fs/cifs/smb1ops.c

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This source file includes following definitions.
send_nt_cancel
cifs_compare_fids
cifs_read_data_offset
cifs_read_data_length
cifs_find_mid
cifs_add_credits
cifs_set_credits
cifs_get_credits_field
cifs_get_credits
cifs_get_next_mid
check2ndT2
coalesce_t2
cifs_downgrade_oplock
cifs_check_trans2
cifs_need_neg
cifs_negotiate
cifs_negotiate_wsize
cifs_negotiate_rsize
cifs_qfs_tcon
cifs_is_path_accessible
cifs_query_path_info
cifs_get_srv_inum
cifs_query_file_info
cifs_clear_stats
cifs_print_stats
cifs_mkdir_setinfo
cifs_open_file
cifs_set_fid
cifs_close_file
cifs_flush_file
cifs_sync_read
cifs_sync_write
smb_set_file_info
cifs_set_compression
cifs_query_dir_first
cifs_query_dir_next
cifs_close_dir
cifs_oplock_response
cifs_queryfs
cifs_mand_lock
cifs_unix_dfs_readlink
cifs_query_symlink
cifs_is_read_op
cifs_wp_retry_size
cifs_dir_needs_close
cifs_can_echo
cifs_make_node
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  SMB1 (CIFS) version specific operations
   4  *
   5  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   6  */
   7 
   8 #include <linux/pagemap.h>
   9 #include <linux/vfs.h>
  10 #include "cifsglob.h"
  11 #include "cifsproto.h"
  12 #include "cifs_debug.h"
  13 #include "cifspdu.h"
  14 #include "cifs_unicode.h"
  15 
  16 /*
  17  * An NT cancel request header looks just like the original request except:
  18  *
  19  * The Command is SMB_COM_NT_CANCEL
  20  * The WordCount is zeroed out
  21  * The ByteCount is zeroed out
  22  *
  23  * This function mangles an existing request buffer into a
  24  * SMB_COM_NT_CANCEL request and then sends it.
  25  */
  26 static int
  27 send_nt_cancel(struct TCP_Server_Info *server, struct smb_rqst *rqst,
  28                struct mid_q_entry *mid)
  29 {
  30         int rc = 0;
  31         struct smb_hdr *in_buf = (struct smb_hdr *)rqst->rq_iov[0].iov_base;
  32 
  33         /* -4 for RFC1001 length and +2 for BCC field */
  34         in_buf->smb_buf_length = cpu_to_be32(sizeof(struct smb_hdr) - 4  + 2);
  35         in_buf->Command = SMB_COM_NT_CANCEL;
  36         in_buf->WordCount = 0;
  37         put_bcc(0, in_buf);
  38 
  39         mutex_lock(&server->srv_mutex);
  40         rc = cifs_sign_smb(in_buf, server, &mid->sequence_number);
  41         if (rc) {
  42                 mutex_unlock(&server->srv_mutex);
  43                 return rc;
  44         }
  45 
  46         /*
  47          * The response to this call was already factored into the sequence
  48          * number when the call went out, so we must adjust it back downward
  49          * after signing here.
  50          */
  51         --server->sequence_number;
  52         rc = smb_send(server, in_buf, be32_to_cpu(in_buf->smb_buf_length));
  53         if (rc < 0)
  54                 server->sequence_number--;
  55 
  56         mutex_unlock(&server->srv_mutex);
  57 
  58         cifs_dbg(FYI, "issued NT_CANCEL for mid %u, rc = %d\n",
  59                  get_mid(in_buf), rc);
  60 
  61         return rc;
  62 }
  63 
  64 static bool
  65 cifs_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
  66 {
  67         return ob1->fid.netfid == ob2->fid.netfid;
  68 }
  69 
  70 static unsigned int
  71 cifs_read_data_offset(char *buf)
  72 {
  73         READ_RSP *rsp = (READ_RSP *)buf;
  74         return le16_to_cpu(rsp->DataOffset);
  75 }
  76 
  77 static unsigned int
  78 cifs_read_data_length(char *buf, bool in_remaining)
  79 {
  80         READ_RSP *rsp = (READ_RSP *)buf;
  81         /* It's a bug reading remaining data for SMB1 packets */
  82         WARN_ON(in_remaining);
  83         return (le16_to_cpu(rsp->DataLengthHigh) << 16) +
  84                le16_to_cpu(rsp->DataLength);
  85 }
  86 
  87 static struct mid_q_entry *
  88 cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
  89 {
  90         struct smb_hdr *buf = (struct smb_hdr *)buffer;
  91         struct mid_q_entry *mid;
  92 
  93         spin_lock(&GlobalMid_Lock);
  94         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
  95                 if (compare_mid(mid->mid, buf) &&
  96                     mid->mid_state == MID_REQUEST_SUBMITTED &&
  97                     le16_to_cpu(mid->command) == buf->Command) {
  98                         kref_get(&mid->refcount);
  99                         spin_unlock(&GlobalMid_Lock);
 100                         return mid;
 101                 }
 102         }
 103         spin_unlock(&GlobalMid_Lock);
 104         return NULL;
 105 }
 106 
 107 static void
 108 cifs_add_credits(struct TCP_Server_Info *server,
 109                  const struct cifs_credits *credits, const int optype)
 110 {
 111         spin_lock(&server->req_lock);
 112         server->credits += credits->value;
 113         server->in_flight--;
 114         spin_unlock(&server->req_lock);
 115         wake_up(&server->request_q);
 116 }
 117 
 118 static void
 119 cifs_set_credits(struct TCP_Server_Info *server, const int val)
 120 {
 121         spin_lock(&server->req_lock);
 122         server->credits = val;
 123         server->oplocks = val > 1 ? enable_oplocks : false;
 124         spin_unlock(&server->req_lock);
 125 }
 126 
 127 static int *
 128 cifs_get_credits_field(struct TCP_Server_Info *server, const int optype)
 129 {
 130         return &server->credits;
 131 }
 132 
 133 static unsigned int
 134 cifs_get_credits(struct mid_q_entry *mid)
 135 {
 136         return 1;
 137 }
 138 
 139 /*
 140  * Find a free multiplex id (SMB mid). Otherwise there could be
 141  * mid collisions which might cause problems, demultiplexing the
 142  * wrong response to this request. Multiplex ids could collide if
 143  * one of a series requests takes much longer than the others, or
 144  * if a very large number of long lived requests (byte range
 145  * locks or FindNotify requests) are pending. No more than
 146  * 64K-1 requests can be outstanding at one time. If no
 147  * mids are available, return zero. A future optimization
 148  * could make the combination of mids and uid the key we use
 149  * to demultiplex on (rather than mid alone).
