fs/smb/server/smb2pdu.c

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