fs/smb/server/smb2pdu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
   4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
   5  */
   6
   7 #include <linux/inetdevice.h>
   8 #include <net/addrconf.h>
   9 #include <linux/syscalls.h>
  10 #include <linux/namei.h>
  11 #include <linux/statfs.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/falloc.h>
  14 #include <linux/mount.h>
  15 #include <linux/filelock.h>
  16
  17 #include "glob.h"
  18 #include "smbfsctl.h"
  19 #include "oplock.h"
  20 #include "smbacl.h"
  21
  22 #include "auth.h"
  23 #include "asn1.h"
  24 #include "connection.h"
  25 #include "transport_ipc.h"
  26 #include "transport_rdma.h"
  27 #include "vfs.h"
  28 #include "vfs_cache.h"
  29 #include "misc.h"
  30
  31 #include "server.h"
  32 #include "smb_common.h"
  33 #include "smbstatus.h"
  34 #include "ksmbd_work.h"
  35 #include "mgmt/user_config.h"
  36 #include "mgmt/share_config.h"
  37 #include "mgmt/tree_connect.h"
  38 #include "mgmt/user_session.h"
  39 #include "mgmt/ksmbd_ida.h"
  40 #include "ndr.h"
  41
  42 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
  43 {
  44         if (work->next_smb2_rcv_hdr_off) {
  45                 *req = ksmbd_req_buf_next(work);
  46                 *rsp = ksmbd_resp_buf_next(work);
  47         } else {
  48                 *req = smb2_get_msg(work->request_buf);
  49                 *rsp = smb2_get_msg(work->response_buf);
  50         }
  51 }
  52
  53 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
  54
  55 /**
  56  * check_session_id() - check for valid session id in smb header
  57  * @conn:       connection instance
  58  * @id:         session id from smb header
  59  *
  60  * Return:      1 if valid session id, otherwise 0
  61  */
  62 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
  63 {
  64         struct ksmbd_session *sess;
  65
  66         if (id == 0 || id == -1)
  67                 return false;
  68
  69         sess = ksmbd_session_lookup_all(conn, id);
  70         if (sess)
  71                 return true;
  72         pr_err("Invalid user session id: %llu\n", id);
  73         return false;
  74 }
  75
  76 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
  77 {
  78         return xa_load(&sess->ksmbd_chann_list, (long)conn);
  79 }
  80
  81 /**
  82  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
  83  * @work:       smb work
  84  *
  85  * Return:      0 if there is a tree connection matched or these are
  86  *              skipable commands, otherwise error
  87  */
  88 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
  89 {
  90         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
  91         unsigned int cmd = le16_to_cpu(req_hdr->Command);
  92         unsigned int tree_id;
  93
  94         if (cmd == SMB2_TREE_CONNECT_HE ||
  95             cmd ==  SMB2_CANCEL_HE ||
  96             cmd ==  SMB2_LOGOFF_HE) {
  97                 ksmbd_debug(SMB, "skip to check tree connect request\n");
  98                 return 0;
  99         }
 100
 101         if (xa_empty(&work->sess->tree_conns)) {
 102                 ksmbd_debug(SMB, "NO tree connected\n");
 103                 return -ENOENT;
 104         }
 105
 106         tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
 107
 108         /*
 109          * If request is not the first in Compound request,
 110          * Just validate tree id in header with work->tcon->id.
 111          */
 112         if (work->next_smb2_rcv_hdr_off) {
 113                 if (!work->tcon) {
 114                         pr_err("The first operation in the compound does not have tcon\n");
 115                         return -EINVAL;
 116                 }
 117                 if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
 118                         pr_err("tree id(%u) is different with id(%u) in first operation\n",
 119                                         tree_id, work->tcon->id);
 120                         return -EINVAL;
 121                 }
 122                 return 1;
 123         }
 124
 125         work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
 126         if (!work->tcon) {
 127                 pr_err("Invalid tid %d\n", tree_id);
 128                 return -ENOENT;
 129         }
 130
 131         return 1;
 132 }
 133
 134 /**
 135  * smb2_set_err_rsp() - set error response code on smb response
 136  * @work:       smb work containing response buffer
 137  */
 138 void smb2_set_err_rsp(struct ksmbd_work *work)
 139 {
 140         struct smb2_err_rsp *err_rsp;
 141
 142         if (work->next_smb2_rcv_hdr_off)
 143                 err_rsp = ksmbd_resp_buf_next(work);
 144         else
 145                 err_rsp = smb2_get_msg(work->response_buf);
 146
 147         if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
 148                 int err;
 149
 150                 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
 151                 err_rsp->ErrorContextCount = 0;
 152                 err_rsp->Reserved = 0;
 153                 err_rsp->ByteCount = 0;
 154                 err_rsp->ErrorData[0] = 0;
 155                 err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
 156                                         __SMB2_HEADER_STRUCTURE_SIZE +
 157                                                 SMB2_ERROR_STRUCTURE_SIZE2);
 158                 if (err)
 159                         work->send_no_response = 1;
 160         }
 161 }
 162
 163 /**
 164  * is_smb2_neg_cmd() - is it smb2 negotiation command
 165  * @work:       smb work containing smb header
 166  *
 167  * Return:      true if smb2 negotiation command, otherwise false
 168  */
 169 bool is_smb2_neg_cmd(struct ksmbd_work *work)
 170 {
 171         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 172
 173         /* is it SMB2 header ? */
 174         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 175                 return false;
 176
 177         /* make sure it is request not response message */
 178         if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
 179                 return false;
 180
 181         if (hdr->Command != SMB2_NEGOTIATE)
 182                 return false;
 183
 184         return true;
 185 }
 186
 187 /**
 188  * is_smb2_rsp() - is it smb2 response
 189  * @work:       smb work containing smb response buffer
 190  *
 191  * Return:      true if smb2 response, otherwise false
 192  */
 193 bool is_smb2_rsp(struct ksmbd_work *work)
 194 {
 195         struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
 196
 197         /* is it SMB2 header ? */
 198         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 199                 return false;
 200
 201         /* make sure it is response not request message */
 202         if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
 203                 return false;
 204
 205         return true;
 206 }
 207
 208 /**
 209  * get_smb2_cmd_val() - get smb command code from smb header
 210  * @work:       smb work containing smb request buffer
 211  *
 212  * Return:      smb2 request command value
 213  */
 214 u16 get_smb2_cmd_val(struct ksmbd_work *work)
 215 {
 216         struct smb2_hdr *rcv_hdr;
 217
 218         if (work->next_smb2_rcv_hdr_off)
 219                 rcv_hdr = ksmbd_req_buf_next(work);
 220         else
 221                 rcv_hdr = smb2_get_msg(work->request_buf);
 222         return le16_to_cpu(rcv_hdr->Command);
 223 }
 224
 225 /**
 226  * set_smb2_rsp_status() - set error response code on smb2 header
 227  * @work:       smb work containing response buffer
 228  * @err:        error response code
 229  */
 230 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
 231 {
 232         struct smb2_hdr *rsp_hdr;
 233
 234         rsp_hdr = smb2_get_msg(work->response_buf);
 235         rsp_hdr->Status = err;
 236
 237         work->iov_idx = 0;
 238         work->iov_cnt = 0;
 239         work->next_smb2_rcv_hdr_off = 0;
 240         smb2_set_err_rsp(work);
 241 }
 242
 243 /**
 244  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
 245  * @work:       smb work containing smb request buffer
 246  *
 247  * smb2 negotiate response is sent in reply of smb1 negotiate command for
 248  * dialect auto-negotiation.
 249  */
 250 int init_smb2_neg_rsp(struct ksmbd_work *work)
 251 {
 252         struct smb2_hdr *rsp_hdr;
 253         struct smb2_negotiate_rsp *rsp;
 254         struct ksmbd_conn *conn = work->conn;
 255         int err;
 256
 257         rsp_hdr = smb2_get_msg(work->response_buf);
 258         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 259         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 260         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 261         rsp_hdr->CreditRequest = cpu_to_le16(2);
 262         rsp_hdr->Command = SMB2_NEGOTIATE;
 263         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 264         rsp_hdr->NextCommand = 0;
 265         rsp_hdr->MessageId = 0;
 266         rsp_hdr->Id.SyncId.ProcessId = 0;
 267         rsp_hdr->Id.SyncId.TreeId = 0;
 268         rsp_hdr->SessionId = 0;
 269         memset(rsp_hdr->Signature, 0, 16);
 270
 271         rsp = smb2_get_msg(work->response_buf);
 272
 273         WARN_ON(ksmbd_conn_good(conn));
 274
 275         rsp->StructureSize = cpu_to_le16(65);
 276         ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
 277         rsp->DialectRevision = cpu_to_le16(conn->dialect);
 278         /* Not setting conn guid rsp->ServerGUID, as it
 279          * not used by client for identifying connection
 280          */
 281         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
 282         /* Default Max Message Size till SMB2.0, 64K*/
 283         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
 284         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
 285         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
 286
 287         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
 288         rsp->ServerStartTime = 0;
 289
 290         rsp->SecurityBufferOffset = cpu_to_le16(128);
 291         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
 292         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
 293                 le16_to_cpu(rsp->SecurityBufferOffset));
 294         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
 295         if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
 296                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
 297         err = ksmbd_iov_pin_rsp(work, rsp,
 298                                 sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
 299         if (err)
 300                 return err;
 301         conn->use_spnego = true;
 302
 303         ksmbd_conn_set_need_negotiate(conn);
 304         return 0;
 305 }
 306
 307 /**
 308  * smb2_set_rsp_credits() - set number of credits in response buffer
 309  * @work:       smb work containing smb response buffer
 310  */
 311 int smb2_set_rsp_credits(struct ksmbd_work *work)
 312 {
 313         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 314         struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
 315         struct ksmbd_conn *conn = work->conn;
 316         unsigned short credits_requested, aux_max;
 317         unsigned short credit_charge, credits_granted = 0;
 318
 319         if (work->send_no_response)
 320                 return 0;
 321
 322         hdr->CreditCharge = req_hdr->CreditCharge;
 323
 324         if (conn->total_credits > conn->vals->max_credits) {
 325                 hdr->CreditRequest = 0;
 326                 pr_err("Total credits overflow: %d\n", conn->total_credits);
 327                 return -EINVAL;
 328         }
 329
 330         credit_charge = max_t(unsigned short,
 331                               le16_to_cpu(req_hdr->CreditCharge), 1);
 332         if (credit_charge > conn->total_credits) {
 333                 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
 334                             credit_charge, conn->total_credits);
 335                 return -EINVAL;
 336         }
 337
 338         conn->total_credits -= credit_charge;
 339         conn->outstanding_credits -= credit_charge;
 340         credits_requested = max_t(unsigned short,
 341                                   le16_to_cpu(req_hdr->CreditRequest), 1);
 342
 343         /* according to smb2.credits smbtorture, Windows server
 344          * 2016 or later grant up to 8192 credits at once.
 345          *
 346          * TODO: Need to adjuct CreditRequest value according to
 347          * current cpu load
 348          */
 349         if (hdr->Command == SMB2_NEGOTIATE)
 350                 aux_max = 1;
 351         else
 352                 aux_max = conn->vals->max_credits - conn->total_credits;
 353         credits_granted = min_t(unsigned short, credits_requested, aux_max);
 354
 355         conn->total_credits += credits_granted;
 356         work->credits_granted += credits_granted;
 357
 358         if (!req_hdr->NextCommand) {
 359                 /* Update CreditRequest in last request */
 360                 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
 361         }
 362         ksmbd_debug(SMB,
 363                     "credits: requested[%d] granted[%d] total_granted[%d]\n",
 364                     credits_requested, credits_granted,
 365                     conn->total_credits);
 366         return 0;
 367 }
 368
 369 /**
 370  * init_chained_smb2_rsp() - initialize smb2 chained response
 371  * @work:       smb work containing smb response buffer
 372  */
 373 static void init_chained_smb2_rsp(struct ksmbd_work *work)
 374 {
 375         struct smb2_hdr *req = ksmbd_req_buf_next(work);
 376         struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
 377         struct smb2_hdr *rsp_hdr;
 378         struct smb2_hdr *rcv_hdr;
 379         int next_hdr_offset = 0;
 380         int len, new_len;
 381
 382         /* Len of this response = updated RFC len - offset of previous cmd
 383          * in the compound rsp
 384          */
 385
 386         /* Storing the current local FID which may be needed by subsequent
 387          * command in the compound request
 388          */
 389         if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
 390                 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
 391                 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
 392                 work->compound_sid = le64_to_cpu(rsp->SessionId);
 393         }
 394
 395         len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
 396         next_hdr_offset = le32_to_cpu(req->NextCommand);
 397
 398         new_len = ALIGN(len, 8);
 399         work->iov[work->iov_idx].iov_len += (new_len - len);
 400         inc_rfc1001_len(work->response_buf, new_len - len);
 401         rsp->NextCommand = cpu_to_le32(new_len);
 402
 403         work->next_smb2_rcv_hdr_off += next_hdr_offset;
 404         work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
 405         work->next_smb2_rsp_hdr_off += new_len;
 406         ksmbd_debug(SMB,
 407                     "Compound req new_len = %d rcv off = %d rsp off = %d\n",
 408                     new_len, work->next_smb2_rcv_hdr_off,
 409                     work->next_smb2_rsp_hdr_off);
 410
 411         rsp_hdr = ksmbd_resp_buf_next(work);
 412         rcv_hdr = ksmbd_req_buf_next(work);
 413
 414         if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
 415                 ksmbd_debug(SMB, "related flag should be set\n");
 416                 work->compound_fid = KSMBD_NO_FID;
 417                 work->compound_pfid = KSMBD_NO_FID;
 418         }
 419         memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 420         rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
 421         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 422         rsp_hdr->Command = rcv_hdr->Command;
 423
 424         /*
 425          * Message is response. We don't grant oplock yet.
 426          */
 427         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
 428                                 SMB2_FLAGS_RELATED_OPERATIONS);
 429         rsp_hdr->NextCommand = 0;
 430         rsp_hdr->MessageId = rcv_hdr->MessageId;
 431         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 432         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 433         rsp_hdr->SessionId = rcv_hdr->SessionId;
 434         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 435 }
 436
 437 /**
 438  * is_chained_smb2_message() - check for chained command
 439  * @work:       smb work containing smb request buffer
 440  *
 441  * Return:      true if chained request, otherwise false
 442  */
 443 bool is_chained_smb2_message(struct ksmbd_work *work)
 444 {
 445         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 446         unsigned int len, next_cmd;
 447
 448         if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
 449                 return false;
 450
 451         hdr = ksmbd_req_buf_next(work);
 452         next_cmd = le32_to_cpu(hdr->NextCommand);
 453         if (next_cmd > 0) {
 454                 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
 455                         __SMB2_HEADER_STRUCTURE_SIZE >
 456                     get_rfc1002_len(work->request_buf)) {
 457                         pr_err("next command(%u) offset exceeds smb msg size\n",
 458                                next_cmd);
 459                         return false;
 460                 }
 461
 462                 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
 463                     work->response_sz) {
 464                         pr_err("next response offset exceeds response buffer size\n");
 465                         return false;
 466                 }
 467
 468                 ksmbd_debug(SMB, "got SMB2 chained command\n");
 469                 init_chained_smb2_rsp(work);
 470                 return true;
 471         } else if (work->next_smb2_rcv_hdr_off) {
 472                 /*
 473                  * This is last request in chained command,
 474                  * align response to 8 byte
 475                  */
 476                 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
 477                 len = len - get_rfc1002_len(work->response_buf);
 478                 if (len) {
 479                         ksmbd_debug(SMB, "padding len %u\n", len);
 480                         work->iov[work->iov_idx].iov_len += len;
 481                         inc_rfc1001_len(work->response_buf, len);
 482                 }
 483                 work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
 484         }
 485         return false;
 486 }
 487
 488 /**
 489  * init_smb2_rsp_hdr() - initialize smb2 response
 490  * @work:       smb work containing smb request buffer
 491  *
 492  * Return:      0
 493  */
 494 int init_smb2_rsp_hdr(struct ksmbd_work *work)
 495 {
 496         struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
 497         struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
 498
 499         memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
 500         rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
 501         rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
 502         rsp_hdr->Command = rcv_hdr->Command;
 503
 504         /*
 505          * Message is response. We don't grant oplock yet.
 506          */
 507         rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
 508         rsp_hdr->NextCommand = 0;
 509         rsp_hdr->MessageId = rcv_hdr->MessageId;
 510         rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
 511         rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
 512         rsp_hdr->SessionId = rcv_hdr->SessionId;
 513         memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
 514
 515         return 0;
 516 }
 517
 518 /**
 519  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
 520  * @work:       smb work containing smb request buffer
 521  *
 522  * Return:      0 on success, otherwise -ENOMEM
 523  */
 524 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
 525 {
 526         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
 527         size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
 528         size_t large_sz = small_sz + work->conn->vals->max_trans_size;
 529         size_t sz = small_sz;
 530         int cmd = le16_to_cpu(hdr->Command);
 531
 532         if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
 533                 sz = large_sz;
 534
 535         if (cmd == SMB2_QUERY_INFO_HE) {
 536                 struct smb2_query_info_req *req;
 537
 538                 req = smb2_get_msg(work->request_buf);
 539                 if ((req->InfoType == SMB2_O_INFO_FILE &&
 540                      (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
 541                      req->FileInfoClass == FILE_ALL_INFORMATION)) ||
 542                     req->InfoType == SMB2_O_INFO_SECURITY)
 543                         sz = large_sz;
 544         }
 545
 546         /* allocate large response buf for chained commands */
 547         if (le32_to_cpu(hdr->NextCommand) > 0)
 548                 sz = large_sz;
 549
 550         work->response_buf = kvzalloc(sz, GFP_KERNEL);
 551         if (!work->response_buf)
 552                 return -ENOMEM;
 553
 554         work->response_sz = sz;
 555         return 0;
 556 }
 557
 558 /**
 559  * smb2_check_user_session() - check for valid session for a user
 560  * @work:       smb work containing smb request buffer
 561  *
 562  * Return:      0 on success, otherwise error
 563  */
 564 int smb2_check_user_session(struct ksmbd_work *work)
 565 {
 566         struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
 567         struct ksmbd_conn *conn = work->conn;
 568         unsigned int cmd = le16_to_cpu(req_hdr->Command);
 569         unsigned long long sess_id;
 570
 571         /*
 572          * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
 573          * require a session id, so no need to validate user session's for
 574          * these commands.
 575          */
 576         if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
 577             cmd == SMB2_SESSION_SETUP_HE)
 578                 return 0;
 579
 580         if (!ksmbd_conn_good(conn))
 581                 return -EIO;
 582
 583         sess_id = le64_to_cpu(req_hdr->SessionId);
 584
 585         /*
 586          * If request is not the first in Compound request,
 587          * Just validate session id in header with work->sess->id.
 588          */
 589         if (work->next_smb2_rcv_hdr_off) {
 590                 if (!work->sess) {
 591                         pr_err("The first operation in the compound does not have sess\n");
 592                         return -EINVAL;
 593                 }
 594                 if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
 595                         pr_err("session id(%llu) is different with the first operation(%lld)\n",
 596                                         sess_id, work->sess->id);
 597                         return -EINVAL;
 598                 }
 599                 return 1;
 600         }
 601
 602         /* Check for validity of user session */
 603         work->sess = ksmbd_session_lookup_all(conn, sess_id);
 604         if (work->sess)
 605                 return 1;
 606         ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
 607         return -ENOENT;
 608 }
 609
 610 static void destroy_previous_session(struct ksmbd_conn *conn,
 611                                      struct ksmbd_user *user, u64 id)
 612 {
 613         struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
 614         struct ksmbd_user *prev_user;
 615         struct channel *chann;
 616         long index;
 617
 618         if (!prev_sess)
 619                 return;
 620
 621         prev_user = prev_sess->user;
 622
 623         if (!prev_user ||
 624             strcmp(user->name, prev_user->name) ||
 625             user->passkey_sz != prev_user->passkey_sz ||
 626             memcmp(user->passkey, prev_user->passkey, user->passkey_sz))
 627                 return;
 628
 629         prev_sess->state = SMB2_SESSION_EXPIRED;
 630         xa_for_each(&prev_sess->ksmbd_chann_list, index, chann)
 631                 ksmbd_conn_set_exiting(chann->conn);
 632 }
 633
 634 /**
 635  * smb2_get_name() - get filename string from on the wire smb format
 636  * @src:        source buffer
 637  * @maxlen:     maxlen of source string
 638  * @local_nls:  nls_table pointer
 639  *
 640  * Return:      matching converted filename on success, otherwise error ptr
 641  */
 642 static char *
 643 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
 644 {
 645         char *name;
 646
 647         name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
 648         if (IS_ERR(name)) {
 649                 pr_err("failed to get name %ld\n", PTR_ERR(name));
 650                 return name;
 651         }
 652
 653         ksmbd_conv_path_to_unix(name);
 654         ksmbd_strip_last_slash(name);
 655         return name;
 656 }
 657
 658 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
 659 {
 660         struct ksmbd_conn *conn = work->conn;
 661         int id;
 662
 663         id = ksmbd_acquire_async_msg_id(&conn->async_ida);
 664         if (id < 0) {
 665                 pr_err("Failed to alloc async message id\n");
 666                 return id;
 667         }
 668         work->asynchronous = true;
 669         work->async_id = id;
 670
 671         ksmbd_debug(SMB,
 672                     "Send interim Response to inform async request id : %d\n",
 673                     work->async_id);
 674
 675         work->cancel_fn = fn;
 676         work->cancel_argv = arg;
 677
 678         if (list_empty(&work->async_request_entry)) {
 679                 spin_lock(&conn->request_lock);
 680                 list_add_tail(&work->async_request_entry, &conn->async_requests);
 681                 spin_unlock(&conn->request_lock);
 682         }
 683
 684         return 0;
 685 }
 686
 687 void release_async_work(struct ksmbd_work *work)
 688 {
 689         struct ksmbd_conn *conn = work->conn;
 690
 691         spin_lock(&conn->request_lock);
 692         list_del_init(&work->async_request_entry);
 693         spin_unlock(&conn->request_lock);
 694
 695         work->asynchronous = 0;
 696         work->cancel_fn = NULL;
 697         kfree(work->cancel_argv);
 698         work->cancel_argv = NULL;
 699         if (work->async_id) {
 700                 ksmbd_release_id(&conn->async_ida, work->async_id);
 701                 work->async_id = 0;
 702         }
 703 }
 704
 705 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
 706 {
 707         struct smb2_hdr *rsp_hdr;
 708         struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
 709
 710         if (allocate_interim_rsp_buf(in_work)) {
 711                 pr_err("smb_allocate_rsp_buf failed!\n");
 712                 ksmbd_free_work_struct(in_work);
 713                 return;
 714         }
 715
 716         in_work->conn = work->conn;
 717         memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
 718                __SMB2_HEADER_STRUCTURE_SIZE);
 719
 720         rsp_hdr = smb2_get_msg(in_work->response_buf);
 721         rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
 722         rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
 723         smb2_set_err_rsp(in_work);
 724         rsp_hdr->Status = status;
 725
 726         ksmbd_conn_write(in_work);
 727         ksmbd_free_work_struct(in_work);
 728 }
 729
 730 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
 731 {
 732         if (S_ISDIR(mode) || S_ISREG(mode))
 733                 return 0;
 734
 735         if (S_ISLNK(mode))
 736                 return IO_REPARSE_TAG_LX_SYMLINK_LE;
 737         else if (S_ISFIFO(mode))
 738                 return IO_REPARSE_TAG_LX_FIFO_LE;
 739         else if (S_ISSOCK(mode))
 740                 return IO_REPARSE_TAG_AF_UNIX_LE;
 741         else if (S_ISCHR(mode))
 742                 return IO_REPARSE_TAG_LX_CHR_LE;
 743         else if (S_ISBLK(mode))
 744                 return IO_REPARSE_TAG_LX_BLK_LE;
 745
 746         return 0;
 747 }
 748
 749 /**
 750  * smb2_get_dos_mode() - get file mode in dos format from unix mode
 751  * @stat:       kstat containing file mode
 752  * @attribute:  attribute flags
 753  *
 754  * Return:      converted dos mode
 755  */
 756 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
 757 {
 758         int attr = 0;
 759
 760         if (S_ISDIR(stat->mode)) {
 761                 attr = FILE_ATTRIBUTE_DIRECTORY |
 762                         (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
 763         } else {
 764                 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
 765                 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
 766                 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
 767                                 FILE_SUPPORTS_SPARSE_FILES))
 768                         attr |= FILE_ATTRIBUTE_SPARSE_FILE;
 769
 770                 if (smb2_get_reparse_tag_special_file(stat->mode))
 771                         attr |= FILE_ATTRIBUTE_REPARSE_POINT;
 772         }
 773
 774         return attr;
 775 }
 776
 777 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
 778                                __le16 hash_id)
 779 {
 780         pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
 781         pneg_ctxt->DataLength = cpu_to_le16(38);
 782         pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
 783         pneg_ctxt->Reserved = cpu_to_le32(0);
 784         pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
 785         get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
 786         pneg_ctxt->HashAlgorithms = hash_id;
 787 }
 788
 789 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
 790                                __le16 cipher_type)
 791 {
 792         pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
 793         pneg_ctxt->DataLength = cpu_to_le16(4);
 794         pneg_ctxt->Reserved = cpu_to_le32(0);
 795         pneg_ctxt->CipherCount = cpu_to_le16(1);
 796         pneg_ctxt->Ciphers[0] = cipher_type;
 797 }
 798
 799 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
 800                                 __le16 sign_algo)
 801 {
 802         pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
 803         pneg_ctxt->DataLength =
 804                 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
 805                         - sizeof(struct smb2_neg_context));
 806         pneg_ctxt->Reserved = cpu_to_le32(0);
 807         pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
 808         pneg_ctxt->SigningAlgorithms[0] = sign_algo;
 809 }
 810
 811 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 812 {
 813         pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 814         pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
 815         /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
 816         pneg_ctxt->Name[0] = 0x93;
 817         pneg_ctxt->Name[1] = 0xAD;
 818         pneg_ctxt->Name[2] = 0x25;
 819         pneg_ctxt->Name[3] = 0x50;
 820         pneg_ctxt->Name[4] = 0x9C;
 821         pneg_ctxt->Name[5] = 0xB4;
 822         pneg_ctxt->Name[6] = 0x11;
 823         pneg_ctxt->Name[7] = 0xE7;
 824         pneg_ctxt->Name[8] = 0xB4;
 825         pneg_ctxt->Name[9] = 0x23;
 826         pneg_ctxt->Name[10] = 0x83;
 827         pneg_ctxt->Name[11] = 0xDE;
 828         pneg_ctxt->Name[12] = 0x96;
 829         pneg_ctxt->Name[13] = 0x8B;
 830         pneg_ctxt->Name[14] = 0xCD;
 831         pneg_ctxt->Name[15] = 0x7C;
 832 }
 833
 834 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
 835                                   struct smb2_negotiate_rsp *rsp)
 836 {
 837         char * const pneg_ctxt = (char *)rsp +
 838                         le32_to_cpu(rsp->NegotiateContextOffset);
 839         int neg_ctxt_cnt = 1;
 840         int ctxt_size;
 841
 842         ksmbd_debug(SMB,
 843                     "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
 844         build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
 845                            conn->preauth_info->Preauth_HashId);
 846         ctxt_size = sizeof(struct smb2_preauth_neg_context);
 847
 848         if (conn->cipher_type) {
 849                 /* Round to 8 byte boundary */
 850                 ctxt_size = round_up(ctxt_size, 8);
 851                 ksmbd_debug(SMB,
 852                             "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
 853                 build_encrypt_ctxt((struct smb2_encryption_neg_context *)
 854                                    (pneg_ctxt + ctxt_size),
 855                                    conn->cipher_type);
 856                 neg_ctxt_cnt++;
 857                 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
 858         }
 859
 860         /* compression context not yet supported */
 861         WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
 862
 863         if (conn->posix_ext_supported) {
 864                 ctxt_size = round_up(ctxt_size, 8);
 865                 ksmbd_debug(SMB,
 866                             "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
 867                 build_posix_ctxt((struct smb2_posix_neg_context *)
 868                                  (pneg_ctxt + ctxt_size));
 869                 neg_ctxt_cnt++;
 870                 ctxt_size += sizeof(struct smb2_posix_neg_context);
 871         }
 872
 873         if (conn->signing_negotiated) {
 874                 ctxt_size = round_up(ctxt_size, 8);
 875                 ksmbd_debug(SMB,
 876                             "assemble SMB2_SIGNING_CAPABILITIES context\n");
 877                 build_sign_cap_ctxt((struct smb2_signing_capabilities *)
 878                                     (pneg_ctxt + ctxt_size),
 879                                     conn->signing_algorithm);
 880                 neg_ctxt_cnt++;
 881                 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
 882         }
 883
 884         rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
 885         return ctxt_size + AUTH_GSS_PADDING;
 886 }
 887
 888 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
 889                                   struct smb2_preauth_neg_context *pneg_ctxt,
 890                                   int ctxt_len)
 891 {
 892         /*
 893          * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
 894          * which may not be present. Only check for used HashAlgorithms[1].
 895          */
 896         if (ctxt_len <
 897             sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
 898                 return STATUS_INVALID_PARAMETER;
 899
 900         if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
 901                 return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
 902
 903         conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
 904         return STATUS_SUCCESS;
 905 }
 906
 907 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
 908                                 struct smb2_encryption_neg_context *pneg_ctxt,
 909                                 int ctxt_len)
 910 {
 911         int cph_cnt;
 912         int i, cphs_size;
 913
 914         if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
 915                 pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
 916                 return;
 917         }
 918
 919         conn->cipher_type = 0;
 920
 921         cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
 922         cphs_size = cph_cnt * sizeof(__le16);
 923
 924         if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
 925             ctxt_len) {
 926                 pr_err("Invalid cipher count(%d)\n", cph_cnt);
 927                 return;
 928         }
 929
 930         if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
 931                 return;
 932
 933         for (i = 0; i < cph_cnt; i++) {
 934                 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
 935                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
 936                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
 937                     pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
 938                         ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
 939                                     pneg_ctxt->Ciphers[i]);
 940                         conn->cipher_type = pneg_ctxt->Ciphers[i];
 941                         break;
 942                 }
 943         }
 944 }
 945
 946 /**
 947  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
 948  * @conn:       smb connection
 949  *
 950  * Return:      true if connection should be encrypted, else false
 951  */
 952 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
 953 {
 954         if (!conn->ops->generate_encryptionkey)
 955                 return false;
 956
 957         /*
 958          * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
 959          * SMB 3.1.1 uses the cipher_type field.
