fs/smb/server/smb2pdu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
   4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
   5  */
   6
   7 #include <linux/inetdevice.h>
   8 #include <net/addrconf.h>
   9 #include <linux/syscalls.h>
  10 #include <linux/namei.h>
  11 #include <linux/statfs.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/falloc.h>
  14 #include <linux/mount.h>
  15 #include <linux/filelock.h>
  16
  17 #include "glob.h"
  18 #include "smbfsctl.h"
  19 #include "oplock.h"
  20 #include "smbacl.h"
  21
  22 #include "auth.h"
  23 #include "asn1.h"
  24 #include "connection.h"
  25 #include "transport_ipc.h"
  26 #include "transport_rdma.h"
  27 #include "vfs.h"
  28 #include "vfs_cache.h"
  29 #include "misc.h"
  30
  31 #include "server.h"
  32 #include "smb_common.h"
  33 #include "smbstatus.h"
  34 #include "ksmbd_work.h"
  35 #include "mgmt/user_config.h"
  36 #include "mgmt/share_config.h"
  37 #include "mgmt/tree_connect.h"
  38 #include "mgmt/user_session.h"
  39 #include "mgmt/ksmbd_ida.h"
  40 #include "ndr.h"
  41
  42 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
  43 {
  44         if (work->next_smb2_rcv_hdr_off) {
  45                 *req = ksmbd_req_buf_next(work);
  46                 *rsp = ksmbd_resp_buf_next(work);
  47         } else {
  48                 *req = smb2_get_msg(work->request_buf);
  49                 *rsp = smb2_get_msg(work->response_buf);
  50         }
  51 }
  52
  53 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
  54
  55 /**
  56  * check_session_id() - check for valid session id in smb header
  57  * @conn:       connection instance
  58  * @id:         session id from smb header
  59  *
  60  * Return:      1 if valid session id, otherwise 0
  61  */
  62 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
  63 {
  64         struct ksmbd_session *sess;
  65
  66         if (id == 0 || id == -1)
  67                 return false;
  68
  69         sess = ksmbd_session_lookup_all(conn, id);
  70         if (sess)
  71                 return true;
  72         pr_err("Invalid user session id: %llu\n", id);
  73         return false;
  74 }
  75
  76 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
  77 {
  78         return xa_load(&sess->ksmbd_chann_list, (long)conn);
  79 }
  80
  81 /**
  82  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
  83  * @work:       smb work
  84  *
  85  * Return:      0 if there is a tree connection matched or these are
  86  *              skipable commands, otherwise error
  87  */
  88 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
  89 {
  90         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
  91         unsigned int cmd = le16_to_cpu(req_hdr->Command);
  92         unsigned int tree_id;
  93
  94         if (cmd == SMB2_TREE_CONNECT_HE ||
  95             cmd ==  SMB2_CANCEL_HE ||
  96             cmd ==  SMB2_LOGOFF_HE) {
  97                 ksmbd_debug(SMB, "skip to check tree connect request\n");
  98                 return 0;
  99         }
 100
 101         if (xa_empty(&work->sess->tree_conns)) {
 102                 ksmbd_debug(SMB, "NO tree connected\n");
 103                 return -ENOENT;
 104         }
 105
 106         tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
 107
 108         /*
 109          * If request is not the first in Compound request,
 110          * Just validate tree id in header with work->tcon->id.
 111          */
 112         if (work->next_smb2_rcv_hdr_off) {
 113                 if (!work->tcon) {
 114                         pr_err("The first operation in the compound does not have tcon\n");
 115                         return -EINVAL;
 116                 }
 117                 if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
 118                         pr_err("tree id(%u) is different with id(%u) in first operation\n",
 119                                         tree_id, work->tcon->id);
 120                         return -EINVAL;
 121                 }
 122                 return 1;
 123         }
 124
 125         work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
 126         if (!work->tcon) {
 127                 pr_err("Invalid tid %d\n", tree_id);
 128                 return -ENOENT;
 129         }
 130
 131         return 1;
 132 }
 133
 134 /**
 135  * smb2_set_err_rsp() - set error response code on smb response
 136  * @work:       smb work containing response buffer
 137  */
 138 void smb2_set_err_rsp(struct ksmbd_work *work)
 139 {
 140         struct smb2_err_rsp *err_rsp;
 141
 142         if (work->next_smb2_rcv_hdr_off)
 143                 err_rsp = ksmbd_resp_buf_next(work);
 144         else
 145                 err_rsp = smb2_get_msg(work->response_buf);
 146
 147         if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
 148                 int err;
 149
 150                 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
 151                 err_rsp->ErrorContextCount = 0;
 152                 err_rsp->Reserved = 0;
 153                 err_rsp->ByteCount = 0;
 154                 err_rsp->ErrorData[0] = 0;
 155                 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
 156                                         __SMB2_HEADER_STRUCTURE_SIZE +
 157                                                 SMB2_ERROR_STRUCTURE_SIZE2);
 158                 if (err)
 159                         work->send_no_response = 1;
 160         }
 161 }
 162
 163 /**
 164  * is_smb2_neg_cmd() - is it smb2 negotiation command
 165  * @work:       smb work containing smb header
 166  *
 167  * Return:      true if smb2 negotiation command, otherwise false
 168  */
 169 bool is_smb2_neg_cmd(struct ksmbd_work *work)
 170 {
 171         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 172
 173         /* is it SMB2 header ? */
 174         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 175                 return false;
 176
 177         /* make sure it is request not response message */
 178         if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
 179                 return false;
 180
 181         if (hdr->Command != SMB2_NEGOTIATE)
 182                 return false;
 183
 184         return true;
 185 }
 186
 187 /**
 188  * is_smb2_rsp() - is it smb2 response
 189  * @work:       smb work containing smb response buffer
 190  *
 191  * Return:      true if smb2 response, otherwise false
 192  */
 193 bool is_smb2_rsp(struct ksmbd_work *work)
 194 {
 195         struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
 196
 197         /* is it SMB2 header ? */
 198         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 199                 return false;
 200
 201         /* make sure it is response not request message */
 202         if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
 203                 return false;
 204
 205         return true;
 206 }
 207
 208 /**
 209  * get_smb2_cmd_val() - get smb command code from smb header
 210  * @work:       smb work containing smb request buffer
 211  *
 212  * Return:      smb2 request command value
 213  */
 214 u16 get_smb2_cmd_val(struct ksmbd_work *work)
 215 {
 216         struct smb2_hdr *rcv_hdr;
 217
 218         if (work->next_smb2_rcv_hdr_off)
 219                 rcv_hdr = ksmbd_req_buf_next(work);
 220         else
 221                 rcv_hdr = smb2_get_msg(work->request_buf);
 222         return le16_to_cpu(rcv_hdr->Command);
 223 }
 224
 225 /**
 226  * set_smb2_rsp_status() - set error response code on smb2 header
 227  * @work:       smb work containing response buffer
 228  * @err:        error response code
 229  */
 230 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
 231 {
 232         struct smb2_hdr *rsp_hdr;
 233
 234         rsp_hdr = smb2_get_msg(work->response_buf);
 235         rsp_hdr->Status = err;
 236
 237         work->iov_idx = 0;
 238         work->iov_cnt = 0;
 239         work->next_smb2_rcv_hdr_off = 0;
 240         smb2_set_err_rsp(work);
 241 }
 242
 243 /**
 244  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
 245  * @work:       smb work containing smb request buffer
 246  *
 247  * smb2 negotiate response is sent in reply of smb1 negotiate command for
 248  * dialect auto-negotiation.
 249  */
 250 int init_smb2_neg_rsp(struct ksmbd_work *work)
 251 {
 252         struct smb2_hdr *rsp_hdr;
 253         struct smb2_negotiate_rsp *rsp;
 254         struct ksmbd_conn *conn = work->conn;
 255         int err;
 256
 257         rsp_hdr = smb2_get_msg(work->response_buf);
 258         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 259         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 260         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 261         rsp_hdr->CreditRequest = cpu_to_le16(2);
 262         rsp_hdr->Command = SMB2_NEGOTIATE;
 263         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 264         rsp_hdr->NextCommand = 0;
 265         rsp_hdr->MessageId = 0;
 266         rsp_hdr->Id.SyncId.ProcessId = 0;
 267         rsp_hdr->Id.SyncId.TreeId = 0;
 268         rsp_hdr->SessionId = 0;
 269         memset(rsp_hdr->Signature, 0, 16);
 270
 271         rsp = smb2_get_msg(work->response_buf);
 272
 273         WARN_ON(ksmbd_conn_good(conn));
 274
 275         rsp->StructureSize = cpu_to_le16(65);
 276         ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
 277         rsp->DialectRevision = cpu_to_le16(conn->dialect);
 278         /* Not setting conn guid rsp->ServerGUID, as it
 279          * not used by client for identifying connection
 280          */
 281         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
 282         /* Default Max Message Size till SMB2.0, 64K*/
 283         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
 284         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 285         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 286
 287         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
 288         rsp->ServerStartTime = 0;
 289
 290         rsp->SecurityBufferOffset = cpu_to_le16(128);
 291         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
 292         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
 293                 le16_to_cpu(rsp->SecurityBufferOffset));
 294         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
 295         if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
 296                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
 297         err = ksmbd_iov_pin_rsp(work, rsp,
 298                                 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
 299         if (err)
 300                 return err;
 301         conn->use_spnego = true;
 302
 303         ksmbd_conn_set_need_negotiate(conn);
 304         return 0;
 305 }
 306
 307 /**
 308  * smb2_set_rsp_credits() - set number of credits in response buffer
 309  * @work:       smb work containing smb response buffer
 310  */
 311 int smb2_set_rsp_credits(struct ksmbd_work *work)
 312 {
 313         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 314         struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
 315         struct ksmbd_conn *conn = work->conn;
 316         unsigned short credits_requested, aux_max;
 317         unsigned short credit_charge, credits_granted = 0;
 318
 319         if (work->send_no_response)
 320                 return 0;
 321
 322         hdr->CreditCharge = req_hdr->CreditCharge;
 323
 324         if (conn->total_credits > conn->vals->max_credits) {
 325                 hdr->CreditRequest = 0;
 326                 pr_err("Total credits overflow: %d\n", conn->total_credits);
 327                 return -EINVAL;
 328         }
 329
 330         credit_charge = max_t(unsigned short,
 331                               le16_to_cpu(req_hdr->CreditCharge), 1);
 332         if (credit_charge > conn->total_credits) {
 333                 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
 334                             credit_charge, conn->total_credits);
 335                 return -EINVAL;
 336         }
 337
 338         conn->total_credits -= credit_charge;
 339         conn->outstanding_credits -= credit_charge;
 340         credits_requested = max_t(unsigned short,
 341                                   le16_to_cpu(req_hdr->CreditRequest), 1);
 342
 343         /* according to smb2.credits smbtorture, Windows server
 344          * 2016 or later grant up to 8192 credits at once.
 345          *
 346          * TODO: Need to adjuct CreditRequest value according to
 347          * current cpu load
 348          */
 349         if (hdr->Command == SMB2_NEGOTIATE)
 350                 aux_max = 1;
 351         else
 352                 aux_max = conn->vals->max_credits - conn->total_credits;
 353         credits_granted = min_t(unsigned short, credits_requested, aux_max);
 354
 355         conn->total_credits += credits_granted;
 356         work->credits_granted += credits_granted;
 357
 358         if (!req_hdr->NextCommand) {
 359                 /* Update CreditRequest in last request */
 360                 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
 361         }
 362         ksmbd_debug(SMB,
 363                     "credits: requested[%d] granted[%d] total_granted[%d]\n",
 364                     credits_requested, credits_granted,
 365                     conn->total_credits);
 366         return 0;
 367 }
 368
 369 /**
 370  * init_chained_smb2_rsp() - initialize smb2 chained response
 371  * @work:       smb work containing smb response buffer
 372  */
 373 static void init_chained_smb2_rsp(struct ksmbd_work *work)
 374 {
 375         struct smb2_hdr *req = ksmbd_req_buf_next(work);
 376         struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
 377         struct smb2_hdr *rsp_hdr;
 378         struct smb2_hdr *rcv_hdr;
 379         int next_hdr_offset = 0;
 380         int len, new_len;
 381
 382         /* Len of this response = updated RFC len - offset of previous cmd
 383          * in the compound rsp
 384          */
 385
 386         /* Storing the current local FID which may be needed by subsequent
 387          * command in the compound request
 388          */
 389         if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
 390                 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
 391                 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
 392                 work->compound_sid = le64_to_cpu(rsp->SessionId);
 393         }
 394
 395         len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
 396         next_hdr_offset = le32_to_cpu(req->NextCommand);
 397
 398         new_len = ALIGN(len, 8);
 399         work->iov[work->iov_idx].iov_len += (new_len - len);
 400         inc_rfc1001_len(work->response_buf, new_len - len);
 401         rsp->NextCommand = cpu_to_le32(new_len);
 402
 403         work->next_smb2_rcv_hdr_off += next_hdr_offset;
 404         work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
 405         work->next_smb2_rsp_hdr_off += new_len;
 406         ksmbd_debug(SMB,
 407                     "Compound req new_len = %d rcv off = %d rsp off = %d\n",
 408                     new_len, work->next_smb2_rcv_hdr_off,
 409                     work->next_smb2_rsp_hdr_off);
 410
 411         rsp_hdr = ksmbd_resp_buf_next(work);
 412         rcv_hdr = ksmbd_req_buf_next(work);
 413
 414         if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
 415                 ksmbd_debug(SMB, "related flag should be set\n");
 416                 work->compound_fid = KSMBD_NO_FID;
 417                 work->compound_pfid = KSMBD_NO_FID;
 418         }
 419         memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 420         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 421         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 422         rsp_hdr->Command = rcv_hdr->Command;
 423
 424         /*
 425          * Message is response. We don't grant oplock yet.
 426          */
 427         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
 428                                 SMB2_FLAGS_RELATED_OPERATIONS);
 429         rsp_hdr->NextCommand = 0;
 430         rsp_hdr->MessageId = rcv_hdr->MessageId;
 431         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 432         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 433         rsp_hdr->SessionId = rcv_hdr->SessionId;
 434         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 435 }
 436
 437 /**
 438  * is_chained_smb2_message() - check for chained command
 439  * @work:       smb work containing smb request buffer
 440  *
 441  * Return:      true if chained request, otherwise false
 442  */
 443 bool is_chained_smb2_message(struct ksmbd_work *work)
 444 {
 445         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 446         unsigned int len, next_cmd;
 447
 448         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 449                 return false;
 450
 451         hdr = ksmbd_req_buf_next(work);
 452         next_cmd = le32_to_cpu(hdr->NextCommand);
 453         if (next_cmd > 0) {
 454                 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
 455                         __SMB2_HEADER_STRUCTURE_SIZE >
 456                     get_rfc1002_len(work->request_buf)) {
 457                         pr_err("next command(%u) offset exceeds smb msg size\n",
 458                                next_cmd);
 459                         return false;
 460                 }
 461
 462                 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
 463                     work->response_sz) {
 464                         pr_err("next response offset exceeds response buffer size\n");
 465                         return false;
 466                 }
 467
 468                 ksmbd_debug(SMB, "got SMB2 chained command\n");
 469                 init_chained_smb2_rsp(work);
 470                 return true;
 471         } else if (work->next_smb2_rcv_hdr_off) {
 472                 /*
 473                  * This is last request in chained command,
 474                  * align response to 8 byte
 475                  */
 476                 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
 477                 len = len - get_rfc1002_len(work->response_buf);
 478                 if (len) {
 479                         ksmbd_debug(SMB, "padding len %u\n", len);
 480                         work->iov[work->iov_idx].iov_len += len;
 481                         inc_rfc1001_len(work->response_buf, len);
 482                 }
 483                 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
 484         }
 485         return false;
 486 }
 487
 488 /**
 489  * init_smb2_rsp_hdr() - initialize smb2 response
 490  * @work:       smb work containing smb request buffer
 491  *
 492  * Return:      0
 493  */
 494 int init_smb2_rsp_hdr(struct ksmbd_work *work)
 495 {
 496         struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
 497         struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
 498
 499         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 500         rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
 501         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 502         rsp_hdr->Command = rcv_hdr->Command;
 503
 504         /*
 505          * Message is response. We don't grant oplock yet.
 506          */
 507         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 508         rsp_hdr->NextCommand = 0;
 509         rsp_hdr->MessageId = rcv_hdr->MessageId;
 510         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 511         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 512         rsp_hdr->SessionId = rcv_hdr->SessionId;
 513         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 514
 515         return 0;
 516 }
 517
 518 /**
 519  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
 520  * @work:       smb work containing smb request buffer
 521  *
 522  * Return:      0 on success, otherwise -ENOMEM
 523  */
 524 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
 525 {
 526         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 527         size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
 528         size_t large_sz = small_sz + work->conn->vals->max_trans_size;
 529         size_t sz = small_sz;
 530         int cmd = le16_to_cpu(hdr->Command);
 531
 532         if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
 533                 sz = large_sz;
 534
 535         if (cmd == SMB2_QUERY_INFO_HE) {
 536                 struct smb2_query_info_req *req;
 537
 538                 req = smb2_get_msg(work->request_buf);
 539                 if ((req->InfoType == SMB2_O_INFO_FILE &&
 540                      (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
 541                      req->FileInfoClass == FILE_ALL_INFORMATION)) ||
 542                     req->InfoType == SMB2_O_INFO_SECURITY)
 543                         sz = large_sz;
 544         }
 545
 546         /* allocate large response buf for chained commands */
 547         if (le32_to_cpu(hdr->NextCommand) > 0)
 548                 sz = large_sz;
 549
 550         work->response_buf = kvzalloc(sz, GFP_KERNEL);
 551         if (!work->response_buf)
 552                 return -ENOMEM;
 553
 554         work->response_sz = sz;
 555         return 0;
 556 }
 557
 558 /**
 559  * smb2_check_user_session() - check for valid session for a user
 560  * @work:       smb work containing smb request buffer
 561  *
 562  * Return:      0 on success, otherwise error
 563  */
 564 int smb2_check_user_session(struct ksmbd_work *work)
 565 {
 566         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 567         struct ksmbd_conn *conn = work->conn;
 568         unsigned int cmd = le16_to_cpu(req_hdr->Command);
 569         unsigned long long sess_id;
 570
 571         /*
 572          * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
 573          * require a session id, so no need to validate user session's for
 574          * these commands.
 575          */
 576         if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
 577             cmd == SMB2_SESSION_SETUP_HE)
 578                 return 0;
 579
 580         if (!ksmbd_conn_good(conn))
 581                 return -EIO;
 582
 583         sess_id = le64_to_cpu(req_hdr->SessionId);
 584
 585         /*
 586          * If request is not the first in Compound request,
 587          * Just validate session id in header with work->sess->id.
 588          */
 589         if (work->next_smb2_rcv_hdr_off) {
 590                 if (!work->sess) {
 591                         pr_err("The first operation in the compound does not have sess\n");
 592                         return -EINVAL;
 593                 }
 594                 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
 595                         pr_err("session id(%llu) is different with the first operation(%lld)\n",
 596                                         sess_id, work->sess->id);
 597                         return -EINVAL;
 598                 }
 599                 return 1;
 600         }
 601
 602         /* Check for validity of user session */
 603         work->sess = ksmbd_session_lookup_all(conn, sess_id);
 604         if (work->sess)
 605                 return 1;
 606         ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 607         return -ENOENT;
 608 }
 609
 610 static void destroy_previous_session(struct ksmbd_conn *conn,
 611                                      struct ksmbd_user *user, u64 id)
 612 {
 613         struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
 614         struct ksmbd_user *prev_user;
 615         struct channel *chann;
 616         long index;
 617
 618         if (!prev_sess)
 619                 return;
 620
 621         prev_user = prev_sess->user;
 622
 623         if (!prev_user ||
 624             strcmp(user->name, prev_user->name) ||
 625             user->passkey_sz != prev_user->passkey_sz ||
 626             memcmp(user->passkey, prev_user->passkey, user->passkey_sz))
 627                 return;
 628
 629         prev_sess->state = SMB2_SESSION_EXPIRED;
 630         xa_for_each(&prev_sess->ksmbd_chann_list, index, chann)
 631                 ksmbd_conn_set_exiting(chann->conn);
 632 }
 633
 634 /**
 635  * smb2_get_name() - get filename string from on the wire smb format
 636  * @src:        source buffer
 637  * @maxlen:     maxlen of source string
 638  * @local_nls:  nls_table pointer
 639  *
 640  * Return:      matching converted filename on success, otherwise error ptr
 641  */
 642 static char *
 643 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
 644 {
 645         char *name;
 646
 647         name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
 648         if (IS_ERR(name)) {
 649                 pr_err("failed to get name %ld\n", PTR_ERR(name));
 650                 return name;
 651         }
 652
 653         ksmbd_conv_path_to_unix(name);
 654         ksmbd_strip_last_slash(name);
 655         return name;
 656 }
 657
 658 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
 659 {
 660         struct smb2_hdr *rsp_hdr;
 661         struct ksmbd_conn *conn = work->conn;
 662         int id;
 663
 664         rsp_hdr = ksmbd_resp_buf_next(work);
 665         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 666
 667         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 668         if (id < 0) {
 669                 pr_err("Failed to alloc async message id\n");
 670                 return id;
 671         }
 672         work->asynchronous = true;
 673         work->async_id = id;
 674         rsp_hdr->Id.AsyncId = cpu_to_le64(id);
 675
 676         ksmbd_debug(SMB,
 677                     "Send interim Response to inform async request id : %d\n",
 678                     work->async_id);
 679
 680         work->cancel_fn = fn;
 681         work->cancel_argv = arg;
 682
 683         if (list_empty(&work->async_request_entry)) {
 684                 spin_lock(&conn->request_lock);
 685                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 686                 spin_unlock(&conn->request_lock);
 687         }
 688
 689         return 0;
 690 }
 691
 692 void release_async_work(struct ksmbd_work *work)
 693 {
 694         struct ksmbd_conn *conn = work->conn;
 695
 696         spin_lock(&conn->request_lock);
 697         list_del_init(&work->async_request_entry);
 698         spin_unlock(&conn->request_lock);
 699
 700         work->asynchronous = 0;
 701         work->cancel_fn = NULL;
 702         kfree(work->cancel_argv);
 703         work->cancel_argv = NULL;
 704         if (work->async_id) {
 705                 ksmbd_release_id(&conn->async_ida, work->async_id);
 706                 work->async_id = 0;
 707         }
 708 }
 709
 710 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 711 {
 712         struct smb2_hdr *rsp_hdr;
 713         struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
 714
 715         if (allocate_interim_rsp_buf(in_work)) {
 716                 pr_err("smb_allocate_rsp_buf failed!\n");
 717                 ksmbd_free_work_struct(in_work);
 718                 return;
 719         }
 720
 721         in_work->conn = work->conn;
 722         memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
 723                __SMB2_HEADER_STRUCTURE_SIZE);
 724
 725         rsp_hdr = smb2_get_msg(in_work->response_buf);
 726         smb2_set_err_rsp(in_work);
 727         rsp_hdr->Status = status;
 728
 729         ksmbd_conn_write(in_work);
 730         ksmbd_free_work_struct(in_work);
 731 }
 732
 733 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 734 {
 735         if (S_ISDIR(mode) || S_ISREG(mode))
 736                 return 0;
 737
 738         if (S_ISLNK(mode))
 739                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 740         else if (S_ISFIFO(mode))
 741                 return IO_REPARSE_TAG_LX_FIFO_LE;
 742         else if (S_ISSOCK(mode))
 743                 return IO_REPARSE_TAG_AF_UNIX_LE;
 744         else if (S_ISCHR(mode))
 745                 return IO_REPARSE_TAG_LX_CHR_LE;
 746         else if (S_ISBLK(mode))
 747                 return IO_REPARSE_TAG_LX_BLK_LE;
 748
 749         return 0;
 750 }
 751
 752 /**
 753  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 754  * @stat:       kstat containing file mode
 755  * @attribute:  attribute flags
 756  *
 757  * Return:      converted dos mode
 758  */
 759 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 760 {
 761         int attr = 0;
 762
 763         if (S_ISDIR(stat->mode)) {
 764                 attr = FILE_ATTRIBUTE_DIRECTORY |
 765                         (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
 766         } else {
 767                 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
 768                 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
 769                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 770                                 FILE_SUPPORTS_SPARSE_FILES))
 771                         attr |= FILE_ATTRIBUTE_SPARSE_FILE;
 772
 773                 if (smb2_get_reparse_tag_special_file(stat->mode))
 774                         attr |= FILE_ATTRIBUTE_REPARSE_POINT;
 775         }
 776
 777         return attr;
 778 }
 779
 780 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 781                                __le16 hash_id)
 782 {
 783         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 784         pneg_ctxt->DataLength = cpu_to_le16(38);
 785         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 786         pneg_ctxt->Reserved = cpu_to_le32(0);
 787         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 788         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 789         pneg_ctxt->HashAlgorithms = hash_id;
 790 }
 791
 792 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 793                                __le16 cipher_type)
 794 {
 795         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 796         pneg_ctxt->DataLength = cpu_to_le16(4);
 797         pneg_ctxt->Reserved = cpu_to_le32(0);
 798         pneg_ctxt->CipherCount = cpu_to_le16(1);
 799         pneg_ctxt->Ciphers[0] = cipher_type;
 800 }
 801
 802 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 803                                 __le16 sign_algo)
 804 {
 805         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 806         pneg_ctxt->DataLength =
 807                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 808                         - sizeof(struct smb2_neg_context));
 809         pneg_ctxt->Reserved = cpu_to_le32(0);
 810         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 811         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 812 }
 813
 814 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 815 {
 816         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 817         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 818         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 819         pneg_ctxt->Name[0] = 0x93;
 820         pneg_ctxt->Name[1] = 0xAD;
 821         pneg_ctxt->Name[2] = 0x25;
 822         pneg_ctxt->Name[3] = 0x50;
 823         pneg_ctxt->Name[4] = 0x9C;
 824         pneg_ctxt->Name[5] = 0xB4;
 825         pneg_ctxt->Name[6] = 0x11;
 826         pneg_ctxt->Name[7] = 0xE7;
 827         pneg_ctxt->Name[8] = 0xB4;
 828         pneg_ctxt->Name[9] = 0x23;
 829         pneg_ctxt->Name[10] = 0x83;
 830         pneg_ctxt->Name[11] = 0xDE;
 831         pneg_ctxt->Name[12] = 0x96;
 832         pneg_ctxt->Name[13] = 0x8B;
 833         pneg_ctxt->Name[14] = 0xCD;
 834         pneg_ctxt->Name[15] = 0x7C;
 835 }
 836
 837 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
 838                                   struct smb2_negotiate_rsp *rsp)
 839 {
 840         char * const pneg_ctxt = (char *)rsp +
 841                         le32_to_cpu(rsp->NegotiateContextOffset);
 842         int neg_ctxt_cnt = 1;
 843         int ctxt_size;
 844
 845         ksmbd_debug(SMB,
 846                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 847         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 848                            conn->preauth_info->Preauth_HashId);
 849         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 850
 851         if (conn->cipher_type) {
 852                 /* Round to 8 byte boundary */
 853                 ctxt_size = round_up(ctxt_size, 8);
 854                 ksmbd_debug(SMB,
 855                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 856                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
 857                                    (pneg_ctxt + ctxt_size),
 858                                    conn->cipher_type);
 859                 neg_ctxt_cnt++;
 860                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 861         }
 862
 863         /* compression context not yet supported */
 864         WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
 865
 866         if (conn->posix_ext_supported) {
 867                 ctxt_size = round_up(ctxt_size, 8);
 868                 ksmbd_debug(SMB,
 869                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 870                 build_posix_ctxt((struct smb2_posix_neg_context *)
 871                                  (pneg_ctxt + ctxt_size));
 872                 neg_ctxt_cnt++;
 873                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 874         }
 875
 876         if (conn->signing_negotiated) {
 877                 ctxt_size = round_up(ctxt_size, 8);
 878                 ksmbd_debug(SMB,
 879                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 880                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
 881                                     (pneg_ctxt + ctxt_size),
 882                                     conn->signing_algorithm);
 883                 neg_ctxt_cnt++;
 884                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 885         }
 886
 887         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 888         return ctxt_size + AUTH_GSS_PADDING;
 889 }
 890
 891 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 892                                   struct smb2_preauth_neg_context *pneg_ctxt,
 893                                   int ctxt_len)
 894 {
 895         /*
 896          * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
 897          * which may not be present. Only check for used HashAlgorithms[1].
 898          */
 899         if (ctxt_len <
 900             sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
 901                 return STATUS_INVALID_PARAMETER;
 902
 903         if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
 904                 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 905
 906         conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
 907         return STATUS_SUCCESS;
 908 }
 909
 910 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 911                                 struct smb2_encryption_neg_context *pneg_ctxt,
 912                                 int ctxt_len)
 913 {
 914         int cph_cnt;
 915         int i, cphs_size;
 916
 917         if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
 918                 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
 919                 return;
 920         }
 921
 922         conn->cipher_type = 0;
 923
 924         cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 925         cphs_size = cph_cnt * sizeof(__le16);
 926
 927         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 928             ctxt_len) {
 929                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 930                 return;
 931         }
 932
 933         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
 934                 return;
 935
 936         for (i = 0; i < cph_cnt; i++) {
 937                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 938                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 939                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 940                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 941                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 942                                     pneg_ctxt->Ciphers[i]);
 943                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 944                         break;
 945                 }
 946         }
 947 }
 948
 949 /**
 950  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
 951  * @conn:       smb connection
 952  *
 953  * Return:      true if connection should be encrypted, else false
 954  */
 955 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
 956 {
 957         if (!conn->ops->generate_encryptionkey)
 958                 return false;
 959
 960         /*
 961          * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
 962          * SMB 3.1.1 uses the cipher_type field.
