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 ksmbd_conn *conn = work->conn;
 661         int id;
 662
 663         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 664         if (id < 0) {
 665                 pr_err("Failed to alloc async message id\n");
 666                 return id;
 667         }
 668         work->asynchronous = true;
 669         work->async_id = id;
 670
 671         ksmbd_debug(SMB,
 672                     "Send interim Response to inform async request id : %d\n",
 673                     work->async_id);
 674
 675         work->cancel_fn = fn;
 676         work->cancel_argv = arg;
 677
 678         if (list_empty(&work->async_request_entry)) {
 679                 spin_lock(&conn->request_lock);
 680                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 681                 spin_unlock(&conn->request_lock);
 682         }
 683
 684         return 0;
 685 }
 686
 687 void release_async_work(struct ksmbd_work *work)
 688 {
 689         struct ksmbd_conn *conn = work->conn;
 690
 691         spin_lock(&conn->request_lock);
 692         list_del_init(&work->async_request_entry);
 693         spin_unlock(&conn->request_lock);
 694
 695         work->asynchronous = 0;
 696         work->cancel_fn = NULL;
 697         kfree(work->cancel_argv);
 698         work->cancel_argv = NULL;
 699         if (work->async_id) {
 700                 ksmbd_release_id(&conn->async_ida, work->async_id);
 701                 work->async_id = 0;
 702         }
 703 }
 704
 705 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 706 {
 707         struct smb2_hdr *rsp_hdr;
 708         struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
 709
 710         if (allocate_interim_rsp_buf(in_work)) {
 711                 pr_err("smb_allocate_rsp_buf failed!\n");
 712                 ksmbd_free_work_struct(in_work);
 713                 return;
 714         }
 715
 716         in_work->conn = work->conn;
 717         memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
 718                __SMB2_HEADER_STRUCTURE_SIZE);
 719
 720         rsp_hdr = smb2_get_msg(in_work->response_buf);
 721         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 722         rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
 723         smb2_set_err_rsp(in_work);
 724         rsp_hdr->Status = status;
 725
 726         ksmbd_conn_write(in_work);
 727         ksmbd_free_work_struct(in_work);
 728 }
 729
 730 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 731 {
 732         if (S_ISDIR(mode) || S_ISREG(mode))
 733                 return 0;
 734
 735         if (S_ISLNK(mode))
 736                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 737         else if (S_ISFIFO(mode))
 738                 return IO_REPARSE_TAG_LX_FIFO_LE;
 739         else if (S_ISSOCK(mode))
 740                 return IO_REPARSE_TAG_AF_UNIX_LE;
 741         else if (S_ISCHR(mode))
 742                 return IO_REPARSE_TAG_LX_CHR_LE;
 743         else if (S_ISBLK(mode))
 744                 return IO_REPARSE_TAG_LX_BLK_LE;
 745
 746         return 0;
 747 }
 748
 749 /**
 750  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 751  * @stat:       kstat containing file mode
 752  * @attribute:  attribute flags
 753  *
 754  * Return:      converted dos mode
 755  */
 756 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 757 {
 758         int attr = 0;
 759
 760         if (S_ISDIR(stat->mode)) {
 761                 attr = FILE_ATTRIBUTE_DIRECTORY |
 762                         (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
 763         } else {
 764                 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
 765                 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
 766                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 767                                 FILE_SUPPORTS_SPARSE_FILES))
 768                         attr |= FILE_ATTRIBUTE_SPARSE_FILE;
 769
 770                 if (smb2_get_reparse_tag_special_file(stat->mode))
 771                         attr |= FILE_ATTRIBUTE_REPARSE_POINT;
 772         }
 773
 774         return attr;
 775 }
 776
 777 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 778                                __le16 hash_id)
 779 {
 780         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 781         pneg_ctxt->DataLength = cpu_to_le16(38);
 782         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 783         pneg_ctxt->Reserved = cpu_to_le32(0);
 784         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 785         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 786         pneg_ctxt->HashAlgorithms = hash_id;
 787 }
 788
 789 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 790                                __le16 cipher_type)
 791 {
 792         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 793         pneg_ctxt->DataLength = cpu_to_le16(4);
 794         pneg_ctxt->Reserved = cpu_to_le32(0);
 795         pneg_ctxt->CipherCount = cpu_to_le16(1);
 796         pneg_ctxt->Ciphers[0] = cipher_type;
 797 }
 798
 799 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 800                                 __le16 sign_algo)
 801 {
 802         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 803         pneg_ctxt->DataLength =
 804                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 805                         - sizeof(struct smb2_neg_context));
 806         pneg_ctxt->Reserved = cpu_to_le32(0);
 807         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 808         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 809 }
 810
 811 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 812 {
 813         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 814         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 815         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 816         pneg_ctxt->Name[0] = 0x93;
 817         pneg_ctxt->Name[1] = 0xAD;
 818         pneg_ctxt->Name[2] = 0x25;
 819         pneg_ctxt->Name[3] = 0x50;
 820         pneg_ctxt->Name[4] = 0x9C;
 821         pneg_ctxt->Name[5] = 0xB4;
 822         pneg_ctxt->Name[6] = 0x11;
 823         pneg_ctxt->Name[7] = 0xE7;
 824         pneg_ctxt->Name[8] = 0xB4;
 825         pneg_ctxt->Name[9] = 0x23;
 826         pneg_ctxt->Name[10] = 0x83;
 827         pneg_ctxt->Name[11] = 0xDE;
 828         pneg_ctxt->Name[12] = 0x96;
 829         pneg_ctxt->Name[13] = 0x8B;
 830         pneg_ctxt->Name[14] = 0xCD;
 831         pneg_ctxt->Name[15] = 0x7C;
 832 }
 833
 834 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
 835                                   struct smb2_negotiate_rsp *rsp)
 836 {
 837         char * const pneg_ctxt = (char *)rsp +
 838                         le32_to_cpu(rsp->NegotiateContextOffset);
 839         int neg_ctxt_cnt = 1;
 840         int ctxt_size;
 841
 842         ksmbd_debug(SMB,
 843                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 844         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 845                            conn->preauth_info->Preauth_HashId);
 846         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 847
 848         if (conn->cipher_type) {
 849                 /* Round to 8 byte boundary */
 850                 ctxt_size = round_up(ctxt_size, 8);
 851                 ksmbd_debug(SMB,
 852                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 853                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
 854                                    (pneg_ctxt + ctxt_size),
 855                                    conn->cipher_type);
 856                 neg_ctxt_cnt++;
 857                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 858         }
 859
 860         /* compression context not yet supported */
 861         WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
 862
 863         if (conn->posix_ext_supported) {
 864                 ctxt_size = round_up(ctxt_size, 8);
 865                 ksmbd_debug(SMB,
 866                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 867                 build_posix_ctxt((struct smb2_posix_neg_context *)
 868                                  (pneg_ctxt + ctxt_size));
 869                 neg_ctxt_cnt++;
 870                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 871         }
 872
 873         if (conn->signing_negotiated) {
 874                 ctxt_size = round_up(ctxt_size, 8);
 875                 ksmbd_debug(SMB,
 876                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 877                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
 878                                     (pneg_ctxt + ctxt_size),
 879                                     conn->signing_algorithm);
 880                 neg_ctxt_cnt++;
 881                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 882         }
 883
 884         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 885         return ctxt_size + AUTH_GSS_PADDING;
 886 }
 887
 888 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 889                                   struct smb2_preauth_neg_context *pneg_ctxt,
 890                                   int ctxt_len)
 891 {
 892         /*
 893          * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
 894          * which may not be present. Only check for used HashAlgorithms[1].
 895          */
 896         if (ctxt_len <
 897             sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
 898                 return STATUS_INVALID_PARAMETER;
 899
 900         if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
 901                 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 902
 903         conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
 904         return STATUS_SUCCESS;
 905 }
 906
 907 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 908                                 struct smb2_encryption_neg_context *pneg_ctxt,
 909                                 int ctxt_len)
 910 {
 911         int cph_cnt;
 912         int i, cphs_size;
 913
 914         if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
 915                 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
 916                 return;
 917         }
 918
 919         conn->cipher_type = 0;
 920
 921         cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 922         cphs_size = cph_cnt * sizeof(__le16);
 923
 924         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 925             ctxt_len) {
 926                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 927                 return;
 928         }
 929
 930         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
 931                 return;
 932
 933         for (i = 0; i < cph_cnt; i++) {
 934                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 935                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 936                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 937                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 938                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 939                                     pneg_ctxt->Ciphers[i]);
 940                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 941                         break;
 942                 }
 943         }
 944 }
 945
 946 /**
 947  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
 948  * @conn:       smb connection
 949  *
 950  * Return:      true if connection should be encrypted, else false
 951  */
 952 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
 953 {
 954         if (!conn->ops->generate_encryptionkey)
 955                 return false;
 956
 957         /*
 958          * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
 959          * SMB 3.1.1 uses the cipher_type field.
 960          */
 961         return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
 962             conn->cipher_type;
 963 }
 964
 965 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 966                                  struct smb2_compression_capabilities_context *pneg_ctxt)
 967 {
 968         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 969 }
 970
 971 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 972                                  struct smb2_signing_capabilities *pneg_ctxt,
 973                                  int ctxt_len)
 974 {
 975         int sign_algo_cnt;
 976         int i, sign_alos_size;
 977
 978         if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
 979                 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
 980                 return;
 981         }
 982
 983         conn->signing_negotiated = false;
 984         sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 985         sign_alos_size = sign_algo_cnt * sizeof(__le16);
 986
 987         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 988             ctxt_len) {
 989                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 990                 return;
 991         }
 992
 993         for (i = 0; i < sign_algo_cnt; i++) {
 994                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
 995                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
 996                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
 997                                     pneg_ctxt->SigningAlgorithms[i]);
 998                         conn->signing_negotiated = true;
 999                         conn->signing_algorithm =
1000                                 pneg_ctxt->SigningAlgorithms[i];
1001                         break;
1002                 }
1003         }
1004 }
1005
1006 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
1007                                       struct smb2_negotiate_req *req,
1008                                       unsigned int len_of_smb)
1009 {
1010         /* +4 is to account for the RFC1001 len field */
1011         struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
1012         int i = 0, len_of_ctxts;
1013         unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1014         unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1015         __le32 status = STATUS_INVALID_PARAMETER;
1016
1017         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1018         if (len_of_smb <= offset) {
1019                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1020                 return status;
1021         }
1022
1023         len_of_ctxts = len_of_smb - offset;
1024
1025         while (i++ < neg_ctxt_cnt) {
1026                 int clen, ctxt_len;
1027
1028                 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1029                         break;
1030
1031                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1032                 clen = le16_to_cpu(pctx->DataLength);
1033                 ctxt_len = clen + sizeof(struct smb2_neg_context);
1034
1035                 if (ctxt_len > len_of_ctxts)
1036                         break;
1037
1038                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1039                         ksmbd_debug(SMB,
1040                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1041                         if (conn->preauth_info->Preauth_HashId)
1042                                 break;
1043
1044                         status = decode_preauth_ctxt(conn,
1045                                                      (struct smb2_preauth_neg_context *)pctx,
1046                                                      ctxt_len);
1047                         if (status != STATUS_SUCCESS)
1048                                 break;
1049                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1050                         ksmbd_debug(SMB,
1051                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1052                         if (conn->cipher_type)
1053                                 break;
1054
1055                         decode_encrypt_ctxt(conn,
1056                                             (struct smb2_encryption_neg_context *)pctx,
1057                                             ctxt_len);
1058                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1059                         ksmbd_debug(SMB,
1060                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1061                         if (conn->compress_algorithm)
1062                                 break;
1063
1064                         decode_compress_ctxt(conn,
1065                                              (struct smb2_compression_capabilities_context *)pctx);
1066                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1067                         ksmbd_debug(SMB,
1068                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1069                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1070                         ksmbd_debug(SMB,
1071                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1072                         conn->posix_ext_supported = true;
1073                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1074                         ksmbd_debug(SMB,
1075                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1076
1077                         decode_sign_cap_ctxt(conn,
1078                                              (struct smb2_signing_capabilities *)pctx,
1079                                              ctxt_len);
1080                 }
1081
1082                 /* offsets must be 8 byte aligned */
1083                 offset = (ctxt_len + 7) & ~0x7;
1084                 len_of_ctxts -= offset;
1085         }
1086         return status;
1087 }
1088
1089 /**
1090  * smb2_handle_negotiate() - handler for smb2 negotiate command
1091  * @work:       smb work containing smb request buffer
1092  *
1093  * Return:      0
1094  */
1095 int smb2_handle_negotiate(struct ksmbd_work *work)
1096 {
1097         struct ksmbd_conn *conn = work->conn;
1098         struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1099         struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1100         int rc = 0;
1101         unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1102         __le32 status;
1103
1104         ksmbd_debug(SMB, "Received negotiate request\n");
1105         conn->need_neg = false;
1106         if (ksmbd_conn_good(conn)) {
1107                 pr_err("conn->tcp_status is already in CifsGood State\n");
1108                 work->send_no_response = 1;
1109                 return rc;
1110         }
1111
1112         smb2_buf_len = get_rfc1002_len(work->request_buf);
1113         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1114         if (smb2_neg_size > smb2_buf_len) {
1115                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1116                 rc = -EINVAL;
1117                 goto err_out;
1118         }
1119
1120         if (req->DialectCount == 0) {
1121                 pr_err("malformed packet\n");
1122                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1123                 rc = -EINVAL;
1124                 goto err_out;
1125         }
1126
1127         if (conn->dialect == SMB311_PROT_ID) {
1128                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1129
1130                 if (smb2_buf_len < nego_ctxt_off) {
1131                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1132                         rc = -EINVAL;
1133                         goto err_out;
1134                 }
1135
1136                 if (smb2_neg_size > nego_ctxt_off) {
1137                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1138                         rc = -EINVAL;
1139                         goto err_out;
1140                 }
1141
1142                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1143                     nego_ctxt_off) {
1144                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1145                         rc = -EINVAL;
1146                         goto err_out;
1147                 }
1148         } else {
1149                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1150                     smb2_buf_len) {
1151                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1152                         rc = -EINVAL;
1153                         goto err_out;
1154                 }
1155         }
1156
1157         conn->cli_cap = le32_to_cpu(req->Capabilities);
1158         switch (conn->dialect) {
1159         case SMB311_PROT_ID:
1160                 conn->preauth_info =
1161                         kzalloc(sizeof(struct preauth_integrity_info),
1162                                 GFP_KERNEL);
1163                 if (!conn->preauth_info) {
1164                         rc = -ENOMEM;
1165                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1166                         goto err_out;
1167                 }
1168
1169                 status = deassemble_neg_contexts(conn, req,
1170                                                  get_rfc1002_len(work->request_buf));
1171                 if (status != STATUS_SUCCESS) {
1172                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1173                                status);
1174                         rsp->hdr.Status = status;
1175                         rc = -EINVAL;
1176                         kfree(conn->preauth_info);
1177                         conn->preauth_info = NULL;
1178                         goto err_out;
1179                 }
1180
1181                 rc = init_smb3_11_server(conn);
1182                 if (rc < 0) {
1183                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1184                         kfree(conn->preauth_info);
1185                         conn->preauth_info = NULL;
1186                         goto err_out;
1187                 }
1188
1189                 ksmbd_gen_preauth_integrity_hash(conn,
1190                                                  work->request_buf,
1191                                                  conn->preauth_info->Preauth_HashValue);
1192                 rsp->NegotiateContextOffset =
1193                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1194                 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1195                 break;
1196         case SMB302_PROT_ID:
1197                 init_smb3_02_server(conn);
1198                 break;
1199         case SMB30_PROT_ID:
1200                 init_smb3_0_server(conn);
1201                 break;
1202         case SMB21_PROT_ID:
1203                 init_smb2_1_server(conn);
1204                 break;
1205         case SMB2X_PROT_ID:
1206         case BAD_PROT_ID:
1207         default:
1208                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1209                             conn->dialect);
1210                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1211                 rc = -EINVAL;
1212                 goto err_out;
1213         }
1214         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1215
1216         /* For stats */
1217         conn->connection_type = conn->dialect;
1218
1219         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1220         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1221         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1222
1223         memcpy(conn->ClientGUID, req->ClientGUID,
1224                         SMB2_CLIENT_GUID_SIZE);
1225         conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1226
1227         rsp->StructureSize = cpu_to_le16(65);
1228         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1229         /* Not setting conn guid rsp->ServerGUID, as it
1230          * not used by client for identifying server
1231          */
1232         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1233
1234         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1235         rsp->ServerStartTime = 0;
1236         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1237                     le32_to_cpu(rsp->NegotiateContextOffset),
1238                     le16_to_cpu(rsp->NegotiateContextCount));
1239
1240         rsp->SecurityBufferOffset = cpu_to_le16(128);
1241         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1242         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1243                                   le16_to_cpu(rsp->SecurityBufferOffset));
1244
1245         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1246         conn->use_spnego = true;
1247
1248         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1249              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1250             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1251                 conn->sign = true;
1252         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1253                 server_conf.enforced_signing = true;
1254                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1255                 conn->sign = true;
1256         }
1257
1258         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1259         ksmbd_conn_set_need_negotiate(conn);
1260
1261 err_out:
1262         if (rc)
1263                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1264
1265         if (!rc)
1266                 rc = ksmbd_iov_pin_rsp(work, rsp,
1267                                        sizeof(struct smb2_negotiate_rsp) +
1268                                         AUTH_GSS_LENGTH + neg_ctxt_len);
1269         if (rc < 0)
1270                 smb2_set_err_rsp(work);
1271         return rc;
1272 }
1273
1274 static int alloc_preauth_hash(struct ksmbd_session *sess,
1275                               struct ksmbd_conn *conn)
1276 {
1277         if (sess->Preauth_HashValue)
1278                 return 0;
1279
1280         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1281                                           PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1282         if (!sess->Preauth_HashValue)
1283                 return -ENOMEM;
1284
1285         return 0;
1286 }
1287
1288 static int generate_preauth_hash(struct ksmbd_work *work)
1289 {
1290         struct ksmbd_conn *conn = work->conn;
1291         struct ksmbd_session *sess = work->sess;
1292         u8 *preauth_hash;
1293
1294         if (conn->dialect != SMB311_PROT_ID)
1295                 return 0;
1296
1297         if (conn->binding) {
1298                 struct preauth_session *preauth_sess;
1299
1300                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1301                 if (!preauth_sess) {
1302                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1303                         if (!preauth_sess)
1304                                 return -ENOMEM;
1305                 }
1306
1307                 preauth_hash = preauth_sess->Preauth_HashValue;
1308         } else {
1309                 if (!sess->Preauth_HashValue)
1310                         if (alloc_preauth_hash(sess, conn))
1311                                 return -ENOMEM;
1312                 preauth_hash = sess->Preauth_HashValue;
1313         }
1314
1315         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1316         return 0;
1317 }
1318
1319 static int decode_negotiation_token(struct ksmbd_conn *conn,
1320                                     struct negotiate_message *negblob,
1321                                     size_t sz)
1322 {
1323         if (!conn->use_spnego)
1324                 return -EINVAL;
1325
1326         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1327                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1328                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1329                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1330                         conn->use_spnego = false;
1331                 }
1332         }
1333         return 0;
1334 }
1335
1336 static int ntlm_negotiate(struct ksmbd_work *work,
1337                           struct negotiate_message *negblob,
1338                           size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1339 {
1340         struct challenge_message *chgblob;
1341         unsigned char *spnego_blob = NULL;
1342         u16 spnego_blob_len;
1343         char *neg_blob;
1344         int sz, rc;
1345
1346         ksmbd_debug(SMB, "negotiate phase\n");
1347         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1348         if (rc)
1349                 return rc;
1350
1351         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1352         chgblob =
1353                 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1354         memset(chgblob, 0, sizeof(struct challenge_message));
1355
1356         if (!work->conn->use_spnego) {
1357                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1358                 if (sz < 0)
1359                         return -ENOMEM;
1360
1361                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1362                 return 0;
1363         }
1364
1365         sz = sizeof(struct challenge_message);
1366         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1367
1368         neg_blob = kzalloc(sz, GFP_KERNEL);
1369         if (!neg_blob)
1370                 return -ENOMEM;
1371
1372         chgblob = (struct challenge_message *)neg_blob;
1373         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1374         if (sz < 0) {
1375                 rc = -ENOMEM;
1376                 goto out;
1377         }
1378
1379         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1380                                            neg_blob, sz);
1381         if (rc) {
1382                 rc = -ENOMEM;
1383                 goto out;
1384         }
1385
1386         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1387         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1388         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1389
1390 out:
1391         kfree(spnego_blob);
1392         kfree(neg_blob);
1393         return rc;
1394 }
1395
1396 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1397                                                   struct smb2_sess_setup_req *req)
1398 {
1399         int sz;
1400
1401         if (conn->use_spnego && conn->mechToken)
1402                 return (struct authenticate_message *)conn->mechToken;
1403
1404         sz = le16_to_cpu(req->SecurityBufferOffset);
1405         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1406                                                + sz);
1407 }
1408
1409 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1410                                        struct smb2_sess_setup_req *req)
1411 {
1412         struct authenticate_message *authblob;
1413         struct ksmbd_user *user;
1414         char *name;
1415         unsigned int name_off, name_len, secbuf_len;
1416
1417         if (conn->use_spnego && conn->mechToken)
1418                 secbuf_len = conn->mechTokenLen;
1419         else
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                 if (conn->use_spnego && conn->mechToken)
1512                         sz = conn->mechTokenLen;
1513                 else
1514                         sz = le16_to_cpu(req->SecurityBufferLength);
1515                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1516                 if (rc) {
1517                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1518                         ksmbd_debug(SMB, "authentication failed\n");
1519                         return -EPERM;
1520                 }
1521         }
1522
1523         /*
1524          * If session state is SMB2_SESSION_VALID, We can assume
1525          * that it is reauthentication. And the user/password
1526          * has been verified, so return it here.
1527          */
1528         if (sess->state == SMB2_SESSION_VALID) {
1529                 if (conn->binding)
1530                         goto binding_session;
1531                 return 0;
1532         }
1533
1534         if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1535              (conn->sign || server_conf.enforced_signing)) ||
1536             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1537                 sess->sign = true;
1538
1539         if (smb3_encryption_negotiated(conn) &&
1540                         !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1541                 rc = conn->ops->generate_encryptionkey(conn, sess);
1542                 if (rc) {
1543                         ksmbd_debug(SMB,
1544                                         "SMB3 encryption key generation failed\n");
1545                         return -EINVAL;
1546                 }
1547                 sess->enc = true;
1548                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1549                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1550                 /*
1551                  * signing is disable if encryption is enable
1552                  * on this session
1553                  */
1554                 sess->sign = false;
1555         }
1556
1557 binding_session:
1558         if (conn->dialect >= SMB30_PROT_ID) {
1559                 chann = lookup_chann_list(sess, conn);
1560                 if (!chann) {
1561                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1562                         if (!chann)
1563                                 return -ENOMEM;
1564
1565                         chann->conn = conn;
1566                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1567                 }
1568         }
1569
1570         if (conn->ops->generate_signingkey) {
1571                 rc = conn->ops->generate_signingkey(sess, conn);
1572                 if (rc) {
1573                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1574                         return -EINVAL;
1575                 }
1576         }
1577
1578         if (!ksmbd_conn_lookup_dialect(conn)) {
1579                 pr_err("fail to verify the dialect\n");
1580                 return -ENOENT;
1581         }
1582         return 0;
1583 }
1584
1585 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1586 static int krb5_authenticate(struct ksmbd_work *work,
1587                              struct smb2_sess_setup_req *req,
1588                              struct smb2_sess_setup_rsp *rsp)
1589 {
1590         struct ksmbd_conn *conn = work->conn;
1591         struct ksmbd_session *sess = work->sess;
1592         char *in_blob, *out_blob;
1593         struct channel *chann = NULL;
1594         u64 prev_sess_id;
1595         int in_len, out_len;
1596         int retval;
1597
1598         in_blob = (char *)&req->hdr.ProtocolId +
1599                 le16_to_cpu(req->SecurityBufferOffset);
1600         in_len = le16_to_cpu(req->SecurityBufferLength);
1601         out_blob = (char *)&rsp->hdr.ProtocolId +
1602                 le16_to_cpu(rsp->SecurityBufferOffset);
1603         out_len = work->response_sz -
1604                 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1605
1606         /* Check previous session */
1607         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1608         if (prev_sess_id && prev_sess_id != sess->id)
1609                 destroy_previous_session(conn, sess->user, prev_sess_id);
1610
1611         if (sess->state == SMB2_SESSION_VALID)
1612                 ksmbd_free_user(sess->user);
1613
1614         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1615                                          out_blob, &out_len);
1616         if (retval) {
1617                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1618                 return -EINVAL;
1619         }
1620         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1621
1622         if ((conn->sign || server_conf.enforced_signing) ||
1623             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1624                 sess->sign = true;
1625
1626         if (smb3_encryption_negotiated(conn)) {
1627                 retval = conn->ops->generate_encryptionkey(conn, sess);
1628                 if (retval) {
1629                         ksmbd_debug(SMB,
1630                                     "SMB3 encryption key generation failed\n");
1631                         return -EINVAL;
1632                 }
1633                 sess->enc = true;
1634                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1635                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1636                 sess->sign = false;
1637         }
1638
1639         if (conn->dialect >= SMB30_PROT_ID) {
1640                 chann = lookup_chann_list(sess, conn);
1641                 if (!chann) {
1642                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1643                         if (!chann)
1644                                 return -ENOMEM;
1645
1646                         chann->conn = conn;
1647                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1648                 }
1649         }
1650
1651         if (conn->ops->generate_signingkey) {
1652                 retval = conn->ops->generate_signingkey(sess, conn);
1653                 if (retval) {
1654                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1655                         return -EINVAL;
1656                 }
1657         }
1658
1659         if (!ksmbd_conn_lookup_dialect(conn)) {
1660                 pr_err("fail to verify the dialect\n");
1661                 return -ENOENT;
1662         }
1663         return 0;
1664 }
1665 #else
1666 static int krb5_authenticate(struct ksmbd_work *work,
1667                              struct smb2_sess_setup_req *req,
1668                              struct smb2_sess_setup_rsp *rsp)
1669 {
1670         return -EOPNOTSUPP;
1671 }
1672 #endif
1673
1674 int smb2_sess_setup(struct ksmbd_work *work)
1675 {
1676         struct ksmbd_conn *conn = work->conn;
1677         struct smb2_sess_setup_req *req;
1678         struct smb2_sess_setup_rsp *rsp;
1679         struct ksmbd_session *sess;
1680         struct negotiate_message *negblob;
1681         unsigned int negblob_len, negblob_off;
1682         int rc = 0;
1683
1684         ksmbd_debug(SMB, "Received request for session setup\n");
1685
1686         WORK_BUFFERS(work, req, rsp);
1687
1688         rsp->StructureSize = cpu_to_le16(9);
1689         rsp->SessionFlags = 0;
1690         rsp->SecurityBufferOffset = cpu_to_le16(72);
1691         rsp->SecurityBufferLength = 0;
1692
1693         ksmbd_conn_lock(conn);
1694         if (!req->hdr.SessionId) {
1695                 sess = ksmbd_smb2_session_create();
1696                 if (!sess) {
1697                         rc = -ENOMEM;
1698                         goto out_err;
1699                 }
1700                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1701                 rc = ksmbd_session_register(conn, sess);
1702                 if (rc)
1703                         goto out_err;
1704         } else if (conn->dialect >= SMB30_PROT_ID &&
1705                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1706                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1707                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1708
1709                 sess = ksmbd_session_lookup_slowpath(sess_id);
1710                 if (!sess) {
1711                         rc = -ENOENT;
1712                         goto out_err;
1713                 }
1714
1715                 if (conn->dialect != sess->dialect) {
1716                         rc = -EINVAL;
1717                         goto out_err;
1718                 }
1719
1720                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1721                         rc = -EINVAL;
1722                         goto out_err;
1723                 }
1724
1725                 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1726                             SMB2_CLIENT_GUID_SIZE)) {
1727                         rc = -ENOENT;
1728                         goto out_err;
1729                 }
1730
1731                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1732                         rc = -EACCES;
1733                         goto out_err;
1734                 }
1735
1736                 if (sess->state == SMB2_SESSION_EXPIRED) {
1737                         rc = -EFAULT;
1738                         goto out_err;
1739                 }
1740
1741                 if (ksmbd_conn_need_reconnect(conn)) {
1742                         rc = -EFAULT;
1743                         sess = NULL;
1744                         goto out_err;
1745                 }
1746
1747                 if (ksmbd_session_lookup(conn, sess_id)) {
1748                         rc = -EACCES;
1749                         goto out_err;
1750                 }
1751
1752                 if (user_guest(sess->user)) {
1753                         rc = -EOPNOTSUPP;
1754                         goto out_err;
1755                 }
1756
1757                 conn->binding = true;
1758         } else if ((conn->dialect < SMB30_PROT_ID ||
1759                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1760                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1761                 sess = NULL;
1762                 rc = -EACCES;
1763                 goto out_err;
1764         } else {
1765                 sess = ksmbd_session_lookup(conn,
1766                                             le64_to_cpu(req->hdr.SessionId));
1767                 if (!sess) {
1768                         rc = -ENOENT;
1769                         goto out_err;
1770                 }
1771
1772                 if (sess->state == SMB2_SESSION_EXPIRED) {
1773                         rc = -EFAULT;
1774                         goto out_err;
1775                 }
1776
1777                 if (ksmbd_conn_need_reconnect(conn)) {
1778                         rc = -EFAULT;
1779                         sess = NULL;
1780                         goto out_err;
1781                 }
1782         }
1783         work->sess = sess;
1784
1785         negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1786         negblob_len = le16_to_cpu(req->SecurityBufferLength);
1787         if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
1788                 rc = -EINVAL;
1789                 goto out_err;
1790         }
1791
1792         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1793                         negblob_off);
1794
1795         if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1796                 if (conn->mechToken) {
1797                         negblob = (struct negotiate_message *)conn->mechToken;
1798                         negblob_len = conn->mechTokenLen;
1799                 }
1800         }
1801
1802         if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1803                 rc = -EINVAL;
1804                 goto out_err;
1805         }
1806
1807         if (server_conf.auth_mechs & conn->auth_mechs) {
1808                 rc = generate_preauth_hash(work);
1809                 if (rc)
1810                         goto out_err;
1811
1812                 if (conn->preferred_auth_mech &
1813                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1814                         rc = krb5_authenticate(work, req, rsp);
1815                         if (rc) {
1816                                 rc = -EINVAL;
1817                                 goto out_err;
1818                         }
1819
1820                         if (!ksmbd_conn_need_reconnect(conn)) {
1821                                 ksmbd_conn_set_good(conn);
1822                                 sess->state = SMB2_SESSION_VALID;
1823                         }
1824                         kfree(sess->Preauth_HashValue);
1825                         sess->Preauth_HashValue = NULL;
1826                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1827                         if (negblob->MessageType == NtLmNegotiate) {
1828                                 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1829                                 if (rc)
1830                                         goto out_err;
1831                                 rsp->hdr.Status =
1832                                         STATUS_MORE_PROCESSING_REQUIRED;
1833                         } else if (negblob->MessageType == NtLmAuthenticate) {
1834                                 rc = ntlm_authenticate(work, req, rsp);
1835                                 if (rc)
1836                                         goto out_err;
1837
1838                                 if (!ksmbd_conn_need_reconnect(conn)) {
1839                                         ksmbd_conn_set_good(conn);
1840                                         sess->state = SMB2_SESSION_VALID;
1841                                 }
1842                                 if (conn->binding) {
1843                                         struct preauth_session *preauth_sess;
1844
1845                                         preauth_sess =
1846                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1847                                         if (preauth_sess) {
1848                                                 list_del(&preauth_sess->preauth_entry);
1849                                                 kfree(preauth_sess);
1850                                         }
1851                                 }
1852                                 kfree(sess->Preauth_HashValue);
1853                                 sess->Preauth_HashValue = NULL;
1854                         } else {
1855                                 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1856                                                 le32_to_cpu(negblob->MessageType));
1857                                 rc = -EINVAL;
1858                         }
1859                 } else {
1860                         /* TODO: need one more negotiation */
1861                         pr_err("Not support the preferred authentication\n");
1862                         rc = -EINVAL;
1863                 }
1864         } else {
1865                 pr_err("Not support authentication\n");
1866                 rc = -EINVAL;
1867         }
1868
1869 out_err:
1870         if (rc == -EINVAL)
1871                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1872         else if (rc == -ENOENT)
1873                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1874         else if (rc == -EACCES)
1875                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1876         else if (rc == -EFAULT)
1877                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1878         else if (rc == -ENOMEM)
1879                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1880         else if (rc == -EOPNOTSUPP)
1881                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1882         else if (rc)
1883                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1884
1885         if (conn->use_spnego && conn->mechToken) {
1886                 kfree(conn->mechToken);
1887                 conn->mechToken = NULL;
1888         }
1889
1890         if (rc < 0) {
1891                 /*
1892                  * SecurityBufferOffset should be set to zero
1893                  * in session setup error response.