 150  * In addition to the above check, the cifs demultiplex
 151  * code already used the command code as a secondary
 152  * check of the frame and if signing is negotiated the
 153  * response would be discarded if the mid were the same
 154  * but the signature was wrong. Since the mid is not put in the
 155  * pending queue until later (when it is about to be dispatched)
 156  * we do have to limit the number of outstanding requests
 157  * to somewhat less than 64K-1 although it is hard to imagine
 158  * so many threads being in the vfs at one time.
 159  */
 160 static __u64
 161 cifs_get_next_mid(struct TCP_Server_Info *server)
 162 {
 163         __u64 mid = 0;
 164         __u16 last_mid, cur_mid;
 165         bool collision;
 166 
 167         spin_lock(&GlobalMid_Lock);
 168 
 169         /* mid is 16 bit only for CIFS/SMB */
 170         cur_mid = (__u16)((server->CurrentMid) & 0xffff);
 171         /* we do not want to loop forever */
 172         last_mid = cur_mid;
 173         cur_mid++;
 174         /* avoid 0xFFFF MID */
 175         if (cur_mid == 0xffff)
 176                 cur_mid++;
 177 
 178         /*
 179          * This nested loop looks more expensive than it is.
 180          * In practice the list of pending requests is short,
 181          * fewer than 50, and the mids are likely to be unique
 182          * on the first pass through the loop unless some request
 183          * takes longer than the 64 thousand requests before it
 184          * (and it would also have to have been a request that
 185          * did not time out).
 186          */
 187         while (cur_mid != last_mid) {
 188                 struct mid_q_entry *mid_entry;
 189                 unsigned int num_mids;
 190 
 191                 collision = false;
 192                 if (cur_mid == 0)
 193                         cur_mid++;
 194 
 195                 num_mids = 0;
 196                 list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
 197                         ++num_mids;
 198                         if (mid_entry->mid == cur_mid &&
 199                             mid_entry->mid_state == MID_REQUEST_SUBMITTED) {
 200                                 /* This mid is in use, try a different one */
 201                                 collision = true;
 202                                 break;
 203                         }
 204                 }
 205 
 206                 /*
 207                  * if we have more than 32k mids in the list, then something
 208                  * is very wrong. Possibly a local user is trying to DoS the
 209                  * box by issuing long-running calls and SIGKILL'ing them. If
 210                  * we get to 2^16 mids then we're in big trouble as this
 211                  * function could loop forever.
 212                  *
 213                  * Go ahead and assign out the mid in this situation, but force
 214                  * an eventual reconnect to clean out the pending_mid_q.
 215                  */
 216                 if (num_mids > 32768)
 217                         server->tcpStatus = CifsNeedReconnect;
 218 
 219                 if (!collision) {
 220                         mid = (__u64)cur_mid;
 221                         server->CurrentMid = mid;
 222                         break;
 223                 }
 224                 cur_mid++;
 225         }
 226         spin_unlock(&GlobalMid_Lock);
 227         return mid;
 228 }
 229 
 230 /*
 231         return codes:
 232                 0       not a transact2, or all data present
 233                 >0      transact2 with that much data missing
 234                 -EINVAL invalid transact2
 235  */
 236 static int
 237 check2ndT2(char *buf)
 238 {
 239         struct smb_hdr *pSMB = (struct smb_hdr *)buf;
 240         struct smb_t2_rsp *pSMBt;
 241         int remaining;
 242         __u16 total_data_size, data_in_this_rsp;
 243 
 244         if (pSMB->Command != SMB_COM_TRANSACTION2)
 245                 return 0;
 246 
 247         /* check for plausible wct, bcc and t2 data and parm sizes */
 248         /* check for parm and data offset going beyond end of smb */
 249         if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 250                 cifs_dbg(FYI, "invalid transact2 word count\n");
 251                 return -EINVAL;
 252         }
 253 
 254         pSMBt = (struct smb_t2_rsp *)pSMB;
 255 
 256         total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
 257         data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
 258 
 259         if (total_data_size == data_in_this_rsp)
 260                 return 0;
 261         else if (total_data_size < data_in_this_rsp) {
 262                 cifs_dbg(FYI, "total data %d smaller than data in frame %d\n",
 263                          total_data_size, data_in_this_rsp);
 264                 return -EINVAL;
 265         }
 266 
 267         remaining = total_data_size - data_in_this_rsp;
 268 
 269         cifs_dbg(FYI, "missing %d bytes from transact2, check next response\n",
 270                  remaining);
 271         if (total_data_size > CIFSMaxBufSize) {
 272                 cifs_dbg(VFS, "TotalDataSize %d is over maximum buffer %d\n",
 273                          total_data_size, CIFSMaxBufSize);
 274                 return -EINVAL;
 275         }
 276         return remaining;
 277 }
 278 
 279 static int
 280 coalesce_t2(char *second_buf, struct smb_hdr *target_hdr)
 281 {
 282         struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf;
 283         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)target_hdr;
 284         char *data_area_of_tgt;
 285         char *data_area_of_src;
 286         int remaining;
 287         unsigned int byte_count, total_in_tgt;
 288         __u16 tgt_total_cnt, src_total_cnt, total_in_src;
 289 
 290         src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount);
 291         tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount);
 292 
 293         if (tgt_total_cnt != src_total_cnt)
 294                 cifs_dbg(FYI, "total data count of primary and secondary t2 differ source=%hu target=%hu\n",
 295                          src_total_cnt, tgt_total_cnt);
 296 
 297         total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount);
 298 
 299         remaining = tgt_total_cnt - total_in_tgt;
 300 
 301         if (remaining < 0) {
 302                 cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%u\n",
 303                          tgt_total_cnt, total_in_tgt);
 304                 return -EPROTO;
 305         }
 306 
 307         if (remaining == 0) {
 308                 /* nothing to do, ignore */
 309                 cifs_dbg(FYI, "no more data remains\n");
 310                 return 0;
 311         }
 312 
 313         total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount);
 314         if (remaining < total_in_src)