 960          */
 961         return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
 962             conn->cipher_type;
 963 }
 964
 965 static void decode_compress_ctxt(struct ksmbd_conn *conn,
 966                                  struct smb2_compression_capabilities_context *pneg_ctxt)
 967 {
 968         conn->compress_algorithm = SMB3_COMPRESS_NONE;
 969 }
 970
 971 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
 972                                  struct smb2_signing_capabilities *pneg_ctxt,
 973                                  int ctxt_len)
 974 {
 975         int sign_algo_cnt;
 976         int i, sign_alos_size;
 977
 978         if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
 979                 pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
 980                 return;
 981         }
 982
 983         conn->signing_negotiated = false;
 984         sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
 985         sign_alos_size = sign_algo_cnt * sizeof(__le16);
 986
 987         if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
 988             ctxt_len) {
 989                 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
 990                 return;
 991         }
 992
 993         for (i = 0; i < sign_algo_cnt; i++) {
 994                 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
 995                     pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
 996                         ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
 997                                     pneg_ctxt->SigningAlgorithms[i]);
 998                         conn->signing_negotiated = true;
 999                         conn->signing_algorithm =
1000                                 pneg_ctxt->SigningAlgorithms[i];
1001                         break;
1002                 }
1003         }
1004 }
1005
1006 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
1007                                       struct smb2_negotiate_req *req,
1008                                       unsigned int len_of_smb)
1009 {
1010         /* +4 is to account for the RFC1001 len field */
1011         struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
1012         int i = 0, len_of_ctxts;
1013         unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1014         unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1015         __le32 status = STATUS_INVALID_PARAMETER;
1016
1017         ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1018         if (len_of_smb <= offset) {
1019                 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1020                 return status;
1021         }
1022
1023         len_of_ctxts = len_of_smb - offset;
1024
1025         while (i++ < neg_ctxt_cnt) {
1026                 int clen, ctxt_len;
1027
1028                 if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1029                         break;
1030
1031                 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1032                 clen = le16_to_cpu(pctx->DataLength);
1033                 ctxt_len = clen + sizeof(struct smb2_neg_context);
1034
1035                 if (ctxt_len > len_of_ctxts)
1036                         break;
1037
1038                 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1039                         ksmbd_debug(SMB,
1040                                     "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1041                         if (conn->preauth_info->Preauth_HashId)
1042                                 break;
1043
1044                         status = decode_preauth_ctxt(conn,
1045                                                      (struct smb2_preauth_neg_context *)pctx,
1046                                                      ctxt_len);
1047                         if (status != STATUS_SUCCESS)
1048                                 break;
1049                 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1050                         ksmbd_debug(SMB,
1051                                     "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1052                         if (conn->cipher_type)
1053                                 break;
1054
1055                         decode_encrypt_ctxt(conn,
1056                                             (struct smb2_encryption_neg_context *)pctx,
1057                                             ctxt_len);
1058                 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1059                         ksmbd_debug(SMB,
1060                                     "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1061                         if (conn->compress_algorithm)
1062                                 break;
1063
1064                         decode_compress_ctxt(conn,
1065                                              (struct smb2_compression_capabilities_context *)pctx);
1066                 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1067                         ksmbd_debug(SMB,
1068                                     "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1069                 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1070                         ksmbd_debug(SMB,
1071                                     "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1072                         conn->posix_ext_supported = true;
1073                 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1074                         ksmbd_debug(SMB,
1075                                     "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1076
1077                         decode_sign_cap_ctxt(conn,
1078                                              (struct smb2_signing_capabilities *)pctx,
1079                                              ctxt_len);
1080                 }
1081
1082                 /* offsets must be 8 byte aligned */
1083                 offset = (ctxt_len + 7) & ~0x7;
1084                 len_of_ctxts -= offset;
1085         }
1086         return status;
1087 }
1088
1089 /**
1090  * smb2_handle_negotiate() - handler for smb2 negotiate command
1091  * @work:       smb work containing smb request buffer
1092  *
1093  * Return:      0
1094  */
1095 int smb2_handle_negotiate(struct ksmbd_work *work)
1096 {
1097         struct ksmbd_conn *conn = work->conn;
1098         struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1099         struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1100         int rc = 0;
1101         unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1102         __le32 status;
1103
1104         ksmbd_debug(SMB, "Received negotiate request\n");
1105         conn->need_neg = false;
1106         if (ksmbd_conn_good(conn)) {
1107                 pr_err("conn->tcp_status is already in CifsGood State\n");
1108                 work->send_no_response = 1;
1109                 return rc;
1110         }
1111
1112         smb2_buf_len = get_rfc1002_len(work->request_buf);
1113         smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1114         if (smb2_neg_size > smb2_buf_len) {
1115                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1116                 rc = -EINVAL;
1117                 goto err_out;
1118         }
1119
1120         if (req->DialectCount == 0) {
1121                 pr_err("malformed packet\n");
1122                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1123                 rc = -EINVAL;
1124                 goto err_out;
1125         }
1126
1127         if (conn->dialect == SMB311_PROT_ID) {
1128                 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1129
1130                 if (smb2_buf_len < nego_ctxt_off) {
1131                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1132                         rc = -EINVAL;
1133                         goto err_out;
1134                 }
1135
1136                 if (smb2_neg_size > nego_ctxt_off) {
1137                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1138                         rc = -EINVAL;
1139                         goto err_out;
1140                 }
1141
1142                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1143                     nego_ctxt_off) {
1144                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1145                         rc = -EINVAL;
1146                         goto err_out;
1147                 }
1148         } else {
1149                 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1150                     smb2_buf_len) {
1151                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1152                         rc = -EINVAL;
1153                         goto err_out;
1154                 }
1155         }
1156
1157         conn->cli_cap = le32_to_cpu(req->Capabilities);
1158         switch (conn->dialect) {
1159         case SMB311_PROT_ID:
1160                 conn->preauth_info =
1161                         kzalloc(sizeof(struct preauth_integrity_info),
1162                                 GFP_KERNEL);
1163                 if (!conn->preauth_info) {
1164                         rc = -ENOMEM;
1165                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1166                         goto err_out;
1167                 }
1168
1169                 status = deassemble_neg_contexts(conn, req,
1170                                                  get_rfc1002_len(work->request_buf));
1171                 if (status != STATUS_SUCCESS) {
1172                         pr_err("deassemble_neg_contexts error(0x%x)\n",
1173                                status);
1174                         rsp->hdr.Status = status;
1175                         rc = -EINVAL;
1176                         kfree(conn->preauth_info);
1177                         conn->preauth_info = NULL;
1178                         goto err_out;
1179                 }
1180
1181                 rc = init_smb3_11_server(conn);
1182                 if (rc < 0) {
1183                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1184                         kfree(conn->preauth_info);
1185                         conn->preauth_info = NULL;
1186                         goto err_out;
1187                 }
1188
1189                 ksmbd_gen_preauth_integrity_hash(conn,
1190                                                  work->request_buf,
1191                                                  conn->preauth_info->Preauth_HashValue);
1192                 rsp->NegotiateContextOffset =
1193                                 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1194                 neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1195                 break;
1196         case SMB302_PROT_ID:
1197                 init_smb3_02_server(conn);
1198                 break;
1199         case SMB30_PROT_ID:
1200                 init_smb3_0_server(conn);
1201                 break;
1202         case SMB21_PROT_ID:
1203                 init_smb2_1_server(conn);
1204                 break;
1205         case SMB2X_PROT_ID:
1206         case BAD_PROT_ID:
1207         default:
1208                 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1209                             conn->dialect);
1210                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1211                 rc = -EINVAL;
1212                 goto err_out;
1213         }
1214         rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1215
1216         /* For stats */
1217         conn->connection_type = conn->dialect;
1218
1219         rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1220         rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1221         rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1222
1223         memcpy(conn->ClientGUID, req->ClientGUID,
1224                         SMB2_CLIENT_GUID_SIZE);
1225         conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1226
1227         rsp->StructureSize = cpu_to_le16(65);
1228         rsp->DialectRevision = cpu_to_le16(conn->dialect);
1229         /* Not setting conn guid rsp->ServerGUID, as it
1230          * not used by client for identifying server
1231          */
1232         memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1233
1234         rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1235         rsp->ServerStartTime = 0;
1236         ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1237                     le32_to_cpu(rsp->NegotiateContextOffset),
1238                     le16_to_cpu(rsp->NegotiateContextCount));
1239
1240         rsp->SecurityBufferOffset = cpu_to_le16(128);
1241         rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1242         ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1243                                   le16_to_cpu(rsp->SecurityBufferOffset));
1244
1245         rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1246         conn->use_spnego = true;
1247
1248         if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1249              server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1250             req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1251                 conn->sign = true;
1252         else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1253                 server_conf.enforced_signing = true;
1254                 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1255                 conn->sign = true;
1256         }
1257
1258         conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1259         ksmbd_conn_set_need_negotiate(conn);
1260
1261 err_out:
1262         if (rc)
1263                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1264
1265         if (!rc)
1266                 rc = ksmbd_iov_pin_rsp(work, rsp,
1267                                        sizeof(struct smb2_negotiate_rsp) +
1268                                         AUTH_GSS_LENGTH + neg_ctxt_len);
1269         if (rc < 0)
1270                 smb2_set_err_rsp(work);
1271         return rc;
1272 }
1273
1274 static int alloc_preauth_hash(struct ksmbd_session *sess,
1275                               struct ksmbd_conn *conn)
1276 {
1277         if (sess->Preauth_HashValue)
1278                 return 0;
1279
1280         sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1281                                           PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1282         if (!sess->Preauth_HashValue)
1283                 return -ENOMEM;
1284
1285         return 0;
1286 }
1287
1288 static int generate_preauth_hash(struct ksmbd_work *work)
1289 {
1290         struct ksmbd_conn *conn = work->conn;
1291         struct ksmbd_session *sess = work->sess;
1292         u8 *preauth_hash;
1293
1294         if (conn->dialect != SMB311_PROT_ID)
1295                 return 0;
1296
1297         if (conn->binding) {
1298                 struct preauth_session *preauth_sess;
1299
1300                 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1301                 if (!preauth_sess) {
1302                         preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1303                         if (!preauth_sess)
1304                                 return -ENOMEM;
1305                 }
1306
1307                 preauth_hash = preauth_sess->Preauth_HashValue;
1308         } else {
1309                 if (!sess->Preauth_HashValue)
1310                         if (alloc_preauth_hash(sess, conn))
1311                                 return -ENOMEM;
1312                 preauth_hash = sess->Preauth_HashValue;
1313         }
1314
1315         ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1316         return 0;
1317 }
1318
1319 static int decode_negotiation_token(struct ksmbd_conn *conn,
1320                                     struct negotiate_message *negblob,
1321                                     size_t sz)
1322 {
1323         if (!conn->use_spnego)
1324                 return -EINVAL;
1325
1326         if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1327                 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1328                         conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1329                         conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1330                         conn->use_spnego = false;
1331                 }
1332         }
1333         return 0;
1334 }
1335
1336 static int ntlm_negotiate(struct ksmbd_work *work,
1337                           struct negotiate_message *negblob,
1338                           size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1339 {
1340         struct challenge_message *chgblob;
1341         unsigned char *spnego_blob = NULL;
1342         u16 spnego_blob_len;
1343         char *neg_blob;
1344         int sz, rc;
1345
1346         ksmbd_debug(SMB, "negotiate phase\n");
1347         rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1348         if (rc)
1349                 return rc;
1350
1351         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1352         chgblob =
1353                 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1354         memset(chgblob, 0, sizeof(struct challenge_message));
1355
1356         if (!work->conn->use_spnego) {
1357                 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1358                 if (sz < 0)
1359                         return -ENOMEM;
1360
1361                 rsp->SecurityBufferLength = cpu_to_le16(sz);
1362                 return 0;
1363         }
1364
1365         sz = sizeof(struct challenge_message);
1366         sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1367
1368         neg_blob = kzalloc(sz, GFP_KERNEL);
1369         if (!neg_blob)
1370                 return -ENOMEM;
1371
1372         chgblob = (struct challenge_message *)neg_blob;
1373         sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1374         if (sz < 0) {
1375                 rc = -ENOMEM;
1376                 goto out;
1377         }
1378
1379         rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1380                                            neg_blob, sz);
1381         if (rc) {
1382                 rc = -ENOMEM;
1383                 goto out;
1384         }
1385
1386         sz = le16_to_cpu(rsp->SecurityBufferOffset);
1387         memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1388         rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1389
1390 out:
1391         kfree(spnego_blob);
1392         kfree(neg_blob);
1393         return rc;
1394 }
1395
1396 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1397                                                   struct smb2_sess_setup_req *req)
1398 {
1399         int sz;
1400
1401         if (conn->use_spnego && conn->mechToken)
1402                 return (struct authenticate_message *)conn->mechToken;
1403
1404         sz = le16_to_cpu(req->SecurityBufferOffset);
1405         return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1406                                                + sz);
1407 }
1408
1409 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1410                                        struct smb2_sess_setup_req *req)
1411 {
1412         struct authenticate_message *authblob;
1413         struct ksmbd_user *user;
1414         char *name;
1415         unsigned int name_off, name_len, secbuf_len;
1416
1417         secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1418         if (secbuf_len < sizeof(struct authenticate_message)) {
1419                 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1420                 return NULL;
1421         }
1422         authblob = user_authblob(conn, req);
1423         name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1424         name_len = le16_to_cpu(authblob->UserName.Length);
1425
1426         if (secbuf_len < (u64)name_off + name_len)
1427                 return NULL;
1428
1429         name = smb_strndup_from_utf16((const char *)authblob + name_off,
1430                                       name_len,
1431                                       true,
1432                                       conn->local_nls);
1433         if (IS_ERR(name)) {
1434                 pr_err("cannot allocate memory\n");
1435                 return NULL;
1436         }
1437
1438         ksmbd_debug(SMB, "session setup request for user %s\n", name);
1439         user = ksmbd_login_user(name);
1440         kfree(name);
1441         return user;
1442 }
1443
1444 static int ntlm_authenticate(struct ksmbd_work *work,
1445                              struct smb2_sess_setup_req *req,
1446                              struct smb2_sess_setup_rsp *rsp)
1447 {
1448         struct ksmbd_conn *conn = work->conn;
1449         struct ksmbd_session *sess = work->sess;
1450         struct channel *chann = NULL;
1451         struct ksmbd_user *user;
1452         u64 prev_id;
1453         int sz, rc;
1454
1455         ksmbd_debug(SMB, "authenticate phase\n");
1456         if (conn->use_spnego) {
1457                 unsigned char *spnego_blob;
1458                 u16 spnego_blob_len;
1459
1460                 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1461                                                     &spnego_blob_len,
1462                                                     0);
1463                 if (rc)
1464                         return -ENOMEM;
1465
1466                 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1467                 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1468                 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1469                 kfree(spnego_blob);
1470         }
1471
1472         user = session_user(conn, req);
1473         if (!user) {
1474                 ksmbd_debug(SMB, "Unknown user name or an error\n");
1475                 return -EPERM;
1476         }
1477
1478         /* Check for previous session */
1479         prev_id = le64_to_cpu(req->PreviousSessionId);
1480         if (prev_id && prev_id != sess->id)
1481                 destroy_previous_session(conn, user, prev_id);
1482
1483         if (sess->state == SMB2_SESSION_VALID) {
1484                 /*
1485                  * Reuse session if anonymous try to connect
1486                  * on reauthetication.
1487                  */
1488                 if (conn->binding == false && ksmbd_anonymous_user(user)) {
1489                         ksmbd_free_user(user);
1490                         return 0;
1491                 }
1492
1493                 if (!ksmbd_compare_user(sess->user, user)) {
1494                         ksmbd_free_user(user);
1495                         return -EPERM;
1496                 }
1497                 ksmbd_free_user(user);
1498         } else {
1499                 sess->user = user;
1500         }
1501
1502         if (conn->binding == false && user_guest(sess->user)) {
1503                 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1504         } else {
1505                 struct authenticate_message *authblob;
1506
1507                 authblob = user_authblob(conn, req);
1508                 sz = le16_to_cpu(req->SecurityBufferLength);
1509                 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1510                 if (rc) {
1511                         set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1512                         ksmbd_debug(SMB, "authentication failed\n");
1513                         return -EPERM;
1514                 }
1515         }
1516
1517         /*
1518          * If session state is SMB2_SESSION_VALID, We can assume
1519          * that it is reauthentication. And the user/password
1520          * has been verified, so return it here.
1521          */
1522         if (sess->state == SMB2_SESSION_VALID) {
1523                 if (conn->binding)
1524                         goto binding_session;
1525                 return 0;
1526         }
1527
1528         if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1529              (conn->sign || server_conf.enforced_signing)) ||
1530             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1531                 sess->sign = true;
1532
1533         if (smb3_encryption_negotiated(conn) &&
1534                         !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1535                 rc = conn->ops->generate_encryptionkey(conn, sess);
1536                 if (rc) {
1537                         ksmbd_debug(SMB,
1538                                         "SMB3 encryption key generation failed\n");
1539                         return -EINVAL;
1540                 }
1541                 sess->enc = true;
1542                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1543                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1544                 /*
1545                  * signing is disable if encryption is enable
1546                  * on this session
1547                  */
1548                 sess->sign = false;
1549         }
1550
1551 binding_session:
1552         if (conn->dialect >= SMB30_PROT_ID) {
1553                 chann = lookup_chann_list(sess, conn);
1554                 if (!chann) {
1555                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1556                         if (!chann)
1557                                 return -ENOMEM;
1558
1559                         chann->conn = conn;
1560                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1561                 }
1562         }
1563
1564         if (conn->ops->generate_signingkey) {
1565                 rc = conn->ops->generate_signingkey(sess, conn);
1566                 if (rc) {
1567                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1568                         return -EINVAL;
1569                 }
1570         }
1571
1572         if (!ksmbd_conn_lookup_dialect(conn)) {
1573                 pr_err("fail to verify the dialect\n");
1574                 return -ENOENT;
1575         }
1576         return 0;
1577 }
1578
1579 #ifdef CONFIG_SMB_SERVER_KERBEROS5
1580 static int krb5_authenticate(struct ksmbd_work *work,
1581                              struct smb2_sess_setup_req *req,
1582                              struct smb2_sess_setup_rsp *rsp)
1583 {
1584         struct ksmbd_conn *conn = work->conn;
1585         struct ksmbd_session *sess = work->sess;
1586         char *in_blob, *out_blob;
1587         struct channel *chann = NULL;
1588         u64 prev_sess_id;
1589         int in_len, out_len;
1590         int retval;
1591
1592         in_blob = (char *)&req->hdr.ProtocolId +
1593                 le16_to_cpu(req->SecurityBufferOffset);
1594         in_len = le16_to_cpu(req->SecurityBufferLength);
1595         out_blob = (char *)&rsp->hdr.ProtocolId +
1596                 le16_to_cpu(rsp->SecurityBufferOffset);
1597         out_len = work->response_sz -
1598                 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1599
1600         /* Check previous session */
1601         prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1602         if (prev_sess_id && prev_sess_id != sess->id)
1603                 destroy_previous_session(conn, sess->user, prev_sess_id);
1604
1605         if (sess->state == SMB2_SESSION_VALID)
1606                 ksmbd_free_user(sess->user);
1607
1608         retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1609                                          out_blob, &out_len);
1610         if (retval) {
1611                 ksmbd_debug(SMB, "krb5 authentication failed\n");
1612                 return -EINVAL;
1613         }
1614         rsp->SecurityBufferLength = cpu_to_le16(out_len);
1615
1616         if ((conn->sign || server_conf.enforced_signing) ||
1617             (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1618                 sess->sign = true;
1619
1620         if (smb3_encryption_negotiated(conn)) {
1621                 retval = conn->ops->generate_encryptionkey(conn, sess);
1622                 if (retval) {
1623                         ksmbd_debug(SMB,
1624                                     "SMB3 encryption key generation failed\n");
1625                         return -EINVAL;
1626                 }
1627                 sess->enc = true;
1628                 if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1629                         rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1630                 sess->sign = false;
1631         }
1632
1633         if (conn->dialect >= SMB30_PROT_ID) {
1634                 chann = lookup_chann_list(sess, conn);
1635                 if (!chann) {
1636                         chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1637                         if (!chann)
1638                                 return -ENOMEM;
1639
1640                         chann->conn = conn;
1641                         xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1642                 }
1643         }
1644
1645         if (conn->ops->generate_signingkey) {
1646                 retval = conn->ops->generate_signingkey(sess, conn);
1647                 if (retval) {
1648                         ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1649                         return -EINVAL;
1650                 }
1651         }
1652
1653         if (!ksmbd_conn_lookup_dialect(conn)) {
1654                 pr_err("fail to verify the dialect\n");
1655                 return -ENOENT;
1656         }
1657         return 0;
1658 }
1659 #else
1660 static int krb5_authenticate(struct ksmbd_work *work,
1661                              struct smb2_sess_setup_req *req,
1662                              struct smb2_sess_setup_rsp *rsp)
1663 {
1664         return -EOPNOTSUPP;
1665 }
1666 #endif
1667
1668 int smb2_sess_setup(struct ksmbd_work *work)
1669 {
1670         struct ksmbd_conn *conn = work->conn;
1671         struct smb2_sess_setup_req *req;
1672         struct smb2_sess_setup_rsp *rsp;
1673         struct ksmbd_session *sess;
1674         struct negotiate_message *negblob;
1675         unsigned int negblob_len, negblob_off;
1676         int rc = 0;
1677
1678         ksmbd_debug(SMB, "Received request for session setup\n");
1679
1680         WORK_BUFFERS(work, req, rsp);
1681
1682         rsp->StructureSize = cpu_to_le16(9);
1683         rsp->SessionFlags = 0;
1684         rsp->SecurityBufferOffset = cpu_to_le16(72);
1685         rsp->SecurityBufferLength = 0;
1686
1687         ksmbd_conn_lock(conn);
1688         if (!req->hdr.SessionId) {
1689                 sess = ksmbd_smb2_session_create();
1690                 if (!sess) {
1691                         rc = -ENOMEM;
1692                         goto out_err;
1693                 }
1694                 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1695                 rc = ksmbd_session_register(conn, sess);
1696                 if (rc)
1697                         goto out_err;
1698         } else if (conn->dialect >= SMB30_PROT_ID &&
1699                    (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1700                    req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1701                 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1702
1703                 sess = ksmbd_session_lookup_slowpath(sess_id);
1704                 if (!sess) {
1705                         rc = -ENOENT;
1706                         goto out_err;
1707                 }
1708
1709                 if (conn->dialect != sess->dialect) {
1710                         rc = -EINVAL;
1711                         goto out_err;
1712                 }
1713
1714                 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1715                         rc = -EINVAL;
1716                         goto out_err;
1717                 }
1718
1719                 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1720                             SMB2_CLIENT_GUID_SIZE)) {
1721                         rc = -ENOENT;
1722                         goto out_err;
1723                 }
1724
1725                 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1726                         rc = -EACCES;
1727                         goto out_err;
1728                 }
1729
1730                 if (sess->state == SMB2_SESSION_EXPIRED) {
1731                         rc = -EFAULT;
1732                         goto out_err;
1733                 }
1734
1735                 if (ksmbd_conn_need_reconnect(conn)) {
1736                         rc = -EFAULT;
1737                         sess = NULL;
1738                         goto out_err;
1739                 }
1740
1741                 if (ksmbd_session_lookup(conn, sess_id)) {
1742                         rc = -EACCES;
1743                         goto out_err;
1744                 }
1745
1746                 if (user_guest(sess->user)) {
1747                         rc = -EOPNOTSUPP;
1748                         goto out_err;
1749                 }
1750
1751                 conn->binding = true;
1752         } else if ((conn->dialect < SMB30_PROT_ID ||
1753                     server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1754                    (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1755                 sess = NULL;
1756                 rc = -EACCES;
1757                 goto out_err;
1758         } else {
1759                 sess = ksmbd_session_lookup(conn,
1760                                             le64_to_cpu(req->hdr.SessionId));
1761                 if (!sess) {
1762                         rc = -ENOENT;
1763                         goto out_err;
1764                 }
1765
1766                 if (sess->state == SMB2_SESSION_EXPIRED) {
1767                         rc = -EFAULT;
1768                         goto out_err;
1769                 }
1770
1771                 if (ksmbd_conn_need_reconnect(conn)) {
1772                         rc = -EFAULT;
1773                         sess = NULL;
1774                         goto out_err;
1775                 }
1776         }
1777         work->sess = sess;
1778
1779         negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1780         negblob_len = le16_to_cpu(req->SecurityBufferLength);
1781         if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
1782             negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1783                 rc = -EINVAL;
1784                 goto out_err;
1785         }
1786
1787         negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1788                         negblob_off);
1789
1790         if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1791                 if (conn->mechToken)
1792                         negblob = (struct negotiate_message *)conn->mechToken;
1793         }
1794
1795         if (server_conf.auth_mechs & conn->auth_mechs) {
1796                 rc = generate_preauth_hash(work);
1797                 if (rc)
1798                         goto out_err;
1799
1800                 if (conn->preferred_auth_mech &
1801                                 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1802                         rc = krb5_authenticate(work, req, rsp);
1803                         if (rc) {
1804                                 rc = -EINVAL;
1805                                 goto out_err;
1806                         }
1807
1808                         if (!ksmbd_conn_need_reconnect(conn)) {
1809                                 ksmbd_conn_set_good(conn);
1810                                 sess->state = SMB2_SESSION_VALID;
1811                         }
1812                         kfree(sess->Preauth_HashValue);
1813                         sess->Preauth_HashValue = NULL;
1814                 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1815                         if (negblob->MessageType == NtLmNegotiate) {
1816                                 rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1817                                 if (rc)
1818                                         goto out_err;
1819                                 rsp->hdr.Status =
1820                                         STATUS_MORE_PROCESSING_REQUIRED;
1821                         } else if (negblob->MessageType == NtLmAuthenticate) {
1822                                 rc = ntlm_authenticate(work, req, rsp);
1823                                 if (rc)
1824                                         goto out_err;
1825
1826                                 if (!ksmbd_conn_need_reconnect(conn)) {
1827                                         ksmbd_conn_set_good(conn);
1828                                         sess->state = SMB2_SESSION_VALID;
1829                                 }
1830                                 if (conn->binding) {
1831                                         struct preauth_session *preauth_sess;
1832
1833                                         preauth_sess =
1834                                                 ksmbd_preauth_session_lookup(conn, sess->id);
1835                                         if (preauth_sess) {
1836                                                 list_del(&preauth_sess->preauth_entry);
1837                                                 kfree(preauth_sess);
1838                                         }
1839                                 }
1840                                 kfree(sess->Preauth_HashValue);
1841                                 sess->Preauth_HashValue = NULL;
1842                         } else {
1843                                 pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1844                                                 le32_to_cpu(negblob->MessageType));
1845                                 rc = -EINVAL;
1846                         }
1847                 } else {
1848                         /* TODO: need one more negotiation */
1849                         pr_err("Not support the preferred authentication\n");
1850                         rc = -EINVAL;
1851                 }
1852         } else {
1853                 pr_err("Not support authentication\n");
1854                 rc = -EINVAL;
1855         }
1856
1857 out_err:
1858         if (rc == -EINVAL)
1859                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1860         else if (rc == -ENOENT)
1861                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1862         else if (rc == -EACCES)
1863                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1864         else if (rc == -EFAULT)
1865                 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1866         else if (rc == -ENOMEM)
1867                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1868         else if (rc == -EOPNOTSUPP)
1869                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1870         else if (rc)
1871                 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1872
1873         if (conn->use_spnego && conn->mechToken) {
1874                 kfree(conn->mechToken);
1875                 conn->mechToken = NULL;
1876         }
1877
1878         if (rc < 0) {
1879                 /*
1880                  * SecurityBufferOffset should be set to zero
1881                  * in session setup error response.
1882                  */
1883                 rsp->SecurityBufferOffset = 0;
1884
1885                 if (sess) {
1886                         bool try_delay = false;
1887
1888                         /*
1889                          * To avoid dictionary attacks (repeated session setups rapidly sent) to
1890                          * connect to server, ksmbd make a delay of a 5 seconds on session setup
1891                          * failure to make it harder to send enough random connection requests
1892                          * to break into a server.