1894                  */
1895                 rsp->SecurityBufferOffset = 0;
1896
1897                 if (sess) {
1898                         bool try_delay = false;
1899
1900                         /*
1901                          * To avoid dictionary attacks (repeated session setups rapidly sent) to
1902                          * connect to server, ksmbd make a delay of a 5 seconds on session setup
1903                          * failure to make it harder to send enough random connection requests
1904                          * to break into a server.
1905                          */
1906                         if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1907                                 try_delay = true;
1908
1909                         sess->last_active = jiffies;
1910                         sess->state = SMB2_SESSION_EXPIRED;
1911                         if (try_delay) {
1912                                 ksmbd_conn_set_need_reconnect(conn);
1913                                 ssleep(5);
1914                                 ksmbd_conn_set_need_negotiate(conn);
1915                         }
1916                 }
1917                 smb2_set_err_rsp(work);
1918         } else {
1919                 unsigned int iov_len;
1920
1921                 if (rsp->SecurityBufferLength)
1922                         iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1923                                 le16_to_cpu(rsp->SecurityBufferLength);
1924                 else
1925                         iov_len = sizeof(struct smb2_sess_setup_rsp);
1926                 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1927                 if (rc)
1928                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1929         }
1930
1931         ksmbd_conn_unlock(conn);
1932         return rc;
1933 }
1934
1935 /**
1936  * smb2_tree_connect() - handler for smb2 tree connect command
1937  * @work:       smb work containing smb request buffer
1938  *
1939  * Return:      0 on success, otherwise error
1940  */
1941 int smb2_tree_connect(struct ksmbd_work *work)
1942 {
1943         struct ksmbd_conn *conn = work->conn;
1944         struct smb2_tree_connect_req *req;
1945         struct smb2_tree_connect_rsp *rsp;
1946         struct ksmbd_session *sess = work->sess;
1947         char *treename = NULL, *name = NULL;
1948         struct ksmbd_tree_conn_status status;
1949         struct ksmbd_share_config *share;
1950         int rc = -EINVAL;
1951
1952         WORK_BUFFERS(work, req, rsp);
1953
1954         treename = smb_strndup_from_utf16(req->Buffer,
1955                                           le16_to_cpu(req->PathLength), true,
1956                                           conn->local_nls);
1957         if (IS_ERR(treename)) {
1958                 pr_err("treename is NULL\n");
1959                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1960                 goto out_err1;
1961         }
1962
1963         name = ksmbd_extract_sharename(conn->um, treename);
1964         if (IS_ERR(name)) {
1965                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1966                 goto out_err1;
1967         }
1968
1969         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1970                     name, treename);
1971
1972         status = ksmbd_tree_conn_connect(conn, sess, name);
1973         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1974                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1975         else
1976                 goto out_err1;
1977
1978         share = status.tree_conn->share_conf;
1979         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1980                 ksmbd_debug(SMB, "IPC share path request\n");
1981                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1982                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1983                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1984                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1985                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1986                         FILE_SYNCHRONIZE_LE;
1987         } else {
1988                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1989                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1990                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1991                 if (test_tree_conn_flag(status.tree_conn,
1992                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1993                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1994                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1995                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1996                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1997                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1998                                 FILE_SYNCHRONIZE_LE;
1999                 }
2000         }
2001
2002         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
2003         if (conn->posix_ext_supported)
2004                 status.tree_conn->posix_extensions = true;
2005
2006         write_lock(&sess->tree_conns_lock);
2007         status.tree_conn->t_state = TREE_CONNECTED;
2008         write_unlock(&sess->tree_conns_lock);
2009         rsp->StructureSize = cpu_to_le16(16);
2010 out_err1:
2011         rsp->Capabilities = 0;
2012         rsp->Reserved = 0;
2013         /* default manual caching */
2014         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2015
2016         rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2017         if (rc)
2018                 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2019
2020         if (!IS_ERR(treename))
2021                 kfree(treename);
2022         if (!IS_ERR(name))
2023                 kfree(name);
2024
2025         switch (status.ret) {
2026         case KSMBD_TREE_CONN_STATUS_OK:
2027                 rsp->hdr.Status = STATUS_SUCCESS;
2028                 rc = 0;
2029                 break;
2030         case -ESTALE:
2031         case -ENOENT:
2032         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2033                 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2034                 break;
2035         case -ENOMEM:
2036         case KSMBD_TREE_CONN_STATUS_NOMEM:
2037                 rsp->hdr.Status = STATUS_NO_MEMORY;
2038                 break;
2039         case KSMBD_TREE_CONN_STATUS_ERROR:
2040         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2041         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2042                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2043                 break;
2044         case -EINVAL:
2045                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2046                 break;
2047         default:
2048                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2049         }
2050
2051         if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2052                 smb2_set_err_rsp(work);
2053
2054         return rc;
2055 }
2056
2057 /**
2058  * smb2_create_open_flags() - convert smb open flags to unix open flags
2059  * @file_present:       is file already present
2060  * @access:             file access flags
2061  * @disposition:        file disposition flags
2062  * @may_flags:          set with MAY_ flags
2063  *
2064  * Return:      file open flags
2065  */
2066 static int smb2_create_open_flags(bool file_present, __le32 access,
2067                                   __le32 disposition,
2068                                   int *may_flags)
2069 {
2070         int oflags = O_NONBLOCK | O_LARGEFILE;
2071
2072         if (access & FILE_READ_DESIRED_ACCESS_LE &&
2073             access & FILE_WRITE_DESIRE_ACCESS_LE) {
2074                 oflags |= O_RDWR;
2075                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2076         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2077                 oflags |= O_WRONLY;
2078                 *may_flags = MAY_OPEN | MAY_WRITE;
2079         } else {
2080                 oflags |= O_RDONLY;
2081                 *may_flags = MAY_OPEN | MAY_READ;
2082         }
2083
2084         if (access == FILE_READ_ATTRIBUTES_LE)
2085                 oflags |= O_PATH;
2086
2087         if (file_present) {
2088                 switch (disposition & FILE_CREATE_MASK_LE) {
2089                 case FILE_OPEN_LE:
2090                 case FILE_CREATE_LE:
2091                         break;
2092                 case FILE_SUPERSEDE_LE:
2093                 case FILE_OVERWRITE_LE:
2094                 case FILE_OVERWRITE_IF_LE:
2095                         oflags |= O_TRUNC;
2096                         break;
2097                 default:
2098                         break;
2099                 }
2100         } else {
2101                 switch (disposition & FILE_CREATE_MASK_LE) {
2102                 case FILE_SUPERSEDE_LE:
2103                 case FILE_CREATE_LE:
2104                 case FILE_OPEN_IF_LE:
2105                 case FILE_OVERWRITE_IF_LE:
2106                         oflags |= O_CREAT;
2107                         break;
2108                 case FILE_OPEN_LE:
2109                 case FILE_OVERWRITE_LE:
2110                         oflags &= ~O_CREAT;
2111                         break;
2112                 default:
2113                         break;
2114                 }
2115         }
2116
2117         return oflags;
2118 }
2119
2120 /**
2121  * smb2_tree_disconnect() - handler for smb tree connect request
2122  * @work:       smb work containing request buffer
2123  *
2124  * Return:      0
2125  */
2126 int smb2_tree_disconnect(struct ksmbd_work *work)
2127 {
2128         struct smb2_tree_disconnect_rsp *rsp;
2129         struct smb2_tree_disconnect_req *req;
2130         struct ksmbd_session *sess = work->sess;
2131         struct ksmbd_tree_connect *tcon = work->tcon;
2132         int err;
2133
2134         WORK_BUFFERS(work, req, rsp);
2135
2136         ksmbd_debug(SMB, "request\n");
2137
2138         if (!tcon) {
2139                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2140
2141                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2142                 err = -ENOENT;
2143                 goto err_out;
2144         }
2145
2146         ksmbd_close_tree_conn_fds(work);
2147
2148         write_lock(&sess->tree_conns_lock);
2149         if (tcon->t_state == TREE_DISCONNECTED) {
2150                 write_unlock(&sess->tree_conns_lock);
2151                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2152                 err = -ENOENT;
2153                 goto err_out;
2154         }
2155
2156         WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2157         tcon->t_state = TREE_DISCONNECTED;
2158         write_unlock(&sess->tree_conns_lock);
2159
2160         err = ksmbd_tree_conn_disconnect(sess, tcon);
2161         if (err) {
2162                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2163                 goto err_out;
2164         }
2165
2166         work->tcon = NULL;
2167
2168         rsp->StructureSize = cpu_to_le16(4);
2169         err = ksmbd_iov_pin_rsp(work, rsp,
2170                                 sizeof(struct smb2_tree_disconnect_rsp));
2171         if (err) {
2172                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2173                 goto err_out;
2174         }
2175
2176         return 0;
2177
2178 err_out:
2179         smb2_set_err_rsp(work);
2180         return err;
2181
2182 }
2183
2184 /**
2185  * smb2_session_logoff() - handler for session log off request
2186  * @work:       smb work containing request buffer
2187  *
2188  * Return:      0
2189  */
2190 int smb2_session_logoff(struct ksmbd_work *work)
2191 {
2192         struct ksmbd_conn *conn = work->conn;
2193         struct smb2_logoff_req *req;
2194         struct smb2_logoff_rsp *rsp;
2195         struct ksmbd_session *sess;
2196         u64 sess_id;
2197         int err;
2198
2199         WORK_BUFFERS(work, req, rsp);
2200
2201         ksmbd_debug(SMB, "request\n");
2202
2203         ksmbd_conn_lock(conn);
2204         if (!ksmbd_conn_good(conn)) {
2205                 ksmbd_conn_unlock(conn);
2206                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2207                 smb2_set_err_rsp(work);
2208                 return -ENOENT;
2209         }
2210         sess_id = le64_to_cpu(req->hdr.SessionId);
2211         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2212         ksmbd_conn_unlock(conn);
2213
2214         ksmbd_close_session_fds(work);
2215         ksmbd_conn_wait_idle(conn, sess_id);
2216
2217         /*
2218          * Re-lookup session to validate if session is deleted
2219          * while waiting request complete
2220          */
2221         sess = ksmbd_session_lookup_all(conn, sess_id);
2222         if (ksmbd_tree_conn_session_logoff(sess)) {
2223                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2224                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2225                 smb2_set_err_rsp(work);
2226                 return -ENOENT;
2227         }
2228
2229         ksmbd_destroy_file_table(&sess->file_table);
2230         sess->state = SMB2_SESSION_EXPIRED;
2231
2232         ksmbd_free_user(sess->user);
2233         sess->user = NULL;
2234         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2235
2236         rsp->StructureSize = cpu_to_le16(4);
2237         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2238         if (err) {
2239                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2240                 smb2_set_err_rsp(work);
2241                 return err;
2242         }
2243         return 0;
2244 }
2245
2246 /**
2247  * create_smb2_pipe() - create IPC pipe
2248  * @work:       smb work containing request buffer
2249  *
2250  * Return:      0 on success, otherwise error
2251  */
2252 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2253 {
2254         struct smb2_create_rsp *rsp;
2255         struct smb2_create_req *req;
2256         int id;
2257         int err;
2258         char *name;
2259
2260         WORK_BUFFERS(work, req, rsp);
2261
2262         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2263                                       1, work->conn->local_nls);
2264         if (IS_ERR(name)) {
2265                 rsp->hdr.Status = STATUS_NO_MEMORY;
2266                 err = PTR_ERR(name);
2267                 goto out;
2268         }
2269
2270         id = ksmbd_session_rpc_open(work->sess, name);
2271         if (id < 0) {
2272                 pr_err("Unable to open RPC pipe: %d\n", id);
2273                 err = id;
2274                 goto out;
2275         }
2276
2277         rsp->hdr.Status = STATUS_SUCCESS;
2278         rsp->StructureSize = cpu_to_le16(89);
2279         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2280         rsp->Flags = 0;
2281         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2282
2283         rsp->CreationTime = cpu_to_le64(0);
2284         rsp->LastAccessTime = cpu_to_le64(0);
2285         rsp->ChangeTime = cpu_to_le64(0);
2286         rsp->AllocationSize = cpu_to_le64(0);
2287         rsp->EndofFile = cpu_to_le64(0);
2288         rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2289         rsp->Reserved2 = 0;
2290         rsp->VolatileFileId = id;
2291         rsp->PersistentFileId = 0;
2292         rsp->CreateContextsOffset = 0;
2293         rsp->CreateContextsLength = 0;
2294
2295         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2296         if (err)
2297                 goto out;
2298
2299         kfree(name);
2300         return 0;
2301
2302 out:
2303         switch (err) {
2304         case -EINVAL:
2305                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2306                 break;
2307         case -ENOSPC:
2308         case -ENOMEM:
2309                 rsp->hdr.Status = STATUS_NO_MEMORY;
2310                 break;
2311         }
2312
2313         if (!IS_ERR(name))
2314                 kfree(name);
2315
2316         smb2_set_err_rsp(work);
2317         return err;
2318 }
2319
2320 /**
2321  * smb2_set_ea() - handler for setting extended attributes using set
2322  *              info command
2323  * @eabuf:      set info command buffer
2324  * @buf_len:    set info command buffer length
2325  * @path:       dentry path for get ea
2326  *
2327  * Return:      0 on success, otherwise error
2328  */
2329 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2330                        const struct path *path)
2331 {
2332         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2333         char *attr_name = NULL, *value;
2334         int rc = 0;
2335         unsigned int next = 0;
2336
2337         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2338                         le16_to_cpu(eabuf->EaValueLength))
2339                 return -EINVAL;
2340
2341         attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2342         if (!attr_name)
2343                 return -ENOMEM;
2344
2345         do {
2346                 if (!eabuf->EaNameLength)
2347                         goto next;
2348
2349                 ksmbd_debug(SMB,
2350                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2351                             eabuf->name, eabuf->EaNameLength,
2352                             le16_to_cpu(eabuf->EaValueLength),
2353                             le32_to_cpu(eabuf->NextEntryOffset));
2354
2355                 if (eabuf->EaNameLength >
2356                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2357                         rc = -EINVAL;
2358                         break;
2359                 }
2360
2361                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2362                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2363                        eabuf->EaNameLength);
2364                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2365                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2366
2367                 if (!eabuf->EaValueLength) {
2368                         rc = ksmbd_vfs_casexattr_len(idmap,
2369                                                      path->dentry,
2370                                                      attr_name,
2371                                                      XATTR_USER_PREFIX_LEN +
2372                                                      eabuf->EaNameLength);
2373
2374                         /* delete the EA only when it exits */
2375                         if (rc > 0) {
2376                                 rc = ksmbd_vfs_remove_xattr(idmap,
2377                                                             path,
2378                                                             attr_name);
2379
2380                                 if (rc < 0) {
2381                                         ksmbd_debug(SMB,
2382                                                     "remove xattr failed(%d)\n",
2383                                                     rc);
2384                                         break;
2385                                 }
2386                         }
2387
2388                         /* if the EA doesn't exist, just do nothing. */
2389                         rc = 0;
2390                 } else {
2391                         rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2392                                                 le16_to_cpu(eabuf->EaValueLength),
2393                                                 0, true);
2394                         if (rc < 0) {
2395                                 ksmbd_debug(SMB,
2396                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2397                                             rc);
2398                                 break;
2399                         }
2400                 }
2401
2402 next:
2403                 next = le32_to_cpu(eabuf->NextEntryOffset);
2404                 if (next == 0 || buf_len < next)
2405                         break;
2406                 buf_len -= next;
2407                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2408                 if (buf_len < sizeof(struct smb2_ea_info)) {
2409                         rc = -EINVAL;
2410                         break;
2411                 }
2412
2413                 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2414                                 le16_to_cpu(eabuf->EaValueLength)) {
2415                         rc = -EINVAL;
2416                         break;
2417                 }
2418         } while (next != 0);
2419
2420         kfree(attr_name);
2421         return rc;
2422 }
2423
2424 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2425                                                struct ksmbd_file *fp,
2426                                                char *stream_name, int s_type)
2427 {
2428         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2429         size_t xattr_stream_size;
2430         char *xattr_stream_name;
2431         int rc;
2432
2433         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2434                                          &xattr_stream_name,
2435                                          &xattr_stream_size,
2436                                          s_type);
2437         if (rc)
2438                 return rc;
2439
2440         fp->stream.name = xattr_stream_name;
2441         fp->stream.size = xattr_stream_size;
2442
2443         /* Check if there is stream prefix in xattr space */
2444         rc = ksmbd_vfs_casexattr_len(idmap,
2445                                      path->dentry,
2446                                      xattr_stream_name,
2447                                      xattr_stream_size);
2448         if (rc >= 0)
2449                 return 0;
2450
2451         if (fp->cdoption == FILE_OPEN_LE) {
2452                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2453                 return -EBADF;
2454         }
2455
2456         rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2457         if (rc < 0)
2458                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2459         return 0;
2460 }
2461
2462 static int smb2_remove_smb_xattrs(const struct path *path)
2463 {
2464         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2465         char *name, *xattr_list = NULL;
2466         ssize_t xattr_list_len;
2467         int err = 0;
2468
2469         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2470         if (xattr_list_len < 0) {
2471                 goto out;
2472         } else if (!xattr_list_len) {
2473                 ksmbd_debug(SMB, "empty xattr in the file\n");
2474                 goto out;
2475         }
2476
2477         for (name = xattr_list; name - xattr_list < xattr_list_len;
2478                         name += strlen(name) + 1) {
2479                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2480
2481                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2482                     !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2483                              STREAM_PREFIX_LEN)) {
2484                         err = ksmbd_vfs_remove_xattr(idmap, path,
2485                                                      name);
2486                         if (err)
2487                                 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2488                                             name);
2489                 }
2490         }
2491 out:
2492         kvfree(xattr_list);
2493         return err;
2494 }
2495
2496 static int smb2_create_truncate(const struct path *path)
2497 {
2498         int rc = vfs_truncate(path, 0);
2499
2500         if (rc) {
2501                 pr_err("vfs_truncate failed, rc %d\n", rc);
2502                 return rc;
2503         }
2504
2505         rc = smb2_remove_smb_xattrs(path);
2506         if (rc == -EOPNOTSUPP)
2507                 rc = 0;
2508         if (rc)
2509                 ksmbd_debug(SMB,
2510                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2511                             rc);
2512         return rc;
2513 }
2514
2515 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2516                             struct ksmbd_file *fp)
2517 {
2518         struct xattr_dos_attrib da = {0};
2519         int rc;
2520
2521         if (!test_share_config_flag(tcon->share_conf,
2522                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2523                 return;
2524
2525         da.version = 4;
2526         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2527         da.itime = da.create_time = fp->create_time;
2528         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2529                 XATTR_DOSINFO_ITIME;
2530
2531         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, false);
2532         if (rc)
2533                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2534 }
2535
2536 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2537                                const struct path *path, struct ksmbd_file *fp)
2538 {
2539         struct xattr_dos_attrib da;
2540         int rc;
2541
2542         fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2543
2544         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2545         if (!test_share_config_flag(tcon->share_conf,
2546                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2547                 return;
2548
2549         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2550                                             path->dentry, &da);
2551         if (rc > 0) {
2552                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2553                 fp->create_time = da.create_time;
2554                 fp->itime = da.itime;
2555         }
2556 }
2557
2558 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2559                       struct path *path, char *name, int open_flags,
2560                       umode_t posix_mode, bool is_dir)
2561 {
2562         struct ksmbd_tree_connect *tcon = work->tcon;
2563         struct ksmbd_share_config *share = tcon->share_conf;
2564         umode_t mode;
2565         int rc;
2566
2567         if (!(open_flags & O_CREAT))
2568                 return -EBADF;
2569
2570         ksmbd_debug(SMB, "file does not exist, so creating\n");
2571         if (is_dir == true) {
2572                 ksmbd_debug(SMB, "creating directory\n");
2573
2574                 mode = share_config_directory_mode(share, posix_mode);
2575                 rc = ksmbd_vfs_mkdir(work, name, mode);
2576                 if (rc)
2577                         return rc;
2578         } else {
2579                 ksmbd_debug(SMB, "creating regular file\n");
2580
2581                 mode = share_config_create_mode(share, posix_mode);
2582                 rc = ksmbd_vfs_create(work, name, mode);
2583                 if (rc)
2584                         return rc;
2585         }
2586
2587         rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2588         if (rc) {
2589                 pr_err("cannot get linux path (%s), err = %d\n",
2590                        name, rc);
2591                 return rc;
2592         }
2593         return 0;
2594 }
2595
2596 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2597                                  struct smb2_create_req *req,
2598                                  const struct path *path)
2599 {
2600         struct create_context *context;
2601         struct create_sd_buf_req *sd_buf;
2602
2603         if (!req->CreateContextsOffset)
2604                 return -ENOENT;
2605
2606         /* Parse SD BUFFER create contexts */
2607         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2608         if (!context)
2609                 return -ENOENT;
2610         else if (IS_ERR(context))
2611                 return PTR_ERR(context);
2612
2613         ksmbd_debug(SMB,
2614                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2615         sd_buf = (struct create_sd_buf_req *)context;
2616         if (le16_to_cpu(context->DataOffset) +
2617             le32_to_cpu(context->DataLength) <
2618             sizeof(struct create_sd_buf_req))
2619                 return -EINVAL;
2620         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2621                             le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2622 }
2623
2624 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2625                              struct mnt_idmap *idmap,
2626                              struct inode *inode)
2627 {
2628         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2629         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2630
2631         fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2632         fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2633         fattr->cf_mode = inode->i_mode;
2634         fattr->cf_acls = NULL;
2635         fattr->cf_dacls = NULL;
2636
2637         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2638                 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2639                 if (S_ISDIR(inode->i_mode))
2640                         fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2641         }
2642 }
2643
2644 /**
2645  * smb2_open() - handler for smb file open request
2646  * @work:       smb work containing request buffer
2647  *
2648  * Return:      0 on success, otherwise error
2649  */
2650 int smb2_open(struct ksmbd_work *work)
2651 {
2652         struct ksmbd_conn *conn = work->conn;
2653         struct ksmbd_session *sess = work->sess;
2654         struct ksmbd_tree_connect *tcon = work->tcon;
2655         struct smb2_create_req *req;
2656         struct smb2_create_rsp *rsp;
2657         struct path path, parent_path;
2658         struct ksmbd_share_config *share = tcon->share_conf;
2659         struct ksmbd_file *fp = NULL;
2660         struct file *filp = NULL;
2661         struct mnt_idmap *idmap = NULL;
2662         struct kstat stat;
2663         struct create_context *context;
2664         struct lease_ctx_info *lc = NULL;
2665         struct create_ea_buf_req *ea_buf = NULL;
2666         struct oplock_info *opinfo;
2667         __le32 *next_ptr = NULL;
2668         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2669         int rc = 0;
2670         int contxt_cnt = 0, query_disk_id = 0;
2671         int maximal_access_ctxt = 0, posix_ctxt = 0;
2672         int s_type = 0;
2673         int next_off = 0;
2674         char *name = NULL;
2675         char *stream_name = NULL;
2676         bool file_present = false, created = false, already_permitted = false;
2677         int share_ret, need_truncate = 0;
2678         u64 time;
2679         umode_t posix_mode = 0;
2680         __le32 daccess, maximal_access = 0;
2681         int iov_len = 0;
2682
2683         WORK_BUFFERS(work, req, rsp);
2684
2685         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2686             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2687                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2688                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2689                 smb2_set_err_rsp(work);
2690                 return -EINVAL;
2691         }
2692
2693         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2694                 ksmbd_debug(SMB, "IPC pipe create request\n");
2695                 return create_smb2_pipe(work);
2696         }
2697
2698         if (req->NameLength) {
2699                 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2700                     *(char *)req->Buffer == '\\') {
2701                         pr_err("not allow directory name included leading slash\n");
2702                         rc = -EINVAL;
2703                         goto err_out2;
2704                 }
2705
2706                 name = smb2_get_name(req->Buffer,
2707                                      le16_to_cpu(req->NameLength),
2708                                      work->conn->local_nls);
2709                 if (IS_ERR(name)) {
2710                         rc = PTR_ERR(name);
2711                         if (rc != -ENOMEM)
2712                                 rc = -ENOENT;
2713                         name = NULL;
2714                         goto err_out2;
2715                 }
2716
2717                 ksmbd_debug(SMB, "converted name = %s\n", name);
2718                 if (strchr(name, ':')) {
2719                         if (!test_share_config_flag(work->tcon->share_conf,
2720                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2721                                 rc = -EBADF;
2722                                 goto err_out2;
2723                         }
2724                         rc = parse_stream_name(name, &stream_name, &s_type);
2725                         if (rc < 0)
2726                                 goto err_out2;
2727                 }
2728
2729                 rc = ksmbd_validate_filename(name);
2730                 if (rc < 0)
2731                         goto err_out2;
2732
2733                 if (ksmbd_share_veto_filename(share, name)) {
2734                         rc = -ENOENT;
2735                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2736                                     name);
2737                         goto err_out2;
2738                 }
2739         } else {
2740                 name = kstrdup("", GFP_KERNEL);
2741                 if (!name) {
2742                         rc = -ENOMEM;
2743                         goto err_out2;
2744                 }
2745         }
2746
2747         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2748                 pr_err("Invalid impersonationlevel : 0x%x\n",
2749                        le32_to_cpu(req->ImpersonationLevel));
2750                 rc = -EIO;
2751                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2752                 goto err_out2;
2753         }
2754
2755         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2756                 pr_err("Invalid create options : 0x%x\n",
2757                        le32_to_cpu(req->CreateOptions));
2758                 rc = -EINVAL;
2759                 goto err_out2;
2760         } else {
2761                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2762                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2763                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2764
2765                 if (req->CreateOptions &
2766                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2767                      FILE_RESERVE_OPFILTER_LE)) {
2768                         rc = -EOPNOTSUPP;
2769                         goto err_out2;
2770                 }
2771
2772                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2773                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2774                                 rc = -EINVAL;
2775                                 goto err_out2;
2776                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2777                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2778                         }
2779                 }
2780         }
2781
2782         if (le32_to_cpu(req->CreateDisposition) >
2783             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2784                 pr_err("Invalid create disposition : 0x%x\n",
2785                        le32_to_cpu(req->CreateDisposition));
2786                 rc = -EINVAL;
2787                 goto err_out2;
2788         }
2789
2790         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2791                 pr_err("Invalid desired access : 0x%x\n",
2792                        le32_to_cpu(req->DesiredAccess));
2793                 rc = -EACCES;
2794                 goto err_out2;
2795         }
2796
2797         if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2798                 pr_err("Invalid file attribute : 0x%x\n",
2799                        le32_to_cpu(req->FileAttributes));
2800                 rc = -EINVAL;
2801                 goto err_out2;
2802         }
2803
2804         if (req->CreateContextsOffset) {
2805                 /* Parse non-durable handle create contexts */
2806                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
2807                 if (IS_ERR(context)) {
2808                         rc = PTR_ERR(context);
2809                         goto err_out2;
2810                 } else if (context) {
2811                         ea_buf = (struct create_ea_buf_req *)context;
2812                         if (le16_to_cpu(context->DataOffset) +
2813                             le32_to_cpu(context->DataLength) <
2814                             sizeof(struct create_ea_buf_req)) {
2815                                 rc = -EINVAL;
2816                                 goto err_out2;
2817                         }
2818                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2819                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2820                                 rc = -EACCES;
2821                                 goto err_out2;
2822                         }
2823                 }
2824
2825                 context = smb2_find_context_vals(req,
2826                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
2827                 if (IS_ERR(context)) {
2828                         rc = PTR_ERR(context);
2829                         goto err_out2;
2830                 } else if (context) {
2831                         ksmbd_debug(SMB,
2832                                     "get query maximal access context\n");
2833                         maximal_access_ctxt = 1;
2834                 }
2835
2836                 context = smb2_find_context_vals(req,
2837                                                  SMB2_CREATE_TIMEWARP_REQUEST, 4);
2838                 if (IS_ERR(context)) {
2839                         rc = PTR_ERR(context);
2840                         goto err_out2;
2841                 } else if (context) {
2842                         ksmbd_debug(SMB, "get timewarp context\n");
2843                         rc = -EBADF;
2844                         goto err_out2;
2845                 }
2846
2847                 if (tcon->posix_extensions) {
2848                         context = smb2_find_context_vals(req,
2849                                                          SMB2_CREATE_TAG_POSIX, 16);
2850                         if (IS_ERR(context)) {
2851                                 rc = PTR_ERR(context);
2852                                 goto err_out2;
2853                         } else if (context) {
2854                                 struct create_posix *posix =
2855                                         (struct create_posix *)context;
2856                                 if (le16_to_cpu(context->DataOffset) +
2857                                     le32_to_cpu(context->DataLength) <
2858                                     sizeof(struct create_posix) - 4) {
2859                                         rc = -EINVAL;
2860                                         goto err_out2;
2861                                 }
2862                                 ksmbd_debug(SMB, "get posix context\n");
2863
2864                                 posix_mode = le32_to_cpu(posix->Mode);
2865                                 posix_ctxt = 1;
2866                         }
2867                 }
2868         }
2869
2870         if (ksmbd_override_fsids(work)) {
2871                 rc = -ENOMEM;
2872                 goto err_out2;
2873         }
2874
2875         rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
2876                                         &parent_path, &path, 1);
2877         if (!rc) {
2878                 file_present = true;
2879
2880                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2881                         /*
2882                          * If file exists with under flags, return access
2883                          * denied error.