 315                 cifs_dbg(FYI, "transact2 2nd response contains too much data\n");
 316 
 317         /* find end of first SMB data area */
 318         data_area_of_tgt = (char *)&pSMBt->hdr.Protocol +
 319                                 get_unaligned_le16(&pSMBt->t2_rsp.DataOffset);
 320 
 321         /* validate target area */
 322         data_area_of_src = (char *)&pSMBs->hdr.Protocol +
 323                                 get_unaligned_le16(&pSMBs->t2_rsp.DataOffset);
 324 
 325         data_area_of_tgt += total_in_tgt;
 326 
 327         total_in_tgt += total_in_src;
 328         /* is the result too big for the field? */
 329         if (total_in_tgt > USHRT_MAX) {
 330                 cifs_dbg(FYI, "coalesced DataCount too large (%u)\n",
 331                          total_in_tgt);
 332                 return -EPROTO;
 333         }
 334         put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount);
 335 
 336         /* fix up the BCC */
 337         byte_count = get_bcc(target_hdr);
 338         byte_count += total_in_src;
 339         /* is the result too big for the field? */
 340         if (byte_count > USHRT_MAX) {
 341                 cifs_dbg(FYI, "coalesced BCC too large (%u)\n", byte_count);
 342                 return -EPROTO;
 343         }
 344         put_bcc(byte_count, target_hdr);
 345 
 346         byte_count = be32_to_cpu(target_hdr->smb_buf_length);
 347         byte_count += total_in_src;
 348         /* don't allow buffer to overflow */
 349         if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
 350                 cifs_dbg(FYI, "coalesced BCC exceeds buffer size (%u)\n",
 351                          byte_count);
 352                 return -ENOBUFS;
 353         }
 354         target_hdr->smb_buf_length = cpu_to_be32(byte_count);
 355 
 356         /* copy second buffer into end of first buffer */
 357         memcpy(data_area_of_tgt, data_area_of_src, total_in_src);
 358 
 359         if (remaining != total_in_src) {
 360                 /* more responses to go */
 361                 cifs_dbg(FYI, "waiting for more secondary responses\n");
 362                 return 1;
 363         }
 364 
 365         /* we are done */
 366         cifs_dbg(FYI, "found the last secondary response\n");
 367         return 0;
 368 }
 369 
 370 static void
 371 cifs_downgrade_oplock(struct TCP_Server_Info *server,
 372                         struct cifsInodeInfo *cinode, bool set_level2)
 373 {
 374         if (set_level2)
 375                 cifs_set_oplock_level(cinode, OPLOCK_READ);
 376         else
 377                 cifs_set_oplock_level(cinode, 0);
 378 }
 379 
 380 static bool
 381 cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server,
 382                   char *buf, int malformed)
 383 {
 384         if (malformed)
 385                 return false;
 386         if (check2ndT2(buf) <= 0)
 387                 return false;
 388         mid->multiRsp = true;
 389         if (mid->resp_buf) {
 390                 /* merge response - fix up 1st*/
 391                 malformed = coalesce_t2(buf, mid->resp_buf);
 392                 if (malformed > 0)
 393                         return true;
 394                 /* All parts received or packet is malformed. */
 395                 mid->multiEnd = true;
 396                 dequeue_mid(mid, malformed);
 397                 return true;
 398         }
 399         if (!server->large_buf) {
 400                 /*FIXME: switch to already allocated largebuf?*/
 401                 cifs_dbg(VFS, "1st trans2 resp needs bigbuf\n");
 402         } else {
 403                 /* Have first buffer */
 404                 mid->resp_buf = buf;
 405                 mid->large_buf = true;
 406                 server->bigbuf = NULL;
 407         }
 408         return true;
 409 }
 410 
 411 static bool
 412 cifs_need_neg(struct TCP_Server_Info *server)
 413 {
 414         return server->maxBuf == 0;
 415 }
 416 
 417 static int
 418 cifs_negotiate(const unsigned int xid, struct cifs_ses *ses)
 419 {
 420         int rc;
 421         rc = CIFSSMBNegotiate(xid, ses);
 422         if (rc == -EAGAIN) {
 423                 /* retry only once on 1st time connection */
 424                 set_credits(ses->server, 1);
 425                 rc = CIFSSMBNegotiate(xid, ses);
 426                 if (rc == -EAGAIN)
 427                         rc = -EHOSTDOWN;
 428         }
 429         return rc;
 430 }
 431 
 432 static unsigned int
 433 cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 434 {
 435         __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
 436         struct TCP_Server_Info *server = tcon->ses->server;
 437         unsigned int wsize;
 438 
 439         /* start with specified wsize, or default */
 440         if (volume_info->wsize)
 441                 wsize = volume_info->wsize;
 442         else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
 443                 wsize = CIFS_DEFAULT_IOSIZE;
 444         else
 445                 wsize = CIFS_DEFAULT_NON_POSIX_WSIZE;
 446 
 447         /* can server support 24-bit write sizes? (via UNIX extensions) */
 448         if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
 449                 wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE);
 450 
 451         /*
 452          * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set?
 453          * Limit it to max buffer offered by the server, minus the size of the
 454          * WRITEX header, not including the 4 byte RFC1001 length.
 455          */
 456         if (!(server->capabilities & CAP_LARGE_WRITE_X) ||
 457             (!(server->capabilities & CAP_UNIX) && server->sign))
 458                 wsize = min_t(unsigned int, wsize,
 459                                 server->maxBuf - sizeof(WRITE_REQ) + 4);
 460 
 461         /* hard limit of CIFS_MAX_WSIZE */
 462         wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE);
 463 
 464         return wsize;
 465 }
 466 
 467 static unsigned int
 468 cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 469 {
 470         __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
 471         struct TCP_Server_Info *server = tcon->ses->server;
 472         unsigned int rsize, defsize;
 473 
 474         /*
 475          * Set default value...
 476          *
 477          * HACK alert! Ancient servers have very small buffers. Even though
 478          * MS-CIFS indicates that servers are only limited by the client's
 479          * bufsize for reads, testing against win98se shows that it throws
 480          * INVALID_PARAMETER errors if you try to request too large a read.
 481          * OS/2 just sends back short reads.
 482          *
 483          * If the server doesn't advertise CAP_LARGE_READ_X, then assume that
 484          * it can't handle a read request larger than its MaxBufferSize either.