 963          */
 964         return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
 965             conn->cipher_type;
 966 }
 967
 968 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 969                                  struct smb2_compression_capabilities_context *pneg_ctxt)
 970 {
 971         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 972 }
 973
 974 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 975                                  struct smb2_signing_capabilities *pneg_ctxt,
 976                                  int ctxt_len)
 977 {
 978         int sign_algo_cnt;
 979         int i, sign_alos_size;
 980
 981         if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
 982                 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
 983                 return;
 984         }
 985
 986         conn->signing_negotiated = false;
 987         sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 988         sign_alos_size = sign_algo_cnt * sizeof(__le16);
 989
 990         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 991             ctxt_len) {
 992                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 993                 return;
 994         }
 995
 996         for (i = 0; i < sign_algo_cnt; i++) {
 997                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
 998                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
 999                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
1000                                     pneg_ctxt->SigningAlgorithms[i]);
1001                         conn->signing_negotiated = true;
1002                         conn->signing_algorithm =
1003                                 pneg_ctxt->SigningAlgorithms[i];
1004                         break;
1005                 }
1006         }
1007 }
1008
1009 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
1010                                       struct smb2_negotiate_req *req,
1011                                       unsigned int len_of_smb)
1012 {
1013         /* +4 is to account for the RFC1001 len field */
1014         struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
1015         int i = 0, len_of_ctxts;
1016         unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1017         unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1018         __le32 status = STATUS_INVALID_PARAMETER;
1019
1020         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1021         if (len_of_smb <= offset) {
1022                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1023                 return status;
1024         }
1025
1026         len_of_ctxts = len_of_smb - offset;
1027
1028         while (i++ < neg_ctxt_cnt) {
1029                 int clen, ctxt_len;
1030
1031                 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1032                         break;
1033
1034                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1035                 clen = le16_to_cpu(pctx->DataLength);
1036                 ctxt_len = clen + sizeof(struct smb2_neg_context);
1037
1038                 if (ctxt_len > len_of_ctxts)
1039                         break;
1040
1041                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1042                         ksmbd_debug(SMB,
1043                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1044                         if (conn->preauth_info->Preauth_HashId)
1045                                 break;
1046
1047                         status = decode_preauth_ctxt(conn,
1048                                                      (struct smb2_preauth_neg_context *)pctx,
1049                                                      ctxt_len);
1050                         if (status != STATUS_SUCCESS)
1051                                 break;
1052                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1053                         ksmbd_debug(SMB,
1054                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1055                         if (conn->cipher_type)
1056                                 break;
1057
1058                         decode_encrypt_ctxt(conn,
1059                                             (struct smb2_encryption_neg_context *)pctx,
1060                                             ctxt_len);
1061                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1062                         ksmbd_debug(SMB,
1063                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1064                         if (conn->compress_algorithm)
1065                                 break;
1066
1067                         decode_compress_ctxt(conn,
1068                                              (struct smb2_compression_capabilities_context *)pctx);
1069                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1070                         ksmbd_debug(SMB,
1071                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1072                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1073                         ksmbd_debug(SMB,
1074                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1075                         conn->posix_ext_supported = true;
1076                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1077                         ksmbd_debug(SMB,
1078                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1079
1080                         decode_sign_cap_ctxt(conn,
1081                                              (struct smb2_signing_capabilities *)pctx,
1082                                              ctxt_len);
1083                 }
1084
1085                 /* offsets must be 8 byte aligned */
1086                 offset = (ctxt_len + 7) & ~0x7;
1087                 len_of_ctxts -= offset;
1088         }
1089         return status;
1090 }
1091
1092 /**
1093  * smb2_handle_negotiate() - handler for smb2 negotiate command
1094  * @work:       smb work containing smb request buffer
1095  *
1096  * Return:      0
1097  */
1098 int smb2_handle_negotiate(struct ksmbd_work *work)
1099 {
1100         struct ksmbd_conn *conn = work->conn;
1101         struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1102         struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1103         int rc = 0;
1104         unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1105         __le32 status;
1106
1107         ksmbd_debug(SMB, "Received negotiate request\n");
1108         conn->need_neg = false;
1109         if (ksmbd_conn_good(conn)) {
1110                 pr_err("conn->tcp_status is already in CifsGood State\n");
1111                 work->send_no_response = 1;
1112                 return rc;
1113         }
1114
1115         smb2_buf_len = get_rfc1002_len(work->request_buf);
1116         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1117         if (smb2_neg_size > smb2_buf_len) {
1118                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1119                 rc = -EINVAL;
1120                 goto err_out;
1121         }
1122
1123         if (req->DialectCount == 0) {
1124                 pr_err("malformed packet\n");
1125                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1126                 rc = -EINVAL;
1127                 goto err_out;
1128         }
1129
1130         if (conn->dialect == SMB311_PROT_ID) {
1131                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1132
1133                 if (smb2_buf_len < nego_ctxt_off) {
1134                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1135                         rc = -EINVAL;
1136                         goto err_out;
1137                 }
1138
1139                 if (smb2_neg_size > nego_ctxt_off) {
1140                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1141                         rc = -EINVAL;
1142                         goto err_out;
1143                 }
1144
1145                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1146                     nego_ctxt_off) {
1147                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1148                         rc = -EINVAL;
1149                         goto err_out;
1150                 }
1151         } else {
1152                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1153                     smb2_buf_len) {
1154                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1155                         rc = -EINVAL;
1156                         goto err_out;
1157                 }
1158         }
1159
1160         conn->cli_cap = le32_to_cpu(req->Capabilities);
1161         switch (conn->dialect) {
1162         case SMB311_PROT_ID:
1163                 conn->preauth_info =
1164                         kzalloc(sizeof(struct preauth_integrity_info),
1165                                 GFP_KERNEL);
1166                 if (!conn->preauth_info) {
1167                         rc = -ENOMEM;
1168                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1169                         goto err_out;
1170                 }
1171
1172                 status = deassemble_neg_contexts(conn, req,
1173                                                  get_rfc1002_len(work->request_buf));
1174                 if (status != STATUS_SUCCESS) {
1175                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1176                                status);
1177                         rsp->hdr.Status = status;
1178                         rc = -EINVAL;
1179                         kfree(conn->preauth_info);
1180                         conn->preauth_info = NULL;
1181                         goto err_out;
1182                 }
1183
1184                 rc = init_smb3_11_server(conn);
1185                 if (rc < 0) {
1186                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1187                         kfree(conn->preauth_info);
1188                         conn->preauth_info = NULL;
1189                         goto err_out;
1190                 }
1191
1192                 ksmbd_gen_preauth_integrity_hash(conn,
1193                                                  work->request_buf,
1194                                                  conn->preauth_info->Preauth_HashValue);
1195                 rsp->NegotiateContextOffset =
1196                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1197                 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1198                 break;
1199         case SMB302_PROT_ID:
1200                 init_smb3_02_server(conn);
1201                 break;
1202         case SMB30_PROT_ID:
1203                 init_smb3_0_server(conn);
1204                 break;
1205         case SMB21_PROT_ID:
1206                 init_smb2_1_server(conn);
1207                 break;
1208         case SMB2X_PROT_ID:
1209         case BAD_PROT_ID:
1210         default:
1211                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1212                             conn->dialect);
1213                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1214                 rc = -EINVAL;
1215                 goto err_out;
1216         }
1217         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1218
1219         /* For stats */
1220         conn->connection_type = conn->dialect;
1221
1222         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1223         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1224         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1225
1226         memcpy(conn->ClientGUID, req->ClientGUID,
1227                         SMB2_CLIENT_GUID_SIZE);
1228         conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1229
1230         rsp->StructureSize = cpu_to_le16(65);
1231         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1232         /* Not setting conn guid rsp->ServerGUID, as it
1233          * not used by client for identifying server
1234          */
1235         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1236
1237         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1238         rsp->ServerStartTime = 0;
1239         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1240                     le32_to_cpu(rsp->NegotiateContextOffset),
1241                     le16_to_cpu(rsp->NegotiateContextCount));
1242
1243         rsp->SecurityBufferOffset = cpu_to_le16(128);
1244         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1245         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1246                                   le16_to_cpu(rsp->SecurityBufferOffset));
1247
1248         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1249         conn->use_spnego = true;
1250
1251         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1252              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1253             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1254                 conn->sign = true;
1255         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1256                 server_conf.enforced_signing = true;
1257                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1258                 conn->sign = true;
1259         }
1260
1261         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1262         ksmbd_conn_set_need_negotiate(conn);
1263
1264 err_out:
1265         if (rc)
1266                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1267
1268         if (!rc)
1269                 rc = ksmbd_iov_pin_rsp(work, rsp,
1270                                        sizeof(struct smb2_negotiate_rsp) +
1271                                         AUTH_GSS_LENGTH + neg_ctxt_len);
1272         if (rc < 0)
1273                 smb2_set_err_rsp(work);
1274         return rc;
1275 }
1276
1277 static int alloc_preauth_hash(struct ksmbd_session *sess,
1278                               struct ksmbd_conn *conn)
1279 {
1280         if (sess->Preauth_HashValue)
1281                 return 0;
1282
1283         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1284                                           PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1285         if (!sess->Preauth_HashValue)
1286                 return -ENOMEM;
1287
1288         return 0;
1289 }
1290
1291 static int generate_preauth_hash(struct ksmbd_work *work)
1292 {
1293         struct ksmbd_conn *conn = work->conn;
1294         struct ksmbd_session *sess = work->sess;
1295         u8 *preauth_hash;
1296
1297         if (conn->dialect != SMB311_PROT_ID)
1298                 return 0;
1299
1300         if (conn->binding) {
1301                 struct preauth_session *preauth_sess;
1302
1303                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1304                 if (!preauth_sess) {
1305                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1306                         if (!preauth_sess)
1307                                 return -ENOMEM;
1308                 }
1309
1310                 preauth_hash = preauth_sess->Preauth_HashValue;
1311         } else {
1312                 if (!sess->Preauth_HashValue)
1313                         if (alloc_preauth_hash(sess, conn))
1314                                 return -ENOMEM;
1315                 preauth_hash = sess->Preauth_HashValue;
1316         }
1317
1318         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1319         return 0;
1320 }
1321
1322 static int decode_negotiation_token(struct ksmbd_conn *conn,
1323                                     struct negotiate_message *negblob,
1324                                     size_t sz)
1325 {
1326         if (!conn->use_spnego)
1327                 return -EINVAL;
1328
1329         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1330                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1331                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1332                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1333                         conn->use_spnego = false;
1334                 }
1335         }
1336         return 0;
1337 }
1338
1339 static int ntlm_negotiate(struct ksmbd_work *work,
1340                           struct negotiate_message *negblob,
1341                           size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1342 {
1343         struct challenge_message *chgblob;
1344         unsigned char *spnego_blob = NULL;
1345         u16 spnego_blob_len;
1346         char *neg_blob;
1347         int sz, rc;
1348
1349         ksmbd_debug(SMB, "negotiate phase\n");
1350         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1351         if (rc)
1352                 return rc;
1353
1354         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1355         chgblob =
1356                 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1357         memset(chgblob, 0, sizeof(struct challenge_message));
1358
1359         if (!work->conn->use_spnego) {
1360                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1361                 if (sz < 0)
1362                         return -ENOMEM;
1363
1364                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1365                 return 0;
1366         }
1367
1368         sz = sizeof(struct challenge_message);
1369         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1370
1371         neg_blob = kzalloc(sz, GFP_KERNEL);
1372         if (!neg_blob)
1373                 return -ENOMEM;
1374
1375         chgblob = (struct challenge_message *)neg_blob;
1376         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1377         if (sz < 0) {
1378                 rc = -ENOMEM;
1379                 goto out;
1380         }
1381
1382         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1383                                            neg_blob, sz);
1384         if (rc) {
1385                 rc = -ENOMEM;
1386                 goto out;
1387         }
1388
1389         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1390         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1391         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1392
1393 out:
1394         kfree(spnego_blob);
1395         kfree(neg_blob);
1396         return rc;
1397 }
1398
1399 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1400                                                   struct smb2_sess_setup_req *req)
1401 {
1402         int sz;
1403
1404         if (conn->use_spnego && conn->mechToken)
1405                 return (struct authenticate_message *)conn->mechToken;
1406
1407         sz = le16_to_cpu(req->SecurityBufferOffset);
1408         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1409                                                + sz);
1410 }
1411
1412 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1413                                        struct smb2_sess_setup_req *req)
1414 {
1415         struct authenticate_message *authblob;
1416         struct ksmbd_user *user;
1417         char *name;
1418         unsigned int name_off, name_len, secbuf_len;
1419
1420         secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1421         if (secbuf_len < sizeof(struct authenticate_message)) {
1422                 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1423                 return NULL;
1424         }
1425         authblob = user_authblob(conn, req);
1426         name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1427         name_len = le16_to_cpu(authblob->UserName.Length);
1428
1429         if (secbuf_len < (u64)name_off + name_len)
1430                 return NULL;
1431
1432         name = smb_strndup_from_utf16((const char *)authblob + name_off,
1433                                       name_len,
1434                                       true,
1435                                       conn->local_nls);
1436         if (IS_ERR(name)) {
1437                 pr_err("cannot allocate memory\n");
1438                 return NULL;
1439         }
1440
1441         ksmbd_debug(SMB, "session setup request for user %s\n", name);
1442         user = ksmbd_login_user(name);
1443         kfree(name);
1444         return user;
1445 }
1446
1447 static int ntlm_authenticate(struct ksmbd_work *work,
1448                              struct smb2_sess_setup_req *req,
1449                              struct smb2_sess_setup_rsp *rsp)
1450 {
1451         struct ksmbd_conn *conn = work->conn;
1452         struct ksmbd_session *sess = work->sess;
1453         struct channel *chann = NULL;
1454         struct ksmbd_user *user;
1455         u64 prev_id;
1456         int sz, rc;
1457
1458         ksmbd_debug(SMB, "authenticate phase\n");
1459         if (conn->use_spnego) {
1460                 unsigned char *spnego_blob;
1461                 u16 spnego_blob_len;
1462
1463                 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1464                                                     &spnego_blob_len,
1465                                                     0);
1466                 if (rc)
1467                         return -ENOMEM;
1468
1469                 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1470                 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1471                 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1472                 kfree(spnego_blob);
1473         }
1474
1475         user = session_user(conn, req);
1476         if (!user) {
1477                 ksmbd_debug(SMB, "Unknown user name or an error\n");
1478                 return -EPERM;
1479         }
1480
1481         /* Check for previous session */
1482         prev_id = le64_to_cpu(req->PreviousSessionId);
1483         if (prev_id && prev_id != sess->id)
1484                 destroy_previous_session(conn, user, prev_id);
1485
1486         if (sess->state == SMB2_SESSION_VALID) {
1487                 /*
1488                  * Reuse session if anonymous try to connect
1489                  * on reauthetication.
1490                  */
1491                 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1492                         ksmbd_free_user(user);
1493                         return 0;
1494                 }
1495
1496                 if (!ksmbd_compare_user(sess->user, user)) {
1497                         ksmbd_free_user(user);
1498                         return -EPERM;
1499                 }
1500                 ksmbd_free_user(user);
1501         } else {
1502                 sess->user = user;
1503         }
1504
1505         if (conn->binding == false && user_guest(sess->user)) {
1506                 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1507         } else {
1508                 struct authenticate_message *authblob;
1509
1510                 authblob = user_authblob(conn, req);
1511                 sz = le16_to_cpu(req->SecurityBufferLength);
1512                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1513                 if (rc) {
1514                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1515                         ksmbd_debug(SMB, "authentication failed\n");
1516                         return -EPERM;
1517                 }
1518         }
1519
1520         /*
1521          * If session state is SMB2_SESSION_VALID, We can assume
1522          * that it is reauthentication. And the user/password
1523          * has been verified, so return it here.
1524          */
1525         if (sess->state == SMB2_SESSION_VALID) {
1526                 if (conn->binding)
1527                         goto binding_session;
1528                 return 0;
1529         }
1530
1531         if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1532              (conn->sign || server_conf.enforced_signing)) ||
1533             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1534                 sess->sign = true;
1535
1536         if (smb3_encryption_negotiated(conn) &&
1537                         !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1538                 rc = conn->ops->generate_encryptionkey(conn, sess);
1539                 if (rc) {
1540                         ksmbd_debug(SMB,
1541                                         "SMB3 encryption key generation failed\n");
1542                         return -EINVAL;
1543                 }
1544                 sess->enc = true;
1545                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1546                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1547                 /*
1548                  * signing is disable if encryption is enable
1549                  * on this session
1550                  */
1551                 sess->sign = false;
1552         }
1553
1554 binding_session:
1555         if (conn->dialect >= SMB30_PROT_ID) {
1556                 chann = lookup_chann_list(sess, conn);
1557                 if (!chann) {
1558                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1559                         if (!chann)
1560                                 return -ENOMEM;
1561
1562                         chann->conn = conn;
1563                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1564                 }
1565         }
1566
1567         if (conn->ops->generate_signingkey) {
1568                 rc = conn->ops->generate_signingkey(sess, conn);
1569                 if (rc) {
1570                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1571                         return -EINVAL;
1572                 }
1573         }
1574
1575         if (!ksmbd_conn_lookup_dialect(conn)) {
1576                 pr_err("fail to verify the dialect\n");
1577                 return -ENOENT;
1578         }
1579         return 0;
1580 }
1581
1582 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1583 static int krb5_authenticate(struct ksmbd_work *work,
1584                              struct smb2_sess_setup_req *req,
1585                              struct smb2_sess_setup_rsp *rsp)
1586 {
1587         struct ksmbd_conn *conn = work->conn;
1588         struct ksmbd_session *sess = work->sess;
1589         char *in_blob, *out_blob;
1590         struct channel *chann = NULL;
1591         u64 prev_sess_id;
1592         int in_len, out_len;
1593         int retval;
1594
1595         in_blob = (char *)&req->hdr.ProtocolId +
1596                 le16_to_cpu(req->SecurityBufferOffset);
1597         in_len = le16_to_cpu(req->SecurityBufferLength);
1598         out_blob = (char *)&rsp->hdr.ProtocolId +
1599                 le16_to_cpu(rsp->SecurityBufferOffset);
1600         out_len = work->response_sz -
1601                 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1602
1603         /* Check previous session */
1604         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1605         if (prev_sess_id && prev_sess_id != sess->id)
1606                 destroy_previous_session(conn, sess->user, prev_sess_id);
1607
1608         if (sess->state == SMB2_SESSION_VALID)
1609                 ksmbd_free_user(sess->user);
1610
1611         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1612                                          out_blob, &out_len);
1613         if (retval) {
1614                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1615                 return -EINVAL;
1616         }
1617         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1618
1619         if ((conn->sign || server_conf.enforced_signing) ||
1620             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1621                 sess->sign = true;
1622
1623         if (smb3_encryption_negotiated(conn)) {
1624                 retval = conn->ops->generate_encryptionkey(conn, sess);
1625                 if (retval) {
1626                         ksmbd_debug(SMB,
1627                                     "SMB3 encryption key generation failed\n");
1628                         return -EINVAL;
1629                 }
1630                 sess->enc = true;
1631                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1632                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1633                 sess->sign = false;
1634         }
1635
1636         if (conn->dialect >= SMB30_PROT_ID) {
1637                 chann = lookup_chann_list(sess, conn);
1638                 if (!chann) {
1639                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1640                         if (!chann)
1641                                 return -ENOMEM;
1642
1643                         chann->conn = conn;
1644                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1645                 }
1646         }
1647
1648         if (conn->ops->generate_signingkey) {
1649                 retval = conn->ops->generate_signingkey(sess, conn);
1650                 if (retval) {
1651                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1652                         return -EINVAL;
1653                 }
1654         }
1655
1656         if (!ksmbd_conn_lookup_dialect(conn)) {
1657                 pr_err("fail to verify the dialect\n");
1658                 return -ENOENT;
1659         }
1660         return 0;
1661 }
1662 #else
1663 static int krb5_authenticate(struct ksmbd_work *work,
1664                              struct smb2_sess_setup_req *req,
1665                              struct smb2_sess_setup_rsp *rsp)
1666 {
1667         return -EOPNOTSUPP;
1668 }
1669 #endif
1670
1671 int smb2_sess_setup(struct ksmbd_work *work)
1672 {
1673         struct ksmbd_conn *conn = work->conn;
1674         struct smb2_sess_setup_req *req;
1675         struct smb2_sess_setup_rsp *rsp;
1676         struct ksmbd_session *sess;
1677         struct negotiate_message *negblob;
1678         unsigned int negblob_len, negblob_off;
1679         int rc = 0;
1680
1681         ksmbd_debug(SMB, "Received request for session setup\n");
1682
1683         WORK_BUFFERS(work, req, rsp);
1684
1685         rsp->StructureSize = cpu_to_le16(9);
1686         rsp->SessionFlags = 0;
1687         rsp->SecurityBufferOffset = cpu_to_le16(72);
1688         rsp->SecurityBufferLength = 0;
1689
1690         ksmbd_conn_lock(conn);
1691         if (!req->hdr.SessionId) {
1692                 sess = ksmbd_smb2_session_create();
1693                 if (!sess) {
1694                         rc = -ENOMEM;
1695                         goto out_err;
1696                 }
1697                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1698                 rc = ksmbd_session_register(conn, sess);
1699                 if (rc)
1700                         goto out_err;
1701         } else if (conn->dialect >= SMB30_PROT_ID &&
1702                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1703                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1704                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1705
1706                 sess = ksmbd_session_lookup_slowpath(sess_id);
1707                 if (!sess) {
1708                         rc = -ENOENT;
1709                         goto out_err;
1710                 }
1711
1712                 if (conn->dialect != sess->dialect) {
1713                         rc = -EINVAL;
1714                         goto out_err;
1715                 }
1716
1717                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1718                         rc = -EINVAL;
1719                         goto out_err;
1720                 }
1721
1722                 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1723                             SMB2_CLIENT_GUID_SIZE)) {
1724                         rc = -ENOENT;
1725                         goto out_err;
1726                 }
1727
1728                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1729                         rc = -EACCES;
1730                         goto out_err;
1731                 }
1732
1733                 if (sess->state == SMB2_SESSION_EXPIRED) {
1734                         rc = -EFAULT;
1735                         goto out_err;
1736                 }
1737
1738                 if (ksmbd_conn_need_reconnect(conn)) {
1739                         rc = -EFAULT;
1740                         sess = NULL;
1741                         goto out_err;
1742                 }
1743
1744                 if (ksmbd_session_lookup(conn, sess_id)) {
1745                         rc = -EACCES;
1746                         goto out_err;
1747                 }
1748
1749                 if (user_guest(sess->user)) {
1750                         rc = -EOPNOTSUPP;
1751                         goto out_err;
1752                 }
1753
1754                 conn->binding = true;
1755         } else if ((conn->dialect < SMB30_PROT_ID ||
1756                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1757                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1758                 sess = NULL;
1759                 rc = -EACCES;
1760                 goto out_err;
1761         } else {
1762                 sess = ksmbd_session_lookup(conn,
1763                                             le64_to_cpu(req->hdr.SessionId));
1764                 if (!sess) {
1765                         rc = -ENOENT;
1766                         goto out_err;
1767                 }
1768
1769                 if (sess->state == SMB2_SESSION_EXPIRED) {
1770                         rc = -EFAULT;
1771                         goto out_err;
1772                 }
1773
1774                 if (ksmbd_conn_need_reconnect(conn)) {
1775                         rc = -EFAULT;
1776                         sess = NULL;
1777                         goto out_err;
1778                 }
1779         }
1780         work->sess = sess;
1781
1782         negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1783         negblob_len = le16_to_cpu(req->SecurityBufferLength);
1784         if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
1785             negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1786                 rc = -EINVAL;
1787                 goto out_err;
1788         }
1789
1790         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1791                         negblob_off);
1792
1793         if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1794                 if (conn->mechToken)
1795                         negblob = (struct negotiate_message *)conn->mechToken;
1796         }
1797
1798         if (server_conf.auth_mechs & conn->auth_mechs) {
1799                 rc = generate_preauth_hash(work);
1800                 if (rc)
1801                         goto out_err;
1802
1803                 if (conn->preferred_auth_mech &
1804                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1805                         rc = krb5_authenticate(work, req, rsp);
1806                         if (rc) {
1807                                 rc = -EINVAL;
1808                                 goto out_err;
1809                         }
1810
1811                         if (!ksmbd_conn_need_reconnect(conn)) {
1812                                 ksmbd_conn_set_good(conn);
1813                                 sess->state = SMB2_SESSION_VALID;
1814                         }
1815                         kfree(sess->Preauth_HashValue);
1816                         sess->Preauth_HashValue = NULL;
1817                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1818                         if (negblob->MessageType == NtLmNegotiate) {
1819                                 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1820                                 if (rc)
1821                                         goto out_err;
1822                                 rsp->hdr.Status =
1823                                         STATUS_MORE_PROCESSING_REQUIRED;
1824                         } else if (negblob->MessageType == NtLmAuthenticate) {
1825                                 rc = ntlm_authenticate(work, req, rsp);
1826                                 if (rc)
1827                                         goto out_err;
1828
1829                                 if (!ksmbd_conn_need_reconnect(conn)) {
1830                                         ksmbd_conn_set_good(conn);
1831                                         sess->state = SMB2_SESSION_VALID;
1832                                 }
1833                                 if (conn->binding) {
1834                                         struct preauth_session *preauth_sess;
1835
1836                                         preauth_sess =
1837                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1838                                         if (preauth_sess) {
1839                                                 list_del(&preauth_sess->preauth_entry);
1840                                                 kfree(preauth_sess);
1841                                         }
1842                                 }
1843                                 kfree(sess->Preauth_HashValue);
1844                                 sess->Preauth_HashValue = NULL;
1845                         } else {
1846                                 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1847                                                 le32_to_cpu(negblob->MessageType));
1848                                 rc = -EINVAL;
1849                         }
1850                 } else {
1851                         /* TODO: need one more negotiation */
1852                         pr_err("Not support the preferred authentication\n");
1853                         rc = -EINVAL;
1854                 }
1855         } else {
1856                 pr_err("Not support authentication\n");
1857                 rc = -EINVAL;
1858         }
1859
1860 out_err:
1861         if (rc == -EINVAL)
1862                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1863         else if (rc == -ENOENT)
1864                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1865         else if (rc == -EACCES)
1866                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1867         else if (rc == -EFAULT)
1868                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1869         else if (rc == -ENOMEM)
1870                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1871         else if (rc == -EOPNOTSUPP)
1872                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1873         else if (rc)
1874                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1875
1876         if (conn->use_spnego && conn->mechToken) {
1877                 kfree(conn->mechToken);
1878                 conn->mechToken = NULL;
1879         }
1880
1881         if (rc < 0) {
1882                 /*
1883                  * SecurityBufferOffset should be set to zero
1884                  * in session setup error response.
1885                  */
1886                 rsp->SecurityBufferOffset = 0;
1887
1888                 if (sess) {
1889                         bool try_delay = false;
1890
1891                         /*
1892                          * To avoid dictionary attacks (repeated session setups rapidly sent) to
1893                          * connect to server, ksmbd make a delay of a 5 seconds on session setup
1894                          * failure to make it harder to send enough random connection requests
1895                          * to break into a server.