2884                          */
2885                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2886                             req->CreateDisposition == FILE_OPEN_IF_LE) {
2887                                 rc = -EACCES;
2888                                 goto err_out;
2889                         }
2890
2891                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2892                                 ksmbd_debug(SMB,
2893                                             "User does not have write permission\n");
2894                                 rc = -EACCES;
2895                                 goto err_out;
2896                         }
2897                 } else if (d_is_symlink(path.dentry)) {
2898                         rc = -EACCES;
2899                         goto err_out;
2900                 }
2901
2902                 file_present = true;
2903                 idmap = mnt_idmap(path.mnt);
2904         } else {
2905                 if (rc != -ENOENT)
2906                         goto err_out;
2907                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2908                             name, rc);
2909                 rc = 0;
2910         }
2911
2912         if (stream_name) {
2913                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2914                         if (s_type == DATA_STREAM) {
2915                                 rc = -EIO;
2916                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2917                         }
2918                 } else {
2919                         if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
2920                             s_type == DATA_STREAM) {
2921                                 rc = -EIO;
2922                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2923                         }
2924                 }
2925
2926                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2927                     req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2928                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2929                         rc = -EIO;
2930                 }
2931
2932                 if (rc < 0)
2933                         goto err_out;
2934         }
2935
2936         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2937             S_ISDIR(d_inode(path.dentry)->i_mode) &&
2938             !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2939                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2940                             name, req->CreateOptions);
2941                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2942                 rc = -EIO;
2943                 goto err_out;
2944         }
2945
2946         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2947             !(req->CreateDisposition == FILE_CREATE_LE) &&
2948             !S_ISDIR(d_inode(path.dentry)->i_mode)) {
2949                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2950                 rc = -EIO;
2951                 goto err_out;
2952         }
2953
2954         if (!stream_name && file_present &&
2955             req->CreateDisposition == FILE_CREATE_LE) {
2956                 rc = -EEXIST;
2957                 goto err_out;
2958         }
2959
2960         daccess = smb_map_generic_desired_access(req->DesiredAccess);
2961
2962         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2963                 rc = smb_check_perm_dacl(conn, &path, &daccess,
2964                                          sess->user->uid);
2965                 if (rc)
2966                         goto err_out;
2967         }
2968
2969         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2970                 if (!file_present) {
2971                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2972                 } else {
2973                         ksmbd_vfs_query_maximal_access(idmap,
2974                                                             path.dentry,
2975                                                             &daccess);
2976                         already_permitted = true;
2977                 }
2978                 maximal_access = daccess;
2979         }
2980
2981         open_flags = smb2_create_open_flags(file_present, daccess,
2982                                             req->CreateDisposition,
2983                                             &may_flags);
2984
2985         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2986                 if (open_flags & (O_CREAT | O_TRUNC)) {
2987                         ksmbd_debug(SMB,
2988                                     "User does not have write permission\n");
2989                         rc = -EACCES;
2990                         goto err_out;
2991                 }
2992         }
2993
2994         /*create file if not present */
2995         if (!file_present) {
2996                 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
2997                                 posix_mode,
2998                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2999                 if (rc) {
3000                         if (rc == -ENOENT) {
3001                                 rc = -EIO;
3002                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
3003                         }
3004                         goto err_out;
3005                 }
3006
3007                 created = true;
3008                 idmap = mnt_idmap(path.mnt);
3009                 if (ea_buf) {
3010                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3011                             sizeof(struct smb2_ea_info)) {
3012                                 rc = -EINVAL;
3013                                 goto err_out;
3014                         }
3015
3016                         rc = smb2_set_ea(&ea_buf->ea,
3017                                          le32_to_cpu(ea_buf->ccontext.DataLength),
3018                                          &path);
3019                         if (rc == -EOPNOTSUPP)
3020                                 rc = 0;
3021                         else if (rc)
3022                                 goto err_out;
3023                 }
3024         } else if (!already_permitted) {
3025                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3026                  * because execute(search) permission on a parent directory,
3027                  * is already granted.
3028                  */
3029                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3030                         rc = inode_permission(idmap,
3031                                               d_inode(path.dentry),
3032                                               may_flags);
3033                         if (rc)
3034                                 goto err_out;
3035
3036                         if ((daccess & FILE_DELETE_LE) ||
3037                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3038                                 rc = inode_permission(idmap,
3039                                                       d_inode(path.dentry->d_parent),
3040                                                       MAY_EXEC | MAY_WRITE);
3041                                 if (rc)
3042                                         goto err_out;
3043                         }
3044                 }
3045         }
3046
3047         rc = ksmbd_query_inode_status(path.dentry->d_parent);
3048         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3049                 rc = -EBUSY;
3050                 goto err_out;
3051         }
3052
3053         rc = 0;
3054         filp = dentry_open(&path, open_flags, current_cred());
3055         if (IS_ERR(filp)) {
3056                 rc = PTR_ERR(filp);
3057                 pr_err("dentry open for dir failed, rc %d\n", rc);
3058                 goto err_out;
3059         }
3060
3061         if (file_present) {
3062                 if (!(open_flags & O_TRUNC))
3063                         file_info = FILE_OPENED;
3064                 else
3065                         file_info = FILE_OVERWRITTEN;
3066
3067                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3068                     FILE_SUPERSEDE_LE)
3069                         file_info = FILE_SUPERSEDED;
3070         } else if (open_flags & O_CREAT) {
3071                 file_info = FILE_CREATED;
3072         }
3073
3074         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3075
3076         /* Obtain Volatile-ID */
3077         fp = ksmbd_open_fd(work, filp);
3078         if (IS_ERR(fp)) {
3079                 fput(filp);
3080                 rc = PTR_ERR(fp);
3081                 fp = NULL;
3082                 goto err_out;
3083         }
3084
3085         /* Get Persistent-ID */
3086         ksmbd_open_durable_fd(fp);
3087         if (!has_file_id(fp->persistent_id)) {
3088                 rc = -ENOMEM;
3089                 goto err_out;
3090         }
3091
3092         fp->cdoption = req->CreateDisposition;
3093         fp->daccess = daccess;
3094         fp->saccess = req->ShareAccess;
3095         fp->coption = req->CreateOptions;
3096
3097         /* Set default windows and posix acls if creating new file */
3098         if (created) {
3099                 int posix_acl_rc;
3100                 struct inode *inode = d_inode(path.dentry);
3101
3102                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3103                                                            &path,
3104                                                            d_inode(path.dentry->d_parent));
3105                 if (posix_acl_rc)
3106                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3107
3108                 if (test_share_config_flag(work->tcon->share_conf,
3109                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3110                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3111                                               sess->user->gid);
3112                 }
3113
3114                 if (rc) {
3115                         rc = smb2_create_sd_buffer(work, req, &path);
3116                         if (rc) {
3117                                 if (posix_acl_rc)
3118                                         ksmbd_vfs_set_init_posix_acl(idmap,
3119                                                                      &path);
3120
3121                                 if (test_share_config_flag(work->tcon->share_conf,
3122                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3123                                         struct smb_fattr fattr;
3124                                         struct smb_ntsd *pntsd;
3125                                         int pntsd_size, ace_num = 0;
3126
3127                                         ksmbd_acls_fattr(&fattr, idmap, inode);
3128                                         if (fattr.cf_acls)
3129                                                 ace_num = fattr.cf_acls->a_count;
3130                                         if (fattr.cf_dacls)
3131                                                 ace_num += fattr.cf_dacls->a_count;
3132
3133                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
3134                                                         sizeof(struct smb_sid) * 3 +
3135                                                         sizeof(struct smb_acl) +
3136                                                         sizeof(struct smb_ace) * ace_num * 2,
3137                                                         GFP_KERNEL);
3138                                         if (!pntsd) {
3139                                                 posix_acl_release(fattr.cf_acls);
3140                                                 posix_acl_release(fattr.cf_dacls);
3141                                                 goto err_out;
3142                                         }
3143
3144                                         rc = build_sec_desc(idmap,
3145                                                             pntsd, NULL, 0,
3146                                                             OWNER_SECINFO |
3147                                                             GROUP_SECINFO |
3148                                                             DACL_SECINFO,
3149                                                             &pntsd_size, &fattr);
3150                                         posix_acl_release(fattr.cf_acls);
3151                                         posix_acl_release(fattr.cf_dacls);
3152                                         if (rc) {
3153                                                 kfree(pntsd);
3154                                                 goto err_out;
3155                                         }
3156
3157                                         rc = ksmbd_vfs_set_sd_xattr(conn,
3158                                                                     idmap,
3159                                                                     &path,
3160                                                                     pntsd,
3161                                                                     pntsd_size,
3162                                                                     false);
3163                                         kfree(pntsd);
3164                                         if (rc)
3165                                                 pr_err("failed to store ntacl in xattr : %d\n",
3166                                                        rc);
3167                                 }
3168                         }
3169                 }
3170                 rc = 0;
3171         }
3172
3173         if (stream_name) {
3174                 rc = smb2_set_stream_name_xattr(&path,
3175                                                 fp,
3176                                                 stream_name,
3177                                                 s_type);
3178                 if (rc)
3179                         goto err_out;
3180                 file_info = FILE_CREATED;
3181         }
3182
3183         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3184                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3185
3186         /* fp should be searchable through ksmbd_inode.m_fp_list
3187          * after daccess, saccess, attrib_only, and stream are
3188          * initialized.
3189          */
3190         write_lock(&fp->f_ci->m_lock);
3191         list_add(&fp->node, &fp->f_ci->m_fp_list);
3192         write_unlock(&fp->f_ci->m_lock);
3193
3194         /* Check delete pending among previous fp before oplock break */
3195         if (ksmbd_inode_pending_delete(fp)) {
3196                 rc = -EBUSY;
3197                 goto err_out;
3198         }
3199
3200         rc = ksmbd_vfs_getattr(&path, &stat);
3201         if (rc)
3202                 goto err_out;
3203
3204         if (stat.result_mask & STATX_BTIME)
3205                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3206         else
3207                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3208         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3209                 fp->f_ci->m_fattr =
3210                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3211
3212         if (!created)
3213                 smb2_update_xattrs(tcon, &path, fp);
3214         else
3215                 smb2_new_xattrs(tcon, &path, fp);
3216
3217         if (file_present || created)
3218                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3219
3220         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3221             !fp->attrib_only && !stream_name) {
3222                 smb_break_all_oplock(work, fp);
3223                 need_truncate = 1;
3224         }
3225
3226         req_op_level = req->RequestedOplockLevel;
3227         if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
3228                 lc = parse_lease_state(req, S_ISDIR(file_inode(filp)->i_mode));
3229
3230         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3231         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3232             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3233              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3234                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3235                         rc = share_ret;
3236                         goto err_out1;
3237                 }
3238         } else {
3239                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3240                         /*
3241                          * Compare parent lease using parent key. If there is no
3242                          * a lease that has same parent key, Send lease break
3243                          * notification.
3244                          */
3245                         smb_send_parent_lease_break_noti(fp, lc);
3246
3247                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3248                         ksmbd_debug(SMB,
3249                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3250                                     name, req_op_level, lc->req_state);
3251                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3252                         if (rc)
3253                                 goto err_out1;
3254                 } else if (open_flags == O_RDONLY &&
3255                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3256                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3257                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3258
3259                 rc = smb_grant_oplock(work, req_op_level,
3260                                       fp->persistent_id, fp,
3261                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3262                                       lc, share_ret);
3263                 if (rc < 0)
3264                         goto err_out1;
3265         }
3266
3267         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3268                 ksmbd_fd_set_delete_on_close(fp, file_info);
3269
3270         if (need_truncate) {
3271                 rc = smb2_create_truncate(&fp->filp->f_path);
3272                 if (rc)
3273                         goto err_out1;
3274         }
3275
3276         if (req->CreateContextsOffset) {
3277                 struct create_alloc_size_req *az_req;
3278
3279                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3280                                         SMB2_CREATE_ALLOCATION_SIZE, 4);
3281                 if (IS_ERR(az_req)) {
3282                         rc = PTR_ERR(az_req);
3283                         goto err_out1;
3284                 } else if (az_req) {
3285                         loff_t alloc_size;
3286                         int err;
3287
3288                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3289                             le32_to_cpu(az_req->ccontext.DataLength) <
3290                             sizeof(struct create_alloc_size_req)) {
3291                                 rc = -EINVAL;
3292                                 goto err_out1;
3293                         }
3294                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3295                         ksmbd_debug(SMB,
3296                                     "request smb2 create allocate size : %llu\n",
3297                                     alloc_size);
3298                         smb_break_all_levII_oplock(work, fp, 1);
3299                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3300                                             alloc_size);
3301                         if (err < 0)
3302                                 ksmbd_debug(SMB,
3303                                             "vfs_fallocate is failed : %d\n",
3304                                             err);
3305                 }
3306
3307                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3308                 if (IS_ERR(context)) {
3309                         rc = PTR_ERR(context);
3310                         goto err_out1;
3311                 } else if (context) {
3312                         ksmbd_debug(SMB, "get query on disk id context\n");
3313                         query_disk_id = 1;
3314                 }
3315         }
3316
3317         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3318
3319         rsp->StructureSize = cpu_to_le16(89);
3320         rcu_read_lock();
3321         opinfo = rcu_dereference(fp->f_opinfo);
3322         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3323         rcu_read_unlock();
3324         rsp->Flags = 0;
3325         rsp->CreateAction = cpu_to_le32(file_info);
3326         rsp->CreationTime = cpu_to_le64(fp->create_time);
3327         time = ksmbd_UnixTimeToNT(stat.atime);
3328         rsp->LastAccessTime = cpu_to_le64(time);
3329         time = ksmbd_UnixTimeToNT(stat.mtime);
3330         rsp->LastWriteTime = cpu_to_le64(time);
3331         time = ksmbd_UnixTimeToNT(stat.ctime);
3332         rsp->ChangeTime = cpu_to_le64(time);
3333         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3334                 cpu_to_le64(stat.blocks << 9);
3335         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3336         rsp->FileAttributes = fp->f_ci->m_fattr;
3337
3338         rsp->Reserved2 = 0;
3339
3340         rsp->PersistentFileId = fp->persistent_id;
3341         rsp->VolatileFileId = fp->volatile_id;
3342
3343         rsp->CreateContextsOffset = 0;
3344         rsp->CreateContextsLength = 0;
3345         iov_len = offsetof(struct smb2_create_rsp, Buffer);
3346
3347         /* If lease is request send lease context response */
3348         if (opinfo && opinfo->is_lease) {
3349                 struct create_context *lease_ccontext;
3350
3351                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3352                             name, opinfo->o_lease->state);
3353                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3354
3355                 lease_ccontext = (struct create_context *)rsp->Buffer;
3356                 contxt_cnt++;
3357                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3358                 le32_add_cpu(&rsp->CreateContextsLength,
3359                              conn->vals->create_lease_size);
3360                 iov_len += conn->vals->create_lease_size;
3361                 next_ptr = &lease_ccontext->Next;
3362                 next_off = conn->vals->create_lease_size;
3363         }
3364
3365         if (maximal_access_ctxt) {
3366                 struct create_context *mxac_ccontext;
3367
3368                 if (maximal_access == 0)
3369                         ksmbd_vfs_query_maximal_access(idmap,
3370                                                        path.dentry,
3371                                                        &maximal_access);
3372                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3373                                 le32_to_cpu(rsp->CreateContextsLength));
3374                 contxt_cnt++;
3375                 create_mxac_rsp_buf(rsp->Buffer +
3376                                 le32_to_cpu(rsp->CreateContextsLength),
3377                                 le32_to_cpu(maximal_access));
3378                 le32_add_cpu(&rsp->CreateContextsLength,
3379                              conn->vals->create_mxac_size);
3380                 iov_len += conn->vals->create_mxac_size;
3381                 if (next_ptr)
3382                         *next_ptr = cpu_to_le32(next_off);
3383                 next_ptr = &mxac_ccontext->Next;
3384                 next_off = conn->vals->create_mxac_size;
3385         }
3386
3387         if (query_disk_id) {
3388                 struct create_context *disk_id_ccontext;
3389
3390                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3391                                 le32_to_cpu(rsp->CreateContextsLength));
3392                 contxt_cnt++;
3393                 create_disk_id_rsp_buf(rsp->Buffer +
3394                                 le32_to_cpu(rsp->CreateContextsLength),
3395                                 stat.ino, tcon->id);
3396                 le32_add_cpu(&rsp->CreateContextsLength,
3397                              conn->vals->create_disk_id_size);
3398                 iov_len += conn->vals->create_disk_id_size;
3399                 if (next_ptr)
3400                         *next_ptr = cpu_to_le32(next_off);
3401                 next_ptr = &disk_id_ccontext->Next;
3402                 next_off = conn->vals->create_disk_id_size;
3403         }
3404
3405         if (posix_ctxt) {
3406                 contxt_cnt++;
3407                 create_posix_rsp_buf(rsp->Buffer +
3408                                 le32_to_cpu(rsp->CreateContextsLength),
3409                                 fp);
3410                 le32_add_cpu(&rsp->CreateContextsLength,
3411                              conn->vals->create_posix_size);
3412                 iov_len += conn->vals->create_posix_size;
3413                 if (next_ptr)
3414                         *next_ptr = cpu_to_le32(next_off);
3415         }
3416
3417         if (contxt_cnt > 0) {
3418                 rsp->CreateContextsOffset =
3419                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3420         }
3421
3422 err_out:
3423         if (rc && (file_present || created))
3424                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3425
3426 err_out1:
3427         ksmbd_revert_fsids(work);
3428
3429 err_out2:
3430         if (!rc) {
3431                 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3432                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3433         }
3434         if (rc) {
3435                 if (rc == -EINVAL)
3436                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3437                 else if (rc == -EOPNOTSUPP)
3438                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3439                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3440                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3441                 else if (rc == -ENOENT)
3442                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3443                 else if (rc == -EPERM)
3444                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3445                 else if (rc == -EBUSY)
3446                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3447                 else if (rc == -EBADF)
3448                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3449                 else if (rc == -ENOEXEC)
3450                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3451                 else if (rc == -ENXIO)
3452                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3453                 else if (rc == -EEXIST)
3454                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3455                 else if (rc == -EMFILE)
3456                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3457                 if (!rsp->hdr.Status)
3458                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3459
3460                 if (fp)
3461                         ksmbd_fd_put(work, fp);
3462                 smb2_set_err_rsp(work);
3463                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3464         }
3465
3466         kfree(name);
3467         kfree(lc);
3468
3469         return 0;
3470 }
3471
3472 static int readdir_info_level_struct_sz(int info_level)
3473 {
3474         switch (info_level) {
3475         case FILE_FULL_DIRECTORY_INFORMATION:
3476                 return sizeof(struct file_full_directory_info);
3477         case FILE_BOTH_DIRECTORY_INFORMATION:
3478                 return sizeof(struct file_both_directory_info);
3479         case FILE_DIRECTORY_INFORMATION:
3480                 return sizeof(struct file_directory_info);
3481         case FILE_NAMES_INFORMATION:
3482                 return sizeof(struct file_names_info);
3483         case FILEID_FULL_DIRECTORY_INFORMATION:
3484                 return sizeof(struct file_id_full_dir_info);
3485         case FILEID_BOTH_DIRECTORY_INFORMATION:
3486                 return sizeof(struct file_id_both_directory_info);
3487         case SMB_FIND_FILE_POSIX_INFO:
3488                 return sizeof(struct smb2_posix_info);
3489         default:
3490                 return -EOPNOTSUPP;
3491         }
3492 }
3493
3494 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3495 {
3496         switch (info_level) {
3497         case FILE_FULL_DIRECTORY_INFORMATION:
3498         {
3499                 struct file_full_directory_info *ffdinfo;
3500
3501                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3502                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3503                 d_info->name = ffdinfo->FileName;
3504                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3505                 return 0;
3506         }
3507         case FILE_BOTH_DIRECTORY_INFORMATION:
3508         {
3509                 struct file_both_directory_info *fbdinfo;
3510
3511                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3512                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3513                 d_info->name = fbdinfo->FileName;
3514                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3515                 return 0;
3516         }
3517         case FILE_DIRECTORY_INFORMATION:
3518         {
3519                 struct file_directory_info *fdinfo;
3520
3521                 fdinfo = (struct file_directory_info *)d_info->rptr;
3522                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3523                 d_info->name = fdinfo->FileName;
3524                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3525                 return 0;
3526         }
3527         case FILE_NAMES_INFORMATION:
3528         {
3529                 struct file_names_info *fninfo;
3530
3531                 fninfo = (struct file_names_info *)d_info->rptr;
3532                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3533                 d_info->name = fninfo->FileName;
3534                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3535                 return 0;
3536         }
3537         case FILEID_FULL_DIRECTORY_INFORMATION:
3538         {
3539                 struct file_id_full_dir_info *dinfo;
3540
3541                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3542                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3543                 d_info->name = dinfo->FileName;
3544                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3545                 return 0;
3546         }
3547         case FILEID_BOTH_DIRECTORY_INFORMATION:
3548         {
3549                 struct file_id_both_directory_info *fibdinfo;
3550
3551                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3552                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3553                 d_info->name = fibdinfo->FileName;
3554                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3555                 return 0;
3556         }
3557         case SMB_FIND_FILE_POSIX_INFO:
3558         {
3559                 struct smb2_posix_info *posix_info;
3560
3561                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3562                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3563                 d_info->name = posix_info->name;
3564                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3565                 return 0;
3566         }
3567         default:
3568                 return -EINVAL;
3569         }
3570 }
3571
3572 /**
3573  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3574  * buffer
3575  * @conn:       connection instance
3576  * @info_level: smb information level
3577  * @d_info:     structure included variables for query dir
3578  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3579  *
3580  * if directory has many entries, find first can't read it fully.
3581  * find next might be called multiple times to read remaining dir entries
3582  *
3583  * Return:      0 on success, otherwise error
3584  */
3585 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3586                                        struct ksmbd_dir_info *d_info,
3587                                        struct ksmbd_kstat *ksmbd_kstat)
3588 {
3589         int next_entry_offset = 0;
3590         char *conv_name;
3591         int conv_len;
3592         void *kstat;
3593         int struct_sz, rc = 0;
3594
3595         conv_name = ksmbd_convert_dir_info_name(d_info,
3596                                                 conn->local_nls,
3597                                                 &conv_len);
3598         if (!conv_name)
3599                 return -ENOMEM;
3600
3601         /* Somehow the name has only terminating NULL bytes */
3602         if (conv_len < 0) {
3603                 rc = -EINVAL;
3604                 goto free_conv_name;
3605         }
3606
3607         struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3608         next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3609         d_info->last_entry_off_align = next_entry_offset - struct_sz;
3610
3611         if (next_entry_offset > d_info->out_buf_len) {
3612                 d_info->out_buf_len = 0;
3613                 rc = -ENOSPC;
3614                 goto free_conv_name;
3615         }
3616
3617         kstat = d_info->wptr;
3618         if (info_level != FILE_NAMES_INFORMATION)
3619                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3620
3621         switch (info_level) {
3622         case FILE_FULL_DIRECTORY_INFORMATION:
3623         {
3624                 struct file_full_directory_info *ffdinfo;
3625
3626                 ffdinfo = (struct file_full_directory_info *)kstat;
3627                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3628                 ffdinfo->EaSize =
3629                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3630                 if (ffdinfo->EaSize)
3631                         ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3632                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3633                         ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3634                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3635                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3636                 break;
3637         }
3638         case FILE_BOTH_DIRECTORY_INFORMATION:
3639         {
3640                 struct file_both_directory_info *fbdinfo;
3641
3642                 fbdinfo = (struct file_both_directory_info *)kstat;
3643                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3644                 fbdinfo->EaSize =
3645                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3646                 if (fbdinfo->EaSize)
3647                         fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3648                 fbdinfo->ShortNameLength = 0;
3649                 fbdinfo->Reserved = 0;
3650                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3651                         fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3652                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3653                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3654                 break;
3655         }
3656         case FILE_DIRECTORY_INFORMATION:
3657         {
3658                 struct file_directory_info *fdinfo;
3659
3660                 fdinfo = (struct file_directory_info *)kstat;
3661                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3662                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3663                         fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3664                 memcpy(fdinfo->FileName, conv_name, conv_len);
3665                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3666                 break;
3667         }
3668         case FILE_NAMES_INFORMATION:
3669         {
3670                 struct file_names_info *fninfo;
3671
3672                 fninfo = (struct file_names_info *)kstat;
3673                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3674                 memcpy(fninfo->FileName, conv_name, conv_len);
3675                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3676                 break;
3677         }
3678         case FILEID_FULL_DIRECTORY_INFORMATION:
3679         {
3680                 struct file_id_full_dir_info *dinfo;
3681
3682                 dinfo = (struct file_id_full_dir_info *)kstat;
3683                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3684                 dinfo->EaSize =
3685                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3686                 if (dinfo->EaSize)
3687                         dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3688                 dinfo->Reserved = 0;
3689                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3690                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3691                         dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3692                 memcpy(dinfo->FileName, conv_name, conv_len);
3693                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3694                 break;
3695         }
3696         case FILEID_BOTH_DIRECTORY_INFORMATION:
3697         {
3698                 struct file_id_both_directory_info *fibdinfo;
3699
3700                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3701                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3702                 fibdinfo->EaSize =
3703                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3704                 if (fibdinfo->EaSize)
3705                         fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3706                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3707                 fibdinfo->ShortNameLength = 0;
3708                 fibdinfo->Reserved = 0;
3709                 fibdinfo->Reserved2 = cpu_to_le16(0);
3710                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3711                         fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3712                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3713                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3714                 break;
3715         }
3716         case SMB_FIND_FILE_POSIX_INFO:
3717         {
3718                 struct smb2_posix_info *posix_info;
3719                 u64 time;
3720
3721                 posix_info = (struct smb2_posix_info *)kstat;
3722                 posix_info->Ignored = 0;
3723                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3724                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3725                 posix_info->ChangeTime = cpu_to_le64(time);
3726                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3727                 posix_info->LastAccessTime = cpu_to_le64(time);
3728                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3729                 posix_info->LastWriteTime = cpu_to_le64(time);
3730                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3731                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3732                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3733                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3734                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3735                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3736                 posix_info->DosAttributes =
3737                         S_ISDIR(ksmbd_kstat->kstat->mode) ?
3738                                 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3739                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3740                         posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3741                 /*
3742                  * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3743                  * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3744                  *                sub_auth(4 * 1(num_subauth)) + RID(4).