 485          */
 486         if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP))
 487                 defsize = CIFS_DEFAULT_IOSIZE;
 488         else if (server->capabilities & CAP_LARGE_READ_X)
 489                 defsize = CIFS_DEFAULT_NON_POSIX_RSIZE;
 490         else
 491                 defsize = server->maxBuf - sizeof(READ_RSP);
 492 
 493         rsize = volume_info->rsize ? volume_info->rsize : defsize;
 494 
 495         /*
 496          * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to
 497          * the client's MaxBufferSize.
 498          */
 499         if (!(server->capabilities & CAP_LARGE_READ_X))
 500                 rsize = min_t(unsigned int, CIFSMaxBufSize, rsize);
 501 
 502         /* hard limit of CIFS_MAX_RSIZE */
 503         rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE);
 504 
 505         return rsize;
 506 }
 507 
 508 static void
 509 cifs_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 510 {
 511         CIFSSMBQFSDeviceInfo(xid, tcon);
 512         CIFSSMBQFSAttributeInfo(xid, tcon);
 513 }
 514 
 515 static int
 516 cifs_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 517                         struct cifs_sb_info *cifs_sb, const char *full_path)
 518 {
 519         int rc;
 520         FILE_ALL_INFO *file_info;
 521 
 522         file_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
 523         if (file_info == NULL)
 524                 return -ENOMEM;
 525 
 526         rc = CIFSSMBQPathInfo(xid, tcon, full_path, file_info,
 527                               0 /* not legacy */, cifs_sb->local_nls,
 528                               cifs_remap(cifs_sb));
 529 
 530         if (rc == -EOPNOTSUPP || rc == -EINVAL)
 531                 rc = SMBQueryInformation(xid, tcon, full_path, file_info,
 532                                 cifs_sb->local_nls, cifs_remap(cifs_sb));
 533         kfree(file_info);
 534         return rc;
 535 }
 536 
 537 static int
 538 cifs_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 539                      struct cifs_sb_info *cifs_sb, const char *full_path,
 540                      FILE_ALL_INFO *data, bool *adjustTZ, bool *symlink)
 541 {
 542         int rc;
 543 
 544         *symlink = false;
 545 
 546         /* could do find first instead but this returns more info */
 547         rc = CIFSSMBQPathInfo(xid, tcon, full_path, data, 0 /* not legacy */,
 548                               cifs_sb->local_nls, cifs_remap(cifs_sb));
 549         /*
 550          * BB optimize code so we do not make the above call when server claims
 551          * no NT SMB support and the above call failed at least once - set flag
 552          * in tcon or mount.
 553          */
 554         if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
 555                 rc = SMBQueryInformation(xid, tcon, full_path, data,
 556                                          cifs_sb->local_nls,
 557                                          cifs_remap(cifs_sb));
 558                 *adjustTZ = true;
 559         }
 560 
 561         if (!rc && (le32_to_cpu(data->Attributes) & ATTR_REPARSE)) {
 562                 int tmprc;
 563                 int oplock = 0;
 564                 struct cifs_fid fid;
 565                 struct cifs_open_parms oparms;
 566 
 567                 oparms.tcon = tcon;
 568                 oparms.cifs_sb = cifs_sb;
 569                 oparms.desired_access = FILE_READ_ATTRIBUTES;
 570                 oparms.create_options = 0;
 571                 oparms.disposition = FILE_OPEN;
 572                 oparms.path = full_path;
 573                 oparms.fid = &fid;
 574                 oparms.reconnect = false;
 575 
 576                 /* Need to check if this is a symbolic link or not */
 577                 tmprc = CIFS_open(xid, &oparms, &oplock, NULL);
 578                 if (tmprc == -EOPNOTSUPP)
 579                         *symlink = true;
 580                 else if (tmprc == 0)
 581                         CIFSSMBClose(xid, tcon, fid.netfid);
 582         }
 583 
 584         return rc;
 585 }
 586 
 587 static int
 588 cifs_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 589                   struct cifs_sb_info *cifs_sb, const char *full_path,
 590                   u64 *uniqueid, FILE_ALL_INFO *data)
 591 {
 592         /*
 593          * We can not use the IndexNumber field by default from Windows or
 594          * Samba (in ALL_INFO buf) but we can request it explicitly. The SNIA
 595          * CIFS spec claims that this value is unique within the scope of a
 596          * share, and the windows docs hint that it's actually unique
 597          * per-machine.
 598          *
 599          * There may be higher info levels that work but are there Windows
 600          * server or network appliances for which IndexNumber field is not
 601          * guaranteed unique?