1896                          */
1897                         if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1898                                 try_delay = true;
1899
1900                         sess->last_active = jiffies;
1901                         sess->state = SMB2_SESSION_EXPIRED;
1902                         if (try_delay) {
1903                                 ksmbd_conn_set_need_reconnect(conn);
1904                                 ssleep(5);
1905                                 ksmbd_conn_set_need_negotiate(conn);
1906                         }
1907                 }
1908                 smb2_set_err_rsp(work);
1909         } else {
1910                 unsigned int iov_len;
1911
1912                 if (rsp->SecurityBufferLength)
1913                         iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1914                                 le16_to_cpu(rsp->SecurityBufferLength);
1915                 else
1916                         iov_len = sizeof(struct smb2_sess_setup_rsp);
1917                 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1918                 if (rc)
1919                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1920         }
1921
1922         ksmbd_conn_unlock(conn);
1923         return rc;
1924 }
1925
1926 /**
1927  * smb2_tree_connect() - handler for smb2 tree connect command
1928  * @work:       smb work containing smb request buffer
1929  *
1930  * Return:      0 on success, otherwise error
1931  */
1932 int smb2_tree_connect(struct ksmbd_work *work)
1933 {
1934         struct ksmbd_conn *conn = work->conn;
1935         struct smb2_tree_connect_req *req;
1936         struct smb2_tree_connect_rsp *rsp;
1937         struct ksmbd_session *sess = work->sess;
1938         char *treename = NULL, *name = NULL;
1939         struct ksmbd_tree_conn_status status;
1940         struct ksmbd_share_config *share;
1941         int rc = -EINVAL;
1942
1943         WORK_BUFFERS(work, req, rsp);
1944
1945         treename = smb_strndup_from_utf16(req->Buffer,
1946                                           le16_to_cpu(req->PathLength), true,
1947                                           conn->local_nls);
1948         if (IS_ERR(treename)) {
1949                 pr_err("treename is NULL\n");
1950                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1951                 goto out_err1;
1952         }
1953
1954         name = ksmbd_extract_sharename(conn->um, treename);
1955         if (IS_ERR(name)) {
1956                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1957                 goto out_err1;
1958         }
1959
1960         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1961                     name, treename);
1962
1963         status = ksmbd_tree_conn_connect(conn, sess, name);
1964         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1965                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1966         else
1967                 goto out_err1;
1968
1969         share = status.tree_conn->share_conf;
1970         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1971                 ksmbd_debug(SMB, "IPC share path request\n");
1972                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1973                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1974                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1975                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1976                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1977                         FILE_SYNCHRONIZE_LE;
1978         } else {
1979                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1980                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1981                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1982                 if (test_tree_conn_flag(status.tree_conn,
1983                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1984                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1985                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1986                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1987                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1988                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1989                                 FILE_SYNCHRONIZE_LE;
1990                 }
1991         }
1992
1993         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1994         if (conn->posix_ext_supported)
1995                 status.tree_conn->posix_extensions = true;
1996
1997         write_lock(&sess->tree_conns_lock);
1998         status.tree_conn->t_state = TREE_CONNECTED;
1999         write_unlock(&sess->tree_conns_lock);
2000         rsp->StructureSize = cpu_to_le16(16);
2001 out_err1:
2002         rsp->Capabilities = 0;
2003         rsp->Reserved = 0;
2004         /* default manual caching */
2005         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2006
2007         rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2008         if (rc)
2009                 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2010
2011         if (!IS_ERR(treename))
2012                 kfree(treename);
2013         if (!IS_ERR(name))
2014                 kfree(name);
2015
2016         switch (status.ret) {
2017         case KSMBD_TREE_CONN_STATUS_OK:
2018                 rsp->hdr.Status = STATUS_SUCCESS;
2019                 rc = 0;
2020                 break;
2021         case -ESTALE:
2022         case -ENOENT:
2023         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2024                 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2025                 break;
2026         case -ENOMEM:
2027         case KSMBD_TREE_CONN_STATUS_NOMEM:
2028                 rsp->hdr.Status = STATUS_NO_MEMORY;
2029                 break;
2030         case KSMBD_TREE_CONN_STATUS_ERROR:
2031         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2032         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2033                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2034                 break;
2035         case -EINVAL:
2036                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2037                 break;
2038         default:
2039                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2040         }
2041
2042         if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2043                 smb2_set_err_rsp(work);
2044
2045         return rc;
2046 }
2047
2048 /**
2049  * smb2_create_open_flags() - convert smb open flags to unix open flags
2050  * @file_present:       is file already present
2051  * @access:             file access flags
2052  * @disposition:        file disposition flags
2053  * @may_flags:          set with MAY_ flags
2054  *
2055  * Return:      file open flags
2056  */
2057 static int smb2_create_open_flags(bool file_present, __le32 access,
2058                                   __le32 disposition,
2059                                   int *may_flags)
2060 {
2061         int oflags = O_NONBLOCK | O_LARGEFILE;
2062
2063         if (access & FILE_READ_DESIRED_ACCESS_LE &&
2064             access & FILE_WRITE_DESIRE_ACCESS_LE) {
2065                 oflags |= O_RDWR;
2066                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2067         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2068                 oflags |= O_WRONLY;
2069                 *may_flags = MAY_OPEN | MAY_WRITE;
2070         } else {
2071                 oflags |= O_RDONLY;
2072                 *may_flags = MAY_OPEN | MAY_READ;
2073         }
2074
2075         if (access == FILE_READ_ATTRIBUTES_LE)
2076                 oflags |= O_PATH;
2077
2078         if (file_present) {
2079                 switch (disposition & FILE_CREATE_MASK_LE) {
2080                 case FILE_OPEN_LE:
2081                 case FILE_CREATE_LE:
2082                         break;
2083                 case FILE_SUPERSEDE_LE:
2084                 case FILE_OVERWRITE_LE:
2085                 case FILE_OVERWRITE_IF_LE:
2086                         oflags |= O_TRUNC;
2087                         break;
2088                 default:
2089                         break;
2090                 }
2091         } else {
2092                 switch (disposition & FILE_CREATE_MASK_LE) {
2093                 case FILE_SUPERSEDE_LE:
2094                 case FILE_CREATE_LE:
2095                 case FILE_OPEN_IF_LE:
2096                 case FILE_OVERWRITE_IF_LE:
2097                         oflags |= O_CREAT;
2098                         break;
2099                 case FILE_OPEN_LE:
2100                 case FILE_OVERWRITE_LE:
2101                         oflags &= ~O_CREAT;
2102                         break;
2103                 default:
2104                         break;
2105                 }
2106         }
2107
2108         return oflags;
2109 }
2110
2111 /**
2112  * smb2_tree_disconnect() - handler for smb tree connect request
2113  * @work:       smb work containing request buffer
2114  *
2115  * Return:      0
2116  */
2117 int smb2_tree_disconnect(struct ksmbd_work *work)
2118 {
2119         struct smb2_tree_disconnect_rsp *rsp;
2120         struct smb2_tree_disconnect_req *req;
2121         struct ksmbd_session *sess = work->sess;
2122         struct ksmbd_tree_connect *tcon = work->tcon;
2123         int err;
2124
2125         WORK_BUFFERS(work, req, rsp);
2126
2127         ksmbd_debug(SMB, "request\n");
2128
2129         if (!tcon) {
2130                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2131
2132                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2133                 err = -ENOENT;
2134                 goto err_out;
2135         }
2136
2137         ksmbd_close_tree_conn_fds(work);
2138
2139         write_lock(&sess->tree_conns_lock);
2140         if (tcon->t_state == TREE_DISCONNECTED) {
2141                 write_unlock(&sess->tree_conns_lock);
2142                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2143                 err = -ENOENT;
2144                 goto err_out;
2145         }
2146
2147         WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2148         tcon->t_state = TREE_DISCONNECTED;
2149         write_unlock(&sess->tree_conns_lock);
2150
2151         err = ksmbd_tree_conn_disconnect(sess, tcon);
2152         if (err) {
2153                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2154                 goto err_out;
2155         }
2156
2157         work->tcon = NULL;
2158
2159         rsp->StructureSize = cpu_to_le16(4);
2160         err = ksmbd_iov_pin_rsp(work, rsp,
2161                                 sizeof(struct smb2_tree_disconnect_rsp));
2162         if (err) {
2163                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2164                 goto err_out;
2165         }
2166
2167         return 0;
2168
2169 err_out:
2170         smb2_set_err_rsp(work);
2171         return err;
2172
2173 }
2174
2175 /**
2176  * smb2_session_logoff() - handler for session log off request
2177  * @work:       smb work containing request buffer
2178  *
2179  * Return:      0
2180  */
2181 int smb2_session_logoff(struct ksmbd_work *work)
2182 {
2183         struct ksmbd_conn *conn = work->conn;
2184         struct smb2_logoff_req *req;
2185         struct smb2_logoff_rsp *rsp;
2186         struct ksmbd_session *sess;
2187         u64 sess_id;
2188         int err;
2189
2190         WORK_BUFFERS(work, req, rsp);
2191
2192         ksmbd_debug(SMB, "request\n");
2193
2194         ksmbd_conn_lock(conn);
2195         if (!ksmbd_conn_good(conn)) {
2196                 ksmbd_conn_unlock(conn);
2197                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2198                 smb2_set_err_rsp(work);
2199                 return -ENOENT;
2200         }
2201         sess_id = le64_to_cpu(req->hdr.SessionId);
2202         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2203         ksmbd_conn_unlock(conn);
2204
2205         ksmbd_close_session_fds(work);
2206         ksmbd_conn_wait_idle(conn, sess_id);
2207
2208         /*
2209          * Re-lookup session to validate if session is deleted
2210          * while waiting request complete
2211          */
2212         sess = ksmbd_session_lookup_all(conn, sess_id);
2213         if (ksmbd_tree_conn_session_logoff(sess)) {
2214                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2215                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2216                 smb2_set_err_rsp(work);
2217                 return -ENOENT;
2218         }
2219
2220         ksmbd_destroy_file_table(&sess->file_table);
2221         sess->state = SMB2_SESSION_EXPIRED;
2222
2223         ksmbd_free_user(sess->user);
2224         sess->user = NULL;
2225         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2226
2227         rsp->StructureSize = cpu_to_le16(4);
2228         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2229         if (err) {
2230                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2231                 smb2_set_err_rsp(work);
2232                 return err;
2233         }
2234         return 0;
2235 }
2236
2237 /**
2238  * create_smb2_pipe() - create IPC pipe
2239  * @work:       smb work containing request buffer
2240  *
2241  * Return:      0 on success, otherwise error
2242  */
2243 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2244 {
2245         struct smb2_create_rsp *rsp;
2246         struct smb2_create_req *req;
2247         int id;
2248         int err;
2249         char *name;
2250
2251         WORK_BUFFERS(work, req, rsp);
2252
2253         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2254                                       1, work->conn->local_nls);
2255         if (IS_ERR(name)) {
2256                 rsp->hdr.Status = STATUS_NO_MEMORY;
2257                 err = PTR_ERR(name);
2258                 goto out;
2259         }
2260
2261         id = ksmbd_session_rpc_open(work->sess, name);
2262         if (id < 0) {
2263                 pr_err("Unable to open RPC pipe: %d\n", id);
2264                 err = id;
2265                 goto out;
2266         }
2267
2268         rsp->hdr.Status = STATUS_SUCCESS;
2269         rsp->StructureSize = cpu_to_le16(89);
2270         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2271         rsp->Flags = 0;
2272         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2273
2274         rsp->CreationTime = cpu_to_le64(0);
2275         rsp->LastAccessTime = cpu_to_le64(0);
2276         rsp->ChangeTime = cpu_to_le64(0);
2277         rsp->AllocationSize = cpu_to_le64(0);
2278         rsp->EndofFile = cpu_to_le64(0);
2279         rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2280         rsp->Reserved2 = 0;
2281         rsp->VolatileFileId = id;
2282         rsp->PersistentFileId = 0;
2283         rsp->CreateContextsOffset = 0;
2284         rsp->CreateContextsLength = 0;
2285
2286         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2287         if (err)
2288                 goto out;
2289
2290         kfree(name);
2291         return 0;
2292
2293 out:
2294         switch (err) {
2295         case -EINVAL:
2296                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2297                 break;
2298         case -ENOSPC:
2299         case -ENOMEM:
2300                 rsp->hdr.Status = STATUS_NO_MEMORY;
2301                 break;
2302         }
2303
2304         if (!IS_ERR(name))
2305                 kfree(name);
2306
2307         smb2_set_err_rsp(work);
2308         return err;
2309 }
2310
2311 /**
2312  * smb2_set_ea() - handler for setting extended attributes using set
2313  *              info command
2314  * @eabuf:      set info command buffer
2315  * @buf_len:    set info command buffer length
2316  * @path:       dentry path for get ea
2317  *
2318  * Return:      0 on success, otherwise error
2319  */
2320 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2321                        const struct path *path)
2322 {
2323         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2324         char *attr_name = NULL, *value;
2325         int rc = 0;
2326         unsigned int next = 0;
2327
2328         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2329                         le16_to_cpu(eabuf->EaValueLength))
2330                 return -EINVAL;
2331
2332         attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2333         if (!attr_name)
2334                 return -ENOMEM;
2335
2336         do {
2337                 if (!eabuf->EaNameLength)
2338                         goto next;
2339
2340                 ksmbd_debug(SMB,
2341                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2342                             eabuf->name, eabuf->EaNameLength,
2343                             le16_to_cpu(eabuf->EaValueLength),
2344                             le32_to_cpu(eabuf->NextEntryOffset));
2345
2346                 if (eabuf->EaNameLength >
2347                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2348                         rc = -EINVAL;
2349                         break;
2350                 }
2351
2352                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2353                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2354                        eabuf->EaNameLength);
2355                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2356                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2357
2358                 if (!eabuf->EaValueLength) {
2359                         rc = ksmbd_vfs_casexattr_len(idmap,
2360                                                      path->dentry,
2361                                                      attr_name,
2362                                                      XATTR_USER_PREFIX_LEN +
2363                                                      eabuf->EaNameLength);
2364
2365                         /* delete the EA only when it exits */
2366                         if (rc > 0) {
2367                                 rc = ksmbd_vfs_remove_xattr(idmap,
2368                                                             path,
2369                                                             attr_name);
2370
2371                                 if (rc < 0) {
2372                                         ksmbd_debug(SMB,
2373                                                     "remove xattr failed(%d)\n",
2374                                                     rc);
2375                                         break;
2376                                 }
2377                         }
2378
2379                         /* if the EA doesn't exist, just do nothing. */
2380                         rc = 0;
2381                 } else {
2382                         rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2383                                                 le16_to_cpu(eabuf->EaValueLength), 0);
2384                         if (rc < 0) {
2385                                 ksmbd_debug(SMB,
2386                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2387                                             rc);
2388                                 break;
2389                         }
2390                 }
2391
2392 next:
2393                 next = le32_to_cpu(eabuf->NextEntryOffset);
2394                 if (next == 0 || buf_len < next)
2395                         break;
2396                 buf_len -= next;
2397                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2398                 if (buf_len < sizeof(struct smb2_ea_info)) {
2399                         rc = -EINVAL;
2400                         break;
2401                 }
2402
2403                 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2404                                 le16_to_cpu(eabuf->EaValueLength)) {
2405                         rc = -EINVAL;
2406                         break;
2407                 }
2408         } while (next != 0);
2409
2410         kfree(attr_name);
2411         return rc;
2412 }
2413
2414 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2415                                                struct ksmbd_file *fp,
2416                                                char *stream_name, int s_type)
2417 {
2418         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2419         size_t xattr_stream_size;
2420         char *xattr_stream_name;
2421         int rc;
2422
2423         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2424                                          &xattr_stream_name,
2425                                          &xattr_stream_size,
2426                                          s_type);
2427         if (rc)
2428                 return rc;
2429
2430         fp->stream.name = xattr_stream_name;
2431         fp->stream.size = xattr_stream_size;
2432
2433         /* Check if there is stream prefix in xattr space */
2434         rc = ksmbd_vfs_casexattr_len(idmap,
2435                                      path->dentry,
2436                                      xattr_stream_name,
2437                                      xattr_stream_size);
2438         if (rc >= 0)
2439                 return 0;
2440
2441         if (fp->cdoption == FILE_OPEN_LE) {
2442                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2443                 return -EBADF;
2444         }
2445
2446         rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0);
2447         if (rc < 0)
2448                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2449         return 0;
2450 }
2451
2452 static int smb2_remove_smb_xattrs(const struct path *path)
2453 {
2454         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2455         char *name, *xattr_list = NULL;
2456         ssize_t xattr_list_len;
2457         int err = 0;
2458
2459         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2460         if (xattr_list_len < 0) {
2461                 goto out;
2462         } else if (!xattr_list_len) {
2463                 ksmbd_debug(SMB, "empty xattr in the file\n");
2464                 goto out;
2465         }
2466
2467         for (name = xattr_list; name - xattr_list < xattr_list_len;
2468                         name += strlen(name) + 1) {
2469                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2470
2471                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2472                     !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2473                              STREAM_PREFIX_LEN)) {
2474                         err = ksmbd_vfs_remove_xattr(idmap, path,
2475                                                      name);
2476                         if (err)
2477                                 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2478                                             name);
2479                 }
2480         }
2481 out:
2482         kvfree(xattr_list);
2483         return err;
2484 }
2485
2486 static int smb2_create_truncate(const struct path *path)
2487 {
2488         int rc = vfs_truncate(path, 0);
2489
2490         if (rc) {
2491                 pr_err("vfs_truncate failed, rc %d\n", rc);
2492                 return rc;
2493         }
2494
2495         rc = smb2_remove_smb_xattrs(path);
2496         if (rc == -EOPNOTSUPP)
2497                 rc = 0;
2498         if (rc)
2499                 ksmbd_debug(SMB,
2500                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2501                             rc);
2502         return rc;
2503 }
2504
2505 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2506                             struct ksmbd_file *fp)
2507 {
2508         struct xattr_dos_attrib da = {0};
2509         int rc;
2510
2511         if (!test_share_config_flag(tcon->share_conf,
2512                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2513                 return;
2514
2515         da.version = 4;
2516         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2517         da.itime = da.create_time = fp->create_time;
2518         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2519                 XATTR_DOSINFO_ITIME;
2520
2521         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da);
2522         if (rc)
2523                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2524 }
2525
2526 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2527                                const struct path *path, struct ksmbd_file *fp)
2528 {
2529         struct xattr_dos_attrib da;
2530         int rc;
2531
2532         fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2533
2534         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2535         if (!test_share_config_flag(tcon->share_conf,
2536                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2537                 return;
2538
2539         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2540                                             path->dentry, &da);
2541         if (rc > 0) {
2542                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2543                 fp->create_time = da.create_time;
2544                 fp->itime = da.itime;
2545         }
2546 }
2547
2548 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2549                       struct path *path, char *name, int open_flags,
2550                       umode_t posix_mode, bool is_dir)
2551 {
2552         struct ksmbd_tree_connect *tcon = work->tcon;
2553         struct ksmbd_share_config *share = tcon->share_conf;
2554         umode_t mode;
2555         int rc;
2556
2557         if (!(open_flags & O_CREAT))
2558                 return -EBADF;
2559
2560         ksmbd_debug(SMB, "file does not exist, so creating\n");
2561         if (is_dir == true) {
2562                 ksmbd_debug(SMB, "creating directory\n");
2563
2564                 mode = share_config_directory_mode(share, posix_mode);
2565                 rc = ksmbd_vfs_mkdir(work, name, mode);
2566                 if (rc)
2567                         return rc;
2568         } else {
2569                 ksmbd_debug(SMB, "creating regular file\n");
2570
2571                 mode = share_config_create_mode(share, posix_mode);
2572                 rc = ksmbd_vfs_create(work, name, mode);
2573                 if (rc)
2574                         return rc;
2575         }
2576
2577         rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2578         if (rc) {
2579                 pr_err("cannot get linux path (%s), err = %d\n",
2580                        name, rc);
2581                 return rc;
2582         }
2583         return 0;
2584 }
2585
2586 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2587                                  struct smb2_create_req *req,
2588                                  const struct path *path)
2589 {
2590         struct create_context *context;
2591         struct create_sd_buf_req *sd_buf;
2592
2593         if (!req->CreateContextsOffset)
2594                 return -ENOENT;
2595
2596         /* Parse SD BUFFER create contexts */
2597         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2598         if (!context)
2599                 return -ENOENT;
2600         else if (IS_ERR(context))
2601                 return PTR_ERR(context);
2602
2603         ksmbd_debug(SMB,
2604                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2605         sd_buf = (struct create_sd_buf_req *)context;
2606         if (le16_to_cpu(context->DataOffset) +
2607             le32_to_cpu(context->DataLength) <
2608             sizeof(struct create_sd_buf_req))
2609                 return -EINVAL;
2610         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2611                             le32_to_cpu(sd_buf->ccontext.DataLength), true);
2612 }
2613
2614 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2615                              struct mnt_idmap *idmap,
2616                              struct inode *inode)
2617 {
2618         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2619         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2620
2621         fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2622         fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2623         fattr->cf_mode = inode->i_mode;
2624         fattr->cf_acls = NULL;
2625         fattr->cf_dacls = NULL;
2626
2627         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2628                 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2629                 if (S_ISDIR(inode->i_mode))
2630                         fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2631         }
2632 }
2633
2634 /**
2635  * smb2_open() - handler for smb file open request
2636  * @work:       smb work containing request buffer
2637  *
2638  * Return:      0 on success, otherwise error
2639  */
2640 int smb2_open(struct ksmbd_work *work)
2641 {
2642         struct ksmbd_conn *conn = work->conn;
2643         struct ksmbd_session *sess = work->sess;
2644         struct ksmbd_tree_connect *tcon = work->tcon;
2645         struct smb2_create_req *req;
2646         struct smb2_create_rsp *rsp;
2647         struct path path, parent_path;
2648         struct ksmbd_share_config *share = tcon->share_conf;
2649         struct ksmbd_file *fp = NULL;
2650         struct file *filp = NULL;
2651         struct mnt_idmap *idmap = NULL;
2652         struct kstat stat;
2653         struct create_context *context;
2654         struct lease_ctx_info *lc = NULL;
2655         struct create_ea_buf_req *ea_buf = NULL;
2656         struct oplock_info *opinfo;
2657         __le32 *next_ptr = NULL;
2658         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2659         int rc = 0;
2660         int contxt_cnt = 0, query_disk_id = 0;
2661         int maximal_access_ctxt = 0, posix_ctxt = 0;
2662         int s_type = 0;
2663         int next_off = 0;
2664         char *name = NULL;
2665         char *stream_name = NULL;
2666         bool file_present = false, created = false, already_permitted = false;
2667         int share_ret, need_truncate = 0;
2668         u64 time;
2669         umode_t posix_mode = 0;
2670         __le32 daccess, maximal_access = 0;
2671         int iov_len = 0;
2672
2673         WORK_BUFFERS(work, req, rsp);
2674
2675         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2676             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2677                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2678                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2679                 smb2_set_err_rsp(work);
2680                 return -EINVAL;
2681         }
2682
2683         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2684                 ksmbd_debug(SMB, "IPC pipe create request\n");
2685                 return create_smb2_pipe(work);
2686         }
2687
2688         if (req->NameLength) {
2689                 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2690                     *(char *)req->Buffer == '\\') {
2691                         pr_err("not allow directory name included leading slash\n");
2692                         rc = -EINVAL;
2693                         goto err_out1;
2694                 }
2695
2696                 name = smb2_get_name(req->Buffer,
2697                                      le16_to_cpu(req->NameLength),
2698                                      work->conn->local_nls);
2699                 if (IS_ERR(name)) {
2700                         rc = PTR_ERR(name);
2701                         if (rc != -ENOMEM)
2702                                 rc = -ENOENT;
2703                         name = NULL;
2704                         goto err_out1;
2705                 }
2706
2707                 ksmbd_debug(SMB, "converted name = %s\n", name);
2708                 if (strchr(name, ':')) {
2709                         if (!test_share_config_flag(work->tcon->share_conf,
2710                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2711                                 rc = -EBADF;
2712                                 goto err_out1;
2713                         }
2714                         rc = parse_stream_name(name, &stream_name, &s_type);
2715                         if (rc < 0)
2716                                 goto err_out1;
2717                 }
2718
2719                 rc = ksmbd_validate_filename(name);
2720                 if (rc < 0)
2721                         goto err_out1;
2722
2723                 if (ksmbd_share_veto_filename(share, name)) {
2724                         rc = -ENOENT;
2725                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2726                                     name);
2727                         goto err_out1;
2728                 }
2729         } else {
2730                 name = kstrdup("", GFP_KERNEL);
2731                 if (!name) {
2732                         rc = -ENOMEM;
2733                         goto err_out1;
2734                 }
2735         }
2736
2737         req_op_level = req->RequestedOplockLevel;
2738         if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2739                 lc = parse_lease_state(req);
2740
2741         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2742                 pr_err("Invalid impersonationlevel : 0x%x\n",
2743                        le32_to_cpu(req->ImpersonationLevel));
2744                 rc = -EIO;
2745                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2746                 goto err_out1;
2747         }
2748
2749         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2750                 pr_err("Invalid create options : 0x%x\n",
2751                        le32_to_cpu(req->CreateOptions));
2752                 rc = -EINVAL;
2753                 goto err_out1;
2754         } else {
2755                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2756                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2757                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2758
2759                 if (req->CreateOptions &
2760                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2761                      FILE_RESERVE_OPFILTER_LE)) {
2762                         rc = -EOPNOTSUPP;
2763                         goto err_out1;
2764                 }
2765
2766                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2767                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2768                                 rc = -EINVAL;
2769                                 goto err_out1;
2770                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2771                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2772                         }
2773                 }
2774         }
2775
2776         if (le32_to_cpu(req->CreateDisposition) >
2777             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2778                 pr_err("Invalid create disposition : 0x%x\n",
2779                        le32_to_cpu(req->CreateDisposition));
2780                 rc = -EINVAL;
2781                 goto err_out1;
2782         }
2783
2784         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2785                 pr_err("Invalid desired access : 0x%x\n",
2786                        le32_to_cpu(req->DesiredAccess));
2787                 rc = -EACCES;
2788                 goto err_out1;
2789         }
2790
2791         if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2792                 pr_err("Invalid file attribute : 0x%x\n",
2793                        le32_to_cpu(req->FileAttributes));
2794                 rc = -EINVAL;
2795                 goto err_out1;
2796         }
2797
2798         if (req->CreateContextsOffset) {
2799                 /* Parse non-durable handle create contexts */
2800                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
2801                 if (IS_ERR(context)) {
2802                         rc = PTR_ERR(context);
2803                         goto err_out1;
2804                 } else if (context) {
2805                         ea_buf = (struct create_ea_buf_req *)context;
2806                         if (le16_to_cpu(context->DataOffset) +
2807                             le32_to_cpu(context->DataLength) <
2808                             sizeof(struct create_ea_buf_req)) {
2809                                 rc = -EINVAL;
2810                                 goto err_out1;
2811                         }
2812                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2813                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2814                                 rc = -EACCES;
2815                                 goto err_out1;
2816                         }
2817                 }
2818
2819                 context = smb2_find_context_vals(req,
2820                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
2821                 if (IS_ERR(context)) {
2822                         rc = PTR_ERR(context);
2823                         goto err_out1;
2824                 } else if (context) {
2825                         ksmbd_debug(SMB,
2826                                     "get query maximal access context\n");
2827                         maximal_access_ctxt = 1;
2828                 }
2829
2830                 context = smb2_find_context_vals(req,
2831                                                  SMB2_CREATE_TIMEWARP_REQUEST, 4);
2832                 if (IS_ERR(context)) {
2833                         rc = PTR_ERR(context);
2834                         goto err_out1;
2835                 } else if (context) {
2836                         ksmbd_debug(SMB, "get timewarp context\n");
2837                         rc = -EBADF;
2838                         goto err_out1;
2839                 }
2840
2841                 if (tcon->posix_extensions) {
2842                         context = smb2_find_context_vals(req,
2843                                                          SMB2_CREATE_TAG_POSIX, 16);
2844                         if (IS_ERR(context)) {
2845                                 rc = PTR_ERR(context);
2846                                 goto err_out1;
2847                         } else if (context) {
2848                                 struct create_posix *posix =
2849                                         (struct create_posix *)context;
2850                                 if (le16_to_cpu(context->DataOffset) +
2851                                     le32_to_cpu(context->DataLength) <
2852                                     sizeof(struct create_posix) - 4) {
2853                                         rc = -EINVAL;
2854                                         goto err_out1;
2855                                 }
2856                                 ksmbd_debug(SMB, "get posix context\n");
2857
2858                                 posix_mode = le32_to_cpu(posix->Mode);
2859                                 posix_ctxt = 1;
2860                         }
2861                 }
2862         }
2863
2864         if (ksmbd_override_fsids(work)) {
2865                 rc = -ENOMEM;
2866                 goto err_out1;
2867         }
2868
2869         rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
2870                                         &parent_path, &path, 1);
2871         if (!rc) {
2872                 file_present = true;
2873
2874                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2875                         /*
2876                          * If file exists with under flags, return access
2877                          * denied error.
2878                          */
2879                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2880                             req->CreateDisposition == FILE_OPEN_IF_LE) {
2881                                 rc = -EACCES;
2882                                 goto err_out;
2883                         }
2884
2885                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2886                                 ksmbd_debug(SMB,
2887                                             "User does not have write permission\n");
2888                                 rc = -EACCES;
2889                                 goto err_out;
2890                         }
2891                 } else if (d_is_symlink(path.dentry)) {
2892                         rc = -EACCES;
2893                         goto err_out;
2894                 }
2895
2896                 file_present = true;
2897                 idmap = mnt_idmap(path.mnt);
2898         } else {
2899                 if (rc != -ENOENT)
2900                         goto err_out;
2901                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2902                             name, rc);
2903                 rc = 0;
2904         }
2905
2906         if (stream_name) {
2907                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2908                         if (s_type == DATA_STREAM) {
2909                                 rc = -EIO;
2910                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2911                         }
2912                 } else {
2913                         if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
2914                             s_type == DATA_STREAM) {
2915                                 rc = -EIO;
2916                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2917                         }
2918                 }
2919
2920                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2921                     req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2922                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2923                         rc = -EIO;
2924                 }
2925
2926                 if (rc < 0)
2927                         goto err_out;
2928         }
2929
2930         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2931             S_ISDIR(d_inode(path.dentry)->i_mode) &&
2932             !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2933                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2934                             name, req->CreateOptions);
2935                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2936                 rc = -EIO;
2937                 goto err_out;
2938         }
2939
2940         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2941             !(req->CreateDisposition == FILE_CREATE_LE) &&
2942             !S_ISDIR(d_inode(path.dentry)->i_mode)) {
2943                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2944                 rc = -EIO;
2945                 goto err_out;
2946         }
2947
2948         if (!stream_name && file_present &&
2949             req->CreateDisposition == FILE_CREATE_LE) {
2950                 rc = -EEXIST;
2951                 goto err_out;
2952         }
2953
2954         daccess = smb_map_generic_desired_access(req->DesiredAccess);
2955
2956         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2957                 rc = smb_check_perm_dacl(conn, &path, &daccess,
2958                                          sess->user->uid);
2959                 if (rc)
2960                         goto err_out;
2961         }
2962
2963         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2964                 if (!file_present) {
2965                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2966                 } else {
2967                         ksmbd_vfs_query_maximal_access(idmap,
2968                                                             path.dentry,
2969                                                             &daccess);
2970                         already_permitted = true;
2971                 }
2972                 maximal_access = daccess;
2973         }
2974
2975         open_flags = smb2_create_open_flags(file_present, daccess,
2976                                             req->CreateDisposition,
2977                                             &may_flags);
2978
2979         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2980                 if (open_flags & O_CREAT) {
2981                         ksmbd_debug(SMB,
2982                                     "User does not have write permission\n");
2983                         rc = -EACCES;
2984                         goto err_out;
2985                 }
2986         }
2987
2988         /*create file if not present */
2989         if (!file_present) {
2990                 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
2991                                 posix_mode,
2992                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2993                 if (rc) {
2994                         if (rc == -ENOENT) {
2995                                 rc = -EIO;
2996                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2997                         }
2998                         goto err_out;
2999                 }
3000
3001                 created = true;
3002                 idmap = mnt_idmap(path.mnt);
3003                 if (ea_buf) {
3004                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3005                             sizeof(struct smb2_ea_info)) {
3006                                 rc = -EINVAL;
3007                                 goto err_out;
3008                         }
3009
3010                         rc = smb2_set_ea(&ea_buf->ea,
3011                                          le32_to_cpu(ea_buf->ccontext.DataLength),
3012                                          &path);
3013                         if (rc == -EOPNOTSUPP)
3014                                 rc = 0;
3015                         else if (rc)
3016                                 goto err_out;
3017                 }
3018         } else if (!already_permitted) {
3019                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3020                  * because execute(search) permission on a parent directory,
3021                  * is already granted.
3022                  */
3023                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3024                         rc = inode_permission(idmap,
3025                                               d_inode(path.dentry),
3026                                               may_flags);
3027                         if (rc)
3028                                 goto err_out;
3029
3030                         if ((daccess & FILE_DELETE_LE) ||
3031                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3032                                 rc = inode_permission(idmap,
3033                                                       d_inode(path.dentry->d_parent),
3034                                                       MAY_EXEC | MAY_WRITE);
3035                                 if (rc)
3036                                         goto err_out;
3037                         }
3038                 }
3039         }
3040
3041         rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
3042         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3043                 rc = -EBUSY;
3044                 goto err_out;
3045         }
3046
3047         rc = 0;
3048         filp = dentry_open(&path, open_flags, current_cred());
3049         if (IS_ERR(filp)) {
3050                 rc = PTR_ERR(filp);
3051                 pr_err("dentry open for dir failed, rc %d\n", rc);
3052                 goto err_out;
3053         }
3054
3055         if (file_present) {
3056                 if (!(open_flags & O_TRUNC))
3057                         file_info = FILE_OPENED;
3058                 else
3059                         file_info = FILE_OVERWRITTEN;
3060
3061                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3062                     FILE_SUPERSEDE_LE)
3063                         file_info = FILE_SUPERSEDED;
3064         } else if (open_flags & O_CREAT) {
3065                 file_info = FILE_CREATED;
3066         }
3067
3068         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3069
3070         /* Obtain Volatile-ID */
3071         fp = ksmbd_open_fd(work, filp);
3072         if (IS_ERR(fp)) {
3073                 fput(filp);
3074                 rc = PTR_ERR(fp);
3075                 fp = NULL;
3076                 goto err_out;
3077         }
3078
3079         /* Get Persistent-ID */
3080         ksmbd_open_durable_fd(fp);
3081         if (!has_file_id(fp->persistent_id)) {
3082                 rc = -ENOMEM;
3083                 goto err_out;
3084         }
3085
3086         fp->cdoption = req->CreateDisposition;
3087         fp->daccess = daccess;
3088         fp->saccess = req->ShareAccess;
3089         fp->coption = req->CreateOptions;
3090
3091         /* Set default windows and posix acls if creating new file */
3092         if (created) {
3093                 int posix_acl_rc;
3094                 struct inode *inode = d_inode(path.dentry);
3095
3096                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3097                                                            &path,
3098                                                            d_inode(path.dentry->d_parent));
3099                 if (posix_acl_rc)
3100                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3101
3102                 if (test_share_config_flag(work->tcon->share_conf,
3103                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3104                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3105                                               sess->user->gid);
3106                 }
3107
3108                 if (rc) {
3109                         rc = smb2_create_sd_buffer(work, req, &path);
3110                         if (rc) {
3111                                 if (posix_acl_rc)
3112                                         ksmbd_vfs_set_init_posix_acl(idmap,
3113                                                                      &path);
3114
3115                                 if (test_share_config_flag(work->tcon->share_conf,
3116                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3117                                         struct smb_fattr fattr;
3118                                         struct smb_ntsd *pntsd;
3119                                         int pntsd_size, ace_num = 0;
3120
3121                                         ksmbd_acls_fattr(&fattr, idmap, inode);
3122                                         if (fattr.cf_acls)
3123                                                 ace_num = fattr.cf_acls->a_count;
3124                                         if (fattr.cf_dacls)
3125                                                 ace_num += fattr.cf_dacls->a_count;
3126
3127                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
3128                                                         sizeof(struct smb_sid) * 3 +
3129                                                         sizeof(struct smb_acl) +
3130                                                         sizeof(struct smb_ace) * ace_num * 2,
3131                                                         GFP_KERNEL);
3132                                         if (!pntsd) {
3133                                                 posix_acl_release(fattr.cf_acls);
3134                                                 posix_acl_release(fattr.cf_dacls);
3135                                                 goto err_out;
3136                                         }
3137
3138                                         rc = build_sec_desc(idmap,
3139                                                             pntsd, NULL, 0,
3140                                                             OWNER_SECINFO |
3141                                                             GROUP_SECINFO |
3142                                                             DACL_SECINFO,
3143                                                             &pntsd_size, &fattr);
3144                                         posix_acl_release(fattr.cf_acls);
3145                                         posix_acl_release(fattr.cf_dacls);
3146                                         if (rc) {
3147                                                 kfree(pntsd);
3148                                                 goto err_out;
3149                                         }
3150
3151                                         rc = ksmbd_vfs_set_sd_xattr(conn,
3152                                                                     idmap,
3153                                                                     &path,
3154                                                                     pntsd,
3155                                                                     pntsd_size);
3156                                         kfree(pntsd);
3157                                         if (rc)
3158                                                 pr_err("failed to store ntacl in xattr : %d\n",
3159                                                        rc);
3160                                 }
3161                         }
3162                 }
3163                 rc = 0;
3164         }
3165
3166         if (stream_name) {
3167                 rc = smb2_set_stream_name_xattr(&path,
3168                                                 fp,
3169                                                 stream_name,
3170                                                 s_type);
3171                 if (rc)
3172                         goto err_out;
3173                 file_info = FILE_CREATED;
3174         }
3175
3176         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3177                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3178         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3179             !fp->attrib_only && !stream_name) {
3180                 smb_break_all_oplock(work, fp);
3181                 need_truncate = 1;
3182         }
3183
3184         /* fp should be searchable through ksmbd_inode.m_fp_list
3185          * after daccess, saccess, attrib_only, and stream are
3186          * initialized.