1893                          */
1894                         if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1895                                 try_delay = true;
1896
1897                         sess->last_active = jiffies;
1898                         sess->state = SMB2_SESSION_EXPIRED;
1899                         if (try_delay) {
1900                                 ksmbd_conn_set_need_reconnect(conn);
1901                                 ssleep(5);
1902                                 ksmbd_conn_set_need_negotiate(conn);
1903                         }
1904                 }
1905                 smb2_set_err_rsp(work);
1906         } else {
1907                 unsigned int iov_len;
1908
1909                 if (rsp->SecurityBufferLength)
1910                         iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1911                                 le16_to_cpu(rsp->SecurityBufferLength);
1912                 else
1913                         iov_len = sizeof(struct smb2_sess_setup_rsp);
1914                 rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1915                 if (rc)
1916                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1917         }
1918
1919         ksmbd_conn_unlock(conn);
1920         return rc;
1921 }
1922
1923 /**
1924  * smb2_tree_connect() - handler for smb2 tree connect command
1925  * @work:       smb work containing smb request buffer
1926  *
1927  * Return:      0 on success, otherwise error
1928  */
1929 int smb2_tree_connect(struct ksmbd_work *work)
1930 {
1931         struct ksmbd_conn *conn = work->conn;
1932         struct smb2_tree_connect_req *req;
1933         struct smb2_tree_connect_rsp *rsp;
1934         struct ksmbd_session *sess = work->sess;
1935         char *treename = NULL, *name = NULL;
1936         struct ksmbd_tree_conn_status status;
1937         struct ksmbd_share_config *share;
1938         int rc = -EINVAL;
1939
1940         WORK_BUFFERS(work, req, rsp);
1941
1942         treename = smb_strndup_from_utf16(req->Buffer,
1943                                           le16_to_cpu(req->PathLength), true,
1944                                           conn->local_nls);
1945         if (IS_ERR(treename)) {
1946                 pr_err("treename is NULL\n");
1947                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1948                 goto out_err1;
1949         }
1950
1951         name = ksmbd_extract_sharename(conn->um, treename);
1952         if (IS_ERR(name)) {
1953                 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1954                 goto out_err1;
1955         }
1956
1957         ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1958                     name, treename);
1959
1960         status = ksmbd_tree_conn_connect(conn, sess, name);
1961         if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1962                 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1963         else
1964                 goto out_err1;
1965
1966         share = status.tree_conn->share_conf;
1967         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1968                 ksmbd_debug(SMB, "IPC share path request\n");
1969                 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1970                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1971                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1972                         FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1973                         FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1974                         FILE_SYNCHRONIZE_LE;
1975         } else {
1976                 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1977                 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1978                         FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1979                 if (test_tree_conn_flag(status.tree_conn,
1980                                         KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1981                         rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1982                                 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1983                                 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1984                                 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1985                                 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1986                                 FILE_SYNCHRONIZE_LE;
1987                 }
1988         }
1989
1990         status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1991         if (conn->posix_ext_supported)
1992                 status.tree_conn->posix_extensions = true;
1993
1994         write_lock(&sess->tree_conns_lock);
1995         status.tree_conn->t_state = TREE_CONNECTED;
1996         write_unlock(&sess->tree_conns_lock);
1997         rsp->StructureSize = cpu_to_le16(16);
1998 out_err1:
1999         rsp->Capabilities = 0;
2000         rsp->Reserved = 0;
2001         /* default manual caching */
2002         rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2003
2004         rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2005         if (rc)
2006                 status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2007
2008         if (!IS_ERR(treename))
2009                 kfree(treename);
2010         if (!IS_ERR(name))
2011                 kfree(name);
2012
2013         switch (status.ret) {
2014         case KSMBD_TREE_CONN_STATUS_OK:
2015                 rsp->hdr.Status = STATUS_SUCCESS;
2016                 rc = 0;
2017                 break;
2018         case -ESTALE:
2019         case -ENOENT:
2020         case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2021                 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2022                 break;
2023         case -ENOMEM:
2024         case KSMBD_TREE_CONN_STATUS_NOMEM:
2025                 rsp->hdr.Status = STATUS_NO_MEMORY;
2026                 break;
2027         case KSMBD_TREE_CONN_STATUS_ERROR:
2028         case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2029         case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2030                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2031                 break;
2032         case -EINVAL:
2033                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2034                 break;
2035         default:
2036                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2037         }
2038
2039         if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2040                 smb2_set_err_rsp(work);
2041
2042         return rc;
2043 }
2044
2045 /**
2046  * smb2_create_open_flags() - convert smb open flags to unix open flags
2047  * @file_present:       is file already present
2048  * @access:             file access flags
2049  * @disposition:        file disposition flags
2050  * @may_flags:          set with MAY_ flags
2051  *
2052  * Return:      file open flags
2053  */
2054 static int smb2_create_open_flags(bool file_present, __le32 access,
2055                                   __le32 disposition,
2056                                   int *may_flags)
2057 {
2058         int oflags = O_NONBLOCK | O_LARGEFILE;
2059
2060         if (access & FILE_READ_DESIRED_ACCESS_LE &&
2061             access & FILE_WRITE_DESIRE_ACCESS_LE) {
2062                 oflags |= O_RDWR;
2063                 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2064         } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2065                 oflags |= O_WRONLY;
2066                 *may_flags = MAY_OPEN | MAY_WRITE;
2067         } else {
2068                 oflags |= O_RDONLY;
2069                 *may_flags = MAY_OPEN | MAY_READ;
2070         }
2071
2072         if (access == FILE_READ_ATTRIBUTES_LE)
2073                 oflags |= O_PATH;
2074
2075         if (file_present) {
2076                 switch (disposition & FILE_CREATE_MASK_LE) {
2077                 case FILE_OPEN_LE:
2078                 case FILE_CREATE_LE:
2079                         break;
2080                 case FILE_SUPERSEDE_LE:
2081                 case FILE_OVERWRITE_LE:
2082                 case FILE_OVERWRITE_IF_LE:
2083                         oflags |= O_TRUNC;
2084                         break;
2085                 default:
2086                         break;
2087                 }
2088         } else {
2089                 switch (disposition & FILE_CREATE_MASK_LE) {
2090                 case FILE_SUPERSEDE_LE:
2091                 case FILE_CREATE_LE:
2092                 case FILE_OPEN_IF_LE:
2093                 case FILE_OVERWRITE_IF_LE:
2094                         oflags |= O_CREAT;
2095                         break;
2096                 case FILE_OPEN_LE:
2097                 case FILE_OVERWRITE_LE:
2098                         oflags &= ~O_CREAT;
2099                         break;
2100                 default:
2101                         break;
2102                 }
2103         }
2104
2105         return oflags;
2106 }
2107
2108 /**
2109  * smb2_tree_disconnect() - handler for smb tree connect request
2110  * @work:       smb work containing request buffer
2111  *
2112  * Return:      0
2113  */
2114 int smb2_tree_disconnect(struct ksmbd_work *work)
2115 {
2116         struct smb2_tree_disconnect_rsp *rsp;
2117         struct smb2_tree_disconnect_req *req;
2118         struct ksmbd_session *sess = work->sess;
2119         struct ksmbd_tree_connect *tcon = work->tcon;
2120         int err;
2121
2122         WORK_BUFFERS(work, req, rsp);
2123
2124         ksmbd_debug(SMB, "request\n");
2125
2126         if (!tcon) {
2127                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2128
2129                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2130                 err = -ENOENT;
2131                 goto err_out;
2132         }
2133
2134         ksmbd_close_tree_conn_fds(work);
2135
2136         write_lock(&sess->tree_conns_lock);
2137         if (tcon->t_state == TREE_DISCONNECTED) {
2138                 write_unlock(&sess->tree_conns_lock);
2139                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2140                 err = -ENOENT;
2141                 goto err_out;
2142         }
2143
2144         WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2145         tcon->t_state = TREE_DISCONNECTED;
2146         write_unlock(&sess->tree_conns_lock);
2147
2148         err = ksmbd_tree_conn_disconnect(sess, tcon);
2149         if (err) {
2150                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2151                 goto err_out;
2152         }
2153
2154         work->tcon = NULL;
2155
2156         rsp->StructureSize = cpu_to_le16(4);
2157         err = ksmbd_iov_pin_rsp(work, rsp,
2158                                 sizeof(struct smb2_tree_disconnect_rsp));
2159         if (err) {
2160                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2161                 goto err_out;
2162         }
2163
2164         return 0;
2165
2166 err_out:
2167         smb2_set_err_rsp(work);
2168         return err;
2169
2170 }
2171
2172 /**
2173  * smb2_session_logoff() - handler for session log off request
2174  * @work:       smb work containing request buffer
2175  *
2176  * Return:      0
2177  */
2178 int smb2_session_logoff(struct ksmbd_work *work)
2179 {
2180         struct ksmbd_conn *conn = work->conn;
2181         struct smb2_logoff_req *req;
2182         struct smb2_logoff_rsp *rsp;
2183         struct ksmbd_session *sess;
2184         u64 sess_id;
2185         int err;
2186
2187         WORK_BUFFERS(work, req, rsp);
2188
2189         ksmbd_debug(SMB, "request\n");
2190
2191         ksmbd_conn_lock(conn);
2192         if (!ksmbd_conn_good(conn)) {
2193                 ksmbd_conn_unlock(conn);
2194                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2195                 smb2_set_err_rsp(work);
2196                 return -ENOENT;
2197         }
2198         sess_id = le64_to_cpu(req->hdr.SessionId);
2199         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2200         ksmbd_conn_unlock(conn);
2201
2202         ksmbd_close_session_fds(work);
2203         ksmbd_conn_wait_idle(conn, sess_id);
2204
2205         /*
2206          * Re-lookup session to validate if session is deleted
2207          * while waiting request complete
2208          */
2209         sess = ksmbd_session_lookup_all(conn, sess_id);
2210         if (ksmbd_tree_conn_session_logoff(sess)) {
2211                 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2212                 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2213                 smb2_set_err_rsp(work);
2214                 return -ENOENT;
2215         }
2216
2217         ksmbd_destroy_file_table(&sess->file_table);
2218         sess->state = SMB2_SESSION_EXPIRED;
2219
2220         ksmbd_free_user(sess->user);
2221         sess->user = NULL;
2222         ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2223
2224         rsp->StructureSize = cpu_to_le16(4);
2225         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2226         if (err) {
2227                 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2228                 smb2_set_err_rsp(work);
2229                 return err;
2230         }
2231         return 0;
2232 }
2233
2234 /**
2235  * create_smb2_pipe() - create IPC pipe
2236  * @work:       smb work containing request buffer
2237  *
2238  * Return:      0 on success, otherwise error
2239  */
2240 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2241 {
2242         struct smb2_create_rsp *rsp;
2243         struct smb2_create_req *req;
2244         int id;
2245         int err;
2246         char *name;
2247
2248         WORK_BUFFERS(work, req, rsp);
2249
2250         name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2251                                       1, work->conn->local_nls);
2252         if (IS_ERR(name)) {
2253                 rsp->hdr.Status = STATUS_NO_MEMORY;
2254                 err = PTR_ERR(name);
2255                 goto out;
2256         }
2257
2258         id = ksmbd_session_rpc_open(work->sess, name);
2259         if (id < 0) {
2260                 pr_err("Unable to open RPC pipe: %d\n", id);
2261                 err = id;
2262                 goto out;
2263         }
2264
2265         rsp->hdr.Status = STATUS_SUCCESS;
2266         rsp->StructureSize = cpu_to_le16(89);
2267         rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2268         rsp->Flags = 0;
2269         rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2270
2271         rsp->CreationTime = cpu_to_le64(0);
2272         rsp->LastAccessTime = cpu_to_le64(0);
2273         rsp->ChangeTime = cpu_to_le64(0);
2274         rsp->AllocationSize = cpu_to_le64(0);
2275         rsp->EndofFile = cpu_to_le64(0);
2276         rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2277         rsp->Reserved2 = 0;
2278         rsp->VolatileFileId = id;
2279         rsp->PersistentFileId = 0;
2280         rsp->CreateContextsOffset = 0;
2281         rsp->CreateContextsLength = 0;
2282
2283         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2284         if (err)
2285                 goto out;
2286
2287         kfree(name);
2288         return 0;
2289
2290 out:
2291         switch (err) {
2292         case -EINVAL:
2293                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2294                 break;
2295         case -ENOSPC:
2296         case -ENOMEM:
2297                 rsp->hdr.Status = STATUS_NO_MEMORY;
2298                 break;
2299         }
2300
2301         if (!IS_ERR(name))
2302                 kfree(name);
2303
2304         smb2_set_err_rsp(work);
2305         return err;
2306 }
2307
2308 /**
2309  * smb2_set_ea() - handler for setting extended attributes using set
2310  *              info command
2311  * @eabuf:      set info command buffer
2312  * @buf_len:    set info command buffer length
2313  * @path:       dentry path for get ea
2314  *
2315  * Return:      0 on success, otherwise error
2316  */
2317 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2318                        const struct path *path)
2319 {
2320         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2321         char *attr_name = NULL, *value;
2322         int rc = 0;
2323         unsigned int next = 0;
2324
2325         if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2326                         le16_to_cpu(eabuf->EaValueLength))
2327                 return -EINVAL;
2328
2329         attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2330         if (!attr_name)
2331                 return -ENOMEM;
2332
2333         do {
2334                 if (!eabuf->EaNameLength)
2335                         goto next;
2336
2337                 ksmbd_debug(SMB,
2338                             "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2339                             eabuf->name, eabuf->EaNameLength,
2340                             le16_to_cpu(eabuf->EaValueLength),
2341                             le32_to_cpu(eabuf->NextEntryOffset));
2342
2343                 if (eabuf->EaNameLength >
2344                     (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2345                         rc = -EINVAL;
2346                         break;
2347                 }
2348
2349                 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2350                 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2351                        eabuf->EaNameLength);
2352                 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2353                 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2354
2355                 if (!eabuf->EaValueLength) {
2356                         rc = ksmbd_vfs_casexattr_len(idmap,
2357                                                      path->dentry,
2358                                                      attr_name,
2359                                                      XATTR_USER_PREFIX_LEN +
2360                                                      eabuf->EaNameLength);
2361
2362                         /* delete the EA only when it exits */
2363                         if (rc > 0) {
2364                                 rc = ksmbd_vfs_remove_xattr(idmap,
2365                                                             path,
2366                                                             attr_name);
2367
2368                                 if (rc < 0) {
2369                                         ksmbd_debug(SMB,
2370                                                     "remove xattr failed(%d)\n",
2371                                                     rc);
2372                                         break;
2373                                 }
2374                         }
2375
2376                         /* if the EA doesn't exist, just do nothing. */
2377                         rc = 0;
2378                 } else {
2379                         rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2380                                                 le16_to_cpu(eabuf->EaValueLength),
2381                                                 0, true);
2382                         if (rc < 0) {
2383                                 ksmbd_debug(SMB,
2384                                             "ksmbd_vfs_setxattr is failed(%d)\n",
2385                                             rc);
2386                                 break;
2387                         }
2388                 }
2389
2390 next:
2391                 next = le32_to_cpu(eabuf->NextEntryOffset);
2392                 if (next == 0 || buf_len < next)
2393                         break;
2394                 buf_len -= next;
2395                 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2396                 if (buf_len < sizeof(struct smb2_ea_info)) {
2397                         rc = -EINVAL;
2398                         break;
2399                 }
2400
2401                 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2402                                 le16_to_cpu(eabuf->EaValueLength)) {
2403                         rc = -EINVAL;
2404                         break;
2405                 }
2406         } while (next != 0);
2407
2408         kfree(attr_name);
2409         return rc;
2410 }
2411
2412 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2413                                                struct ksmbd_file *fp,
2414                                                char *stream_name, int s_type)
2415 {
2416         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2417         size_t xattr_stream_size;
2418         char *xattr_stream_name;
2419         int rc;
2420
2421         rc = ksmbd_vfs_xattr_stream_name(stream_name,
2422                                          &xattr_stream_name,
2423                                          &xattr_stream_size,
2424                                          s_type);
2425         if (rc)
2426                 return rc;
2427
2428         fp->stream.name = xattr_stream_name;
2429         fp->stream.size = xattr_stream_size;
2430
2431         /* Check if there is stream prefix in xattr space */
2432         rc = ksmbd_vfs_casexattr_len(idmap,
2433                                      path->dentry,
2434                                      xattr_stream_name,
2435                                      xattr_stream_size);
2436         if (rc >= 0)
2437                 return 0;
2438
2439         if (fp->cdoption == FILE_OPEN_LE) {
2440                 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2441                 return -EBADF;
2442         }
2443
2444         rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2445         if (rc < 0)
2446                 pr_err("Failed to store XATTR stream name :%d\n", rc);
2447         return 0;
2448 }
2449
2450 static int smb2_remove_smb_xattrs(const struct path *path)
2451 {
2452         struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2453         char *name, *xattr_list = NULL;
2454         ssize_t xattr_list_len;
2455         int err = 0;
2456
2457         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2458         if (xattr_list_len < 0) {
2459                 goto out;
2460         } else if (!xattr_list_len) {
2461                 ksmbd_debug(SMB, "empty xattr in the file\n");
2462                 goto out;
2463         }
2464
2465         for (name = xattr_list; name - xattr_list < xattr_list_len;
2466                         name += strlen(name) + 1) {
2467                 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2468
2469                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2470                     !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2471                              STREAM_PREFIX_LEN)) {
2472                         err = ksmbd_vfs_remove_xattr(idmap, path,
2473                                                      name);
2474                         if (err)
2475                                 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2476                                             name);
2477                 }
2478         }
2479 out:
2480         kvfree(xattr_list);
2481         return err;
2482 }
2483
2484 static int smb2_create_truncate(const struct path *path)
2485 {
2486         int rc = vfs_truncate(path, 0);
2487
2488         if (rc) {
2489                 pr_err("vfs_truncate failed, rc %d\n", rc);
2490                 return rc;
2491         }
2492
2493         rc = smb2_remove_smb_xattrs(path);
2494         if (rc == -EOPNOTSUPP)
2495                 rc = 0;
2496         if (rc)
2497                 ksmbd_debug(SMB,
2498                             "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2499                             rc);
2500         return rc;
2501 }
2502
2503 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2504                             struct ksmbd_file *fp)
2505 {
2506         struct xattr_dos_attrib da = {0};
2507         int rc;
2508
2509         if (!test_share_config_flag(tcon->share_conf,
2510                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2511                 return;
2512
2513         da.version = 4;
2514         da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2515         da.itime = da.create_time = fp->create_time;
2516         da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2517                 XATTR_DOSINFO_ITIME;
2518
2519         rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, false);
2520         if (rc)
2521                 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2522 }
2523
2524 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2525                                const struct path *path, struct ksmbd_file *fp)
2526 {
2527         struct xattr_dos_attrib da;
2528         int rc;
2529
2530         fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2531
2532         /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2533         if (!test_share_config_flag(tcon->share_conf,
2534                                     KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2535                 return;
2536
2537         rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2538                                             path->dentry, &da);
2539         if (rc > 0) {
2540                 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2541                 fp->create_time = da.create_time;
2542                 fp->itime = da.itime;
2543         }
2544 }
2545
2546 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2547                       struct path *path, char *name, int open_flags,
2548                       umode_t posix_mode, bool is_dir)
2549 {
2550         struct ksmbd_tree_connect *tcon = work->tcon;
2551         struct ksmbd_share_config *share = tcon->share_conf;
2552         umode_t mode;
2553         int rc;
2554
2555         if (!(open_flags & O_CREAT))
2556                 return -EBADF;
2557
2558         ksmbd_debug(SMB, "file does not exist, so creating\n");
2559         if (is_dir == true) {
2560                 ksmbd_debug(SMB, "creating directory\n");
2561
2562                 mode = share_config_directory_mode(share, posix_mode);
2563                 rc = ksmbd_vfs_mkdir(work, name, mode);
2564                 if (rc)
2565                         return rc;
2566         } else {
2567                 ksmbd_debug(SMB, "creating regular file\n");
2568
2569                 mode = share_config_create_mode(share, posix_mode);
2570                 rc = ksmbd_vfs_create(work, name, mode);
2571                 if (rc)
2572                         return rc;
2573         }
2574
2575         rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2576         if (rc) {
2577                 pr_err("cannot get linux path (%s), err = %d\n",
2578                        name, rc);
2579                 return rc;
2580         }
2581         return 0;
2582 }
2583
2584 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2585                                  struct smb2_create_req *req,
2586                                  const struct path *path)
2587 {
2588         struct create_context *context;
2589         struct create_sd_buf_req *sd_buf;
2590
2591         if (!req->CreateContextsOffset)
2592                 return -ENOENT;
2593
2594         /* Parse SD BUFFER create contexts */
2595         context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2596         if (!context)
2597                 return -ENOENT;
2598         else if (IS_ERR(context))
2599                 return PTR_ERR(context);
2600
2601         ksmbd_debug(SMB,
2602                     "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2603         sd_buf = (struct create_sd_buf_req *)context;
2604         if (le16_to_cpu(context->DataOffset) +
2605             le32_to_cpu(context->DataLength) <
2606             sizeof(struct create_sd_buf_req))
2607                 return -EINVAL;
2608         return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2609                             le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2610 }
2611
2612 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2613                              struct mnt_idmap *idmap,
2614                              struct inode *inode)
2615 {
2616         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2617         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2618
2619         fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2620         fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2621         fattr->cf_mode = inode->i_mode;
2622         fattr->cf_acls = NULL;
2623         fattr->cf_dacls = NULL;
2624
2625         if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2626                 fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2627                 if (S_ISDIR(inode->i_mode))
2628                         fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2629         }
2630 }
2631
2632 /**
2633  * smb2_open() - handler for smb file open request
2634  * @work:       smb work containing request buffer
2635  *
2636  * Return:      0 on success, otherwise error
2637  */
2638 int smb2_open(struct ksmbd_work *work)
2639 {
2640         struct ksmbd_conn *conn = work->conn;
2641         struct ksmbd_session *sess = work->sess;
2642         struct ksmbd_tree_connect *tcon = work->tcon;
2643         struct smb2_create_req *req;
2644         struct smb2_create_rsp *rsp;
2645         struct path path, parent_path;
2646         struct ksmbd_share_config *share = tcon->share_conf;
2647         struct ksmbd_file *fp = NULL;
2648         struct file *filp = NULL;
2649         struct mnt_idmap *idmap = NULL;
2650         struct kstat stat;
2651         struct create_context *context;
2652         struct lease_ctx_info *lc = NULL;
2653         struct create_ea_buf_req *ea_buf = NULL;
2654         struct oplock_info *opinfo;
2655         __le32 *next_ptr = NULL;
2656         int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2657         int rc = 0;
2658         int contxt_cnt = 0, query_disk_id = 0;
2659         int maximal_access_ctxt = 0, posix_ctxt = 0;
2660         int s_type = 0;
2661         int next_off = 0;
2662         char *name = NULL;
2663         char *stream_name = NULL;
2664         bool file_present = false, created = false, already_permitted = false;
2665         int share_ret, need_truncate = 0;
2666         u64 time;
2667         umode_t posix_mode = 0;
2668         __le32 daccess, maximal_access = 0;
2669         int iov_len = 0;
2670
2671         WORK_BUFFERS(work, req, rsp);
2672
2673         if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2674             (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2675                 ksmbd_debug(SMB, "invalid flag in chained command\n");
2676                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2677                 smb2_set_err_rsp(work);
2678                 return -EINVAL;
2679         }
2680
2681         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2682                 ksmbd_debug(SMB, "IPC pipe create request\n");
2683                 return create_smb2_pipe(work);
2684         }
2685
2686         if (req->NameLength) {
2687                 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2688                     *(char *)req->Buffer == '\\') {
2689                         pr_err("not allow directory name included leading slash\n");
2690                         rc = -EINVAL;
2691                         goto err_out2;
2692                 }
2693
2694                 name = smb2_get_name(req->Buffer,
2695                                      le16_to_cpu(req->NameLength),
2696                                      work->conn->local_nls);
2697                 if (IS_ERR(name)) {
2698                         rc = PTR_ERR(name);
2699                         if (rc != -ENOMEM)
2700                                 rc = -ENOENT;
2701                         name = NULL;
2702                         goto err_out2;
2703                 }
2704
2705                 ksmbd_debug(SMB, "converted name = %s\n", name);
2706                 if (strchr(name, ':')) {
2707                         if (!test_share_config_flag(work->tcon->share_conf,
2708                                                     KSMBD_SHARE_FLAG_STREAMS)) {
2709                                 rc = -EBADF;
2710                                 goto err_out2;
2711                         }
2712                         rc = parse_stream_name(name, &stream_name, &s_type);
2713                         if (rc < 0)
2714                                 goto err_out2;
2715                 }
2716
2717                 rc = ksmbd_validate_filename(name);
2718                 if (rc < 0)
2719                         goto err_out2;
2720
2721                 if (ksmbd_share_veto_filename(share, name)) {
2722                         rc = -ENOENT;
2723                         ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2724                                     name);
2725                         goto err_out2;
2726                 }
2727         } else {
2728                 name = kstrdup("", GFP_KERNEL);
2729                 if (!name) {
2730                         rc = -ENOMEM;
2731                         goto err_out2;
2732                 }
2733         }
2734
2735         if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2736                 pr_err("Invalid impersonationlevel : 0x%x\n",
2737                        le32_to_cpu(req->ImpersonationLevel));
2738                 rc = -EIO;
2739                 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2740                 goto err_out2;
2741         }
2742
2743         if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2744                 pr_err("Invalid create options : 0x%x\n",
2745                        le32_to_cpu(req->CreateOptions));
2746                 rc = -EINVAL;
2747                 goto err_out2;
2748         } else {
2749                 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2750                     req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2751                         req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2752
2753                 if (req->CreateOptions &
2754                     (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2755                      FILE_RESERVE_OPFILTER_LE)) {
2756                         rc = -EOPNOTSUPP;
2757                         goto err_out2;
2758                 }
2759
2760                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2761                         if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2762                                 rc = -EINVAL;
2763                                 goto err_out2;
2764                         } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2765                                 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2766                         }
2767                 }
2768         }
2769
2770         if (le32_to_cpu(req->CreateDisposition) >
2771             le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2772                 pr_err("Invalid create disposition : 0x%x\n",
2773                        le32_to_cpu(req->CreateDisposition));
2774                 rc = -EINVAL;
2775                 goto err_out2;
2776         }
2777
2778         if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2779                 pr_err("Invalid desired access : 0x%x\n",
2780                        le32_to_cpu(req->DesiredAccess));
2781                 rc = -EACCES;
2782                 goto err_out2;
2783         }
2784
2785         if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2786                 pr_err("Invalid file attribute : 0x%x\n",
2787                        le32_to_cpu(req->FileAttributes));
2788                 rc = -EINVAL;
2789                 goto err_out2;
2790         }
2791
2792         if (req->CreateContextsOffset) {
2793                 /* Parse non-durable handle create contexts */
2794                 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
2795                 if (IS_ERR(context)) {
2796                         rc = PTR_ERR(context);
2797                         goto err_out2;
2798                 } else if (context) {
2799                         ea_buf = (struct create_ea_buf_req *)context;
2800                         if (le16_to_cpu(context->DataOffset) +
2801                             le32_to_cpu(context->DataLength) <
2802                             sizeof(struct create_ea_buf_req)) {
2803                                 rc = -EINVAL;
2804                                 goto err_out2;
2805                         }
2806                         if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2807                                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2808                                 rc = -EACCES;
2809                                 goto err_out2;
2810                         }
2811                 }
2812
2813                 context = smb2_find_context_vals(req,
2814                                                  SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
2815                 if (IS_ERR(context)) {
2816                         rc = PTR_ERR(context);
2817                         goto err_out2;
2818                 } else if (context) {
2819                         ksmbd_debug(SMB,
2820                                     "get query maximal access context\n");
2821                         maximal_access_ctxt = 1;
2822                 }
2823
2824                 context = smb2_find_context_vals(req,
2825                                                  SMB2_CREATE_TIMEWARP_REQUEST, 4);
2826                 if (IS_ERR(context)) {
2827                         rc = PTR_ERR(context);
2828                         goto err_out2;
2829                 } else if (context) {
2830                         ksmbd_debug(SMB, "get timewarp context\n");
2831                         rc = -EBADF;
2832                         goto err_out2;
2833                 }
2834
2835                 if (tcon->posix_extensions) {
2836                         context = smb2_find_context_vals(req,
2837                                                          SMB2_CREATE_TAG_POSIX, 16);
2838                         if (IS_ERR(context)) {
2839                                 rc = PTR_ERR(context);
2840                                 goto err_out2;
2841                         } else if (context) {
2842                                 struct create_posix *posix =
2843                                         (struct create_posix *)context;
2844                                 if (le16_to_cpu(context->DataOffset) +
2845                                     le32_to_cpu(context->DataLength) <
2846                                     sizeof(struct create_posix) - 4) {
2847                                         rc = -EINVAL;
2848                                         goto err_out2;
2849                                 }
2850                                 ksmbd_debug(SMB, "get posix context\n");
2851
2852                                 posix_mode = le32_to_cpu(posix->Mode);
2853                                 posix_ctxt = 1;
2854                         }
2855                 }
2856         }
2857
2858         if (ksmbd_override_fsids(work)) {
2859                 rc = -ENOMEM;
2860                 goto err_out2;
2861         }
2862
2863         rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
2864                                         &parent_path, &path, 1);
2865         if (!rc) {
2866                 file_present = true;
2867
2868                 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2869                         /*
2870                          * If file exists with under flags, return access
2871                          * denied error.
2872                          */
2873                         if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2874                             req->CreateDisposition == FILE_OPEN_IF_LE) {
2875                                 rc = -EACCES;
2876                                 goto err_out;
2877                         }
2878
2879                         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2880                                 ksmbd_debug(SMB,
2881                                             "User does not have write permission\n");
2882                                 rc = -EACCES;
2883                                 goto err_out;
2884                         }
2885                 } else if (d_is_symlink(path.dentry)) {
2886                         rc = -EACCES;
2887                         goto err_out;
2888                 }
2889
2890                 file_present = true;
2891                 idmap = mnt_idmap(path.mnt);
2892         } else {
2893                 if (rc != -ENOENT)
2894                         goto err_out;
2895                 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2896                             name, rc);
2897                 rc = 0;
2898         }
2899
2900         if (stream_name) {
2901                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2902                         if (s_type == DATA_STREAM) {
2903                                 rc = -EIO;
2904                                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2905                         }
2906                 } else {
2907                         if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
2908                             s_type == DATA_STREAM) {
2909                                 rc = -EIO;
2910                                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2911                         }
2912                 }
2913
2914                 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2915                     req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2916                         rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2917                         rc = -EIO;
2918                 }
2919
2920                 if (rc < 0)
2921                         goto err_out;
2922         }
2923
2924         if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2925             S_ISDIR(d_inode(path.dentry)->i_mode) &&
2926             !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2927                 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2928                             name, req->CreateOptions);
2929                 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2930                 rc = -EIO;
2931                 goto err_out;
2932         }
2933
2934         if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2935             !(req->CreateDisposition == FILE_CREATE_LE) &&
2936             !S_ISDIR(d_inode(path.dentry)->i_mode)) {
2937                 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2938                 rc = -EIO;
2939                 goto err_out;
2940         }
2941
2942         if (!stream_name && file_present &&
2943             req->CreateDisposition == FILE_CREATE_LE) {
2944                 rc = -EEXIST;
2945                 goto err_out;
2946         }
2947
2948         daccess = smb_map_generic_desired_access(req->DesiredAccess);
2949
2950         if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2951                 rc = smb_check_perm_dacl(conn, &path, &daccess,
2952                                          sess->user->uid);
2953                 if (rc)
2954                         goto err_out;
2955         }
2956
2957         if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2958                 if (!file_present) {
2959                         daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2960                 } else {
2961                         ksmbd_vfs_query_maximal_access(idmap,
2962                                                             path.dentry,
2963                                                             &daccess);
2964                         already_permitted = true;
2965                 }
2966                 maximal_access = daccess;
2967         }
2968
2969         open_flags = smb2_create_open_flags(file_present, daccess,
2970                                             req->CreateDisposition,
2971                                             &may_flags);
2972
2973         if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2974                 if (open_flags & O_CREAT) {
2975                         ksmbd_debug(SMB,
2976                                     "User does not have write permission\n");
2977                         rc = -EACCES;
2978                         goto err_out;
2979                 }
2980         }
2981
2982         /*create file if not present */
2983         if (!file_present) {
2984                 rc = smb2_creat(work, &parent_path, &path, name, open_flags,
2985                                 posix_mode,
2986                                 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2987                 if (rc) {
2988                         if (rc == -ENOENT) {
2989                                 rc = -EIO;
2990                                 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2991                         }
2992                         goto err_out;
2993                 }
2994
2995                 created = true;
2996                 idmap = mnt_idmap(path.mnt);
2997                 if (ea_buf) {
2998                         if (le32_to_cpu(ea_buf->ccontext.DataLength) <
2999                             sizeof(struct smb2_ea_info)) {
3000                                 rc = -EINVAL;
3001                                 goto err_out;
3002                         }
3003
3004                         rc = smb2_set_ea(&ea_buf->ea,
3005                                          le32_to_cpu(ea_buf->ccontext.DataLength),
3006                                          &path);
3007                         if (rc == -EOPNOTSUPP)
3008                                 rc = 0;
3009                         else if (rc)
3010                                 goto err_out;
3011                 }
3012         } else if (!already_permitted) {
3013                 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3014                  * because execute(search) permission on a parent directory,
3015                  * is already granted.
3016                  */
3017                 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3018                         rc = inode_permission(idmap,
3019                                               d_inode(path.dentry),
3020                                               may_flags);
3021                         if (rc)
3022                                 goto err_out;
3023
3024                         if ((daccess & FILE_DELETE_LE) ||
3025                             (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3026                                 rc = inode_permission(idmap,
3027                                                       d_inode(path.dentry->d_parent),
3028                                                       MAY_EXEC | MAY_WRITE);
3029                                 if (rc)
3030                                         goto err_out;
3031                         }
3032                 }
3033         }
3034
3035         rc = ksmbd_query_inode_status(path.dentry->d_parent);
3036         if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3037                 rc = -EBUSY;
3038                 goto err_out;
3039         }
3040
3041         rc = 0;
3042         filp = dentry_open(&path, open_flags, current_cred());
3043         if (IS_ERR(filp)) {
3044                 rc = PTR_ERR(filp);
3045                 pr_err("dentry open for dir failed, rc %d\n", rc);
3046                 goto err_out;
3047         }
3048
3049         if (file_present) {
3050                 if (!(open_flags & O_TRUNC))
3051                         file_info = FILE_OPENED;
3052                 else
3053                         file_info = FILE_OVERWRITTEN;
3054
3055                 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3056                     FILE_SUPERSEDE_LE)
3057                         file_info = FILE_SUPERSEDED;
3058         } else if (open_flags & O_CREAT) {
3059                 file_info = FILE_CREATED;
3060         }
3061
3062         ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3063
3064         /* Obtain Volatile-ID */
3065         fp = ksmbd_open_fd(work, filp);
3066         if (IS_ERR(fp)) {
3067                 fput(filp);
3068                 rc = PTR_ERR(fp);
3069                 fp = NULL;
3070                 goto err_out;
3071         }
3072
3073         /* Get Persistent-ID */
3074         ksmbd_open_durable_fd(fp);
3075         if (!has_file_id(fp->persistent_id)) {
3076                 rc = -ENOMEM;
3077                 goto err_out;
3078         }
3079
3080         fp->cdoption = req->CreateDisposition;
3081         fp->daccess = daccess;
3082         fp->saccess = req->ShareAccess;
3083         fp->coption = req->CreateOptions;
3084
3085         /* Set default windows and posix acls if creating new file */
3086         if (created) {
3087                 int posix_acl_rc;
3088                 struct inode *inode = d_inode(path.dentry);
3089
3090                 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3091                                                            &path,
3092                                                            d_inode(path.dentry->d_parent));
3093                 if (posix_acl_rc)
3094                         ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3095
3096                 if (test_share_config_flag(work->tcon->share_conf,
3097                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3098                         rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3099                                               sess->user->gid);
3100                 }
3101
3102                 if (rc) {
3103                         rc = smb2_create_sd_buffer(work, req, &path);
3104                         if (rc) {
3105                                 if (posix_acl_rc)
3106                                         ksmbd_vfs_set_init_posix_acl(idmap,
3107                                                                      &path);
3108
3109                                 if (test_share_config_flag(work->tcon->share_conf,
3110                                                            KSMBD_SHARE_FLAG_ACL_XATTR)) {
3111                                         struct smb_fattr fattr;
3112                                         struct smb_ntsd *pntsd;
3113                                         int pntsd_size, ace_num = 0;
3114
3115                                         ksmbd_acls_fattr(&fattr, idmap, inode);
3116                                         if (fattr.cf_acls)
3117                                                 ace_num = fattr.cf_acls->a_count;
3118                                         if (fattr.cf_dacls)
3119                                                 ace_num += fattr.cf_dacls->a_count;
3120
3121                                         pntsd = kmalloc(sizeof(struct smb_ntsd) +
3122                                                         sizeof(struct smb_sid) * 3 +
3123                                                         sizeof(struct smb_acl) +
3124                                                         sizeof(struct smb_ace) * ace_num * 2,
3125                                                         GFP_KERNEL);
3126                                         if (!pntsd) {
3127                                                 posix_acl_release(fattr.cf_acls);
3128                                                 posix_acl_release(fattr.cf_dacls);
3129                                                 goto err_out;
3130                                         }
3131
3132                                         rc = build_sec_desc(idmap,
3133                                                             pntsd, NULL, 0,
3134                                                             OWNER_SECINFO |
3135                                                             GROUP_SECINFO |
3136                                                             DACL_SECINFO,
3137                                                             &pntsd_size, &fattr);
3138                                         posix_acl_release(fattr.cf_acls);
3139                                         posix_acl_release(fattr.cf_dacls);
3140                                         if (rc) {
3141                                                 kfree(pntsd);
3142                                                 goto err_out;
3143                                         }
3144
3145                                         rc = ksmbd_vfs_set_sd_xattr(conn,
3146                                                                     idmap,
3147                                                                     &path,
3148                                                                     pntsd,
3149                                                                     pntsd_size,
3150                                                                     false);
3151                                         kfree(pntsd);
3152                                         if (rc)
3153                                                 pr_err("failed to store ntacl in xattr : %d\n",
3154                                                        rc);
3155                                 }
3156                         }
3157                 }
3158                 rc = 0;
3159         }
3160
3161         if (stream_name) {
3162                 rc = smb2_set_stream_name_xattr(&path,
3163                                                 fp,
3164                                                 stream_name,
3165                                                 s_type);
3166                 if (rc)
3167                         goto err_out;
3168                 file_info = FILE_CREATED;
3169         }
3170
3171         fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3172                         FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3173
3174         /* fp should be searchable through ksmbd_inode.m_fp_list
3175          * after daccess, saccess, attrib_only, and stream are
3176          * initialized.