 602          */
 603         return CIFSGetSrvInodeNumber(xid, tcon, full_path, uniqueid,
 604                                      cifs_sb->local_nls,
 605                                      cifs_remap(cifs_sb));
 606 }
 607 
 608 static int
 609 cifs_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 610                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 611 {
 612         return CIFSSMBQFileInfo(xid, tcon, fid->netfid, data);
 613 }
 614 
 615 static void
 616 cifs_clear_stats(struct cifs_tcon *tcon)
 617 {
 618         atomic_set(&tcon->stats.cifs_stats.num_writes, 0);
 619         atomic_set(&tcon->stats.cifs_stats.num_reads, 0);
 620         atomic_set(&tcon->stats.cifs_stats.num_flushes, 0);
 621         atomic_set(&tcon->stats.cifs_stats.num_oplock_brks, 0);
 622         atomic_set(&tcon->stats.cifs_stats.num_opens, 0);
 623         atomic_set(&tcon->stats.cifs_stats.num_posixopens, 0);
 624         atomic_set(&tcon->stats.cifs_stats.num_posixmkdirs, 0);
 625         atomic_set(&tcon->stats.cifs_stats.num_closes, 0);
 626         atomic_set(&tcon->stats.cifs_stats.num_deletes, 0);
 627         atomic_set(&tcon->stats.cifs_stats.num_mkdirs, 0);
 628         atomic_set(&tcon->stats.cifs_stats.num_rmdirs, 0);
 629         atomic_set(&tcon->stats.cifs_stats.num_renames, 0);
 630         atomic_set(&tcon->stats.cifs_stats.num_t2renames, 0);
 631         atomic_set(&tcon->stats.cifs_stats.num_ffirst, 0);
 632         atomic_set(&tcon->stats.cifs_stats.num_fnext, 0);
 633         atomic_set(&tcon->stats.cifs_stats.num_fclose, 0);
 634         atomic_set(&tcon->stats.cifs_stats.num_hardlinks, 0);
 635         atomic_set(&tcon->stats.cifs_stats.num_symlinks, 0);
 636         atomic_set(&tcon->stats.cifs_stats.num_locks, 0);
 637         atomic_set(&tcon->stats.cifs_stats.num_acl_get, 0);
 638         atomic_set(&tcon->stats.cifs_stats.num_acl_set, 0);
 639 }
 640 
 641 static void
 642 cifs_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 643 {
 644         seq_printf(m, " Oplocks breaks: %d",
 645                    atomic_read(&tcon->stats.cifs_stats.num_oplock_brks));
 646         seq_printf(m, "\nReads:  %d Bytes: %llu",
 647                    atomic_read(&tcon->stats.cifs_stats.num_reads),
 648                    (long long)(tcon->bytes_read));
 649         seq_printf(m, "\nWrites: %d Bytes: %llu",
 650                    atomic_read(&tcon->stats.cifs_stats.num_writes),
 651                    (long long)(tcon->bytes_written));
 652         seq_printf(m, "\nFlushes: %d",
 653                    atomic_read(&tcon->stats.cifs_stats.num_flushes));
 654         seq_printf(m, "\nLocks: %d HardLinks: %d Symlinks: %d",
 655                    atomic_read(&tcon->stats.cifs_stats.num_locks),
 656                    atomic_read(&tcon->stats.cifs_stats.num_hardlinks),
 657                    atomic_read(&tcon->stats.cifs_stats.num_symlinks));
 658         seq_printf(m, "\nOpens: %d Closes: %d Deletes: %d",
 659                    atomic_read(&tcon->stats.cifs_stats.num_opens),
 660                    atomic_read(&tcon->stats.cifs_stats.num_closes),
 661                    atomic_read(&tcon->stats.cifs_stats.num_deletes));
 662         seq_printf(m, "\nPosix Opens: %d Posix Mkdirs: %d",
 663                    atomic_read(&tcon->stats.cifs_stats.num_posixopens),
 664                    atomic_read(&tcon->stats.cifs_stats.num_posixmkdirs));
 665         seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
 666                    atomic_read(&tcon->stats.cifs_stats.num_mkdirs),
 667                    atomic_read(&tcon->stats.cifs_stats.num_rmdirs));
 668         seq_printf(m, "\nRenames: %d T2 Renames %d",
 669                    atomic_read(&tcon->stats.cifs_stats.num_renames),
 670                    atomic_read(&tcon->stats.cifs_stats.num_t2renames));
 671         seq_printf(m, "\nFindFirst: %d FNext %d FClose %d",
 672                    atomic_read(&tcon->stats.cifs_stats.num_ffirst),
 673                    atomic_read(&tcon->stats.cifs_stats.num_fnext),
 674                    atomic_read(&tcon->stats.cifs_stats.num_fclose));
 675 }
 676 
 677 static void
 678 cifs_mkdir_setinfo(struct inode *inode, const char *full_path,
 679                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 680                    const unsigned int xid)
 681 {
 682         FILE_BASIC_INFO info;
 683         struct cifsInodeInfo *cifsInode;
 684         u32 dosattrs;
 685         int rc;
 686 
 687         memset(&info, 0, sizeof(info));
 688         cifsInode = CIFS_I(inode);
 689         dosattrs = cifsInode->cifsAttrs|ATTR_READONLY;
 690         info.Attributes = cpu_to_le32(dosattrs);
 691         rc = CIFSSMBSetPathInfo(xid, tcon, full_path, &info, cifs_sb->local_nls,
 692                                 cifs_remap(cifs_sb));
 693         if (rc == 0)
 694                 cifsInode->cifsAttrs = dosattrs;
 695 }
 696 
 697 static int
 698 cifs_open_file(const unsigned int xid, struct cifs_open_parms *oparms,
 699                __u32 *oplock, FILE_ALL_INFO *buf)
 700 {
 701         if (!(oparms->tcon->ses->capabilities & CAP_NT_SMBS))
 702                 return SMBLegacyOpen(xid, oparms->tcon, oparms->path,
 703                                      oparms->disposition,
 704                                      oparms->desired_access,
 705                                      oparms->create_options,
 706                                      &oparms->fid->netfid, oplock, buf,
 707                                      oparms->cifs_sb->local_nls,
 708                                      cifs_remap(oparms->cifs_sb));
 709         return CIFS_open(xid, oparms, oplock, buf);
 710 }
 711 
 712 static void
 713 cifs_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 714 {
 715         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 716         cfile->fid.netfid = fid->netfid;
 717         cifs_set_oplock_level(cinode, oplock);
 718         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 719 }
 720 
 721 static void
 722 cifs_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 723                 struct cifs_fid *fid)