3745                  */
3746                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3747                           SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3748                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3749                           SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3750                 memcpy(posix_info->name, conv_name, conv_len);
3751                 posix_info->name_len = cpu_to_le32(conv_len);
3752                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3753                 break;
3754         }
3755
3756         } /* switch (info_level) */
3757
3758         d_info->last_entry_offset = d_info->data_count;
3759         d_info->data_count += next_entry_offset;
3760         d_info->out_buf_len -= next_entry_offset;
3761         d_info->wptr += next_entry_offset;
3762
3763         ksmbd_debug(SMB,
3764                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3765                     info_level, d_info->out_buf_len,
3766                     next_entry_offset, d_info->data_count);
3767
3768 free_conv_name:
3769         kfree(conv_name);
3770         return rc;
3771 }
3772
3773 struct smb2_query_dir_private {
3774         struct ksmbd_work       *work;
3775         char                    *search_pattern;
3776         struct ksmbd_file       *dir_fp;
3777
3778         struct ksmbd_dir_info   *d_info;
3779         int                     info_level;
3780 };
3781
3782 static void lock_dir(struct ksmbd_file *dir_fp)
3783 {
3784         struct dentry *dir = dir_fp->filp->f_path.dentry;
3785
3786         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3787 }
3788
3789 static void unlock_dir(struct ksmbd_file *dir_fp)
3790 {
3791         struct dentry *dir = dir_fp->filp->f_path.dentry;
3792
3793         inode_unlock(d_inode(dir));
3794 }
3795
3796 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3797 {
3798         struct mnt_idmap        *idmap = file_mnt_idmap(priv->dir_fp->filp);
3799         struct kstat            kstat;
3800         struct ksmbd_kstat      ksmbd_kstat;
3801         int                     rc;
3802         int                     i;
3803
3804         for (i = 0; i < priv->d_info->num_entry; i++) {
3805                 struct dentry *dent;
3806
3807                 if (dentry_name(priv->d_info, priv->info_level))
3808                         return -EINVAL;
3809
3810                 lock_dir(priv->dir_fp);
3811                 dent = lookup_one(idmap, priv->d_info->name,
3812                                   priv->dir_fp->filp->f_path.dentry,
3813                                   priv->d_info->name_len);
3814                 unlock_dir(priv->dir_fp);
3815
3816                 if (IS_ERR(dent)) {
3817                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3818                                     priv->d_info->name,
3819                                     PTR_ERR(dent));
3820                         continue;
3821                 }
3822                 if (unlikely(d_is_negative(dent))) {
3823                         dput(dent);
3824                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
3825                                     priv->d_info->name);
3826                         continue;
3827                 }
3828
3829                 ksmbd_kstat.kstat = &kstat;
3830                 if (priv->info_level != FILE_NAMES_INFORMATION)
3831                         ksmbd_vfs_fill_dentry_attrs(priv->work,
3832                                                     idmap,
3833                                                     dent,
3834                                                     &ksmbd_kstat);
3835
3836                 rc = smb2_populate_readdir_entry(priv->work->conn,
3837                                                  priv->info_level,
3838                                                  priv->d_info,
3839                                                  &ksmbd_kstat);
3840                 dput(dent);
3841                 if (rc)
3842                         return rc;
3843         }
3844         return 0;
3845 }
3846
3847 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3848                                    int info_level)
3849 {
3850         int struct_sz;
3851         int conv_len;
3852         int next_entry_offset;
3853
3854         struct_sz = readdir_info_level_struct_sz(info_level);
3855         if (struct_sz == -EOPNOTSUPP)
3856                 return -EOPNOTSUPP;
3857
3858         conv_len = (d_info->name_len + 1) * 2;
3859         next_entry_offset = ALIGN(struct_sz + conv_len,
3860                                   KSMBD_DIR_INFO_ALIGNMENT);
3861
3862         if (next_entry_offset > d_info->out_buf_len) {
3863                 d_info->out_buf_len = 0;
3864                 return -ENOSPC;
3865         }
3866
3867         switch (info_level) {
3868         case FILE_FULL_DIRECTORY_INFORMATION:
3869         {
3870                 struct file_full_directory_info *ffdinfo;
3871
3872                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3873                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3874                 ffdinfo->FileName[d_info->name_len] = 0x00;
3875                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3876                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3877                 break;
3878         }
3879         case FILE_BOTH_DIRECTORY_INFORMATION:
3880         {
3881                 struct file_both_directory_info *fbdinfo;
3882
3883                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3884                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3885                 fbdinfo->FileName[d_info->name_len] = 0x00;
3886                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3887                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3888                 break;
3889         }
3890         case FILE_DIRECTORY_INFORMATION:
3891         {
3892                 struct file_directory_info *fdinfo;
3893
3894                 fdinfo = (struct file_directory_info *)d_info->wptr;
3895                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3896                 fdinfo->FileName[d_info->name_len] = 0x00;
3897                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3898                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3899                 break;
3900         }
3901         case FILE_NAMES_INFORMATION:
3902         {
3903                 struct file_names_info *fninfo;
3904
3905                 fninfo = (struct file_names_info *)d_info->wptr;
3906                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3907                 fninfo->FileName[d_info->name_len] = 0x00;
3908                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3909                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3910                 break;
3911         }
3912         case FILEID_FULL_DIRECTORY_INFORMATION:
3913         {
3914                 struct file_id_full_dir_info *dinfo;
3915
3916                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3917                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3918                 dinfo->FileName[d_info->name_len] = 0x00;
3919                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3920                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3921                 break;
3922         }
3923         case FILEID_BOTH_DIRECTORY_INFORMATION:
3924         {
3925                 struct file_id_both_directory_info *fibdinfo;
3926
3927                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3928                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3929                 fibdinfo->FileName[d_info->name_len] = 0x00;
3930                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3931                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3932                 break;
3933         }
3934         case SMB_FIND_FILE_POSIX_INFO:
3935         {
3936                 struct smb2_posix_info *posix_info;
3937
3938                 posix_info = (struct smb2_posix_info *)d_info->wptr;
3939                 memcpy(posix_info->name, d_info->name, d_info->name_len);
3940                 posix_info->name[d_info->name_len] = 0x00;
3941                 posix_info->name_len = cpu_to_le32(d_info->name_len);
3942                 posix_info->NextEntryOffset =
3943                         cpu_to_le32(next_entry_offset);
3944                 break;
3945         }
3946         } /* switch (info_level) */
3947
3948         d_info->num_entry++;
3949         d_info->out_buf_len -= next_entry_offset;
3950         d_info->wptr += next_entry_offset;
3951         return 0;
3952 }
3953
3954 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
3955                        loff_t offset, u64 ino, unsigned int d_type)
3956 {
3957         struct ksmbd_readdir_data       *buf;
3958         struct smb2_query_dir_private   *priv;
3959         struct ksmbd_dir_info           *d_info;
3960         int                             rc;
3961
3962         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
3963         priv    = buf->private;
3964         d_info  = priv->d_info;
3965
3966         /* dot and dotdot entries are already reserved */
3967         if (!strcmp(".", name) || !strcmp("..", name))
3968                 return true;
3969         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3970                 return true;
3971         if (!match_pattern(name, namlen, priv->search_pattern))
3972                 return true;
3973
3974         d_info->name            = name;
3975         d_info->name_len        = namlen;
3976         rc = reserve_populate_dentry(d_info, priv->info_level);
3977         if (rc)
3978                 return false;
3979         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
3980                 d_info->out_buf_len = 0;
3981         return true;
3982 }
3983
3984 static int verify_info_level(int info_level)
3985 {
3986         switch (info_level) {
3987         case FILE_FULL_DIRECTORY_INFORMATION:
3988         case FILE_BOTH_DIRECTORY_INFORMATION:
3989         case FILE_DIRECTORY_INFORMATION:
3990         case FILE_NAMES_INFORMATION:
3991         case FILEID_FULL_DIRECTORY_INFORMATION:
3992         case FILEID_BOTH_DIRECTORY_INFORMATION:
3993         case SMB_FIND_FILE_POSIX_INFO:
3994                 break;
3995         default:
3996                 return -EOPNOTSUPP;
3997         }
3998
3999         return 0;
4000 }
4001
4002 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
4003 {
4004         int free_len;
4005
4006         free_len = (int)(work->response_sz -
4007                 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
4008         return free_len;
4009 }
4010
4011 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4012                                      unsigned short hdr2_len,
4013                                      unsigned int out_buf_len)
4014 {
4015         int free_len;
4016
4017         if (out_buf_len > work->conn->vals->max_trans_size)
4018                 return -EINVAL;
4019
4020         free_len = smb2_resp_buf_len(work, hdr2_len);
4021         if (free_len < 0)
4022                 return -EINVAL;
4023
4024         return min_t(int, out_buf_len, free_len);
4025 }
4026
4027 int smb2_query_dir(struct ksmbd_work *work)
4028 {
4029         struct ksmbd_conn *conn = work->conn;
4030         struct smb2_query_directory_req *req;
4031         struct smb2_query_directory_rsp *rsp;
4032         struct ksmbd_share_config *share = work->tcon->share_conf;
4033         struct ksmbd_file *dir_fp = NULL;
4034         struct ksmbd_dir_info d_info;
4035         int rc = 0;
4036         char *srch_ptr = NULL;
4037         unsigned char srch_flag;
4038         int buffer_sz;
4039         struct smb2_query_dir_private query_dir_private = {NULL, };
4040
4041         WORK_BUFFERS(work, req, rsp);
4042
4043         if (ksmbd_override_fsids(work)) {
4044                 rsp->hdr.Status = STATUS_NO_MEMORY;
4045                 smb2_set_err_rsp(work);
4046                 return -ENOMEM;
4047         }
4048
4049         rc = verify_info_level(req->FileInformationClass);
4050         if (rc) {
4051                 rc = -EFAULT;
4052                 goto err_out2;
4053         }
4054
4055         dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4056         if (!dir_fp) {
4057                 rc = -EBADF;
4058                 goto err_out2;
4059         }
4060
4061         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4062             inode_permission(file_mnt_idmap(dir_fp->filp),
4063                              file_inode(dir_fp->filp),
4064                              MAY_READ | MAY_EXEC)) {
4065                 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4066                 rc = -EACCES;
4067                 goto err_out2;
4068         }
4069
4070         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4071                 pr_err("can't do query dir for a file\n");
4072                 rc = -EINVAL;
4073                 goto err_out2;
4074         }
4075
4076         srch_flag = req->Flags;
4077         srch_ptr = smb_strndup_from_utf16(req->Buffer,
4078                                           le16_to_cpu(req->FileNameLength), 1,
4079                                           conn->local_nls);
4080         if (IS_ERR(srch_ptr)) {
4081                 ksmbd_debug(SMB, "Search Pattern not found\n");
4082                 rc = -EINVAL;
4083                 goto err_out2;
4084         } else {
4085                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4086         }
4087
4088         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4089                 ksmbd_debug(SMB, "Restart directory scan\n");
4090                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4091         }
4092
4093         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4094         d_info.wptr = (char *)rsp->Buffer;
4095         d_info.rptr = (char *)rsp->Buffer;
4096         d_info.out_buf_len =
4097                 smb2_calc_max_out_buf_len(work, 8,
4098                                           le32_to_cpu(req->OutputBufferLength));
4099         if (d_info.out_buf_len < 0) {
4100                 rc = -EINVAL;
4101                 goto err_out;
4102         }
4103         d_info.flags = srch_flag;
4104
4105         /*
4106          * reserve dot and dotdot entries in head of buffer
4107          * in first response
4108          */
4109         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4110                                                dir_fp, &d_info, srch_ptr,
4111                                                smb2_populate_readdir_entry);
4112         if (rc == -ENOSPC)
4113                 rc = 0;
4114         else if (rc)
4115                 goto err_out;
4116
4117         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4118                 d_info.hide_dot_file = true;
4119
4120         buffer_sz                               = d_info.out_buf_len;
4121         d_info.rptr                             = d_info.wptr;
4122         query_dir_private.work                  = work;
4123         query_dir_private.search_pattern        = srch_ptr;
4124         query_dir_private.dir_fp                = dir_fp;
4125         query_dir_private.d_info                = &d_info;
4126         query_dir_private.info_level            = req->FileInformationClass;
4127         dir_fp->readdir_data.private            = &query_dir_private;
4128         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4129
4130         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4131         /*
4132          * req->OutputBufferLength is too small to contain even one entry.
4133          * In this case, it immediately returns OutputBufferLength 0 to client.
4134          */
4135         if (!d_info.out_buf_len && !d_info.num_entry)
4136                 goto no_buf_len;
4137         if (rc > 0 || rc == -ENOSPC)
4138                 rc = 0;
4139         else if (rc)
4140                 goto err_out;
4141
4142         d_info.wptr = d_info.rptr;
4143         d_info.out_buf_len = buffer_sz;
4144         rc = process_query_dir_entries(&query_dir_private);
4145         if (rc)
4146                 goto err_out;
4147
4148         if (!d_info.data_count && d_info.out_buf_len >= 0) {
4149                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4150                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4151                 } else {
4152                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4153                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
4154                 }
4155                 rsp->StructureSize = cpu_to_le16(9);
4156                 rsp->OutputBufferOffset = cpu_to_le16(0);
4157                 rsp->OutputBufferLength = cpu_to_le32(0);
4158                 rsp->Buffer[0] = 0;
4159                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4160                                        sizeof(struct smb2_query_directory_rsp));
4161                 if (rc)
4162                         goto err_out;
4163         } else {
4164 no_buf_len:
4165                 ((struct file_directory_info *)
4166                 ((char *)rsp->Buffer + d_info.last_entry_offset))
4167                 ->NextEntryOffset = 0;
4168                 if (d_info.data_count >= d_info.last_entry_off_align)
4169                         d_info.data_count -= d_info.last_entry_off_align;
4170
4171                 rsp->StructureSize = cpu_to_le16(9);
4172                 rsp->OutputBufferOffset = cpu_to_le16(72);
4173                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4174                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4175                                        offsetof(struct smb2_query_directory_rsp, Buffer) +
4176                                        d_info.data_count);
4177                 if (rc)
4178                         goto err_out;
4179         }
4180
4181         kfree(srch_ptr);
4182         ksmbd_fd_put(work, dir_fp);
4183         ksmbd_revert_fsids(work);
4184         return 0;
4185
4186 err_out:
4187         pr_err("error while processing smb2 query dir rc = %d\n", rc);
4188         kfree(srch_ptr);
4189
4190 err_out2:
4191         if (rc == -EINVAL)
4192                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4193         else if (rc == -EACCES)
4194                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4195         else if (rc == -ENOENT)
4196                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4197         else if (rc == -EBADF)
4198                 rsp->hdr.Status = STATUS_FILE_CLOSED;
4199         else if (rc == -ENOMEM)
4200                 rsp->hdr.Status = STATUS_NO_MEMORY;
4201         else if (rc == -EFAULT)
4202                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4203         else if (rc == -EIO)
4204                 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4205         if (!rsp->hdr.Status)
4206                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4207
4208         smb2_set_err_rsp(work);
4209         ksmbd_fd_put(work, dir_fp);
4210         ksmbd_revert_fsids(work);
4211         return 0;
4212 }
4213
4214 /**
4215  * buffer_check_err() - helper function to check buffer errors
4216  * @reqOutputBufferLength:      max buffer length expected in command response
4217  * @rsp:                query info response buffer contains output buffer length
4218  * @rsp_org:            base response buffer pointer in case of chained response
4219  *
4220  * Return:      0 on success, otherwise error
4221  */
4222 static int buffer_check_err(int reqOutputBufferLength,
4223                             struct smb2_query_info_rsp *rsp,
4224                             void *rsp_org)
4225 {
4226         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4227                 pr_err("Invalid Buffer Size Requested\n");
4228                 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4229                 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4230                 return -EINVAL;
4231         }
4232         return 0;
4233 }
4234
4235 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4236                                    void *rsp_org)
4237 {
4238         struct smb2_file_standard_info *sinfo;
4239
4240         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4241
4242         sinfo->AllocationSize = cpu_to_le64(4096);
4243         sinfo->EndOfFile = cpu_to_le64(0);
4244         sinfo->NumberOfLinks = cpu_to_le32(1);
4245         sinfo->DeletePending = 1;
4246         sinfo->Directory = 0;
4247         rsp->OutputBufferLength =
4248                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4249 }
4250
4251 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4252                                    void *rsp_org)
4253 {
4254         struct smb2_file_internal_info *file_info;
4255
4256         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4257
4258         /* any unique number */
4259         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4260         rsp->OutputBufferLength =
4261                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4262 }
4263
4264 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4265                                    struct smb2_query_info_req *req,
4266                                    struct smb2_query_info_rsp *rsp,
4267                                    void *rsp_org)
4268 {
4269         u64 id;
4270         int rc;
4271
4272         /*
4273          * Windows can sometime send query file info request on
4274          * pipe without opening it, checking error condition here
4275          */
4276         id = req->VolatileFileId;
4277         if (!ksmbd_session_rpc_method(sess, id))
4278                 return -ENOENT;
4279
4280         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4281                     req->FileInfoClass, req->VolatileFileId);
4282
4283         switch (req->FileInfoClass) {
4284         case FILE_STANDARD_INFORMATION:
4285                 get_standard_info_pipe(rsp, rsp_org);
4286                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4287                                       rsp, rsp_org);
4288                 break;
4289         case FILE_INTERNAL_INFORMATION:
4290                 get_internal_info_pipe(rsp, id, rsp_org);
4291                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4292                                       rsp, rsp_org);
4293                 break;
4294         default:
4295                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4296                             req->FileInfoClass);
4297                 rc = -EOPNOTSUPP;
4298         }
4299         return rc;
4300 }
4301
4302 /**
4303  * smb2_get_ea() - handler for smb2 get extended attribute command
4304  * @work:       smb work containing query info command buffer
4305  * @fp:         ksmbd_file pointer
4306  * @req:        get extended attribute request
4307  * @rsp:        response buffer pointer
4308  * @rsp_org:    base response buffer pointer in case of chained response
4309  *
4310  * Return:      0 on success, otherwise error
4311  */
4312 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4313                        struct smb2_query_info_req *req,
4314                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4315 {
4316         struct smb2_ea_info *eainfo, *prev_eainfo;
4317         char *name, *ptr, *xattr_list = NULL, *buf;
4318         int rc, name_len, value_len, xattr_list_len, idx;
4319         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4320         struct smb2_ea_info_req *ea_req = NULL;
4321         const struct path *path;
4322         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4323
4324         if (!(fp->daccess & FILE_READ_EA_LE)) {
4325                 pr_err("Not permitted to read ext attr : 0x%x\n",
4326                        fp->daccess);
4327                 return -EACCES;
4328         }
4329
4330         path = &fp->filp->f_path;
4331         /* single EA entry is requested with given user.* name */
4332         if (req->InputBufferLength) {
4333                 if (le32_to_cpu(req->InputBufferLength) <
4334                     sizeof(struct smb2_ea_info_req))
4335                         return -EINVAL;
4336
4337                 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4338         } else {
4339                 /* need to send all EAs, if no specific EA is requested*/
4340                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4341                         ksmbd_debug(SMB,
4342                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4343                                     le32_to_cpu(req->Flags));
4344         }
4345
4346         buf_free_len =
4347                 smb2_calc_max_out_buf_len(work, 8,
4348                                           le32_to_cpu(req->OutputBufferLength));
4349         if (buf_free_len < 0)
4350                 return -EINVAL;
4351
4352         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4353         if (rc < 0) {
4354                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4355                 goto out;
4356         } else if (!rc) { /* there is no EA in the file */
4357                 ksmbd_debug(SMB, "no ea data in the file\n");
4358                 goto done;
4359         }
4360         xattr_list_len = rc;
4361
4362         ptr = (char *)rsp->Buffer;
4363         eainfo = (struct smb2_ea_info *)ptr;
4364         prev_eainfo = eainfo;
4365         idx = 0;
4366
4367         while (idx < xattr_list_len) {
4368                 name = xattr_list + idx;
4369                 name_len = strlen(name);
4370
4371                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4372                 idx += name_len + 1;
4373
4374                 /*
4375                  * CIFS does not support EA other than user.* namespace,
4376                  * still keep the framework generic, to list other attrs
4377                  * in future.
4378                  */
4379                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4380                         continue;
4381
4382                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4383                              STREAM_PREFIX_LEN))
4384                         continue;
4385
4386                 if (req->InputBufferLength &&
4387                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4388                             ea_req->EaNameLength))
4389                         continue;
4390
4391                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4392                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4393                         continue;
4394
4395                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4396                         name_len -= XATTR_USER_PREFIX_LEN;
4397
4398                 ptr = eainfo->name + name_len + 1;
4399                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4400                                 name_len + 1);
4401                 /* bailout if xattr can't fit in buf_free_len */
4402                 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4403                                                name, &buf);
4404                 if (value_len <= 0) {
4405                         rc = -ENOENT;
4406                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4407                         goto out;
4408                 }
4409
4410                 buf_free_len -= value_len;
4411                 if (buf_free_len < 0) {
4412                         kfree(buf);
4413                         break;
4414                 }
4415
4416                 memcpy(ptr, buf, value_len);
4417                 kfree(buf);
4418
4419                 ptr += value_len;
4420                 eainfo->Flags = 0;
4421                 eainfo->EaNameLength = name_len;
4422
4423                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4424                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4425                                name_len);
4426                 else
4427                         memcpy(eainfo->name, name, name_len);
4428
4429                 eainfo->name[name_len] = '\0';
4430                 eainfo->EaValueLength = cpu_to_le16(value_len);
4431                 next_offset = offsetof(struct smb2_ea_info, name) +
4432                         name_len + 1 + value_len;
4433
4434                 /* align next xattr entry at 4 byte bundary */
4435                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4436                 if (alignment_bytes) {
4437                         memset(ptr, '\0', alignment_bytes);
4438                         ptr += alignment_bytes;
4439                         next_offset += alignment_bytes;
4440                         buf_free_len -= alignment_bytes;
4441                 }
4442                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4443                 prev_eainfo = eainfo;
4444                 eainfo = (struct smb2_ea_info *)ptr;
4445                 rsp_data_cnt += next_offset;
4446
4447                 if (req->InputBufferLength) {
4448                         ksmbd_debug(SMB, "single entry requested\n");
4449                         break;
4450                 }
4451         }
4452
4453         /* no more ea entries */
4454         prev_eainfo->NextEntryOffset = 0;
4455 done:
4456         rc = 0;
4457         if (rsp_data_cnt == 0)
4458                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4459         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4460 out:
4461         kvfree(xattr_list);
4462         return rc;
4463 }
4464
4465 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4466                                  struct ksmbd_file *fp, void *rsp_org)
4467 {
4468         struct smb2_file_access_info *file_info;
4469
4470         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4471         file_info->AccessFlags = fp->daccess;
4472         rsp->OutputBufferLength =
4473                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4474 }
4475
4476 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4477                                struct ksmbd_file *fp, void *rsp_org)
4478 {
4479         struct smb2_file_basic_info *basic_info;
4480         struct kstat stat;
4481         u64 time;
4482
4483         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4484                 pr_err("no right to read the attributes : 0x%x\n",
4485                        fp->daccess);
4486                 return -EACCES;
4487         }
4488
4489         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4490         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4491                          file_inode(fp->filp), &stat);
4492         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4493         time = ksmbd_UnixTimeToNT(stat.atime);
4494         basic_info->LastAccessTime = cpu_to_le64(time);
4495         time = ksmbd_UnixTimeToNT(stat.mtime);
4496         basic_info->LastWriteTime = cpu_to_le64(time);
4497         time = ksmbd_UnixTimeToNT(stat.ctime);
4498         basic_info->ChangeTime = cpu_to_le64(time);
4499         basic_info->Attributes = fp->f_ci->m_fattr;
4500         basic_info->Pad1 = 0;
4501         rsp->OutputBufferLength =
4502                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4503         return 0;
4504 }
4505
4506 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4507                                    struct ksmbd_file *fp, void *rsp_org)
4508 {
4509         struct smb2_file_standard_info *sinfo;
4510         unsigned int delete_pending;
4511         struct inode *inode;
4512         struct kstat stat;
4513
4514         inode = file_inode(fp->filp);
4515         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4516
4517         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4518         delete_pending = ksmbd_inode_pending_delete(fp);
4519
4520         sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4521         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4522         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4523         sinfo->DeletePending = delete_pending;
4524         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4525         rsp->OutputBufferLength =
4526                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4527 }
4528
4529 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4530                                     void *rsp_org)
4531 {
4532         struct smb2_file_alignment_info *file_info;
4533
4534         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4535         file_info->AlignmentRequirement = 0;
4536         rsp->OutputBufferLength =
4537                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4538 }
4539
4540 static int get_file_all_info(struct ksmbd_work *work,
4541                              struct smb2_query_info_rsp *rsp,
4542                              struct ksmbd_file *fp,
4543                              void *rsp_org)
4544 {
4545         struct ksmbd_conn *conn = work->conn;
4546         struct smb2_file_all_info *file_info;
4547         unsigned int delete_pending;
4548         struct inode *inode;
4549         struct kstat stat;
4550         int conv_len;
4551         char *filename;
4552         u64 time;
4553
4554         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4555                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4556                             fp->daccess);
4557                 return -EACCES;
4558         }
4559
4560         filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4561         if (IS_ERR(filename))
4562                 return PTR_ERR(filename);
4563
4564         inode = file_inode(fp->filp);
4565         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4566
4567         ksmbd_debug(SMB, "filename = %s\n", filename);
4568         delete_pending = ksmbd_inode_pending_delete(fp);
4569         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4570
4571         file_info->CreationTime = cpu_to_le64(fp->create_time);
4572         time = ksmbd_UnixTimeToNT(stat.atime);
4573         file_info->LastAccessTime = cpu_to_le64(time);
4574         time = ksmbd_UnixTimeToNT(stat.mtime);
4575         file_info->LastWriteTime = cpu_to_le64(time);
4576         time = ksmbd_UnixTimeToNT(stat.ctime);
4577         file_info->ChangeTime = cpu_to_le64(time);
4578         file_info->Attributes = fp->f_ci->m_fattr;
4579         file_info->Pad1 = 0;
4580         file_info->AllocationSize =
4581                 cpu_to_le64(inode->i_blocks << 9);
4582         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4583         file_info->NumberOfLinks =
4584                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4585         file_info->DeletePending = delete_pending;
4586         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4587         file_info->Pad2 = 0;
4588         file_info->IndexNumber = cpu_to_le64(stat.ino);
4589         file_info->EASize = 0;
4590         file_info->AccessFlags = fp->daccess;
4591         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4592         file_info->Mode = fp->coption;
4593         file_info->AlignmentRequirement = 0;
4594         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4595                                      PATH_MAX, conn->local_nls, 0);
4596         conv_len *= 2;
4597         file_info->FileNameLength = cpu_to_le32(conv_len);
4598         rsp->OutputBufferLength =
4599                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4600         kfree(filename);
4601         return 0;
4602 }
4603
4604 static void get_file_alternate_info(struct ksmbd_work *work,
4605                                     struct smb2_query_info_rsp *rsp,
4606                                     struct ksmbd_file *fp,
4607                                     void *rsp_org)
4608 {
4609         struct ksmbd_conn *conn = work->conn;
4610         struct smb2_file_alt_name_info *file_info;
4611         struct dentry *dentry = fp->filp->f_path.dentry;
4612         int conv_len;
4613
4614         spin_lock(&dentry->d_lock);
4615         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4616         conv_len = ksmbd_extract_shortname(conn,
4617                                            dentry->d_name.name,
4618                                            file_info->FileName);
4619         spin_unlock(&dentry->d_lock);
4620         file_info->FileNameLength = cpu_to_le32(conv_len);
4621         rsp->OutputBufferLength =
4622                 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4623 }
4624
4625 static void get_file_stream_info(struct ksmbd_work *work,
4626                                  struct smb2_query_info_rsp *rsp,
4627                                  struct ksmbd_file *fp,
4628                                  void *rsp_org)
4629 {
4630         struct ksmbd_conn *conn = work->conn;
4631         struct smb2_file_stream_info *file_info;
4632         char *stream_name, *xattr_list = NULL, *stream_buf;
4633         struct kstat stat;
4634         const struct path *path = &fp->filp->f_path;
4635         ssize_t xattr_list_len;
4636         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4637         int buf_free_len;
4638         struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4639
4640         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4641                          file_inode(fp->filp), &stat);
4642         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4643
4644         buf_free_len =
4645                 smb2_calc_max_out_buf_len(work, 8,
4646                                           le32_to_cpu(req->OutputBufferLength));
4647         if (buf_free_len < 0)
4648                 goto out;
4649
4650         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4651         if (xattr_list_len < 0) {
4652                 goto out;
4653         } else if (!xattr_list_len) {
4654                 ksmbd_debug(SMB, "empty xattr in the file\n");
4655                 goto out;
4656         }
4657
4658         while (idx < xattr_list_len) {
4659                 stream_name = xattr_list + idx;
4660                 streamlen = strlen(stream_name);
4661                 idx += streamlen + 1;
4662
4663                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4664
4665                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4666                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4667                         continue;
4668
4669                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4670                                 STREAM_PREFIX_LEN);
4671                 streamlen = stream_name_len;
4672
4673                 /* plus : size */
4674                 streamlen += 1;
4675                 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4676                 if (!stream_buf)
4677                         break;
4678
4679                 streamlen = snprintf(stream_buf, streamlen + 1,
4680                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4681
4682                 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4683                 if (next > buf_free_len) {
4684                         kfree(stream_buf);
4685                         break;
4686                 }
4687
4688                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4689                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4690                                                stream_buf, streamlen,
4691                                                conn->local_nls, 0);
4692                 streamlen *= 2;
4693                 kfree(stream_buf);
4694                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4695                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4696                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4697
4698                 nbytes += next;
4699                 buf_free_len -= next;
4700                 file_info->NextEntryOffset = cpu_to_le32(next);
4701         }
4702
4703 out:
4704         if (!S_ISDIR(stat.mode) &&
4705             buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4706                 file_info = (struct smb2_file_stream_info *)
4707                         &rsp->Buffer[nbytes];
4708                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4709                                               "::$DATA", 7, conn->local_nls, 0);
4710                 streamlen *= 2;
4711                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4712                 file_info->StreamSize = cpu_to_le64(stat.size);
4713                 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4714                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4715         }
4716
4717         /* last entry offset should be 0 */
4718         file_info->NextEntryOffset = 0;
4719         kvfree(xattr_list);
4720
4721         rsp->OutputBufferLength = cpu_to_le32(nbytes);
4722 }
4723
4724 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4725                                    struct ksmbd_file *fp, void *rsp_org)
4726 {
4727         struct smb2_file_internal_info *file_info;
4728         struct kstat stat;
4729
4730         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4731                          file_inode(fp->filp), &stat);
4732         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4733         file_info->IndexNumber = cpu_to_le64(stat.ino);
4734         rsp->OutputBufferLength =
4735                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4736 }
4737
4738 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4739                                       struct ksmbd_file *fp, void *rsp_org)
4740 {
4741         struct smb2_file_ntwrk_info *file_info;
4742         struct inode *inode;
4743         struct kstat stat;
4744         u64 time;
4745
4746         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4747                 pr_err("no right to read the attributes : 0x%x\n",
4748                        fp->daccess);
4749                 return -EACCES;
4750         }
4751
4752         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4753
4754         inode = file_inode(fp->filp);
4755         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4756
4757         file_info->CreationTime = cpu_to_le64(fp->create_time);
4758         time = ksmbd_UnixTimeToNT(stat.atime);
4759         file_info->LastAccessTime = cpu_to_le64(time);
4760         time = ksmbd_UnixTimeToNT(stat.mtime);
4761         file_info->LastWriteTime = cpu_to_le64(time);
4762         time = ksmbd_UnixTimeToNT(stat.ctime);
4763         file_info->ChangeTime = cpu_to_le64(time);
4764         file_info->Attributes = fp->f_ci->m_fattr;
4765         file_info->AllocationSize =
4766                 cpu_to_le64(inode->i_blocks << 9);
4767         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4768         file_info->Reserved = cpu_to_le32(0);
4769         rsp->OutputBufferLength =
4770                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4771         return 0;
4772 }
4773
4774 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4775 {
4776         struct smb2_file_ea_info *file_info;
4777
4778         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4779         file_info->EASize = 0;
4780         rsp->OutputBufferLength =
4781                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4782 }
4783
4784 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4785                                    struct ksmbd_file *fp, void *rsp_org)
4786 {
4787         struct smb2_file_pos_info *file_info;
4788
4789         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4790         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4791         rsp->OutputBufferLength =
4792                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4793 }
4794
4795 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4796                                struct ksmbd_file *fp, void *rsp_org)
4797 {
4798         struct smb2_file_mode_info *file_info;
4799
4800         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4801         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4802         rsp->OutputBufferLength =
4803                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4804 }
4805
4806 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4807                                       struct ksmbd_file *fp, void *rsp_org)
4808 {
4809         struct smb2_file_comp_info *file_info;
4810         struct kstat stat;
4811
4812         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4813                          file_inode(fp->filp), &stat);
4814
4815         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4816         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4817         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4818         file_info->CompressionUnitShift = 0;
4819         file_info->ChunkShift = 0;
4820         file_info->ClusterShift = 0;
4821         memset(&file_info->Reserved[0], 0, 3);
4822
4823         rsp->OutputBufferLength =
4824                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4825 }
4826
4827 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4828                                        struct ksmbd_file *fp, void *rsp_org)
4829 {
4830         struct smb2_file_attr_tag_info *file_info;
4831
4832         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4833                 pr_err("no right to read the attributes : 0x%x\n",
4834                        fp->daccess);
4835                 return -EACCES;
4836         }
4837
4838         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4839         file_info->FileAttributes = fp->f_ci->m_fattr;
4840         file_info->ReparseTag = 0;
4841         rsp->OutputBufferLength =
4842                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4843         return 0;
4844 }
4845
4846 static void find_file_posix_info(struct smb2_query_info_rsp *rsp,
4847                                 struct ksmbd_file *fp, void *rsp_org)
4848 {
4849         struct smb311_posix_qinfo *file_info;
4850         struct inode *inode = file_inode(fp->filp);
4851         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4852         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
4853         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
4854         u64 time;
4855         int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
4856
4857         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4858         file_info->CreationTime = cpu_to_le64(fp->create_time);
4859         time = ksmbd_UnixTimeToNT(inode->i_atime);
4860         file_info->LastAccessTime = cpu_to_le64(time);
4861         time = ksmbd_UnixTimeToNT(inode->i_mtime);
4862         file_info->LastWriteTime = cpu_to_le64(time);
4863         time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
4864         file_info->ChangeTime = cpu_to_le64(time);
4865         file_info->DosAttributes = fp->f_ci->m_fattr;
4866         file_info->Inode = cpu_to_le64(inode->i_ino);
4867         file_info->EndOfFile = cpu_to_le64(inode->i_size);
4868         file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4869         file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4870         file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
4871         file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4872
4873         /*
4874          * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4875          * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4876          *                sub_auth(4 * 1(num_subauth)) + RID(4).
