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