 724 {
 725         CIFSSMBClose(xid, tcon, fid->netfid);
 726 }
 727 
 728 static int
 729 cifs_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 730                 struct cifs_fid *fid)
 731 {
 732         return CIFSSMBFlush(xid, tcon, fid->netfid);
 733 }
 734 
 735 static int
 736 cifs_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 737                struct cifs_io_parms *parms, unsigned int *bytes_read,
 738                char **buf, int *buf_type)
 739 {
 740         parms->netfid = pfid->netfid;
 741         return CIFSSMBRead(xid, parms, bytes_read, buf, buf_type);
 742 }
 743 
 744 static int
 745 cifs_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 746                 struct cifs_io_parms *parms, unsigned int *written,
 747                 struct kvec *iov, unsigned long nr_segs)
 748 {
 749 
 750         parms->netfid = pfid->netfid;
 751         return CIFSSMBWrite2(xid, parms, written, iov, nr_segs);
 752 }
 753 
 754 static int
 755 smb_set_file_info(struct inode *inode, const char *full_path,
 756                   FILE_BASIC_INFO *buf, const unsigned int xid)
 757 {
 758         int oplock = 0;
 759         int rc;
 760         __u32 netpid;
 761         struct cifs_fid fid;
 762         struct cifs_open_parms oparms;
 763         struct cifsFileInfo *open_file;
 764         struct cifsInodeInfo *cinode = CIFS_I(inode);
 765         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 766         struct tcon_link *tlink = NULL;
 767         struct cifs_tcon *tcon;
 768 
 769         /* if the file is already open for write, just use that fileid */
 770         open_file = find_writable_file(cinode, FIND_WR_FSUID_ONLY);
 771         if (open_file) {
 772                 fid.netfid = open_file->fid.netfid;
 773                 netpid = open_file->pid;
 774                 tcon = tlink_tcon(open_file->tlink);
 775                 goto set_via_filehandle;
 776         }
 777 
 778         tlink = cifs_sb_tlink(cifs_sb);
 779         if (IS_ERR(tlink)) {
 780                 rc = PTR_ERR(tlink);
 781                 tlink = NULL;
 782                 goto out;
 783         }
 784         tcon = tlink_tcon(tlink);
 785 
 786         rc = CIFSSMBSetPathInfo(xid, tcon, full_path, buf, cifs_sb->local_nls,
 787                                 cifs_remap(cifs_sb));
 788         if (rc == 0) {
 789                 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
 790                 goto out;
 791         } else if (rc != -EOPNOTSUPP && rc != -EINVAL) {
 792                 goto out;
 793         }
 794 
 795         oparms.tcon = tcon;
 796         oparms.cifs_sb = cifs_sb;
 797         oparms.desired_access = SYNCHRONIZE | FILE_WRITE_ATTRIBUTES;
 798         oparms.create_options = CREATE_NOT_DIR;
 799         oparms.disposition = FILE_OPEN;
 800         oparms.path = full_path;
 801         oparms.fid = &fid;
 802         oparms.reconnect = false;
 803 
 804         cifs_dbg(FYI, "calling SetFileInfo since SetPathInfo for times not supported by this server\n");
 805         rc = CIFS_open(xid, &oparms, &oplock, NULL);
 806         if (rc != 0) {
 807                 if (rc == -EIO)
 808                         rc = -EINVAL;
 809                 goto out;
 810         }
 811 
 812         netpid = current->tgid;
 813 
 814 set_via_filehandle:
 815         rc = CIFSSMBSetFileInfo(xid, tcon, buf, fid.netfid, netpid);
 816         if (!rc)
 817                 cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
 818 
 819         if (open_file == NULL)
 820                 CIFSSMBClose(xid, tcon, fid.netfid);
 821         else
 822                 cifsFileInfo_put(open_file);
 823 out:
 824         if (tlink != NULL)
 825                 cifs_put_tlink(tlink);
 826         return rc;
 827 }
 828 
 829 static int
 830 cifs_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 831                    struct cifsFileInfo *cfile)
 832 {
 833         return CIFSSMB_set_compression(xid, tcon, cfile->fid.netfid);
 834 }
 835 
 836 static int
 837 cifs_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 838                      const char *path, struct cifs_sb_info *cifs_sb,
 839                      struct cifs_fid *fid, __u16 search_flags,
 840                      struct cifs_search_info *srch_inf)
 841 {
 842         int rc;
 843 
 844         rc = CIFSFindFirst(xid, tcon, path, cifs_sb,
 845                            &fid->netfid, search_flags, srch_inf, true);
 846         if (rc)
 847                 cifs_dbg(FYI, "find first failed=%d\n", rc);
 848         return rc;
 849 }
 850 
 851 static int
 852 cifs_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 853                     struct cifs_fid *fid, __u16 search_flags,
 854                     struct cifs_search_info *srch_inf)
 855 {
 856         return CIFSFindNext(xid, tcon, fid->netfid, search_flags, srch_inf);
 857 }
 858 
 859 static int
 860 cifs_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 861                struct cifs_fid *fid)
 862 {
 863         return CIFSFindClose(xid, tcon, fid->netfid);
 864 }
 865 
 866 static int
 867 cifs_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 868                      struct cifsInodeInfo *cinode)
 869 {
 870         return CIFSSMBLock(0, tcon, fid->netfid, current->tgid, 0, 0, 0, 0,
 871                            LOCKING_ANDX_OPLOCK_RELEASE, false,
 872                            CIFS_CACHE_READ(cinode) ? 1 : 0);
 873 }
 874 
 875 static int
 876 cifs_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 877              struct kstatfs *buf)
 878 {
 879         int rc = -EOPNOTSUPP;
 880 
 881         buf->f_type = CIFS_MAGIC_NUMBER;
 882 
 883         /*
 884          * We could add a second check for a QFS Unix capability bit
 885          */
 886         if ((tcon->ses->capabilities & CAP_UNIX) &&
 887             (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
 888                 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
 889 
 890         /*
 891          * Only need to call the old QFSInfo if failed on newer one,
 892          * e.g. by OS/2.