4877          */
4878         id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
4879                   SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
4880         id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
4881                   SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
4882
4883         rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
4884 }
4885
4886 static int smb2_get_info_file(struct ksmbd_work *work,
4887                               struct smb2_query_info_req *req,
4888                               struct smb2_query_info_rsp *rsp)
4889 {
4890         struct ksmbd_file *fp;
4891         int fileinfoclass = 0;
4892         int rc = 0;
4893         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4894
4895         if (test_share_config_flag(work->tcon->share_conf,
4896                                    KSMBD_SHARE_FLAG_PIPE)) {
4897                 /* smb2 info file called for pipe */
4898                 return smb2_get_info_file_pipe(work->sess, req, rsp,
4899                                                work->response_buf);
4900         }
4901
4902         if (work->next_smb2_rcv_hdr_off) {
4903                 if (!has_file_id(req->VolatileFileId)) {
4904                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4905                                     work->compound_fid);
4906                         id = work->compound_fid;
4907                         pid = work->compound_pfid;
4908                 }
4909         }
4910
4911         if (!has_file_id(id)) {
4912                 id = req->VolatileFileId;
4913                 pid = req->PersistentFileId;
4914         }
4915
4916         fp = ksmbd_lookup_fd_slow(work, id, pid);
4917         if (!fp)
4918                 return -ENOENT;
4919
4920         fileinfoclass = req->FileInfoClass;
4921
4922         switch (fileinfoclass) {
4923         case FILE_ACCESS_INFORMATION:
4924                 get_file_access_info(rsp, fp, work->response_buf);
4925                 break;
4926
4927         case FILE_BASIC_INFORMATION:
4928                 rc = get_file_basic_info(rsp, fp, work->response_buf);
4929                 break;
4930
4931         case FILE_STANDARD_INFORMATION:
4932                 get_file_standard_info(rsp, fp, work->response_buf);
4933                 break;
4934
4935         case FILE_ALIGNMENT_INFORMATION:
4936                 get_file_alignment_info(rsp, work->response_buf);
4937                 break;
4938
4939         case FILE_ALL_INFORMATION:
4940                 rc = get_file_all_info(work, rsp, fp, work->response_buf);
4941                 break;
4942
4943         case FILE_ALTERNATE_NAME_INFORMATION:
4944                 get_file_alternate_info(work, rsp, fp, work->response_buf);
4945                 break;
4946
4947         case FILE_STREAM_INFORMATION:
4948                 get_file_stream_info(work, rsp, fp, work->response_buf);
4949                 break;
4950
4951         case FILE_INTERNAL_INFORMATION:
4952                 get_file_internal_info(rsp, fp, work->response_buf);
4953                 break;
4954
4955         case FILE_NETWORK_OPEN_INFORMATION:
4956                 rc = get_file_network_open_info(rsp, fp, work->response_buf);
4957                 break;
4958
4959         case FILE_EA_INFORMATION:
4960                 get_file_ea_info(rsp, work->response_buf);
4961                 break;
4962
4963         case FILE_FULL_EA_INFORMATION:
4964                 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4965                 break;
4966
4967         case FILE_POSITION_INFORMATION:
4968                 get_file_position_info(rsp, fp, work->response_buf);
4969                 break;
4970
4971         case FILE_MODE_INFORMATION:
4972                 get_file_mode_info(rsp, fp, work->response_buf);
4973                 break;
4974
4975         case FILE_COMPRESSION_INFORMATION:
4976                 get_file_compression_info(rsp, fp, work->response_buf);
4977                 break;
4978
4979         case FILE_ATTRIBUTE_TAG_INFORMATION:
4980                 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4981                 break;
4982         case SMB_FIND_FILE_POSIX_INFO:
4983                 if (!work->tcon->posix_extensions) {
4984                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4985                         rc = -EOPNOTSUPP;
4986                 } else {
4987                         find_file_posix_info(rsp, fp, work->response_buf);
4988                 }
4989                 break;
4990         default:
4991                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4992                             fileinfoclass);
4993                 rc = -EOPNOTSUPP;
4994         }
4995         if (!rc)
4996                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4997                                       rsp, work->response_buf);
4998         ksmbd_fd_put(work, fp);
4999         return rc;
5000 }
5001
5002 static int smb2_get_info_filesystem(struct ksmbd_work *work,
5003                                     struct smb2_query_info_req *req,
5004                                     struct smb2_query_info_rsp *rsp)
5005 {
5006         struct ksmbd_session *sess = work->sess;
5007         struct ksmbd_conn *conn = work->conn;
5008         struct ksmbd_share_config *share = work->tcon->share_conf;
5009         int fsinfoclass = 0;
5010         struct kstatfs stfs;
5011         struct path path;
5012         int rc = 0, len;
5013
5014         if (!share->path)
5015                 return -EIO;
5016
5017         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5018         if (rc) {
5019                 pr_err("cannot create vfs path\n");
5020                 return -EIO;
5021         }
5022
5023         rc = vfs_statfs(&path, &stfs);
5024         if (rc) {
5025                 pr_err("cannot do stat of path %s\n", share->path);
5026                 path_put(&path);
5027                 return -EIO;
5028         }
5029
5030         fsinfoclass = req->FileInfoClass;
5031
5032         switch (fsinfoclass) {
5033         case FS_DEVICE_INFORMATION:
5034         {
5035                 struct filesystem_device_info *info;
5036
5037                 info = (struct filesystem_device_info *)rsp->Buffer;
5038
5039                 info->DeviceType = cpu_to_le32(stfs.f_type);
5040                 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
5041                 rsp->OutputBufferLength = cpu_to_le32(8);
5042                 break;
5043         }
5044         case FS_ATTRIBUTE_INFORMATION:
5045         {
5046                 struct filesystem_attribute_info *info;
5047                 size_t sz;
5048
5049                 info = (struct filesystem_attribute_info *)rsp->Buffer;
5050                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5051                                                FILE_PERSISTENT_ACLS |
5052                                                FILE_UNICODE_ON_DISK |
5053                                                FILE_CASE_PRESERVED_NAMES |
5054                                                FILE_CASE_SENSITIVE_SEARCH |
5055                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
5056
5057                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5058
5059                 if (test_share_config_flag(work->tcon->share_conf,
5060                     KSMBD_SHARE_FLAG_STREAMS))
5061                         info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5062
5063                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5064                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5065                                         "NTFS", PATH_MAX, conn->local_nls, 0);
5066                 len = len * 2;
5067                 info->FileSystemNameLen = cpu_to_le32(len);
5068                 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5069                 rsp->OutputBufferLength = cpu_to_le32(sz);
5070                 break;
5071         }
5072         case FS_VOLUME_INFORMATION:
5073         {
5074                 struct filesystem_vol_info *info;
5075                 size_t sz;
5076                 unsigned int serial_crc = 0;
5077
5078                 info = (struct filesystem_vol_info *)(rsp->Buffer);
5079                 info->VolumeCreationTime = 0;
5080                 serial_crc = crc32_le(serial_crc, share->name,
5081                                       strlen(share->name));
5082                 serial_crc = crc32_le(serial_crc, share->path,
5083                                       strlen(share->path));
5084                 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5085                                       strlen(ksmbd_netbios_name()));
5086                 /* Taking dummy value of serial number*/
5087                 info->SerialNumber = cpu_to_le32(serial_crc);
5088                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5089                                         share->name, PATH_MAX,
5090                                         conn->local_nls, 0);
5091                 len = len * 2;
5092                 info->VolumeLabelSize = cpu_to_le32(len);
5093                 info->Reserved = 0;
5094                 sz = sizeof(struct filesystem_vol_info) - 2 + len;
5095                 rsp->OutputBufferLength = cpu_to_le32(sz);
5096                 break;
5097         }
5098         case FS_SIZE_INFORMATION:
5099         {
5100                 struct filesystem_info *info;
5101
5102                 info = (struct filesystem_info *)(rsp->Buffer);
5103                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5104                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5105                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5106                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5107                 rsp->OutputBufferLength = cpu_to_le32(24);
5108                 break;
5109         }
5110         case FS_FULL_SIZE_INFORMATION:
5111         {
5112                 struct smb2_fs_full_size_info *info;
5113
5114                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5115                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5116                 info->CallerAvailableAllocationUnits =
5117                                         cpu_to_le64(stfs.f_bavail);
5118                 info->ActualAvailableAllocationUnits =
5119                                         cpu_to_le64(stfs.f_bfree);
5120                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5121                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5122                 rsp->OutputBufferLength = cpu_to_le32(32);
5123                 break;
5124         }
5125         case FS_OBJECT_ID_INFORMATION:
5126         {
5127                 struct object_id_info *info;
5128
5129                 info = (struct object_id_info *)(rsp->Buffer);
5130
5131                 if (!user_guest(sess->user))
5132                         memcpy(info->objid, user_passkey(sess->user), 16);
5133                 else
5134                         memset(info->objid, 0, 16);
5135
5136                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5137                 info->extended_info.version = cpu_to_le32(1);
5138                 info->extended_info.release = cpu_to_le32(1);
5139                 info->extended_info.rel_date = 0;
5140                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5141                 rsp->OutputBufferLength = cpu_to_le32(64);
5142                 break;
5143         }
5144         case FS_SECTOR_SIZE_INFORMATION:
5145         {
5146                 struct smb3_fs_ss_info *info;
5147                 unsigned int sector_size =
5148                         min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5149
5150                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5151
5152                 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5153                 info->PhysicalBytesPerSectorForAtomicity =
5154                                 cpu_to_le32(sector_size);
5155                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5156                 info->FSEffPhysicalBytesPerSectorForAtomicity =
5157                                 cpu_to_le32(sector_size);
5158                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5159                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5160                 info->ByteOffsetForSectorAlignment = 0;
5161                 info->ByteOffsetForPartitionAlignment = 0;
5162                 rsp->OutputBufferLength = cpu_to_le32(28);
5163                 break;
5164         }
5165         case FS_CONTROL_INFORMATION:
5166         {
5167                 /*
5168                  * TODO : The current implementation is based on
5169                  * test result with win7(NTFS) server. It's need to
5170                  * modify this to get valid Quota values
5171                  * from Linux kernel
5172                  */
5173                 struct smb2_fs_control_info *info;
5174
5175                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5176                 info->FreeSpaceStartFiltering = 0;
5177                 info->FreeSpaceThreshold = 0;
5178                 info->FreeSpaceStopFiltering = 0;
5179                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5180                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5181                 info->Padding = 0;
5182                 rsp->OutputBufferLength = cpu_to_le32(48);
5183                 break;
5184         }
5185         case FS_POSIX_INFORMATION:
5186         {
5187                 struct filesystem_posix_info *info;
5188
5189                 if (!work->tcon->posix_extensions) {
5190                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5191                         rc = -EOPNOTSUPP;
5192                 } else {
5193                         info = (struct filesystem_posix_info *)(rsp->Buffer);
5194                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5195                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
5196                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5197                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5198                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5199                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5200                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5201                         rsp->OutputBufferLength = cpu_to_le32(56);
5202                 }
5203                 break;
5204         }
5205         default:
5206                 path_put(&path);
5207                 return -EOPNOTSUPP;
5208         }
5209         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5210                               rsp, work->response_buf);
5211         path_put(&path);
5212         return rc;
5213 }
5214
5215 static int smb2_get_info_sec(struct ksmbd_work *work,
5216                              struct smb2_query_info_req *req,
5217                              struct smb2_query_info_rsp *rsp)
5218 {
5219         struct ksmbd_file *fp;
5220         struct mnt_idmap *idmap;
5221         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5222         struct smb_fattr fattr = {{0}};
5223         struct inode *inode;
5224         __u32 secdesclen = 0;
5225         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5226         int addition_info = le32_to_cpu(req->AdditionalInformation);
5227         int rc = 0, ppntsd_size = 0;
5228
5229         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5230                               PROTECTED_DACL_SECINFO |
5231                               UNPROTECTED_DACL_SECINFO)) {
5232                 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5233                        addition_info);
5234
5235                 pntsd->revision = cpu_to_le16(1);
5236                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5237                 pntsd->osidoffset = 0;
5238                 pntsd->gsidoffset = 0;
5239                 pntsd->sacloffset = 0;
5240                 pntsd->dacloffset = 0;
5241
5242                 secdesclen = sizeof(struct smb_ntsd);
5243                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5244
5245                 return 0;
5246         }
5247
5248         if (work->next_smb2_rcv_hdr_off) {
5249                 if (!has_file_id(req->VolatileFileId)) {
5250                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5251                                     work->compound_fid);
5252                         id = work->compound_fid;
5253                         pid = work->compound_pfid;
5254                 }
5255         }
5256
5257         if (!has_file_id(id)) {
5258                 id = req->VolatileFileId;
5259                 pid = req->PersistentFileId;
5260         }
5261
5262         fp = ksmbd_lookup_fd_slow(work, id, pid);
5263         if (!fp)
5264                 return -ENOENT;
5265
5266         idmap = file_mnt_idmap(fp->filp);
5267         inode = file_inode(fp->filp);
5268         ksmbd_acls_fattr(&fattr, idmap, inode);
5269
5270         if (test_share_config_flag(work->tcon->share_conf,
5271                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5272                 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5273                                                      fp->filp->f_path.dentry,
5274                                                      &ppntsd);
5275
5276         /* Check if sd buffer size exceeds response buffer size */
5277         if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5278                 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5279                                     addition_info, &secdesclen, &fattr);
5280         posix_acl_release(fattr.cf_acls);
5281         posix_acl_release(fattr.cf_dacls);
5282         kfree(ppntsd);
5283         ksmbd_fd_put(work, fp);
5284         if (rc)
5285                 return rc;
5286
5287         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5288         return 0;
5289 }
5290
5291 /**
5292  * smb2_query_info() - handler for smb2 query info command
5293  * @work:       smb work containing query info request buffer
5294  *
5295  * Return:      0 on success, otherwise error
5296  */
5297 int smb2_query_info(struct ksmbd_work *work)
5298 {
5299         struct smb2_query_info_req *req;
5300         struct smb2_query_info_rsp *rsp;
5301         int rc = 0;
5302
5303         WORK_BUFFERS(work, req, rsp);
5304
5305         ksmbd_debug(SMB, "GOT query info request\n");
5306
5307         switch (req->InfoType) {
5308         case SMB2_O_INFO_FILE:
5309                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5310                 rc = smb2_get_info_file(work, req, rsp);
5311                 break;
5312         case SMB2_O_INFO_FILESYSTEM:
5313                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5314                 rc = smb2_get_info_filesystem(work, req, rsp);
5315                 break;
5316         case SMB2_O_INFO_SECURITY:
5317                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5318                 rc = smb2_get_info_sec(work, req, rsp);
5319                 break;
5320         default:
5321                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5322                             req->InfoType);
5323                 rc = -EOPNOTSUPP;
5324         }
5325
5326         if (!rc) {
5327                 rsp->StructureSize = cpu_to_le16(9);
5328                 rsp->OutputBufferOffset = cpu_to_le16(72);
5329                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5330                                        offsetof(struct smb2_query_info_rsp, Buffer) +
5331                                         le32_to_cpu(rsp->OutputBufferLength));
5332         }
5333
5334         if (rc < 0) {
5335                 if (rc == -EACCES)
5336                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5337                 else if (rc == -ENOENT)
5338                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5339                 else if (rc == -EIO)
5340                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5341                 else if (rc == -ENOMEM)
5342                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5343                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5344                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5345                 smb2_set_err_rsp(work);
5346
5347                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5348                             rc);
5349                 return rc;
5350         }
5351         return 0;
5352 }
5353
5354 /**
5355  * smb2_close_pipe() - handler for closing IPC pipe
5356  * @work:       smb work containing close request buffer
5357  *
5358  * Return:      0
5359  */
5360 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5361 {
5362         u64 id;
5363         struct smb2_close_req *req;
5364         struct smb2_close_rsp *rsp;
5365
5366         WORK_BUFFERS(work, req, rsp);
5367
5368         id = req->VolatileFileId;
5369         ksmbd_session_rpc_close(work->sess, id);
5370
5371         rsp->StructureSize = cpu_to_le16(60);
5372         rsp->Flags = 0;
5373         rsp->Reserved = 0;
5374         rsp->CreationTime = 0;
5375         rsp->LastAccessTime = 0;
5376         rsp->LastWriteTime = 0;
5377         rsp->ChangeTime = 0;
5378         rsp->AllocationSize = 0;
5379         rsp->EndOfFile = 0;
5380         rsp->Attributes = 0;
5381
5382         return ksmbd_iov_pin_rsp(work, (void *)rsp,
5383                                  sizeof(struct smb2_close_rsp));
5384 }
5385
5386 /**
5387  * smb2_close() - handler for smb2 close file command
5388  * @work:       smb work containing close request buffer
5389  *
5390  * Return:      0
5391  */
5392 int smb2_close(struct ksmbd_work *work)
5393 {
5394         u64 volatile_id = KSMBD_NO_FID;
5395         u64 sess_id;
5396         struct smb2_close_req *req;
5397         struct smb2_close_rsp *rsp;
5398         struct ksmbd_conn *conn = work->conn;
5399         struct ksmbd_file *fp;
5400         struct inode *inode;
5401         u64 time;
5402         int err = 0;
5403
5404         WORK_BUFFERS(work, req, rsp);
5405
5406         if (test_share_config_flag(work->tcon->share_conf,
5407                                    KSMBD_SHARE_FLAG_PIPE)) {
5408                 ksmbd_debug(SMB, "IPC pipe close request\n");
5409                 return smb2_close_pipe(work);
5410         }
5411
5412         sess_id = le64_to_cpu(req->hdr.SessionId);
5413         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5414                 sess_id = work->compound_sid;
5415
5416         work->compound_sid = 0;
5417         if (check_session_id(conn, sess_id)) {
5418                 work->compound_sid = sess_id;
5419         } else {
5420                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5421                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5422                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5423                 err = -EBADF;
5424                 goto out;
5425         }
5426
5427         if (work->next_smb2_rcv_hdr_off &&
5428             !has_file_id(req->VolatileFileId)) {
5429                 if (!has_file_id(work->compound_fid)) {
5430                         /* file already closed, return FILE_CLOSED */
5431                         ksmbd_debug(SMB, "file already closed\n");
5432                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5433                         err = -EBADF;
5434                         goto out;
5435                 } else {
5436                         ksmbd_debug(SMB,
5437                                     "Compound request set FID = %llu:%llu\n",
5438                                     work->compound_fid,
5439                                     work->compound_pfid);
5440                         volatile_id = work->compound_fid;
5441
5442                         /* file closed, stored id is not valid anymore */
5443                         work->compound_fid = KSMBD_NO_FID;
5444                         work->compound_pfid = KSMBD_NO_FID;
5445                 }
5446         } else {
5447                 volatile_id = req->VolatileFileId;
5448         }
5449         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5450
5451         rsp->StructureSize = cpu_to_le16(60);
5452         rsp->Reserved = 0;
5453
5454         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5455                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5456                 if (!fp) {
5457                         err = -ENOENT;
5458                         goto out;
5459                 }
5460
5461                 inode = file_inode(fp->filp);
5462                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5463                 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5464                         cpu_to_le64(inode->i_blocks << 9);
5465                 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5466                 rsp->Attributes = fp->f_ci->m_fattr;
5467                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5468                 time = ksmbd_UnixTimeToNT(inode->i_atime);
5469                 rsp->LastAccessTime = cpu_to_le64(time);
5470                 time = ksmbd_UnixTimeToNT(inode->i_mtime);
5471                 rsp->LastWriteTime = cpu_to_le64(time);
5472                 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
5473                 rsp->ChangeTime = cpu_to_le64(time);
5474                 ksmbd_fd_put(work, fp);
5475         } else {
5476                 rsp->Flags = 0;
5477                 rsp->AllocationSize = 0;
5478                 rsp->EndOfFile = 0;
5479                 rsp->Attributes = 0;
5480                 rsp->CreationTime = 0;
5481                 rsp->LastAccessTime = 0;
5482                 rsp->LastWriteTime = 0;
5483                 rsp->ChangeTime = 0;
5484         }
5485
5486         err = ksmbd_close_fd(work, volatile_id);
5487 out:
5488         if (!err)
5489                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5490                                         sizeof(struct smb2_close_rsp));
5491
5492         if (err) {
5493                 if (rsp->hdr.Status == 0)
5494                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5495                 smb2_set_err_rsp(work);
5496         }
5497
5498         return err;
5499 }
5500
5501 /**
5502  * smb2_echo() - handler for smb2 echo(ping) command
5503  * @work:       smb work containing echo request buffer
5504  *
5505  * Return:      0
5506  */
5507 int smb2_echo(struct ksmbd_work *work)
5508 {
5509         struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5510
5511         if (work->next_smb2_rcv_hdr_off)
5512                 rsp = ksmbd_resp_buf_next(work);
5513
5514         rsp->StructureSize = cpu_to_le16(4);
5515         rsp->Reserved = 0;
5516         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5517 }
5518
5519 static int smb2_rename(struct ksmbd_work *work,
5520                        struct ksmbd_file *fp,
5521                        struct smb2_file_rename_info *file_info,
5522                        struct nls_table *local_nls)
5523 {
5524         struct ksmbd_share_config *share = fp->tcon->share_conf;
5525         char *new_name = NULL;
5526         int rc, flags = 0;
5527
5528         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5529         new_name = smb2_get_name(file_info->FileName,
5530                                  le32_to_cpu(file_info->FileNameLength),
5531                                  local_nls);
5532         if (IS_ERR(new_name))
5533                 return PTR_ERR(new_name);
5534
5535         if (strchr(new_name, ':')) {
5536                 int s_type;
5537                 char *xattr_stream_name, *stream_name = NULL;
5538                 size_t xattr_stream_size;
5539                 int len;
5540
5541                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5542                 if (rc < 0)
5543                         goto out;
5544
5545                 len = strlen(new_name);
5546                 if (len > 0 && new_name[len - 1] != '/') {
5547                         pr_err("not allow base filename in rename\n");
5548                         rc = -ESHARE;
5549                         goto out;
5550                 }
5551
5552                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5553                                                  &xattr_stream_name,
5554                                                  &xattr_stream_size,
5555                                                  s_type);
5556                 if (rc)
5557                         goto out;
5558
5559                 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5560                                         &fp->filp->f_path,
5561                                         xattr_stream_name,
5562                                         NULL, 0, 0, true);
5563                 if (rc < 0) {
5564                         pr_err("failed to store stream name in xattr: %d\n",
5565                                rc);
5566                         rc = -EINVAL;
5567                         goto out;
5568                 }
5569
5570                 goto out;
5571         }
5572
5573         ksmbd_debug(SMB, "new name %s\n", new_name);
5574         if (ksmbd_share_veto_filename(share, new_name)) {
5575                 rc = -ENOENT;
5576                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5577                 goto out;
5578         }
5579
5580         if (!file_info->ReplaceIfExists)
5581                 flags = RENAME_NOREPLACE;
5582
5583         rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5584 out:
5585         kfree(new_name);
5586         return rc;
5587 }
5588
5589 static int smb2_create_link(struct ksmbd_work *work,
5590                             struct ksmbd_share_config *share,
5591                             struct smb2_file_link_info *file_info,
5592                             unsigned int buf_len, struct file *filp,
5593                             struct nls_table *local_nls)
5594 {
5595         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5596         struct path path, parent_path;
5597         bool file_present = false;
5598         int rc;
5599
5600         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5601                         le32_to_cpu(file_info->FileNameLength))
5602                 return -EINVAL;
5603
5604         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5605         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5606         if (!pathname)
5607                 return -ENOMEM;
5608
5609         link_name = smb2_get_name(file_info->FileName,
5610                                   le32_to_cpu(file_info->FileNameLength),
5611                                   local_nls);
5612         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5613                 rc = -EINVAL;
5614                 goto out;
5615         }
5616
5617         ksmbd_debug(SMB, "link name is %s\n", link_name);
5618         target_name = file_path(filp, pathname, PATH_MAX);
5619         if (IS_ERR(target_name)) {
5620                 rc = -EINVAL;
5621                 goto out;
5622         }
5623
5624         ksmbd_debug(SMB, "target name is %s\n", target_name);
5625         rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5626                                         &parent_path, &path, 0);
5627         if (rc) {
5628                 if (rc != -ENOENT)
5629                         goto out;
5630         } else
5631                 file_present = true;
5632
5633         if (file_info->ReplaceIfExists) {
5634                 if (file_present) {
5635                         rc = ksmbd_vfs_remove_file(work, &path);
5636                         if (rc) {
5637                                 rc = -EINVAL;
5638                                 ksmbd_debug(SMB, "cannot delete %s\n",
5639                                             link_name);
5640                                 goto out;
5641                         }
5642                 }
5643         } else {
5644                 if (file_present) {
5645                         rc = -EEXIST;
5646                         ksmbd_debug(SMB, "link already exists\n");
5647                         goto out;
5648                 }
5649         }
5650
5651         rc = ksmbd_vfs_link(work, target_name, link_name);
5652         if (rc)
5653                 rc = -EINVAL;
5654 out:
5655         if (file_present)
5656                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5657
5658         if (!IS_ERR(link_name))
5659                 kfree(link_name);
5660         kfree(pathname);
5661         return rc;
5662 }
5663
5664 static int set_file_basic_info(struct ksmbd_file *fp,
5665                                struct smb2_file_basic_info *file_info,
5666                                struct ksmbd_share_config *share)
5667 {
5668         struct iattr attrs;
5669         struct file *filp;
5670         struct inode *inode;
5671         struct mnt_idmap *idmap;
5672         int rc = 0;
5673
5674         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5675                 return -EACCES;
5676
5677         attrs.ia_valid = 0;
5678         filp = fp->filp;
5679         inode = file_inode(filp);
5680         idmap = file_mnt_idmap(filp);
5681
5682         if (file_info->CreationTime)
5683                 fp->create_time = le64_to_cpu(file_info->CreationTime);
5684
5685         if (file_info->LastAccessTime) {
5686                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5687                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5688         }
5689
5690         attrs.ia_valid |= ATTR_CTIME;
5691         if (file_info->ChangeTime)
5692                 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5693         else
5694                 attrs.ia_ctime = inode_get_ctime(inode);
5695
5696         if (file_info->LastWriteTime) {
5697                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5698                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5699         }
5700
5701         if (file_info->Attributes) {
5702                 if (!S_ISDIR(inode->i_mode) &&
5703                     file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5704                         pr_err("can't change a file to a directory\n");
5705                         return -EINVAL;
5706                 }
5707
5708                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5709                         fp->f_ci->m_fattr = file_info->Attributes |
5710                                 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5711         }
5712
5713         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5714             (file_info->CreationTime || file_info->Attributes)) {
5715                 struct xattr_dos_attrib da = {0};
5716
5717                 da.version = 4;
5718                 da.itime = fp->itime;
5719                 da.create_time = fp->create_time;
5720                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5721                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5722                         XATTR_DOSINFO_ITIME;
5723
5724                 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
5725                                 true);
5726                 if (rc)
5727                         ksmbd_debug(SMB,
5728                                     "failed to restore file attribute in EA\n");
5729                 rc = 0;
5730         }
5731
5732         if (attrs.ia_valid) {
5733                 struct dentry *dentry = filp->f_path.dentry;
5734                 struct inode *inode = d_inode(dentry);
5735
5736                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5737                         return -EACCES;
5738
5739                 inode_lock(inode);
5740                 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
5741                 attrs.ia_valid &= ~ATTR_CTIME;
5742                 rc = notify_change(idmap, dentry, &attrs, NULL);
5743                 inode_unlock(inode);
5744         }
5745         return rc;
5746 }
5747
5748 static int set_file_allocation_info(struct ksmbd_work *work,
5749                                     struct ksmbd_file *fp,
5750                                     struct smb2_file_alloc_info *file_alloc_info)
5751 {
5752         /*
5753          * TODO : It's working fine only when store dos attributes
5754          * is not yes. need to implement a logic which works
5755          * properly with any smb.conf option
5756          */
5757
5758         loff_t alloc_blks;
5759         struct inode *inode;
5760         int rc;
5761
5762         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5763                 return -EACCES;
5764
5765         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5766         inode = file_inode(fp->filp);
5767
5768         if (alloc_blks > inode->i_blocks) {
5769                 smb_break_all_levII_oplock(work, fp, 1);
5770                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5771                                    alloc_blks * 512);
5772                 if (rc && rc != -EOPNOTSUPP) {
5773                         pr_err("vfs_fallocate is failed : %d\n", rc);
5774                         return rc;
5775                 }
5776         } else if (alloc_blks < inode->i_blocks) {
5777                 loff_t size;
5778
5779                 /*
5780                  * Allocation size could be smaller than original one
5781                  * which means allocated blocks in file should be
5782                  * deallocated. use truncate to cut out it, but inode
5783                  * size is also updated with truncate offset.