3187          */
3188         write_lock(&fp->f_ci->m_lock);
3189         list_add(&fp->node, &fp->f_ci->m_fp_list);
3190         write_unlock(&fp->f_ci->m_lock);
3191
3192         /* Check delete pending among previous fp before oplock break */
3193         if (ksmbd_inode_pending_delete(fp)) {
3194                 rc = -EBUSY;
3195                 goto err_out;
3196         }
3197
3198         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3199         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3200             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3201              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3202                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3203                         rc = share_ret;
3204                         goto err_out;
3205                 }
3206         } else {
3207                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3208                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3209                         ksmbd_debug(SMB,
3210                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3211                                     name, req_op_level, lc->req_state);
3212                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3213                         if (rc)
3214                                 goto err_out;
3215                 } else if (open_flags == O_RDONLY &&
3216                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3217                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3218                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3219
3220                 rc = smb_grant_oplock(work, req_op_level,
3221                                       fp->persistent_id, fp,
3222                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3223                                       lc, share_ret);
3224                 if (rc < 0)
3225                         goto err_out;
3226         }
3227
3228         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3229                 ksmbd_fd_set_delete_on_close(fp, file_info);
3230
3231         if (need_truncate) {
3232                 rc = smb2_create_truncate(&path);
3233                 if (rc)
3234                         goto err_out;
3235         }
3236
3237         if (req->CreateContextsOffset) {
3238                 struct create_alloc_size_req *az_req;
3239
3240                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3241                                         SMB2_CREATE_ALLOCATION_SIZE, 4);
3242                 if (IS_ERR(az_req)) {
3243                         rc = PTR_ERR(az_req);
3244                         goto err_out;
3245                 } else if (az_req) {
3246                         loff_t alloc_size;
3247                         int err;
3248
3249                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3250                             le32_to_cpu(az_req->ccontext.DataLength) <
3251                             sizeof(struct create_alloc_size_req)) {
3252                                 rc = -EINVAL;
3253                                 goto err_out;
3254                         }
3255                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3256                         ksmbd_debug(SMB,
3257                                     "request smb2 create allocate size : %llu\n",
3258                                     alloc_size);
3259                         smb_break_all_levII_oplock(work, fp, 1);
3260                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3261                                             alloc_size);
3262                         if (err < 0)
3263                                 ksmbd_debug(SMB,
3264                                             "vfs_fallocate is failed : %d\n",
3265                                             err);
3266                 }
3267
3268                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3269                 if (IS_ERR(context)) {
3270                         rc = PTR_ERR(context);
3271                         goto err_out;
3272                 } else if (context) {
3273                         ksmbd_debug(SMB, "get query on disk id context\n");
3274                         query_disk_id = 1;
3275                 }
3276         }
3277
3278         rc = ksmbd_vfs_getattr(&path, &stat);
3279         if (rc)
3280                 goto err_out;
3281
3282         if (stat.result_mask & STATX_BTIME)
3283                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3284         else
3285                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3286         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3287                 fp->f_ci->m_fattr =
3288                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3289
3290         if (!created)
3291                 smb2_update_xattrs(tcon, &path, fp);
3292         else
3293                 smb2_new_xattrs(tcon, &path, fp);
3294
3295         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3296
3297         rsp->StructureSize = cpu_to_le16(89);
3298         rcu_read_lock();
3299         opinfo = rcu_dereference(fp->f_opinfo);
3300         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3301         rcu_read_unlock();
3302         rsp->Flags = 0;
3303         rsp->CreateAction = cpu_to_le32(file_info);
3304         rsp->CreationTime = cpu_to_le64(fp->create_time);
3305         time = ksmbd_UnixTimeToNT(stat.atime);
3306         rsp->LastAccessTime = cpu_to_le64(time);
3307         time = ksmbd_UnixTimeToNT(stat.mtime);
3308         rsp->LastWriteTime = cpu_to_le64(time);
3309         time = ksmbd_UnixTimeToNT(stat.ctime);
3310         rsp->ChangeTime = cpu_to_le64(time);
3311         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3312                 cpu_to_le64(stat.blocks << 9);
3313         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3314         rsp->FileAttributes = fp->f_ci->m_fattr;
3315
3316         rsp->Reserved2 = 0;
3317
3318         rsp->PersistentFileId = fp->persistent_id;
3319         rsp->VolatileFileId = fp->volatile_id;
3320
3321         rsp->CreateContextsOffset = 0;
3322         rsp->CreateContextsLength = 0;
3323         iov_len = offsetof(struct smb2_create_rsp, Buffer);
3324
3325         /* If lease is request send lease context response */
3326         if (opinfo && opinfo->is_lease) {
3327                 struct create_context *lease_ccontext;
3328
3329                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3330                             name, opinfo->o_lease->state);
3331                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3332
3333                 lease_ccontext = (struct create_context *)rsp->Buffer;
3334                 contxt_cnt++;
3335                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3336                 le32_add_cpu(&rsp->CreateContextsLength,
3337                              conn->vals->create_lease_size);
3338                 iov_len += conn->vals->create_lease_size;
3339                 next_ptr = &lease_ccontext->Next;
3340                 next_off = conn->vals->create_lease_size;
3341         }
3342
3343         if (maximal_access_ctxt) {
3344                 struct create_context *mxac_ccontext;
3345
3346                 if (maximal_access == 0)
3347                         ksmbd_vfs_query_maximal_access(idmap,
3348                                                        path.dentry,
3349                                                        &maximal_access);
3350                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3351                                 le32_to_cpu(rsp->CreateContextsLength));
3352                 contxt_cnt++;
3353                 create_mxac_rsp_buf(rsp->Buffer +
3354                                 le32_to_cpu(rsp->CreateContextsLength),
3355                                 le32_to_cpu(maximal_access));
3356                 le32_add_cpu(&rsp->CreateContextsLength,
3357                              conn->vals->create_mxac_size);
3358                 iov_len += conn->vals->create_mxac_size;
3359                 if (next_ptr)
3360                         *next_ptr = cpu_to_le32(next_off);
3361                 next_ptr = &mxac_ccontext->Next;
3362                 next_off = conn->vals->create_mxac_size;
3363         }
3364
3365         if (query_disk_id) {
3366                 struct create_context *disk_id_ccontext;
3367
3368                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3369                                 le32_to_cpu(rsp->CreateContextsLength));
3370                 contxt_cnt++;
3371                 create_disk_id_rsp_buf(rsp->Buffer +
3372                                 le32_to_cpu(rsp->CreateContextsLength),
3373                                 stat.ino, tcon->id);
3374                 le32_add_cpu(&rsp->CreateContextsLength,
3375                              conn->vals->create_disk_id_size);
3376                 iov_len += conn->vals->create_disk_id_size;
3377                 if (next_ptr)
3378                         *next_ptr = cpu_to_le32(next_off);
3379                 next_ptr = &disk_id_ccontext->Next;
3380                 next_off = conn->vals->create_disk_id_size;
3381         }
3382
3383         if (posix_ctxt) {
3384                 contxt_cnt++;
3385                 create_posix_rsp_buf(rsp->Buffer +
3386                                 le32_to_cpu(rsp->CreateContextsLength),
3387                                 fp);
3388                 le32_add_cpu(&rsp->CreateContextsLength,
3389                              conn->vals->create_posix_size);
3390                 iov_len += conn->vals->create_posix_size;
3391                 if (next_ptr)
3392                         *next_ptr = cpu_to_le32(next_off);
3393         }
3394
3395         if (contxt_cnt > 0) {
3396                 rsp->CreateContextsOffset =
3397                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3398         }
3399
3400 err_out:
3401         if (file_present || created) {
3402                 inode_unlock(d_inode(parent_path.dentry));
3403                 path_put(&path);
3404                 path_put(&parent_path);
3405         }
3406         ksmbd_revert_fsids(work);
3407 err_out1:
3408         if (!rc) {
3409                 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3410                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3411         }
3412         if (rc) {
3413                 if (rc == -EINVAL)
3414                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3415                 else if (rc == -EOPNOTSUPP)
3416                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3417                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3418                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3419                 else if (rc == -ENOENT)
3420                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3421                 else if (rc == -EPERM)
3422                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3423                 else if (rc == -EBUSY)
3424                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3425                 else if (rc == -EBADF)
3426                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3427                 else if (rc == -ENOEXEC)
3428                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3429                 else if (rc == -ENXIO)
3430                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3431                 else if (rc == -EEXIST)
3432                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3433                 else if (rc == -EMFILE)
3434                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3435                 if (!rsp->hdr.Status)
3436                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3437
3438                 if (fp)
3439                         ksmbd_fd_put(work, fp);
3440                 smb2_set_err_rsp(work);
3441                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3442         }
3443
3444         kfree(name);
3445         kfree(lc);
3446
3447         return 0;
3448 }
3449
3450 static int readdir_info_level_struct_sz(int info_level)
3451 {
3452         switch (info_level) {
3453         case FILE_FULL_DIRECTORY_INFORMATION:
3454                 return sizeof(struct file_full_directory_info);
3455         case FILE_BOTH_DIRECTORY_INFORMATION:
3456                 return sizeof(struct file_both_directory_info);
3457         case FILE_DIRECTORY_INFORMATION:
3458                 return sizeof(struct file_directory_info);
3459         case FILE_NAMES_INFORMATION:
3460                 return sizeof(struct file_names_info);
3461         case FILEID_FULL_DIRECTORY_INFORMATION:
3462                 return sizeof(struct file_id_full_dir_info);
3463         case FILEID_BOTH_DIRECTORY_INFORMATION:
3464                 return sizeof(struct file_id_both_directory_info);
3465         case SMB_FIND_FILE_POSIX_INFO:
3466                 return sizeof(struct smb2_posix_info);
3467         default:
3468                 return -EOPNOTSUPP;
3469         }
3470 }
3471
3472 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3473 {
3474         switch (info_level) {
3475         case FILE_FULL_DIRECTORY_INFORMATION:
3476         {
3477                 struct file_full_directory_info *ffdinfo;
3478
3479                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3480                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3481                 d_info->name = ffdinfo->FileName;
3482                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3483                 return 0;
3484         }
3485         case FILE_BOTH_DIRECTORY_INFORMATION:
3486         {
3487                 struct file_both_directory_info *fbdinfo;
3488
3489                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3490                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3491                 d_info->name = fbdinfo->FileName;
3492                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3493                 return 0;
3494         }
3495         case FILE_DIRECTORY_INFORMATION:
3496         {
3497                 struct file_directory_info *fdinfo;
3498
3499                 fdinfo = (struct file_directory_info *)d_info->rptr;
3500                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3501                 d_info->name = fdinfo->FileName;
3502                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3503                 return 0;
3504         }
3505         case FILE_NAMES_INFORMATION:
3506         {
3507                 struct file_names_info *fninfo;
3508
3509                 fninfo = (struct file_names_info *)d_info->rptr;
3510                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3511                 d_info->name = fninfo->FileName;
3512                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3513                 return 0;
3514         }
3515         case FILEID_FULL_DIRECTORY_INFORMATION:
3516         {
3517                 struct file_id_full_dir_info *dinfo;
3518
3519                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3520                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3521                 d_info->name = dinfo->FileName;
3522                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3523                 return 0;
3524         }
3525         case FILEID_BOTH_DIRECTORY_INFORMATION:
3526         {
3527                 struct file_id_both_directory_info *fibdinfo;
3528
3529                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3530                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3531                 d_info->name = fibdinfo->FileName;
3532                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3533                 return 0;
3534         }
3535         case SMB_FIND_FILE_POSIX_INFO:
3536         {
3537                 struct smb2_posix_info *posix_info;
3538
3539                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3540                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3541                 d_info->name = posix_info->name;
3542                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3543                 return 0;
3544         }
3545         default:
3546                 return -EINVAL;
3547         }
3548 }
3549
3550 /**
3551  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3552  * buffer
3553  * @conn:       connection instance
3554  * @info_level: smb information level
3555  * @d_info:     structure included variables for query dir
3556  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3557  *
3558  * if directory has many entries, find first can't read it fully.
3559  * find next might be called multiple times to read remaining dir entries
3560  *
3561  * Return:      0 on success, otherwise error
3562  */
3563 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3564                                        struct ksmbd_dir_info *d_info,
3565                                        struct ksmbd_kstat *ksmbd_kstat)
3566 {
3567         int next_entry_offset = 0;
3568         char *conv_name;
3569         int conv_len;
3570         void *kstat;
3571         int struct_sz, rc = 0;
3572
3573         conv_name = ksmbd_convert_dir_info_name(d_info,
3574                                                 conn->local_nls,
3575                                                 &conv_len);
3576         if (!conv_name)
3577                 return -ENOMEM;
3578
3579         /* Somehow the name has only terminating NULL bytes */
3580         if (conv_len < 0) {
3581                 rc = -EINVAL;
3582                 goto free_conv_name;
3583         }
3584
3585         struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3586         next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3587         d_info->last_entry_off_align = next_entry_offset - struct_sz;
3588
3589         if (next_entry_offset > d_info->out_buf_len) {
3590                 d_info->out_buf_len = 0;
3591                 rc = -ENOSPC;
3592                 goto free_conv_name;
3593         }
3594
3595         kstat = d_info->wptr;
3596         if (info_level != FILE_NAMES_INFORMATION)
3597                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3598
3599         switch (info_level) {
3600         case FILE_FULL_DIRECTORY_INFORMATION:
3601         {
3602                 struct file_full_directory_info *ffdinfo;
3603
3604                 ffdinfo = (struct file_full_directory_info *)kstat;
3605                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3606                 ffdinfo->EaSize =
3607                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3608                 if (ffdinfo->EaSize)
3609                         ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3610                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3611                         ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3612                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3613                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3614                 break;
3615         }
3616         case FILE_BOTH_DIRECTORY_INFORMATION:
3617         {
3618                 struct file_both_directory_info *fbdinfo;
3619
3620                 fbdinfo = (struct file_both_directory_info *)kstat;
3621                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3622                 fbdinfo->EaSize =
3623                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3624                 if (fbdinfo->EaSize)
3625                         fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3626                 fbdinfo->ShortNameLength = 0;
3627                 fbdinfo->Reserved = 0;
3628                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3629                         fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3630                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3631                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3632                 break;
3633         }
3634         case FILE_DIRECTORY_INFORMATION:
3635         {
3636                 struct file_directory_info *fdinfo;
3637
3638                 fdinfo = (struct file_directory_info *)kstat;
3639                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3640                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3641                         fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3642                 memcpy(fdinfo->FileName, conv_name, conv_len);
3643                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3644                 break;
3645         }
3646         case FILE_NAMES_INFORMATION:
3647         {
3648                 struct file_names_info *fninfo;
3649
3650                 fninfo = (struct file_names_info *)kstat;
3651                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3652                 memcpy(fninfo->FileName, conv_name, conv_len);
3653                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3654                 break;
3655         }
3656         case FILEID_FULL_DIRECTORY_INFORMATION:
3657         {
3658                 struct file_id_full_dir_info *dinfo;
3659
3660                 dinfo = (struct file_id_full_dir_info *)kstat;
3661                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3662                 dinfo->EaSize =
3663                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3664                 if (dinfo->EaSize)
3665                         dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3666                 dinfo->Reserved = 0;
3667                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3668                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3669                         dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3670                 memcpy(dinfo->FileName, conv_name, conv_len);
3671                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3672                 break;
3673         }
3674         case FILEID_BOTH_DIRECTORY_INFORMATION:
3675         {
3676                 struct file_id_both_directory_info *fibdinfo;
3677
3678                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3679                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3680                 fibdinfo->EaSize =
3681                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3682                 if (fibdinfo->EaSize)
3683                         fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3684                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3685                 fibdinfo->ShortNameLength = 0;
3686                 fibdinfo->Reserved = 0;
3687                 fibdinfo->Reserved2 = cpu_to_le16(0);
3688                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3689                         fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3690                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3691                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3692                 break;
3693         }
3694         case SMB_FIND_FILE_POSIX_INFO:
3695         {
3696                 struct smb2_posix_info *posix_info;
3697                 u64 time;
3698
3699                 posix_info = (struct smb2_posix_info *)kstat;
3700                 posix_info->Ignored = 0;
3701                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3702                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3703                 posix_info->ChangeTime = cpu_to_le64(time);
3704                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3705                 posix_info->LastAccessTime = cpu_to_le64(time);
3706                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3707                 posix_info->LastWriteTime = cpu_to_le64(time);
3708                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3709                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3710                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3711                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3712                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3713                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3714                 posix_info->DosAttributes =
3715                         S_ISDIR(ksmbd_kstat->kstat->mode) ?
3716                                 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3717                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3718                         posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3719                 /*
3720                  * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3721                  * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3722                  *                sub_auth(4 * 1(num_subauth)) + RID(4).
3723                  */
3724                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3725                           SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3726                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3727                           SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3728                 memcpy(posix_info->name, conv_name, conv_len);
3729                 posix_info->name_len = cpu_to_le32(conv_len);
3730                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3731                 break;
3732         }
3733
3734         } /* switch (info_level) */
3735
3736         d_info->last_entry_offset = d_info->data_count;
3737         d_info->data_count += next_entry_offset;
3738         d_info->out_buf_len -= next_entry_offset;
3739         d_info->wptr += next_entry_offset;
3740
3741         ksmbd_debug(SMB,
3742                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3743                     info_level, d_info->out_buf_len,
3744                     next_entry_offset, d_info->data_count);
3745
3746 free_conv_name:
3747         kfree(conv_name);
3748         return rc;
3749 }
3750
3751 struct smb2_query_dir_private {
3752         struct ksmbd_work       *work;
3753         char                    *search_pattern;
3754         struct ksmbd_file       *dir_fp;
3755
3756         struct ksmbd_dir_info   *d_info;
3757         int                     info_level;
3758 };
3759
3760 static void lock_dir(struct ksmbd_file *dir_fp)
3761 {
3762         struct dentry *dir = dir_fp->filp->f_path.dentry;
3763
3764         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3765 }
3766
3767 static void unlock_dir(struct ksmbd_file *dir_fp)
3768 {
3769         struct dentry *dir = dir_fp->filp->f_path.dentry;
3770
3771         inode_unlock(d_inode(dir));
3772 }
3773
3774 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3775 {
3776         struct mnt_idmap        *idmap = file_mnt_idmap(priv->dir_fp->filp);
3777         struct kstat            kstat;
3778         struct ksmbd_kstat      ksmbd_kstat;
3779         int                     rc;
3780         int                     i;
3781
3782         for (i = 0; i < priv->d_info->num_entry; i++) {
3783                 struct dentry *dent;
3784
3785                 if (dentry_name(priv->d_info, priv->info_level))
3786                         return -EINVAL;
3787
3788                 lock_dir(priv->dir_fp);
3789                 dent = lookup_one(idmap, priv->d_info->name,
3790                                   priv->dir_fp->filp->f_path.dentry,
3791                                   priv->d_info->name_len);
3792                 unlock_dir(priv->dir_fp);
3793
3794                 if (IS_ERR(dent)) {
3795                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3796                                     priv->d_info->name,
3797                                     PTR_ERR(dent));
3798                         continue;
3799                 }
3800                 if (unlikely(d_is_negative(dent))) {
3801                         dput(dent);
3802                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
3803                                     priv->d_info->name);
3804                         continue;
3805                 }
3806
3807                 ksmbd_kstat.kstat = &kstat;
3808                 if (priv->info_level != FILE_NAMES_INFORMATION)
3809                         ksmbd_vfs_fill_dentry_attrs(priv->work,
3810                                                     idmap,
3811                                                     dent,
3812                                                     &ksmbd_kstat);
3813
3814                 rc = smb2_populate_readdir_entry(priv->work->conn,
3815                                                  priv->info_level,
3816                                                  priv->d_info,
3817                                                  &ksmbd_kstat);
3818                 dput(dent);
3819                 if (rc)
3820                         return rc;
3821         }
3822         return 0;
3823 }
3824
3825 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3826                                    int info_level)
3827 {
3828         int struct_sz;
3829         int conv_len;
3830         int next_entry_offset;
3831
3832         struct_sz = readdir_info_level_struct_sz(info_level);
3833         if (struct_sz == -EOPNOTSUPP)
3834                 return -EOPNOTSUPP;
3835
3836         conv_len = (d_info->name_len + 1) * 2;
3837         next_entry_offset = ALIGN(struct_sz + conv_len,
3838                                   KSMBD_DIR_INFO_ALIGNMENT);
3839
3840         if (next_entry_offset > d_info->out_buf_len) {
3841                 d_info->out_buf_len = 0;
3842                 return -ENOSPC;
3843         }
3844
3845         switch (info_level) {
3846         case FILE_FULL_DIRECTORY_INFORMATION:
3847         {
3848                 struct file_full_directory_info *ffdinfo;
3849
3850                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3851                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3852                 ffdinfo->FileName[d_info->name_len] = 0x00;
3853                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3854                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3855                 break;
3856         }
3857         case FILE_BOTH_DIRECTORY_INFORMATION:
3858         {
3859                 struct file_both_directory_info *fbdinfo;
3860
3861                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3862                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3863                 fbdinfo->FileName[d_info->name_len] = 0x00;
3864                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3865                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3866                 break;
3867         }
3868         case FILE_DIRECTORY_INFORMATION:
3869         {
3870                 struct file_directory_info *fdinfo;
3871
3872                 fdinfo = (struct file_directory_info *)d_info->wptr;
3873                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3874                 fdinfo->FileName[d_info->name_len] = 0x00;
3875                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3876                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3877                 break;
3878         }
3879         case FILE_NAMES_INFORMATION:
3880         {
3881                 struct file_names_info *fninfo;
3882
3883                 fninfo = (struct file_names_info *)d_info->wptr;
3884                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3885                 fninfo->FileName[d_info->name_len] = 0x00;
3886                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3887                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3888                 break;
3889         }
3890         case FILEID_FULL_DIRECTORY_INFORMATION:
3891         {
3892                 struct file_id_full_dir_info *dinfo;
3893
3894                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3895                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3896                 dinfo->FileName[d_info->name_len] = 0x00;
3897                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3898                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3899                 break;
3900         }
3901         case FILEID_BOTH_DIRECTORY_INFORMATION:
3902         {
3903                 struct file_id_both_directory_info *fibdinfo;
3904
3905                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3906                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3907                 fibdinfo->FileName[d_info->name_len] = 0x00;
3908                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3909                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3910                 break;
3911         }
3912         case SMB_FIND_FILE_POSIX_INFO:
3913         {
3914                 struct smb2_posix_info *posix_info;
3915
3916                 posix_info = (struct smb2_posix_info *)d_info->wptr;
3917                 memcpy(posix_info->name, d_info->name, d_info->name_len);
3918                 posix_info->name[d_info->name_len] = 0x00;
3919                 posix_info->name_len = cpu_to_le32(d_info->name_len);
3920                 posix_info->NextEntryOffset =
3921                         cpu_to_le32(next_entry_offset);
3922                 break;
3923         }
3924         } /* switch (info_level) */
3925
3926         d_info->num_entry++;
3927         d_info->out_buf_len -= next_entry_offset;
3928         d_info->wptr += next_entry_offset;
3929         return 0;
3930 }
3931
3932 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
3933                        loff_t offset, u64 ino, unsigned int d_type)
3934 {
3935         struct ksmbd_readdir_data       *buf;
3936         struct smb2_query_dir_private   *priv;
3937         struct ksmbd_dir_info           *d_info;
3938         int                             rc;
3939
3940         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
3941         priv    = buf->private;
3942         d_info  = priv->d_info;
3943
3944         /* dot and dotdot entries are already reserved */
3945         if (!strcmp(".", name) || !strcmp("..", name))
3946                 return true;
3947         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3948                 return true;
3949         if (!match_pattern(name, namlen, priv->search_pattern))
3950                 return true;
3951
3952         d_info->name            = name;
3953         d_info->name_len        = namlen;
3954         rc = reserve_populate_dentry(d_info, priv->info_level);
3955         if (rc)
3956                 return false;
3957         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
3958                 d_info->out_buf_len = 0;
3959         return true;
3960 }
3961
3962 static int verify_info_level(int info_level)
3963 {
3964         switch (info_level) {
3965         case FILE_FULL_DIRECTORY_INFORMATION:
3966         case FILE_BOTH_DIRECTORY_INFORMATION:
3967         case FILE_DIRECTORY_INFORMATION:
3968         case FILE_NAMES_INFORMATION:
3969         case FILEID_FULL_DIRECTORY_INFORMATION:
3970         case FILEID_BOTH_DIRECTORY_INFORMATION:
3971         case SMB_FIND_FILE_POSIX_INFO:
3972                 break;
3973         default:
3974                 return -EOPNOTSUPP;
3975         }
3976
3977         return 0;
3978 }
3979
3980 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
3981 {
3982         int free_len;
3983
3984         free_len = (int)(work->response_sz -
3985                 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
3986         return free_len;
3987 }
3988
3989 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
3990                                      unsigned short hdr2_len,
3991                                      unsigned int out_buf_len)
3992 {
3993         int free_len;
3994
3995         if (out_buf_len > work->conn->vals->max_trans_size)
3996                 return -EINVAL;
3997
3998         free_len = smb2_resp_buf_len(work, hdr2_len);
3999         if (free_len < 0)
4000                 return -EINVAL;
4001
4002         return min_t(int, out_buf_len, free_len);
4003 }
4004
4005 int smb2_query_dir(struct ksmbd_work *work)
4006 {
4007         struct ksmbd_conn *conn = work->conn;
4008         struct smb2_query_directory_req *req;
4009         struct smb2_query_directory_rsp *rsp;
4010         struct ksmbd_share_config *share = work->tcon->share_conf;
4011         struct ksmbd_file *dir_fp = NULL;
4012         struct ksmbd_dir_info d_info;
4013         int rc = 0;
4014         char *srch_ptr = NULL;
4015         unsigned char srch_flag;
4016         int buffer_sz;
4017         struct smb2_query_dir_private query_dir_private = {NULL, };
4018
4019         WORK_BUFFERS(work, req, rsp);
4020
4021         if (ksmbd_override_fsids(work)) {
4022                 rsp->hdr.Status = STATUS_NO_MEMORY;
4023                 smb2_set_err_rsp(work);
4024                 return -ENOMEM;
4025         }
4026
4027         rc = verify_info_level(req->FileInformationClass);
4028         if (rc) {
4029                 rc = -EFAULT;
4030                 goto err_out2;
4031         }
4032
4033         dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4034         if (!dir_fp) {
4035                 rc = -EBADF;
4036                 goto err_out2;
4037         }
4038
4039         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4040             inode_permission(file_mnt_idmap(dir_fp->filp),
4041                              file_inode(dir_fp->filp),
4042                              MAY_READ | MAY_EXEC)) {
4043                 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4044                 rc = -EACCES;
4045                 goto err_out2;
4046         }
4047
4048         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4049                 pr_err("can't do query dir for a file\n");
4050                 rc = -EINVAL;
4051                 goto err_out2;
4052         }
4053
4054         srch_flag = req->Flags;
4055         srch_ptr = smb_strndup_from_utf16(req->Buffer,
4056                                           le16_to_cpu(req->FileNameLength), 1,
4057                                           conn->local_nls);
4058         if (IS_ERR(srch_ptr)) {
4059                 ksmbd_debug(SMB, "Search Pattern not found\n");
4060                 rc = -EINVAL;
4061                 goto err_out2;
4062         } else {
4063                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4064         }
4065
4066         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4067                 ksmbd_debug(SMB, "Restart directory scan\n");
4068                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4069         }
4070
4071         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4072         d_info.wptr = (char *)rsp->Buffer;
4073         d_info.rptr = (char *)rsp->Buffer;
4074         d_info.out_buf_len =
4075                 smb2_calc_max_out_buf_len(work, 8,
4076                                           le32_to_cpu(req->OutputBufferLength));
4077         if (d_info.out_buf_len < 0) {
4078                 rc = -EINVAL;
4079                 goto err_out;
4080         }
4081         d_info.flags = srch_flag;
4082
4083         /*
4084          * reserve dot and dotdot entries in head of buffer
4085          * in first response
4086          */
4087         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4088                                                dir_fp, &d_info, srch_ptr,
4089                                                smb2_populate_readdir_entry);
4090         if (rc == -ENOSPC)
4091                 rc = 0;
4092         else if (rc)
4093                 goto err_out;
4094
4095         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4096                 d_info.hide_dot_file = true;
4097
4098         buffer_sz                               = d_info.out_buf_len;
4099         d_info.rptr                             = d_info.wptr;
4100         query_dir_private.work                  = work;
4101         query_dir_private.search_pattern        = srch_ptr;
4102         query_dir_private.dir_fp                = dir_fp;
4103         query_dir_private.d_info                = &d_info;
4104         query_dir_private.info_level            = req->FileInformationClass;
4105         dir_fp->readdir_data.private            = &query_dir_private;
4106         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4107
4108         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4109         /*
4110          * req->OutputBufferLength is too small to contain even one entry.
4111          * In this case, it immediately returns OutputBufferLength 0 to client.
4112          */
4113         if (!d_info.out_buf_len && !d_info.num_entry)
4114                 goto no_buf_len;
4115         if (rc > 0 || rc == -ENOSPC)
4116                 rc = 0;
4117         else if (rc)
4118                 goto err_out;
4119
4120         d_info.wptr = d_info.rptr;
4121         d_info.out_buf_len = buffer_sz;
4122         rc = process_query_dir_entries(&query_dir_private);
4123         if (rc)
4124                 goto err_out;
4125
4126         if (!d_info.data_count && d_info.out_buf_len >= 0) {
4127                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4128                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4129                 } else {
4130                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4131                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
4132                 }
4133                 rsp->StructureSize = cpu_to_le16(9);
4134                 rsp->OutputBufferOffset = cpu_to_le16(0);
4135                 rsp->OutputBufferLength = cpu_to_le32(0);
4136                 rsp->Buffer[0] = 0;
4137                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4138                                        sizeof(struct smb2_query_directory_rsp));
4139                 if (rc)
4140                         goto err_out;
4141         } else {
4142 no_buf_len:
4143                 ((struct file_directory_info *)
4144                 ((char *)rsp->Buffer + d_info.last_entry_offset))
4145                 ->NextEntryOffset = 0;
4146                 if (d_info.data_count >= d_info.last_entry_off_align)
4147                         d_info.data_count -= d_info.last_entry_off_align;
4148
4149                 rsp->StructureSize = cpu_to_le16(9);
4150                 rsp->OutputBufferOffset = cpu_to_le16(72);
4151                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4152                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4153                                        offsetof(struct smb2_query_directory_rsp, Buffer) +
4154                                        d_info.data_count);
4155                 if (rc)
4156                         goto err_out;
4157         }
4158
4159         kfree(srch_ptr);
4160         ksmbd_fd_put(work, dir_fp);
4161         ksmbd_revert_fsids(work);
4162         return 0;
4163
4164 err_out:
4165         pr_err("error while processing smb2 query dir rc = %d\n", rc);
4166         kfree(srch_ptr);
4167
4168 err_out2:
4169         if (rc == -EINVAL)
4170                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4171         else if (rc == -EACCES)
4172                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4173         else if (rc == -ENOENT)
4174                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4175         else if (rc == -EBADF)
4176                 rsp->hdr.Status = STATUS_FILE_CLOSED;
4177         else if (rc == -ENOMEM)
4178                 rsp->hdr.Status = STATUS_NO_MEMORY;
4179         else if (rc == -EFAULT)
4180                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4181         else if (rc == -EIO)
4182                 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4183         if (!rsp->hdr.Status)
4184                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4185
4186         smb2_set_err_rsp(work);
4187         ksmbd_fd_put(work, dir_fp);
4188         ksmbd_revert_fsids(work);
4189         return 0;
4190 }
4191
4192 /**
4193  * buffer_check_err() - helper function to check buffer errors
4194  * @reqOutputBufferLength:      max buffer length expected in command response
4195  * @rsp:                query info response buffer contains output buffer length
4196  * @rsp_org:            base response buffer pointer in case of chained response
4197  *
4198  * Return:      0 on success, otherwise error
4199  */
4200 static int buffer_check_err(int reqOutputBufferLength,
4201                             struct smb2_query_info_rsp *rsp,
4202                             void *rsp_org)
4203 {
4204         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4205                 pr_err("Invalid Buffer Size Requested\n");
4206                 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4207                 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4208                 return -EINVAL;
4209         }
4210         return 0;
4211 }
4212
4213 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4214                                    void *rsp_org)
4215 {
4216         struct smb2_file_standard_info *sinfo;
4217
4218         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4219
4220         sinfo->AllocationSize = cpu_to_le64(4096);
4221         sinfo->EndOfFile = cpu_to_le64(0);
4222         sinfo->NumberOfLinks = cpu_to_le32(1);
4223         sinfo->DeletePending = 1;
4224         sinfo->Directory = 0;
4225         rsp->OutputBufferLength =
4226                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4227 }
4228
4229 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4230                                    void *rsp_org)
4231 {
4232         struct smb2_file_internal_info *file_info;
4233
4234         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4235
4236         /* any unique number */
4237         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4238         rsp->OutputBufferLength =
4239                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4240 }
4241
4242 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4243                                    struct smb2_query_info_req *req,
4244                                    struct smb2_query_info_rsp *rsp,
4245                                    void *rsp_org)
4246 {
4247         u64 id;
4248         int rc;
4249
4250         /*
4251          * Windows can sometime send query file info request on
4252          * pipe without opening it, checking error condition here
4253          */
4254         id = req->VolatileFileId;
4255         if (!ksmbd_session_rpc_method(sess, id))
4256                 return -ENOENT;
4257
4258         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4259                     req->FileInfoClass, req->VolatileFileId);
4260
4261         switch (req->FileInfoClass) {
4262         case FILE_STANDARD_INFORMATION:
4263                 get_standard_info_pipe(rsp, rsp_org);
4264                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4265                                       rsp, rsp_org);
4266                 break;
4267         case FILE_INTERNAL_INFORMATION:
4268                 get_internal_info_pipe(rsp, id, rsp_org);
4269                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4270                                       rsp, rsp_org);
4271                 break;
4272         default:
4273                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4274                             req->FileInfoClass);
4275                 rc = -EOPNOTSUPP;
4276         }
4277         return rc;
4278 }
4279
4280 /**
4281  * smb2_get_ea() - handler for smb2 get extended attribute command
4282  * @work:       smb work containing query info command buffer
4283  * @fp:         ksmbd_file pointer
4284  * @req:        get extended attribute request
4285  * @rsp:        response buffer pointer
4286  * @rsp_org:    base response buffer pointer in case of chained response
4287  *
4288  * Return:      0 on success, otherwise error
4289  */
4290 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4291                        struct smb2_query_info_req *req,
4292                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4293 {
4294         struct smb2_ea_info *eainfo, *prev_eainfo;
4295         char *name, *ptr, *xattr_list = NULL, *buf;
4296         int rc, name_len, value_len, xattr_list_len, idx;
4297         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4298         struct smb2_ea_info_req *ea_req = NULL;
4299         const struct path *path;
4300         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4301
4302         if (!(fp->daccess & FILE_READ_EA_LE)) {
4303                 pr_err("Not permitted to read ext attr : 0x%x\n",
4304                        fp->daccess);
4305                 return -EACCES;
4306         }
4307
4308         path = &fp->filp->f_path;
4309         /* single EA entry is requested with given user.* name */
4310         if (req->InputBufferLength) {
4311                 if (le32_to_cpu(req->InputBufferLength) <
4312                     sizeof(struct smb2_ea_info_req))
4313                         return -EINVAL;
4314
4315                 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4316         } else {
4317                 /* need to send all EAs, if no specific EA is requested*/
4318                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4319                         ksmbd_debug(SMB,
4320                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4321                                     le32_to_cpu(req->Flags));
4322         }
4323
4324         buf_free_len =
4325                 smb2_calc_max_out_buf_len(work, 8,
4326                                           le32_to_cpu(req->OutputBufferLength));
4327         if (buf_free_len < 0)
4328                 return -EINVAL;
4329
4330         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4331         if (rc < 0) {
4332                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4333                 goto out;
4334         } else if (!rc) { /* there is no EA in the file */
4335                 ksmbd_debug(SMB, "no ea data in the file\n");
4336                 goto done;
4337         }
4338         xattr_list_len = rc;
4339
4340         ptr = (char *)rsp->Buffer;
4341         eainfo = (struct smb2_ea_info *)ptr;
4342         prev_eainfo = eainfo;
4343         idx = 0;
4344
4345         while (idx < xattr_list_len) {
4346                 name = xattr_list + idx;
4347                 name_len = strlen(name);
4348
4349                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4350                 idx += name_len + 1;
4351
4352                 /*
4353                  * CIFS does not support EA other than user.* namespace,
4354                  * still keep the framework generic, to list other attrs
4355                  * in future.