 893          **/
 894         if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
 895                 rc = CIFSSMBQFSInfo(xid, tcon, buf);
 896 
 897         /*
 898          * Some old Windows servers also do not support level 103, retry with
 899          * older level one if old server failed the previous call or we
 900          * bypassed it because we detected that this was an older LANMAN sess
 901          */
 902         if (rc)
 903                 rc = SMBOldQFSInfo(xid, tcon, buf);
 904         return rc;
 905 }
 906 
 907 static int
 908 cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 909                __u64 length, __u32 type, int lock, int unlock, bool wait)
 910 {
 911         return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->fid.netfid,
 912                            current->tgid, length, offset, unlock, lock,
 913                            (__u8)type, wait, 0);
 914 }
 915 
 916 static int
 917 cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon,
 918                        const unsigned char *searchName, char **symlinkinfo,
 919                        const struct nls_table *nls_codepage)
 920 {
 921 #ifdef CONFIG_CIFS_DFS_UPCALL
 922         int rc;
 923         struct dfs_info3_param referral = {0};
 924 
 925         rc = get_dfs_path(xid, tcon->ses, searchName, nls_codepage, &referral,
 926                           0);
 927 
 928         if (!rc) {
 929                 *symlinkinfo = kstrndup(referral.node_name,
 930                                         strlen(referral.node_name),
 931                                         GFP_KERNEL);
 932                 free_dfs_info_param(&referral);
 933                 if (!*symlinkinfo)
 934                         rc = -ENOMEM;
 935         }
 936         return rc;
 937 #else /* No DFS support */
 938         return -EREMOTE;
 939 #endif
 940 }
 941 
 942 static int
 943 cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
 944                    struct cifs_sb_info *cifs_sb, const char *full_path,
 945                    char **target_path, bool is_reparse_point)
 946 {
 947         int rc;
 948         int oplock = 0;
 949         struct cifs_fid fid;
 950         struct cifs_open_parms oparms;
 951 
 952         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
 953 
 954         if (is_reparse_point) {
 955                 cifs_dbg(VFS, "reparse points not handled for SMB1 symlinks\n");
 956                 return -EOPNOTSUPP;
 957         }
 958 
 959         /* Check for unix extensions */
 960         if (cap_unix(tcon->ses)) {
 961                 rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path,
 962                                              cifs_sb->local_nls,
 963                                              cifs_remap(cifs_sb));
 964                 if (rc == -EREMOTE)
 965                         rc = cifs_unix_dfs_readlink(xid, tcon, full_path,
 966                                                     target_path,
 967                                                     cifs_sb->local_nls);
 968 
 969                 goto out;
 970         }
 971 
 972         oparms.tcon = tcon;
 973         oparms.cifs_sb = cifs_sb;
 974         oparms.desired_access = FILE_READ_ATTRIBUTES;
 975         oparms.create_options = OPEN_REPARSE_POINT;
 976         oparms.disposition = FILE_OPEN;
 977         oparms.path = full_path;
 978         oparms.fid = &fid;
 979         oparms.reconnect = false;
 980 
 981         rc = CIFS_open(xid, &oparms, &oplock, NULL);
 982         if (rc)
 983                 goto out;
 984 
 985         rc = CIFSSMBQuerySymLink(xid, tcon, fid.netfid, target_path,
 986                                  cifs_sb->local_nls);
 987         if (rc)
 988                 goto out_close;
 989 
 990         convert_delimiter(*target_path, '/');
 991 out_close:
 992         CIFSSMBClose(xid, tcon, fid.netfid);
 993 out:
 994         if (!rc)
 995                 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
 996         return rc;
 997 }
 998 
 999 static bool
1000 cifs_is_read_op(__u32 oplock)
1001 {
1002         return oplock == OPLOCK_READ;
1003 }
1004 
1005 static unsigned int
1006 cifs_wp_retry_size(struct inode *inode)
1007 {
1008         return CIFS_SB(inode->i_sb)->wsize;
1009 }
1010 
1011 static bool
1012 cifs_dir_needs_close(struct cifsFileInfo *cfile)
1013 {
1014         return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle;
1015 }
1016 
1017 static bool
1018 cifs_can_echo(struct TCP_Server_Info *server)
1019 {
1020         if (server->tcpStatus == CifsGood)
1021                 return true;
1022 
1023         return false;
1024 }
1025 
1026 static int
1027 cifs_make_node(unsigned int xid, struct inode *inode,
1028                struct dentry *dentry, struct cifs_tcon *tcon,
1029                char *full_path, umode_t mode, dev_t dev)
1030 {
1031         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1032         struct inode *newinode = NULL;
1033         int rc = -EPERM;
1034         int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
1035         FILE_ALL_INFO *buf = NULL;
1036         struct cifs_io_parms io_parms;
1037         __u32 oplock = 0;
1038         struct cifs_fid fid;
1039         struct cifs_open_parms oparms;
1040         unsigned int bytes_written;
1041         struct win_dev *pdev;
1042         struct kvec iov[2];
1043 
1044         if (tcon->unix_ext) {
1045                 /*
1046                  * SMB1 Unix Extensions: requires server support but
1047                  * works with all special files
1048                  */
1049                 struct cifs_unix_set_info_args args = {
1050                         .mode   = mode & ~current_umask(),
1051                         .ctime  = NO_CHANGE_64,
1052                         .atime  = NO_CHANGE_64,
1053                         .mtime  = NO_CHANGE_64,
1054                         .device = dev,
1055                 };
1056                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1057                         args.uid = current_fsuid();
1058                         args.gid = current_fsgid();
1059                 } else {
1060                         args.uid = INVALID_UID; /* no change */
1061                         args.gid = INVALID_GID; /* no change */
1062                 }
1063                 rc = CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
1064                                             cifs_sb->local_nls,
1065                                             cifs_remap(cifs_sb));
1066                 if (rc)
1067                         goto out;
1068 
1069                 rc = cifs_get_inode_info_unix(&newinode, full_path,
1070                                               inode->i_sb, xid);
1071 
1072                 if (rc == 0)
1073                         d_instantiate(dentry, newinode);
1074                 goto out;
1075         }
1076 
1077         /*
1078          * SMB1 SFU emulation: should work with all servers, but only
1079          * support block and char device (no socket & fifo)
1080          */
1081         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
1082                 goto out;
1083 
1084         if (!S_ISCHR(mode) && !S_ISBLK(mode))
1085                 goto out;
1086 
1087         cifs_dbg(FYI, "sfu compat create special file\n");
1088 
1089         buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
1090         if (buf == NULL) {
1091                 rc = -ENOMEM;
1092                 goto out;
1093         }
1094 
1095         if (backup_cred(cifs_sb))
1096                 create_options |= CREATE_OPEN_BACKUP_INTENT;
1097 
1098         oparms.tcon = tcon;
1099         oparms.cifs_sb = cifs_sb;
1100         oparms.desired_access = GENERIC_WRITE;
1101         oparms.create_options = create_options;
1102         oparms.disposition = FILE_CREATE;
1103         oparms.path = full_path;
1104         oparms.fid = &fid;
1105         oparms.reconnect = false;
1106 
1107         if (tcon->ses->server->oplocks)
1108                 oplock = REQ_OPLOCK;
1109         else
1110                 oplock = 0;
1111         rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
1112         if (rc)
1113                 goto out;
1114 
1115         /*
1116          * BB Do not bother to decode buf since no local inode yet to put
1117          * timestamps in, but we can reuse it safely.
