
8525         if (rc)
8526                 return rc;
8527
8528         memmove(buf + 4, iov[1].iov_base, buf_data_size);
8529         hdr = (struct smb2_hdr *)buf;
8530         hdr->smb2_buf_length = cpu_to_be32(buf_data_size);
8531
8532         return rc;
8533 }
8534
8535 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8536 {
8537         struct ksmbd_conn *conn = work->conn;
8538         struct smb2_hdr *rsp = work->response_buf;
8539
8540         if (conn->dialect < SMB30_PROT_ID)
8541                 return false;
8542
8543         if (work->next_smb2_rcv_hdr_off)
8544                 rsp = ksmbd_resp_buf_next(work);
8545
8546         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8547             rsp->Status == STATUS_SUCCESS)
8548                 return true;
8549         return false;
8550 }