5784                  * inode size is retained by backup inode size.
5785                  */
5786                 size = i_size_read(inode);
5787                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5788                 if (rc) {
5789                         pr_err("truncate failed!, err %d\n", rc);
5790                         return rc;
5791                 }
5792                 if (size < alloc_blks * 512)
5793                         i_size_write(inode, size);
5794         }
5795         return 0;
5796 }
5797
5798 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5799                                 struct smb2_file_eof_info *file_eof_info)
5800 {
5801         loff_t newsize;
5802         struct inode *inode;
5803         int rc;
5804
5805         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5806                 return -EACCES;
5807
5808         newsize = le64_to_cpu(file_eof_info->EndOfFile);
5809         inode = file_inode(fp->filp);
5810
5811         /*
5812          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5813          * on FAT32 shared device, truncate execution time is too long
5814          * and network error could cause from windows client. because
5815          * truncate of some filesystem like FAT32 fill zero data in
5816          * truncated range.
5817          */
5818         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5819                 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
5820                 rc = ksmbd_vfs_truncate(work, fp, newsize);
5821                 if (rc) {
5822                         ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
5823                         if (rc != -EAGAIN)
5824                                 rc = -EBADF;
5825                         return rc;
5826                 }
5827         }
5828         return 0;
5829 }
5830
5831 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5832                            struct smb2_file_rename_info *rename_info,
5833                            unsigned int buf_len)
5834 {
5835         if (!(fp->daccess & FILE_DELETE_LE)) {
5836                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5837                 return -EACCES;
5838         }
5839
5840         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5841                         le32_to_cpu(rename_info->FileNameLength))
5842                 return -EINVAL;
5843
5844         if (!le32_to_cpu(rename_info->FileNameLength))
5845                 return -EINVAL;
5846
5847         return smb2_rename(work, fp, rename_info, work->conn->local_nls);
5848 }
5849
5850 static int set_file_disposition_info(struct ksmbd_file *fp,
5851                                      struct smb2_file_disposition_info *file_info)
5852 {
5853         struct inode *inode;
5854
5855         if (!(fp->daccess & FILE_DELETE_LE)) {
5856                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5857                 return -EACCES;
5858         }
5859
5860         inode = file_inode(fp->filp);
5861         if (file_info->DeletePending) {
5862                 if (S_ISDIR(inode->i_mode) &&
5863                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5864                         return -EBUSY;
5865                 ksmbd_set_inode_pending_delete(fp);
5866         } else {
5867                 ksmbd_clear_inode_pending_delete(fp);
5868         }
5869         return 0;
5870 }
5871
5872 static int set_file_position_info(struct ksmbd_file *fp,
5873                                   struct smb2_file_pos_info *file_info)
5874 {
5875         loff_t current_byte_offset;
5876         unsigned long sector_size;
5877         struct inode *inode;
5878
5879         inode = file_inode(fp->filp);
5880         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5881         sector_size = inode->i_sb->s_blocksize;
5882
5883         if (current_byte_offset < 0 ||
5884             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5885              current_byte_offset & (sector_size - 1))) {
5886                 pr_err("CurrentByteOffset is not valid : %llu\n",
5887                        current_byte_offset);
5888                 return -EINVAL;
5889         }
5890
5891         fp->filp->f_pos = current_byte_offset;
5892         return 0;
5893 }
5894
5895 static int set_file_mode_info(struct ksmbd_file *fp,
5896                               struct smb2_file_mode_info *file_info)
5897 {
5898         __le32 mode;
5899
5900         mode = file_info->Mode;
5901
5902         if ((mode & ~FILE_MODE_INFO_MASK)) {
5903                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5904                 return -EINVAL;
5905         }
5906
5907         /*
5908          * TODO : need to implement consideration for
5909          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5910          */
5911         ksmbd_vfs_set_fadvise(fp->filp, mode);
5912         fp->coption = mode;
5913         return 0;
5914 }
5915
5916 /**
5917  * smb2_set_info_file() - handler for smb2 set info command
5918  * @work:       smb work containing set info command buffer
5919  * @fp:         ksmbd_file pointer
5920  * @req:        request buffer pointer
5921  * @share:      ksmbd_share_config pointer
5922  *
5923  * Return:      0 on success, otherwise error
5924  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5925  */
5926 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5927                               struct smb2_set_info_req *req,
5928                               struct ksmbd_share_config *share)
5929 {
5930         unsigned int buf_len = le32_to_cpu(req->BufferLength);
5931
5932         switch (req->FileInfoClass) {
5933         case FILE_BASIC_INFORMATION:
5934         {
5935                 if (buf_len < sizeof(struct smb2_file_basic_info))
5936                         return -EINVAL;
5937
5938                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5939         }
5940         case FILE_ALLOCATION_INFORMATION:
5941         {
5942                 if (buf_len < sizeof(struct smb2_file_alloc_info))
5943                         return -EINVAL;
5944
5945                 return set_file_allocation_info(work, fp,
5946                                                 (struct smb2_file_alloc_info *)req->Buffer);
5947         }
5948         case FILE_END_OF_FILE_INFORMATION:
5949         {
5950                 if (buf_len < sizeof(struct smb2_file_eof_info))
5951                         return -EINVAL;
5952
5953                 return set_end_of_file_info(work, fp,
5954                                             (struct smb2_file_eof_info *)req->Buffer);
5955         }
5956         case FILE_RENAME_INFORMATION:
5957         {
5958                 if (buf_len < sizeof(struct smb2_file_rename_info))
5959                         return -EINVAL;
5960
5961                 return set_rename_info(work, fp,
5962                                        (struct smb2_file_rename_info *)req->Buffer,
5963                                        buf_len);
5964         }
5965         case FILE_LINK_INFORMATION:
5966         {
5967                 if (buf_len < sizeof(struct smb2_file_link_info))
5968                         return -EINVAL;
5969
5970                 return smb2_create_link(work, work->tcon->share_conf,
5971                                         (struct smb2_file_link_info *)req->Buffer,
5972                                         buf_len, fp->filp,
5973                                         work->conn->local_nls);
5974         }
5975         case FILE_DISPOSITION_INFORMATION:
5976         {
5977                 if (buf_len < sizeof(struct smb2_file_disposition_info))
5978                         return -EINVAL;
5979
5980                 return set_file_disposition_info(fp,
5981                                                  (struct smb2_file_disposition_info *)req->Buffer);
5982         }
5983         case FILE_FULL_EA_INFORMATION:
5984         {
5985                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5986                         pr_err("Not permitted to write ext  attr: 0x%x\n",
5987                                fp->daccess);
5988                         return -EACCES;
5989                 }
5990
5991                 if (buf_len < sizeof(struct smb2_ea_info))
5992                         return -EINVAL;
5993
5994                 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5995                                    buf_len, &fp->filp->f_path);
5996         }
5997         case FILE_POSITION_INFORMATION:
5998         {
5999                 if (buf_len < sizeof(struct smb2_file_pos_info))
6000                         return -EINVAL;
6001
6002                 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
6003         }
6004         case FILE_MODE_INFORMATION:
6005         {
6006                 if (buf_len < sizeof(struct smb2_file_mode_info))
6007                         return -EINVAL;
6008
6009                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
6010         }
6011         }
6012
6013         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6014         return -EOPNOTSUPP;
6015 }
6016
6017 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6018                              char *buffer, int buf_len)
6019 {
6020         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6021
6022         fp->saccess |= FILE_SHARE_DELETE_LE;
6023
6024         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6025                         buf_len, false, true);
6026 }
6027
6028 /**
6029  * smb2_set_info() - handler for smb2 set info command handler
6030  * @work:       smb work containing set info request buffer
6031  *
6032  * Return:      0 on success, otherwise error
6033  */
6034 int smb2_set_info(struct ksmbd_work *work)
6035 {
6036         struct smb2_set_info_req *req;
6037         struct smb2_set_info_rsp *rsp;
6038         struct ksmbd_file *fp = NULL;
6039         int rc = 0;
6040         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6041
6042         ksmbd_debug(SMB, "Received set info request\n");
6043
6044         if (work->next_smb2_rcv_hdr_off) {
6045                 req = ksmbd_req_buf_next(work);
6046                 rsp = ksmbd_resp_buf_next(work);
6047                 if (!has_file_id(req->VolatileFileId)) {
6048                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6049                                     work->compound_fid);
6050                         id = work->compound_fid;
6051                         pid = work->compound_pfid;
6052                 }
6053         } else {
6054                 req = smb2_get_msg(work->request_buf);
6055                 rsp = smb2_get_msg(work->response_buf);
6056         }
6057
6058         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6059                 ksmbd_debug(SMB, "User does not have write permission\n");
6060                 pr_err("User does not have write permission\n");
6061                 rc = -EACCES;
6062                 goto err_out;
6063         }
6064
6065         if (!has_file_id(id)) {
6066                 id = req->VolatileFileId;
6067                 pid = req->PersistentFileId;
6068         }
6069
6070         fp = ksmbd_lookup_fd_slow(work, id, pid);
6071         if (!fp) {
6072                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6073                 rc = -ENOENT;
6074                 goto err_out;
6075         }
6076
6077         switch (req->InfoType) {
6078         case SMB2_O_INFO_FILE:
6079                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6080                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6081                 break;
6082         case SMB2_O_INFO_SECURITY:
6083                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6084                 if (ksmbd_override_fsids(work)) {
6085                         rc = -ENOMEM;
6086                         goto err_out;
6087                 }
6088                 rc = smb2_set_info_sec(fp,
6089                                        le32_to_cpu(req->AdditionalInformation),
6090                                        req->Buffer,
6091                                        le32_to_cpu(req->BufferLength));
6092                 ksmbd_revert_fsids(work);
6093                 break;
6094         default:
6095                 rc = -EOPNOTSUPP;
6096         }
6097
6098         if (rc < 0)
6099                 goto err_out;
6100
6101         rsp->StructureSize = cpu_to_le16(2);
6102         rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6103                                sizeof(struct smb2_set_info_rsp));
6104         if (rc)
6105                 goto err_out;
6106         ksmbd_fd_put(work, fp);
6107         return 0;
6108
6109 err_out:
6110         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6111                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6112         else if (rc == -EINVAL)
6113                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6114         else if (rc == -ESHARE)
6115                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6116         else if (rc == -ENOENT)
6117                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6118         else if (rc == -EBUSY || rc == -ENOTEMPTY)
6119                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6120         else if (rc == -EAGAIN)
6121                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6122         else if (rc == -EBADF || rc == -ESTALE)
6123                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6124         else if (rc == -EEXIST)
6125                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6126         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6127                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6128         smb2_set_err_rsp(work);
6129         ksmbd_fd_put(work, fp);
6130         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6131         return rc;
6132 }
6133
6134 /**
6135  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6136  * @work:       smb work containing read IPC pipe command buffer
6137  *
6138  * Return:      0 on success, otherwise error
6139  */
6140 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6141 {
6142         int nbytes = 0, err;
6143         u64 id;
6144         struct ksmbd_rpc_command *rpc_resp;
6145         struct smb2_read_req *req;
6146         struct smb2_read_rsp *rsp;
6147
6148         WORK_BUFFERS(work, req, rsp);
6149
6150         id = req->VolatileFileId;
6151
6152         rpc_resp = ksmbd_rpc_read(work->sess, id);
6153         if (rpc_resp) {
6154                 void *aux_payload_buf;
6155
6156                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6157                         err = -EINVAL;
6158                         goto out;
6159                 }
6160
6161                 aux_payload_buf =
6162                         kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6163                 if (!aux_payload_buf) {
6164                         err = -ENOMEM;
6165                         goto out;
6166                 }
6167
6168                 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6169
6170                 nbytes = rpc_resp->payload_sz;
6171                 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6172                                              offsetof(struct smb2_read_rsp, Buffer),
6173                                              aux_payload_buf, nbytes);
6174                 if (err)
6175                         goto out;
6176                 kvfree(rpc_resp);
6177         } else {
6178                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6179                                         offsetof(struct smb2_read_rsp, Buffer));
6180                 if (err)
6181                         goto out;
6182         }
6183
6184         rsp->StructureSize = cpu_to_le16(17);
6185         rsp->DataOffset = 80;
6186         rsp->Reserved = 0;
6187         rsp->DataLength = cpu_to_le32(nbytes);
6188         rsp->DataRemaining = 0;
6189         rsp->Flags = 0;
6190         return 0;
6191
6192 out:
6193         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6194         smb2_set_err_rsp(work);
6195         kvfree(rpc_resp);
6196         return err;
6197 }
6198
6199 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6200                                         struct smb2_buffer_desc_v1 *desc,
6201                                         __le32 Channel,
6202                                         __le16 ChannelInfoLength)
6203 {
6204         unsigned int i, ch_count;
6205
6206         if (work->conn->dialect == SMB30_PROT_ID &&
6207             Channel != SMB2_CHANNEL_RDMA_V1)
6208                 return -EINVAL;
6209
6210         ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6211         if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6212                 for (i = 0; i < ch_count; i++) {
6213                         pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6214                                 i,
6215                                 le32_to_cpu(desc[i].token),
6216                                 le32_to_cpu(desc[i].length));
6217                 }
6218         }
6219         if (!ch_count)
6220                 return -EINVAL;
6221
6222         work->need_invalidate_rkey =
6223                 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6224         if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6225                 work->remote_key = le32_to_cpu(desc->token);
6226         return 0;
6227 }
6228
6229 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6230                                       struct smb2_read_req *req, void *data_buf,
6231                                       size_t length)
6232 {
6233         int err;
6234
6235         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6236                                     (struct smb2_buffer_desc_v1 *)
6237                                     ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6238                                     le16_to_cpu(req->ReadChannelInfoLength));
6239         if (err)
6240                 return err;
6241
6242         return length;
6243 }
6244
6245 /**
6246  * smb2_read() - handler for smb2 read from file
6247  * @work:       smb work containing read command buffer
6248  *
6249  * Return:      0 on success, otherwise error
6250  */
6251 int smb2_read(struct ksmbd_work *work)
6252 {
6253         struct ksmbd_conn *conn = work->conn;
6254         struct smb2_read_req *req;
6255         struct smb2_read_rsp *rsp;
6256         struct ksmbd_file *fp = NULL;
6257         loff_t offset;
6258         size_t length, mincount;
6259         ssize_t nbytes = 0, remain_bytes = 0;
6260         int err = 0;
6261         bool is_rdma_channel = false;
6262         unsigned int max_read_size = conn->vals->max_read_size;
6263         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6264         void *aux_payload_buf;
6265
6266         if (test_share_config_flag(work->tcon->share_conf,
6267                                    KSMBD_SHARE_FLAG_PIPE)) {
6268                 ksmbd_debug(SMB, "IPC pipe read request\n");
6269                 return smb2_read_pipe(work);
6270         }
6271
6272         if (work->next_smb2_rcv_hdr_off) {
6273                 req = ksmbd_req_buf_next(work);
6274                 rsp = ksmbd_resp_buf_next(work);
6275                 if (!has_file_id(req->VolatileFileId)) {
6276                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6277                                         work->compound_fid);
6278                         id = work->compound_fid;
6279                         pid = work->compound_pfid;
6280                 }
6281         } else {
6282                 req = smb2_get_msg(work->request_buf);
6283                 rsp = smb2_get_msg(work->response_buf);
6284         }
6285
6286         if (!has_file_id(id)) {
6287                 id = req->VolatileFileId;
6288                 pid = req->PersistentFileId;
6289         }
6290
6291         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6292             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6293                 is_rdma_channel = true;
6294                 max_read_size = get_smbd_max_read_write_size();
6295         }
6296
6297         if (is_rdma_channel == true) {
6298                 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6299
6300                 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6301                         err = -EINVAL;
6302                         goto out;
6303                 }
6304                 err = smb2_set_remote_key_for_rdma(work,
6305                                                    (struct smb2_buffer_desc_v1 *)
6306                                                    ((char *)req + ch_offset),
6307                                                    req->Channel,
6308                                                    req->ReadChannelInfoLength);
6309                 if (err)
6310                         goto out;
6311         }
6312
6313         fp = ksmbd_lookup_fd_slow(work, id, pid);
6314         if (!fp) {
6315                 err = -ENOENT;
6316                 goto out;
6317         }
6318
6319         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6320                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6321                 err = -EACCES;
6322                 goto out;
6323         }
6324
6325         offset = le64_to_cpu(req->Offset);
6326         length = le32_to_cpu(req->Length);
6327         mincount = le32_to_cpu(req->MinimumCount);
6328
6329         if (length > max_read_size) {
6330                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6331                             max_read_size);
6332                 err = -EINVAL;
6333                 goto out;
6334         }
6335
6336         ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6337                     fp->filp, offset, length);
6338
6339         aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6340         if (!aux_payload_buf) {
6341                 err = -ENOMEM;
6342                 goto out;
6343         }
6344
6345         nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6346         if (nbytes < 0) {
6347                 err = nbytes;
6348                 goto out;
6349         }
6350
6351         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6352                 kvfree(aux_payload_buf);
6353                 rsp->hdr.Status = STATUS_END_OF_FILE;
6354                 smb2_set_err_rsp(work);
6355                 ksmbd_fd_put(work, fp);
6356                 return 0;
6357         }
6358
6359         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6360                     nbytes, offset, mincount);
6361
6362         if (is_rdma_channel == true) {
6363                 /* write data to the client using rdma channel */
6364                 remain_bytes = smb2_read_rdma_channel(work, req,
6365                                                       aux_payload_buf,
6366                                                       nbytes);
6367                 kvfree(aux_payload_buf);
6368                 aux_payload_buf = NULL;
6369                 nbytes = 0;
6370                 if (remain_bytes < 0) {
6371                         err = (int)remain_bytes;
6372                         goto out;
6373                 }
6374         }
6375
6376         rsp->StructureSize = cpu_to_le16(17);
6377         rsp->DataOffset = 80;
6378         rsp->Reserved = 0;
6379         rsp->DataLength = cpu_to_le32(nbytes);
6380         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6381         rsp->Flags = 0;
6382         err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6383                                      offsetof(struct smb2_read_rsp, Buffer),
6384                                      aux_payload_buf, nbytes);
6385         if (err)
6386                 goto out;
6387         ksmbd_fd_put(work, fp);
6388         return 0;
6389
6390 out:
6391         if (err) {
6392                 if (err == -EISDIR)
6393                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6394                 else if (err == -EAGAIN)
6395                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6396                 else if (err == -ENOENT)
6397                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6398                 else if (err == -EACCES)
6399                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6400                 else if (err == -ESHARE)
6401                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6402                 else if (err == -EINVAL)
6403                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6404                 else
6405                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6406
6407                 smb2_set_err_rsp(work);
6408         }
6409         ksmbd_fd_put(work, fp);
6410         return err;
6411 }
6412
6413 /**
6414  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6415  * @work:       smb work containing write IPC pipe command buffer
6416  *
6417  * Return:      0 on success, otherwise error
6418  */
6419 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6420 {
6421         struct smb2_write_req *req;
6422         struct smb2_write_rsp *rsp;
6423         struct ksmbd_rpc_command *rpc_resp;
6424         u64 id = 0;
6425         int err = 0, ret = 0;
6426         char *data_buf;
6427         size_t length;
6428
6429         WORK_BUFFERS(work, req, rsp);
6430
6431         length = le32_to_cpu(req->Length);
6432         id = req->VolatileFileId;
6433
6434         if ((u64)le16_to_cpu(req->DataOffset) + length >
6435             get_rfc1002_len(work->request_buf)) {
6436                 pr_err("invalid write data offset %u, smb_len %u\n",
6437                        le16_to_cpu(req->DataOffset),
6438                        get_rfc1002_len(work->request_buf));
6439                 err = -EINVAL;
6440                 goto out;
6441         }
6442
6443         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6444                            le16_to_cpu(req->DataOffset));
6445
6446         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6447         if (rpc_resp) {
6448                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6449                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6450                         kvfree(rpc_resp);
6451                         smb2_set_err_rsp(work);
6452                         return -EOPNOTSUPP;
6453                 }
6454                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6455                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6456                         smb2_set_err_rsp(work);
6457                         kvfree(rpc_resp);
6458                         return ret;
6459                 }
6460                 kvfree(rpc_resp);
6461         }
6462
6463         rsp->StructureSize = cpu_to_le16(17);
6464         rsp->DataOffset = 0;
6465         rsp->Reserved = 0;
6466         rsp->DataLength = cpu_to_le32(length);
6467         rsp->DataRemaining = 0;
6468         rsp->Reserved2 = 0;
6469         err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6470                                 offsetof(struct smb2_write_rsp, Buffer));
6471 out:
6472         if (err) {
6473                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6474                 smb2_set_err_rsp(work);
6475         }
6476
6477         return err;
6478 }
6479
6480 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6481                                        struct smb2_write_req *req,
6482                                        struct ksmbd_file *fp,
6483                                        loff_t offset, size_t length, bool sync)
6484 {
6485         char *data_buf;
6486         int ret;
6487         ssize_t nbytes;
6488
6489         data_buf = kvzalloc(length, GFP_KERNEL);
6490         if (!data_buf)
6491                 return -ENOMEM;
6492
6493         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6494                                    (struct smb2_buffer_desc_v1 *)
6495                                    ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6496                                    le16_to_cpu(req->WriteChannelInfoLength));
6497         if (ret < 0) {
6498                 kvfree(data_buf);
6499                 return ret;
6500         }
6501
6502         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6503         kvfree(data_buf);
6504         if (ret < 0)
6505                 return ret;
6506
6507         return nbytes;
6508 }
6509
6510 /**
6511  * smb2_write() - handler for smb2 write from file
6512  * @work:       smb work containing write command buffer
6513  *
6514  * Return:      0 on success, otherwise error
6515  */
6516 int smb2_write(struct ksmbd_work *work)
6517 {
6518         struct smb2_write_req *req;
6519         struct smb2_write_rsp *rsp;
6520         struct ksmbd_file *fp = NULL;
6521         loff_t offset;
6522         size_t length;
6523         ssize_t nbytes;
6524         char *data_buf;
6525         bool writethrough = false, is_rdma_channel = false;
6526         int err = 0;
6527         unsigned int max_write_size = work->conn->vals->max_write_size;
6528
6529         WORK_BUFFERS(work, req, rsp);
6530
6531         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6532                 ksmbd_debug(SMB, "IPC pipe write request\n");
6533                 return smb2_write_pipe(work);
6534         }
6535
6536         offset = le64_to_cpu(req->Offset);
6537         length = le32_to_cpu(req->Length);
6538
6539         if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6540             req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6541                 is_rdma_channel = true;
6542                 max_write_size = get_smbd_max_read_write_size();
6543                 length = le32_to_cpu(req->RemainingBytes);
6544         }
6545
6546         if (is_rdma_channel == true) {
6547                 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6548
6549                 if (req->Length != 0 || req->DataOffset != 0 ||
6550                     ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6551                         err = -EINVAL;
6552                         goto out;
6553                 }
6554                 err = smb2_set_remote_key_for_rdma(work,
6555                                                    (struct smb2_buffer_desc_v1 *)
6556                                                    ((char *)req + ch_offset),
6557                                                    req->Channel,
6558                                                    req->WriteChannelInfoLength);
6559                 if (err)
6560                         goto out;
6561         }
6562
6563         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6564                 ksmbd_debug(SMB, "User does not have write permission\n");
6565                 err = -EACCES;
6566                 goto out;
6567         }
6568
6569         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6570         if (!fp) {
6571                 err = -ENOENT;
6572                 goto out;
6573         }
6574
6575         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6576                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6577                 err = -EACCES;
6578                 goto out;
6579         }
6580
6581         if (length > max_write_size) {
6582                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6583                             max_write_size);
6584                 err = -EINVAL;
6585                 goto out;
6586         }
6587
6588         ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6589         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6590                 writethrough = true;
6591
6592         if (is_rdma_channel == false) {
6593                 if (le16_to_cpu(req->DataOffset) <
6594                     offsetof(struct smb2_write_req, Buffer)) {
6595                         err = -EINVAL;
6596                         goto out;
6597                 }
6598
6599                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6600                                     le16_to_cpu(req->DataOffset));
6601
6602                 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6603                             fp->filp, offset, length);
6604                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6605                                       writethrough, &nbytes);
6606                 if (err < 0)
6607                         goto out;
6608         } else {
6609                 /* read data from the client using rdma channel, and
6610                  * write the data.