3177          */
3178         write_lock(&fp->f_ci->m_lock);
3179         list_add(&fp->node, &fp->f_ci->m_fp_list);
3180         write_unlock(&fp->f_ci->m_lock);
3181
3182         /* Check delete pending among previous fp before oplock break */
3183         if (ksmbd_inode_pending_delete(fp)) {
3184                 rc = -EBUSY;
3185                 goto err_out;
3186         }
3187
3188         rc = ksmbd_vfs_getattr(&path, &stat);
3189         if (rc)
3190                 goto err_out;
3191
3192         if (stat.result_mask & STATX_BTIME)
3193                 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3194         else
3195                 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3196         if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3197                 fp->f_ci->m_fattr =
3198                         cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3199
3200         if (!created)
3201                 smb2_update_xattrs(tcon, &path, fp);
3202         else
3203                 smb2_new_xattrs(tcon, &path, fp);
3204
3205         if (file_present || created)
3206                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3207
3208         if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3209             !fp->attrib_only && !stream_name) {
3210                 smb_break_all_oplock(work, fp);
3211                 need_truncate = 1;
3212         }
3213
3214         req_op_level = req->RequestedOplockLevel;
3215         if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
3216                 lc = parse_lease_state(req, S_ISDIR(file_inode(filp)->i_mode));
3217
3218         share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3219         if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3220             (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3221              !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3222                 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3223                         rc = share_ret;
3224                         goto err_out1;
3225                 }
3226         } else {
3227                 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3228                         req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3229                         ksmbd_debug(SMB,
3230                                     "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3231                                     name, req_op_level, lc->req_state);
3232                         rc = find_same_lease_key(sess, fp->f_ci, lc);
3233                         if (rc)
3234                                 goto err_out1;
3235                 } else if (open_flags == O_RDONLY &&
3236                            (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3237                             req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3238                         req_op_level = SMB2_OPLOCK_LEVEL_II;
3239
3240                 rc = smb_grant_oplock(work, req_op_level,
3241                                       fp->persistent_id, fp,
3242                                       le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3243                                       lc, share_ret);
3244                 if (rc < 0)
3245                         goto err_out1;
3246         }
3247
3248         if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3249                 ksmbd_fd_set_delete_on_close(fp, file_info);
3250
3251         if (need_truncate) {
3252                 rc = smb2_create_truncate(&fp->filp->f_path);
3253                 if (rc)
3254                         goto err_out1;
3255         }
3256
3257         if (req->CreateContextsOffset) {
3258                 struct create_alloc_size_req *az_req;
3259
3260                 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3261                                         SMB2_CREATE_ALLOCATION_SIZE, 4);
3262                 if (IS_ERR(az_req)) {
3263                         rc = PTR_ERR(az_req);
3264                         goto err_out1;
3265                 } else if (az_req) {
3266                         loff_t alloc_size;
3267                         int err;
3268
3269                         if (le16_to_cpu(az_req->ccontext.DataOffset) +
3270                             le32_to_cpu(az_req->ccontext.DataLength) <
3271                             sizeof(struct create_alloc_size_req)) {
3272                                 rc = -EINVAL;
3273                                 goto err_out1;
3274                         }
3275                         alloc_size = le64_to_cpu(az_req->AllocationSize);
3276                         ksmbd_debug(SMB,
3277                                     "request smb2 create allocate size : %llu\n",
3278                                     alloc_size);
3279                         smb_break_all_levII_oplock(work, fp, 1);
3280                         err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3281                                             alloc_size);
3282                         if (err < 0)
3283                                 ksmbd_debug(SMB,
3284                                             "vfs_fallocate is failed : %d\n",
3285                                             err);
3286                 }
3287
3288                 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3289                 if (IS_ERR(context)) {
3290                         rc = PTR_ERR(context);
3291                         goto err_out1;
3292                 } else if (context) {
3293                         ksmbd_debug(SMB, "get query on disk id context\n");
3294                         query_disk_id = 1;
3295                 }
3296         }
3297
3298         memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3299
3300         rsp->StructureSize = cpu_to_le16(89);
3301         rcu_read_lock();
3302         opinfo = rcu_dereference(fp->f_opinfo);
3303         rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3304         rcu_read_unlock();
3305         rsp->Flags = 0;
3306         rsp->CreateAction = cpu_to_le32(file_info);
3307         rsp->CreationTime = cpu_to_le64(fp->create_time);
3308         time = ksmbd_UnixTimeToNT(stat.atime);
3309         rsp->LastAccessTime = cpu_to_le64(time);
3310         time = ksmbd_UnixTimeToNT(stat.mtime);
3311         rsp->LastWriteTime = cpu_to_le64(time);
3312         time = ksmbd_UnixTimeToNT(stat.ctime);
3313         rsp->ChangeTime = cpu_to_le64(time);
3314         rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3315                 cpu_to_le64(stat.blocks << 9);
3316         rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3317         rsp->FileAttributes = fp->f_ci->m_fattr;
3318
3319         rsp->Reserved2 = 0;
3320
3321         rsp->PersistentFileId = fp->persistent_id;
3322         rsp->VolatileFileId = fp->volatile_id;
3323
3324         rsp->CreateContextsOffset = 0;
3325         rsp->CreateContextsLength = 0;
3326         iov_len = offsetof(struct smb2_create_rsp, Buffer);
3327
3328         /* If lease is request send lease context response */
3329         if (opinfo && opinfo->is_lease) {
3330                 struct create_context *lease_ccontext;
3331
3332                 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3333                             name, opinfo->o_lease->state);
3334                 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3335
3336                 lease_ccontext = (struct create_context *)rsp->Buffer;
3337                 contxt_cnt++;
3338                 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3339                 le32_add_cpu(&rsp->CreateContextsLength,
3340                              conn->vals->create_lease_size);
3341                 iov_len += conn->vals->create_lease_size;
3342                 next_ptr = &lease_ccontext->Next;
3343                 next_off = conn->vals->create_lease_size;
3344         }
3345
3346         if (maximal_access_ctxt) {
3347                 struct create_context *mxac_ccontext;
3348
3349                 if (maximal_access == 0)
3350                         ksmbd_vfs_query_maximal_access(idmap,
3351                                                        path.dentry,
3352                                                        &maximal_access);
3353                 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3354                                 le32_to_cpu(rsp->CreateContextsLength));
3355                 contxt_cnt++;
3356                 create_mxac_rsp_buf(rsp->Buffer +
3357                                 le32_to_cpu(rsp->CreateContextsLength),
3358                                 le32_to_cpu(maximal_access));
3359                 le32_add_cpu(&rsp->CreateContextsLength,
3360                              conn->vals->create_mxac_size);
3361                 iov_len += conn->vals->create_mxac_size;
3362                 if (next_ptr)
3363                         *next_ptr = cpu_to_le32(next_off);
3364                 next_ptr = &mxac_ccontext->Next;
3365                 next_off = conn->vals->create_mxac_size;
3366         }
3367
3368         if (query_disk_id) {
3369                 struct create_context *disk_id_ccontext;
3370
3371                 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3372                                 le32_to_cpu(rsp->CreateContextsLength));
3373                 contxt_cnt++;
3374                 create_disk_id_rsp_buf(rsp->Buffer +
3375                                 le32_to_cpu(rsp->CreateContextsLength),
3376                                 stat.ino, tcon->id);
3377                 le32_add_cpu(&rsp->CreateContextsLength,
3378                              conn->vals->create_disk_id_size);
3379                 iov_len += conn->vals->create_disk_id_size;
3380                 if (next_ptr)
3381                         *next_ptr = cpu_to_le32(next_off);
3382                 next_ptr = &disk_id_ccontext->Next;
3383                 next_off = conn->vals->create_disk_id_size;
3384         }
3385
3386         if (posix_ctxt) {
3387                 contxt_cnt++;
3388                 create_posix_rsp_buf(rsp->Buffer +
3389                                 le32_to_cpu(rsp->CreateContextsLength),
3390                                 fp);
3391                 le32_add_cpu(&rsp->CreateContextsLength,
3392                              conn->vals->create_posix_size);
3393                 iov_len += conn->vals->create_posix_size;
3394                 if (next_ptr)
3395                         *next_ptr = cpu_to_le32(next_off);
3396         }
3397
3398         if (contxt_cnt > 0) {
3399                 rsp->CreateContextsOffset =
3400                         cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3401         }
3402
3403 err_out:
3404         if (rc && (file_present || created))
3405                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3406
3407 err_out1:
3408         ksmbd_revert_fsids(work);
3409
3410 err_out2:
3411         if (!rc) {
3412                 ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3413                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3414         }
3415         if (rc) {
3416                 if (rc == -EINVAL)
3417                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3418                 else if (rc == -EOPNOTSUPP)
3419                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3420                 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3421                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
3422                 else if (rc == -ENOENT)
3423                         rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3424                 else if (rc == -EPERM)
3425                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3426                 else if (rc == -EBUSY)
3427                         rsp->hdr.Status = STATUS_DELETE_PENDING;
3428                 else if (rc == -EBADF)
3429                         rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3430                 else if (rc == -ENOEXEC)
3431                         rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3432                 else if (rc == -ENXIO)
3433                         rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3434                 else if (rc == -EEXIST)
3435                         rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3436                 else if (rc == -EMFILE)
3437                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3438                 if (!rsp->hdr.Status)
3439                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3440
3441                 if (fp)
3442                         ksmbd_fd_put(work, fp);
3443                 smb2_set_err_rsp(work);
3444                 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3445         }
3446
3447         kfree(name);
3448         kfree(lc);
3449
3450         return 0;
3451 }
3452
3453 static int readdir_info_level_struct_sz(int info_level)
3454 {
3455         switch (info_level) {
3456         case FILE_FULL_DIRECTORY_INFORMATION:
3457                 return sizeof(struct file_full_directory_info);
3458         case FILE_BOTH_DIRECTORY_INFORMATION:
3459                 return sizeof(struct file_both_directory_info);
3460         case FILE_DIRECTORY_INFORMATION:
3461                 return sizeof(struct file_directory_info);
3462         case FILE_NAMES_INFORMATION:
3463                 return sizeof(struct file_names_info);
3464         case FILEID_FULL_DIRECTORY_INFORMATION:
3465                 return sizeof(struct file_id_full_dir_info);
3466         case FILEID_BOTH_DIRECTORY_INFORMATION:
3467                 return sizeof(struct file_id_both_directory_info);
3468         case SMB_FIND_FILE_POSIX_INFO:
3469                 return sizeof(struct smb2_posix_info);
3470         default:
3471                 return -EOPNOTSUPP;
3472         }
3473 }
3474
3475 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3476 {
3477         switch (info_level) {
3478         case FILE_FULL_DIRECTORY_INFORMATION:
3479         {
3480                 struct file_full_directory_info *ffdinfo;
3481
3482                 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3483                 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3484                 d_info->name = ffdinfo->FileName;
3485                 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3486                 return 0;
3487         }
3488         case FILE_BOTH_DIRECTORY_INFORMATION:
3489         {
3490                 struct file_both_directory_info *fbdinfo;
3491
3492                 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3493                 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3494                 d_info->name = fbdinfo->FileName;
3495                 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3496                 return 0;
3497         }
3498         case FILE_DIRECTORY_INFORMATION:
3499         {
3500                 struct file_directory_info *fdinfo;
3501
3502                 fdinfo = (struct file_directory_info *)d_info->rptr;
3503                 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3504                 d_info->name = fdinfo->FileName;
3505                 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3506                 return 0;
3507         }
3508         case FILE_NAMES_INFORMATION:
3509         {
3510                 struct file_names_info *fninfo;
3511
3512                 fninfo = (struct file_names_info *)d_info->rptr;
3513                 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3514                 d_info->name = fninfo->FileName;
3515                 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3516                 return 0;
3517         }
3518         case FILEID_FULL_DIRECTORY_INFORMATION:
3519         {
3520                 struct file_id_full_dir_info *dinfo;
3521
3522                 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3523                 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3524                 d_info->name = dinfo->FileName;
3525                 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3526                 return 0;
3527         }
3528         case FILEID_BOTH_DIRECTORY_INFORMATION:
3529         {
3530                 struct file_id_both_directory_info *fibdinfo;
3531
3532                 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3533                 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3534                 d_info->name = fibdinfo->FileName;
3535                 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3536                 return 0;
3537         }
3538         case SMB_FIND_FILE_POSIX_INFO:
3539         {
3540                 struct smb2_posix_info *posix_info;
3541
3542                 posix_info = (struct smb2_posix_info *)d_info->rptr;
3543                 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3544                 d_info->name = posix_info->name;
3545                 d_info->name_len = le32_to_cpu(posix_info->name_len);
3546                 return 0;
3547         }
3548         default:
3549                 return -EINVAL;
3550         }
3551 }
3552
3553 /**
3554  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3555  * buffer
3556  * @conn:       connection instance
3557  * @info_level: smb information level
3558  * @d_info:     structure included variables for query dir
3559  * @ksmbd_kstat:        ksmbd wrapper of dirent stat information
3560  *
3561  * if directory has many entries, find first can't read it fully.
3562  * find next might be called multiple times to read remaining dir entries
3563  *
3564  * Return:      0 on success, otherwise error
3565  */
3566 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3567                                        struct ksmbd_dir_info *d_info,
3568                                        struct ksmbd_kstat *ksmbd_kstat)
3569 {
3570         int next_entry_offset = 0;
3571         char *conv_name;
3572         int conv_len;
3573         void *kstat;
3574         int struct_sz, rc = 0;
3575
3576         conv_name = ksmbd_convert_dir_info_name(d_info,
3577                                                 conn->local_nls,
3578                                                 &conv_len);
3579         if (!conv_name)
3580                 return -ENOMEM;
3581
3582         /* Somehow the name has only terminating NULL bytes */
3583         if (conv_len < 0) {
3584                 rc = -EINVAL;
3585                 goto free_conv_name;
3586         }
3587
3588         struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3589         next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3590         d_info->last_entry_off_align = next_entry_offset - struct_sz;
3591
3592         if (next_entry_offset > d_info->out_buf_len) {
3593                 d_info->out_buf_len = 0;
3594                 rc = -ENOSPC;
3595                 goto free_conv_name;
3596         }
3597
3598         kstat = d_info->wptr;
3599         if (info_level != FILE_NAMES_INFORMATION)
3600                 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3601
3602         switch (info_level) {
3603         case FILE_FULL_DIRECTORY_INFORMATION:
3604         {
3605                 struct file_full_directory_info *ffdinfo;
3606
3607                 ffdinfo = (struct file_full_directory_info *)kstat;
3608                 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3609                 ffdinfo->EaSize =
3610                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3611                 if (ffdinfo->EaSize)
3612                         ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3613                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3614                         ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3615                 memcpy(ffdinfo->FileName, conv_name, conv_len);
3616                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3617                 break;
3618         }
3619         case FILE_BOTH_DIRECTORY_INFORMATION:
3620         {
3621                 struct file_both_directory_info *fbdinfo;
3622
3623                 fbdinfo = (struct file_both_directory_info *)kstat;
3624                 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3625                 fbdinfo->EaSize =
3626                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3627                 if (fbdinfo->EaSize)
3628                         fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3629                 fbdinfo->ShortNameLength = 0;
3630                 fbdinfo->Reserved = 0;
3631                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3632                         fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3633                 memcpy(fbdinfo->FileName, conv_name, conv_len);
3634                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3635                 break;
3636         }
3637         case FILE_DIRECTORY_INFORMATION:
3638         {
3639                 struct file_directory_info *fdinfo;
3640
3641                 fdinfo = (struct file_directory_info *)kstat;
3642                 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3643                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3644                         fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3645                 memcpy(fdinfo->FileName, conv_name, conv_len);
3646                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3647                 break;
3648         }
3649         case FILE_NAMES_INFORMATION:
3650         {
3651                 struct file_names_info *fninfo;
3652
3653                 fninfo = (struct file_names_info *)kstat;
3654                 fninfo->FileNameLength = cpu_to_le32(conv_len);
3655                 memcpy(fninfo->FileName, conv_name, conv_len);
3656                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3657                 break;
3658         }
3659         case FILEID_FULL_DIRECTORY_INFORMATION:
3660         {
3661                 struct file_id_full_dir_info *dinfo;
3662
3663                 dinfo = (struct file_id_full_dir_info *)kstat;
3664                 dinfo->FileNameLength = cpu_to_le32(conv_len);
3665                 dinfo->EaSize =
3666                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3667                 if (dinfo->EaSize)
3668                         dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3669                 dinfo->Reserved = 0;
3670                 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3671                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3672                         dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3673                 memcpy(dinfo->FileName, conv_name, conv_len);
3674                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3675                 break;
3676         }
3677         case FILEID_BOTH_DIRECTORY_INFORMATION:
3678         {
3679                 struct file_id_both_directory_info *fibdinfo;
3680
3681                 fibdinfo = (struct file_id_both_directory_info *)kstat;
3682                 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3683                 fibdinfo->EaSize =
3684                         smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3685                 if (fibdinfo->EaSize)
3686                         fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3687                 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3688                 fibdinfo->ShortNameLength = 0;
3689                 fibdinfo->Reserved = 0;
3690                 fibdinfo->Reserved2 = cpu_to_le16(0);
3691                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3692                         fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3693                 memcpy(fibdinfo->FileName, conv_name, conv_len);
3694                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3695                 break;
3696         }
3697         case SMB_FIND_FILE_POSIX_INFO:
3698         {
3699                 struct smb2_posix_info *posix_info;
3700                 u64 time;
3701
3702                 posix_info = (struct smb2_posix_info *)kstat;
3703                 posix_info->Ignored = 0;
3704                 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3705                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3706                 posix_info->ChangeTime = cpu_to_le64(time);
3707                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3708                 posix_info->LastAccessTime = cpu_to_le64(time);
3709                 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3710                 posix_info->LastWriteTime = cpu_to_le64(time);
3711                 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3712                 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3713                 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3714                 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3715                 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3716                 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3717                 posix_info->DosAttributes =
3718                         S_ISDIR(ksmbd_kstat->kstat->mode) ?
3719                                 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3720                 if (d_info->hide_dot_file && d_info->name[0] == '.')
3721                         posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3722                 /*
3723                  * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3724                  * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3725                  *                sub_auth(4 * 1(num_subauth)) + RID(4).
3726                  */
3727                 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3728                           SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3729                 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3730                           SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3731                 memcpy(posix_info->name, conv_name, conv_len);
3732                 posix_info->name_len = cpu_to_le32(conv_len);
3733                 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3734                 break;
3735         }
3736
3737         } /* switch (info_level) */
3738
3739         d_info->last_entry_offset = d_info->data_count;
3740         d_info->data_count += next_entry_offset;
3741         d_info->out_buf_len -= next_entry_offset;
3742         d_info->wptr += next_entry_offset;
3743
3744         ksmbd_debug(SMB,
3745                     "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3746                     info_level, d_info->out_buf_len,
3747                     next_entry_offset, d_info->data_count);
3748
3749 free_conv_name:
3750         kfree(conv_name);
3751         return rc;
3752 }
3753
3754 struct smb2_query_dir_private {
3755         struct ksmbd_work       *work;
3756         char                    *search_pattern;
3757         struct ksmbd_file       *dir_fp;
3758
3759         struct ksmbd_dir_info   *d_info;
3760         int                     info_level;
3761 };
3762
3763 static void lock_dir(struct ksmbd_file *dir_fp)
3764 {
3765         struct dentry *dir = dir_fp->filp->f_path.dentry;
3766
3767         inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3768 }
3769
3770 static void unlock_dir(struct ksmbd_file *dir_fp)
3771 {
3772         struct dentry *dir = dir_fp->filp->f_path.dentry;
3773
3774         inode_unlock(d_inode(dir));
3775 }
3776
3777 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3778 {
3779         struct mnt_idmap        *idmap = file_mnt_idmap(priv->dir_fp->filp);
3780         struct kstat            kstat;
3781         struct ksmbd_kstat      ksmbd_kstat;
3782         int                     rc;
3783         int                     i;
3784
3785         for (i = 0; i < priv->d_info->num_entry; i++) {
3786                 struct dentry *dent;
3787
3788                 if (dentry_name(priv->d_info, priv->info_level))
3789                         return -EINVAL;
3790
3791                 lock_dir(priv->dir_fp);
3792                 dent = lookup_one(idmap, priv->d_info->name,
3793                                   priv->dir_fp->filp->f_path.dentry,
3794                                   priv->d_info->name_len);
3795                 unlock_dir(priv->dir_fp);
3796
3797                 if (IS_ERR(dent)) {
3798                         ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3799                                     priv->d_info->name,
3800                                     PTR_ERR(dent));
3801                         continue;
3802                 }
3803                 if (unlikely(d_is_negative(dent))) {
3804                         dput(dent);
3805                         ksmbd_debug(SMB, "Negative dentry `%s'\n",
3806                                     priv->d_info->name);
3807                         continue;
3808                 }
3809
3810                 ksmbd_kstat.kstat = &kstat;
3811                 if (priv->info_level != FILE_NAMES_INFORMATION)
3812                         ksmbd_vfs_fill_dentry_attrs(priv->work,
3813                                                     idmap,
3814                                                     dent,
3815                                                     &ksmbd_kstat);
3816
3817                 rc = smb2_populate_readdir_entry(priv->work->conn,
3818                                                  priv->info_level,
3819                                                  priv->d_info,
3820                                                  &ksmbd_kstat);
3821                 dput(dent);
3822                 if (rc)
3823                         return rc;
3824         }
3825         return 0;
3826 }
3827
3828 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3829                                    int info_level)
3830 {
3831         int struct_sz;
3832         int conv_len;
3833         int next_entry_offset;
3834
3835         struct_sz = readdir_info_level_struct_sz(info_level);
3836         if (struct_sz == -EOPNOTSUPP)
3837                 return -EOPNOTSUPP;
3838
3839         conv_len = (d_info->name_len + 1) * 2;
3840         next_entry_offset = ALIGN(struct_sz + conv_len,
3841                                   KSMBD_DIR_INFO_ALIGNMENT);
3842
3843         if (next_entry_offset > d_info->out_buf_len) {
3844                 d_info->out_buf_len = 0;
3845                 return -ENOSPC;
3846         }
3847
3848         switch (info_level) {
3849         case FILE_FULL_DIRECTORY_INFORMATION:
3850         {
3851                 struct file_full_directory_info *ffdinfo;
3852
3853                 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3854                 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3855                 ffdinfo->FileName[d_info->name_len] = 0x00;
3856                 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3857                 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3858                 break;
3859         }
3860         case FILE_BOTH_DIRECTORY_INFORMATION:
3861         {
3862                 struct file_both_directory_info *fbdinfo;
3863
3864                 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3865                 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3866                 fbdinfo->FileName[d_info->name_len] = 0x00;
3867                 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3868                 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3869                 break;
3870         }
3871         case FILE_DIRECTORY_INFORMATION:
3872         {
3873                 struct file_directory_info *fdinfo;
3874
3875                 fdinfo = (struct file_directory_info *)d_info->wptr;
3876                 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3877                 fdinfo->FileName[d_info->name_len] = 0x00;
3878                 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3879                 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3880                 break;
3881         }
3882         case FILE_NAMES_INFORMATION:
3883         {
3884                 struct file_names_info *fninfo;
3885
3886                 fninfo = (struct file_names_info *)d_info->wptr;
3887                 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3888                 fninfo->FileName[d_info->name_len] = 0x00;
3889                 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3890                 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3891                 break;
3892         }
3893         case FILEID_FULL_DIRECTORY_INFORMATION:
3894         {
3895                 struct file_id_full_dir_info *dinfo;
3896
3897                 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3898                 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3899                 dinfo->FileName[d_info->name_len] = 0x00;
3900                 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3901                 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3902                 break;
3903         }
3904         case FILEID_BOTH_DIRECTORY_INFORMATION:
3905         {
3906                 struct file_id_both_directory_info *fibdinfo;
3907
3908                 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3909                 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3910                 fibdinfo->FileName[d_info->name_len] = 0x00;
3911                 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3912                 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3913                 break;
3914         }
3915         case SMB_FIND_FILE_POSIX_INFO:
3916         {
3917                 struct smb2_posix_info *posix_info;
3918
3919                 posix_info = (struct smb2_posix_info *)d_info->wptr;
3920                 memcpy(posix_info->name, d_info->name, d_info->name_len);
3921                 posix_info->name[d_info->name_len] = 0x00;
3922                 posix_info->name_len = cpu_to_le32(d_info->name_len);
3923                 posix_info->NextEntryOffset =
3924                         cpu_to_le32(next_entry_offset);
3925                 break;
3926         }
3927         } /* switch (info_level) */
3928
3929         d_info->num_entry++;
3930         d_info->out_buf_len -= next_entry_offset;
3931         d_info->wptr += next_entry_offset;
3932         return 0;
3933 }
3934
3935 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
3936                        loff_t offset, u64 ino, unsigned int d_type)
3937 {
3938         struct ksmbd_readdir_data       *buf;
3939         struct smb2_query_dir_private   *priv;
3940         struct ksmbd_dir_info           *d_info;
3941         int                             rc;
3942
3943         buf     = container_of(ctx, struct ksmbd_readdir_data, ctx);
3944         priv    = buf->private;
3945         d_info  = priv->d_info;
3946
3947         /* dot and dotdot entries are already reserved */
3948         if (!strcmp(".", name) || !strcmp("..", name))
3949                 return true;
3950         if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3951                 return true;
3952         if (!match_pattern(name, namlen, priv->search_pattern))
3953                 return true;
3954
3955         d_info->name            = name;
3956         d_info->name_len        = namlen;
3957         rc = reserve_populate_dentry(d_info, priv->info_level);
3958         if (rc)
3959                 return false;
3960         if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
3961                 d_info->out_buf_len = 0;
3962         return true;
3963 }
3964
3965 static int verify_info_level(int info_level)
3966 {
3967         switch (info_level) {
3968         case FILE_FULL_DIRECTORY_INFORMATION:
3969         case FILE_BOTH_DIRECTORY_INFORMATION:
3970         case FILE_DIRECTORY_INFORMATION:
3971         case FILE_NAMES_INFORMATION:
3972         case FILEID_FULL_DIRECTORY_INFORMATION:
3973         case FILEID_BOTH_DIRECTORY_INFORMATION:
3974         case SMB_FIND_FILE_POSIX_INFO:
3975                 break;
3976         default:
3977                 return -EOPNOTSUPP;
3978         }
3979
3980         return 0;
3981 }
3982
3983 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
3984 {
3985         int free_len;
3986
3987         free_len = (int)(work->response_sz -
3988                 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
3989         return free_len;
3990 }
3991
3992 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
3993                                      unsigned short hdr2_len,
3994                                      unsigned int out_buf_len)
3995 {
3996         int free_len;
3997
3998         if (out_buf_len > work->conn->vals->max_trans_size)
3999                 return -EINVAL;
4000
4001         free_len = smb2_resp_buf_len(work, hdr2_len);
4002         if (free_len < 0)
4003                 return -EINVAL;
4004
4005         return min_t(int, out_buf_len, free_len);
4006 }
4007
4008 int smb2_query_dir(struct ksmbd_work *work)
4009 {
4010         struct ksmbd_conn *conn = work->conn;
4011         struct smb2_query_directory_req *req;
4012         struct smb2_query_directory_rsp *rsp;
4013         struct ksmbd_share_config *share = work->tcon->share_conf;
4014         struct ksmbd_file *dir_fp = NULL;
4015         struct ksmbd_dir_info d_info;
4016         int rc = 0;
4017         char *srch_ptr = NULL;
4018         unsigned char srch_flag;
4019         int buffer_sz;
4020         struct smb2_query_dir_private query_dir_private = {NULL, };
4021
4022         WORK_BUFFERS(work, req, rsp);
4023
4024         if (ksmbd_override_fsids(work)) {
4025                 rsp->hdr.Status = STATUS_NO_MEMORY;
4026                 smb2_set_err_rsp(work);
4027                 return -ENOMEM;
4028         }
4029
4030         rc = verify_info_level(req->FileInformationClass);
4031         if (rc) {
4032                 rc = -EFAULT;
4033                 goto err_out2;
4034         }
4035
4036         dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4037         if (!dir_fp) {
4038                 rc = -EBADF;
4039                 goto err_out2;
4040         }
4041
4042         if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4043             inode_permission(file_mnt_idmap(dir_fp->filp),
4044                              file_inode(dir_fp->filp),
4045                              MAY_READ | MAY_EXEC)) {
4046                 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4047                 rc = -EACCES;
4048                 goto err_out2;
4049         }
4050
4051         if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4052                 pr_err("can't do query dir for a file\n");
4053                 rc = -EINVAL;
4054                 goto err_out2;
4055         }
4056
4057         srch_flag = req->Flags;
4058         srch_ptr = smb_strndup_from_utf16(req->Buffer,
4059                                           le16_to_cpu(req->FileNameLength), 1,
4060                                           conn->local_nls);
4061         if (IS_ERR(srch_ptr)) {
4062                 ksmbd_debug(SMB, "Search Pattern not found\n");
4063                 rc = -EINVAL;
4064                 goto err_out2;
4065         } else {
4066                 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4067         }
4068
4069         if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4070                 ksmbd_debug(SMB, "Restart directory scan\n");
4071                 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4072         }
4073
4074         memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4075         d_info.wptr = (char *)rsp->Buffer;
4076         d_info.rptr = (char *)rsp->Buffer;
4077         d_info.out_buf_len =
4078                 smb2_calc_max_out_buf_len(work, 8,
4079                                           le32_to_cpu(req->OutputBufferLength));
4080         if (d_info.out_buf_len < 0) {
4081                 rc = -EINVAL;
4082                 goto err_out;
4083         }
4084         d_info.flags = srch_flag;
4085
4086         /*
4087          * reserve dot and dotdot entries in head of buffer
4088          * in first response
4089          */
4090         rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4091                                                dir_fp, &d_info, srch_ptr,
4092                                                smb2_populate_readdir_entry);
4093         if (rc == -ENOSPC)
4094                 rc = 0;
4095         else if (rc)
4096                 goto err_out;
4097
4098         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4099                 d_info.hide_dot_file = true;
4100
4101         buffer_sz                               = d_info.out_buf_len;
4102         d_info.rptr                             = d_info.wptr;
4103         query_dir_private.work                  = work;
4104         query_dir_private.search_pattern        = srch_ptr;
4105         query_dir_private.dir_fp                = dir_fp;
4106         query_dir_private.d_info                = &d_info;
4107         query_dir_private.info_level            = req->FileInformationClass;
4108         dir_fp->readdir_data.private            = &query_dir_private;
4109         set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4110
4111         rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4112         /*
4113          * req->OutputBufferLength is too small to contain even one entry.
4114          * In this case, it immediately returns OutputBufferLength 0 to client.
4115          */
4116         if (!d_info.out_buf_len && !d_info.num_entry)
4117                 goto no_buf_len;
4118         if (rc > 0 || rc == -ENOSPC)
4119                 rc = 0;
4120         else if (rc)
4121                 goto err_out;
4122
4123         d_info.wptr = d_info.rptr;
4124         d_info.out_buf_len = buffer_sz;
4125         rc = process_query_dir_entries(&query_dir_private);
4126         if (rc)
4127                 goto err_out;
4128
4129         if (!d_info.data_count && d_info.out_buf_len >= 0) {
4130                 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4131                         rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4132                 } else {
4133                         dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4134                         rsp->hdr.Status = STATUS_NO_MORE_FILES;
4135                 }
4136                 rsp->StructureSize = cpu_to_le16(9);
4137                 rsp->OutputBufferOffset = cpu_to_le16(0);
4138                 rsp->OutputBufferLength = cpu_to_le32(0);
4139                 rsp->Buffer[0] = 0;
4140                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4141                                        sizeof(struct smb2_query_directory_rsp));
4142                 if (rc)
4143                         goto err_out;
4144         } else {
4145 no_buf_len:
4146                 ((struct file_directory_info *)
4147                 ((char *)rsp->Buffer + d_info.last_entry_offset))
4148                 ->NextEntryOffset = 0;
4149                 if (d_info.data_count >= d_info.last_entry_off_align)
4150                         d_info.data_count -= d_info.last_entry_off_align;
4151
4152                 rsp->StructureSize = cpu_to_le16(9);
4153                 rsp->OutputBufferOffset = cpu_to_le16(72);
4154                 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4155                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4156                                        offsetof(struct smb2_query_directory_rsp, Buffer) +
4157                                        d_info.data_count);
4158                 if (rc)
4159                         goto err_out;
4160         }
4161
4162         kfree(srch_ptr);
4163         ksmbd_fd_put(work, dir_fp);
4164         ksmbd_revert_fsids(work);
4165         return 0;
4166
4167 err_out:
4168         pr_err("error while processing smb2 query dir rc = %d\n", rc);
4169         kfree(srch_ptr);
4170
4171 err_out2:
4172         if (rc == -EINVAL)
4173                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4174         else if (rc == -EACCES)
4175                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4176         else if (rc == -ENOENT)
4177                 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4178         else if (rc == -EBADF)
4179                 rsp->hdr.Status = STATUS_FILE_CLOSED;
4180         else if (rc == -ENOMEM)
4181                 rsp->hdr.Status = STATUS_NO_MEMORY;
4182         else if (rc == -EFAULT)
4183                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4184         else if (rc == -EIO)
4185                 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4186         if (!rsp->hdr.Status)
4187                 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4188
4189         smb2_set_err_rsp(work);
4190         ksmbd_fd_put(work, dir_fp);
4191         ksmbd_revert_fsids(work);
4192         return 0;
4193 }
4194
4195 /**
4196  * buffer_check_err() - helper function to check buffer errors
4197  * @reqOutputBufferLength:      max buffer length expected in command response
4198  * @rsp:                query info response buffer contains output buffer length
4199  * @rsp_org:            base response buffer pointer in case of chained response
4200  *
4201  * Return:      0 on success, otherwise error
4202  */
4203 static int buffer_check_err(int reqOutputBufferLength,
4204                             struct smb2_query_info_rsp *rsp,
4205                             void *rsp_org)
4206 {
4207         if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4208                 pr_err("Invalid Buffer Size Requested\n");
4209                 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4210                 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4211                 return -EINVAL;
4212         }
4213         return 0;
4214 }
4215
4216 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4217                                    void *rsp_org)
4218 {
4219         struct smb2_file_standard_info *sinfo;
4220
4221         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4222
4223         sinfo->AllocationSize = cpu_to_le64(4096);
4224         sinfo->EndOfFile = cpu_to_le64(0);
4225         sinfo->NumberOfLinks = cpu_to_le32(1);
4226         sinfo->DeletePending = 1;
4227         sinfo->Directory = 0;
4228         rsp->OutputBufferLength =
4229                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4230 }
4231
4232 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4233                                    void *rsp_org)
4234 {
4235         struct smb2_file_internal_info *file_info;
4236
4237         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4238
4239         /* any unique number */
4240         file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4241         rsp->OutputBufferLength =
4242                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4243 }
4244
4245 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4246                                    struct smb2_query_info_req *req,
4247                                    struct smb2_query_info_rsp *rsp,
4248                                    void *rsp_org)
4249 {
4250         u64 id;
4251         int rc;
4252
4253         /*
4254          * Windows can sometime send query file info request on
4255          * pipe without opening it, checking error condition here
4256          */
4257         id = req->VolatileFileId;
4258         if (!ksmbd_session_rpc_method(sess, id))
4259                 return -ENOENT;
4260
4261         ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4262                     req->FileInfoClass, req->VolatileFileId);
4263
4264         switch (req->FileInfoClass) {
4265         case FILE_STANDARD_INFORMATION:
4266                 get_standard_info_pipe(rsp, rsp_org);
4267                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4268                                       rsp, rsp_org);
4269                 break;
4270         case FILE_INTERNAL_INFORMATION:
4271                 get_internal_info_pipe(rsp, id, rsp_org);
4272                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4273                                       rsp, rsp_org);
4274                 break;
4275         default:
4276                 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4277                             req->FileInfoClass);
4278                 rc = -EOPNOTSUPP;
4279         }
4280         return rc;
4281 }
4282
4283 /**
4284  * smb2_get_ea() - handler for smb2 get extended attribute command
4285  * @work:       smb work containing query info command buffer
4286  * @fp:         ksmbd_file pointer
4287  * @req:        get extended attribute request
4288  * @rsp:        response buffer pointer
4289  * @rsp_org:    base response buffer pointer in case of chained response
4290  *
4291  * Return:      0 on success, otherwise error
4292  */
4293 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4294                        struct smb2_query_info_req *req,
4295                        struct smb2_query_info_rsp *rsp, void *rsp_org)
4296 {
4297         struct smb2_ea_info *eainfo, *prev_eainfo;
4298         char *name, *ptr, *xattr_list = NULL, *buf;
4299         int rc, name_len, value_len, xattr_list_len, idx;
4300         ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4301         struct smb2_ea_info_req *ea_req = NULL;
4302         const struct path *path;
4303         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4304
4305         if (!(fp->daccess & FILE_READ_EA_LE)) {
4306                 pr_err("Not permitted to read ext attr : 0x%x\n",
4307                        fp->daccess);
4308                 return -EACCES;
4309         }
4310
4311         path = &fp->filp->f_path;
4312         /* single EA entry is requested with given user.* name */
4313         if (req->InputBufferLength) {
4314                 if (le32_to_cpu(req->InputBufferLength) <
4315                     sizeof(struct smb2_ea_info_req))
4316                         return -EINVAL;
4317
4318                 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4319         } else {
4320                 /* need to send all EAs, if no specific EA is requested*/
4321                 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4322                         ksmbd_debug(SMB,
4323                                     "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4324                                     le32_to_cpu(req->Flags));
4325         }
4326
4327         buf_free_len =
4328                 smb2_calc_max_out_buf_len(work, 8,
4329                                           le32_to_cpu(req->OutputBufferLength));
4330         if (buf_free_len < 0)
4331                 return -EINVAL;
4332
4333         rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4334         if (rc < 0) {
4335                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4336                 goto out;
4337         } else if (!rc) { /* there is no EA in the file */
4338                 ksmbd_debug(SMB, "no ea data in the file\n");
4339                 goto done;
4340         }
4341         xattr_list_len = rc;
4342
4343         ptr = (char *)rsp->Buffer;
4344         eainfo = (struct smb2_ea_info *)ptr;
4345         prev_eainfo = eainfo;
4346         idx = 0;
4347
4348         while (idx < xattr_list_len) {
4349                 name = xattr_list + idx;
4350                 name_len = strlen(name);
4351
4352                 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4353                 idx += name_len + 1;
4354
4355                 /*
4356                  * CIFS does not support EA other than user.* namespace,
4357                  * still keep the framework generic, to list other attrs
4358                  * in future.