1118          */
1119 
1120         pdev = (struct win_dev *)buf;
1121         io_parms.pid = current->tgid;
1122         io_parms.tcon = tcon;
1123         io_parms.offset = 0;
1124         io_parms.length = sizeof(struct win_dev);
1125         iov[1].iov_base = buf;
1126         iov[1].iov_len = sizeof(struct win_dev);
1127         if (S_ISCHR(mode)) {
1128                 memcpy(pdev->type, "IntxCHR", 8);
1129                 pdev->major = cpu_to_le64(MAJOR(dev));
1130                 pdev->minor = cpu_to_le64(MINOR(dev));
1131                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
1132                                                         &bytes_written, iov, 1);
1133         } else if (S_ISBLK(mode)) {
1134                 memcpy(pdev->type, "IntxBLK", 8);
1135                 pdev->major = cpu_to_le64(MAJOR(dev));
1136                 pdev->minor = cpu_to_le64(MINOR(dev));
1137                 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
1138                                                         &bytes_written, iov, 1);
1139         }
1140         tcon->ses->server->ops->close(xid, tcon, &fid);
1141         d_drop(dentry);
1142 
1143         /* FIXME: add code here to set EAs */
1144 out:
1145         kfree(buf);
1146         return rc;
1147 }
1148 
1149 
1150 
1151 struct smb_version_operations smb1_operations = {
1152         .send_cancel = send_nt_cancel,
1153         .compare_fids = cifs_compare_fids,
1154         .setup_request = cifs_setup_request,
1155         .setup_async_request = cifs_setup_async_request,
1156         .check_receive = cifs_check_receive,
1157         .add_credits = cifs_add_credits,
1158         .set_credits = cifs_set_credits,
1159         .get_credits_field = cifs_get_credits_field,
1160         .get_credits = cifs_get_credits,
1161         .wait_mtu_credits = cifs_wait_mtu_credits,
1162         .get_next_mid = cifs_get_next_mid,
1163         .read_data_offset = cifs_read_data_offset,
1164         .read_data_length = cifs_read_data_length,
1165         .map_error = map_smb_to_linux_error,
1166         .find_mid = cifs_find_mid,
1167         .check_message = checkSMB,
1168         .dump_detail = cifs_dump_detail,
1169         .clear_stats = cifs_clear_stats,
1170         .print_stats = cifs_print_stats,
1171         .is_oplock_break = is_valid_oplock_break,
1172         .downgrade_oplock = cifs_downgrade_oplock,
1173         .check_trans2 = cifs_check_trans2,
1174         .need_neg = cifs_need_neg,
1175         .negotiate = cifs_negotiate,
1176         .negotiate_wsize = cifs_negotiate_wsize,
1177         .negotiate_rsize = cifs_negotiate_rsize,
1178         .sess_setup = CIFS_SessSetup,
1179         .logoff = CIFSSMBLogoff,
1180         .tree_connect = CIFSTCon,
1181         .tree_disconnect = CIFSSMBTDis,
1182         .get_dfs_refer = CIFSGetDFSRefer,
1183         .qfs_tcon = cifs_qfs_tcon,
1184         .is_path_accessible = cifs_is_path_accessible,
1185         .can_echo = cifs_can_echo,
1186         .query_path_info = cifs_query_path_info,
1187         .query_file_info = cifs_query_file_info,
1188         .get_srv_inum = cifs_get_srv_inum,
1189         .set_path_size = CIFSSMBSetEOF,
1190         .set_file_size = CIFSSMBSetFileSize,
1191         .set_file_info = smb_set_file_info,
1192         .set_compression = cifs_set_compression,
1193         .echo = CIFSSMBEcho,
1194         .mkdir = CIFSSMBMkDir,
1195         .mkdir_setinfo = cifs_mkdir_setinfo,
1196         .rmdir = CIFSSMBRmDir,
1197         .unlink = CIFSSMBDelFile,
1198         .rename_pending_delete = cifs_rename_pending_delete,
1199         .rename = CIFSSMBRename,
1200         .create_hardlink = CIFSCreateHardLink,
1201         .query_symlink = cifs_query_symlink,
1202         .open = cifs_open_file,
1203         .set_fid = cifs_set_fid,
1204         .close = cifs_close_file,
1205         .flush = cifs_flush_file,
1206         .async_readv = cifs_async_readv,
1207         .async_writev = cifs_async_writev,
1208         .sync_read = cifs_sync_read,
1209         .sync_write = cifs_sync_write,
1210         .query_dir_first = cifs_query_dir_first,
1211         .query_dir_next = cifs_query_dir_next,
1212         .close_dir = cifs_close_dir,
1213         .calc_smb_size = smbCalcSize,
1214         .oplock_response = cifs_oplock_response,
1215         .queryfs = cifs_queryfs,
1216         .mand_lock = cifs_mand_lock,
1217         .mand_unlock_range = cifs_unlock_range,
1218         .push_mand_locks = cifs_push_mandatory_locks,
1219         .query_mf_symlink = cifs_query_mf_symlink,
1220         .create_mf_symlink = cifs_create_mf_symlink,
1221         .is_read_op = cifs_is_read_op,
1222         .wp_retry_size = cifs_wp_retry_size,
1223         .dir_needs_close = cifs_dir_needs_close,
1224         .select_sectype = cifs_select_sectype,
1225 #ifdef CONFIG_CIFS_XATTR
1226         .query_all_EAs = CIFSSMBQAllEAs,
1227         .set_EA = CIFSSMBSetEA,
1228 #endif /* CIFS_XATTR */
1229         .get_acl = get_cifs_acl,
1230         .get_acl_by_fid = get_cifs_acl_by_fid,
1231         .set_acl = set_cifs_acl,
1232         .make_node = cifs_make_node,
1233 };
1234 
1235 struct smb_version_values smb1_values = {
1236         .version_string = SMB1_VERSION_STRING,
1237         .protocol_id = SMB10_PROT_ID,
1238         .large_lock_type = LOCKING_ANDX_LARGE_FILES,
1239         .exclusive_lock_type = 0,
1240         .shared_lock_type = LOCKING_ANDX_SHARED_LOCK,
1241         .unlock_lock_type = 0,
1242         .header_preamble_size = 4,
1243         .header_size = sizeof(struct smb_hdr),
1244         .max_header_size = MAX_CIFS_HDR_SIZE,
1245         .read_rsp_size = sizeof(READ_RSP),
1246         .lock_cmd = cpu_to_le16(SMB_COM_LOCKING_ANDX),
1247         .cap_unix = CAP_UNIX,
1248         .cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
1249         .cap_large_files = CAP_LARGE_FILES,
1250         .signing_enabled = SECMODE_SIGN_ENABLED,
1251         .signing_required = SECMODE_SIGN_REQUIRED,
1252 };
/* [<][>][^][v][top][bottom][index][help] */
root/fs/cifs/smb1ops.c

DEFINITIONS