6611                  */
6612                 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6613                                                  writethrough);
6614                 if (nbytes < 0) {
6615                         err = (int)nbytes;
6616                         goto out;
6617                 }
6618         }
6619
6620         rsp->StructureSize = cpu_to_le16(17);
6621         rsp->DataOffset = 0;
6622         rsp->Reserved = 0;
6623         rsp->DataLength = cpu_to_le32(nbytes);
6624         rsp->DataRemaining = 0;
6625         rsp->Reserved2 = 0;
6626         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6627         if (err)
6628                 goto out;
6629         ksmbd_fd_put(work, fp);
6630         return 0;
6631
6632 out:
6633         if (err == -EAGAIN)
6634                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6635         else if (err == -ENOSPC || err == -EFBIG)
6636                 rsp->hdr.Status = STATUS_DISK_FULL;
6637         else if (err == -ENOENT)
6638                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6639         else if (err == -EACCES)
6640                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6641         else if (err == -ESHARE)
6642                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6643         else if (err == -EINVAL)
6644                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6645         else
6646                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6647
6648         smb2_set_err_rsp(work);
6649         ksmbd_fd_put(work, fp);
6650         return err;
6651 }
6652
6653 /**
6654  * smb2_flush() - handler for smb2 flush file - fsync
6655  * @work:       smb work containing flush command buffer
6656  *
6657  * Return:      0 on success, otherwise error
6658  */
6659 int smb2_flush(struct ksmbd_work *work)
6660 {
6661         struct smb2_flush_req *req;
6662         struct smb2_flush_rsp *rsp;
6663         int err;
6664
6665         WORK_BUFFERS(work, req, rsp);
6666
6667         ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6668
6669         err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6670         if (err)
6671                 goto out;
6672
6673         rsp->StructureSize = cpu_to_le16(4);
6674         rsp->Reserved = 0;
6675         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
6676
6677 out:
6678         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6679         smb2_set_err_rsp(work);
6680         return err;
6681 }
6682
6683 /**
6684  * smb2_cancel() - handler for smb2 cancel command
6685  * @work:       smb work containing cancel command buffer
6686  *
6687  * Return:      0 on success, otherwise error
6688  */
6689 int smb2_cancel(struct ksmbd_work *work)
6690 {
6691         struct ksmbd_conn *conn = work->conn;
6692         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6693         struct smb2_hdr *chdr;
6694         struct ksmbd_work *iter;
6695         struct list_head *command_list;
6696
6697         if (work->next_smb2_rcv_hdr_off)
6698                 hdr = ksmbd_resp_buf_next(work);
6699
6700         ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6701                     hdr->MessageId, hdr->Flags);
6702
6703         if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6704                 command_list = &conn->async_requests;
6705
6706                 spin_lock(&conn->request_lock);
6707                 list_for_each_entry(iter, command_list,
6708                                     async_request_entry) {
6709                         chdr = smb2_get_msg(iter->request_buf);
6710
6711                         if (iter->async_id !=
6712                             le64_to_cpu(hdr->Id.AsyncId))
6713                                 continue;
6714
6715                         ksmbd_debug(SMB,
6716                                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6717                                     le64_to_cpu(hdr->Id.AsyncId),
6718                                     le16_to_cpu(chdr->Command));
6719                         iter->state = KSMBD_WORK_CANCELLED;
6720                         if (iter->cancel_fn)
6721                                 iter->cancel_fn(iter->cancel_argv);
6722                         break;
6723                 }
6724                 spin_unlock(&conn->request_lock);
6725         } else {
6726                 command_list = &conn->requests;
6727
6728                 spin_lock(&conn->request_lock);
6729                 list_for_each_entry(iter, command_list, request_entry) {
6730                         chdr = smb2_get_msg(iter->request_buf);
6731
6732                         if (chdr->MessageId != hdr->MessageId ||
6733                             iter == work)
6734                                 continue;
6735
6736                         ksmbd_debug(SMB,
6737                                     "smb2 with mid %llu cancelled command = 0x%x\n",
6738                                     le64_to_cpu(hdr->MessageId),
6739                                     le16_to_cpu(chdr->Command));
6740                         iter->state = KSMBD_WORK_CANCELLED;
6741                         break;
6742                 }
6743                 spin_unlock(&conn->request_lock);
6744         }
6745
6746         /* For SMB2_CANCEL command itself send no response*/
6747         work->send_no_response = 1;
6748         return 0;
6749 }
6750
6751 struct file_lock *smb_flock_init(struct file *f)
6752 {
6753         struct file_lock *fl;
6754
6755         fl = locks_alloc_lock();
6756         if (!fl)
6757                 goto out;
6758
6759         locks_init_lock(fl);
6760
6761         fl->fl_owner = f;
6762         fl->fl_pid = current->tgid;
6763         fl->fl_file = f;
6764         fl->fl_flags = FL_POSIX;
6765         fl->fl_ops = NULL;
6766         fl->fl_lmops = NULL;
6767
6768 out:
6769         return fl;
6770 }
6771
6772 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6773 {
6774         int cmd = -EINVAL;
6775
6776         /* Checking for wrong flag combination during lock request*/
6777         switch (flags) {
6778         case SMB2_LOCKFLAG_SHARED:
6779                 ksmbd_debug(SMB, "received shared request\n");
6780                 cmd = F_SETLKW;
6781                 flock->fl_type = F_RDLCK;
6782                 flock->fl_flags |= FL_SLEEP;
6783                 break;
6784         case SMB2_LOCKFLAG_EXCLUSIVE:
6785                 ksmbd_debug(SMB, "received exclusive request\n");
6786                 cmd = F_SETLKW;
6787                 flock->fl_type = F_WRLCK;
6788                 flock->fl_flags |= FL_SLEEP;
6789                 break;
6790         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6791                 ksmbd_debug(SMB,
6792                             "received shared & fail immediately request\n");
6793                 cmd = F_SETLK;
6794                 flock->fl_type = F_RDLCK;
6795                 break;
6796         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6797                 ksmbd_debug(SMB,
6798                             "received exclusive & fail immediately request\n");
6799                 cmd = F_SETLK;
6800                 flock->fl_type = F_WRLCK;
6801                 break;
6802         case SMB2_LOCKFLAG_UNLOCK:
6803                 ksmbd_debug(SMB, "received unlock request\n");
6804                 flock->fl_type = F_UNLCK;
6805                 cmd = F_SETLK;
6806                 break;
6807         }
6808
6809         return cmd;
6810 }
6811
6812 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6813                                          unsigned int cmd, int flags,
6814                                          struct list_head *lock_list)
6815 {
6816         struct ksmbd_lock *lock;
6817
6818         lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6819         if (!lock)
6820                 return NULL;
6821
6822         lock->cmd = cmd;
6823         lock->fl = flock;
6824         lock->start = flock->fl_start;
6825         lock->end = flock->fl_end;
6826         lock->flags = flags;
6827         if (lock->start == lock->end)
6828                 lock->zero_len = 1;
6829         INIT_LIST_HEAD(&lock->clist);
6830         INIT_LIST_HEAD(&lock->flist);
6831         INIT_LIST_HEAD(&lock->llist);
6832         list_add_tail(&lock->llist, lock_list);
6833
6834         return lock;
6835 }
6836
6837 static void smb2_remove_blocked_lock(void **argv)
6838 {
6839         struct file_lock *flock = (struct file_lock *)argv[0];
6840
6841         ksmbd_vfs_posix_lock_unblock(flock);
6842         wake_up(&flock->fl_wait);
6843 }
6844
6845 static inline bool lock_defer_pending(struct file_lock *fl)
6846 {
6847         /* check pending lock waiters */
6848         return waitqueue_active(&fl->fl_wait);
6849 }
6850
6851 /**
6852  * smb2_lock() - handler for smb2 file lock command
6853  * @work:       smb work containing lock command buffer
6854  *
6855  * Return:      0 on success, otherwise error
6856  */
6857 int smb2_lock(struct ksmbd_work *work)
6858 {
6859         struct smb2_lock_req *req;
6860         struct smb2_lock_rsp *rsp;
6861         struct smb2_lock_element *lock_ele;
6862         struct ksmbd_file *fp = NULL;
6863         struct file_lock *flock = NULL;
6864         struct file *filp = NULL;
6865         int lock_count;
6866         int flags = 0;
6867         int cmd = 0;
6868         int err = -EIO, i, rc = 0;
6869         u64 lock_start, lock_length;
6870         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6871         struct ksmbd_conn *conn;
6872         int nolock = 0;
6873         LIST_HEAD(lock_list);
6874         LIST_HEAD(rollback_list);
6875         int prior_lock = 0;
6876
6877         WORK_BUFFERS(work, req, rsp);
6878
6879         ksmbd_debug(SMB, "Received lock request\n");
6880         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6881         if (!fp) {
6882                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
6883                 err = -ENOENT;
6884                 goto out2;
6885         }
6886
6887         filp = fp->filp;
6888         lock_count = le16_to_cpu(req->LockCount);
6889         lock_ele = req->locks;
6890
6891         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6892         if (!lock_count) {
6893                 err = -EINVAL;
6894                 goto out2;
6895         }
6896
6897         for (i = 0; i < lock_count; i++) {
6898                 flags = le32_to_cpu(lock_ele[i].Flags);
6899
6900                 flock = smb_flock_init(filp);
6901                 if (!flock)
6902                         goto out;
6903
6904                 cmd = smb2_set_flock_flags(flock, flags);
6905
6906                 lock_start = le64_to_cpu(lock_ele[i].Offset);
6907                 lock_length = le64_to_cpu(lock_ele[i].Length);
6908                 if (lock_start > U64_MAX - lock_length) {
6909                         pr_err("Invalid lock range requested\n");
6910                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6911                         locks_free_lock(flock);
6912                         goto out;
6913                 }
6914
6915                 if (lock_start > OFFSET_MAX)
6916                         flock->fl_start = OFFSET_MAX;
6917                 else
6918                         flock->fl_start = lock_start;
6919
6920                 lock_length = le64_to_cpu(lock_ele[i].Length);
6921                 if (lock_length > OFFSET_MAX - flock->fl_start)
6922                         lock_length = OFFSET_MAX - flock->fl_start;
6923
6924                 flock->fl_end = flock->fl_start + lock_length;
6925
6926                 if (flock->fl_end < flock->fl_start) {
6927                         ksmbd_debug(SMB,
6928                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
6929                                     flock->fl_end, flock->fl_start);
6930                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6931                         locks_free_lock(flock);
6932                         goto out;
6933                 }
6934
6935                 /* Check conflict locks in one request */
6936                 list_for_each_entry(cmp_lock, &lock_list, llist) {
6937                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
6938                             cmp_lock->fl->fl_end >= flock->fl_end) {
6939                                 if (cmp_lock->fl->fl_type != F_UNLCK &&
6940                                     flock->fl_type != F_UNLCK) {
6941                                         pr_err("conflict two locks in one request\n");
6942                                         err = -EINVAL;
6943                                         locks_free_lock(flock);
6944                                         goto out;
6945                                 }
6946                         }
6947                 }
6948
6949                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6950                 if (!smb_lock) {
6951                         err = -EINVAL;
6952                         locks_free_lock(flock);
6953                         goto out;
6954                 }
6955         }
6956
6957         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6958                 if (smb_lock->cmd < 0) {
6959                         err = -EINVAL;
6960                         goto out;
6961                 }
6962
6963                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6964                         err = -EINVAL;
6965                         goto out;
6966                 }
6967
6968                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6969                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6970                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6971                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6972                         err = -EINVAL;
6973                         goto out;
6974                 }
6975
6976                 prior_lock = smb_lock->flags;
6977
6978                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6979                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6980                         goto no_check_cl;
6981
6982                 nolock = 1;
6983                 /* check locks in connection list */
6984                 down_read(&conn_list_lock);
6985                 list_for_each_entry(conn, &conn_list, conns_list) {
6986                         spin_lock(&conn->llist_lock);
6987                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6988                                 if (file_inode(cmp_lock->fl->fl_file) !=
6989                                     file_inode(smb_lock->fl->fl_file))
6990                                         continue;
6991
6992                                 if (smb_lock->fl->fl_type == F_UNLCK) {
6993                                         if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6994                                             cmp_lock->start == smb_lock->start &&
6995                                             cmp_lock->end == smb_lock->end &&
6996                                             !lock_defer_pending(cmp_lock->fl)) {
6997                                                 nolock = 0;
6998                                                 list_del(&cmp_lock->flist);
6999                                                 list_del(&cmp_lock->clist);
7000                                                 spin_unlock(&conn->llist_lock);
7001                                                 up_read(&conn_list_lock);
7002
7003                                                 locks_free_lock(cmp_lock->fl);
7004                                                 kfree(cmp_lock);
7005                                                 goto out_check_cl;
7006                                         }
7007                                         continue;
7008                                 }
7009
7010                                 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
7011                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7012                                                 continue;
7013                                 } else {
7014                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7015                                                 continue;
7016                                 }
7017
7018                                 /* check zero byte lock range */
7019                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7020                                     cmp_lock->start > smb_lock->start &&
7021                                     cmp_lock->start < smb_lock->end) {
7022                                         spin_unlock(&conn->llist_lock);
7023                                         up_read(&conn_list_lock);
7024                                         pr_err("previous lock conflict with zero byte lock range\n");
7025                                         goto out;
7026                                 }
7027
7028                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7029                                     smb_lock->start > cmp_lock->start &&
7030                                     smb_lock->start < cmp_lock->end) {
7031                                         spin_unlock(&conn->llist_lock);
7032                                         up_read(&conn_list_lock);
7033                                         pr_err("current lock conflict with zero byte lock range\n");
7034                                         goto out;
7035                                 }
7036
7037                                 if (((cmp_lock->start <= smb_lock->start &&
7038                                       cmp_lock->end > smb_lock->start) ||
7039                                      (cmp_lock->start < smb_lock->end &&
7040                                       cmp_lock->end >= smb_lock->end)) &&
7041                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
7042                                         spin_unlock(&conn->llist_lock);
7043                                         up_read(&conn_list_lock);
7044                                         pr_err("Not allow lock operation on exclusive lock range\n");
7045                                         goto out;
7046                                 }
7047                         }
7048                         spin_unlock(&conn->llist_lock);
7049                 }
7050                 up_read(&conn_list_lock);
7051 out_check_cl:
7052                 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
7053                         pr_err("Try to unlock nolocked range\n");
7054                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7055                         goto out;
7056                 }
7057
7058 no_check_cl:
7059                 if (smb_lock->zero_len) {
7060                         err = 0;
7061                         goto skip;
7062                 }
7063
7064                 flock = smb_lock->fl;
7065                 list_del(&smb_lock->llist);
7066 retry:
7067                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7068 skip:
7069                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7070                         if (!rc) {
7071                                 ksmbd_debug(SMB, "File unlocked\n");
7072                         } else if (rc == -ENOENT) {
7073                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
7074                                 goto out;
7075                         }
7076                         locks_free_lock(flock);
7077                         kfree(smb_lock);
7078                 } else {
7079                         if (rc == FILE_LOCK_DEFERRED) {
7080                                 void **argv;
7081
7082                                 ksmbd_debug(SMB,
7083                                             "would have to wait for getting lock\n");
7084                                 list_add(&smb_lock->llist, &rollback_list);
7085
7086                                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7087                                 if (!argv) {
7088                                         err = -ENOMEM;
7089                                         goto out;
7090                                 }
7091                                 argv[0] = flock;
7092
7093                                 rc = setup_async_work(work,
7094                                                       smb2_remove_blocked_lock,
7095                                                       argv);
7096                                 if (rc) {
7097                                         kfree(argv);
7098                                         err = -ENOMEM;
7099                                         goto out;
7100                                 }
7101                                 spin_lock(&fp->f_lock);
7102                                 list_add(&work->fp_entry, &fp->blocked_works);
7103                                 spin_unlock(&fp->f_lock);
7104
7105                                 smb2_send_interim_resp(work, STATUS_PENDING);
7106
7107                                 ksmbd_vfs_posix_lock_wait(flock);
7108
7109                                 spin_lock(&fp->f_lock);
7110                                 list_del(&work->fp_entry);
7111                                 spin_unlock(&fp->f_lock);
7112
7113                                 if (work->state != KSMBD_WORK_ACTIVE) {
7114                                         list_del(&smb_lock->llist);
7115                                         locks_free_lock(flock);
7116
7117                                         if (work->state == KSMBD_WORK_CANCELLED) {
7118                                                 rsp->hdr.Status =
7119                                                         STATUS_CANCELLED;
7120                                                 kfree(smb_lock);
7121                                                 smb2_send_interim_resp(work,
7122                                                                        STATUS_CANCELLED);
7123                                                 work->send_no_response = 1;
7124                                                 goto out;
7125                                         }
7126
7127                                         rsp->hdr.Status =
7128                                                 STATUS_RANGE_NOT_LOCKED;
7129                                         kfree(smb_lock);
7130                                         goto out2;
7131                                 }
7132
7133                                 list_del(&smb_lock->llist);
7134                                 release_async_work(work);
7135                                 goto retry;
7136                         } else if (!rc) {
7137                                 list_add(&smb_lock->llist, &rollback_list);
7138                                 spin_lock(&work->conn->llist_lock);
7139                                 list_add_tail(&smb_lock->clist,
7140                                               &work->conn->lock_list);
7141                                 list_add_tail(&smb_lock->flist,
7142                                               &fp->lock_list);
7143                                 spin_unlock(&work->conn->llist_lock);
7144                                 ksmbd_debug(SMB, "successful in taking lock\n");
7145                         } else {
7146                                 goto out;
7147                         }
7148                 }
7149         }
7150
7151         if (atomic_read(&fp->f_ci->op_count) > 1)
7152                 smb_break_all_oplock(work, fp);
7153
7154         rsp->StructureSize = cpu_to_le16(4);
7155         ksmbd_debug(SMB, "successful in taking lock\n");
7156         rsp->hdr.Status = STATUS_SUCCESS;
7157         rsp->Reserved = 0;
7158         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7159         if (err)
7160                 goto out;
7161
7162         ksmbd_fd_put(work, fp);
7163         return 0;
7164
7165 out:
7166         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7167                 locks_free_lock(smb_lock->fl);
7168                 list_del(&smb_lock->llist);
7169                 kfree(smb_lock);
7170         }
7171
7172         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7173                 struct file_lock *rlock = NULL;
7174
7175                 rlock = smb_flock_init(filp);
7176                 rlock->fl_type = F_UNLCK;
7177                 rlock->fl_start = smb_lock->start;
7178                 rlock->fl_end = smb_lock->end;
7179
7180                 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7181                 if (rc)
7182                         pr_err("rollback unlock fail : %d\n", rc);
7183
7184                 list_del(&smb_lock->llist);
7185                 spin_lock(&work->conn->llist_lock);
7186                 if (!list_empty(&smb_lock->flist))
7187                         list_del(&smb_lock->flist);
7188                 list_del(&smb_lock->clist);
7189                 spin_unlock(&work->conn->llist_lock);
7190
7191                 locks_free_lock(smb_lock->fl);
7192                 locks_free_lock(rlock);
7193                 kfree(smb_lock);
7194         }
7195 out2:
7196         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7197
7198         if (!rsp->hdr.Status) {
7199                 if (err == -EINVAL)
7200                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7201                 else if (err == -ENOMEM)
7202                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7203                 else if (err == -ENOENT)
7204                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7205                 else
7206                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7207         }
7208
7209         smb2_set_err_rsp(work);
7210         ksmbd_fd_put(work, fp);
7211         return err;
7212 }
7213
7214 static int fsctl_copychunk(struct ksmbd_work *work,
7215                            struct copychunk_ioctl_req *ci_req,
7216                            unsigned int cnt_code,
7217                            unsigned int input_count,
7218                            unsigned long long volatile_id,
7219                            unsigned long long persistent_id,
7220                            struct smb2_ioctl_rsp *rsp)
7221 {
7222         struct copychunk_ioctl_rsp *ci_rsp;
7223         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7224         struct srv_copychunk *chunks;
7225         unsigned int i, chunk_count, chunk_count_written = 0;
7226         unsigned int chunk_size_written = 0;
7227         loff_t total_size_written = 0;
7228         int ret = 0;
7229
7230         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7231
7232         rsp->VolatileFileId = volatile_id;
7233         rsp->PersistentFileId = persistent_id;
7234         ci_rsp->ChunksWritten =
7235                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7236         ci_rsp->ChunkBytesWritten =
7237                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7238         ci_rsp->TotalBytesWritten =
7239                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7240
7241         chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7242         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7243         if (chunk_count == 0)
7244                 goto out;
7245         total_size_written = 0;
7246
7247         /* verify the SRV_COPYCHUNK_COPY packet */
7248         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7249             input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7250              chunk_count * sizeof(struct srv_copychunk)) {
7251                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7252                 return -EINVAL;
7253         }
7254
7255         for (i = 0; i < chunk_count; i++) {
7256                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7257                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7258                         break;
7259                 total_size_written += le32_to_cpu(chunks[i].Length);
7260         }
7261
7262         if (i < chunk_count ||
7263             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7264                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7265                 return -EINVAL;
7266         }
7267
7268         src_fp = ksmbd_lookup_foreign_fd(work,
7269                                          le64_to_cpu(ci_req->ResumeKey[0]));
7270         dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7271         ret = -EINVAL;
7272         if (!src_fp ||
7273             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7274                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7275                 goto out;
7276         }
7277
7278         if (!dst_fp) {
7279                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7280                 goto out;
7281         }
7282
7283         /*
7284          * FILE_READ_DATA should only be included in
7285          * the FSCTL_COPYCHUNK case
7286          */
7287         if (cnt_code == FSCTL_COPYCHUNK &&
7288             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7289                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7290                 goto out;
7291         }
7292
7293         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7294                                          chunks, chunk_count,
7295                                          &chunk_count_written,
7296                                          &chunk_size_written,
7297                                          &total_size_written);
7298         if (ret < 0) {
7299                 if (ret == -EACCES)
7300                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7301                 if (ret == -EAGAIN)
7302                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7303                 else if (ret == -EBADF)
7304                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7305                 else if (ret == -EFBIG || ret == -ENOSPC)
7306                         rsp->hdr.Status = STATUS_DISK_FULL;
7307                 else if (ret == -EINVAL)
7308                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7309                 else if (ret == -EISDIR)
7310                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7311                 else if (ret == -E2BIG)
7312                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7313                 else
7314                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7315         }
7316
7317         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7318         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7319         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7320 out:
7321         ksmbd_fd_put(work, src_fp);
7322         ksmbd_fd_put(work, dst_fp);
7323         return ret;
7324 }
7325
7326 static __be32 idev_ipv4_address(struct in_device *idev)
7327 {
7328         __be32 addr = 0;
7329
7330         struct in_ifaddr *ifa;
7331
7332         rcu_read_lock();
7333         in_dev_for_each_ifa_rcu(ifa, idev) {
7334                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7335                         continue;
7336
7337                 addr = ifa->ifa_address;
7338                 break;
7339         }
7340         rcu_read_unlock();
7341         return addr;
7342 }
7343
7344 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7345                                         struct smb2_ioctl_rsp *rsp,
7346                                         unsigned int out_buf_len)
7347 {
7348         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7349         int nbytes = 0;
7350         struct net_device *netdev;
7351         struct sockaddr_storage_rsp *sockaddr_storage;
7352         unsigned int flags;
7353         unsigned long long speed;
7354
7355         rtnl_lock();
7356         for_each_netdev(&init_net, netdev) {
7357                 bool ipv4_set = false;
7358
7359                 if (netdev->type == ARPHRD_LOOPBACK)
7360                         continue;
7361
7362                 flags = dev_get_flags(netdev);
7363                 if (!(flags & IFF_RUNNING))
7364                         continue;
7365 ipv6_retry:
7366                 if (out_buf_len <
7367                     nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7368                         rtnl_unlock();
7369                         return -ENOSPC;
7370                 }
7371
7372                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7373                                 &rsp->Buffer[nbytes];
7374                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7375
7376                 nii_rsp->Capability = 0;
7377                 if (netdev->real_num_tx_queues > 1)
7378                         nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7379                 if (ksmbd_rdma_capable_netdev(netdev))
7380                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7381
7382                 nii_rsp->Next = cpu_to_le32(152);
7383                 nii_rsp->Reserved = 0;
7384
7385                 if (netdev->ethtool_ops->get_link_ksettings) {
7386                         struct ethtool_link_ksettings cmd;
7387
7388                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7389                         speed = cmd.base.speed;
7390                 } else {
7391                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7392                                     "speed is unknown, defaulting to 1Gb/sec");
7393                         speed = SPEED_1000;
7394                 }
7395
7396                 speed *= 1000000;
7397                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7398
7399                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7400                                         nii_rsp->SockAddr_Storage;
7401                 memset(sockaddr_storage, 0, 128);
7402
7403                 if (!ipv4_set) {
7404                         struct in_device *idev;
7405
7406                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7407                         sockaddr_storage->addr4.Port = 0;
7408
7409                         idev = __in_dev_get_rtnl(netdev);
7410                         if (!idev)
7411                                 continue;
7412                         sockaddr_storage->addr4.IPv4address =
7413                                                 idev_ipv4_address(idev);
7414                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7415                         ipv4_set = true;
7416                         goto ipv6_retry;
7417                 } else {
7418                         struct inet6_dev *idev6;
7419                         struct inet6_ifaddr *ifa;
7420                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7421
7422                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7423                         sockaddr_storage->addr6.Port = 0;
7424                         sockaddr_storage->addr6.FlowInfo = 0;
7425
7426                         idev6 = __in6_dev_get(netdev);
7427                         if (!idev6)
7428                                 continue;
7429
7430                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7431                                 if (ifa->flags & (IFA_F_TENTATIVE |
7432                                                         IFA_F_DEPRECATED))
7433                                         continue;
7434                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7435                                 break;
7436                         }
7437                         sockaddr_storage->addr6.ScopeId = 0;
7438                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7439                 }
7440         }
7441         rtnl_unlock();
7442
7443         /* zero if this is last one */
7444         if (nii_rsp)
7445                 nii_rsp->Next = 0;
7446
7447         rsp->PersistentFileId = SMB2_NO_FID;
7448         rsp->VolatileFileId = SMB2_NO_FID;
7449         return nbytes;
7450 }
7451
7452 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7453                                          struct validate_negotiate_info_req *neg_req,
7454                                          struct validate_negotiate_info_rsp *neg_rsp,
7455                                          unsigned int in_buf_len)
7456 {
7457         int ret = 0;
7458         int dialect;
7459
7460         if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7461                         le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7462                 return -EINVAL;
7463
7464         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7465                                              neg_req->DialectCount);
7466         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7467                 ret = -EINVAL;
7468                 goto err_out;
7469         }
7470
7471         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7472                 ret = -EINVAL;
7473                 goto err_out;
7474         }
7475
7476         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7477                 ret = -EINVAL;
7478                 goto err_out;
7479         }
7480
7481         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7482                 ret = -EINVAL;
7483                 goto err_out;
7484         }
7485
7486         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7487         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7488         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7489         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7490 err_out:
7491         return ret;
7492 }
7493
7494 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7495                                         struct file_allocated_range_buffer *qar_req,
7496                                         struct file_allocated_range_buffer *qar_rsp,
7497                                         unsigned int in_count, unsigned int *out_count)
7498 {
7499         struct ksmbd_file *fp;
7500         loff_t start, length;
7501         int ret = 0;
7502
7503         *out_count = 0;
7504         if (in_count == 0)
7505                 return -EINVAL;
7506
7507         start = le64_to_cpu(qar_req->file_offset);
7508         length = le64_to_cpu(qar_req->length);
7509
7510         if (start < 0 || length < 0)
7511                 return -EINVAL;
7512
7513         fp = ksmbd_lookup_fd_fast(work, id);
7514         if (!fp)
7515                 return -ENOENT;
7516
7517         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7518                                    qar_rsp, in_count, out_count);
7519         if (ret && ret != -E2BIG)
7520                 *out_count = 0;
7521
7522         ksmbd_fd_put(work, fp);
7523         return ret;
7524 }
7525
7526 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7527                                  unsigned int out_buf_len,
7528                                  struct smb2_ioctl_req *req,
7529                                  struct smb2_ioctl_rsp *rsp)
7530 {
7531         struct ksmbd_rpc_command *rpc_resp;
7532         char *data_buf = (char *)&req->Buffer[0];
7533         int nbytes = 0;
7534
7535         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7536                                    le32_to_cpu(req->InputCount));
7537         if (rpc_resp) {
7538                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7539                         /*
7540                          * set STATUS_SOME_NOT_MAPPED response
7541                          * for unknown domain sid.