4359                  */
4360                 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4361                         continue;
4362
4363                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4364                              STREAM_PREFIX_LEN))
4365                         continue;
4366
4367                 if (req->InputBufferLength &&
4368                     strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4369                             ea_req->EaNameLength))
4370                         continue;
4371
4372                 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4373                              DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4374                         continue;
4375
4376                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4377                         name_len -= XATTR_USER_PREFIX_LEN;
4378
4379                 ptr = eainfo->name + name_len + 1;
4380                 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4381                                 name_len + 1);
4382                 /* bailout if xattr can't fit in buf_free_len */
4383                 value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4384                                                name, &buf);
4385                 if (value_len <= 0) {
4386                         rc = -ENOENT;
4387                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
4388                         goto out;
4389                 }
4390
4391                 buf_free_len -= value_len;
4392                 if (buf_free_len < 0) {
4393                         kfree(buf);
4394                         break;
4395                 }
4396
4397                 memcpy(ptr, buf, value_len);
4398                 kfree(buf);
4399
4400                 ptr += value_len;
4401                 eainfo->Flags = 0;
4402                 eainfo->EaNameLength = name_len;
4403
4404                 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4405                         memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4406                                name_len);
4407                 else
4408                         memcpy(eainfo->name, name, name_len);
4409
4410                 eainfo->name[name_len] = '\0';
4411                 eainfo->EaValueLength = cpu_to_le16(value_len);
4412                 next_offset = offsetof(struct smb2_ea_info, name) +
4413                         name_len + 1 + value_len;
4414
4415                 /* align next xattr entry at 4 byte bundary */
4416                 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4417                 if (alignment_bytes) {
4418                         memset(ptr, '\0', alignment_bytes);
4419                         ptr += alignment_bytes;
4420                         next_offset += alignment_bytes;
4421                         buf_free_len -= alignment_bytes;
4422                 }
4423                 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4424                 prev_eainfo = eainfo;
4425                 eainfo = (struct smb2_ea_info *)ptr;
4426                 rsp_data_cnt += next_offset;
4427
4428                 if (req->InputBufferLength) {
4429                         ksmbd_debug(SMB, "single entry requested\n");
4430                         break;
4431                 }
4432         }
4433
4434         /* no more ea entries */
4435         prev_eainfo->NextEntryOffset = 0;
4436 done:
4437         rc = 0;
4438         if (rsp_data_cnt == 0)
4439                 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4440         rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4441 out:
4442         kvfree(xattr_list);
4443         return rc;
4444 }
4445
4446 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4447                                  struct ksmbd_file *fp, void *rsp_org)
4448 {
4449         struct smb2_file_access_info *file_info;
4450
4451         file_info = (struct smb2_file_access_info *)rsp->Buffer;
4452         file_info->AccessFlags = fp->daccess;
4453         rsp->OutputBufferLength =
4454                 cpu_to_le32(sizeof(struct smb2_file_access_info));
4455 }
4456
4457 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4458                                struct ksmbd_file *fp, void *rsp_org)
4459 {
4460         struct smb2_file_basic_info *basic_info;
4461         struct kstat stat;
4462         u64 time;
4463
4464         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4465                 pr_err("no right to read the attributes : 0x%x\n",
4466                        fp->daccess);
4467                 return -EACCES;
4468         }
4469
4470         basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4471         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4472                          file_inode(fp->filp), &stat);
4473         basic_info->CreationTime = cpu_to_le64(fp->create_time);
4474         time = ksmbd_UnixTimeToNT(stat.atime);
4475         basic_info->LastAccessTime = cpu_to_le64(time);
4476         time = ksmbd_UnixTimeToNT(stat.mtime);
4477         basic_info->LastWriteTime = cpu_to_le64(time);
4478         time = ksmbd_UnixTimeToNT(stat.ctime);
4479         basic_info->ChangeTime = cpu_to_le64(time);
4480         basic_info->Attributes = fp->f_ci->m_fattr;
4481         basic_info->Pad1 = 0;
4482         rsp->OutputBufferLength =
4483                 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4484         return 0;
4485 }
4486
4487 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4488                                    struct ksmbd_file *fp, void *rsp_org)
4489 {
4490         struct smb2_file_standard_info *sinfo;
4491         unsigned int delete_pending;
4492         struct inode *inode;
4493         struct kstat stat;
4494
4495         inode = file_inode(fp->filp);
4496         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4497
4498         sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4499         delete_pending = ksmbd_inode_pending_delete(fp);
4500
4501         sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4502         sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4503         sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4504         sinfo->DeletePending = delete_pending;
4505         sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4506         rsp->OutputBufferLength =
4507                 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4508 }
4509
4510 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4511                                     void *rsp_org)
4512 {
4513         struct smb2_file_alignment_info *file_info;
4514
4515         file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4516         file_info->AlignmentRequirement = 0;
4517         rsp->OutputBufferLength =
4518                 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4519 }
4520
4521 static int get_file_all_info(struct ksmbd_work *work,
4522                              struct smb2_query_info_rsp *rsp,
4523                              struct ksmbd_file *fp,
4524                              void *rsp_org)
4525 {
4526         struct ksmbd_conn *conn = work->conn;
4527         struct smb2_file_all_info *file_info;
4528         unsigned int delete_pending;
4529         struct inode *inode;
4530         struct kstat stat;
4531         int conv_len;
4532         char *filename;
4533         u64 time;
4534
4535         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4536                 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4537                             fp->daccess);
4538                 return -EACCES;
4539         }
4540
4541         filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4542         if (IS_ERR(filename))
4543                 return PTR_ERR(filename);
4544
4545         inode = file_inode(fp->filp);
4546         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4547
4548         ksmbd_debug(SMB, "filename = %s\n", filename);
4549         delete_pending = ksmbd_inode_pending_delete(fp);
4550         file_info = (struct smb2_file_all_info *)rsp->Buffer;
4551
4552         file_info->CreationTime = cpu_to_le64(fp->create_time);
4553         time = ksmbd_UnixTimeToNT(stat.atime);
4554         file_info->LastAccessTime = cpu_to_le64(time);
4555         time = ksmbd_UnixTimeToNT(stat.mtime);
4556         file_info->LastWriteTime = cpu_to_le64(time);
4557         time = ksmbd_UnixTimeToNT(stat.ctime);
4558         file_info->ChangeTime = cpu_to_le64(time);
4559         file_info->Attributes = fp->f_ci->m_fattr;
4560         file_info->Pad1 = 0;
4561         file_info->AllocationSize =
4562                 cpu_to_le64(inode->i_blocks << 9);
4563         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4564         file_info->NumberOfLinks =
4565                         cpu_to_le32(get_nlink(&stat) - delete_pending);
4566         file_info->DeletePending = delete_pending;
4567         file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4568         file_info->Pad2 = 0;
4569         file_info->IndexNumber = cpu_to_le64(stat.ino);
4570         file_info->EASize = 0;
4571         file_info->AccessFlags = fp->daccess;
4572         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4573         file_info->Mode = fp->coption;
4574         file_info->AlignmentRequirement = 0;
4575         conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4576                                      PATH_MAX, conn->local_nls, 0);
4577         conv_len *= 2;
4578         file_info->FileNameLength = cpu_to_le32(conv_len);
4579         rsp->OutputBufferLength =
4580                 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4581         kfree(filename);
4582         return 0;
4583 }
4584
4585 static void get_file_alternate_info(struct ksmbd_work *work,
4586                                     struct smb2_query_info_rsp *rsp,
4587                                     struct ksmbd_file *fp,
4588                                     void *rsp_org)
4589 {
4590         struct ksmbd_conn *conn = work->conn;
4591         struct smb2_file_alt_name_info *file_info;
4592         struct dentry *dentry = fp->filp->f_path.dentry;
4593         int conv_len;
4594
4595         spin_lock(&dentry->d_lock);
4596         file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4597         conv_len = ksmbd_extract_shortname(conn,
4598                                            dentry->d_name.name,
4599                                            file_info->FileName);
4600         spin_unlock(&dentry->d_lock);
4601         file_info->FileNameLength = cpu_to_le32(conv_len);
4602         rsp->OutputBufferLength =
4603                 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4604 }
4605
4606 static void get_file_stream_info(struct ksmbd_work *work,
4607                                  struct smb2_query_info_rsp *rsp,
4608                                  struct ksmbd_file *fp,
4609                                  void *rsp_org)
4610 {
4611         struct ksmbd_conn *conn = work->conn;
4612         struct smb2_file_stream_info *file_info;
4613         char *stream_name, *xattr_list = NULL, *stream_buf;
4614         struct kstat stat;
4615         const struct path *path = &fp->filp->f_path;
4616         ssize_t xattr_list_len;
4617         int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4618         int buf_free_len;
4619         struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4620
4621         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4622                          file_inode(fp->filp), &stat);
4623         file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4624
4625         buf_free_len =
4626                 smb2_calc_max_out_buf_len(work, 8,
4627                                           le32_to_cpu(req->OutputBufferLength));
4628         if (buf_free_len < 0)
4629                 goto out;
4630
4631         xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4632         if (xattr_list_len < 0) {
4633                 goto out;
4634         } else if (!xattr_list_len) {
4635                 ksmbd_debug(SMB, "empty xattr in the file\n");
4636                 goto out;
4637         }
4638
4639         while (idx < xattr_list_len) {
4640                 stream_name = xattr_list + idx;
4641                 streamlen = strlen(stream_name);
4642                 idx += streamlen + 1;
4643
4644                 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4645
4646                 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4647                             STREAM_PREFIX, STREAM_PREFIX_LEN))
4648                         continue;
4649
4650                 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4651                                 STREAM_PREFIX_LEN);
4652                 streamlen = stream_name_len;
4653
4654                 /* plus : size */
4655                 streamlen += 1;
4656                 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4657                 if (!stream_buf)
4658                         break;
4659
4660                 streamlen = snprintf(stream_buf, streamlen + 1,
4661                                      ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4662
4663                 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4664                 if (next > buf_free_len) {
4665                         kfree(stream_buf);
4666                         break;
4667                 }
4668
4669                 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4670                 streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4671                                                stream_buf, streamlen,
4672                                                conn->local_nls, 0);
4673                 streamlen *= 2;
4674                 kfree(stream_buf);
4675                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4676                 file_info->StreamSize = cpu_to_le64(stream_name_len);
4677                 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4678
4679                 nbytes += next;
4680                 buf_free_len -= next;
4681                 file_info->NextEntryOffset = cpu_to_le32(next);
4682         }
4683
4684 out:
4685         if (!S_ISDIR(stat.mode) &&
4686             buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4687                 file_info = (struct smb2_file_stream_info *)
4688                         &rsp->Buffer[nbytes];
4689                 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4690                                               "::$DATA", 7, conn->local_nls, 0);
4691                 streamlen *= 2;
4692                 file_info->StreamNameLength = cpu_to_le32(streamlen);
4693                 file_info->StreamSize = cpu_to_le64(stat.size);
4694                 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4695                 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4696         }
4697
4698         /* last entry offset should be 0 */
4699         file_info->NextEntryOffset = 0;
4700         kvfree(xattr_list);
4701
4702         rsp->OutputBufferLength = cpu_to_le32(nbytes);
4703 }
4704
4705 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4706                                    struct ksmbd_file *fp, void *rsp_org)
4707 {
4708         struct smb2_file_internal_info *file_info;
4709         struct kstat stat;
4710
4711         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4712                          file_inode(fp->filp), &stat);
4713         file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4714         file_info->IndexNumber = cpu_to_le64(stat.ino);
4715         rsp->OutputBufferLength =
4716                 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4717 }
4718
4719 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4720                                       struct ksmbd_file *fp, void *rsp_org)
4721 {
4722         struct smb2_file_ntwrk_info *file_info;
4723         struct inode *inode;
4724         struct kstat stat;
4725         u64 time;
4726
4727         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4728                 pr_err("no right to read the attributes : 0x%x\n",
4729                        fp->daccess);
4730                 return -EACCES;
4731         }
4732
4733         file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4734
4735         inode = file_inode(fp->filp);
4736         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4737
4738         file_info->CreationTime = cpu_to_le64(fp->create_time);
4739         time = ksmbd_UnixTimeToNT(stat.atime);
4740         file_info->LastAccessTime = cpu_to_le64(time);
4741         time = ksmbd_UnixTimeToNT(stat.mtime);
4742         file_info->LastWriteTime = cpu_to_le64(time);
4743         time = ksmbd_UnixTimeToNT(stat.ctime);
4744         file_info->ChangeTime = cpu_to_le64(time);
4745         file_info->Attributes = fp->f_ci->m_fattr;
4746         file_info->AllocationSize =
4747                 cpu_to_le64(inode->i_blocks << 9);
4748         file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4749         file_info->Reserved = cpu_to_le32(0);
4750         rsp->OutputBufferLength =
4751                 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4752         return 0;
4753 }
4754
4755 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4756 {
4757         struct smb2_file_ea_info *file_info;
4758
4759         file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4760         file_info->EASize = 0;
4761         rsp->OutputBufferLength =
4762                 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4763 }
4764
4765 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4766                                    struct ksmbd_file *fp, void *rsp_org)
4767 {
4768         struct smb2_file_pos_info *file_info;
4769
4770         file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4771         file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4772         rsp->OutputBufferLength =
4773                 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4774 }
4775
4776 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4777                                struct ksmbd_file *fp, void *rsp_org)
4778 {
4779         struct smb2_file_mode_info *file_info;
4780
4781         file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4782         file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4783         rsp->OutputBufferLength =
4784                 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4785 }
4786
4787 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4788                                       struct ksmbd_file *fp, void *rsp_org)
4789 {
4790         struct smb2_file_comp_info *file_info;
4791         struct kstat stat;
4792
4793         generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4794                          file_inode(fp->filp), &stat);
4795
4796         file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4797         file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4798         file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4799         file_info->CompressionUnitShift = 0;
4800         file_info->ChunkShift = 0;
4801         file_info->ClusterShift = 0;
4802         memset(&file_info->Reserved[0], 0, 3);
4803
4804         rsp->OutputBufferLength =
4805                 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4806 }
4807
4808 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4809                                        struct ksmbd_file *fp, void *rsp_org)
4810 {
4811         struct smb2_file_attr_tag_info *file_info;
4812
4813         if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4814                 pr_err("no right to read the attributes : 0x%x\n",
4815                        fp->daccess);
4816                 return -EACCES;
4817         }
4818
4819         file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4820         file_info->FileAttributes = fp->f_ci->m_fattr;
4821         file_info->ReparseTag = 0;
4822         rsp->OutputBufferLength =
4823                 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4824         return 0;
4825 }
4826
4827 static void find_file_posix_info(struct smb2_query_info_rsp *rsp,
4828                                 struct ksmbd_file *fp, void *rsp_org)
4829 {
4830         struct smb311_posix_qinfo *file_info;
4831         struct inode *inode = file_inode(fp->filp);
4832         struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4833         vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
4834         vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
4835         u64 time;
4836         int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
4837
4838         file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4839         file_info->CreationTime = cpu_to_le64(fp->create_time);
4840         time = ksmbd_UnixTimeToNT(inode->i_atime);
4841         file_info->LastAccessTime = cpu_to_le64(time);
4842         time = ksmbd_UnixTimeToNT(inode->i_mtime);
4843         file_info->LastWriteTime = cpu_to_le64(time);
4844         time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
4845         file_info->ChangeTime = cpu_to_le64(time);
4846         file_info->DosAttributes = fp->f_ci->m_fattr;
4847         file_info->Inode = cpu_to_le64(inode->i_ino);
4848         file_info->EndOfFile = cpu_to_le64(inode->i_size);
4849         file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4850         file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4851         file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
4852         file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4853
4854         /*
4855          * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4856          * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4857          *                sub_auth(4 * 1(num_subauth)) + RID(4).
4858          */
4859         id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
4860                   SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
4861         id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
4862                   SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
4863
4864         rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
4865 }
4866
4867 static int smb2_get_info_file(struct ksmbd_work *work,
4868                               struct smb2_query_info_req *req,
4869                               struct smb2_query_info_rsp *rsp)
4870 {
4871         struct ksmbd_file *fp;
4872         int fileinfoclass = 0;
4873         int rc = 0;
4874         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4875
4876         if (test_share_config_flag(work->tcon->share_conf,
4877                                    KSMBD_SHARE_FLAG_PIPE)) {
4878                 /* smb2 info file called for pipe */
4879                 return smb2_get_info_file_pipe(work->sess, req, rsp,
4880                                                work->response_buf);
4881         }
4882
4883         if (work->next_smb2_rcv_hdr_off) {
4884                 if (!has_file_id(req->VolatileFileId)) {
4885                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4886                                     work->compound_fid);
4887                         id = work->compound_fid;
4888                         pid = work->compound_pfid;
4889                 }
4890         }
4891
4892         if (!has_file_id(id)) {
4893                 id = req->VolatileFileId;
4894                 pid = req->PersistentFileId;
4895         }
4896
4897         fp = ksmbd_lookup_fd_slow(work, id, pid);
4898         if (!fp)
4899                 return -ENOENT;
4900
4901         fileinfoclass = req->FileInfoClass;
4902
4903         switch (fileinfoclass) {
4904         case FILE_ACCESS_INFORMATION:
4905                 get_file_access_info(rsp, fp, work->response_buf);
4906                 break;
4907
4908         case FILE_BASIC_INFORMATION:
4909                 rc = get_file_basic_info(rsp, fp, work->response_buf);
4910                 break;
4911
4912         case FILE_STANDARD_INFORMATION:
4913                 get_file_standard_info(rsp, fp, work->response_buf);
4914                 break;
4915
4916         case FILE_ALIGNMENT_INFORMATION:
4917                 get_file_alignment_info(rsp, work->response_buf);
4918                 break;
4919
4920         case FILE_ALL_INFORMATION:
4921                 rc = get_file_all_info(work, rsp, fp, work->response_buf);
4922                 break;
4923
4924         case FILE_ALTERNATE_NAME_INFORMATION:
4925                 get_file_alternate_info(work, rsp, fp, work->response_buf);
4926                 break;
4927
4928         case FILE_STREAM_INFORMATION:
4929                 get_file_stream_info(work, rsp, fp, work->response_buf);
4930                 break;
4931
4932         case FILE_INTERNAL_INFORMATION:
4933                 get_file_internal_info(rsp, fp, work->response_buf);
4934                 break;
4935
4936         case FILE_NETWORK_OPEN_INFORMATION:
4937                 rc = get_file_network_open_info(rsp, fp, work->response_buf);
4938                 break;
4939
4940         case FILE_EA_INFORMATION:
4941                 get_file_ea_info(rsp, work->response_buf);
4942                 break;
4943
4944         case FILE_FULL_EA_INFORMATION:
4945                 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4946                 break;
4947
4948         case FILE_POSITION_INFORMATION:
4949                 get_file_position_info(rsp, fp, work->response_buf);
4950                 break;
4951
4952         case FILE_MODE_INFORMATION:
4953                 get_file_mode_info(rsp, fp, work->response_buf);
4954                 break;
4955
4956         case FILE_COMPRESSION_INFORMATION:
4957                 get_file_compression_info(rsp, fp, work->response_buf);
4958                 break;
4959
4960         case FILE_ATTRIBUTE_TAG_INFORMATION:
4961                 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4962                 break;
4963         case SMB_FIND_FILE_POSIX_INFO:
4964                 if (!work->tcon->posix_extensions) {
4965                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4966                         rc = -EOPNOTSUPP;
4967                 } else {
4968                         find_file_posix_info(rsp, fp, work->response_buf);
4969                 }
4970                 break;
4971         default:
4972                 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4973                             fileinfoclass);
4974                 rc = -EOPNOTSUPP;
4975         }
4976         if (!rc)
4977                 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4978                                       rsp, work->response_buf);
4979         ksmbd_fd_put(work, fp);
4980         return rc;
4981 }
4982
4983 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4984                                     struct smb2_query_info_req *req,
4985                                     struct smb2_query_info_rsp *rsp)
4986 {
4987         struct ksmbd_session *sess = work->sess;
4988         struct ksmbd_conn *conn = work->conn;
4989         struct ksmbd_share_config *share = work->tcon->share_conf;
4990         int fsinfoclass = 0;
4991         struct kstatfs stfs;
4992         struct path path;
4993         int rc = 0, len;
4994
4995         if (!share->path)
4996                 return -EIO;
4997
4998         rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
4999         if (rc) {
5000                 pr_err("cannot create vfs path\n");
5001                 return -EIO;
5002         }
5003
5004         rc = vfs_statfs(&path, &stfs);
5005         if (rc) {
5006                 pr_err("cannot do stat of path %s\n", share->path);
5007                 path_put(&path);
5008                 return -EIO;
5009         }
5010
5011         fsinfoclass = req->FileInfoClass;
5012
5013         switch (fsinfoclass) {
5014         case FS_DEVICE_INFORMATION:
5015         {
5016                 struct filesystem_device_info *info;
5017
5018                 info = (struct filesystem_device_info *)rsp->Buffer;
5019
5020                 info->DeviceType = cpu_to_le32(stfs.f_type);
5021                 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
5022                 rsp->OutputBufferLength = cpu_to_le32(8);
5023                 break;
5024         }
5025         case FS_ATTRIBUTE_INFORMATION:
5026         {
5027                 struct filesystem_attribute_info *info;
5028                 size_t sz;
5029
5030                 info = (struct filesystem_attribute_info *)rsp->Buffer;
5031                 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5032                                                FILE_PERSISTENT_ACLS |
5033                                                FILE_UNICODE_ON_DISK |
5034                                                FILE_CASE_PRESERVED_NAMES |
5035                                                FILE_CASE_SENSITIVE_SEARCH |
5036                                                FILE_SUPPORTS_BLOCK_REFCOUNTING);
5037
5038                 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5039
5040                 if (test_share_config_flag(work->tcon->share_conf,
5041                     KSMBD_SHARE_FLAG_STREAMS))
5042                         info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5043
5044                 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5045                 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5046                                         "NTFS", PATH_MAX, conn->local_nls, 0);
5047                 len = len * 2;
5048                 info->FileSystemNameLen = cpu_to_le32(len);
5049                 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5050                 rsp->OutputBufferLength = cpu_to_le32(sz);
5051                 break;
5052         }
5053         case FS_VOLUME_INFORMATION:
5054         {
5055                 struct filesystem_vol_info *info;
5056                 size_t sz;
5057                 unsigned int serial_crc = 0;
5058
5059                 info = (struct filesystem_vol_info *)(rsp->Buffer);
5060                 info->VolumeCreationTime = 0;
5061                 serial_crc = crc32_le(serial_crc, share->name,
5062                                       strlen(share->name));
5063                 serial_crc = crc32_le(serial_crc, share->path,
5064                                       strlen(share->path));
5065                 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5066                                       strlen(ksmbd_netbios_name()));
5067                 /* Taking dummy value of serial number*/
5068                 info->SerialNumber = cpu_to_le32(serial_crc);
5069                 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5070                                         share->name, PATH_MAX,
5071                                         conn->local_nls, 0);
5072                 len = len * 2;
5073                 info->VolumeLabelSize = cpu_to_le32(len);
5074                 info->Reserved = 0;
5075                 sz = sizeof(struct filesystem_vol_info) - 2 + len;
5076                 rsp->OutputBufferLength = cpu_to_le32(sz);
5077                 break;
5078         }
5079         case FS_SIZE_INFORMATION:
5080         {
5081                 struct filesystem_info *info;
5082
5083                 info = (struct filesystem_info *)(rsp->Buffer);
5084                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5085                 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5086                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5087                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5088                 rsp->OutputBufferLength = cpu_to_le32(24);
5089                 break;
5090         }
5091         case FS_FULL_SIZE_INFORMATION:
5092         {
5093                 struct smb2_fs_full_size_info *info;
5094
5095                 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5096                 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5097                 info->CallerAvailableAllocationUnits =
5098                                         cpu_to_le64(stfs.f_bavail);
5099                 info->ActualAvailableAllocationUnits =
5100                                         cpu_to_le64(stfs.f_bfree);
5101                 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5102                 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5103                 rsp->OutputBufferLength = cpu_to_le32(32);
5104                 break;
5105         }
5106         case FS_OBJECT_ID_INFORMATION:
5107         {
5108                 struct object_id_info *info;
5109
5110                 info = (struct object_id_info *)(rsp->Buffer);
5111
5112                 if (!user_guest(sess->user))
5113                         memcpy(info->objid, user_passkey(sess->user), 16);
5114                 else
5115                         memset(info->objid, 0, 16);
5116
5117                 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5118                 info->extended_info.version = cpu_to_le32(1);
5119                 info->extended_info.release = cpu_to_le32(1);
5120                 info->extended_info.rel_date = 0;
5121                 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5122                 rsp->OutputBufferLength = cpu_to_le32(64);
5123                 break;
5124         }
5125         case FS_SECTOR_SIZE_INFORMATION:
5126         {
5127                 struct smb3_fs_ss_info *info;
5128                 unsigned int sector_size =
5129                         min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5130
5131                 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5132
5133                 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5134                 info->PhysicalBytesPerSectorForAtomicity =
5135                                 cpu_to_le32(sector_size);
5136                 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5137                 info->FSEffPhysicalBytesPerSectorForAtomicity =
5138                                 cpu_to_le32(sector_size);
5139                 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5140                                     SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5141                 info->ByteOffsetForSectorAlignment = 0;
5142                 info->ByteOffsetForPartitionAlignment = 0;
5143                 rsp->OutputBufferLength = cpu_to_le32(28);
5144                 break;
5145         }
5146         case FS_CONTROL_INFORMATION:
5147         {
5148                 /*
5149                  * TODO : The current implementation is based on
5150                  * test result with win7(NTFS) server. It's need to
5151                  * modify this to get valid Quota values
5152                  * from Linux kernel
5153                  */
5154                 struct smb2_fs_control_info *info;
5155
5156                 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5157                 info->FreeSpaceStartFiltering = 0;
5158                 info->FreeSpaceThreshold = 0;
5159                 info->FreeSpaceStopFiltering = 0;
5160                 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5161                 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5162                 info->Padding = 0;
5163                 rsp->OutputBufferLength = cpu_to_le32(48);
5164                 break;
5165         }
5166         case FS_POSIX_INFORMATION:
5167         {
5168                 struct filesystem_posix_info *info;
5169
5170                 if (!work->tcon->posix_extensions) {
5171                         pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5172                         rc = -EOPNOTSUPP;
5173                 } else {
5174                         info = (struct filesystem_posix_info *)(rsp->Buffer);
5175                         info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5176                         info->BlockSize = cpu_to_le32(stfs.f_bsize);
5177                         info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5178                         info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5179                         info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5180                         info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5181                         info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5182                         rsp->OutputBufferLength = cpu_to_le32(56);
5183                 }
5184                 break;
5185         }
5186         default:
5187                 path_put(&path);
5188                 return -EOPNOTSUPP;
5189         }
5190         rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5191                               rsp, work->response_buf);
5192         path_put(&path);
5193         return rc;
5194 }
5195
5196 static int smb2_get_info_sec(struct ksmbd_work *work,
5197                              struct smb2_query_info_req *req,
5198                              struct smb2_query_info_rsp *rsp)
5199 {
5200         struct ksmbd_file *fp;
5201         struct mnt_idmap *idmap;
5202         struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5203         struct smb_fattr fattr = {{0}};
5204         struct inode *inode;
5205         __u32 secdesclen = 0;
5206         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5207         int addition_info = le32_to_cpu(req->AdditionalInformation);
5208         int rc = 0, ppntsd_size = 0;
5209
5210         if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5211                               PROTECTED_DACL_SECINFO |
5212                               UNPROTECTED_DACL_SECINFO)) {
5213                 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5214                        addition_info);
5215
5216                 pntsd->revision = cpu_to_le16(1);
5217                 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5218                 pntsd->osidoffset = 0;
5219                 pntsd->gsidoffset = 0;
5220                 pntsd->sacloffset = 0;
5221                 pntsd->dacloffset = 0;
5222
5223                 secdesclen = sizeof(struct smb_ntsd);
5224                 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5225
5226                 return 0;
5227         }
5228
5229         if (work->next_smb2_rcv_hdr_off) {
5230                 if (!has_file_id(req->VolatileFileId)) {
5231                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5232                                     work->compound_fid);
5233                         id = work->compound_fid;
5234                         pid = work->compound_pfid;
5235                 }
5236         }
5237
5238         if (!has_file_id(id)) {
5239                 id = req->VolatileFileId;
5240                 pid = req->PersistentFileId;
5241         }
5242
5243         fp = ksmbd_lookup_fd_slow(work, id, pid);
5244         if (!fp)
5245                 return -ENOENT;
5246
5247         idmap = file_mnt_idmap(fp->filp);
5248         inode = file_inode(fp->filp);
5249         ksmbd_acls_fattr(&fattr, idmap, inode);
5250
5251         if (test_share_config_flag(work->tcon->share_conf,
5252                                    KSMBD_SHARE_FLAG_ACL_XATTR))
5253                 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5254                                                      fp->filp->f_path.dentry,
5255                                                      &ppntsd);
5256
5257         /* Check if sd buffer size exceeds response buffer size */
5258         if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5259                 rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5260                                     addition_info, &secdesclen, &fattr);
5261         posix_acl_release(fattr.cf_acls);
5262         posix_acl_release(fattr.cf_dacls);
5263         kfree(ppntsd);
5264         ksmbd_fd_put(work, fp);
5265         if (rc)
5266                 return rc;
5267
5268         rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5269         return 0;
5270 }
5271
5272 /**
5273  * smb2_query_info() - handler for smb2 query info command
5274  * @work:       smb work containing query info request buffer
5275  *
5276  * Return:      0 on success, otherwise error
5277  */
5278 int smb2_query_info(struct ksmbd_work *work)
5279 {
5280         struct smb2_query_info_req *req;
5281         struct smb2_query_info_rsp *rsp;
5282         int rc = 0;
5283
5284         WORK_BUFFERS(work, req, rsp);
5285
5286         ksmbd_debug(SMB, "GOT query info request\n");
5287
5288         switch (req->InfoType) {
5289         case SMB2_O_INFO_FILE:
5290                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5291                 rc = smb2_get_info_file(work, req, rsp);
5292                 break;
5293         case SMB2_O_INFO_FILESYSTEM:
5294                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5295                 rc = smb2_get_info_filesystem(work, req, rsp);
5296                 break;
5297         case SMB2_O_INFO_SECURITY:
5298                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5299                 rc = smb2_get_info_sec(work, req, rsp);
5300                 break;
5301         default:
5302                 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5303                             req->InfoType);
5304                 rc = -EOPNOTSUPP;
5305         }
5306
5307         if (!rc) {
5308                 rsp->StructureSize = cpu_to_le16(9);
5309                 rsp->OutputBufferOffset = cpu_to_le16(72);
5310                 rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5311                                        offsetof(struct smb2_query_info_rsp, Buffer) +
5312                                         le32_to_cpu(rsp->OutputBufferLength));
5313         }
5314
5315         if (rc < 0) {
5316                 if (rc == -EACCES)
5317                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
5318                 else if (rc == -ENOENT)
5319                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5320                 else if (rc == -EIO)
5321                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5322                 else if (rc == -ENOMEM)
5323                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5324                 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5325                         rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5326                 smb2_set_err_rsp(work);
5327
5328                 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5329                             rc);
5330                 return rc;
5331         }
5332         return 0;
5333 }
5334
5335 /**
5336  * smb2_close_pipe() - handler for closing IPC pipe
5337  * @work:       smb work containing close request buffer
5338  *
5339  * Return:      0
5340  */
5341 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5342 {
5343         u64 id;
5344         struct smb2_close_req *req;
5345         struct smb2_close_rsp *rsp;
5346
5347         WORK_BUFFERS(work, req, rsp);
5348
5349         id = req->VolatileFileId;
5350         ksmbd_session_rpc_close(work->sess, id);
5351
5352         rsp->StructureSize = cpu_to_le16(60);
5353         rsp->Flags = 0;
5354         rsp->Reserved = 0;
5355         rsp->CreationTime = 0;
5356         rsp->LastAccessTime = 0;
5357         rsp->LastWriteTime = 0;
5358         rsp->ChangeTime = 0;
5359         rsp->AllocationSize = 0;
5360         rsp->EndOfFile = 0;
5361         rsp->Attributes = 0;
5362
5363         return ksmbd_iov_pin_rsp(work, (void *)rsp,
5364                                  sizeof(struct smb2_close_rsp));
5365 }
5366
5367 /**
5368  * smb2_close() - handler for smb2 close file command
5369  * @work:       smb work containing close request buffer
5370  *
5371  * Return:      0
5372  */
5373 int smb2_close(struct ksmbd_work *work)
5374 {
5375         u64 volatile_id = KSMBD_NO_FID;
5376         u64 sess_id;
5377         struct smb2_close_req *req;
5378         struct smb2_close_rsp *rsp;
5379         struct ksmbd_conn *conn = work->conn;
5380         struct ksmbd_file *fp;
5381         struct inode *inode;
5382         u64 time;
5383         int err = 0;
5384
5385         WORK_BUFFERS(work, req, rsp);
5386
5387         if (test_share_config_flag(work->tcon->share_conf,
5388                                    KSMBD_SHARE_FLAG_PIPE)) {
5389                 ksmbd_debug(SMB, "IPC pipe close request\n");
5390                 return smb2_close_pipe(work);
5391         }
5392
5393         sess_id = le64_to_cpu(req->hdr.SessionId);
5394         if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5395                 sess_id = work->compound_sid;
5396
5397         work->compound_sid = 0;
5398         if (check_session_id(conn, sess_id)) {
5399                 work->compound_sid = sess_id;
5400         } else {
5401                 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5402                 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5403                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5404                 err = -EBADF;
5405                 goto out;
5406         }
5407
5408         if (work->next_smb2_rcv_hdr_off &&
5409             !has_file_id(req->VolatileFileId)) {
5410                 if (!has_file_id(work->compound_fid)) {
5411                         /* file already closed, return FILE_CLOSED */
5412                         ksmbd_debug(SMB, "file already closed\n");
5413                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5414                         err = -EBADF;
5415                         goto out;
5416                 } else {
5417                         ksmbd_debug(SMB,
5418                                     "Compound request set FID = %llu:%llu\n",
5419                                     work->compound_fid,
5420                                     work->compound_pfid);
5421                         volatile_id = work->compound_fid;
5422
5423                         /* file closed, stored id is not valid anymore */
5424                         work->compound_fid = KSMBD_NO_FID;
5425                         work->compound_pfid = KSMBD_NO_FID;
5426                 }
5427         } else {
5428                 volatile_id = req->VolatileFileId;
5429         }
5430         ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5431
5432         rsp->StructureSize = cpu_to_le16(60);