4356                  */
4357                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4358                         continue;
4359
4360                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4361                              STREAM_PREFIX_LEN))
4362                         continue;
4363
4364                 if (req->InputBufferLength &&
4365                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4366                             ea_req->EaNameLength))
4367                         continue;
4368
4369                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4370                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4371                         continue;
4372
4373                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4374                         name_len -= XATTR_USER_PREFIX_LEN;
4375
4376                 ptr = eainfo->name + name_len + 1;
4377                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4378                                 name_len + 1);
4379                 /* bailout if xattr can't fit in buf_free_len */
4380                 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4381                                                name, &buf);
4382                 if (value_len <= 0) {
4383                         rc = -ENOENT;
4384                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4385                         goto out;
4386                 }
4387
4388                 buf_free_len -= value_len;
4389                 if (buf_free_len < 0) {
4390                         kfree(buf);
4391                         break;
4392                 }
4393
4394                 memcpy(ptr, buf, value_len);
4395                 kfree(buf);
4396
4397                 ptr += value_len;
4398                 eainfo->Flags = 0;
4399                 eainfo->EaNameLength = name_len;
4400
4401                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4402                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4403                                name_len);
4404                 else
4405                         memcpy(eainfo->name, name, name_len);
4406
4407                 eainfo->name[name_len] = '\0';
4408                 eainfo->EaValueLength = cpu_to_le16(value_len);
4409                 next_offset = offsetof(struct smb2_ea_info, name) +
4410                         name_len + 1 + value_len;
4411
4412                 /* align next xattr entry at 4 byte bundary */
4413                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4414                 if (alignment_bytes) {
4415                         memset(ptr, '\0', alignment_bytes);
4416                         ptr += alignment_bytes;
4417                         next_offset += alignment_bytes;
4418                         buf_free_len -= alignment_bytes;
4419                 }
4420                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4421                 prev_eainfo = eainfo;
4422                 eainfo = (struct smb2_ea_info *)ptr;
4423                 rsp_data_cnt += next_offset;
4424
4425                 if (req->InputBufferLength) {
4426                         ksmbd_debug(SMB, "single entry requested\n");
4427                         break;
4428                 }
4429         }
4430
4431         /* no more ea entries */
4432         prev_eainfo->NextEntryOffset = 0;
4433 done:
4434         rc = 0;
4435         if (rsp_data_cnt == 0)
4436                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4437         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4438 out:
4439         kvfree(xattr_list);
4440         return rc;
4441 }
4442
4443 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4444                                  struct ksmbd_file *fp, void *rsp_org)
4445 {
4446         struct smb2_file_access_info *file_info;
4447
4448         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4449         file_info->AccessFlags = fp->daccess;
4450         rsp->OutputBufferLength =
4451                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4452 }
4453
4454 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4455                                struct ksmbd_file *fp, void *rsp_org)
4456 {
4457         struct smb2_file_basic_info *basic_info;
4458         struct kstat stat;
4459         u64 time;
4460
4461         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4462                 pr_err("no right to read the attributes : 0x%x\n",
4463                        fp->daccess);
4464                 return -EACCES;
4465         }
4466
4467         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4468         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4469                          file_inode(fp->filp), &stat);
4470         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4471         time = ksmbd_UnixTimeToNT(stat.atime);
4472         basic_info->LastAccessTime = cpu_to_le64(time);
4473         time = ksmbd_UnixTimeToNT(stat.mtime);
4474         basic_info->LastWriteTime = cpu_to_le64(time);
4475         time = ksmbd_UnixTimeToNT(stat.ctime);
4476         basic_info->ChangeTime = cpu_to_le64(time);
4477         basic_info->Attributes = fp->f_ci->m_fattr;
4478         basic_info->Pad1 = 0;
4479         rsp->OutputBufferLength =
4480                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4481         return 0;
4482 }
4483
4484 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4485                                    struct ksmbd_file *fp, void *rsp_org)
4486 {
4487         struct smb2_file_standard_info *sinfo;
4488         unsigned int delete_pending;
4489         struct inode *inode;
4490         struct kstat stat;
4491
4492         inode = file_inode(fp->filp);
4493         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4494
4495         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4496         delete_pending = ksmbd_inode_pending_delete(fp);
4497
4498         sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4499         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4500         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4501         sinfo->DeletePending = delete_pending;
4502         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4503         rsp->OutputBufferLength =
4504                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4505 }
4506
4507 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4508                                     void *rsp_org)
4509 {
4510         struct smb2_file_alignment_info *file_info;
4511
4512         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4513         file_info->AlignmentRequirement = 0;
4514         rsp->OutputBufferLength =
4515                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4516 }
4517
4518 static int get_file_all_info(struct ksmbd_work *work,
4519                              struct smb2_query_info_rsp *rsp,
4520                              struct ksmbd_file *fp,
4521                              void *rsp_org)
4522 {
4523         struct ksmbd_conn *conn = work->conn;
4524         struct smb2_file_all_info *file_info;
4525         unsigned int delete_pending;
4526         struct inode *inode;
4527         struct kstat stat;
4528         int conv_len;
4529         char *filename;
4530         u64 time;
4531
4532         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4533                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4534                             fp->daccess);
4535                 return -EACCES;
4536         }
4537
4538         filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4539         if (IS_ERR(filename))
4540                 return PTR_ERR(filename);
4541
4542         inode = file_inode(fp->filp);
4543         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4544
4545         ksmbd_debug(SMB, "filename = %s\n", filename);
4546         delete_pending = ksmbd_inode_pending_delete(fp);
4547         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4548
4549         file_info->CreationTime = cpu_to_le64(fp->create_time);
4550         time = ksmbd_UnixTimeToNT(stat.atime);
4551         file_info->LastAccessTime = cpu_to_le64(time);
4552         time = ksmbd_UnixTimeToNT(stat.mtime);
4553         file_info->LastWriteTime = cpu_to_le64(time);
4554         time = ksmbd_UnixTimeToNT(stat.ctime);
4555         file_info->ChangeTime = cpu_to_le64(time);
4556         file_info->Attributes = fp->f_ci->m_fattr;
4557         file_info->Pad1 = 0;
4558         file_info->AllocationSize =
4559                 cpu_to_le64(inode->i_blocks << 9);
4560         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4561         file_info->NumberOfLinks =
4562                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4563         file_info->DeletePending = delete_pending;
4564         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4565         file_info->Pad2 = 0;
4566         file_info->IndexNumber = cpu_to_le64(stat.ino);
4567         file_info->EASize = 0;
4568         file_info->AccessFlags = fp->daccess;
4569         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4570         file_info->Mode = fp->coption;
4571         file_info->AlignmentRequirement = 0;
4572         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4573                                      PATH_MAX, conn->local_nls, 0);
4574         conv_len *= 2;
4575         file_info->FileNameLength = cpu_to_le32(conv_len);
4576         rsp->OutputBufferLength =
4577                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4578         kfree(filename);
4579         return 0;
4580 }
4581
4582 static void get_file_alternate_info(struct ksmbd_work *work,
4583                                     struct smb2_query_info_rsp *rsp,
4584                                     struct ksmbd_file *fp,
4585                                     void *rsp_org)
4586 {
4587         struct ksmbd_conn *conn = work->conn;
4588         struct smb2_file_alt_name_info *file_info;
4589         struct dentry *dentry = fp->filp->f_path.dentry;
4590         int conv_len;
4591
4592         spin_lock(&dentry->d_lock);
4593         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4594         conv_len = ksmbd_extract_shortname(conn,
4595                                            dentry->d_name.name,
4596                                            file_info->FileName);
4597         spin_unlock(&dentry->d_lock);
4598         file_info->FileNameLength = cpu_to_le32(conv_len);
4599         rsp->OutputBufferLength =
4600                 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4601 }
4602
4603 static void get_file_stream_info(struct ksmbd_work *work,
4604                                  struct smb2_query_info_rsp *rsp,
4605                                  struct ksmbd_file *fp,
4606                                  void *rsp_org)
4607 {
4608         struct ksmbd_conn *conn = work->conn;
4609         struct smb2_file_stream_info *file_info;
4610         char *stream_name, *xattr_list = NULL, *stream_buf;
4611         struct kstat stat;
4612         const struct path *path = &fp->filp->f_path;
4613         ssize_t xattr_list_len;
4614         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4615         int buf_free_len;
4616         struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4617
4618         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4619                          file_inode(fp->filp), &stat);
4620         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4621
4622         buf_free_len =
4623                 smb2_calc_max_out_buf_len(work, 8,
4624                                           le32_to_cpu(req->OutputBufferLength));
4625         if (buf_free_len < 0)
4626                 goto out;
4627
4628         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4629         if (xattr_list_len < 0) {
4630                 goto out;
4631         } else if (!xattr_list_len) {
4632                 ksmbd_debug(SMB, "empty xattr in the file\n");
4633                 goto out;
4634         }
4635
4636         while (idx < xattr_list_len) {
4637                 stream_name = xattr_list + idx;
4638                 streamlen = strlen(stream_name);
4639                 idx += streamlen + 1;
4640
4641                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4642
4643                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4644                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4645                         continue;
4646
4647                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4648                                 STREAM_PREFIX_LEN);
4649                 streamlen = stream_name_len;
4650
4651                 /* plus : size */
4652                 streamlen += 1;
4653                 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4654                 if (!stream_buf)
4655                         break;
4656
4657                 streamlen = snprintf(stream_buf, streamlen + 1,
4658                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4659
4660                 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4661                 if (next > buf_free_len) {
4662                         kfree(stream_buf);
4663                         break;
4664                 }
4665
4666                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4667                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4668                                                stream_buf, streamlen,
4669                                                conn->local_nls, 0);
4670                 streamlen *= 2;
4671                 kfree(stream_buf);
4672                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4673                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4674                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4675
4676                 nbytes += next;
4677                 buf_free_len -= next;
4678                 file_info->NextEntryOffset = cpu_to_le32(next);
4679         }
4680
4681 out:
4682         if (!S_ISDIR(stat.mode) &&
4683             buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4684                 file_info = (struct smb2_file_stream_info *)
4685                         &rsp->Buffer[nbytes];
4686                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4687                                               "::$DATA", 7, conn->local_nls, 0);
4688                 streamlen *= 2;
4689                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4690                 file_info->StreamSize = cpu_to_le64(stat.size);
4691                 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4692                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4693         }
4694
4695         /* last entry offset should be 0 */
4696         file_info->NextEntryOffset = 0;
4697         kvfree(xattr_list);
4698
4699         rsp->OutputBufferLength = cpu_to_le32(nbytes);
4700 }
4701
4702 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4703                                    struct ksmbd_file *fp, void *rsp_org)
4704 {
4705         struct smb2_file_internal_info *file_info;
4706         struct kstat stat;
4707
4708         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4709                          file_inode(fp->filp), &stat);
4710         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4711         file_info->IndexNumber = cpu_to_le64(stat.ino);
4712         rsp->OutputBufferLength =
4713                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4714 }
4715
4716 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4717                                       struct ksmbd_file *fp, void *rsp_org)
4718 {
4719         struct smb2_file_ntwrk_info *file_info;
4720         struct inode *inode;
4721         struct kstat stat;
4722         u64 time;
4723
4724         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4725                 pr_err("no right to read the attributes : 0x%x\n",
4726                        fp->daccess);
4727                 return -EACCES;
4728         }
4729
4730         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4731
4732         inode = file_inode(fp->filp);
4733         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4734
4735         file_info->CreationTime = cpu_to_le64(fp->create_time);
4736         time = ksmbd_UnixTimeToNT(stat.atime);
4737         file_info->LastAccessTime = cpu_to_le64(time);
4738         time = ksmbd_UnixTimeToNT(stat.mtime);
4739         file_info->LastWriteTime = cpu_to_le64(time);
4740         time = ksmbd_UnixTimeToNT(stat.ctime);
4741         file_info->ChangeTime = cpu_to_le64(time);
4742         file_info->Attributes = fp->f_ci->m_fattr;
4743         file_info->AllocationSize =
4744                 cpu_to_le64(inode->i_blocks << 9);
4745         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4746         file_info->Reserved = cpu_to_le32(0);
4747         rsp->OutputBufferLength =
4748                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4749         return 0;
4750 }
4751
4752 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4753 {
4754         struct smb2_file_ea_info *file_info;
4755
4756         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4757         file_info->EASize = 0;
4758         rsp->OutputBufferLength =
4759                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4760 }
4761
4762 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4763                                    struct ksmbd_file *fp, void *rsp_org)
4764 {
4765         struct smb2_file_pos_info *file_info;
4766
4767         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4768         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4769         rsp->OutputBufferLength =
4770                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4771 }
4772
4773 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4774                                struct ksmbd_file *fp, void *rsp_org)
4775 {
4776         struct smb2_file_mode_info *file_info;
4777
4778         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4779         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4780         rsp->OutputBufferLength =
4781                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4782 }
4783
4784 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4785                                       struct ksmbd_file *fp, void *rsp_org)
4786 {
4787         struct smb2_file_comp_info *file_info;
4788         struct kstat stat;
4789
4790         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4791                          file_inode(fp->filp), &stat);
4792
4793         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4794         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4795         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4796         file_info->CompressionUnitShift = 0;
4797         file_info->ChunkShift = 0;
4798         file_info->ClusterShift = 0;
4799         memset(&file_info->Reserved[0], 0, 3);
4800
4801         rsp->OutputBufferLength =
4802                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4803 }
4804
4805 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4806                                        struct ksmbd_file *fp, void *rsp_org)
4807 {
4808         struct smb2_file_attr_tag_info *file_info;
4809
4810         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4811                 pr_err("no right to read the attributes : 0x%x\n",
4812                        fp->daccess);
4813                 return -EACCES;
4814         }
4815
4816         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4817         file_info->FileAttributes = fp->f_ci->m_fattr;
4818         file_info->ReparseTag = 0;
4819         rsp->OutputBufferLength =
4820                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4821         return 0;
4822 }
4823
4824 static void find_file_posix_info(struct smb2_query_info_rsp *rsp,
4825                                 struct ksmbd_file *fp, void *rsp_org)
4826 {
4827         struct smb311_posix_qinfo *file_info;
4828         struct inode *inode = file_inode(fp->filp);
4829         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4830         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
4831         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
4832         u64 time;
4833         int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
4834
4835         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4836         file_info->CreationTime = cpu_to_le64(fp->create_time);
4837         time = ksmbd_UnixTimeToNT(inode->i_atime);
4838         file_info->LastAccessTime = cpu_to_le64(time);
4839         time = ksmbd_UnixTimeToNT(inode->i_mtime);
4840         file_info->LastWriteTime = cpu_to_le64(time);
4841         time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
4842         file_info->ChangeTime = cpu_to_le64(time);
4843         file_info->DosAttributes = fp->f_ci->m_fattr;
4844         file_info->Inode = cpu_to_le64(inode->i_ino);
4845         file_info->EndOfFile = cpu_to_le64(inode->i_size);
4846         file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4847         file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4848         file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
4849         file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4850
4851         /*
4852          * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4853          * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4854          *                sub_auth(4 * 1(num_subauth)) + RID(4).
4855          */
4856         id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
4857                   SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
4858         id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
4859                   SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
4860
4861         rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
4862 }
4863
4864 static int smb2_get_info_file(struct ksmbd_work *work,
4865                               struct smb2_query_info_req *req,
4866                               struct smb2_query_info_rsp *rsp)
4867 {
4868         struct ksmbd_file *fp;
4869         int fileinfoclass = 0;
4870         int rc = 0;
4871         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4872
4873         if (test_share_config_flag(work->tcon->share_conf,
4874                                    KSMBD_SHARE_FLAG_PIPE)) {
4875                 /* smb2 info file called for pipe */
4876                 return smb2_get_info_file_pipe(work->sess, req, rsp,
4877                                                work->response_buf);
4878         }
4879
4880         if (work->next_smb2_rcv_hdr_off) {
4881                 if (!has_file_id(req->VolatileFileId)) {
4882                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4883                                     work->compound_fid);
4884                         id = work->compound_fid;
4885                         pid = work->compound_pfid;
4886                 }
4887         }
4888
4889         if (!has_file_id(id)) {
4890                 id = req->VolatileFileId;
4891                 pid = req->PersistentFileId;
4892         }
4893
4894         fp = ksmbd_lookup_fd_slow(work, id, pid);
4895         if (!fp)
4896                 return -ENOENT;
4897
4898         fileinfoclass = req->FileInfoClass;
4899
4900         switch (fileinfoclass) {
4901         case FILE_ACCESS_INFORMATION:
4902                 get_file_access_info(rsp, fp, work->response_buf);
4903                 break;
4904
4905         case FILE_BASIC_INFORMATION:
4906                 rc = get_file_basic_info(rsp, fp, work->response_buf);
4907                 break;
4908
4909         case FILE_STANDARD_INFORMATION:
4910                 get_file_standard_info(rsp, fp, work->response_buf);
4911                 break;
4912
4913         case FILE_ALIGNMENT_INFORMATION:
4914                 get_file_alignment_info(rsp, work->response_buf);
4915                 break;
4916
4917         case FILE_ALL_INFORMATION:
4918                 rc = get_file_all_info(work, rsp, fp, work->response_buf);
4919                 break;
4920
4921         case FILE_ALTERNATE_NAME_INFORMATION:
4922                 get_file_alternate_info(work, rsp, fp, work->response_buf);
4923                 break;
4924
4925         case FILE_STREAM_INFORMATION:
4926                 get_file_stream_info(work, rsp, fp, work->response_buf);
4927                 break;
4928
4929         case FILE_INTERNAL_INFORMATION:
4930                 get_file_internal_info(rsp, fp, work->response_buf);
4931                 break;
4932
4933         case FILE_NETWORK_OPEN_INFORMATION:
4934                 rc = get_file_network_open_info(rsp, fp, work->response_buf);
4935                 break;
4936
4937         case FILE_EA_INFORMATION:
4938                 get_file_ea_info(rsp, work->response_buf);
4939                 break;
4940
4941         case FILE_FULL_EA_INFORMATION:
4942                 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4943                 break;
4944
4945         case FILE_POSITION_INFORMATION:
4946                 get_file_position_info(rsp, fp, work->response_buf);
4947                 break;
4948
4949         case FILE_MODE_INFORMATION:
4950                 get_file_mode_info(rsp, fp, work->response_buf);
4951                 break;
4952
4953         case FILE_COMPRESSION_INFORMATION:
4954                 get_file_compression_info(rsp, fp, work->response_buf);
4955                 break;
4956
4957         case FILE_ATTRIBUTE_TAG_INFORMATION:
4958                 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4959                 break;
4960         case SMB_FIND_FILE_POSIX_INFO:
4961                 if (!work->tcon->posix_extensions) {
4962                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4963                         rc = -EOPNOTSUPP;
4964                 } else {
4965                         find_file_posix_info(rsp, fp, work->response_buf);
4966                 }
4967                 break;
4968         default:
4969                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4970                             fileinfoclass);
4971                 rc = -EOPNOTSUPP;
4972         }
4973         if (!rc)
4974                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4975                                       rsp, work->response_buf);
4976         ksmbd_fd_put(work, fp);
4977         return rc;
4978 }
4979
4980 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4981                                     struct smb2_query_info_req *req,
4982                                     struct smb2_query_info_rsp *rsp)
4983 {
4984         struct ksmbd_session *sess = work->sess;
4985         struct ksmbd_conn *conn = work->conn;
4986         struct ksmbd_share_config *share = work->tcon->share_conf;
4987         int fsinfoclass = 0;
4988         struct kstatfs stfs;
4989         struct path path;
4990         int rc = 0, len;
4991
4992         if (!share->path)
4993                 return -EIO;
4994
4995         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
4996         if (rc) {
4997                 pr_err("cannot create vfs path\n");
4998                 return -EIO;
4999         }
5000
5001         rc = vfs_statfs(&path, &stfs);
5002         if (rc) {
5003                 pr_err("cannot do stat of path %s\n", share->path);
5004                 path_put(&path);
5005                 return -EIO;
5006         }
5007
5008         fsinfoclass = req->FileInfoClass;
5009
5010         switch (fsinfoclass) {
5011         case FS_DEVICE_INFORMATION:
5012         {
5013                 struct filesystem_device_info *info;
5014
5015                 info = (struct filesystem_device_info *)rsp->Buffer;
5016
5017                 info->DeviceType = cpu_to_le32(stfs.f_type);
5018                 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
5019                 rsp->OutputBufferLength = cpu_to_le32(8);
5020                 break;
5021         }
5022         case FS_ATTRIBUTE_INFORMATION:
5023         {
5024                 struct filesystem_attribute_info *info;
5025                 size_t sz;
5026
5027                 info = (struct filesystem_attribute_info *)rsp->Buffer;
5028                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5029                                                FILE_PERSISTENT_ACLS |
5030                                                FILE_UNICODE_ON_DISK |
5031                                                FILE_CASE_PRESERVED_NAMES |
5032                                                FILE_CASE_SENSITIVE_SEARCH |
5033                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
5034
5035                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5036
5037                 if (test_share_config_flag(work->tcon->share_conf,
5038                     KSMBD_SHARE_FLAG_STREAMS))
5039                         info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5040
5041                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5042                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5043                                         "NTFS", PATH_MAX, conn->local_nls, 0);
5044                 len = len * 2;
5045                 info->FileSystemNameLen = cpu_to_le32(len);
5046                 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5047                 rsp->OutputBufferLength = cpu_to_le32(sz);
5048                 break;
5049         }
5050         case FS_VOLUME_INFORMATION:
5051         {
5052                 struct filesystem_vol_info *info;
5053                 size_t sz;
5054                 unsigned int serial_crc = 0;
5055
5056                 info = (struct filesystem_vol_info *)(rsp->Buffer);
5057                 info->VolumeCreationTime = 0;
5058                 serial_crc = crc32_le(serial_crc, share->name,
5059                                       strlen(share->name));
5060                 serial_crc = crc32_le(serial_crc, share->path,
5061                                       strlen(share->path));
5062                 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5063                                       strlen(ksmbd_netbios_name()));
5064                 /* Taking dummy value of serial number*/
5065                 info->SerialNumber = cpu_to_le32(serial_crc);
5066                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5067                                         share->name, PATH_MAX,
5068                                         conn->local_nls, 0);
5069                 len = len * 2;
5070                 info->VolumeLabelSize = cpu_to_le32(len);
5071                 info->Reserved = 0;
5072                 sz = sizeof(struct filesystem_vol_info) - 2 + len;
5073                 rsp->OutputBufferLength = cpu_to_le32(sz);
5074                 break;
5075         }
5076         case FS_SIZE_INFORMATION:
5077         {
5078                 struct filesystem_info *info;
5079
5080                 info = (struct filesystem_info *)(rsp->Buffer);
5081                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5082                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5083                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5084                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5085                 rsp->OutputBufferLength = cpu_to_le32(24);
5086                 break;
5087         }
5088         case FS_FULL_SIZE_INFORMATION:
5089         {
5090                 struct smb2_fs_full_size_info *info;
5091
5092                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5093                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5094                 info->CallerAvailableAllocationUnits =
5095                                         cpu_to_le64(stfs.f_bavail);
5096                 info->ActualAvailableAllocationUnits =
5097                                         cpu_to_le64(stfs.f_bfree);
5098                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5099                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5100                 rsp->OutputBufferLength = cpu_to_le32(32);
5101                 break;
5102         }
5103         case FS_OBJECT_ID_INFORMATION:
5104         {
5105                 struct object_id_info *info;
5106
5107                 info = (struct object_id_info *)(rsp->Buffer);
5108
5109                 if (!user_guest(sess->user))
5110                         memcpy(info->objid, user_passkey(sess->user), 16);
5111                 else
5112                         memset(info->objid, 0, 16);
5113
5114                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5115                 info->extended_info.version = cpu_to_le32(1);
5116                 info->extended_info.release = cpu_to_le32(1);
5117                 info->extended_info.rel_date = 0;
5118                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5119                 rsp->OutputBufferLength = cpu_to_le32(64);
5120                 break;
5121         }
5122         case FS_SECTOR_SIZE_INFORMATION:
5123         {
5124                 struct smb3_fs_ss_info *info;
5125                 unsigned int sector_size =
5126                         min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5127
5128                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5129
5130                 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5131                 info->PhysicalBytesPerSectorForAtomicity =
5132                                 cpu_to_le32(sector_size);
5133                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5134                 info->FSEffPhysicalBytesPerSectorForAtomicity =
5135                                 cpu_to_le32(sector_size);
5136                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5137                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5138                 info->ByteOffsetForSectorAlignment = 0;
5139                 info->ByteOffsetForPartitionAlignment = 0;
5140                 rsp->OutputBufferLength = cpu_to_le32(28);
5141                 break;
5142         }
5143         case FS_CONTROL_INFORMATION:
5144         {
5145                 /*
5146                  * TODO : The current implementation is based on
5147                  * test result with win7(NTFS) server. It's need to
5148                  * modify this to get valid Quota values
5149                  * from Linux kernel
5150                  */
5151                 struct smb2_fs_control_info *info;
5152
5153                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5154                 info->FreeSpaceStartFiltering = 0;
5155                 info->FreeSpaceThreshold = 0;
5156                 info->FreeSpaceStopFiltering = 0;
5157                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5158                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5159                 info->Padding = 0;
5160                 rsp->OutputBufferLength = cpu_to_le32(48);
5161                 break;
5162         }
5163         case FS_POSIX_INFORMATION:
5164         {
5165                 struct filesystem_posix_info *info;
5166
5167                 if (!work->tcon->posix_extensions) {
5168                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5169                         rc = -EOPNOTSUPP;
5170                 } else {
5171                         info = (struct filesystem_posix_info *)(rsp->Buffer);
5172                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5173                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
5174                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5175                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5176                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5177                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5178                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5179                         rsp->OutputBufferLength = cpu_to_le32(56);
5180                 }
5181                 break;
5182         }
5183         default:
5184                 path_put(&path);
5185                 return -EOPNOTSUPP;
5186         }
5187         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5188                               rsp, work->response_buf);
5189         path_put(&path);
5190         return rc;
5191 }
5192
5193 static int smb2_get_info_sec(struct ksmbd_work *work,
5194                              struct smb2_query_info_req *req,
5195                              struct smb2_query_info_rsp *rsp)
5196 {
5197         struct ksmbd_file *fp;
5198         struct mnt_idmap *idmap;
5199         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5200         struct smb_fattr fattr = {{0}};
5201         struct inode *inode;
5202         __u32 secdesclen = 0;
5203         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5204         int addition_info = le32_to_cpu(req->AdditionalInformation);
5205         int rc = 0, ppntsd_size = 0;
5206
5207         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5208                               PROTECTED_DACL_SECINFO |
5209                               UNPROTECTED_DACL_SECINFO)) {
5210                 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5211                        addition_info);
5212
5213                 pntsd->revision = cpu_to_le16(1);
5214                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5215                 pntsd->osidoffset = 0;
5216                 pntsd->gsidoffset = 0;
5217                 pntsd->sacloffset = 0;
5218                 pntsd->dacloffset = 0;
5219
5220                 secdesclen = sizeof(struct smb_ntsd);
5221                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5222
5223                 return 0;
5224         }
5225
5226         if (work->next_smb2_rcv_hdr_off) {
5227                 if (!has_file_id(req->VolatileFileId)) {
5228                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5229                                     work->compound_fid);
5230                         id = work->compound_fid;
5231                         pid = work->compound_pfid;
5232                 }
5233         }
5234
5235         if (!has_file_id(id)) {
5236                 id = req->VolatileFileId;
5237                 pid = req->PersistentFileId;
5238         }
5239
5240         fp = ksmbd_lookup_fd_slow(work, id, pid);
5241         if (!fp)
5242                 return -ENOENT;
5243
5244         idmap = file_mnt_idmap(fp->filp);
5245         inode = file_inode(fp->filp);
5246         ksmbd_acls_fattr(&fattr, idmap, inode);
5247
5248         if (test_share_config_flag(work->tcon->share_conf,
5249                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5250                 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5251                                                      fp->filp->f_path.dentry,
5252                                                      &ppntsd);
5253
5254         /* Check if sd buffer size exceeds response buffer size */
5255         if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5256                 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5257                                     addition_info, &secdesclen, &fattr);
5258         posix_acl_release(fattr.cf_acls);
5259         posix_acl_release(fattr.cf_dacls);
5260         kfree(ppntsd);
5261         ksmbd_fd_put(work, fp);
5262         if (rc)
5263                 return rc;
5264
5265         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5266         return 0;
5267 }
5268
5269 /**
5270  * smb2_query_info() - handler for smb2 query info command
5271  * @work:       smb work containing query info request buffer
5272  *
5273  * Return:      0 on success, otherwise error
5274  */
5275 int smb2_query_info(struct ksmbd_work *work)
5276 {
5277         struct smb2_query_info_req *req;
5278         struct smb2_query_info_rsp *rsp;
5279         int rc = 0;
5280
5281         WORK_BUFFERS(work, req, rsp);
5282
5283         ksmbd_debug(SMB, "GOT query info request\n");
5284
5285         switch (req->InfoType) {
5286         case SMB2_O_INFO_FILE:
5287                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5288                 rc = smb2_get_info_file(work, req, rsp);
5289                 break;
5290         case SMB2_O_INFO_FILESYSTEM:
5291                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5292                 rc = smb2_get_info_filesystem(work, req, rsp);
5293                 break;
5294         case SMB2_O_INFO_SECURITY:
5295                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5296                 rc = smb2_get_info_sec(work, req, rsp);
5297                 break;
5298         default:
5299                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5300                             req->InfoType);
5301                 rc = -EOPNOTSUPP;
5302         }
5303
5304         if (!rc) {
5305                 rsp->StructureSize = cpu_to_le16(9);
5306                 rsp->OutputBufferOffset = cpu_to_le16(72);
5307                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5308                                        offsetof(struct smb2_query_info_rsp, Buffer) +
5309                                         le32_to_cpu(rsp->OutputBufferLength));
5310         }
5311
5312         if (rc < 0) {
5313                 if (rc == -EACCES)
5314                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5315                 else if (rc == -ENOENT)
5316                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5317                 else if (rc == -EIO)
5318                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5319                 else if (rc == -ENOMEM)
5320                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5321                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5322                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5323                 smb2_set_err_rsp(work);
5324
5325                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5326                             rc);
5327                 return rc;
5328         }
5329         return 0;
5330 }
5331
5332 /**
5333  * smb2_close_pipe() - handler for closing IPC pipe
5334  * @work:       smb work containing close request buffer
5335  *
5336  * Return:      0
5337  */
5338 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5339 {
5340         u64 id;
5341         struct smb2_close_req *req;
5342         struct smb2_close_rsp *rsp;
5343
5344         WORK_BUFFERS(work, req, rsp);
5345
5346         id = req->VolatileFileId;
5347         ksmbd_session_rpc_close(work->sess, id);
5348
5349         rsp->StructureSize = cpu_to_le16(60);
5350         rsp->Flags = 0;
5351         rsp->Reserved = 0;
5352         rsp->CreationTime = 0;
5353         rsp->LastAccessTime = 0;
5354         rsp->LastWriteTime = 0;
5355         rsp->ChangeTime = 0;
5356         rsp->AllocationSize = 0;
5357         rsp->EndOfFile = 0;
5358         rsp->Attributes = 0;
5359
5360         return ksmbd_iov_pin_rsp(work, (void *)rsp,
5361                                  sizeof(struct smb2_close_rsp));
5362 }
5363
5364 /**
5365  * smb2_close() - handler for smb2 close file command
5366  * @work:       smb work containing close request buffer
5367  *
5368  * Return:      0
5369  */
5370 int smb2_close(struct ksmbd_work *work)
5371 {
5372         u64 volatile_id = KSMBD_NO_FID;
5373         u64 sess_id;
5374         struct smb2_close_req *req;
5375         struct smb2_close_rsp *rsp;
5376         struct ksmbd_conn *conn = work->conn;
5377         struct ksmbd_file *fp;
5378         struct inode *inode;
5379         u64 time;
5380         int err = 0;
5381
5382         WORK_BUFFERS(work, req, rsp);
5383
5384         if (test_share_config_flag(work->tcon->share_conf,
5385                                    KSMBD_SHARE_FLAG_PIPE)) {
5386                 ksmbd_debug(SMB, "IPC pipe close request\n");
5387                 return smb2_close_pipe(work);
5388         }
5389
5390         sess_id = le64_to_cpu(req->hdr.SessionId);
5391         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5392                 sess_id = work->compound_sid;
5393
5394         work->compound_sid = 0;
5395         if (check_session_id(conn, sess_id)) {
5396                 work->compound_sid = sess_id;
5397         } else {
5398                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5399                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5400                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5401                 err = -EBADF;
5402                 goto out;
5403         }
5404
5405         if (work->next_smb2_rcv_hdr_off &&
5406             !has_file_id(req->VolatileFileId)) {
5407                 if (!has_file_id(work->compound_fid)) {
5408                         /* file already closed, return FILE_CLOSED */
5409                         ksmbd_debug(SMB, "file already closed\n");
5410                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5411                         err = -EBADF;
5412                         goto out;
5413                 } else {
5414                         ksmbd_debug(SMB,
5415                                     "Compound request set FID = %llu:%llu\n",
5416                                     work->compound_fid,
5417                                     work->compound_pfid);
5418                         volatile_id = work->compound_fid;
5419
5420                         /* file closed, stored id is not valid anymore */
5421                         work->compound_fid = KSMBD_NO_FID;
5422                         work->compound_pfid = KSMBD_NO_FID;
5423                 }
5424         } else {
5425                 volatile_id = req->VolatileFileId;
5426         }
5427         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5428
5429         rsp->StructureSize = cpu_to_le16(60);
5430         rsp->Reserved = 0;
5431
5432         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5433                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5434                 if (!fp) {