7542                          */
7543                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7544                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7545                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7546                         goto out;
7547                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7548                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7549                         goto out;
7550                 }
7551
7552                 nbytes = rpc_resp->payload_sz;
7553                 if (rpc_resp->payload_sz > out_buf_len) {
7554                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7555                         nbytes = out_buf_len;
7556                 }
7557
7558                 if (!rpc_resp->payload_sz) {
7559                         rsp->hdr.Status =
7560                                 STATUS_UNEXPECTED_IO_ERROR;
7561                         goto out;
7562                 }
7563
7564                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7565         }
7566 out:
7567         kvfree(rpc_resp);
7568         return nbytes;
7569 }
7570
7571 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7572                                    struct file_sparse *sparse)
7573 {
7574         struct ksmbd_file *fp;
7575         struct mnt_idmap *idmap;
7576         int ret = 0;
7577         __le32 old_fattr;
7578
7579         fp = ksmbd_lookup_fd_fast(work, id);
7580         if (!fp)
7581                 return -ENOENT;
7582         idmap = file_mnt_idmap(fp->filp);
7583
7584         old_fattr = fp->f_ci->m_fattr;
7585         if (sparse->SetSparse)
7586                 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7587         else
7588                 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7589
7590         if (fp->f_ci->m_fattr != old_fattr &&
7591             test_share_config_flag(work->tcon->share_conf,
7592                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7593                 struct xattr_dos_attrib da;
7594
7595                 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7596                                                      fp->filp->f_path.dentry, &da);
7597                 if (ret <= 0)
7598                         goto out;
7599
7600                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7601                 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7602                                                      &fp->filp->f_path,
7603                                                      &da, true);
7604                 if (ret)
7605                         fp->f_ci->m_fattr = old_fattr;
7606         }
7607
7608 out:
7609         ksmbd_fd_put(work, fp);
7610         return ret;
7611 }
7612
7613 static int fsctl_request_resume_key(struct ksmbd_work *work,
7614                                     struct smb2_ioctl_req *req,
7615                                     struct resume_key_ioctl_rsp *key_rsp)
7616 {
7617         struct ksmbd_file *fp;
7618
7619         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7620         if (!fp)
7621                 return -ENOENT;
7622
7623         memset(key_rsp, 0, sizeof(*key_rsp));
7624         key_rsp->ResumeKey[0] = req->VolatileFileId;
7625         key_rsp->ResumeKey[1] = req->PersistentFileId;
7626         ksmbd_fd_put(work, fp);
7627
7628         return 0;
7629 }
7630
7631 /**
7632  * smb2_ioctl() - handler for smb2 ioctl command
7633  * @work:       smb work containing ioctl command buffer
7634  *
7635  * Return:      0 on success, otherwise error
7636  */
7637 int smb2_ioctl(struct ksmbd_work *work)
7638 {
7639         struct smb2_ioctl_req *req;
7640         struct smb2_ioctl_rsp *rsp;
7641         unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7642         u64 id = KSMBD_NO_FID;
7643         struct ksmbd_conn *conn = work->conn;
7644         int ret = 0;
7645
7646         if (work->next_smb2_rcv_hdr_off) {
7647                 req = ksmbd_req_buf_next(work);
7648                 rsp = ksmbd_resp_buf_next(work);
7649                 if (!has_file_id(req->VolatileFileId)) {
7650                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7651                                     work->compound_fid);
7652                         id = work->compound_fid;
7653                 }
7654         } else {
7655                 req = smb2_get_msg(work->request_buf);
7656                 rsp = smb2_get_msg(work->response_buf);
7657         }
7658
7659         if (!has_file_id(id))
7660                 id = req->VolatileFileId;
7661
7662         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7663                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7664                 goto out;
7665         }
7666
7667         cnt_code = le32_to_cpu(req->CtlCode);
7668         ret = smb2_calc_max_out_buf_len(work, 48,
7669                                         le32_to_cpu(req->MaxOutputResponse));
7670         if (ret < 0) {
7671                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7672                 goto out;
7673         }
7674         out_buf_len = (unsigned int)ret;
7675         in_buf_len = le32_to_cpu(req->InputCount);
7676
7677         switch (cnt_code) {
7678         case FSCTL_DFS_GET_REFERRALS:
7679         case FSCTL_DFS_GET_REFERRALS_EX:
7680                 /* Not support DFS yet */
7681                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7682                 goto out;
7683         case FSCTL_CREATE_OR_GET_OBJECT_ID:
7684         {
7685                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7686
7687                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7688                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7689                         &rsp->Buffer[0];
7690
7691                 /*
7692                  * TODO: This is dummy implementation to pass smbtorture
7693                  * Need to check correct response later
7694                  */
7695                 memset(obj_buf->ObjectId, 0x0, 16);
7696                 memset(obj_buf->BirthVolumeId, 0x0, 16);
7697                 memset(obj_buf->BirthObjectId, 0x0, 16);
7698                 memset(obj_buf->DomainId, 0x0, 16);
7699
7700                 break;
7701         }
7702         case FSCTL_PIPE_TRANSCEIVE:
7703                 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7704                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7705                 break;
7706         case FSCTL_VALIDATE_NEGOTIATE_INFO:
7707                 if (conn->dialect < SMB30_PROT_ID) {
7708                         ret = -EOPNOTSUPP;
7709                         goto out;
7710                 }
7711
7712                 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
7713                                           Dialects)) {
7714                         ret = -EINVAL;
7715                         goto out;
7716                 }
7717
7718                 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
7719                         ret = -EINVAL;
7720                         goto out;
7721                 }
7722
7723                 ret = fsctl_validate_negotiate_info(conn,
7724                         (struct validate_negotiate_info_req *)&req->Buffer[0],
7725                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7726                         in_buf_len);
7727                 if (ret < 0)
7728                         goto out;
7729
7730                 nbytes = sizeof(struct validate_negotiate_info_rsp);
7731                 rsp->PersistentFileId = SMB2_NO_FID;
7732                 rsp->VolatileFileId = SMB2_NO_FID;
7733                 break;
7734         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7735                 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7736                 if (ret < 0)
7737                         goto out;
7738                 nbytes = ret;
7739                 break;
7740         case FSCTL_REQUEST_RESUME_KEY:
7741                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7742                         ret = -EINVAL;
7743                         goto out;
7744                 }
7745
7746                 ret = fsctl_request_resume_key(work, req,
7747                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7748                 if (ret < 0)
7749                         goto out;
7750                 rsp->PersistentFileId = req->PersistentFileId;
7751                 rsp->VolatileFileId = req->VolatileFileId;
7752                 nbytes = sizeof(struct resume_key_ioctl_rsp);
7753                 break;
7754         case FSCTL_COPYCHUNK:
7755         case FSCTL_COPYCHUNK_WRITE:
7756                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7757                         ksmbd_debug(SMB,
7758                                     "User does not have write permission\n");
7759                         ret = -EACCES;
7760                         goto out;
7761                 }
7762
7763                 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7764                         ret = -EINVAL;
7765                         goto out;
7766                 }
7767
7768                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7769                         ret = -EINVAL;
7770                         goto out;
7771                 }
7772
7773                 nbytes = sizeof(struct copychunk_ioctl_rsp);
7774                 rsp->VolatileFileId = req->VolatileFileId;
7775                 rsp->PersistentFileId = req->PersistentFileId;
7776                 fsctl_copychunk(work,
7777                                 (struct copychunk_ioctl_req *)&req->Buffer[0],
7778                                 le32_to_cpu(req->CtlCode),
7779                                 le32_to_cpu(req->InputCount),
7780                                 req->VolatileFileId,
7781                                 req->PersistentFileId,
7782                                 rsp);
7783                 break;
7784         case FSCTL_SET_SPARSE:
7785                 if (in_buf_len < sizeof(struct file_sparse)) {
7786                         ret = -EINVAL;
7787                         goto out;
7788                 }
7789
7790                 ret = fsctl_set_sparse(work, id,
7791                                        (struct file_sparse *)&req->Buffer[0]);
7792                 if (ret < 0)
7793                         goto out;
7794                 break;
7795         case FSCTL_SET_ZERO_DATA:
7796         {
7797                 struct file_zero_data_information *zero_data;
7798                 struct ksmbd_file *fp;
7799                 loff_t off, len, bfz;
7800
7801                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7802                         ksmbd_debug(SMB,
7803                                     "User does not have write permission\n");
7804                         ret = -EACCES;
7805                         goto out;
7806                 }
7807
7808                 if (in_buf_len < sizeof(struct file_zero_data_information)) {
7809                         ret = -EINVAL;
7810                         goto out;
7811                 }
7812
7813                 zero_data =
7814                         (struct file_zero_data_information *)&req->Buffer[0];
7815
7816                 off = le64_to_cpu(zero_data->FileOffset);
7817                 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
7818                 if (off < 0 || bfz < 0 || off > bfz) {
7819                         ret = -EINVAL;
7820                         goto out;
7821                 }
7822
7823                 len = bfz - off;
7824                 if (len) {
7825                         fp = ksmbd_lookup_fd_fast(work, id);
7826                         if (!fp) {
7827                                 ret = -ENOENT;
7828                                 goto out;
7829                         }
7830
7831                         ret = ksmbd_vfs_zero_data(work, fp, off, len);
7832                         ksmbd_fd_put(work, fp);
7833                         if (ret < 0)
7834                                 goto out;
7835                 }
7836                 break;
7837         }
7838         case FSCTL_QUERY_ALLOCATED_RANGES:
7839                 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7840                         ret = -EINVAL;
7841                         goto out;
7842                 }
7843
7844                 ret = fsctl_query_allocated_ranges(work, id,
7845                         (struct file_allocated_range_buffer *)&req->Buffer[0],
7846                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7847                         out_buf_len /
7848                         sizeof(struct file_allocated_range_buffer), &nbytes);
7849                 if (ret == -E2BIG) {
7850                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7851                 } else if (ret < 0) {
7852                         nbytes = 0;
7853                         goto out;
7854                 }
7855
7856                 nbytes *= sizeof(struct file_allocated_range_buffer);
7857                 break;
7858         case FSCTL_GET_REPARSE_POINT:
7859         {
7860                 struct reparse_data_buffer *reparse_ptr;
7861                 struct ksmbd_file *fp;
7862
7863                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7864                 fp = ksmbd_lookup_fd_fast(work, id);
7865                 if (!fp) {
7866                         pr_err("not found fp!!\n");
7867                         ret = -ENOENT;
7868                         goto out;
7869                 }
7870
7871                 reparse_ptr->ReparseTag =
7872                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7873                 reparse_ptr->ReparseDataLength = 0;
7874                 ksmbd_fd_put(work, fp);
7875                 nbytes = sizeof(struct reparse_data_buffer);
7876                 break;
7877         }
7878         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7879         {
7880                 struct ksmbd_file *fp_in, *fp_out = NULL;
7881                 struct duplicate_extents_to_file *dup_ext;
7882                 loff_t src_off, dst_off, length, cloned;
7883
7884                 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7885                         ret = -EINVAL;
7886                         goto out;
7887                 }
7888
7889                 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7890
7891                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7892                                              dup_ext->PersistentFileHandle);
7893                 if (!fp_in) {
7894                         pr_err("not found file handle in duplicate extent to file\n");
7895                         ret = -ENOENT;
7896                         goto out;
7897                 }
7898
7899                 fp_out = ksmbd_lookup_fd_fast(work, id);
7900                 if (!fp_out) {
7901                         pr_err("not found fp\n");
7902                         ret = -ENOENT;
7903                         goto dup_ext_out;
7904                 }
7905
7906                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7907                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7908                 length = le64_to_cpu(dup_ext->ByteCount);
7909                 /*
7910                  * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
7911                  * should fall back to vfs_copy_file_range().  This could be
7912                  * beneficial when re-exporting nfs/smb mount, but note that
7913                  * this can result in partial copy that returns an error status.
7914                  * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
7915                  * fall back to vfs_copy_file_range(), should be avoided when
7916                  * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
7917                  */
7918                 cloned = vfs_clone_file_range(fp_in->filp, src_off,
7919                                               fp_out->filp, dst_off, length, 0);
7920                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7921                         ret = -EOPNOTSUPP;
7922                         goto dup_ext_out;
7923                 } else if (cloned != length) {
7924                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
7925                                                      fp_out->filp, dst_off,
7926                                                      length, 0);
7927                         if (cloned != length) {
7928                                 if (cloned < 0)
7929                                         ret = cloned;
7930                                 else
7931                                         ret = -EINVAL;
7932                         }
7933                 }
7934
7935 dup_ext_out:
7936                 ksmbd_fd_put(work, fp_in);
7937                 ksmbd_fd_put(work, fp_out);
7938                 if (ret < 0)
7939                         goto out;
7940                 break;
7941         }
7942         default:
7943                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7944                             cnt_code);
7945                 ret = -EOPNOTSUPP;
7946                 goto out;
7947         }
7948
7949         rsp->CtlCode = cpu_to_le32(cnt_code);
7950         rsp->InputCount = cpu_to_le32(0);
7951         rsp->InputOffset = cpu_to_le32(112);
7952         rsp->OutputOffset = cpu_to_le32(112);
7953         rsp->OutputCount = cpu_to_le32(nbytes);
7954         rsp->StructureSize = cpu_to_le16(49);
7955         rsp->Reserved = cpu_to_le16(0);
7956         rsp->Flags = cpu_to_le32(0);
7957         rsp->Reserved2 = cpu_to_le32(0);
7958         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
7959         if (!ret)
7960                 return ret;
7961
7962 out:
7963         if (ret == -EACCES)
7964                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7965         else if (ret == -ENOENT)
7966                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7967         else if (ret == -EOPNOTSUPP)
7968                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7969         else if (ret == -ENOSPC)
7970                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7971         else if (ret < 0 || rsp->hdr.Status == 0)
7972                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7973         smb2_set_err_rsp(work);
7974         return 0;
7975 }
7976
7977 /**
7978  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7979  * @work:       smb work containing oplock break command buffer
7980  *
7981  * Return:      0
7982  */
7983 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7984 {
7985         struct smb2_oplock_break *req;
7986         struct smb2_oplock_break *rsp;
7987         struct ksmbd_file *fp;
7988         struct oplock_info *opinfo = NULL;
7989         __le32 err = 0;
7990         int ret = 0;
7991         u64 volatile_id, persistent_id;
7992         char req_oplevel = 0, rsp_oplevel = 0;
7993         unsigned int oplock_change_type;
7994
7995         WORK_BUFFERS(work, req, rsp);
7996
7997         volatile_id = req->VolatileFid;
7998         persistent_id = req->PersistentFid;
7999         req_oplevel = req->OplockLevel;
8000         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
8001                     volatile_id, persistent_id, req_oplevel);
8002
8003         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
8004         if (!fp) {
8005                 rsp->hdr.Status = STATUS_FILE_CLOSED;
8006                 smb2_set_err_rsp(work);
8007                 return;
8008         }
8009
8010         opinfo = opinfo_get(fp);
8011         if (!opinfo) {
8012                 pr_err("unexpected null oplock_info\n");
8013                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8014                 smb2_set_err_rsp(work);
8015                 ksmbd_fd_put(work, fp);
8016                 return;
8017         }
8018
8019         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8020                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8021                 goto err_out;
8022         }
8023
8024         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8025                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8026                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8027                 goto err_out;
8028         }
8029
8030         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8031              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8032             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8033              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8034                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8035                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8036         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8037                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8038                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8039                 oplock_change_type = OPLOCK_READ_TO_NONE;
8040         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8041                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8042                 err = STATUS_INVALID_DEVICE_STATE;
8043                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8044                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8045                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8046                         oplock_change_type = OPLOCK_WRITE_TO_READ;
8047                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8048                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8049                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8050                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
8051                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8052                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8053                         oplock_change_type = OPLOCK_READ_TO_NONE;
8054                 } else {
8055                         oplock_change_type = 0;
8056                 }
8057         } else {
8058                 oplock_change_type = 0;
8059         }
8060
8061         switch (oplock_change_type) {
8062         case OPLOCK_WRITE_TO_READ:
8063                 ret = opinfo_write_to_read(opinfo);
8064                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8065                 break;
8066         case OPLOCK_WRITE_TO_NONE:
8067                 ret = opinfo_write_to_none(opinfo);
8068                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8069                 break;
8070         case OPLOCK_READ_TO_NONE:
8071                 ret = opinfo_read_to_none(opinfo);
8072                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8073                 break;
8074         default:
8075                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8076                        opinfo->level, rsp_oplevel);
8077         }
8078
8079         if (ret < 0) {
8080                 rsp->hdr.Status = err;
8081                 goto err_out;
8082         }
8083
8084         opinfo->op_state = OPLOCK_STATE_NONE;
8085         wake_up_interruptible_all(&opinfo->oplock_q);
8086         opinfo_put(opinfo);
8087         ksmbd_fd_put(work, fp);
8088
8089         rsp->StructureSize = cpu_to_le16(24);
8090         rsp->OplockLevel = rsp_oplevel;
8091         rsp->Reserved = 0;
8092         rsp->Reserved2 = 0;
8093         rsp->VolatileFid = volatile_id;
8094         rsp->PersistentFid = persistent_id;
8095         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8096         if (!ret)
8097                 return;
8098
8099 err_out:
8100         opinfo->op_state = OPLOCK_STATE_NONE;
8101         wake_up_interruptible_all(&opinfo->oplock_q);
8102
8103         opinfo_put(opinfo);
8104         ksmbd_fd_put(work, fp);
8105         smb2_set_err_rsp(work);
8106 }
8107
8108 static int check_lease_state(struct lease *lease, __le32 req_state)
8109 {
8110         if ((lease->new_state ==
8111              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8112             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8113                 lease->new_state = req_state;
8114                 return 0;
8115         }
8116
8117         if (lease->new_state == req_state)
8118                 return 0;
8119
8120         return 1;
8121 }
8122
8123 /**
8124  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8125  * @work:       smb work containing lease break command buffer
8126  *
8127  * Return:      0
8128  */
8129 static void smb21_lease_break_ack(struct ksmbd_work *work)
8130 {
8131         struct ksmbd_conn *conn = work->conn;
8132         struct smb2_lease_ack *req;
8133         struct smb2_lease_ack *rsp;
8134         struct oplock_info *opinfo;
8135         __le32 err = 0;
8136         int ret = 0;
8137         unsigned int lease_change_type;
8138         __le32 lease_state;
8139         struct lease *lease;
8140
8141         WORK_BUFFERS(work, req, rsp);
8142
8143         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8144                     le32_to_cpu(req->LeaseState));
8145         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8146         if (!opinfo) {
8147                 ksmbd_debug(OPLOCK, "file not opened\n");
8148                 smb2_set_err_rsp(work);
8149                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8150                 return;
8151         }
8152         lease = opinfo->o_lease;
8153
8154         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8155                 pr_err("unexpected lease break state 0x%x\n",
8156                        opinfo->op_state);
8157                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8158                 goto err_out;
8159         }
8160
8161         if (check_lease_state(lease, req->LeaseState)) {
8162                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8163                 ksmbd_debug(OPLOCK,
8164                             "req lease state: 0x%x, expected state: 0x%x\n",
8165                             req->LeaseState, lease->new_state);
8166                 goto err_out;
8167         }
8168
8169         if (!atomic_read(&opinfo->breaking_cnt)) {
8170                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8171                 goto err_out;
8172         }
8173
8174         /* check for bad lease state */
8175         if (req->LeaseState &
8176             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8177                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
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                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8183                             le32_to_cpu(lease->state),
8184                             le32_to_cpu(req->LeaseState));
8185         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8186                    req->LeaseState != SMB2_LEASE_NONE_LE) {
8187                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8188                 lease_change_type = OPLOCK_READ_TO_NONE;
8189                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8190                             le32_to_cpu(lease->state),
8191                             le32_to_cpu(req->LeaseState));
8192         } else {
8193                 /* valid lease state changes */
8194                 err = STATUS_INVALID_DEVICE_STATE;
8195                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8196                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8197                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
8198                         else
8199                                 lease_change_type = OPLOCK_READ_TO_NONE;
8200                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8201                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8202                                 lease_change_type = OPLOCK_WRITE_TO_READ;
8203                         else
8204                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8205                 } else {
8206                         lease_change_type = 0;
8207                 }
8208         }
8209
8210         switch (lease_change_type) {
8211         case OPLOCK_WRITE_TO_READ:
8212                 ret = opinfo_write_to_read(opinfo);
8213                 break;
8214         case OPLOCK_READ_HANDLE_TO_READ:
8215                 ret = opinfo_read_handle_to_read(opinfo);
8216                 break;
8217         case OPLOCK_WRITE_TO_NONE:
8218                 ret = opinfo_write_to_none(opinfo);
8219                 break;
8220         case OPLOCK_READ_TO_NONE:
8221                 ret = opinfo_read_to_none(opinfo);
8222                 break;
8223         default:
8224                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8225                             le32_to_cpu(lease->state),
8226                             le32_to_cpu(req->LeaseState));
8227         }
8228
8229         if (ret < 0) {
8230                 rsp->hdr.Status = err;
8231                 goto err_out;
8232         }
8233
8234         lease_state = lease->state;
8235         opinfo->op_state = OPLOCK_STATE_NONE;
8236         wake_up_interruptible_all(&opinfo->oplock_q);
8237         atomic_dec(&opinfo->breaking_cnt);
8238         wake_up_interruptible_all(&opinfo->oplock_brk);
8239         opinfo_put(opinfo);
8240
8241         rsp->StructureSize = cpu_to_le16(36);
8242         rsp->Reserved = 0;
8243         rsp->Flags = 0;
8244         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8245         rsp->LeaseState = lease_state;
8246         rsp->LeaseDuration = 0;
8247         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8248         if (!ret)
8249                 return;
8250
8251 err_out:
8252         wake_up_interruptible_all(&opinfo->oplock_q);
8253         atomic_dec(&opinfo->breaking_cnt);
8254         wake_up_interruptible_all(&opinfo->oplock_brk);
8255
8256         opinfo_put(opinfo);
8257         smb2_set_err_rsp(work);
8258 }
8259
8260 /**
8261  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8262  * @work:       smb work containing oplock/lease break command buffer
8263  *
8264  * Return:      0
8265  */
8266 int smb2_oplock_break(struct ksmbd_work *work)
8267 {
8268         struct smb2_oplock_break *req;
8269         struct smb2_oplock_break *rsp;
8270
8271         WORK_BUFFERS(work, req, rsp);
8272
8273         switch (le16_to_cpu(req->StructureSize)) {
8274         case OP_BREAK_STRUCT_SIZE_20:
8275                 smb20_oplock_break_ack(work);
8276                 break;
8277         case OP_BREAK_STRUCT_SIZE_21:
8278                 smb21_lease_break_ack(work);
8279                 break;
8280         default:
8281                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8282                             le16_to_cpu(req->StructureSize));
8283                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8284                 smb2_set_err_rsp(work);
8285         }
8286
8287         return 0;
8288 }
8289
8290 /**
8291  * smb2_notify() - handler for smb2 notify request
8292  * @work:   smb work containing notify command buffer
8293  *
8294  * Return:      0
8295  */
8296 int smb2_notify(struct ksmbd_work *work)
8297 {
8298         struct smb2_change_notify_req *req;
8299         struct smb2_change_notify_rsp *rsp;
8300
8301         WORK_BUFFERS(work, req, rsp);
8302
8303         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8304                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8305                 smb2_set_err_rsp(work);
8306                 return 0;
8307         }
8308
8309         smb2_set_err_rsp(work);
8310         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8311         return 0;
8312 }
8313
8314 /**
8315  * smb2_is_sign_req() - handler for checking packet signing status
8316  * @work:       smb work containing notify command buffer
8317  * @command:    SMB2 command id
8318  *
8319  * Return:      true if packed is signed, false otherwise
8320  */
8321 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8322 {
8323         struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8324
8325         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8326             command != SMB2_NEGOTIATE_HE &&
8327             command != SMB2_SESSION_SETUP_HE &&
8328             command != SMB2_OPLOCK_BREAK_HE)
8329                 return true;
8330
8331         return false;
8332 }
8333
8334 /**
8335  * smb2_check_sign_req() - handler for req packet sign processing
8336  * @work:   smb work containing notify command buffer
8337  *
8338  * Return:      1 on success, 0 otherwise
8339  */
8340 int smb2_check_sign_req(struct ksmbd_work *work)
8341 {
8342         struct smb2_hdr *hdr;
8343         char signature_req[SMB2_SIGNATURE_SIZE];
8344         char signature[SMB2_HMACSHA256_SIZE];
8345         struct kvec iov[1];
8346         size_t len;
8347
8348         hdr = smb2_get_msg(work->request_buf);
8349         if (work->next_smb2_rcv_hdr_off)
8350                 hdr = ksmbd_req_buf_next(work);
8351
8352         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8353                 len = get_rfc1002_len(work->request_buf);
8354         else if (hdr->NextCommand)
8355                 len = le32_to_cpu(hdr->NextCommand);
8356         else
8357                 len = get_rfc1002_len(work->request_buf) -
8358                         work->next_smb2_rcv_hdr_off;
8359
8360         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8361         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8362
8363         iov[0].iov_base = (char *)&hdr->ProtocolId;
8364         iov[0].iov_len = len;
8365
8366         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8367                                 signature))
8368                 return 0;
8369
8370         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8371                 pr_err("bad smb2 signature\n");
8372                 return 0;
8373         }
8374
8375         return 1;
8376 }
8377
8378 /**
8379  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8380  * @work:   smb work containing notify command buffer
8381  *
8382  */
8383 void smb2_set_sign_rsp(struct ksmbd_work *work)
8384 {
8385         struct smb2_hdr *hdr;
8386         char signature[SMB2_HMACSHA256_SIZE];
8387         struct kvec *iov;
8388         int n_vec = 1;
8389
8390         hdr = ksmbd_resp_buf_curr(work);
8391         hdr->Flags |= SMB2_FLAGS_SIGNED;
8392         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8393
8394         if (hdr->Command == SMB2_READ) {
8395                 iov = &work->iov[work->iov_idx - 1];
8396                 n_vec++;
8397         } else {
8398                 iov = &work->iov[work->iov_idx];
8399         }
8400
8401         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8402                                  signature))
8403                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8404 }
8405
8406 /**
8407  * smb3_check_sign_req() - handler for req packet sign processing
8408  * @work:   smb work containing notify command buffer
8409  *
8410  * Return:      1 on success, 0 otherwise
8411  */
8412 int smb3_check_sign_req(struct ksmbd_work *work)
8413 {
8414         struct ksmbd_conn *conn = work->conn;
8415         char *signing_key;
8416         struct smb2_hdr *hdr;
8417         struct channel *chann;
8418         char signature_req[SMB2_SIGNATURE_SIZE];
8419         char signature[SMB2_CMACAES_SIZE];
8420         struct kvec iov[1];
8421         size_t len;
8422
8423         hdr = smb2_get_msg(work->request_buf);
8424         if (work->next_smb2_rcv_hdr_off)
8425                 hdr = ksmbd_req_buf_next(work);
8426
8427         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8428                 len = get_rfc1002_len(work->request_buf);
8429         else if (hdr->NextCommand)
8430                 len = le32_to_cpu(hdr->NextCommand);
8431         else
8432                 len = get_rfc1002_len(work->request_buf) -
8433                         work->next_smb2_rcv_hdr_off;
8434
8435         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8436                 signing_key = work->sess->smb3signingkey;
8437         } else {
8438                 chann = lookup_chann_list(work->sess, conn);
8439                 if (!chann) {
8440                         return 0;
8441                 }
8442                 signing_key = chann->smb3signingkey;
8443         }
8444
8445         if (!signing_key) {
8446                 pr_err("SMB3 signing key is not generated\n");
8447                 return 0;
8448         }
8449
8450         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8451         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8452         iov[0].iov_base = (char *)&hdr->ProtocolId;
8453         iov[0].iov_len = len;
8454
8455         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8456                 return 0;
8457
8458         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8459                 pr_err("bad smb2 signature\n");
8460                 return 0;
8461         }
8462
8463         return 1;
8464 }
8465
8466 /**
8467  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8468  * @work:   smb work containing notify command buffer
8469  *
8470  */
8471 void smb3_set_sign_rsp(struct ksmbd_work *work)
8472 {
8473         struct ksmbd_conn *conn = work->conn;
8474         struct smb2_hdr *hdr;
8475         struct channel *chann;
8476         char signature[SMB2_CMACAES_SIZE];
8477         struct kvec *iov;
8478         int n_vec = 1;
8479         char *signing_key;
8480
8481         hdr = ksmbd_resp_buf_curr(work);
8482
8483         if (conn->binding == false &&
8484             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8485                 signing_key = work->sess->smb3signingkey;
8486         } else {
8487                 chann = lookup_chann_list(work->sess, work->conn);
8488                 if (!chann) {
8489                         return;
8490                 }
8491                 signing_key = chann->smb3signingkey;
8492         }
8493
8494         if (!signing_key)
8495                 return;
8496
8497         hdr->Flags |= SMB2_FLAGS_SIGNED;
8498         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8499
8500         if (hdr->Command == SMB2_READ) {
8501                 iov = &work->iov[work->iov_idx - 1];
8502                 n_vec++;
8503         } else {
8504                 iov = &work->iov[work->iov_idx];
8505         }
8506
8507         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8508                                  signature))
8509                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8510 }
8511
8512 /**
8513  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8514  * @work:   smb work containing response buffer
8515  *
8516  */
8517 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8518 {
8519         struct ksmbd_conn *conn = work->conn;
8520         struct ksmbd_session *sess = work->sess;
8521         struct smb2_hdr *req, *rsp;
8522
8523         if (conn->dialect != SMB311_PROT_ID)
8524                 return;
8525
8526         WORK_BUFFERS(work, req, rsp);
8527
8528         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8529             conn->preauth_info)
8530                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8531                                                  conn->preauth_info->Preauth_HashValue);
8532
8533         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8534                 __u8 *hash_value;
8535
8536                 if (conn->binding) {
8537                         struct preauth_session *preauth_sess;
8538
8539                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8540                         if (!preauth_sess)
8541                                 return;
8542                         hash_value = preauth_sess->Preauth_HashValue;
8543                 } else {
8544                         hash_value = sess->Preauth_HashValue;
8545                         if (!hash_value)
8546                                 return;
8547                 }
8548                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8549                                                  hash_value);
8550         }
8551 }
8552
8553 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8554 {
8555         struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8556         struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8557         unsigned int orig_len = get_rfc1002_len(old_buf);
8558
8559         /* tr_buf must be cleared by the caller */
8560         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8561         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8562         tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8563         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8564             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8565                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8566         else
8567                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8568         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8569         inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8570         inc_rfc1001_len(tr_buf, orig_len);
8571 }
8572
8573 int smb3_encrypt_resp(struct ksmbd_work *work)
8574 {
8575         struct kvec *iov = work->iov;
8576         int rc = -ENOMEM;
8577         void *tr_buf;
8578
8579         tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8580         if (!tr_buf)
8581                 return rc;
8582
8583         /* fill transform header */
8584         fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8585
8586         iov[0].iov_base = tr_buf;
8587         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8588         work->tr_buf = tr_buf;
8589
8590         return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8591 }
8592
8593 bool smb3_is_transform_hdr(void *buf)
8594 {
8595         struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8596
8597         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8598 }
8599
8600 int smb3_decrypt_req(struct ksmbd_work *work)
8601 {
8602         struct ksmbd_session *sess;
8603         char *buf = work->request_buf;
8604         unsigned int pdu_length = get_rfc1002_len(buf);
8605         struct kvec iov[2];
8606         int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8607         struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8608         int rc = 0;
8609
8610         if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8611             buf_data_size < sizeof(struct smb2_hdr)) {
8612                 pr_err("Transform message is too small (%u)\n",
8613                        pdu_length);
8614                 return -ECONNABORTED;
8615         }
8616
8617         if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8618                 pr_err("Transform message is broken\n");
8619                 return -ECONNABORTED;
8620         }
8621
8622         sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8623         if (!sess) {
8624                 pr_err("invalid session id(%llx) in transform header\n",
8625                        le64_to_cpu(tr_hdr->SessionId));
8626                 return -ECONNABORTED;
8627         }
8628
8629         iov[0].iov_base = buf;
8630         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8631         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8632         iov[1].iov_len = buf_data_size;
8633         rc = ksmbd_crypt_message(work, iov, 2, 0);
8634         if (rc)
8635                 return rc;
8636
8637         memmove(buf + 4, iov[1].iov_base, buf_data_size);
8638         *(__be32 *)buf = cpu_to_be32(buf_data_size);
8639
8640         return rc;
8641 }
8642
8643 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8644 {
8645         struct ksmbd_conn *conn = work->conn;
8646         struct ksmbd_session *sess = work->sess;
8647         struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8648
8649         if (conn->dialect < SMB30_PROT_ID)
8650                 return false;
8651
8652         if (work->next_smb2_rcv_hdr_off)
8653                 rsp = ksmbd_resp_buf_next(work);
8654
8655         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8656             sess->user && !user_guest(sess->user) &&
8657             rsp->Status == STATUS_SUCCESS)
8658                 return true;
8659         return false;
8660 }