5433         rsp->Reserved = 0;
5434
5435         if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5436                 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5437                 if (!fp) {
5438                         err = -ENOENT;
5439                         goto out;
5440                 }
5441
5442                 inode = file_inode(fp->filp);
5443                 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5444                 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5445                         cpu_to_le64(inode->i_blocks << 9);
5446                 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5447                 rsp->Attributes = fp->f_ci->m_fattr;
5448                 rsp->CreationTime = cpu_to_le64(fp->create_time);
5449                 time = ksmbd_UnixTimeToNT(inode->i_atime);
5450                 rsp->LastAccessTime = cpu_to_le64(time);
5451                 time = ksmbd_UnixTimeToNT(inode->i_mtime);
5452                 rsp->LastWriteTime = cpu_to_le64(time);
5453                 time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
5454                 rsp->ChangeTime = cpu_to_le64(time);
5455                 ksmbd_fd_put(work, fp);
5456         } else {
5457                 rsp->Flags = 0;
5458                 rsp->AllocationSize = 0;
5459                 rsp->EndOfFile = 0;
5460                 rsp->Attributes = 0;
5461                 rsp->CreationTime = 0;
5462                 rsp->LastAccessTime = 0;
5463                 rsp->LastWriteTime = 0;
5464                 rsp->ChangeTime = 0;
5465         }
5466
5467         err = ksmbd_close_fd(work, volatile_id);
5468 out:
5469         if (!err)
5470                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5471                                         sizeof(struct smb2_close_rsp));
5472
5473         if (err) {
5474                 if (rsp->hdr.Status == 0)
5475                         rsp->hdr.Status = STATUS_FILE_CLOSED;
5476                 smb2_set_err_rsp(work);
5477         }
5478
5479         return err;
5480 }
5481
5482 /**
5483  * smb2_echo() - handler for smb2 echo(ping) command
5484  * @work:       smb work containing echo request buffer
5485  *
5486  * Return:      0
5487  */
5488 int smb2_echo(struct ksmbd_work *work)
5489 {
5490         struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5491
5492         if (work->next_smb2_rcv_hdr_off)
5493                 rsp = ksmbd_resp_buf_next(work);
5494
5495         rsp->StructureSize = cpu_to_le16(4);
5496         rsp->Reserved = 0;
5497         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5498 }
5499
5500 static int smb2_rename(struct ksmbd_work *work,
5501                        struct ksmbd_file *fp,
5502                        struct smb2_file_rename_info *file_info,
5503                        struct nls_table *local_nls)
5504 {
5505         struct ksmbd_share_config *share = fp->tcon->share_conf;
5506         char *new_name = NULL;
5507         int rc, flags = 0;
5508
5509         ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5510         new_name = smb2_get_name(file_info->FileName,
5511                                  le32_to_cpu(file_info->FileNameLength),
5512                                  local_nls);
5513         if (IS_ERR(new_name))
5514                 return PTR_ERR(new_name);
5515
5516         if (strchr(new_name, ':')) {
5517                 int s_type;
5518                 char *xattr_stream_name, *stream_name = NULL;
5519                 size_t xattr_stream_size;
5520                 int len;
5521
5522                 rc = parse_stream_name(new_name, &stream_name, &s_type);
5523                 if (rc < 0)
5524                         goto out;
5525
5526                 len = strlen(new_name);
5527                 if (len > 0 && new_name[len - 1] != '/') {
5528                         pr_err("not allow base filename in rename\n");
5529                         rc = -ESHARE;
5530                         goto out;
5531                 }
5532
5533                 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5534                                                  &xattr_stream_name,
5535                                                  &xattr_stream_size,
5536                                                  s_type);
5537                 if (rc)
5538                         goto out;
5539
5540                 rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5541                                         &fp->filp->f_path,
5542                                         xattr_stream_name,
5543                                         NULL, 0, 0, true);
5544                 if (rc < 0) {
5545                         pr_err("failed to store stream name in xattr: %d\n",
5546                                rc);
5547                         rc = -EINVAL;
5548                         goto out;
5549                 }
5550
5551                 goto out;
5552         }
5553
5554         ksmbd_debug(SMB, "new name %s\n", new_name);
5555         if (ksmbd_share_veto_filename(share, new_name)) {
5556                 rc = -ENOENT;
5557                 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5558                 goto out;
5559         }
5560
5561         if (!file_info->ReplaceIfExists)
5562                 flags = RENAME_NOREPLACE;
5563
5564         rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5565 out:
5566         kfree(new_name);
5567         return rc;
5568 }
5569
5570 static int smb2_create_link(struct ksmbd_work *work,
5571                             struct ksmbd_share_config *share,
5572                             struct smb2_file_link_info *file_info,
5573                             unsigned int buf_len, struct file *filp,
5574                             struct nls_table *local_nls)
5575 {
5576         char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5577         struct path path, parent_path;
5578         bool file_present = false;
5579         int rc;
5580
5581         if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5582                         le32_to_cpu(file_info->FileNameLength))
5583                 return -EINVAL;
5584
5585         ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5586         pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5587         if (!pathname)
5588                 return -ENOMEM;
5589
5590         link_name = smb2_get_name(file_info->FileName,
5591                                   le32_to_cpu(file_info->FileNameLength),
5592                                   local_nls);
5593         if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5594                 rc = -EINVAL;
5595                 goto out;
5596         }
5597
5598         ksmbd_debug(SMB, "link name is %s\n", link_name);
5599         target_name = file_path(filp, pathname, PATH_MAX);
5600         if (IS_ERR(target_name)) {
5601                 rc = -EINVAL;
5602                 goto out;
5603         }
5604
5605         ksmbd_debug(SMB, "target name is %s\n", target_name);
5606         rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5607                                         &parent_path, &path, 0);
5608         if (rc) {
5609                 if (rc != -ENOENT)
5610                         goto out;
5611         } else
5612                 file_present = true;
5613
5614         if (file_info->ReplaceIfExists) {
5615                 if (file_present) {
5616                         rc = ksmbd_vfs_remove_file(work, &path);
5617                         if (rc) {
5618                                 rc = -EINVAL;
5619                                 ksmbd_debug(SMB, "cannot delete %s\n",
5620                                             link_name);
5621                                 goto out;
5622                         }
5623                 }
5624         } else {
5625                 if (file_present) {
5626                         rc = -EEXIST;
5627                         ksmbd_debug(SMB, "link already exists\n");
5628                         goto out;
5629                 }
5630         }
5631
5632         rc = ksmbd_vfs_link(work, target_name, link_name);
5633         if (rc)
5634                 rc = -EINVAL;
5635 out:
5636         if (file_present)
5637                 ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5638
5639         if (!IS_ERR(link_name))
5640                 kfree(link_name);
5641         kfree(pathname);
5642         return rc;
5643 }
5644
5645 static int set_file_basic_info(struct ksmbd_file *fp,
5646                                struct smb2_file_basic_info *file_info,
5647                                struct ksmbd_share_config *share)
5648 {
5649         struct iattr attrs;
5650         struct file *filp;
5651         struct inode *inode;
5652         struct mnt_idmap *idmap;
5653         int rc = 0;
5654
5655         if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5656                 return -EACCES;
5657
5658         attrs.ia_valid = 0;
5659         filp = fp->filp;
5660         inode = file_inode(filp);
5661         idmap = file_mnt_idmap(filp);
5662
5663         if (file_info->CreationTime)
5664                 fp->create_time = le64_to_cpu(file_info->CreationTime);
5665
5666         if (file_info->LastAccessTime) {
5667                 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5668                 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5669         }
5670
5671         attrs.ia_valid |= ATTR_CTIME;
5672         if (file_info->ChangeTime)
5673                 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5674         else
5675                 attrs.ia_ctime = inode_get_ctime(inode);
5676
5677         if (file_info->LastWriteTime) {
5678                 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5679                 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5680         }
5681
5682         if (file_info->Attributes) {
5683                 if (!S_ISDIR(inode->i_mode) &&
5684                     file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5685                         pr_err("can't change a file to a directory\n");
5686                         return -EINVAL;
5687                 }
5688
5689                 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5690                         fp->f_ci->m_fattr = file_info->Attributes |
5691                                 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5692         }
5693
5694         if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5695             (file_info->CreationTime || file_info->Attributes)) {
5696                 struct xattr_dos_attrib da = {0};
5697
5698                 da.version = 4;
5699                 da.itime = fp->itime;
5700                 da.create_time = fp->create_time;
5701                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5702                 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5703                         XATTR_DOSINFO_ITIME;
5704
5705                 rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
5706                                 true);
5707                 if (rc)
5708                         ksmbd_debug(SMB,
5709                                     "failed to restore file attribute in EA\n");
5710                 rc = 0;
5711         }
5712
5713         if (attrs.ia_valid) {
5714                 struct dentry *dentry = filp->f_path.dentry;
5715                 struct inode *inode = d_inode(dentry);
5716
5717                 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5718                         return -EACCES;
5719
5720                 inode_lock(inode);
5721                 inode_set_ctime_to_ts(inode, attrs.ia_ctime);
5722                 attrs.ia_valid &= ~ATTR_CTIME;
5723                 rc = notify_change(idmap, dentry, &attrs, NULL);
5724                 inode_unlock(inode);
5725         }
5726         return rc;
5727 }
5728
5729 static int set_file_allocation_info(struct ksmbd_work *work,
5730                                     struct ksmbd_file *fp,
5731                                     struct smb2_file_alloc_info *file_alloc_info)
5732 {
5733         /*
5734          * TODO : It's working fine only when store dos attributes
5735          * is not yes. need to implement a logic which works
5736          * properly with any smb.conf option
5737          */
5738
5739         loff_t alloc_blks;
5740         struct inode *inode;
5741         int rc;
5742
5743         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5744                 return -EACCES;
5745
5746         alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5747         inode = file_inode(fp->filp);
5748
5749         if (alloc_blks > inode->i_blocks) {
5750                 smb_break_all_levII_oplock(work, fp, 1);
5751                 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5752                                    alloc_blks * 512);
5753                 if (rc && rc != -EOPNOTSUPP) {
5754                         pr_err("vfs_fallocate is failed : %d\n", rc);
5755                         return rc;
5756                 }
5757         } else if (alloc_blks < inode->i_blocks) {
5758                 loff_t size;
5759
5760                 /*
5761                  * Allocation size could be smaller than original one
5762                  * which means allocated blocks in file should be
5763                  * deallocated. use truncate to cut out it, but inode
5764                  * size is also updated with truncate offset.
5765                  * inode size is retained by backup inode size.
5766                  */
5767                 size = i_size_read(inode);
5768                 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5769                 if (rc) {
5770                         pr_err("truncate failed!, err %d\n", rc);
5771                         return rc;
5772                 }
5773                 if (size < alloc_blks * 512)
5774                         i_size_write(inode, size);
5775         }
5776         return 0;
5777 }
5778
5779 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5780                                 struct smb2_file_eof_info *file_eof_info)
5781 {
5782         loff_t newsize;
5783         struct inode *inode;
5784         int rc;
5785
5786         if (!(fp->daccess & FILE_WRITE_DATA_LE))
5787                 return -EACCES;
5788
5789         newsize = le64_to_cpu(file_eof_info->EndOfFile);
5790         inode = file_inode(fp->filp);
5791
5792         /*
5793          * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5794          * on FAT32 shared device, truncate execution time is too long
5795          * and network error could cause from windows client. because
5796          * truncate of some filesystem like FAT32 fill zero data in
5797          * truncated range.
5798          */
5799         if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5800                 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
5801                 rc = ksmbd_vfs_truncate(work, fp, newsize);
5802                 if (rc) {
5803                         ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
5804                         if (rc != -EAGAIN)
5805                                 rc = -EBADF;
5806                         return rc;
5807                 }
5808         }
5809         return 0;
5810 }
5811
5812 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5813                            struct smb2_file_rename_info *rename_info,
5814                            unsigned int buf_len)
5815 {
5816         if (!(fp->daccess & FILE_DELETE_LE)) {
5817                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5818                 return -EACCES;
5819         }
5820
5821         if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5822                         le32_to_cpu(rename_info->FileNameLength))
5823                 return -EINVAL;
5824
5825         if (!le32_to_cpu(rename_info->FileNameLength))
5826                 return -EINVAL;
5827
5828         return smb2_rename(work, fp, rename_info, work->conn->local_nls);
5829 }
5830
5831 static int set_file_disposition_info(struct ksmbd_file *fp,
5832                                      struct smb2_file_disposition_info *file_info)
5833 {
5834         struct inode *inode;
5835
5836         if (!(fp->daccess & FILE_DELETE_LE)) {
5837                 pr_err("no right to delete : 0x%x\n", fp->daccess);
5838                 return -EACCES;
5839         }
5840
5841         inode = file_inode(fp->filp);
5842         if (file_info->DeletePending) {
5843                 if (S_ISDIR(inode->i_mode) &&
5844                     ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5845                         return -EBUSY;
5846                 ksmbd_set_inode_pending_delete(fp);
5847         } else {
5848                 ksmbd_clear_inode_pending_delete(fp);
5849         }
5850         return 0;
5851 }
5852
5853 static int set_file_position_info(struct ksmbd_file *fp,
5854                                   struct smb2_file_pos_info *file_info)
5855 {
5856         loff_t current_byte_offset;
5857         unsigned long sector_size;
5858         struct inode *inode;
5859
5860         inode = file_inode(fp->filp);
5861         current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5862         sector_size = inode->i_sb->s_blocksize;
5863
5864         if (current_byte_offset < 0 ||
5865             (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5866              current_byte_offset & (sector_size - 1))) {
5867                 pr_err("CurrentByteOffset is not valid : %llu\n",
5868                        current_byte_offset);
5869                 return -EINVAL;
5870         }
5871
5872         fp->filp->f_pos = current_byte_offset;
5873         return 0;
5874 }
5875
5876 static int set_file_mode_info(struct ksmbd_file *fp,
5877                               struct smb2_file_mode_info *file_info)
5878 {
5879         __le32 mode;
5880
5881         mode = file_info->Mode;
5882
5883         if ((mode & ~FILE_MODE_INFO_MASK)) {
5884                 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5885                 return -EINVAL;
5886         }
5887
5888         /*
5889          * TODO : need to implement consideration for
5890          * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5891          */
5892         ksmbd_vfs_set_fadvise(fp->filp, mode);
5893         fp->coption = mode;
5894         return 0;
5895 }
5896
5897 /**
5898  * smb2_set_info_file() - handler for smb2 set info command
5899  * @work:       smb work containing set info command buffer
5900  * @fp:         ksmbd_file pointer
5901  * @req:        request buffer pointer
5902  * @share:      ksmbd_share_config pointer
5903  *
5904  * Return:      0 on success, otherwise error
5905  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5906  */
5907 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5908                               struct smb2_set_info_req *req,
5909                               struct ksmbd_share_config *share)
5910 {
5911         unsigned int buf_len = le32_to_cpu(req->BufferLength);
5912
5913         switch (req->FileInfoClass) {
5914         case FILE_BASIC_INFORMATION:
5915         {
5916                 if (buf_len < sizeof(struct smb2_file_basic_info))
5917                         return -EINVAL;
5918
5919                 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5920         }
5921         case FILE_ALLOCATION_INFORMATION:
5922         {
5923                 if (buf_len < sizeof(struct smb2_file_alloc_info))
5924                         return -EINVAL;
5925
5926                 return set_file_allocation_info(work, fp,
5927                                                 (struct smb2_file_alloc_info *)req->Buffer);
5928         }
5929         case FILE_END_OF_FILE_INFORMATION:
5930         {
5931                 if (buf_len < sizeof(struct smb2_file_eof_info))
5932                         return -EINVAL;
5933
5934                 return set_end_of_file_info(work, fp,
5935                                             (struct smb2_file_eof_info *)req->Buffer);
5936         }
5937         case FILE_RENAME_INFORMATION:
5938         {
5939                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5940                         ksmbd_debug(SMB,
5941                                     "User does not have write permission\n");
5942                         return -EACCES;
5943                 }
5944
5945                 if (buf_len < sizeof(struct smb2_file_rename_info))
5946                         return -EINVAL;
5947
5948                 return set_rename_info(work, fp,
5949                                        (struct smb2_file_rename_info *)req->Buffer,
5950                                        buf_len);
5951         }
5952         case FILE_LINK_INFORMATION:
5953         {
5954                 if (buf_len < sizeof(struct smb2_file_link_info))
5955                         return -EINVAL;
5956
5957                 return smb2_create_link(work, work->tcon->share_conf,
5958                                         (struct smb2_file_link_info *)req->Buffer,
5959                                         buf_len, fp->filp,
5960                                         work->conn->local_nls);
5961         }
5962         case FILE_DISPOSITION_INFORMATION:
5963         {
5964                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5965                         ksmbd_debug(SMB,
5966                                     "User does not have write permission\n");
5967                         return -EACCES;
5968                 }
5969
5970                 if (buf_len < sizeof(struct smb2_file_disposition_info))
5971                         return -EINVAL;
5972
5973                 return set_file_disposition_info(fp,
5974                                                  (struct smb2_file_disposition_info *)req->Buffer);
5975         }
5976         case FILE_FULL_EA_INFORMATION:
5977         {
5978                 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5979                         pr_err("Not permitted to write ext  attr: 0x%x\n",
5980                                fp->daccess);
5981                         return -EACCES;
5982                 }
5983
5984                 if (buf_len < sizeof(struct smb2_ea_info))
5985                         return -EINVAL;
5986
5987                 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5988                                    buf_len, &fp->filp->f_path);
5989         }
5990         case FILE_POSITION_INFORMATION:
5991         {
5992                 if (buf_len < sizeof(struct smb2_file_pos_info))
5993                         return -EINVAL;
5994
5995                 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
5996         }
5997         case FILE_MODE_INFORMATION:
5998         {
5999                 if (buf_len < sizeof(struct smb2_file_mode_info))
6000                         return -EINVAL;
6001
6002                 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
6003         }
6004         }
6005
6006         pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6007         return -EOPNOTSUPP;
6008 }
6009
6010 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6011                              char *buffer, int buf_len)
6012 {
6013         struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6014
6015         fp->saccess |= FILE_SHARE_DELETE_LE;
6016
6017         return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6018                         buf_len, false, true);
6019 }
6020
6021 /**
6022  * smb2_set_info() - handler for smb2 set info command handler
6023  * @work:       smb work containing set info request buffer
6024  *
6025  * Return:      0 on success, otherwise error
6026  */
6027 int smb2_set_info(struct ksmbd_work *work)
6028 {
6029         struct smb2_set_info_req *req;
6030         struct smb2_set_info_rsp *rsp;
6031         struct ksmbd_file *fp;
6032         int rc = 0;
6033         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6034
6035         ksmbd_debug(SMB, "Received set info request\n");
6036
6037         if (work->next_smb2_rcv_hdr_off) {
6038                 req = ksmbd_req_buf_next(work);
6039                 rsp = ksmbd_resp_buf_next(work);
6040                 if (!has_file_id(req->VolatileFileId)) {
6041                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6042                                     work->compound_fid);
6043                         id = work->compound_fid;
6044                         pid = work->compound_pfid;
6045                 }
6046         } else {
6047                 req = smb2_get_msg(work->request_buf);
6048                 rsp = smb2_get_msg(work->response_buf);
6049         }
6050
6051         if (!has_file_id(id)) {
6052                 id = req->VolatileFileId;
6053                 pid = req->PersistentFileId;
6054         }
6055
6056         fp = ksmbd_lookup_fd_slow(work, id, pid);
6057         if (!fp) {
6058                 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6059                 rc = -ENOENT;
6060                 goto err_out;
6061         }
6062
6063         switch (req->InfoType) {
6064         case SMB2_O_INFO_FILE:
6065                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6066                 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6067                 break;
6068         case SMB2_O_INFO_SECURITY:
6069                 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6070                 if (ksmbd_override_fsids(work)) {
6071                         rc = -ENOMEM;
6072                         goto err_out;
6073                 }
6074                 rc = smb2_set_info_sec(fp,
6075                                        le32_to_cpu(req->AdditionalInformation),
6076                                        req->Buffer,
6077                                        le32_to_cpu(req->BufferLength));
6078                 ksmbd_revert_fsids(work);
6079                 break;
6080         default:
6081                 rc = -EOPNOTSUPP;
6082         }
6083
6084         if (rc < 0)
6085                 goto err_out;
6086
6087         rsp->StructureSize = cpu_to_le16(2);
6088         rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6089                                sizeof(struct smb2_set_info_rsp));
6090         if (rc)
6091                 goto err_out;
6092         ksmbd_fd_put(work, fp);
6093         return 0;
6094
6095 err_out:
6096         if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6097                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6098         else if (rc == -EINVAL)
6099                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6100         else if (rc == -ESHARE)
6101                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6102         else if (rc == -ENOENT)
6103                 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6104         else if (rc == -EBUSY || rc == -ENOTEMPTY)
6105                 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6106         else if (rc == -EAGAIN)
6107                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6108         else if (rc == -EBADF || rc == -ESTALE)
6109                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6110         else if (rc == -EEXIST)
6111                 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6112         else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6113                 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6114         smb2_set_err_rsp(work);
6115         ksmbd_fd_put(work, fp);
6116         ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6117         return rc;
6118 }
6119
6120 /**
6121  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6122  * @work:       smb work containing read IPC pipe command buffer
6123  *
6124  * Return:      0 on success, otherwise error
6125  */
6126 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6127 {
6128         int nbytes = 0, err;
6129         u64 id;
6130         struct ksmbd_rpc_command *rpc_resp;
6131         struct smb2_read_req *req;
6132         struct smb2_read_rsp *rsp;
6133
6134         WORK_BUFFERS(work, req, rsp);
6135
6136         id = req->VolatileFileId;
6137
6138         rpc_resp = ksmbd_rpc_read(work->sess, id);
6139         if (rpc_resp) {
6140                 void *aux_payload_buf;
6141
6142                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6143                         err = -EINVAL;
6144                         goto out;
6145                 }
6146
6147                 aux_payload_buf =
6148                         kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6149                 if (!aux_payload_buf) {
6150                         err = -ENOMEM;
6151                         goto out;
6152                 }
6153
6154                 memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6155
6156                 nbytes = rpc_resp->payload_sz;
6157                 err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6158                                              offsetof(struct smb2_read_rsp, Buffer),
6159                                              aux_payload_buf, nbytes);
6160                 if (err)
6161                         goto out;
6162                 kvfree(rpc_resp);
6163         } else {
6164                 err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6165                                         offsetof(struct smb2_read_rsp, Buffer));
6166                 if (err)
6167                         goto out;
6168         }
6169
6170         rsp->StructureSize = cpu_to_le16(17);
6171         rsp->DataOffset = 80;
6172         rsp->Reserved = 0;
6173         rsp->DataLength = cpu_to_le32(nbytes);
6174         rsp->DataRemaining = 0;
6175         rsp->Flags = 0;
6176         return 0;
6177
6178 out:
6179         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6180         smb2_set_err_rsp(work);
6181         kvfree(rpc_resp);
6182         return err;
6183 }
6184
6185 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6186                                         struct smb2_buffer_desc_v1 *desc,
6187                                         __le32 Channel,
6188                                         __le16 ChannelInfoLength)
6189 {
6190         unsigned int i, ch_count;
6191
6192         if (work->conn->dialect == SMB30_PROT_ID &&
6193             Channel != SMB2_CHANNEL_RDMA_V1)
6194                 return -EINVAL;
6195
6196         ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6197         if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6198                 for (i = 0; i < ch_count; i++) {
6199                         pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6200                                 i,
6201                                 le32_to_cpu(desc[i].token),
6202                                 le32_to_cpu(desc[i].length));
6203                 }
6204         }
6205         if (!ch_count)
6206                 return -EINVAL;
6207
6208         work->need_invalidate_rkey =
6209                 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6210         if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6211                 work->remote_key = le32_to_cpu(desc->token);
6212         return 0;
6213 }
6214
6215 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6216                                       struct smb2_read_req *req, void *data_buf,
6217                                       size_t length)
6218 {
6219         int err;
6220
6221         err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6222                                     (struct smb2_buffer_desc_v1 *)
6223                                     ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6224                                     le16_to_cpu(req->ReadChannelInfoLength));
6225         if (err)
6226                 return err;
6227
6228         return length;
6229 }
6230
6231 /**
6232  * smb2_read() - handler for smb2 read from file
6233  * @work:       smb work containing read command buffer
6234  *
6235  * Return:      0 on success, otherwise error
6236  */
6237 int smb2_read(struct ksmbd_work *work)
6238 {
6239         struct ksmbd_conn *conn = work->conn;
6240         struct smb2_read_req *req;
6241         struct smb2_read_rsp *rsp;
6242         struct ksmbd_file *fp = NULL;
6243         loff_t offset;
6244         size_t length, mincount;
6245         ssize_t nbytes = 0, remain_bytes = 0;
6246         int err = 0;
6247         bool is_rdma_channel = false;
6248         unsigned int max_read_size = conn->vals->max_read_size;
6249         unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6250         void *aux_payload_buf;
6251
6252         if (test_share_config_flag(work->tcon->share_conf,
6253                                    KSMBD_SHARE_FLAG_PIPE)) {
6254                 ksmbd_debug(SMB, "IPC pipe read request\n");
6255                 return smb2_read_pipe(work);
6256         }
6257
6258         if (work->next_smb2_rcv_hdr_off) {
6259                 req = ksmbd_req_buf_next(work);
6260                 rsp = ksmbd_resp_buf_next(work);
6261                 if (!has_file_id(req->VolatileFileId)) {
6262                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6263                                         work->compound_fid);
6264                         id = work->compound_fid;
6265                         pid = work->compound_pfid;
6266                 }
6267         } else {
6268                 req = smb2_get_msg(work->request_buf);
6269                 rsp = smb2_get_msg(work->response_buf);
6270         }
6271
6272         if (!has_file_id(id)) {
6273                 id = req->VolatileFileId;
6274                 pid = req->PersistentFileId;
6275         }
6276
6277         if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6278             req->Channel == SMB2_CHANNEL_RDMA_V1) {
6279                 is_rdma_channel = true;
6280                 max_read_size = get_smbd_max_read_write_size();
6281         }
6282
6283         if (is_rdma_channel == true) {
6284                 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6285
6286                 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6287                         err = -EINVAL;
6288                         goto out;
6289                 }
6290                 err = smb2_set_remote_key_for_rdma(work,
6291                                                    (struct smb2_buffer_desc_v1 *)
6292                                                    ((char *)req + ch_offset),
6293                                                    req->Channel,
6294                                                    req->ReadChannelInfoLength);
6295                 if (err)
6296                         goto out;
6297         }
6298
6299         fp = ksmbd_lookup_fd_slow(work, id, pid);
6300         if (!fp) {
6301                 err = -ENOENT;
6302                 goto out;
6303         }
6304
6305         if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6306                 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6307                 err = -EACCES;
6308                 goto out;
6309         }
6310
6311         offset = le64_to_cpu(req->Offset);
6312         length = le32_to_cpu(req->Length);
6313         mincount = le32_to_cpu(req->MinimumCount);
6314
6315         if (length > max_read_size) {
6316                 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6317                             max_read_size);
6318                 err = -EINVAL;
6319                 goto out;
6320         }
6321
6322         ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6323                     fp->filp, offset, length);
6324
6325         aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6326         if (!aux_payload_buf) {
6327                 err = -ENOMEM;
6328                 goto out;
6329         }
6330
6331         nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6332         if (nbytes < 0) {
6333                 err = nbytes;
6334                 goto out;
6335         }
6336
6337         if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6338                 kvfree(aux_payload_buf);
6339                 rsp->hdr.Status = STATUS_END_OF_FILE;
6340                 smb2_set_err_rsp(work);
6341                 ksmbd_fd_put(work, fp);
6342                 return 0;
6343         }
6344
6345         ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6346                     nbytes, offset, mincount);
6347
6348         if (is_rdma_channel == true) {
6349                 /* write data to the client using rdma channel */
6350                 remain_bytes = smb2_read_rdma_channel(work, req,
6351                                                       aux_payload_buf,
6352                                                       nbytes);
6353                 kvfree(aux_payload_buf);
6354                 aux_payload_buf = NULL;
6355                 nbytes = 0;
6356                 if (remain_bytes < 0) {
6357                         err = (int)remain_bytes;
6358                         goto out;
6359                 }
6360         }
6361
6362         rsp->StructureSize = cpu_to_le16(17);
6363         rsp->DataOffset = 80;
6364         rsp->Reserved = 0;
6365         rsp->DataLength = cpu_to_le32(nbytes);
6366         rsp->DataRemaining = cpu_to_le32(remain_bytes);
6367         rsp->Flags = 0;
6368         err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6369                                      offsetof(struct smb2_read_rsp, Buffer),
6370                                      aux_payload_buf, nbytes);
6371         if (err)
6372                 goto out;
6373         ksmbd_fd_put(work, fp);
6374         return 0;
6375
6376 out:
6377         if (err) {
6378                 if (err == -EISDIR)
6379                         rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6380                 else if (err == -EAGAIN)
6381                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6382                 else if (err == -ENOENT)
6383                         rsp->hdr.Status = STATUS_FILE_CLOSED;
6384                 else if (err == -EACCES)
6385                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
6386                 else if (err == -ESHARE)
6387                         rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6388                 else if (err == -EINVAL)
6389                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6390                 else
6391                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6392
6393                 smb2_set_err_rsp(work);
6394         }
6395         ksmbd_fd_put(work, fp);
6396         return err;
6397 }
6398
6399 /**
6400  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6401  * @work:       smb work containing write IPC pipe command buffer
6402  *
6403  * Return:      0 on success, otherwise error
6404  */
6405 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6406 {
6407         struct smb2_write_req *req;
6408         struct smb2_write_rsp *rsp;
6409         struct ksmbd_rpc_command *rpc_resp;
6410         u64 id = 0;
6411         int err = 0, ret = 0;
6412         char *data_buf;
6413         size_t length;
6414
6415         WORK_BUFFERS(work, req, rsp);
6416
6417         length = le32_to_cpu(req->Length);
6418         id = req->VolatileFileId;
6419
6420         if ((u64)le16_to_cpu(req->DataOffset) + length >
6421             get_rfc1002_len(work->request_buf)) {
6422                 pr_err("invalid write data offset %u, smb_len %u\n",
6423                        le16_to_cpu(req->DataOffset),
6424                        get_rfc1002_len(work->request_buf));
6425                 err = -EINVAL;
6426                 goto out;
6427         }
6428
6429         data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6430                            le16_to_cpu(req->DataOffset));
6431
6432         rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6433         if (rpc_resp) {
6434                 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6435                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6436                         kvfree(rpc_resp);
6437                         smb2_set_err_rsp(work);
6438                         return -EOPNOTSUPP;
6439                 }
6440                 if (rpc_resp->flags != KSMBD_RPC_OK) {
6441                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6442                         smb2_set_err_rsp(work);
6443                         kvfree(rpc_resp);
6444                         return ret;
6445                 }
6446                 kvfree(rpc_resp);
6447         }
6448
6449         rsp->StructureSize = cpu_to_le16(17);
6450         rsp->DataOffset = 0;
6451         rsp->Reserved = 0;
6452         rsp->DataLength = cpu_to_le32(length);
6453         rsp->DataRemaining = 0;
6454         rsp->Reserved2 = 0;
6455         err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6456                                 offsetof(struct smb2_write_rsp, Buffer));
6457 out:
6458         if (err) {
6459                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6460                 smb2_set_err_rsp(work);
6461         }
6462
6463         return err;
6464 }
6465
6466 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6467                                        struct smb2_write_req *req,
6468                                        struct ksmbd_file *fp,
6469                                        loff_t offset, size_t length, bool sync)
6470 {
6471         char *data_buf;
6472         int ret;
6473         ssize_t nbytes;
6474
6475         data_buf = kvzalloc(length, GFP_KERNEL);
6476         if (!data_buf)
6477                 return -ENOMEM;
6478
6479         ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6480                                    (struct smb2_buffer_desc_v1 *)
6481                                    ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6482                                    le16_to_cpu(req->WriteChannelInfoLength));
6483         if (ret < 0) {
6484                 kvfree(data_buf);
6485                 return ret;
6486         }
6487
6488         ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6489         kvfree(data_buf);
6490         if (ret < 0)
6491                 return ret;
6492
6493         return nbytes;
6494 }
6495
6496 /**
6497  * smb2_write() - handler for smb2 write from file
6498  * @work:       smb work containing write command buffer
6499  *
6500  * Return:      0 on success, otherwise error
6501  */
6502 int smb2_write(struct ksmbd_work *work)
6503 {
6504         struct smb2_write_req *req;
6505         struct smb2_write_rsp *rsp;
6506         struct ksmbd_file *fp = NULL;
6507         loff_t offset;
6508         size_t length;
6509         ssize_t nbytes;
6510         char *data_buf;
6511         bool writethrough = false, is_rdma_channel = false;
6512         int err = 0;
6513         unsigned int max_write_size = work->conn->vals->max_write_size;
6514
6515         WORK_BUFFERS(work, req, rsp);
6516
6517         if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6518                 ksmbd_debug(SMB, "IPC pipe write request\n");
6519                 return smb2_write_pipe(work);
6520         }
6521
6522         offset = le64_to_cpu(req->Offset);
6523         length = le32_to_cpu(req->Length);
6524
6525         if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6526             req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6527                 is_rdma_channel = true;
6528                 max_write_size = get_smbd_max_read_write_size();
6529                 length = le32_to_cpu(req->RemainingBytes);
6530         }
6531
6532         if (is_rdma_channel == true) {
6533                 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6534
6535                 if (req->Length != 0 || req->DataOffset != 0 ||
6536                     ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6537                         err = -EINVAL;
6538                         goto out;
6539                 }
6540                 err = smb2_set_remote_key_for_rdma(work,
6541                                                    (struct smb2_buffer_desc_v1 *)
6542                                                    ((char *)req + ch_offset),
6543                                                    req->Channel,
6544                                                    req->WriteChannelInfoLength);
6545                 if (err)
6546                         goto out;
6547         }
6548
6549         if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6550                 ksmbd_debug(SMB, "User does not have write permission\n");
6551                 err = -EACCES;
6552                 goto out;
6553         }
6554
6555         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6556         if (!fp) {
6557                 err = -ENOENT;
6558                 goto out;
6559         }
6560
6561         if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6562                 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6563                 err = -EACCES;
6564                 goto out;
6565         }
6566
6567         if (length > max_write_size) {
6568                 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6569                             max_write_size);
6570                 err = -EINVAL;
6571                 goto out;
6572         }
6573
6574         ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6575         if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6576                 writethrough = true;
6577
6578         if (is_rdma_channel == false) {
6579                 if (le16_to_cpu(req->DataOffset) <
6580                     offsetof(struct smb2_write_req, Buffer)) {
6581                         err = -EINVAL;
6582                         goto out;
6583                 }
6584
6585                 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6586                                     le16_to_cpu(req->DataOffset));
6587
6588                 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6589                             fp->filp, offset, length);
6590                 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6591                                       writethrough, &nbytes);
6592                 if (err < 0)
6593                         goto out;
6594         } else {
6595                 /* read data from the client using rdma channel, and
6596                  * write the data.