5435                         err = -ENOENT;
5436                         goto out;
5437                 }
5438
5439                 inode = file_inode(fp->filp);
5440                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5441                 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5442                         cpu_to_le64(inode->i_blocks << 9);
5443                 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5444                 rsp->Attributes = fp->f_ci->m_fattr;
5445                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5446                 time = ksmbd_UnixTimeToNT(inode->i_atime);
5447                 rsp->LastAccessTime = cpu_to_le64(time);
5448                 time = ksmbd_UnixTimeToNT(inode->i_mtime);
5449                 rsp->LastWriteTime = cpu_to_le64(time);
5450                 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
5451                 rsp->ChangeTime = cpu_to_le64(time);
5452                 ksmbd_fd_put(work, fp);
5453         } else {
5454                 rsp->Flags = 0;
5455                 rsp->AllocationSize = 0;
5456                 rsp->EndOfFile = 0;
5457                 rsp->Attributes = 0;
5458                 rsp->CreationTime = 0;
5459                 rsp->LastAccessTime = 0;
5460                 rsp->LastWriteTime = 0;
5461                 rsp->ChangeTime = 0;
5462         }
5463
5464         err = ksmbd_close_fd(work, volatile_id);
5465 out:
5466         if (!err)
5467                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5468                                         sizeof(struct smb2_close_rsp));
5469
5470         if (err) {
5471                 if (rsp->hdr.Status == 0)
5472                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5473                 smb2_set_err_rsp(work);
5474         }
5475
5476         return err;
5477 }
5478
5479 /**
5480  * smb2_echo() - handler for smb2 echo(ping) command
5481  * @work:       smb work containing echo request buffer
5482  *
5483  * Return:      0
5484  */
5485 int smb2_echo(struct ksmbd_work *work)
5486 {
5487         struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5488
5489         if (work->next_smb2_rcv_hdr_off)
5490                 rsp = ksmbd_resp_buf_next(work);
5491
5492         rsp->StructureSize = cpu_to_le16(4);
5493         rsp->Reserved = 0;
5494         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5495 }
5496
5497 static int smb2_rename(struct ksmbd_work *work,
5498                        struct ksmbd_file *fp,
5499                        struct smb2_file_rename_info *file_info,
5500                        struct nls_table *local_nls)
5501 {
5502         struct ksmbd_share_config *share = fp->tcon->share_conf;
5503         char *new_name = NULL;
5504         int rc, flags = 0;
5505
5506         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5507         new_name = smb2_get_name(file_info->FileName,
5508                                  le32_to_cpu(file_info->FileNameLength),
5509                                  local_nls);
5510         if (IS_ERR(new_name))
5511                 return PTR_ERR(new_name);
5512
5513         if (strchr(new_name, ':')) {
5514                 int s_type;
5515                 char *xattr_stream_name, *stream_name = NULL;
5516                 size_t xattr_stream_size;
5517                 int len;
5518
5519                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5520                 if (rc < 0)
5521                         goto out;
5522
5523                 len = strlen(new_name);
5524                 if (len > 0 && new_name[len - 1] != '/') {
5525                         pr_err("not allow base filename in rename\n");
5526                         rc = -ESHARE;
5527                         goto out;
5528                 }
5529
5530                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5531                                                  &xattr_stream_name,
5532                                                  &xattr_stream_size,
5533                                                  s_type);
5534                 if (rc)
5535                         goto out;
5536
5537                 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5538                                         &fp->filp->f_path,
5539                                         xattr_stream_name,
5540                                         NULL, 0, 0);
5541                 if (rc < 0) {
5542                         pr_err("failed to store stream name in xattr: %d\n",
5543                                rc);
5544                         rc = -EINVAL;
5545                         goto out;
5546                 }
5547
5548                 goto out;
5549         }
5550
5551         ksmbd_debug(SMB, "new name %s\n", new_name);
5552         if (ksmbd_share_veto_filename(share, new_name)) {
5553                 rc = -ENOENT;
5554                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5555                 goto out;
5556         }
5557
5558         if (!file_info->ReplaceIfExists)
5559                 flags = RENAME_NOREPLACE;
5560
5561         rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5562 out:
5563         kfree(new_name);
5564         return rc;
5565 }
5566
5567 static int smb2_create_link(struct ksmbd_work *work,
5568                             struct ksmbd_share_config *share,
5569                             struct smb2_file_link_info *file_info,
5570                             unsigned int buf_len, struct file *filp,
5571                             struct nls_table *local_nls)
5572 {
5573         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5574         struct path path, parent_path;
5575         bool file_present = false;
5576         int rc;
5577
5578         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5579                         le32_to_cpu(file_info->FileNameLength))
5580                 return -EINVAL;
5581
5582         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5583         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5584         if (!pathname)
5585                 return -ENOMEM;
5586
5587         link_name = smb2_get_name(file_info->FileName,
5588                                   le32_to_cpu(file_info->FileNameLength),
5589                                   local_nls);
5590         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5591                 rc = -EINVAL;
5592                 goto out;
5593         }
5594
5595         ksmbd_debug(SMB, "link name is %s\n", link_name);
5596         target_name = file_path(filp, pathname, PATH_MAX);
5597         if (IS_ERR(target_name)) {
5598                 rc = -EINVAL;
5599                 goto out;
5600         }
5601
5602         ksmbd_debug(SMB, "target name is %s\n", target_name);
5603         rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5604                                         &parent_path, &path, 0);
5605         if (rc) {
5606                 if (rc != -ENOENT)
5607                         goto out;
5608         } else
5609                 file_present = true;
5610
5611         if (file_info->ReplaceIfExists) {
5612                 if (file_present) {
5613                         rc = ksmbd_vfs_remove_file(work, &path);
5614                         if (rc) {
5615                                 rc = -EINVAL;
5616                                 ksmbd_debug(SMB, "cannot delete %s\n",
5617                                             link_name);
5618                                 goto out;
5619                         }
5620                 }
5621         } else {
5622                 if (file_present) {
5623                         rc = -EEXIST;
5624                         ksmbd_debug(SMB, "link already exists\n");
5625                         goto out;
5626                 }
5627         }
5628
5629         rc = ksmbd_vfs_link(work, target_name, link_name);
5630         if (rc)
5631                 rc = -EINVAL;
5632 out:
5633         if (file_present) {
5634                 inode_unlock(d_inode(parent_path.dentry));
5635                 path_put(&path);
5636                 path_put(&parent_path);
5637         }
5638         if (!IS_ERR(link_name))
5639                 kfree(link_name);
5640         kfree(pathname);
5641         return rc;
5642 }
5643
5644 static int set_file_basic_info(struct ksmbd_file *fp,
5645                                struct smb2_file_basic_info *file_info,
5646                                struct ksmbd_share_config *share)
5647 {
5648         struct iattr attrs;
5649         struct file *filp;
5650         struct inode *inode;
5651         struct mnt_idmap *idmap;
5652         int rc = 0;
5653
5654         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5655                 return -EACCES;
5656
5657         attrs.ia_valid = 0;
5658         filp = fp->filp;
5659         inode = file_inode(filp);
5660         idmap = file_mnt_idmap(filp);
5661
5662         if (file_info->CreationTime)
5663                 fp->create_time = le64_to_cpu(file_info->CreationTime);
5664
5665         if (file_info->LastAccessTime) {
5666                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5667                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5668         }
5669
5670         attrs.ia_valid |= ATTR_CTIME;
5671         if (file_info->ChangeTime)
5672                 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5673         else
5674                 attrs.ia_ctime = inode_get_ctime(inode);
5675
5676         if (file_info->LastWriteTime) {
5677                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5678                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5679         }
5680
5681         if (file_info->Attributes) {
5682                 if (!S_ISDIR(inode->i_mode) &&
5683                     file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5684                         pr_err("can't change a file to a directory\n");
5685                         return -EINVAL;
5686                 }
5687
5688                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5689                         fp->f_ci->m_fattr = file_info->Attributes |
5690                                 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5691         }
5692
5693         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5694             (file_info->CreationTime || file_info->Attributes)) {
5695                 struct xattr_dos_attrib da = {0};
5696
5697                 da.version = 4;
5698                 da.itime = fp->itime;
5699                 da.create_time = fp->create_time;
5700                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5701                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5702                         XATTR_DOSINFO_ITIME;
5703
5704                 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da);
5705                 if (rc)
5706                         ksmbd_debug(SMB,
5707                                     "failed to restore file attribute in EA\n");
5708                 rc = 0;
5709         }
5710
5711         if (attrs.ia_valid) {
5712                 struct dentry *dentry = filp->f_path.dentry;
5713                 struct inode *inode = d_inode(dentry);
5714
5715                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5716                         return -EACCES;
5717
5718                 inode_lock(inode);
5719                 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
5720                 attrs.ia_valid &= ~ATTR_CTIME;
5721                 rc = notify_change(idmap, dentry, &attrs, NULL);
5722                 inode_unlock(inode);
5723         }
5724         return rc;
5725 }
5726
5727 static int set_file_allocation_info(struct ksmbd_work *work,
5728                                     struct ksmbd_file *fp,
5729                                     struct smb2_file_alloc_info *file_alloc_info)
5730 {
5731         /*
5732          * TODO : It's working fine only when store dos attributes
5733          * is not yes. need to implement a logic which works
5734          * properly with any smb.conf option
5735          */
5736
5737         loff_t alloc_blks;
5738         struct inode *inode;
5739         int rc;
5740
5741         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5742                 return -EACCES;
5743
5744         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5745         inode = file_inode(fp->filp);
5746
5747         if (alloc_blks > inode->i_blocks) {
5748                 smb_break_all_levII_oplock(work, fp, 1);
5749                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5750                                    alloc_blks * 512);
5751                 if (rc && rc != -EOPNOTSUPP) {
5752                         pr_err("vfs_fallocate is failed : %d\n", rc);
5753                         return rc;
5754                 }
5755         } else if (alloc_blks < inode->i_blocks) {
5756                 loff_t size;
5757
5758                 /*
5759                  * Allocation size could be smaller than original one
5760                  * which means allocated blocks in file should be
5761                  * deallocated. use truncate to cut out it, but inode
5762                  * size is also updated with truncate offset.
5763                  * inode size is retained by backup inode size.
5764                  */
5765                 size = i_size_read(inode);
5766                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5767                 if (rc) {
5768                         pr_err("truncate failed!, err %d\n", rc);
5769                         return rc;
5770                 }
5771                 if (size < alloc_blks * 512)
5772                         i_size_write(inode, size);
5773         }
5774         return 0;
5775 }
5776
5777 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5778                                 struct smb2_file_eof_info *file_eof_info)
5779 {
5780         loff_t newsize;
5781         struct inode *inode;
5782         int rc;
5783
5784         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5785                 return -EACCES;
5786
5787         newsize = le64_to_cpu(file_eof_info->EndOfFile);
5788         inode = file_inode(fp->filp);
5789
5790         /*
5791          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5792          * on FAT32 shared device, truncate execution time is too long
5793          * and network error could cause from windows client. because
5794          * truncate of some filesystem like FAT32 fill zero data in
5795          * truncated range.
5796          */
5797         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5798                 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
5799                 rc = ksmbd_vfs_truncate(work, fp, newsize);
5800                 if (rc) {
5801                         ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
5802                         if (rc != -EAGAIN)
5803                                 rc = -EBADF;
5804                         return rc;
5805                 }
5806         }
5807         return 0;
5808 }
5809
5810 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5811                            struct smb2_file_rename_info *rename_info,
5812                            unsigned int buf_len)
5813 {
5814         if (!(fp->daccess & FILE_DELETE_LE)) {
5815                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5816                 return -EACCES;
5817         }
5818
5819         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5820                         le32_to_cpu(rename_info->FileNameLength))
5821                 return -EINVAL;
5822
5823         if (!le32_to_cpu(rename_info->FileNameLength))
5824                 return -EINVAL;
5825
5826         return smb2_rename(work, fp, rename_info, work->conn->local_nls);
5827 }
5828
5829 static int set_file_disposition_info(struct ksmbd_file *fp,
5830                                      struct smb2_file_disposition_info *file_info)
5831 {
5832         struct inode *inode;
5833
5834         if (!(fp->daccess & FILE_DELETE_LE)) {
5835                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5836                 return -EACCES;
5837         }
5838
5839         inode = file_inode(fp->filp);
5840         if (file_info->DeletePending) {
5841                 if (S_ISDIR(inode->i_mode) &&
5842                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5843                         return -EBUSY;
5844                 ksmbd_set_inode_pending_delete(fp);
5845         } else {
5846                 ksmbd_clear_inode_pending_delete(fp);
5847         }
5848         return 0;
5849 }
5850
5851 static int set_file_position_info(struct ksmbd_file *fp,
5852                                   struct smb2_file_pos_info *file_info)
5853 {
5854         loff_t current_byte_offset;
5855         unsigned long sector_size;
5856         struct inode *inode;
5857
5858         inode = file_inode(fp->filp);
5859         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5860         sector_size = inode->i_sb->s_blocksize;
5861
5862         if (current_byte_offset < 0 ||
5863             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5864              current_byte_offset & (sector_size - 1))) {
5865                 pr_err("CurrentByteOffset is not valid : %llu\n",
5866                        current_byte_offset);
5867                 return -EINVAL;
5868         }
5869
5870         fp->filp->f_pos = current_byte_offset;
5871         return 0;
5872 }
5873
5874 static int set_file_mode_info(struct ksmbd_file *fp,
5875                               struct smb2_file_mode_info *file_info)
5876 {
5877         __le32 mode;
5878
5879         mode = file_info->Mode;
5880
5881         if ((mode & ~FILE_MODE_INFO_MASK)) {
5882                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5883                 return -EINVAL;
5884         }
5885
5886         /*
5887          * TODO : need to implement consideration for
5888          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5889          */
5890         ksmbd_vfs_set_fadvise(fp->filp, mode);
5891         fp->coption = mode;
5892         return 0;
5893 }
5894
5895 /**
5896  * smb2_set_info_file() - handler for smb2 set info command
5897  * @work:       smb work containing set info command buffer
5898  * @fp:         ksmbd_file pointer
5899  * @req:        request buffer pointer
5900  * @share:      ksmbd_share_config pointer
5901  *
5902  * Return:      0 on success, otherwise error
5903  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5904  */
5905 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5906                               struct smb2_set_info_req *req,
5907                               struct ksmbd_share_config *share)
5908 {
5909         unsigned int buf_len = le32_to_cpu(req->BufferLength);
5910
5911         switch (req->FileInfoClass) {
5912         case FILE_BASIC_INFORMATION:
5913         {
5914                 if (buf_len < sizeof(struct smb2_file_basic_info))
5915                         return -EINVAL;
5916
5917                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5918         }
5919         case FILE_ALLOCATION_INFORMATION:
5920         {
5921                 if (buf_len < sizeof(struct smb2_file_alloc_info))
5922                         return -EINVAL;
5923
5924                 return set_file_allocation_info(work, fp,
5925                                                 (struct smb2_file_alloc_info *)req->Buffer);
5926         }
5927         case FILE_END_OF_FILE_INFORMATION:
5928         {
5929                 if (buf_len < sizeof(struct smb2_file_eof_info))
5930                         return -EINVAL;
5931
5932                 return set_end_of_file_info(work, fp,
5933                                             (struct smb2_file_eof_info *)req->Buffer);
5934         }
5935         case FILE_RENAME_INFORMATION:
5936         {
5937                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5938                         ksmbd_debug(SMB,
5939                                     "User does not have write permission\n");
5940                         return -EACCES;
5941                 }
5942
5943                 if (buf_len < sizeof(struct smb2_file_rename_info))
5944                         return -EINVAL;
5945
5946                 return set_rename_info(work, fp,
5947                                        (struct smb2_file_rename_info *)req->Buffer,
5948                                        buf_len);
5949         }
5950         case FILE_LINK_INFORMATION:
5951         {
5952                 if (buf_len < sizeof(struct smb2_file_link_info))
5953                         return -EINVAL;
5954
5955                 return smb2_create_link(work, work->tcon->share_conf,
5956                                         (struct smb2_file_link_info *)req->Buffer,
5957                                         buf_len, fp->filp,
5958                                         work->conn->local_nls);
5959         }
5960         case FILE_DISPOSITION_INFORMATION:
5961         {
5962                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5963                         ksmbd_debug(SMB,
5964                                     "User does not have write permission\n");
5965                         return -EACCES;
5966                 }
5967
5968                 if (buf_len < sizeof(struct smb2_file_disposition_info))
5969                         return -EINVAL;
5970
5971                 return set_file_disposition_info(fp,
5972                                                  (struct smb2_file_disposition_info *)req->Buffer);
5973         }
5974         case FILE_FULL_EA_INFORMATION:
5975         {
5976                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5977                         pr_err("Not permitted to write ext  attr: 0x%x\n",
5978                                fp->daccess);
5979                         return -EACCES;
5980                 }
5981
5982                 if (buf_len < sizeof(struct smb2_ea_info))
5983                         return -EINVAL;
5984
5985                 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5986                                    buf_len, &fp->filp->f_path);
5987         }
5988         case FILE_POSITION_INFORMATION:
5989         {
5990                 if (buf_len < sizeof(struct smb2_file_pos_info))
5991                         return -EINVAL;
5992
5993                 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
5994         }
5995         case FILE_MODE_INFORMATION:
5996         {
5997                 if (buf_len < sizeof(struct smb2_file_mode_info))
5998                         return -EINVAL;
5999
6000                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
6001         }
6002         }
6003
6004         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6005         return -EOPNOTSUPP;
6006 }
6007
6008 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6009                              char *buffer, int buf_len)
6010 {
6011         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6012
6013         fp->saccess |= FILE_SHARE_DELETE_LE;
6014
6015         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6016                         buf_len, false);
6017 }
6018
6019 /**
6020  * smb2_set_info() - handler for smb2 set info command handler
6021  * @work:       smb work containing set info request buffer
6022  *
6023  * Return:      0 on success, otherwise error
6024  */
6025 int smb2_set_info(struct ksmbd_work *work)
6026 {
6027         struct smb2_set_info_req *req;
6028         struct smb2_set_info_rsp *rsp;
6029         struct ksmbd_file *fp;
6030         int rc = 0;
6031         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6032
6033         ksmbd_debug(SMB, "Received set info request\n");
6034
6035         if (work->next_smb2_rcv_hdr_off) {
6036                 req = ksmbd_req_buf_next(work);
6037                 rsp = ksmbd_resp_buf_next(work);
6038                 if (!has_file_id(req->VolatileFileId)) {
6039                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6040                                     work->compound_fid);
6041                         id = work->compound_fid;
6042                         pid = work->compound_pfid;
6043                 }
6044         } else {
6045                 req = smb2_get_msg(work->request_buf);
6046                 rsp = smb2_get_msg(work->response_buf);
6047         }
6048
6049         if (!has_file_id(id)) {
6050                 id = req->VolatileFileId;
6051                 pid = req->PersistentFileId;
6052         }
6053
6054         fp = ksmbd_lookup_fd_slow(work, id, pid);
6055         if (!fp) {
6056                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6057                 rc = -ENOENT;
6058                 goto err_out;
6059         }
6060
6061         switch (req->InfoType) {
6062         case SMB2_O_INFO_FILE:
6063                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6064                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6065                 break;
6066         case SMB2_O_INFO_SECURITY:
6067                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6068                 if (ksmbd_override_fsids(work)) {
6069                         rc = -ENOMEM;
6070                         goto err_out;
6071                 }
6072                 rc = smb2_set_info_sec(fp,
6073                                        le32_to_cpu(req->AdditionalInformation),
6074                                        req->Buffer,
6075                                        le32_to_cpu(req->BufferLength));
6076                 ksmbd_revert_fsids(work);
6077                 break;
6078         default:
6079                 rc = -EOPNOTSUPP;
6080         }
6081
6082         if (rc < 0)
6083                 goto err_out;
6084
6085         rsp->StructureSize = cpu_to_le16(2);
6086         rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6087                                sizeof(struct smb2_set_info_rsp));
6088         if (rc)
6089                 goto err_out;
6090         ksmbd_fd_put(work, fp);
6091         return 0;
6092
6093 err_out:
6094         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6095                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6096         else if (rc == -EINVAL)
6097                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6098         else if (rc == -ESHARE)
6099                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6100         else if (rc == -ENOENT)
6101                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6102         else if (rc == -EBUSY || rc == -ENOTEMPTY)
6103                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6104         else if (rc == -EAGAIN)
6105                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6106         else if (rc == -EBADF || rc == -ESTALE)
6107                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6108         else if (rc == -EEXIST)
6109                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6110         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6111                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6112         smb2_set_err_rsp(work);
6113         ksmbd_fd_put(work, fp);
6114         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6115         return rc;
6116 }
6117
6118 /**
6119  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6120  * @work:       smb work containing read IPC pipe command buffer
6121  *
6122  * Return:      0 on success, otherwise error
6123  */
6124 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6125 {
6126         int nbytes = 0, err;
6127         u64 id;
6128         struct ksmbd_rpc_command *rpc_resp;
6129         struct smb2_read_req *req;
6130         struct smb2_read_rsp *rsp;
6131
6132         WORK_BUFFERS(work, req, rsp);
6133
6134         id = req->VolatileFileId;
6135
6136         rpc_resp = ksmbd_rpc_read(work->sess, id);
6137         if (rpc_resp) {
6138                 void *aux_payload_buf;
6139
6140                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6141                         err = -EINVAL;
6142                         goto out;
6143                 }
6144
6145                 aux_payload_buf =
6146                         kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6147                 if (!aux_payload_buf) {
6148                         err = -ENOMEM;
6149                         goto out;
6150                 }
6151
6152                 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6153
6154                 nbytes = rpc_resp->payload_sz;
6155                 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6156                                              offsetof(struct smb2_read_rsp, Buffer),
6157                                              aux_payload_buf, nbytes);
6158                 if (err)
6159                         goto out;
6160                 kvfree(rpc_resp);
6161         } else {
6162                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6163                                         offsetof(struct smb2_read_rsp, Buffer));
6164                 if (err)
6165                         goto out;
6166         }
6167
6168         rsp->StructureSize = cpu_to_le16(17);
6169         rsp->DataOffset = 80;
6170         rsp->Reserved = 0;
6171         rsp->DataLength = cpu_to_le32(nbytes);
6172         rsp->DataRemaining = 0;
6173         rsp->Flags = 0;
6174         return 0;
6175
6176 out:
6177         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6178         smb2_set_err_rsp(work);
6179         kvfree(rpc_resp);
6180         return err;
6181 }
6182
6183 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6184                                         struct smb2_buffer_desc_v1 *desc,
6185                                         __le32 Channel,
6186                                         __le16 ChannelInfoLength)
6187 {
6188         unsigned int i, ch_count;
6189
6190         if (work->conn->dialect == SMB30_PROT_ID &&
6191             Channel != SMB2_CHANNEL_RDMA_V1)
6192                 return -EINVAL;
6193
6194         ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6195         if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6196                 for (i = 0; i < ch_count; i++) {
6197                         pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6198                                 i,
6199                                 le32_to_cpu(desc[i].token),
6200                                 le32_to_cpu(desc[i].length));
6201                 }
6202         }
6203         if (!ch_count)
6204                 return -EINVAL;
6205
6206         work->need_invalidate_rkey =
6207                 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6208         if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6209                 work->remote_key = le32_to_cpu(desc->token);
6210         return 0;
6211 }
6212
6213 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6214                                       struct smb2_read_req *req, void *data_buf,
6215                                       size_t length)
6216 {
6217         int err;
6218
6219         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6220                                     (struct smb2_buffer_desc_v1 *)
6221                                     ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6222                                     le16_to_cpu(req->ReadChannelInfoLength));
6223         if (err)
6224                 return err;
6225
6226         return length;
6227 }
6228
6229 /**
6230  * smb2_read() - handler for smb2 read from file
6231  * @work:       smb work containing read command buffer
6232  *
6233  * Return:      0 on success, otherwise error
6234  */
6235 int smb2_read(struct ksmbd_work *work)
6236 {
6237         struct ksmbd_conn *conn = work->conn;
6238         struct smb2_read_req *req;
6239         struct smb2_read_rsp *rsp;
6240         struct ksmbd_file *fp = NULL;
6241         loff_t offset;
6242         size_t length, mincount;
6243         ssize_t nbytes = 0, remain_bytes = 0;
6244         int err = 0;
6245         bool is_rdma_channel = false;
6246         unsigned int max_read_size = conn->vals->max_read_size;
6247         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6248         void *aux_payload_buf;
6249
6250         if (test_share_config_flag(work->tcon->share_conf,
6251                                    KSMBD_SHARE_FLAG_PIPE)) {
6252                 ksmbd_debug(SMB, "IPC pipe read request\n");
6253                 return smb2_read_pipe(work);
6254         }
6255
6256         if (work->next_smb2_rcv_hdr_off) {
6257                 req = ksmbd_req_buf_next(work);
6258                 rsp = ksmbd_resp_buf_next(work);
6259                 if (!has_file_id(req->VolatileFileId)) {
6260                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6261                                         work->compound_fid);
6262                         id = work->compound_fid;
6263                         pid = work->compound_pfid;
6264                 }
6265         } else {
6266                 req = smb2_get_msg(work->request_buf);
6267                 rsp = smb2_get_msg(work->response_buf);
6268         }
6269
6270         if (!has_file_id(id)) {
6271                 id = req->VolatileFileId;
6272                 pid = req->PersistentFileId;
6273         }
6274
6275         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6276             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6277                 is_rdma_channel = true;
6278                 max_read_size = get_smbd_max_read_write_size();
6279         }
6280
6281         if (is_rdma_channel == true) {
6282                 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6283
6284                 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6285                         err = -EINVAL;
6286                         goto out;
6287                 }
6288                 err = smb2_set_remote_key_for_rdma(work,
6289                                                    (struct smb2_buffer_desc_v1 *)
6290                                                    ((char *)req + ch_offset),
6291                                                    req->Channel,
6292                                                    req->ReadChannelInfoLength);
6293                 if (err)
6294                         goto out;
6295         }
6296
6297         fp = ksmbd_lookup_fd_slow(work, id, pid);
6298         if (!fp) {
6299                 err = -ENOENT;
6300                 goto out;
6301         }
6302
6303         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6304                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6305                 err = -EACCES;
6306                 goto out;
6307         }
6308
6309         offset = le64_to_cpu(req->Offset);
6310         length = le32_to_cpu(req->Length);
6311         mincount = le32_to_cpu(req->MinimumCount);
6312
6313         if (length > max_read_size) {
6314                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6315                             max_read_size);
6316                 err = -EINVAL;
6317                 goto out;
6318         }
6319
6320         ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6321                     fp->filp, offset, length);
6322
6323         aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6324         if (!aux_payload_buf) {
6325                 err = -ENOMEM;
6326                 goto out;
6327         }
6328
6329         nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6330         if (nbytes < 0) {
6331                 err = nbytes;
6332                 goto out;
6333         }
6334
6335         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6336                 kvfree(aux_payload_buf);
6337                 rsp->hdr.Status = STATUS_END_OF_FILE;
6338                 smb2_set_err_rsp(work);
6339                 ksmbd_fd_put(work, fp);
6340                 return 0;
6341         }
6342
6343         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6344                     nbytes, offset, mincount);
6345
6346         if (is_rdma_channel == true) {
6347                 /* write data to the client using rdma channel */
6348                 remain_bytes = smb2_read_rdma_channel(work, req,
6349                                                       aux_payload_buf,
6350                                                       nbytes);
6351                 kvfree(aux_payload_buf);
6352                 aux_payload_buf = NULL;
6353                 nbytes = 0;
6354                 if (remain_bytes < 0) {
6355                         err = (int)remain_bytes;
6356                         goto out;
6357                 }
6358         }
6359
6360         rsp->StructureSize = cpu_to_le16(17);
6361         rsp->DataOffset = 80;
6362         rsp->Reserved = 0;
6363         rsp->DataLength = cpu_to_le32(nbytes);
6364         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6365         rsp->Flags = 0;
6366         err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6367                                      offsetof(struct smb2_read_rsp, Buffer),
6368                                      aux_payload_buf, nbytes);
6369         if (err)
6370                 goto out;
6371         ksmbd_fd_put(work, fp);
6372         return 0;
6373
6374 out:
6375         if (err) {
6376                 if (err == -EISDIR)
6377                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6378                 else if (err == -EAGAIN)
6379                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6380                 else if (err == -ENOENT)
6381                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6382                 else if (err == -EACCES)
6383                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6384                 else if (err == -ESHARE)
6385                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6386                 else if (err == -EINVAL)
6387                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6388                 else
6389                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6390
6391                 smb2_set_err_rsp(work);
6392         }
6393         ksmbd_fd_put(work, fp);
6394         return err;
6395 }
6396
6397 /**
6398  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6399  * @work:       smb work containing write IPC pipe command buffer
6400  *
6401  * Return:      0 on success, otherwise error
6402  */
6403 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6404 {
6405         struct smb2_write_req *req;
6406         struct smb2_write_rsp *rsp;
6407         struct ksmbd_rpc_command *rpc_resp;
6408         u64 id = 0;
6409         int err = 0, ret = 0;
6410         char *data_buf;
6411         size_t length;
6412
6413         WORK_BUFFERS(work, req, rsp);
6414
6415         length = le32_to_cpu(req->Length);
6416         id = req->VolatileFileId;
6417
6418         if ((u64)le16_to_cpu(req->DataOffset) + length >
6419             get_rfc1002_len(work->request_buf)) {
6420                 pr_err("invalid write data offset %u, smb_len %u\n",
6421                        le16_to_cpu(req->DataOffset),
6422                        get_rfc1002_len(work->request_buf));
6423                 err = -EINVAL;
6424                 goto out;
6425         }
6426
6427         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6428                            le16_to_cpu(req->DataOffset));
6429
6430         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6431         if (rpc_resp) {
6432                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6433                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6434                         kvfree(rpc_resp);
6435                         smb2_set_err_rsp(work);
6436                         return -EOPNOTSUPP;
6437                 }
6438                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6439                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6440                         smb2_set_err_rsp(work);
6441                         kvfree(rpc_resp);
6442                         return ret;
6443                 }
6444                 kvfree(rpc_resp);
6445         }
6446
6447         rsp->StructureSize = cpu_to_le16(17);
6448         rsp->DataOffset = 0;
6449         rsp->Reserved = 0;
6450         rsp->DataLength = cpu_to_le32(length);
6451         rsp->DataRemaining = 0;
6452         rsp->Reserved2 = 0;
6453         err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6454                                 offsetof(struct smb2_write_rsp, Buffer));
6455 out:
6456         if (err) {
6457                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6458                 smb2_set_err_rsp(work);
6459         }
6460
6461         return err;
6462 }
6463
6464 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6465                                        struct smb2_write_req *req,
6466                                        struct ksmbd_file *fp,
6467                                        loff_t offset, size_t length, bool sync)
6468 {
6469         char *data_buf;
6470         int ret;
6471         ssize_t nbytes;
6472
6473         data_buf = kvzalloc(length, GFP_KERNEL);
6474         if (!data_buf)
6475                 return -ENOMEM;
6476
6477         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6478                                    (struct smb2_buffer_desc_v1 *)
6479                                    ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6480                                    le16_to_cpu(req->WriteChannelInfoLength));
6481         if (ret < 0) {
6482                 kvfree(data_buf);
6483                 return ret;
6484         }
6485
6486         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6487         kvfree(data_buf);
6488         if (ret < 0)
6489                 return ret;
6490
6491         return nbytes;
6492 }
6493
6494 /**
6495  * smb2_write() - handler for smb2 write from file
6496  * @work:       smb work containing write command buffer
6497  *
6498  * Return:      0 on success, otherwise error
6499  */
6500 int smb2_write(struct ksmbd_work *work)
6501 {
6502         struct smb2_write_req *req;
6503         struct smb2_write_rsp *rsp;
6504         struct ksmbd_file *fp = NULL;
6505         loff_t offset;
6506         size_t length;
6507         ssize_t nbytes;
6508         char *data_buf;
6509         bool writethrough = false, is_rdma_channel = false;
6510         int err = 0;
6511         unsigned int max_write_size = work->conn->vals->max_write_size;
6512
6513         WORK_BUFFERS(work, req, rsp);
6514
6515         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6516                 ksmbd_debug(SMB, "IPC pipe write request\n");
6517                 return smb2_write_pipe(work);
6518         }
6519
6520         offset = le64_to_cpu(req->Offset);
6521         length = le32_to_cpu(req->Length);
6522
6523         if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6524             req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6525                 is_rdma_channel = true;
6526                 max_write_size = get_smbd_max_read_write_size();
6527                 length = le32_to_cpu(req->RemainingBytes);
6528         }
6529
6530         if (is_rdma_channel == true) {
6531                 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6532
6533                 if (req->Length != 0 || req->DataOffset != 0 ||
6534                     ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6535                         err = -EINVAL;
6536                         goto out;
6537                 }
6538                 err = smb2_set_remote_key_for_rdma(work,
6539                                                    (struct smb2_buffer_desc_v1 *)
6540                                                    ((char *)req + ch_offset),
6541                                                    req->Channel,
6542                                                    req->WriteChannelInfoLength);
6543                 if (err)
6544                         goto out;
6545         }
6546
6547         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6548                 ksmbd_debug(SMB, "User does not have write permission\n");
6549                 err = -EACCES;
6550                 goto out;
6551         }
6552
6553         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6554         if (!fp) {
6555                 err = -ENOENT;
6556                 goto out;
6557         }
6558
6559         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6560                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6561                 err = -EACCES;
6562                 goto out;
6563         }
6564
6565         if (length > max_write_size) {
6566                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6567                             max_write_size);
6568                 err = -EINVAL;
6569                 goto out;
6570         }
6571
6572         ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6573         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6574                 writethrough = true;
6575
6576         if (is_rdma_channel == false) {
6577                 if (le16_to_cpu(req->DataOffset) <
6578                     offsetof(struct smb2_write_req, Buffer)) {
6579                         err = -EINVAL;
6580                         goto out;
6581                 }
6582
6583                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6584                                     le16_to_cpu(req->DataOffset));
6585
6586                 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6587                             fp->filp, offset, length);
6588                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6589                                       writethrough, &nbytes);
6590                 if (err < 0)
6591                         goto out;
6592         } else {
6593                 /* read data from the client using rdma channel, and
6594                  * write the data.