6597                  */
6598                 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6599                                                  writethrough);
6600                 if (nbytes < 0) {
6601                         err = (int)nbytes;
6602                         goto out;
6603                 }
6604         }
6605
6606         rsp->StructureSize = cpu_to_le16(17);
6607         rsp->DataOffset = 0;
6608         rsp->Reserved = 0;
6609         rsp->DataLength = cpu_to_le32(nbytes);
6610         rsp->DataRemaining = 0;
6611         rsp->Reserved2 = 0;
6612         err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6613         if (err)
6614                 goto out;
6615         ksmbd_fd_put(work, fp);
6616         return 0;
6617
6618 out:
6619         if (err == -EAGAIN)
6620                 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6621         else if (err == -ENOSPC || err == -EFBIG)
6622                 rsp->hdr.Status = STATUS_DISK_FULL;
6623         else if (err == -ENOENT)
6624                 rsp->hdr.Status = STATUS_FILE_CLOSED;
6625         else if (err == -EACCES)
6626                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6627         else if (err == -ESHARE)
6628                 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6629         else if (err == -EINVAL)
6630                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6631         else
6632                 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6633
6634         smb2_set_err_rsp(work);
6635         ksmbd_fd_put(work, fp);
6636         return err;
6637 }
6638
6639 /**
6640  * smb2_flush() - handler for smb2 flush file - fsync
6641  * @work:       smb work containing flush command buffer
6642  *
6643  * Return:      0 on success, otherwise error
6644  */
6645 int smb2_flush(struct ksmbd_work *work)
6646 {
6647         struct smb2_flush_req *req;
6648         struct smb2_flush_rsp *rsp;
6649         int err;
6650
6651         WORK_BUFFERS(work, req, rsp);
6652
6653         ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6654
6655         err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6656         if (err)
6657                 goto out;
6658
6659         rsp->StructureSize = cpu_to_le16(4);
6660         rsp->Reserved = 0;
6661         return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
6662
6663 out:
6664         rsp->hdr.Status = STATUS_INVALID_HANDLE;
6665         smb2_set_err_rsp(work);
6666         return err;
6667 }
6668
6669 /**
6670  * smb2_cancel() - handler for smb2 cancel command
6671  * @work:       smb work containing cancel command buffer
6672  *
6673  * Return:      0 on success, otherwise error
6674  */
6675 int smb2_cancel(struct ksmbd_work *work)
6676 {
6677         struct ksmbd_conn *conn = work->conn;
6678         struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6679         struct smb2_hdr *chdr;
6680         struct ksmbd_work *iter;
6681         struct list_head *command_list;
6682
6683         if (work->next_smb2_rcv_hdr_off)
6684                 hdr = ksmbd_resp_buf_next(work);
6685
6686         ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6687                     hdr->MessageId, hdr->Flags);
6688
6689         if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6690                 command_list = &conn->async_requests;
6691
6692                 spin_lock(&conn->request_lock);
6693                 list_for_each_entry(iter, command_list,
6694                                     async_request_entry) {
6695                         chdr = smb2_get_msg(iter->request_buf);
6696
6697                         if (iter->async_id !=
6698                             le64_to_cpu(hdr->Id.AsyncId))
6699                                 continue;
6700
6701                         ksmbd_debug(SMB,
6702                                     "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6703                                     le64_to_cpu(hdr->Id.AsyncId),
6704                                     le16_to_cpu(chdr->Command));
6705                         iter->state = KSMBD_WORK_CANCELLED;
6706                         if (iter->cancel_fn)
6707                                 iter->cancel_fn(iter->cancel_argv);
6708                         break;
6709                 }
6710                 spin_unlock(&conn->request_lock);
6711         } else {
6712                 command_list = &conn->requests;
6713
6714                 spin_lock(&conn->request_lock);
6715                 list_for_each_entry(iter, command_list, request_entry) {
6716                         chdr = smb2_get_msg(iter->request_buf);
6717
6718                         if (chdr->MessageId != hdr->MessageId ||
6719                             iter == work)
6720                                 continue;
6721
6722                         ksmbd_debug(SMB,
6723                                     "smb2 with mid %llu cancelled command = 0x%x\n",
6724                                     le64_to_cpu(hdr->MessageId),
6725                                     le16_to_cpu(chdr->Command));
6726                         iter->state = KSMBD_WORK_CANCELLED;
6727                         break;
6728                 }
6729                 spin_unlock(&conn->request_lock);
6730         }
6731
6732         /* For SMB2_CANCEL command itself send no response*/
6733         work->send_no_response = 1;
6734         return 0;
6735 }
6736
6737 struct file_lock *smb_flock_init(struct file *f)
6738 {
6739         struct file_lock *fl;
6740
6741         fl = locks_alloc_lock();
6742         if (!fl)
6743                 goto out;
6744
6745         locks_init_lock(fl);
6746
6747         fl->fl_owner = f;
6748         fl->fl_pid = current->tgid;
6749         fl->fl_file = f;
6750         fl->fl_flags = FL_POSIX;
6751         fl->fl_ops = NULL;
6752         fl->fl_lmops = NULL;
6753
6754 out:
6755         return fl;
6756 }
6757
6758 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6759 {
6760         int cmd = -EINVAL;
6761
6762         /* Checking for wrong flag combination during lock request*/
6763         switch (flags) {
6764         case SMB2_LOCKFLAG_SHARED:
6765                 ksmbd_debug(SMB, "received shared request\n");
6766                 cmd = F_SETLKW;
6767                 flock->fl_type = F_RDLCK;
6768                 flock->fl_flags |= FL_SLEEP;
6769                 break;
6770         case SMB2_LOCKFLAG_EXCLUSIVE:
6771                 ksmbd_debug(SMB, "received exclusive request\n");
6772                 cmd = F_SETLKW;
6773                 flock->fl_type = F_WRLCK;
6774                 flock->fl_flags |= FL_SLEEP;
6775                 break;
6776         case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6777                 ksmbd_debug(SMB,
6778                             "received shared & fail immediately request\n");
6779                 cmd = F_SETLK;
6780                 flock->fl_type = F_RDLCK;
6781                 break;
6782         case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6783                 ksmbd_debug(SMB,
6784                             "received exclusive & fail immediately request\n");
6785                 cmd = F_SETLK;
6786                 flock->fl_type = F_WRLCK;
6787                 break;
6788         case SMB2_LOCKFLAG_UNLOCK:
6789                 ksmbd_debug(SMB, "received unlock request\n");
6790                 flock->fl_type = F_UNLCK;
6791                 cmd = F_SETLK;
6792                 break;
6793         }
6794
6795         return cmd;
6796 }
6797
6798 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6799                                          unsigned int cmd, int flags,
6800                                          struct list_head *lock_list)
6801 {
6802         struct ksmbd_lock *lock;
6803
6804         lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6805         if (!lock)
6806                 return NULL;
6807
6808         lock->cmd = cmd;
6809         lock->fl = flock;
6810         lock->start = flock->fl_start;
6811         lock->end = flock->fl_end;
6812         lock->flags = flags;
6813         if (lock->start == lock->end)
6814                 lock->zero_len = 1;
6815         INIT_LIST_HEAD(&lock->clist);
6816         INIT_LIST_HEAD(&lock->flist);
6817         INIT_LIST_HEAD(&lock->llist);
6818         list_add_tail(&lock->llist, lock_list);
6819
6820         return lock;
6821 }
6822
6823 static void smb2_remove_blocked_lock(void **argv)
6824 {
6825         struct file_lock *flock = (struct file_lock *)argv[0];
6826
6827         ksmbd_vfs_posix_lock_unblock(flock);
6828         wake_up(&flock->fl_wait);
6829 }
6830
6831 static inline bool lock_defer_pending(struct file_lock *fl)
6832 {
6833         /* check pending lock waiters */
6834         return waitqueue_active(&fl->fl_wait);
6835 }
6836
6837 /**
6838  * smb2_lock() - handler for smb2 file lock command
6839  * @work:       smb work containing lock command buffer
6840  *
6841  * Return:      0 on success, otherwise error
6842  */
6843 int smb2_lock(struct ksmbd_work *work)
6844 {
6845         struct smb2_lock_req *req;
6846         struct smb2_lock_rsp *rsp;
6847         struct smb2_lock_element *lock_ele;
6848         struct ksmbd_file *fp = NULL;
6849         struct file_lock *flock = NULL;
6850         struct file *filp = NULL;
6851         int lock_count;
6852         int flags = 0;
6853         int cmd = 0;
6854         int err = -EIO, i, rc = 0;
6855         u64 lock_start, lock_length;
6856         struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6857         struct ksmbd_conn *conn;
6858         int nolock = 0;
6859         LIST_HEAD(lock_list);
6860         LIST_HEAD(rollback_list);
6861         int prior_lock = 0;
6862
6863         WORK_BUFFERS(work, req, rsp);
6864
6865         ksmbd_debug(SMB, "Received lock request\n");
6866         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6867         if (!fp) {
6868                 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
6869                 err = -ENOENT;
6870                 goto out2;
6871         }
6872
6873         filp = fp->filp;
6874         lock_count = le16_to_cpu(req->LockCount);
6875         lock_ele = req->locks;
6876
6877         ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6878         if (!lock_count) {
6879                 err = -EINVAL;
6880                 goto out2;
6881         }
6882
6883         for (i = 0; i < lock_count; i++) {
6884                 flags = le32_to_cpu(lock_ele[i].Flags);
6885
6886                 flock = smb_flock_init(filp);
6887                 if (!flock)
6888                         goto out;
6889
6890                 cmd = smb2_set_flock_flags(flock, flags);
6891
6892                 lock_start = le64_to_cpu(lock_ele[i].Offset);
6893                 lock_length = le64_to_cpu(lock_ele[i].Length);
6894                 if (lock_start > U64_MAX - lock_length) {
6895                         pr_err("Invalid lock range requested\n");
6896                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6897                         locks_free_lock(flock);
6898                         goto out;
6899                 }
6900
6901                 if (lock_start > OFFSET_MAX)
6902                         flock->fl_start = OFFSET_MAX;
6903                 else
6904                         flock->fl_start = lock_start;
6905
6906                 lock_length = le64_to_cpu(lock_ele[i].Length);
6907                 if (lock_length > OFFSET_MAX - flock->fl_start)
6908                         lock_length = OFFSET_MAX - flock->fl_start;
6909
6910                 flock->fl_end = flock->fl_start + lock_length;
6911
6912                 if (flock->fl_end < flock->fl_start) {
6913                         ksmbd_debug(SMB,
6914                                     "the end offset(%llx) is smaller than the start offset(%llx)\n",
6915                                     flock->fl_end, flock->fl_start);
6916                         rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6917                         locks_free_lock(flock);
6918                         goto out;
6919                 }
6920
6921                 /* Check conflict locks in one request */
6922                 list_for_each_entry(cmp_lock, &lock_list, llist) {
6923                         if (cmp_lock->fl->fl_start <= flock->fl_start &&
6924                             cmp_lock->fl->fl_end >= flock->fl_end) {
6925                                 if (cmp_lock->fl->fl_type != F_UNLCK &&
6926                                     flock->fl_type != F_UNLCK) {
6927                                         pr_err("conflict two locks in one request\n");
6928                                         err = -EINVAL;
6929                                         locks_free_lock(flock);
6930                                         goto out;
6931                                 }
6932                         }
6933                 }
6934
6935                 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6936                 if (!smb_lock) {
6937                         err = -EINVAL;
6938                         locks_free_lock(flock);
6939                         goto out;
6940                 }
6941         }
6942
6943         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6944                 if (smb_lock->cmd < 0) {
6945                         err = -EINVAL;
6946                         goto out;
6947                 }
6948
6949                 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6950                         err = -EINVAL;
6951                         goto out;
6952                 }
6953
6954                 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6955                      smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6956                     (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6957                      !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6958                         err = -EINVAL;
6959                         goto out;
6960                 }
6961
6962                 prior_lock = smb_lock->flags;
6963
6964                 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6965                     !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6966                         goto no_check_cl;
6967
6968                 nolock = 1;
6969                 /* check locks in connection list */
6970                 down_read(&conn_list_lock);
6971                 list_for_each_entry(conn, &conn_list, conns_list) {
6972                         spin_lock(&conn->llist_lock);
6973                         list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6974                                 if (file_inode(cmp_lock->fl->fl_file) !=
6975                                     file_inode(smb_lock->fl->fl_file))
6976                                         continue;
6977
6978                                 if (smb_lock->fl->fl_type == F_UNLCK) {
6979                                         if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6980                                             cmp_lock->start == smb_lock->start &&
6981                                             cmp_lock->end == smb_lock->end &&
6982                                             !lock_defer_pending(cmp_lock->fl)) {
6983                                                 nolock = 0;
6984                                                 list_del(&cmp_lock->flist);
6985                                                 list_del(&cmp_lock->clist);
6986                                                 spin_unlock(&conn->llist_lock);
6987                                                 up_read(&conn_list_lock);
6988
6989                                                 locks_free_lock(cmp_lock->fl);
6990                                                 kfree(cmp_lock);
6991                                                 goto out_check_cl;
6992                                         }
6993                                         continue;
6994                                 }
6995
6996                                 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
6997                                         if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
6998                                                 continue;
6999                                 } else {
7000                                         if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7001                                                 continue;
7002                                 }
7003
7004                                 /* check zero byte lock range */
7005                                 if (cmp_lock->zero_len && !smb_lock->zero_len &&
7006                                     cmp_lock->start > smb_lock->start &&
7007                                     cmp_lock->start < smb_lock->end) {
7008                                         spin_unlock(&conn->llist_lock);
7009                                         up_read(&conn_list_lock);
7010                                         pr_err("previous lock conflict with zero byte lock range\n");
7011                                         goto out;
7012                                 }
7013
7014                                 if (smb_lock->zero_len && !cmp_lock->zero_len &&
7015                                     smb_lock->start > cmp_lock->start &&
7016                                     smb_lock->start < cmp_lock->end) {
7017                                         spin_unlock(&conn->llist_lock);
7018                                         up_read(&conn_list_lock);
7019                                         pr_err("current lock conflict with zero byte lock range\n");
7020                                         goto out;
7021                                 }
7022
7023                                 if (((cmp_lock->start <= smb_lock->start &&
7024                                       cmp_lock->end > smb_lock->start) ||
7025                                      (cmp_lock->start < smb_lock->end &&
7026                                       cmp_lock->end >= smb_lock->end)) &&
7027                                     !cmp_lock->zero_len && !smb_lock->zero_len) {
7028                                         spin_unlock(&conn->llist_lock);
7029                                         up_read(&conn_list_lock);
7030                                         pr_err("Not allow lock operation on exclusive lock range\n");
7031                                         goto out;
7032                                 }
7033                         }
7034                         spin_unlock(&conn->llist_lock);
7035                 }
7036                 up_read(&conn_list_lock);
7037 out_check_cl:
7038                 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
7039                         pr_err("Try to unlock nolocked range\n");
7040                         rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7041                         goto out;
7042                 }
7043
7044 no_check_cl:
7045                 if (smb_lock->zero_len) {
7046                         err = 0;
7047                         goto skip;
7048                 }
7049
7050                 flock = smb_lock->fl;
7051                 list_del(&smb_lock->llist);
7052 retry:
7053                 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7054 skip:
7055                 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7056                         if (!rc) {
7057                                 ksmbd_debug(SMB, "File unlocked\n");
7058                         } else if (rc == -ENOENT) {
7059                                 rsp->hdr.Status = STATUS_NOT_LOCKED;
7060                                 goto out;
7061                         }
7062                         locks_free_lock(flock);
7063                         kfree(smb_lock);
7064                 } else {
7065                         if (rc == FILE_LOCK_DEFERRED) {
7066                                 void **argv;
7067
7068                                 ksmbd_debug(SMB,
7069                                             "would have to wait for getting lock\n");
7070                                 list_add(&smb_lock->llist, &rollback_list);
7071
7072                                 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7073                                 if (!argv) {
7074                                         err = -ENOMEM;
7075                                         goto out;
7076                                 }
7077                                 argv[0] = flock;
7078
7079                                 rc = setup_async_work(work,
7080                                                       smb2_remove_blocked_lock,
7081                                                       argv);
7082                                 if (rc) {
7083                                         kfree(argv);
7084                                         err = -ENOMEM;
7085                                         goto out;
7086                                 }
7087                                 spin_lock(&fp->f_lock);
7088                                 list_add(&work->fp_entry, &fp->blocked_works);
7089                                 spin_unlock(&fp->f_lock);
7090
7091                                 smb2_send_interim_resp(work, STATUS_PENDING);
7092
7093                                 ksmbd_vfs_posix_lock_wait(flock);
7094
7095                                 spin_lock(&fp->f_lock);
7096                                 list_del(&work->fp_entry);
7097                                 spin_unlock(&fp->f_lock);
7098
7099                                 if (work->state != KSMBD_WORK_ACTIVE) {
7100                                         list_del(&smb_lock->llist);
7101                                         locks_free_lock(flock);
7102
7103                                         if (work->state == KSMBD_WORK_CANCELLED) {
7104                                                 rsp->hdr.Status =
7105                                                         STATUS_CANCELLED;
7106                                                 kfree(smb_lock);
7107                                                 smb2_send_interim_resp(work,
7108                                                                        STATUS_CANCELLED);
7109                                                 work->send_no_response = 1;
7110                                                 goto out;
7111                                         }
7112
7113                                         rsp->hdr.Status =
7114                                                 STATUS_RANGE_NOT_LOCKED;
7115                                         kfree(smb_lock);
7116                                         goto out2;
7117                                 }
7118
7119                                 list_del(&smb_lock->llist);
7120                                 release_async_work(work);
7121                                 goto retry;
7122                         } else if (!rc) {
7123                                 list_add(&smb_lock->llist, &rollback_list);
7124                                 spin_lock(&work->conn->llist_lock);
7125                                 list_add_tail(&smb_lock->clist,
7126                                               &work->conn->lock_list);
7127                                 list_add_tail(&smb_lock->flist,
7128                                               &fp->lock_list);
7129                                 spin_unlock(&work->conn->llist_lock);
7130                                 ksmbd_debug(SMB, "successful in taking lock\n");
7131                         } else {
7132                                 goto out;
7133                         }
7134                 }
7135         }
7136
7137         if (atomic_read(&fp->f_ci->op_count) > 1)
7138                 smb_break_all_oplock(work, fp);
7139
7140         rsp->StructureSize = cpu_to_le16(4);
7141         ksmbd_debug(SMB, "successful in taking lock\n");
7142         rsp->hdr.Status = STATUS_SUCCESS;
7143         rsp->Reserved = 0;
7144         err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7145         if (err)
7146                 goto out;
7147
7148         ksmbd_fd_put(work, fp);
7149         return 0;
7150
7151 out:
7152         list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7153                 locks_free_lock(smb_lock->fl);
7154                 list_del(&smb_lock->llist);
7155                 kfree(smb_lock);
7156         }
7157
7158         list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7159                 struct file_lock *rlock = NULL;
7160
7161                 rlock = smb_flock_init(filp);
7162                 rlock->fl_type = F_UNLCK;
7163                 rlock->fl_start = smb_lock->start;
7164                 rlock->fl_end = smb_lock->end;
7165
7166                 rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7167                 if (rc)
7168                         pr_err("rollback unlock fail : %d\n", rc);
7169
7170                 list_del(&smb_lock->llist);
7171                 spin_lock(&work->conn->llist_lock);
7172                 if (!list_empty(&smb_lock->flist))
7173                         list_del(&smb_lock->flist);
7174                 list_del(&smb_lock->clist);
7175                 spin_unlock(&work->conn->llist_lock);
7176
7177                 locks_free_lock(smb_lock->fl);
7178                 locks_free_lock(rlock);
7179                 kfree(smb_lock);
7180         }
7181 out2:
7182         ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7183
7184         if (!rsp->hdr.Status) {
7185                 if (err == -EINVAL)
7186                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7187                 else if (err == -ENOMEM)
7188                         rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7189                 else if (err == -ENOENT)
7190                         rsp->hdr.Status = STATUS_FILE_CLOSED;
7191                 else
7192                         rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7193         }
7194
7195         smb2_set_err_rsp(work);
7196         ksmbd_fd_put(work, fp);
7197         return err;
7198 }
7199
7200 static int fsctl_copychunk(struct ksmbd_work *work,
7201                            struct copychunk_ioctl_req *ci_req,
7202                            unsigned int cnt_code,
7203                            unsigned int input_count,
7204                            unsigned long long volatile_id,
7205                            unsigned long long persistent_id,
7206                            struct smb2_ioctl_rsp *rsp)
7207 {
7208         struct copychunk_ioctl_rsp *ci_rsp;
7209         struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7210         struct srv_copychunk *chunks;
7211         unsigned int i, chunk_count, chunk_count_written = 0;
7212         unsigned int chunk_size_written = 0;
7213         loff_t total_size_written = 0;
7214         int ret = 0;
7215
7216         ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7217
7218         rsp->VolatileFileId = volatile_id;
7219         rsp->PersistentFileId = persistent_id;
7220         ci_rsp->ChunksWritten =
7221                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7222         ci_rsp->ChunkBytesWritten =
7223                 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7224         ci_rsp->TotalBytesWritten =
7225                 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7226
7227         chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7228         chunk_count = le32_to_cpu(ci_req->ChunkCount);
7229         if (chunk_count == 0)
7230                 goto out;
7231         total_size_written = 0;
7232
7233         /* verify the SRV_COPYCHUNK_COPY packet */
7234         if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7235             input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7236              chunk_count * sizeof(struct srv_copychunk)) {
7237                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7238                 return -EINVAL;
7239         }
7240
7241         for (i = 0; i < chunk_count; i++) {
7242                 if (le32_to_cpu(chunks[i].Length) == 0 ||
7243                     le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7244                         break;
7245                 total_size_written += le32_to_cpu(chunks[i].Length);
7246         }
7247
7248         if (i < chunk_count ||
7249             total_size_written > ksmbd_server_side_copy_max_total_size()) {
7250                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7251                 return -EINVAL;
7252         }
7253
7254         src_fp = ksmbd_lookup_foreign_fd(work,
7255                                          le64_to_cpu(ci_req->ResumeKey[0]));
7256         dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7257         ret = -EINVAL;
7258         if (!src_fp ||
7259             src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7260                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7261                 goto out;
7262         }
7263
7264         if (!dst_fp) {
7265                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7266                 goto out;
7267         }
7268
7269         /*
7270          * FILE_READ_DATA should only be included in
7271          * the FSCTL_COPYCHUNK case
7272          */
7273         if (cnt_code == FSCTL_COPYCHUNK &&
7274             !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7275                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7276                 goto out;
7277         }
7278
7279         ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7280                                          chunks, chunk_count,
7281                                          &chunk_count_written,
7282                                          &chunk_size_written,
7283                                          &total_size_written);
7284         if (ret < 0) {
7285                 if (ret == -EACCES)
7286                         rsp->hdr.Status = STATUS_ACCESS_DENIED;
7287                 if (ret == -EAGAIN)
7288                         rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7289                 else if (ret == -EBADF)
7290                         rsp->hdr.Status = STATUS_INVALID_HANDLE;
7291                 else if (ret == -EFBIG || ret == -ENOSPC)
7292                         rsp->hdr.Status = STATUS_DISK_FULL;
7293                 else if (ret == -EINVAL)
7294                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7295                 else if (ret == -EISDIR)
7296                         rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7297                 else if (ret == -E2BIG)
7298                         rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7299                 else
7300                         rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7301         }
7302
7303         ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7304         ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7305         ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7306 out:
7307         ksmbd_fd_put(work, src_fp);
7308         ksmbd_fd_put(work, dst_fp);
7309         return ret;
7310 }
7311
7312 static __be32 idev_ipv4_address(struct in_device *idev)
7313 {
7314         __be32 addr = 0;
7315
7316         struct in_ifaddr *ifa;
7317
7318         rcu_read_lock();
7319         in_dev_for_each_ifa_rcu(ifa, idev) {
7320                 if (ifa->ifa_flags & IFA_F_SECONDARY)
7321                         continue;
7322
7323                 addr = ifa->ifa_address;
7324                 break;
7325         }
7326         rcu_read_unlock();
7327         return addr;
7328 }
7329
7330 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7331                                         struct smb2_ioctl_rsp *rsp,
7332                                         unsigned int out_buf_len)
7333 {
7334         struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7335         int nbytes = 0;
7336         struct net_device *netdev;
7337         struct sockaddr_storage_rsp *sockaddr_storage;
7338         unsigned int flags;
7339         unsigned long long speed;
7340
7341         rtnl_lock();
7342         for_each_netdev(&init_net, netdev) {
7343                 bool ipv4_set = false;
7344
7345                 if (netdev->type == ARPHRD_LOOPBACK)
7346                         continue;
7347
7348                 flags = dev_get_flags(netdev);
7349                 if (!(flags & IFF_RUNNING))
7350                         continue;
7351 ipv6_retry:
7352                 if (out_buf_len <
7353                     nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7354                         rtnl_unlock();
7355                         return -ENOSPC;
7356                 }
7357
7358                 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7359                                 &rsp->Buffer[nbytes];
7360                 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7361
7362                 nii_rsp->Capability = 0;
7363                 if (netdev->real_num_tx_queues > 1)
7364                         nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7365                 if (ksmbd_rdma_capable_netdev(netdev))
7366                         nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7367
7368                 nii_rsp->Next = cpu_to_le32(152);
7369                 nii_rsp->Reserved = 0;
7370
7371                 if (netdev->ethtool_ops->get_link_ksettings) {
7372                         struct ethtool_link_ksettings cmd;
7373
7374                         netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7375                         speed = cmd.base.speed;
7376                 } else {
7377                         ksmbd_debug(SMB, "%s %s\n", netdev->name,
7378                                     "speed is unknown, defaulting to 1Gb/sec");
7379                         speed = SPEED_1000;
7380                 }
7381
7382                 speed *= 1000000;
7383                 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7384
7385                 sockaddr_storage = (struct sockaddr_storage_rsp *)
7386                                         nii_rsp->SockAddr_Storage;
7387                 memset(sockaddr_storage, 0, 128);
7388
7389                 if (!ipv4_set) {
7390                         struct in_device *idev;
7391
7392                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7393                         sockaddr_storage->addr4.Port = 0;
7394
7395                         idev = __in_dev_get_rtnl(netdev);
7396                         if (!idev)
7397                                 continue;
7398                         sockaddr_storage->addr4.IPv4address =
7399                                                 idev_ipv4_address(idev);
7400                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7401                         ipv4_set = true;
7402                         goto ipv6_retry;
7403                 } else {
7404                         struct inet6_dev *idev6;
7405                         struct inet6_ifaddr *ifa;
7406                         __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7407
7408                         sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7409                         sockaddr_storage->addr6.Port = 0;
7410                         sockaddr_storage->addr6.FlowInfo = 0;
7411
7412                         idev6 = __in6_dev_get(netdev);
7413                         if (!idev6)
7414                                 continue;
7415
7416                         list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7417                                 if (ifa->flags & (IFA_F_TENTATIVE |
7418                                                         IFA_F_DEPRECATED))
7419                                         continue;
7420                                 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7421                                 break;
7422                         }
7423                         sockaddr_storage->addr6.ScopeId = 0;
7424                         nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7425                 }
7426         }
7427         rtnl_unlock();
7428
7429         /* zero if this is last one */
7430         if (nii_rsp)
7431                 nii_rsp->Next = 0;
7432
7433         rsp->PersistentFileId = SMB2_NO_FID;
7434         rsp->VolatileFileId = SMB2_NO_FID;
7435         return nbytes;
7436 }
7437
7438 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7439                                          struct validate_negotiate_info_req *neg_req,
7440                                          struct validate_negotiate_info_rsp *neg_rsp,
7441                                          unsigned int in_buf_len)
7442 {
7443         int ret = 0;
7444         int dialect;
7445
7446         if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7447                         le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7448                 return -EINVAL;
7449
7450         dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7451                                              neg_req->DialectCount);
7452         if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7453                 ret = -EINVAL;
7454                 goto err_out;
7455         }
7456
7457         if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7458                 ret = -EINVAL;
7459                 goto err_out;
7460         }
7461
7462         if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7463                 ret = -EINVAL;
7464                 goto err_out;
7465         }
7466
7467         if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7468                 ret = -EINVAL;
7469                 goto err_out;
7470         }
7471
7472         neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7473         memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7474         neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7475         neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7476 err_out:
7477         return ret;
7478 }
7479
7480 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7481                                         struct file_allocated_range_buffer *qar_req,
7482                                         struct file_allocated_range_buffer *qar_rsp,
7483                                         unsigned int in_count, unsigned int *out_count)
7484 {
7485         struct ksmbd_file *fp;
7486         loff_t start, length;
7487         int ret = 0;
7488
7489         *out_count = 0;
7490         if (in_count == 0)
7491                 return -EINVAL;
7492
7493         start = le64_to_cpu(qar_req->file_offset);
7494         length = le64_to_cpu(qar_req->length);
7495
7496         if (start < 0 || length < 0)
7497                 return -EINVAL;
7498
7499         fp = ksmbd_lookup_fd_fast(work, id);
7500         if (!fp)
7501                 return -ENOENT;
7502
7503         ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7504                                    qar_rsp, in_count, out_count);
7505         if (ret && ret != -E2BIG)
7506                 *out_count = 0;
7507
7508         ksmbd_fd_put(work, fp);
7509         return ret;
7510 }
7511
7512 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7513                                  unsigned int out_buf_len,
7514                                  struct smb2_ioctl_req *req,
7515                                  struct smb2_ioctl_rsp *rsp)
7516 {
7517         struct ksmbd_rpc_command *rpc_resp;
7518         char *data_buf = (char *)&req->Buffer[0];
7519         int nbytes = 0;
7520
7521         rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7522                                    le32_to_cpu(req->InputCount));
7523         if (rpc_resp) {
7524                 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7525                         /*
7526                          * set STATUS_SOME_NOT_MAPPED response
7527                          * for unknown domain sid.