6595                  */
6596                 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6597                                                  writethrough);
6598                 if (nbytes < 0) {
6599                         err = (int)nbytes;
6600                         goto out;
6601                 }
6602         }
6603
6604         rsp->StructureSize = cpu_to_le16(17);
6605         rsp->DataOffset = 0;
6606         rsp->Reserved = 0;
6607         rsp->DataLength = cpu_to_le32(nbytes);
6608         rsp->DataRemaining = 0;
6609         rsp->Reserved2 = 0;
6610         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6611         if (err)
6612                 goto out;
6613         ksmbd_fd_put(work, fp);
6614         return 0;
6615
6616 out:
6617         if (err == -EAGAIN)
6618                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6619         else if (err == -ENOSPC || err == -EFBIG)
6620                 rsp->hdr.Status = STATUS_DISK_FULL;
6621         else if (err == -ENOENT)
6622                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6623         else if (err == -EACCES)
6624                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6625         else if (err == -ESHARE)
6626                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6627         else if (err == -EINVAL)
6628                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6629         else
6630                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6631
6632         smb2_set_err_rsp(work);
6633         ksmbd_fd_put(work, fp);
6634         return err;
6635 }
6636
6637 /**
6638  * smb2_flush() - handler for smb2 flush file - fsync
6639  * @work:       smb work containing flush command buffer
6640  *
6641  * Return:      0 on success, otherwise error
6642  */
6643 int smb2_flush(struct ksmbd_work *work)
6644 {
6645         struct smb2_flush_req *req;
6646         struct smb2_flush_rsp *rsp;
6647         int err;
6648
6649         WORK_BUFFERS(work, req, rsp);
6650
6651         ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6652
6653         err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6654         if (err)
6655                 goto out;
6656
6657         rsp->StructureSize = cpu_to_le16(4);
6658         rsp->Reserved = 0;
6659         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
6660
6661 out:
6662         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6663         smb2_set_err_rsp(work);
6664         return err;
6665 }
6666
6667 /**
6668  * smb2_cancel() - handler for smb2 cancel command
6669  * @work:       smb work containing cancel command buffer
6670  *
6671  * Return:      0 on success, otherwise error
6672  */
6673 int smb2_cancel(struct ksmbd_work *work)
6674 {
6675         struct ksmbd_conn *conn = work->conn;
6676         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6677         struct smb2_hdr *chdr;
6678         struct ksmbd_work *iter;
6679         struct list_head *command_list;
6680
6681         if (work->next_smb2_rcv_hdr_off)
6682                 hdr = ksmbd_resp_buf_next(work);
6683
6684         ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6685                     hdr->MessageId, hdr->Flags);
6686
6687         if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6688                 command_list = &conn->async_requests;
6689
6690                 spin_lock(&conn->request_lock);
6691                 list_for_each_entry(iter, command_list,
6692                                     async_request_entry) {
6693                         chdr = smb2_get_msg(iter->request_buf);
6694
6695                         if (iter->async_id !=
6696                             le64_to_cpu(hdr->Id.AsyncId))
6697                                 continue;
6698
6699                         ksmbd_debug(SMB,
6700                                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6701                                     le64_to_cpu(hdr->Id.AsyncId),
6702                                     le16_to_cpu(chdr->Command));
6703                         iter->state = KSMBD_WORK_CANCELLED;
6704                         if (iter->cancel_fn)
6705                                 iter->cancel_fn(iter->cancel_argv);
6706                         break;
6707                 }
6708                 spin_unlock(&conn->request_lock);
6709         } else {
6710                 command_list = &conn->requests;
6711
6712                 spin_lock(&conn->request_lock);
6713                 list_for_each_entry(iter, command_list, request_entry) {
6714                         chdr = smb2_get_msg(iter->request_buf);
6715
6716                         if (chdr->MessageId != hdr->MessageId ||
6717                             iter == work)
6718                                 continue;
6719
6720                         ksmbd_debug(SMB,
6721                                     "smb2 with mid %llu cancelled command = 0x%x\n",
6722                                     le64_to_cpu(hdr->MessageId),
6723                                     le16_to_cpu(chdr->Command));
6724                         iter->state = KSMBD_WORK_CANCELLED;
6725                         break;
6726                 }
6727                 spin_unlock(&conn->request_lock);
6728         }
6729
6730         /* For SMB2_CANCEL command itself send no response*/
6731         work->send_no_response = 1;
6732         return 0;
6733 }
6734
6735 struct file_lock *smb_flock_init(struct file *f)
6736 {
6737         struct file_lock *fl;
6738
6739         fl = locks_alloc_lock();
6740         if (!fl)
6741                 goto out;
6742
6743         locks_init_lock(fl);
6744
6745         fl->fl_owner = f;
6746         fl->fl_pid = current->tgid;
6747         fl->fl_file = f;
6748         fl->fl_flags = FL_POSIX;
6749         fl->fl_ops = NULL;
6750         fl->fl_lmops = NULL;
6751
6752 out:
6753         return fl;
6754 }
6755
6756 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6757 {
6758         int cmd = -EINVAL;
6759
6760         /* Checking for wrong flag combination during lock request*/
6761         switch (flags) {
6762         case SMB2_LOCKFLAG_SHARED:
6763                 ksmbd_debug(SMB, "received shared request\n");
6764                 cmd = F_SETLKW;
6765                 flock->fl_type = F_RDLCK;
6766                 flock->fl_flags |= FL_SLEEP;
6767                 break;
6768         case SMB2_LOCKFLAG_EXCLUSIVE:
6769                 ksmbd_debug(SMB, "received exclusive request\n");
6770                 cmd = F_SETLKW;
6771                 flock->fl_type = F_WRLCK;
6772                 flock->fl_flags |= FL_SLEEP;
6773                 break;
6774         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6775                 ksmbd_debug(SMB,
6776                             "received shared & fail immediately request\n");
6777                 cmd = F_SETLK;
6778                 flock->fl_type = F_RDLCK;
6779                 break;
6780         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6781                 ksmbd_debug(SMB,
6782                             "received exclusive & fail immediately request\n");
6783                 cmd = F_SETLK;
6784                 flock->fl_type = F_WRLCK;
6785                 break;
6786         case SMB2_LOCKFLAG_UNLOCK:
6787                 ksmbd_debug(SMB, "received unlock request\n");
6788                 flock->fl_type = F_UNLCK;
6789                 cmd = F_SETLK;
6790                 break;
6791         }
6792
6793         return cmd;
6794 }
6795
6796 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6797                                          unsigned int cmd, int flags,
6798                                          struct list_head *lock_list)
6799 {
6800         struct ksmbd_lock *lock;
6801
6802         lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6803         if (!lock)
6804                 return NULL;
6805
6806         lock->cmd = cmd;
6807         lock->fl = flock;
6808         lock->start = flock->fl_start;
6809         lock->end = flock->fl_end;
6810         lock->flags = flags;
6811         if (lock->start == lock->end)
6812                 lock->zero_len = 1;
6813         INIT_LIST_HEAD(&lock->clist);
6814         INIT_LIST_HEAD(&lock->flist);
6815         INIT_LIST_HEAD(&lock->llist);
6816         list_add_tail(&lock->llist, lock_list);
6817
6818         return lock;
6819 }
6820
6821 static void smb2_remove_blocked_lock(void **argv)
6822 {
6823         struct file_lock *flock = (struct file_lock *)argv[0];
6824
6825         ksmbd_vfs_posix_lock_unblock(flock);
6826         wake_up(&flock->fl_wait);
6827 }
6828
6829 static inline bool lock_defer_pending(struct file_lock *fl)
6830 {
6831         /* check pending lock waiters */
6832         return waitqueue_active(&fl->fl_wait);
6833 }
6834
6835 /**
6836  * smb2_lock() - handler for smb2 file lock command
6837  * @work:       smb work containing lock command buffer
6838  *
6839  * Return:      0 on success, otherwise error
6840  */
6841 int smb2_lock(struct ksmbd_work *work)
6842 {
6843         struct smb2_lock_req *req;
6844         struct smb2_lock_rsp *rsp;
6845         struct smb2_lock_element *lock_ele;
6846         struct ksmbd_file *fp = NULL;
6847         struct file_lock *flock = NULL;
6848         struct file *filp = NULL;
6849         int lock_count;
6850         int flags = 0;
6851         int cmd = 0;
6852         int err = -EIO, i, rc = 0;
6853         u64 lock_start, lock_length;
6854         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6855         struct ksmbd_conn *conn;
6856         int nolock = 0;
6857         LIST_HEAD(lock_list);
6858         LIST_HEAD(rollback_list);
6859         int prior_lock = 0;
6860
6861         WORK_BUFFERS(work, req, rsp);
6862
6863         ksmbd_debug(SMB, "Received lock request\n");
6864         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6865         if (!fp) {
6866                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
6867                 err = -ENOENT;
6868                 goto out2;
6869         }
6870
6871         filp = fp->filp;
6872         lock_count = le16_to_cpu(req->LockCount);
6873         lock_ele = req->locks;
6874
6875         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6876         if (!lock_count) {
6877                 err = -EINVAL;
6878                 goto out2;
6879         }
6880
6881         for (i = 0; i < lock_count; i++) {
6882                 flags = le32_to_cpu(lock_ele[i].Flags);
6883
6884                 flock = smb_flock_init(filp);
6885                 if (!flock)
6886                         goto out;
6887
6888                 cmd = smb2_set_flock_flags(flock, flags);
6889
6890                 lock_start = le64_to_cpu(lock_ele[i].Offset);
6891                 lock_length = le64_to_cpu(lock_ele[i].Length);
6892                 if (lock_start > U64_MAX - lock_length) {
6893                         pr_err("Invalid lock range requested\n");
6894                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6895                         locks_free_lock(flock);
6896                         goto out;
6897                 }
6898
6899                 if (lock_start > OFFSET_MAX)
6900                         flock->fl_start = OFFSET_MAX;
6901                 else
6902                         flock->fl_start = lock_start;
6903
6904                 lock_length = le64_to_cpu(lock_ele[i].Length);
6905                 if (lock_length > OFFSET_MAX - flock->fl_start)
6906                         lock_length = OFFSET_MAX - flock->fl_start;
6907
6908                 flock->fl_end = flock->fl_start + lock_length;
6909
6910                 if (flock->fl_end < flock->fl_start) {
6911                         ksmbd_debug(SMB,
6912                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
6913                                     flock->fl_end, flock->fl_start);
6914                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6915                         locks_free_lock(flock);
6916                         goto out;
6917                 }
6918
6919                 /* Check conflict locks in one request */
6920                 list_for_each_entry(cmp_lock, &lock_list, llist) {
6921                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
6922                             cmp_lock->fl->fl_end >= flock->fl_end) {
6923                                 if (cmp_lock->fl->fl_type != F_UNLCK &&
6924                                     flock->fl_type != F_UNLCK) {
6925                                         pr_err("conflict two locks in one request\n");
6926                                         err = -EINVAL;
6927                                         locks_free_lock(flock);
6928                                         goto out;
6929                                 }
6930                         }
6931                 }
6932
6933                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6934                 if (!smb_lock) {
6935                         err = -EINVAL;
6936                         locks_free_lock(flock);
6937                         goto out;
6938                 }
6939         }
6940
6941         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6942                 if (smb_lock->cmd < 0) {
6943                         err = -EINVAL;
6944                         goto out;
6945                 }
6946
6947                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6948                         err = -EINVAL;
6949                         goto out;
6950                 }
6951
6952                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6953                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6954                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6955                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6956                         err = -EINVAL;
6957                         goto out;
6958                 }
6959
6960                 prior_lock = smb_lock->flags;
6961
6962                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6963                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6964                         goto no_check_cl;
6965
6966                 nolock = 1;
6967                 /* check locks in connection list */
6968                 down_read(&conn_list_lock);
6969                 list_for_each_entry(conn, &conn_list, conns_list) {
6970                         spin_lock(&conn->llist_lock);
6971                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6972                                 if (file_inode(cmp_lock->fl->fl_file) !=
6973                                     file_inode(smb_lock->fl->fl_file))
6974                                         continue;
6975
6976                                 if (smb_lock->fl->fl_type == F_UNLCK) {
6977                                         if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6978                                             cmp_lock->start == smb_lock->start &&
6979                                             cmp_lock->end == smb_lock->end &&
6980                                             !lock_defer_pending(cmp_lock->fl)) {
6981                                                 nolock = 0;
6982                                                 list_del(&cmp_lock->flist);
6983                                                 list_del(&cmp_lock->clist);
6984                                                 spin_unlock(&conn->llist_lock);
6985                                                 up_read(&conn_list_lock);
6986
6987                                                 locks_free_lock(cmp_lock->fl);
6988                                                 kfree(cmp_lock);
6989                                                 goto out_check_cl;
6990                                         }
6991                                         continue;
6992                                 }
6993
6994                                 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
6995                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
6996                                                 continue;
6997                                 } else {
6998                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
6999                                                 continue;
7000                                 }
7001
7002                                 /* check zero byte lock range */
7003                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7004                                     cmp_lock->start > smb_lock->start &&
7005                                     cmp_lock->start < smb_lock->end) {
7006                                         spin_unlock(&conn->llist_lock);
7007                                         up_read(&conn_list_lock);
7008                                         pr_err("previous lock conflict with zero byte lock range\n");
7009                                         goto out;
7010                                 }
7011
7012                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7013                                     smb_lock->start > cmp_lock->start &&
7014                                     smb_lock->start < cmp_lock->end) {
7015                                         spin_unlock(&conn->llist_lock);
7016                                         up_read(&conn_list_lock);
7017                                         pr_err("current lock conflict with zero byte lock range\n");
7018                                         goto out;
7019                                 }
7020
7021                                 if (((cmp_lock->start <= smb_lock->start &&
7022                                       cmp_lock->end > smb_lock->start) ||
7023                                      (cmp_lock->start < smb_lock->end &&
7024                                       cmp_lock->end >= smb_lock->end)) &&
7025                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
7026                                         spin_unlock(&conn->llist_lock);
7027                                         up_read(&conn_list_lock);
7028                                         pr_err("Not allow lock operation on exclusive lock range\n");
7029                                         goto out;
7030                                 }
7031                         }
7032                         spin_unlock(&conn->llist_lock);
7033                 }
7034                 up_read(&conn_list_lock);
7035 out_check_cl:
7036                 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
7037                         pr_err("Try to unlock nolocked range\n");
7038                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7039                         goto out;
7040                 }
7041
7042 no_check_cl:
7043                 if (smb_lock->zero_len) {
7044                         err = 0;
7045                         goto skip;
7046                 }
7047
7048                 flock = smb_lock->fl;
7049                 list_del(&smb_lock->llist);
7050 retry:
7051                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7052 skip:
7053                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7054                         if (!rc) {
7055                                 ksmbd_debug(SMB, "File unlocked\n");
7056                         } else if (rc == -ENOENT) {
7057                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
7058                                 goto out;
7059                         }
7060                         locks_free_lock(flock);
7061                         kfree(smb_lock);
7062                 } else {
7063                         if (rc == FILE_LOCK_DEFERRED) {
7064                                 void **argv;
7065
7066                                 ksmbd_debug(SMB,
7067                                             "would have to wait for getting lock\n");
7068                                 list_add(&smb_lock->llist, &rollback_list);
7069
7070                                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7071                                 if (!argv) {
7072                                         err = -ENOMEM;
7073                                         goto out;
7074                                 }
7075                                 argv[0] = flock;
7076
7077                                 rc = setup_async_work(work,
7078                                                       smb2_remove_blocked_lock,
7079                                                       argv);
7080                                 if (rc) {
7081                                         err = -ENOMEM;
7082                                         goto out;
7083                                 }
7084                                 spin_lock(&fp->f_lock);
7085                                 list_add(&work->fp_entry, &fp->blocked_works);
7086                                 spin_unlock(&fp->f_lock);
7087
7088                                 smb2_send_interim_resp(work, STATUS_PENDING);
7089
7090                                 ksmbd_vfs_posix_lock_wait(flock);
7091
7092                                 spin_lock(&fp->f_lock);
7093                                 list_del(&work->fp_entry);
7094                                 spin_unlock(&fp->f_lock);
7095
7096                                 if (work->state != KSMBD_WORK_ACTIVE) {
7097                                         list_del(&smb_lock->llist);
7098                                         locks_free_lock(flock);
7099
7100                                         if (work->state == KSMBD_WORK_CANCELLED) {
7101                                                 rsp->hdr.Status =
7102                                                         STATUS_CANCELLED;
7103                                                 kfree(smb_lock);
7104                                                 smb2_send_interim_resp(work,
7105                                                                        STATUS_CANCELLED);
7106                                                 work->send_no_response = 1;
7107                                                 goto out;
7108                                         }
7109
7110                                         rsp->hdr.Status =
7111                                                 STATUS_RANGE_NOT_LOCKED;
7112                                         kfree(smb_lock);
7113                                         goto out2;
7114                                 }
7115
7116                                 list_del(&smb_lock->llist);
7117                                 release_async_work(work);
7118                                 goto retry;
7119                         } else if (!rc) {
7120                                 list_add(&smb_lock->llist, &rollback_list);
7121                                 spin_lock(&work->conn->llist_lock);
7122                                 list_add_tail(&smb_lock->clist,
7123                                               &work->conn->lock_list);
7124                                 list_add_tail(&smb_lock->flist,
7125                                               &fp->lock_list);
7126                                 spin_unlock(&work->conn->llist_lock);
7127                                 ksmbd_debug(SMB, "successful in taking lock\n");
7128                         } else {
7129                                 goto out;
7130                         }
7131                 }
7132         }
7133
7134         if (atomic_read(&fp->f_ci->op_count) > 1)
7135                 smb_break_all_oplock(work, fp);
7136
7137         rsp->StructureSize = cpu_to_le16(4);
7138         ksmbd_debug(SMB, "successful in taking lock\n");
7139         rsp->hdr.Status = STATUS_SUCCESS;
7140         rsp->Reserved = 0;
7141         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7142         if (err)
7143                 goto out;
7144
7145         ksmbd_fd_put(work, fp);
7146         return 0;
7147
7148 out:
7149         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7150                 locks_free_lock(smb_lock->fl);
7151                 list_del(&smb_lock->llist);
7152                 kfree(smb_lock);
7153         }
7154
7155         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7156                 struct file_lock *rlock = NULL;
7157
7158                 rlock = smb_flock_init(filp);
7159                 rlock->fl_type = F_UNLCK;
7160                 rlock->fl_start = smb_lock->start;
7161                 rlock->fl_end = smb_lock->end;
7162
7163                 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7164                 if (rc)
7165                         pr_err("rollback unlock fail : %d\n", rc);
7166
7167                 list_del(&smb_lock->llist);
7168                 spin_lock(&work->conn->llist_lock);
7169                 if (!list_empty(&smb_lock->flist))
7170                         list_del(&smb_lock->flist);
7171                 list_del(&smb_lock->clist);
7172                 spin_unlock(&work->conn->llist_lock);
7173
7174                 locks_free_lock(smb_lock->fl);
7175                 locks_free_lock(rlock);
7176                 kfree(smb_lock);
7177         }
7178 out2:
7179         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7180
7181         if (!rsp->hdr.Status) {
7182                 if (err == -EINVAL)
7183                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7184                 else if (err == -ENOMEM)
7185                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7186                 else if (err == -ENOENT)
7187                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7188                 else
7189                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7190         }
7191
7192         smb2_set_err_rsp(work);
7193         ksmbd_fd_put(work, fp);
7194         return err;
7195 }
7196
7197 static int fsctl_copychunk(struct ksmbd_work *work,
7198                            struct copychunk_ioctl_req *ci_req,
7199                            unsigned int cnt_code,
7200                            unsigned int input_count,
7201                            unsigned long long volatile_id,
7202                            unsigned long long persistent_id,
7203                            struct smb2_ioctl_rsp *rsp)
7204 {
7205         struct copychunk_ioctl_rsp *ci_rsp;
7206         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7207         struct srv_copychunk *chunks;
7208         unsigned int i, chunk_count, chunk_count_written = 0;
7209         unsigned int chunk_size_written = 0;
7210         loff_t total_size_written = 0;
7211         int ret = 0;
7212
7213         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7214
7215         rsp->VolatileFileId = volatile_id;
7216         rsp->PersistentFileId = persistent_id;
7217         ci_rsp->ChunksWritten =
7218                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7219         ci_rsp->ChunkBytesWritten =
7220                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7221         ci_rsp->TotalBytesWritten =
7222                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7223
7224         chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7225         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7226         if (chunk_count == 0)
7227                 goto out;
7228         total_size_written = 0;
7229
7230         /* verify the SRV_COPYCHUNK_COPY packet */
7231         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7232             input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7233              chunk_count * sizeof(struct srv_copychunk)) {
7234                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7235                 return -EINVAL;
7236         }
7237
7238         for (i = 0; i < chunk_count; i++) {
7239                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7240                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7241                         break;
7242                 total_size_written += le32_to_cpu(chunks[i].Length);
7243         }
7244
7245         if (i < chunk_count ||
7246             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7247                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7248                 return -EINVAL;
7249         }
7250
7251         src_fp = ksmbd_lookup_foreign_fd(work,
7252                                          le64_to_cpu(ci_req->ResumeKey[0]));
7253         dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7254         ret = -EINVAL;
7255         if (!src_fp ||
7256             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7257                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7258                 goto out;
7259         }
7260
7261         if (!dst_fp) {
7262                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7263                 goto out;
7264         }
7265
7266         /*
7267          * FILE_READ_DATA should only be included in
7268          * the FSCTL_COPYCHUNK case
7269          */
7270         if (cnt_code == FSCTL_COPYCHUNK &&
7271             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7272                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7273                 goto out;
7274         }
7275
7276         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7277                                          chunks, chunk_count,
7278                                          &chunk_count_written,
7279                                          &chunk_size_written,
7280                                          &total_size_written);
7281         if (ret < 0) {
7282                 if (ret == -EACCES)
7283                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7284                 if (ret == -EAGAIN)
7285                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7286                 else if (ret == -EBADF)
7287                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7288                 else if (ret == -EFBIG || ret == -ENOSPC)
7289                         rsp->hdr.Status = STATUS_DISK_FULL;
7290                 else if (ret == -EINVAL)
7291                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7292                 else if (ret == -EISDIR)
7293                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7294                 else if (ret == -E2BIG)
7295                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7296                 else
7297                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7298         }
7299
7300         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7301         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7302         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7303 out:
7304         ksmbd_fd_put(work, src_fp);
7305         ksmbd_fd_put(work, dst_fp);
7306         return ret;
7307 }
7308
7309 static __be32 idev_ipv4_address(struct in_device *idev)
7310 {
7311         __be32 addr = 0;
7312
7313         struct in_ifaddr *ifa;
7314
7315         rcu_read_lock();
7316         in_dev_for_each_ifa_rcu(ifa, idev) {
7317                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7318                         continue;
7319
7320                 addr = ifa->ifa_address;
7321                 break;
7322         }
7323         rcu_read_unlock();
7324         return addr;
7325 }
7326
7327 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7328                                         struct smb2_ioctl_rsp *rsp,
7329                                         unsigned int out_buf_len)
7330 {
7331         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7332         int nbytes = 0;
7333         struct net_device *netdev;
7334         struct sockaddr_storage_rsp *sockaddr_storage;
7335         unsigned int flags;
7336         unsigned long long speed;
7337
7338         rtnl_lock();
7339         for_each_netdev(&init_net, netdev) {
7340                 bool ipv4_set = false;
7341
7342                 if (netdev->type == ARPHRD_LOOPBACK)
7343                         continue;
7344
7345                 flags = dev_get_flags(netdev);
7346                 if (!(flags & IFF_RUNNING))
7347                         continue;
7348 ipv6_retry:
7349                 if (out_buf_len <
7350                     nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7351                         rtnl_unlock();
7352                         return -ENOSPC;
7353                 }
7354
7355                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7356                                 &rsp->Buffer[nbytes];
7357                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7358
7359                 nii_rsp->Capability = 0;
7360                 if (netdev->real_num_tx_queues > 1)
7361                         nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7362                 if (ksmbd_rdma_capable_netdev(netdev))
7363                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7364
7365                 nii_rsp->Next = cpu_to_le32(152);
7366                 nii_rsp->Reserved = 0;
7367
7368                 if (netdev->ethtool_ops->get_link_ksettings) {
7369                         struct ethtool_link_ksettings cmd;
7370
7371                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7372                         speed = cmd.base.speed;
7373                 } else {
7374                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7375                                     "speed is unknown, defaulting to 1Gb/sec");
7376                         speed = SPEED_1000;
7377                 }
7378
7379                 speed *= 1000000;
7380                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7381
7382                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7383                                         nii_rsp->SockAddr_Storage;
7384                 memset(sockaddr_storage, 0, 128);
7385
7386                 if (!ipv4_set) {
7387                         struct in_device *idev;
7388
7389                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7390                         sockaddr_storage->addr4.Port = 0;
7391
7392                         idev = __in_dev_get_rtnl(netdev);
7393                         if (!idev)
7394                                 continue;
7395                         sockaddr_storage->addr4.IPv4address =
7396                                                 idev_ipv4_address(idev);
7397                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7398                         ipv4_set = true;
7399                         goto ipv6_retry;
7400                 } else {
7401                         struct inet6_dev *idev6;
7402                         struct inet6_ifaddr *ifa;
7403                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7404
7405                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7406                         sockaddr_storage->addr6.Port = 0;
7407                         sockaddr_storage->addr6.FlowInfo = 0;
7408
7409                         idev6 = __in6_dev_get(netdev);
7410                         if (!idev6)
7411                                 continue;
7412
7413                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7414                                 if (ifa->flags & (IFA_F_TENTATIVE |
7415                                                         IFA_F_DEPRECATED))
7416                                         continue;
7417                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7418                                 break;
7419                         }
7420                         sockaddr_storage->addr6.ScopeId = 0;
7421                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7422                 }
7423         }
7424         rtnl_unlock();
7425
7426         /* zero if this is last one */
7427         if (nii_rsp)
7428                 nii_rsp->Next = 0;
7429
7430         rsp->PersistentFileId = SMB2_NO_FID;
7431         rsp->VolatileFileId = SMB2_NO_FID;
7432         return nbytes;
7433 }
7434
7435 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7436                                          struct validate_negotiate_info_req *neg_req,
7437                                          struct validate_negotiate_info_rsp *neg_rsp,
7438                                          unsigned int in_buf_len)
7439 {
7440         int ret = 0;
7441         int dialect;
7442
7443         if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7444                         le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7445                 return -EINVAL;
7446
7447         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7448                                              neg_req->DialectCount);
7449         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7450                 ret = -EINVAL;
7451                 goto err_out;
7452         }
7453
7454         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7455                 ret = -EINVAL;
7456                 goto err_out;
7457         }
7458
7459         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7460                 ret = -EINVAL;
7461                 goto err_out;
7462         }
7463
7464         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7465                 ret = -EINVAL;
7466                 goto err_out;
7467         }
7468
7469         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7470         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7471         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7472         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7473 err_out:
7474         return ret;
7475 }
7476
7477 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7478                                         struct file_allocated_range_buffer *qar_req,
7479                                         struct file_allocated_range_buffer *qar_rsp,
7480                                         unsigned int in_count, unsigned int *out_count)
7481 {
7482         struct ksmbd_file *fp;
7483         loff_t start, length;
7484         int ret = 0;
7485
7486         *out_count = 0;
7487         if (in_count == 0)
7488                 return -EINVAL;
7489
7490         start = le64_to_cpu(qar_req->file_offset);
7491         length = le64_to_cpu(qar_req->length);
7492
7493         if (start < 0 || length < 0)
7494                 return -EINVAL;
7495
7496         fp = ksmbd_lookup_fd_fast(work, id);
7497         if (!fp)
7498                 return -ENOENT;
7499
7500         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7501                                    qar_rsp, in_count, out_count);
7502         if (ret && ret != -E2BIG)
7503                 *out_count = 0;
7504
7505         ksmbd_fd_put(work, fp);
7506         return ret;
7507 }
7508
7509 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7510                                  unsigned int out_buf_len,
7511                                  struct smb2_ioctl_req *req,
7512                                  struct smb2_ioctl_rsp *rsp)
7513 {
7514         struct ksmbd_rpc_command *rpc_resp;
7515         char *data_buf = (char *)&req->Buffer[0];
7516         int nbytes = 0;
7517
7518         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7519                                    le32_to_cpu(req->InputCount));
7520         if (rpc_resp) {
7521                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7522                         /*
7523                          * set STATUS_SOME_NOT_MAPPED response
7524                          * for unknown domain sid.