7528                          */
7529                         rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7530                 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7531                         rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7532                         goto out;
7533                 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7534                         rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7535                         goto out;
7536                 }
7537
7538                 nbytes = rpc_resp->payload_sz;
7539                 if (rpc_resp->payload_sz > out_buf_len) {
7540                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7541                         nbytes = out_buf_len;
7542                 }
7543
7544                 if (!rpc_resp->payload_sz) {
7545                         rsp->hdr.Status =
7546                                 STATUS_UNEXPECTED_IO_ERROR;
7547                         goto out;
7548                 }
7549
7550                 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7551         }
7552 out:
7553         kvfree(rpc_resp);
7554         return nbytes;
7555 }
7556
7557 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7558                                    struct file_sparse *sparse)
7559 {
7560         struct ksmbd_file *fp;
7561         struct mnt_idmap *idmap;
7562         int ret = 0;
7563         __le32 old_fattr;
7564
7565         fp = ksmbd_lookup_fd_fast(work, id);
7566         if (!fp)
7567                 return -ENOENT;
7568         idmap = file_mnt_idmap(fp->filp);
7569
7570         old_fattr = fp->f_ci->m_fattr;
7571         if (sparse->SetSparse)
7572                 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7573         else
7574                 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7575
7576         if (fp->f_ci->m_fattr != old_fattr &&
7577             test_share_config_flag(work->tcon->share_conf,
7578                                    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7579                 struct xattr_dos_attrib da;
7580
7581                 ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7582                                                      fp->filp->f_path.dentry, &da);
7583                 if (ret <= 0)
7584                         goto out;
7585
7586                 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7587                 ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7588                                                      &fp->filp->f_path,
7589                                                      &da, true);
7590                 if (ret)
7591                         fp->f_ci->m_fattr = old_fattr;
7592         }
7593
7594 out:
7595         ksmbd_fd_put(work, fp);
7596         return ret;
7597 }
7598
7599 static int fsctl_request_resume_key(struct ksmbd_work *work,
7600                                     struct smb2_ioctl_req *req,
7601                                     struct resume_key_ioctl_rsp *key_rsp)
7602 {
7603         struct ksmbd_file *fp;
7604
7605         fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7606         if (!fp)
7607                 return -ENOENT;
7608
7609         memset(key_rsp, 0, sizeof(*key_rsp));
7610         key_rsp->ResumeKey[0] = req->VolatileFileId;
7611         key_rsp->ResumeKey[1] = req->PersistentFileId;
7612         ksmbd_fd_put(work, fp);
7613
7614         return 0;
7615 }
7616
7617 /**
7618  * smb2_ioctl() - handler for smb2 ioctl command
7619  * @work:       smb work containing ioctl command buffer
7620  *
7621  * Return:      0 on success, otherwise error
7622  */
7623 int smb2_ioctl(struct ksmbd_work *work)
7624 {
7625         struct smb2_ioctl_req *req;
7626         struct smb2_ioctl_rsp *rsp;
7627         unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7628         u64 id = KSMBD_NO_FID;
7629         struct ksmbd_conn *conn = work->conn;
7630         int ret = 0;
7631
7632         if (work->next_smb2_rcv_hdr_off) {
7633                 req = ksmbd_req_buf_next(work);
7634                 rsp = ksmbd_resp_buf_next(work);
7635                 if (!has_file_id(req->VolatileFileId)) {
7636                         ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7637                                     work->compound_fid);
7638                         id = work->compound_fid;
7639                 }
7640         } else {
7641                 req = smb2_get_msg(work->request_buf);
7642                 rsp = smb2_get_msg(work->response_buf);
7643         }
7644
7645         if (!has_file_id(id))
7646                 id = req->VolatileFileId;
7647
7648         if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7649                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7650                 goto out;
7651         }
7652
7653         cnt_code = le32_to_cpu(req->CtlCode);
7654         ret = smb2_calc_max_out_buf_len(work, 48,
7655                                         le32_to_cpu(req->MaxOutputResponse));
7656         if (ret < 0) {
7657                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7658                 goto out;
7659         }
7660         out_buf_len = (unsigned int)ret;
7661         in_buf_len = le32_to_cpu(req->InputCount);
7662
7663         switch (cnt_code) {
7664         case FSCTL_DFS_GET_REFERRALS:
7665         case FSCTL_DFS_GET_REFERRALS_EX:
7666                 /* Not support DFS yet */
7667                 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7668                 goto out;
7669         case FSCTL_CREATE_OR_GET_OBJECT_ID:
7670         {
7671                 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7672
7673                 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7674                 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7675                         &rsp->Buffer[0];
7676
7677                 /*
7678                  * TODO: This is dummy implementation to pass smbtorture
7679                  * Need to check correct response later
7680                  */
7681                 memset(obj_buf->ObjectId, 0x0, 16);
7682                 memset(obj_buf->BirthVolumeId, 0x0, 16);
7683                 memset(obj_buf->BirthObjectId, 0x0, 16);
7684                 memset(obj_buf->DomainId, 0x0, 16);
7685
7686                 break;
7687         }
7688         case FSCTL_PIPE_TRANSCEIVE:
7689                 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7690                 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7691                 break;
7692         case FSCTL_VALIDATE_NEGOTIATE_INFO:
7693                 if (conn->dialect < SMB30_PROT_ID) {
7694                         ret = -EOPNOTSUPP;
7695                         goto out;
7696                 }
7697
7698                 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
7699                                           Dialects)) {
7700                         ret = -EINVAL;
7701                         goto out;
7702                 }
7703
7704                 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
7705                         ret = -EINVAL;
7706                         goto out;
7707                 }
7708
7709                 ret = fsctl_validate_negotiate_info(conn,
7710                         (struct validate_negotiate_info_req *)&req->Buffer[0],
7711                         (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7712                         in_buf_len);
7713                 if (ret < 0)
7714                         goto out;
7715
7716                 nbytes = sizeof(struct validate_negotiate_info_rsp);
7717                 rsp->PersistentFileId = SMB2_NO_FID;
7718                 rsp->VolatileFileId = SMB2_NO_FID;
7719                 break;
7720         case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7721                 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7722                 if (ret < 0)
7723                         goto out;
7724                 nbytes = ret;
7725                 break;
7726         case FSCTL_REQUEST_RESUME_KEY:
7727                 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7728                         ret = -EINVAL;
7729                         goto out;
7730                 }
7731
7732                 ret = fsctl_request_resume_key(work, req,
7733                                                (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7734                 if (ret < 0)
7735                         goto out;
7736                 rsp->PersistentFileId = req->PersistentFileId;
7737                 rsp->VolatileFileId = req->VolatileFileId;
7738                 nbytes = sizeof(struct resume_key_ioctl_rsp);
7739                 break;
7740         case FSCTL_COPYCHUNK:
7741         case FSCTL_COPYCHUNK_WRITE:
7742                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7743                         ksmbd_debug(SMB,
7744                                     "User does not have write permission\n");
7745                         ret = -EACCES;
7746                         goto out;
7747                 }
7748
7749                 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7750                         ret = -EINVAL;
7751                         goto out;
7752                 }
7753
7754                 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7755                         ret = -EINVAL;
7756                         goto out;
7757                 }
7758
7759                 nbytes = sizeof(struct copychunk_ioctl_rsp);
7760                 rsp->VolatileFileId = req->VolatileFileId;
7761                 rsp->PersistentFileId = req->PersistentFileId;
7762                 fsctl_copychunk(work,
7763                                 (struct copychunk_ioctl_req *)&req->Buffer[0],
7764                                 le32_to_cpu(req->CtlCode),
7765                                 le32_to_cpu(req->InputCount),
7766                                 req->VolatileFileId,
7767                                 req->PersistentFileId,
7768                                 rsp);
7769                 break;
7770         case FSCTL_SET_SPARSE:
7771                 if (in_buf_len < sizeof(struct file_sparse)) {
7772                         ret = -EINVAL;
7773                         goto out;
7774                 }
7775
7776                 ret = fsctl_set_sparse(work, id,
7777                                        (struct file_sparse *)&req->Buffer[0]);
7778                 if (ret < 0)
7779                         goto out;
7780                 break;
7781         case FSCTL_SET_ZERO_DATA:
7782         {
7783                 struct file_zero_data_information *zero_data;
7784                 struct ksmbd_file *fp;
7785                 loff_t off, len, bfz;
7786
7787                 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7788                         ksmbd_debug(SMB,
7789                                     "User does not have write permission\n");
7790                         ret = -EACCES;
7791                         goto out;
7792                 }
7793
7794                 if (in_buf_len < sizeof(struct file_zero_data_information)) {
7795                         ret = -EINVAL;
7796                         goto out;
7797                 }
7798
7799                 zero_data =
7800                         (struct file_zero_data_information *)&req->Buffer[0];
7801
7802                 off = le64_to_cpu(zero_data->FileOffset);
7803                 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
7804                 if (off < 0 || bfz < 0 || off > bfz) {
7805                         ret = -EINVAL;
7806                         goto out;
7807                 }
7808
7809                 len = bfz - off;
7810                 if (len) {
7811                         fp = ksmbd_lookup_fd_fast(work, id);
7812                         if (!fp) {
7813                                 ret = -ENOENT;
7814                                 goto out;
7815                         }
7816
7817                         ret = ksmbd_vfs_zero_data(work, fp, off, len);
7818                         ksmbd_fd_put(work, fp);
7819                         if (ret < 0)
7820                                 goto out;
7821                 }
7822                 break;
7823         }
7824         case FSCTL_QUERY_ALLOCATED_RANGES:
7825                 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7826                         ret = -EINVAL;
7827                         goto out;
7828                 }
7829
7830                 ret = fsctl_query_allocated_ranges(work, id,
7831                         (struct file_allocated_range_buffer *)&req->Buffer[0],
7832                         (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7833                         out_buf_len /
7834                         sizeof(struct file_allocated_range_buffer), &nbytes);
7835                 if (ret == -E2BIG) {
7836                         rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7837                 } else if (ret < 0) {
7838                         nbytes = 0;
7839                         goto out;
7840                 }
7841
7842                 nbytes *= sizeof(struct file_allocated_range_buffer);
7843                 break;
7844         case FSCTL_GET_REPARSE_POINT:
7845         {
7846                 struct reparse_data_buffer *reparse_ptr;
7847                 struct ksmbd_file *fp;
7848
7849                 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7850                 fp = ksmbd_lookup_fd_fast(work, id);
7851                 if (!fp) {
7852                         pr_err("not found fp!!\n");
7853                         ret = -ENOENT;
7854                         goto out;
7855                 }
7856
7857                 reparse_ptr->ReparseTag =
7858                         smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7859                 reparse_ptr->ReparseDataLength = 0;
7860                 ksmbd_fd_put(work, fp);
7861                 nbytes = sizeof(struct reparse_data_buffer);
7862                 break;
7863         }
7864         case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7865         {
7866                 struct ksmbd_file *fp_in, *fp_out = NULL;
7867                 struct duplicate_extents_to_file *dup_ext;
7868                 loff_t src_off, dst_off, length, cloned;
7869
7870                 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7871                         ret = -EINVAL;
7872                         goto out;
7873                 }
7874
7875                 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7876
7877                 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7878                                              dup_ext->PersistentFileHandle);
7879                 if (!fp_in) {
7880                         pr_err("not found file handle in duplicate extent to file\n");
7881                         ret = -ENOENT;
7882                         goto out;
7883                 }
7884
7885                 fp_out = ksmbd_lookup_fd_fast(work, id);
7886                 if (!fp_out) {
7887                         pr_err("not found fp\n");
7888                         ret = -ENOENT;
7889                         goto dup_ext_out;
7890                 }
7891
7892                 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7893                 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7894                 length = le64_to_cpu(dup_ext->ByteCount);
7895                 /*
7896                  * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
7897                  * should fall back to vfs_copy_file_range().  This could be
7898                  * beneficial when re-exporting nfs/smb mount, but note that
7899                  * this can result in partial copy that returns an error status.
7900                  * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
7901                  * fall back to vfs_copy_file_range(), should be avoided when
7902                  * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
7903                  */
7904                 cloned = vfs_clone_file_range(fp_in->filp, src_off,
7905                                               fp_out->filp, dst_off, length, 0);
7906                 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7907                         ret = -EOPNOTSUPP;
7908                         goto dup_ext_out;
7909                 } else if (cloned != length) {
7910                         cloned = vfs_copy_file_range(fp_in->filp, src_off,
7911                                                      fp_out->filp, dst_off,
7912                                                      length, 0);
7913                         if (cloned != length) {
7914                                 if (cloned < 0)
7915                                         ret = cloned;
7916                                 else
7917                                         ret = -EINVAL;
7918                         }
7919                 }
7920
7921 dup_ext_out:
7922                 ksmbd_fd_put(work, fp_in);
7923                 ksmbd_fd_put(work, fp_out);
7924                 if (ret < 0)
7925                         goto out;
7926                 break;
7927         }
7928         default:
7929                 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7930                             cnt_code);
7931                 ret = -EOPNOTSUPP;
7932                 goto out;
7933         }
7934
7935         rsp->CtlCode = cpu_to_le32(cnt_code);
7936         rsp->InputCount = cpu_to_le32(0);
7937         rsp->InputOffset = cpu_to_le32(112);
7938         rsp->OutputOffset = cpu_to_le32(112);
7939         rsp->OutputCount = cpu_to_le32(nbytes);
7940         rsp->StructureSize = cpu_to_le16(49);
7941         rsp->Reserved = cpu_to_le16(0);
7942         rsp->Flags = cpu_to_le32(0);
7943         rsp->Reserved2 = cpu_to_le32(0);
7944         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
7945         if (!ret)
7946                 return ret;
7947
7948 out:
7949         if (ret == -EACCES)
7950                 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7951         else if (ret == -ENOENT)
7952                 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7953         else if (ret == -EOPNOTSUPP)
7954                 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7955         else if (ret == -ENOSPC)
7956                 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7957         else if (ret < 0 || rsp->hdr.Status == 0)
7958                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7959         smb2_set_err_rsp(work);
7960         return 0;
7961 }
7962
7963 /**
7964  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7965  * @work:       smb work containing oplock break command buffer
7966  *
7967  * Return:      0
7968  */
7969 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7970 {
7971         struct smb2_oplock_break *req;
7972         struct smb2_oplock_break *rsp;
7973         struct ksmbd_file *fp;
7974         struct oplock_info *opinfo = NULL;
7975         __le32 err = 0;
7976         int ret = 0;
7977         u64 volatile_id, persistent_id;
7978         char req_oplevel = 0, rsp_oplevel = 0;
7979         unsigned int oplock_change_type;
7980
7981         WORK_BUFFERS(work, req, rsp);
7982
7983         volatile_id = req->VolatileFid;
7984         persistent_id = req->PersistentFid;
7985         req_oplevel = req->OplockLevel;
7986         ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7987                     volatile_id, persistent_id, req_oplevel);
7988
7989         fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7990         if (!fp) {
7991                 rsp->hdr.Status = STATUS_FILE_CLOSED;
7992                 smb2_set_err_rsp(work);
7993                 return;
7994         }
7995
7996         opinfo = opinfo_get(fp);
7997         if (!opinfo) {
7998                 pr_err("unexpected null oplock_info\n");
7999                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8000                 smb2_set_err_rsp(work);
8001                 ksmbd_fd_put(work, fp);
8002                 return;
8003         }
8004
8005         if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8006                 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8007                 goto err_out;
8008         }
8009
8010         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8011                 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8012                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8013                 goto err_out;
8014         }
8015
8016         if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8017              opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8018             (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8019              req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8020                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8021                 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8022         } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8023                    req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8024                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8025                 oplock_change_type = OPLOCK_READ_TO_NONE;
8026         } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8027                    req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8028                 err = STATUS_INVALID_DEVICE_STATE;
8029                 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8030                      opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8031                     req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8032                         oplock_change_type = OPLOCK_WRITE_TO_READ;
8033                 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8034                             opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8035                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8036                         oplock_change_type = OPLOCK_WRITE_TO_NONE;
8037                 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8038                            req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8039                         oplock_change_type = OPLOCK_READ_TO_NONE;
8040                 } else {
8041                         oplock_change_type = 0;
8042                 }
8043         } else {
8044                 oplock_change_type = 0;
8045         }
8046
8047         switch (oplock_change_type) {
8048         case OPLOCK_WRITE_TO_READ:
8049                 ret = opinfo_write_to_read(opinfo);
8050                 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8051                 break;
8052         case OPLOCK_WRITE_TO_NONE:
8053                 ret = opinfo_write_to_none(opinfo);
8054                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8055                 break;
8056         case OPLOCK_READ_TO_NONE:
8057                 ret = opinfo_read_to_none(opinfo);
8058                 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8059                 break;
8060         default:
8061                 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8062                        opinfo->level, rsp_oplevel);
8063         }
8064
8065         if (ret < 0) {
8066                 rsp->hdr.Status = err;
8067                 goto err_out;
8068         }
8069
8070         opinfo->op_state = OPLOCK_STATE_NONE;
8071         wake_up_interruptible_all(&opinfo->oplock_q);
8072         opinfo_put(opinfo);
8073         ksmbd_fd_put(work, fp);
8074
8075         rsp->StructureSize = cpu_to_le16(24);
8076         rsp->OplockLevel = rsp_oplevel;
8077         rsp->Reserved = 0;
8078         rsp->Reserved2 = 0;
8079         rsp->VolatileFid = volatile_id;
8080         rsp->PersistentFid = persistent_id;
8081         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8082         if (!ret)
8083                 return;
8084
8085 err_out:
8086         opinfo->op_state = OPLOCK_STATE_NONE;
8087         wake_up_interruptible_all(&opinfo->oplock_q);
8088
8089         opinfo_put(opinfo);
8090         ksmbd_fd_put(work, fp);
8091         smb2_set_err_rsp(work);
8092 }
8093
8094 static int check_lease_state(struct lease *lease, __le32 req_state)
8095 {
8096         if ((lease->new_state ==
8097              (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8098             !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8099                 lease->new_state = req_state;
8100                 return 0;
8101         }
8102
8103         if (lease->new_state == req_state)
8104                 return 0;
8105
8106         return 1;
8107 }
8108
8109 /**
8110  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8111  * @work:       smb work containing lease break command buffer
8112  *
8113  * Return:      0
8114  */
8115 static void smb21_lease_break_ack(struct ksmbd_work *work)
8116 {
8117         struct ksmbd_conn *conn = work->conn;
8118         struct smb2_lease_ack *req;
8119         struct smb2_lease_ack *rsp;
8120         struct oplock_info *opinfo;
8121         __le32 err = 0;
8122         int ret = 0;
8123         unsigned int lease_change_type;
8124         __le32 lease_state;
8125         struct lease *lease;
8126
8127         WORK_BUFFERS(work, req, rsp);
8128
8129         ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8130                     le32_to_cpu(req->LeaseState));
8131         opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8132         if (!opinfo) {
8133                 ksmbd_debug(OPLOCK, "file not opened\n");
8134                 smb2_set_err_rsp(work);
8135                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8136                 return;
8137         }
8138         lease = opinfo->o_lease;
8139
8140         if (opinfo->op_state == OPLOCK_STATE_NONE) {
8141                 pr_err("unexpected lease break state 0x%x\n",
8142                        opinfo->op_state);
8143                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8144                 goto err_out;
8145         }
8146
8147         if (check_lease_state(lease, req->LeaseState)) {
8148                 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8149                 ksmbd_debug(OPLOCK,
8150                             "req lease state: 0x%x, expected state: 0x%x\n",
8151                             req->LeaseState, lease->new_state);
8152                 goto err_out;
8153         }
8154
8155         if (!atomic_read(&opinfo->breaking_cnt)) {
8156                 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8157                 goto err_out;
8158         }
8159
8160         /* check for bad lease state */
8161         if (req->LeaseState &
8162             (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8163                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8164                 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8165                         lease_change_type = OPLOCK_WRITE_TO_NONE;
8166                 else
8167                         lease_change_type = OPLOCK_READ_TO_NONE;
8168                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8169                             le32_to_cpu(lease->state),
8170                             le32_to_cpu(req->LeaseState));
8171         } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8172                    req->LeaseState != SMB2_LEASE_NONE_LE) {
8173                 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8174                 lease_change_type = OPLOCK_READ_TO_NONE;
8175                 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8176                             le32_to_cpu(lease->state),
8177                             le32_to_cpu(req->LeaseState));
8178         } else {
8179                 /* valid lease state changes */
8180                 err = STATUS_INVALID_DEVICE_STATE;
8181                 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8182                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8183                                 lease_change_type = OPLOCK_WRITE_TO_NONE;
8184                         else
8185                                 lease_change_type = OPLOCK_READ_TO_NONE;
8186                 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8187                         if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8188                                 lease_change_type = OPLOCK_WRITE_TO_READ;
8189                         else
8190                                 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8191                 } else {
8192                         lease_change_type = 0;
8193                 }
8194         }
8195
8196         switch (lease_change_type) {
8197         case OPLOCK_WRITE_TO_READ:
8198                 ret = opinfo_write_to_read(opinfo);
8199                 break;
8200         case OPLOCK_READ_HANDLE_TO_READ:
8201                 ret = opinfo_read_handle_to_read(opinfo);
8202                 break;
8203         case OPLOCK_WRITE_TO_NONE:
8204                 ret = opinfo_write_to_none(opinfo);
8205                 break;
8206         case OPLOCK_READ_TO_NONE:
8207                 ret = opinfo_read_to_none(opinfo);
8208                 break;
8209         default:
8210                 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8211                             le32_to_cpu(lease->state),
8212                             le32_to_cpu(req->LeaseState));
8213         }
8214
8215         lease_state = lease->state;
8216         opinfo->op_state = OPLOCK_STATE_NONE;
8217         wake_up_interruptible_all(&opinfo->oplock_q);
8218         atomic_dec(&opinfo->breaking_cnt);
8219         wake_up_interruptible_all(&opinfo->oplock_brk);
8220         opinfo_put(opinfo);
8221
8222         if (ret < 0) {
8223                 rsp->hdr.Status = err;
8224                 goto err_out;
8225         }
8226
8227         rsp->StructureSize = cpu_to_le16(36);
8228         rsp->Reserved = 0;
8229         rsp->Flags = 0;
8230         memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8231         rsp->LeaseState = lease_state;
8232         rsp->LeaseDuration = 0;
8233         ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8234         if (!ret)
8235                 return;
8236
8237 err_out:
8238         wake_up_interruptible_all(&opinfo->oplock_q);
8239         atomic_dec(&opinfo->breaking_cnt);
8240         wake_up_interruptible_all(&opinfo->oplock_brk);
8241
8242         opinfo_put(opinfo);
8243         smb2_set_err_rsp(work);
8244 }
8245
8246 /**
8247  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8248  * @work:       smb work containing oplock/lease break command buffer
8249  *
8250  * Return:      0
8251  */
8252 int smb2_oplock_break(struct ksmbd_work *work)
8253 {
8254         struct smb2_oplock_break *req;
8255         struct smb2_oplock_break *rsp;
8256
8257         WORK_BUFFERS(work, req, rsp);
8258
8259         switch (le16_to_cpu(req->StructureSize)) {
8260         case OP_BREAK_STRUCT_SIZE_20:
8261                 smb20_oplock_break_ack(work);
8262                 break;
8263         case OP_BREAK_STRUCT_SIZE_21:
8264                 smb21_lease_break_ack(work);
8265                 break;
8266         default:
8267                 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8268                             le16_to_cpu(req->StructureSize));
8269                 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8270                 smb2_set_err_rsp(work);
8271         }
8272
8273         return 0;
8274 }
8275
8276 /**
8277  * smb2_notify() - handler for smb2 notify request
8278  * @work:   smb work containing notify command buffer
8279  *
8280  * Return:      0
8281  */
8282 int smb2_notify(struct ksmbd_work *work)
8283 {
8284         struct smb2_change_notify_req *req;
8285         struct smb2_change_notify_rsp *rsp;
8286
8287         WORK_BUFFERS(work, req, rsp);
8288
8289         if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8290                 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8291                 smb2_set_err_rsp(work);
8292                 return 0;
8293         }
8294
8295         smb2_set_err_rsp(work);
8296         rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8297         return 0;
8298 }
8299
8300 /**
8301  * smb2_is_sign_req() - handler for checking packet signing status
8302  * @work:       smb work containing notify command buffer
8303  * @command:    SMB2 command id
8304  *
8305  * Return:      true if packed is signed, false otherwise
8306  */
8307 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8308 {
8309         struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8310
8311         if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8312             command != SMB2_NEGOTIATE_HE &&
8313             command != SMB2_SESSION_SETUP_HE &&
8314             command != SMB2_OPLOCK_BREAK_HE)
8315                 return true;
8316
8317         return false;
8318 }
8319
8320 /**
8321  * smb2_check_sign_req() - handler for req packet sign processing
8322  * @work:   smb work containing notify command buffer
8323  *
8324  * Return:      1 on success, 0 otherwise
8325  */
8326 int smb2_check_sign_req(struct ksmbd_work *work)
8327 {
8328         struct smb2_hdr *hdr;
8329         char signature_req[SMB2_SIGNATURE_SIZE];
8330         char signature[SMB2_HMACSHA256_SIZE];
8331         struct kvec iov[1];
8332         size_t len;
8333
8334         hdr = smb2_get_msg(work->request_buf);
8335         if (work->next_smb2_rcv_hdr_off)
8336                 hdr = ksmbd_req_buf_next(work);
8337
8338         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8339                 len = get_rfc1002_len(work->request_buf);
8340         else if (hdr->NextCommand)
8341                 len = le32_to_cpu(hdr->NextCommand);
8342         else
8343                 len = get_rfc1002_len(work->request_buf) -
8344                         work->next_smb2_rcv_hdr_off;
8345
8346         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8347         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8348
8349         iov[0].iov_base = (char *)&hdr->ProtocolId;
8350         iov[0].iov_len = len;
8351
8352         if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8353                                 signature))
8354                 return 0;
8355
8356         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8357                 pr_err("bad smb2 signature\n");
8358                 return 0;
8359         }
8360
8361         return 1;
8362 }
8363
8364 /**
8365  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8366  * @work:   smb work containing notify command buffer
8367  *
8368  */
8369 void smb2_set_sign_rsp(struct ksmbd_work *work)
8370 {
8371         struct smb2_hdr *hdr;
8372         char signature[SMB2_HMACSHA256_SIZE];
8373         struct kvec *iov;
8374         int n_vec = 1;
8375
8376         hdr = ksmbd_resp_buf_curr(work);
8377         hdr->Flags |= SMB2_FLAGS_SIGNED;
8378         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8379
8380         if (hdr->Command == SMB2_READ) {
8381                 iov = &work->iov[work->iov_idx - 1];
8382                 n_vec++;
8383         } else {
8384                 iov = &work->iov[work->iov_idx];
8385         }
8386
8387         if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8388                                  signature))
8389                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8390 }
8391
8392 /**
8393  * smb3_check_sign_req() - handler for req packet sign processing
8394  * @work:   smb work containing notify command buffer
8395  *
8396  * Return:      1 on success, 0 otherwise
8397  */
8398 int smb3_check_sign_req(struct ksmbd_work *work)
8399 {
8400         struct ksmbd_conn *conn = work->conn;
8401         char *signing_key;
8402         struct smb2_hdr *hdr;
8403         struct channel *chann;
8404         char signature_req[SMB2_SIGNATURE_SIZE];
8405         char signature[SMB2_CMACAES_SIZE];
8406         struct kvec iov[1];
8407         size_t len;
8408
8409         hdr = smb2_get_msg(work->request_buf);
8410         if (work->next_smb2_rcv_hdr_off)
8411                 hdr = ksmbd_req_buf_next(work);
8412
8413         if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8414                 len = get_rfc1002_len(work->request_buf);
8415         else if (hdr->NextCommand)
8416                 len = le32_to_cpu(hdr->NextCommand);
8417         else
8418                 len = get_rfc1002_len(work->request_buf) -
8419                         work->next_smb2_rcv_hdr_off;
8420
8421         if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8422                 signing_key = work->sess->smb3signingkey;
8423         } else {
8424                 chann = lookup_chann_list(work->sess, conn);
8425                 if (!chann) {
8426                         return 0;
8427                 }
8428                 signing_key = chann->smb3signingkey;
8429         }
8430
8431         if (!signing_key) {
8432                 pr_err("SMB3 signing key is not generated\n");
8433                 return 0;
8434         }
8435
8436         memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8437         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8438         iov[0].iov_base = (char *)&hdr->ProtocolId;
8439         iov[0].iov_len = len;
8440
8441         if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8442                 return 0;
8443
8444         if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8445                 pr_err("bad smb2 signature\n");
8446                 return 0;
8447         }
8448
8449         return 1;
8450 }
8451
8452 /**
8453  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8454  * @work:   smb work containing notify command buffer
8455  *
8456  */
8457 void smb3_set_sign_rsp(struct ksmbd_work *work)
8458 {
8459         struct ksmbd_conn *conn = work->conn;
8460         struct smb2_hdr *hdr;
8461         struct channel *chann;
8462         char signature[SMB2_CMACAES_SIZE];
8463         struct kvec *iov;
8464         int n_vec = 1;
8465         char *signing_key;
8466
8467         hdr = ksmbd_resp_buf_curr(work);
8468
8469         if (conn->binding == false &&
8470             le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8471                 signing_key = work->sess->smb3signingkey;
8472         } else {
8473                 chann = lookup_chann_list(work->sess, work->conn);
8474                 if (!chann) {
8475                         return;
8476                 }
8477                 signing_key = chann->smb3signingkey;
8478         }
8479
8480         if (!signing_key)
8481                 return;
8482
8483         hdr->Flags |= SMB2_FLAGS_SIGNED;
8484         memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8485
8486         if (hdr->Command == SMB2_READ) {
8487                 iov = &work->iov[work->iov_idx - 1];
8488                 n_vec++;
8489         } else {
8490                 iov = &work->iov[work->iov_idx];
8491         }
8492
8493         if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8494                                  signature))
8495                 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8496 }
8497
8498 /**
8499  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8500  * @work:   smb work containing response buffer
8501  *
8502  */
8503 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8504 {
8505         struct ksmbd_conn *conn = work->conn;
8506         struct ksmbd_session *sess = work->sess;
8507         struct smb2_hdr *req, *rsp;
8508
8509         if (conn->dialect != SMB311_PROT_ID)
8510                 return;
8511
8512         WORK_BUFFERS(work, req, rsp);
8513
8514         if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8515             conn->preauth_info)
8516                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8517                                                  conn->preauth_info->Preauth_HashValue);
8518
8519         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8520                 __u8 *hash_value;
8521
8522                 if (conn->binding) {
8523                         struct preauth_session *preauth_sess;
8524
8525                         preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8526                         if (!preauth_sess)
8527                                 return;
8528                         hash_value = preauth_sess->Preauth_HashValue;
8529                 } else {
8530                         hash_value = sess->Preauth_HashValue;
8531                         if (!hash_value)
8532                                 return;
8533                 }
8534                 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8535                                                  hash_value);
8536         }
8537 }
8538
8539 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8540 {
8541         struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8542         struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8543         unsigned int orig_len = get_rfc1002_len(old_buf);
8544
8545         /* tr_buf must be cleared by the caller */
8546         tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8547         tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8548         tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8549         if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8550             cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8551                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8552         else
8553                 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8554         memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8555         inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8556         inc_rfc1001_len(tr_buf, orig_len);
8557 }
8558
8559 int smb3_encrypt_resp(struct ksmbd_work *work)
8560 {
8561         struct kvec *iov = work->iov;
8562         int rc = -ENOMEM;
8563         void *tr_buf;
8564
8565         tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8566         if (!tr_buf)
8567                 return rc;
8568
8569         /* fill transform header */
8570         fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8571
8572         iov[0].iov_base = tr_buf;
8573         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8574         work->tr_buf = tr_buf;
8575
8576         return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8577 }
8578
8579 bool smb3_is_transform_hdr(void *buf)
8580 {
8581         struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8582
8583         return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8584 }
8585
8586 int smb3_decrypt_req(struct ksmbd_work *work)
8587 {
8588         struct ksmbd_session *sess;
8589         char *buf = work->request_buf;
8590         unsigned int pdu_length = get_rfc1002_len(buf);
8591         struct kvec iov[2];
8592         int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8593         struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8594         int rc = 0;
8595
8596         if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8597             buf_data_size < sizeof(struct smb2_hdr)) {
8598                 pr_err("Transform message is too small (%u)\n",
8599                        pdu_length);
8600                 return -ECONNABORTED;
8601         }
8602
8603         if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8604                 pr_err("Transform message is broken\n");
8605                 return -ECONNABORTED;
8606         }
8607
8608         sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8609         if (!sess) {
8610                 pr_err("invalid session id(%llx) in transform header\n",
8611                        le64_to_cpu(tr_hdr->SessionId));
8612                 return -ECONNABORTED;
8613         }
8614
8615         iov[0].iov_base = buf;
8616         iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8617         iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8618         iov[1].iov_len = buf_data_size;
8619         rc = ksmbd_crypt_message(work, iov, 2, 0);
8620         if (rc)
8621                 return rc;
8622
8623         memmove(buf + 4, iov[1].iov_base, buf_data_size);
8624         *(__be32 *)buf = cpu_to_be32(buf_data_size);
8625
8626         return rc;
8627 }
8628
8629 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8630 {
8631         struct ksmbd_conn *conn = work->conn;
8632         struct ksmbd_session *sess = work->sess;
8633         struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8634
8635         if (conn->dialect < SMB30_PROT_ID)
8636                 return false;
8637
8638         if (work->next_smb2_rcv_hdr_off)
8639                 rsp = ksmbd_resp_buf_next(work);
8640
8641         if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8642             sess->user && !user_guest(sess->user) &&
8643             rsp->Status == STATUS_SUCCESS)
8644                 return true;
8645         return false;
8646 }