7525                          */
7526                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7527                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7528                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7529                         goto out;
7530                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7531                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7532                         goto out;
7533                 }
7534
7535                 nbytes = rpc_resp->payload_sz;
7536                 if (rpc_resp->payload_sz > out_buf_len) {
7537                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7538                         nbytes = out_buf_len;
7539                 }
7540
7541                 if (!rpc_resp->payload_sz) {
7542                         rsp->hdr.Status =
7543                                 STATUS_UNEXPECTED_IO_ERROR;
7544                         goto out;
7545                 }
7546
7547                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7548         }
7549 out:
7550         kvfree(rpc_resp);
7551         return nbytes;
7552 }
7553
7554 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7555                                    struct file_sparse *sparse)
7556 {
7557         struct ksmbd_file *fp;
7558         struct mnt_idmap *idmap;
7559         int ret = 0;
7560         __le32 old_fattr;
7561
7562         fp = ksmbd_lookup_fd_fast(work, id);
7563         if (!fp)
7564                 return -ENOENT;
7565         idmap = file_mnt_idmap(fp->filp);
7566
7567         old_fattr = fp->f_ci->m_fattr;
7568         if (sparse->SetSparse)
7569                 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7570         else
7571                 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7572
7573         if (fp->f_ci->m_fattr != old_fattr &&
7574             test_share_config_flag(work->tcon->share_conf,
7575                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7576                 struct xattr_dos_attrib da;
7577
7578                 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7579                                                      fp->filp->f_path.dentry, &da);
7580                 if (ret <= 0)
7581                         goto out;
7582
7583                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7584                 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7585                                                      &fp->filp->f_path, &da);
7586                 if (ret)
7587                         fp->f_ci->m_fattr = old_fattr;
7588         }
7589
7590 out:
7591         ksmbd_fd_put(work, fp);
7592         return ret;
7593 }
7594
7595 static int fsctl_request_resume_key(struct ksmbd_work *work,
7596                                     struct smb2_ioctl_req *req,
7597                                     struct resume_key_ioctl_rsp *key_rsp)
7598 {
7599         struct ksmbd_file *fp;
7600
7601         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7602         if (!fp)
7603                 return -ENOENT;
7604
7605         memset(key_rsp, 0, sizeof(*key_rsp));
7606         key_rsp->ResumeKey[0] = req->VolatileFileId;
7607         key_rsp->ResumeKey[1] = req->PersistentFileId;
7608         ksmbd_fd_put(work, fp);
7609
7610         return 0;
7611 }
7612
7613 /**
7614  * smb2_ioctl() - handler for smb2 ioctl command
7615  * @work:       smb work containing ioctl command buffer
7616  *
7617  * Return:      0 on success, otherwise error
7618  */
7619 int smb2_ioctl(struct ksmbd_work *work)
7620 {
7621         struct smb2_ioctl_req *req;
7622         struct smb2_ioctl_rsp *rsp;
7623         unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7624         u64 id = KSMBD_NO_FID;
7625         struct ksmbd_conn *conn = work->conn;
7626         int ret = 0;
7627
7628         if (work->next_smb2_rcv_hdr_off) {
7629                 req = ksmbd_req_buf_next(work);
7630                 rsp = ksmbd_resp_buf_next(work);
7631                 if (!has_file_id(req->VolatileFileId)) {
7632                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7633                                     work->compound_fid);
7634                         id = work->compound_fid;
7635                 }
7636         } else {
7637                 req = smb2_get_msg(work->request_buf);
7638                 rsp = smb2_get_msg(work->response_buf);
7639         }
7640
7641         if (!has_file_id(id))
7642                 id = req->VolatileFileId;
7643
7644         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7645                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7646                 goto out;
7647         }
7648
7649         cnt_code = le32_to_cpu(req->CtlCode);
7650         ret = smb2_calc_max_out_buf_len(work, 48,
7651                                         le32_to_cpu(req->MaxOutputResponse));
7652         if (ret < 0) {
7653                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7654                 goto out;
7655         }
7656         out_buf_len = (unsigned int)ret;
7657         in_buf_len = le32_to_cpu(req->InputCount);
7658
7659         switch (cnt_code) {
7660         case FSCTL_DFS_GET_REFERRALS:
7661         case FSCTL_DFS_GET_REFERRALS_EX:
7662                 /* Not support DFS yet */
7663                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7664                 goto out;
7665         case FSCTL_CREATE_OR_GET_OBJECT_ID:
7666         {
7667                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7668
7669                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7670                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7671                         &rsp->Buffer[0];
7672
7673                 /*
7674                  * TODO: This is dummy implementation to pass smbtorture
7675                  * Need to check correct response later
7676                  */
7677                 memset(obj_buf->ObjectId, 0x0, 16);
7678                 memset(obj_buf->BirthVolumeId, 0x0, 16);
7679                 memset(obj_buf->BirthObjectId, 0x0, 16);
7680                 memset(obj_buf->DomainId, 0x0, 16);
7681
7682                 break;
7683         }
7684         case FSCTL_PIPE_TRANSCEIVE:
7685                 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7686                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7687                 break;
7688         case FSCTL_VALIDATE_NEGOTIATE_INFO:
7689                 if (conn->dialect < SMB30_PROT_ID) {
7690                         ret = -EOPNOTSUPP;
7691                         goto out;
7692                 }
7693
7694                 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
7695                                           Dialects)) {
7696                         ret = -EINVAL;
7697                         goto out;
7698                 }
7699
7700                 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
7701                         ret = -EINVAL;
7702                         goto out;
7703                 }
7704
7705                 ret = fsctl_validate_negotiate_info(conn,
7706                         (struct validate_negotiate_info_req *)&req->Buffer[0],
7707                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7708                         in_buf_len);
7709                 if (ret < 0)
7710                         goto out;
7711
7712                 nbytes = sizeof(struct validate_negotiate_info_rsp);
7713                 rsp->PersistentFileId = SMB2_NO_FID;
7714                 rsp->VolatileFileId = SMB2_NO_FID;
7715                 break;
7716         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7717                 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7718                 if (ret < 0)
7719                         goto out;
7720                 nbytes = ret;
7721                 break;
7722         case FSCTL_REQUEST_RESUME_KEY:
7723                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7724                         ret = -EINVAL;
7725                         goto out;
7726                 }
7727
7728                 ret = fsctl_request_resume_key(work, req,
7729                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7730                 if (ret < 0)
7731                         goto out;
7732                 rsp->PersistentFileId = req->PersistentFileId;
7733                 rsp->VolatileFileId = req->VolatileFileId;
7734                 nbytes = sizeof(struct resume_key_ioctl_rsp);
7735                 break;
7736         case FSCTL_COPYCHUNK:
7737         case FSCTL_COPYCHUNK_WRITE:
7738                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7739                         ksmbd_debug(SMB,
7740                                     "User does not have write permission\n");
7741                         ret = -EACCES;
7742                         goto out;
7743                 }
7744
7745                 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7746                         ret = -EINVAL;
7747                         goto out;
7748                 }
7749
7750                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7751                         ret = -EINVAL;
7752                         goto out;
7753                 }
7754
7755                 nbytes = sizeof(struct copychunk_ioctl_rsp);
7756                 rsp->VolatileFileId = req->VolatileFileId;
7757                 rsp->PersistentFileId = req->PersistentFileId;
7758                 fsctl_copychunk(work,
7759                                 (struct copychunk_ioctl_req *)&req->Buffer[0],
7760                                 le32_to_cpu(req->CtlCode),
7761                                 le32_to_cpu(req->InputCount),
7762                                 req->VolatileFileId,
7763                                 req->PersistentFileId,
7764                                 rsp);
7765                 break;
7766         case FSCTL_SET_SPARSE:
7767                 if (in_buf_len < sizeof(struct file_sparse)) {
7768                         ret = -EINVAL;
7769                         goto out;
7770                 }
7771
7772                 ret = fsctl_set_sparse(work, id,
7773                                        (struct file_sparse *)&req->Buffer[0]);
7774                 if (ret < 0)
7775                         goto out;
7776                 break;
7777         case FSCTL_SET_ZERO_DATA:
7778         {
7779                 struct file_zero_data_information *zero_data;
7780                 struct ksmbd_file *fp;
7781                 loff_t off, len, bfz;
7782
7783                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7784                         ksmbd_debug(SMB,
7785                                     "User does not have write permission\n");
7786                         ret = -EACCES;
7787                         goto out;
7788                 }
7789
7790                 if (in_buf_len < sizeof(struct file_zero_data_information)) {
7791                         ret = -EINVAL;
7792                         goto out;
7793                 }
7794
7795                 zero_data =
7796                         (struct file_zero_data_information *)&req->Buffer[0];
7797
7798                 off = le64_to_cpu(zero_data->FileOffset);
7799                 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
7800                 if (off < 0 || bfz < 0 || off > bfz) {
7801                         ret = -EINVAL;
7802                         goto out;
7803                 }
7804
7805                 len = bfz - off;
7806                 if (len) {
7807                         fp = ksmbd_lookup_fd_fast(work, id);
7808                         if (!fp) {
7809                                 ret = -ENOENT;
7810                                 goto out;
7811                         }
7812
7813                         ret = ksmbd_vfs_zero_data(work, fp, off, len);
7814                         ksmbd_fd_put(work, fp);
7815                         if (ret < 0)
7816                                 goto out;
7817                 }
7818                 break;
7819         }
7820         case FSCTL_QUERY_ALLOCATED_RANGES:
7821                 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7822                         ret = -EINVAL;
7823                         goto out;
7824                 }
7825
7826                 ret = fsctl_query_allocated_ranges(work, id,
7827                         (struct file_allocated_range_buffer *)&req->Buffer[0],
7828                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7829                         out_buf_len /
7830                         sizeof(struct file_allocated_range_buffer), &nbytes);
7831                 if (ret == -E2BIG) {
7832                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7833                 } else if (ret < 0) {
7834                         nbytes = 0;
7835                         goto out;
7836                 }
7837
7838                 nbytes *= sizeof(struct file_allocated_range_buffer);
7839                 break;
7840         case FSCTL_GET_REPARSE_POINT:
7841         {
7842                 struct reparse_data_buffer *reparse_ptr;
7843                 struct ksmbd_file *fp;
7844
7845                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7846                 fp = ksmbd_lookup_fd_fast(work, id);
7847                 if (!fp) {
7848                         pr_err("not found fp!!\n");
7849                         ret = -ENOENT;
7850                         goto out;
7851                 }
7852
7853                 reparse_ptr->ReparseTag =
7854                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7855                 reparse_ptr->ReparseDataLength = 0;
7856                 ksmbd_fd_put(work, fp);
7857                 nbytes = sizeof(struct reparse_data_buffer);
7858                 break;
7859         }
7860         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7861         {
7862                 struct ksmbd_file *fp_in, *fp_out = NULL;
7863                 struct duplicate_extents_to_file *dup_ext;
7864                 loff_t src_off, dst_off, length, cloned;
7865
7866                 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7867                         ret = -EINVAL;
7868                         goto out;
7869                 }
7870
7871                 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7872
7873                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7874                                              dup_ext->PersistentFileHandle);
7875                 if (!fp_in) {
7876                         pr_err("not found file handle in duplicate extent to file\n");
7877                         ret = -ENOENT;
7878                         goto out;
7879                 }
7880
7881                 fp_out = ksmbd_lookup_fd_fast(work, id);
7882                 if (!fp_out) {
7883                         pr_err("not found fp\n");
7884                         ret = -ENOENT;
7885                         goto dup_ext_out;
7886                 }
7887
7888                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7889                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7890                 length = le64_to_cpu(dup_ext->ByteCount);
7891                 /*
7892                  * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
7893                  * should fall back to vfs_copy_file_range().  This could be
7894                  * beneficial when re-exporting nfs/smb mount, but note that
7895                  * this can result in partial copy that returns an error status.
7896                  * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
7897                  * fall back to vfs_copy_file_range(), should be avoided when
7898                  * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
7899                  */
7900                 cloned = vfs_clone_file_range(fp_in->filp, src_off,
7901                                               fp_out->filp, dst_off, length, 0);
7902                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7903                         ret = -EOPNOTSUPP;
7904                         goto dup_ext_out;
7905                 } else if (cloned != length) {
7906                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
7907                                                      fp_out->filp, dst_off,
7908                                                      length, 0);
7909                         if (cloned != length) {
7910                                 if (cloned < 0)
7911                                         ret = cloned;
7912                                 else
7913                                         ret = -EINVAL;
7914                         }
7915                 }
7916
7917 dup_ext_out:
7918                 ksmbd_fd_put(work, fp_in);
7919                 ksmbd_fd_put(work, fp_out);
7920                 if (ret < 0)
7921                         goto out;
7922                 break;
7923         }
7924         default:
7925                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7926                             cnt_code);
7927                 ret = -EOPNOTSUPP;
7928                 goto out;
7929         }
7930
7931         rsp->CtlCode = cpu_to_le32(cnt_code);
7932         rsp->InputCount = cpu_to_le32(0);
7933         rsp->InputOffset = cpu_to_le32(112);
7934         rsp->OutputOffset = cpu_to_le32(112);
7935         rsp->OutputCount = cpu_to_le32(nbytes);
7936         rsp->StructureSize = cpu_to_le16(49);
7937         rsp->Reserved = cpu_to_le16(0);
7938         rsp->Flags = cpu_to_le32(0);
7939         rsp->Reserved2 = cpu_to_le32(0);
7940         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
7941         if (!ret)
7942                 return ret;
7943
7944 out:
7945         if (ret == -EACCES)
7946                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7947         else if (ret == -ENOENT)
7948                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7949         else if (ret == -EOPNOTSUPP)
7950                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7951         else if (ret == -ENOSPC)
7952                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7953         else if (ret < 0 || rsp->hdr.Status == 0)
7954                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7955         smb2_set_err_rsp(work);
7956         return 0;
7957 }
7958
7959 /**
7960  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7961  * @work:       smb work containing oplock break command buffer
7962  *
7963  * Return:      0
7964  */
7965 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7966 {
7967         struct smb2_oplock_break *req;
7968         struct smb2_oplock_break *rsp;
7969         struct ksmbd_file *fp;
7970         struct oplock_info *opinfo = NULL;
7971         __le32 err = 0;
7972         int ret = 0;
7973         u64 volatile_id, persistent_id;
7974         char req_oplevel = 0, rsp_oplevel = 0;
7975         unsigned int oplock_change_type;
7976
7977         WORK_BUFFERS(work, req, rsp);
7978
7979         volatile_id = req->VolatileFid;
7980         persistent_id = req->PersistentFid;
7981         req_oplevel = req->OplockLevel;
7982         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7983                     volatile_id, persistent_id, req_oplevel);
7984
7985         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7986         if (!fp) {
7987                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7988                 smb2_set_err_rsp(work);
7989                 return;
7990         }
7991
7992         opinfo = opinfo_get(fp);
7993         if (!opinfo) {
7994                 pr_err("unexpected null oplock_info\n");
7995                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7996                 smb2_set_err_rsp(work);
7997                 ksmbd_fd_put(work, fp);
7998                 return;
7999         }
8000
8001         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8002                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8003                 goto err_out;
8004         }
8005
8006         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8007                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8008                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8009                 goto err_out;
8010         }
8011
8012         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8013              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8014             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8015              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8016                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8017                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8018         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8019                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8020                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8021                 oplock_change_type = OPLOCK_READ_TO_NONE;
8022         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8023                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8024                 err = STATUS_INVALID_DEVICE_STATE;
8025                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8026                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8027                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8028                         oplock_change_type = OPLOCK_WRITE_TO_READ;
8029                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8030                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8031                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8032                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
8033                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8034                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8035                         oplock_change_type = OPLOCK_READ_TO_NONE;
8036                 } else {
8037                         oplock_change_type = 0;
8038                 }
8039         } else {
8040                 oplock_change_type = 0;
8041         }
8042
8043         switch (oplock_change_type) {
8044         case OPLOCK_WRITE_TO_READ:
8045                 ret = opinfo_write_to_read(opinfo);
8046                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8047                 break;
8048         case OPLOCK_WRITE_TO_NONE:
8049                 ret = opinfo_write_to_none(opinfo);
8050                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8051                 break;
8052         case OPLOCK_READ_TO_NONE:
8053                 ret = opinfo_read_to_none(opinfo);
8054                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8055                 break;
8056         default:
8057                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8058                        opinfo->level, rsp_oplevel);
8059         }
8060
8061         if (ret < 0) {
8062                 rsp->hdr.Status = err;
8063                 goto err_out;
8064         }
8065
8066         opinfo->op_state = OPLOCK_STATE_NONE;
8067         wake_up_interruptible_all(&opinfo->oplock_q);
8068         opinfo_put(opinfo);
8069         ksmbd_fd_put(work, fp);
8070
8071         rsp->StructureSize = cpu_to_le16(24);
8072         rsp->OplockLevel = rsp_oplevel;
8073         rsp->Reserved = 0;
8074         rsp->Reserved2 = 0;
8075         rsp->VolatileFid = volatile_id;
8076         rsp->PersistentFid = persistent_id;
8077         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8078         if (!ret)
8079                 return;
8080
8081 err_out:
8082         opinfo->op_state = OPLOCK_STATE_NONE;
8083         wake_up_interruptible_all(&opinfo->oplock_q);
8084
8085         opinfo_put(opinfo);
8086         ksmbd_fd_put(work, fp);
8087         smb2_set_err_rsp(work);
8088 }
8089
8090 static int check_lease_state(struct lease *lease, __le32 req_state)
8091 {
8092         if ((lease->new_state ==
8093              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8094             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8095                 lease->new_state = req_state;
8096                 return 0;
8097         }
8098
8099         if (lease->new_state == req_state)
8100                 return 0;
8101
8102         return 1;
8103 }
8104
8105 /**
8106  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8107  * @work:       smb work containing lease break command buffer
8108  *
8109  * Return:      0
8110  */
8111 static void smb21_lease_break_ack(struct ksmbd_work *work)
8112 {
8113         struct ksmbd_conn *conn = work->conn;
8114         struct smb2_lease_ack *req;
8115         struct smb2_lease_ack *rsp;
8116         struct oplock_info *opinfo;
8117         __le32 err = 0;
8118         int ret = 0;
8119         unsigned int lease_change_type;
8120         __le32 lease_state;
8121         struct lease *lease;
8122
8123         WORK_BUFFERS(work, req, rsp);
8124
8125         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8126                     le32_to_cpu(req->LeaseState));
8127         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8128         if (!opinfo) {
8129                 ksmbd_debug(OPLOCK, "file not opened\n");
8130                 smb2_set_err_rsp(work);
8131                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8132                 return;
8133         }
8134         lease = opinfo->o_lease;
8135
8136         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8137                 pr_err("unexpected lease break state 0x%x\n",
8138                        opinfo->op_state);
8139                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8140                 goto err_out;
8141         }
8142
8143         if (check_lease_state(lease, req->LeaseState)) {
8144                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8145                 ksmbd_debug(OPLOCK,
8146                             "req lease state: 0x%x, expected state: 0x%x\n",
8147                             req->LeaseState, lease->new_state);
8148                 goto err_out;
8149         }
8150
8151         if (!atomic_read(&opinfo->breaking_cnt)) {
8152                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8153                 goto err_out;
8154         }
8155
8156         /* check for bad lease state */
8157         if (req->LeaseState &
8158             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8159                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8160                 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8161                         lease_change_type = OPLOCK_WRITE_TO_NONE;
8162                 else
8163                         lease_change_type = OPLOCK_READ_TO_NONE;
8164                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8165                             le32_to_cpu(lease->state),
8166                             le32_to_cpu(req->LeaseState));
8167         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8168                    req->LeaseState != SMB2_LEASE_NONE_LE) {
8169                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8170                 lease_change_type = OPLOCK_READ_TO_NONE;
8171                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8172                             le32_to_cpu(lease->state),
8173                             le32_to_cpu(req->LeaseState));
8174         } else {
8175                 /* valid lease state changes */
8176                 err = STATUS_INVALID_DEVICE_STATE;
8177                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8178                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8179                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
8180                         else
8181                                 lease_change_type = OPLOCK_READ_TO_NONE;
8182                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8183                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8184                                 lease_change_type = OPLOCK_WRITE_TO_READ;
8185                         else
8186                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8187                 } else {
8188                         lease_change_type = 0;
8189                 }
8190         }
8191
8192         switch (lease_change_type) {
8193         case OPLOCK_WRITE_TO_READ:
8194                 ret = opinfo_write_to_read(opinfo);
8195                 break;
8196         case OPLOCK_READ_HANDLE_TO_READ:
8197                 ret = opinfo_read_handle_to_read(opinfo);
8198                 break;
8199         case OPLOCK_WRITE_TO_NONE:
8200                 ret = opinfo_write_to_none(opinfo);
8201                 break;
8202         case OPLOCK_READ_TO_NONE:
8203                 ret = opinfo_read_to_none(opinfo);
8204                 break;
8205         default:
8206                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8207                             le32_to_cpu(lease->state),
8208                             le32_to_cpu(req->LeaseState));
8209         }
8210
8211         lease_state = lease->state;
8212         opinfo->op_state = OPLOCK_STATE_NONE;
8213         wake_up_interruptible_all(&opinfo->oplock_q);
8214         atomic_dec(&opinfo->breaking_cnt);
8215         wake_up_interruptible_all(&opinfo->oplock_brk);
8216         opinfo_put(opinfo);
8217
8218         if (ret < 0) {
8219                 rsp->hdr.Status = err;
8220                 goto err_out;
8221         }
8222
8223         rsp->StructureSize = cpu_to_le16(36);
8224         rsp->Reserved = 0;
8225         rsp->Flags = 0;
8226         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8227         rsp->LeaseState = lease_state;
8228         rsp->LeaseDuration = 0;
8229         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8230         if (!ret)
8231                 return;
8232
8233 err_out:
8234         opinfo->op_state = OPLOCK_STATE_NONE;
8235         wake_up_interruptible_all(&opinfo->oplock_q);
8236         atomic_dec(&opinfo->breaking_cnt);
8237         wake_up_interruptible_all(&opinfo->oplock_brk);
8238
8239         opinfo_put(opinfo);
8240         smb2_set_err_rsp(work);
8241 }
8242
8243 /**
8244  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8245  * @work:       smb work containing oplock/lease break command buffer
8246  *
8247  * Return:      0
8248  */
8249 int smb2_oplock_break(struct ksmbd_work *work)
8250 {
8251         struct smb2_oplock_break *req;
8252         struct smb2_oplock_break *rsp;
8253
8254         WORK_BUFFERS(work, req, rsp);
8255
8256         switch (le16_to_cpu(req->StructureSize)) {
8257         case OP_BREAK_STRUCT_SIZE_20:
8258                 smb20_oplock_break_ack(work);
8259                 break;
8260         case OP_BREAK_STRUCT_SIZE_21:
8261                 smb21_lease_break_ack(work);
8262                 break;
8263         default:
8264                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8265                             le16_to_cpu(req->StructureSize));
8266                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8267                 smb2_set_err_rsp(work);
8268         }
8269
8270         return 0;
8271 }
8272
8273 /**
8274  * smb2_notify() - handler for smb2 notify request
8275  * @work:   smb work containing notify command buffer
8276  *
8277  * Return:      0
8278  */
8279 int smb2_notify(struct ksmbd_work *work)
8280 {
8281         struct smb2_change_notify_req *req;
8282         struct smb2_change_notify_rsp *rsp;
8283
8284         WORK_BUFFERS(work, req, rsp);
8285
8286         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8287                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8288                 smb2_set_err_rsp(work);
8289                 return 0;
8290         }
8291
8292         smb2_set_err_rsp(work);
8293         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8294         return 0;
8295 }
8296
8297 /**
8298  * smb2_is_sign_req() - handler for checking packet signing status
8299  * @work:       smb work containing notify command buffer
8300  * @command:    SMB2 command id
8301  *
8302  * Return:      true if packed is signed, false otherwise
8303  */
8304 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8305 {
8306         struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8307
8308         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8309             command != SMB2_NEGOTIATE_HE &&
8310             command != SMB2_SESSION_SETUP_HE &&
8311             command != SMB2_OPLOCK_BREAK_HE)
8312                 return true;
8313
8314         return false;
8315 }
8316
8317 /**
8318  * smb2_check_sign_req() - handler for req packet sign processing
8319  * @work:   smb work containing notify command buffer
8320  *
8321  * Return:      1 on success, 0 otherwise
8322  */
8323 int smb2_check_sign_req(struct ksmbd_work *work)
8324 {
8325         struct smb2_hdr *hdr;
8326         char signature_req[SMB2_SIGNATURE_SIZE];
8327         char signature[SMB2_HMACSHA256_SIZE];
8328         struct kvec iov[1];
8329         size_t len;
8330
8331         hdr = smb2_get_msg(work->request_buf);
8332         if (work->next_smb2_rcv_hdr_off)
8333                 hdr = ksmbd_req_buf_next(work);
8334
8335         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8336                 len = get_rfc1002_len(work->request_buf);
8337         else if (hdr->NextCommand)
8338                 len = le32_to_cpu(hdr->NextCommand);
8339         else
8340                 len = get_rfc1002_len(work->request_buf) -
8341                         work->next_smb2_rcv_hdr_off;
8342
8343         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8344         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8345
8346         iov[0].iov_base = (char *)&hdr->ProtocolId;
8347         iov[0].iov_len = len;
8348
8349         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8350                                 signature))
8351                 return 0;
8352
8353         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8354                 pr_err("bad smb2 signature\n");
8355                 return 0;
8356         }
8357
8358         return 1;
8359 }
8360
8361 /**
8362  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8363  * @work:   smb work containing notify command buffer
8364  *
8365  */
8366 void smb2_set_sign_rsp(struct ksmbd_work *work)
8367 {
8368         struct smb2_hdr *hdr;
8369         char signature[SMB2_HMACSHA256_SIZE];
8370         struct kvec *iov;
8371         int n_vec = 1;
8372
8373         hdr = ksmbd_resp_buf_curr(work);
8374         hdr->Flags |= SMB2_FLAGS_SIGNED;
8375         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8376
8377         if (hdr->Command == SMB2_READ) {
8378                 iov = &work->iov[work->iov_idx - 1];
8379                 n_vec++;
8380         } else {
8381                 iov = &work->iov[work->iov_idx];
8382         }
8383
8384         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8385                                  signature))
8386                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8387 }
8388
8389 /**
8390  * smb3_check_sign_req() - handler for req packet sign processing
8391  * @work:   smb work containing notify command buffer
8392  *
8393  * Return:      1 on success, 0 otherwise
8394  */
8395 int smb3_check_sign_req(struct ksmbd_work *work)
8396 {
8397         struct ksmbd_conn *conn = work->conn;
8398         char *signing_key;
8399         struct smb2_hdr *hdr;
8400         struct channel *chann;
8401         char signature_req[SMB2_SIGNATURE_SIZE];
8402         char signature[SMB2_CMACAES_SIZE];
8403         struct kvec iov[1];
8404         size_t len;
8405
8406         hdr = smb2_get_msg(work->request_buf);
8407         if (work->next_smb2_rcv_hdr_off)
8408                 hdr = ksmbd_req_buf_next(work);
8409
8410         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8411                 len = get_rfc1002_len(work->request_buf);
8412         else if (hdr->NextCommand)
8413                 len = le32_to_cpu(hdr->NextCommand);
8414         else
8415                 len = get_rfc1002_len(work->request_buf) -
8416                         work->next_smb2_rcv_hdr_off;
8417
8418         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8419                 signing_key = work->sess->smb3signingkey;
8420         } else {
8421                 chann = lookup_chann_list(work->sess, conn);
8422                 if (!chann) {
8423                         return 0;
8424                 }
8425                 signing_key = chann->smb3signingkey;
8426         }
8427
8428         if (!signing_key) {
8429                 pr_err("SMB3 signing key is not generated\n");
8430                 return 0;
8431         }
8432
8433         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8434         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8435         iov[0].iov_base = (char *)&hdr->ProtocolId;
8436         iov[0].iov_len = len;
8437
8438         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8439                 return 0;
8440
8441         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8442                 pr_err("bad smb2 signature\n");
8443                 return 0;
8444         }
8445
8446         return 1;
8447 }
8448
8449 /**
8450  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8451  * @work:   smb work containing notify command buffer
8452  *
8453  */
8454 void smb3_set_sign_rsp(struct ksmbd_work *work)
8455 {
8456         struct ksmbd_conn *conn = work->conn;
8457         struct smb2_hdr *hdr;
8458         struct channel *chann;
8459         char signature[SMB2_CMACAES_SIZE];
8460         struct kvec *iov;
8461         int n_vec = 1;
8462         char *signing_key;
8463
8464         hdr = ksmbd_resp_buf_curr(work);
8465
8466         if (conn->binding == false &&
8467             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8468                 signing_key = work->sess->smb3signingkey;
8469         } else {
8470                 chann = lookup_chann_list(work->sess, work->conn);
8471                 if (!chann) {
8472                         return;
8473                 }
8474                 signing_key = chann->smb3signingkey;
8475         }
8476
8477         if (!signing_key)
8478                 return;
8479
8480         hdr->Flags |= SMB2_FLAGS_SIGNED;
8481         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8482
8483         if (hdr->Command == SMB2_READ) {
8484                 iov = &work->iov[work->iov_idx - 1];
8485                 n_vec++;
8486         } else {
8487                 iov = &work->iov[work->iov_idx];
8488         }
8489
8490         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8491                                  signature))
8492                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8493 }
8494
8495 /**
8496  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8497  * @work:   smb work containing response buffer
8498  *
8499  */
8500 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8501 {
8502         struct ksmbd_conn *conn = work->conn;
8503         struct ksmbd_session *sess = work->sess;
8504         struct smb2_hdr *req, *rsp;
8505
8506         if (conn->dialect != SMB311_PROT_ID)
8507                 return;
8508
8509         WORK_BUFFERS(work, req, rsp);
8510
8511         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8512             conn->preauth_info)
8513                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8514                                                  conn->preauth_info->Preauth_HashValue);
8515
8516         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8517                 __u8 *hash_value;
8518
8519                 if (conn->binding) {
8520                         struct preauth_session *preauth_sess;
8521
8522                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8523                         if (!preauth_sess)
8524                                 return;
8525                         hash_value = preauth_sess->Preauth_HashValue;
8526                 } else {
8527                         hash_value = sess->Preauth_HashValue;
8528                         if (!hash_value)
8529                                 return;
8530                 }
8531                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8532                                                  hash_value);
8533         }
8534 }
8535
8536 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8537 {
8538         struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8539         struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8540         unsigned int orig_len = get_rfc1002_len(old_buf);
8541
8542         /* tr_buf must be cleared by the caller */
8543         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8544         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8545         tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8546         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8547             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8548                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8549         else
8550                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8551         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8552         inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8553         inc_rfc1001_len(tr_buf, orig_len);
8554 }
8555
8556 int smb3_encrypt_resp(struct ksmbd_work *work)
8557 {
8558         struct kvec *iov = work->iov;
8559         int rc = -ENOMEM;
8560         void *tr_buf;
8561
8562         tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8563         if (!tr_buf)
8564                 return rc;
8565
8566         /* fill transform header */
8567         fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8568
8569         iov[0].iov_base = tr_buf;
8570         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8571         work->tr_buf = tr_buf;
8572
8573         return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8574 }
8575
8576 bool smb3_is_transform_hdr(void *buf)
8577 {
8578         struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8579
8580         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8581 }
8582
8583 int smb3_decrypt_req(struct ksmbd_work *work)
8584 {
8585         struct ksmbd_session *sess;
8586         char *buf = work->request_buf;
8587         unsigned int pdu_length = get_rfc1002_len(buf);
8588         struct kvec iov[2];
8589         int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8590         struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8591         int rc = 0;
8592
8593         if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8594             buf_data_size < sizeof(struct smb2_hdr)) {
8595                 pr_err("Transform message is too small (%u)\n",
8596                        pdu_length);
8597                 return -ECONNABORTED;
8598         }
8599
8600         if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8601                 pr_err("Transform message is broken\n");
8602                 return -ECONNABORTED;
8603         }
8604
8605         sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8606         if (!sess) {
8607                 pr_err("invalid session id(%llx) in transform header\n",
8608                        le64_to_cpu(tr_hdr->SessionId));
8609                 return -ECONNABORTED;
8610         }
8611
8612         iov[0].iov_base = buf;
8613         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8614         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8615         iov[1].iov_len = buf_data_size;
8616         rc = ksmbd_crypt_message(work, iov, 2, 0);
8617         if (rc)
8618                 return rc;
8619
8620         memmove(buf + 4, iov[1].iov_base, buf_data_size);
8621         *(__be32 *)buf = cpu_to_be32(buf_data_size);
8622
8623         return rc;
8624 }
8625
8626 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8627 {
8628         struct ksmbd_conn *conn = work->conn;
8629         struct ksmbd_session *sess = work->sess;
8630         struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8631
8632         if (conn->dialect < SMB30_PROT_ID)
8633                 return false;
8634
8635         if (work->next_smb2_rcv_hdr_off)
8636                 rsp = ksmbd_resp_buf_next(work);
8637
8638         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8639             sess->user && !user_guest(sess->user) &&
8640             rsp->Status == STATUS_SUCCESS)
8641                 return true;
8642         return false;
8643 }