fs/cifs/smb2ops.c

   1 /*
   2  *  SMB2 version specific operations
   3  *
   4  *  Copyright (c) 2012, Jeff Layton <[email protected]>
   5  *
   6  *  This library is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License v2 as published
   8  *  by the Free Software Foundation.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13  *  the GNU Lesser General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Lesser General Public License
  16  *  along with this library; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 #include <linux/pagemap.h>
  21 #include <linux/vfs.h>
  22 #include "cifsglob.h"
  23 #include "smb2pdu.h"
  24 #include "smb2proto.h"
  25 #include "cifsproto.h"
  26 #include "cifs_debug.h"
  27 #include "smb2status.h"
  28 #include "smb2glob.h"
  29
  30 static int
  31 change_conf(struct TCP_Server_Info *server)
  32 {
  33         server->credits += server->echo_credits + server->oplock_credits;
  34         server->oplock_credits = server->echo_credits = 0;
  35         switch (server->credits) {
  36         case 0:
  37                 return -1;
  38         case 1:
  39                 server->echoes = false;
  40                 server->oplocks = false;
  41                 cERROR(1, "disabling echoes and oplocks");
  42                 break;
  43         case 2:
  44                 server->echoes = true;
  45                 server->oplocks = false;
  46                 server->echo_credits = 1;
  47                 cFYI(1, "disabling oplocks");
  48                 break;
  49         default:
  50                 server->echoes = true;
  51                 server->oplocks = true;
  52                 server->echo_credits = 1;
  53                 server->oplock_credits = 1;
  54         }
  55         server->credits -= server->echo_credits + server->oplock_credits;
  56         return 0;
  57 }
  58
  59 static void
  60 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  61                  const int optype)
  62 {
  63         int *val, rc = 0;
  64         spin_lock(&server->req_lock);
  65         val = server->ops->get_credits_field(server, optype);
  66         *val += add;
  67         server->in_flight--;
  68         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  69                 rc = change_conf(server);
  70         /*
  71          * Sometimes server returns 0 credits on oplock break ack - we need to
  72          * rebalance credits in this case.
  73          */
  74         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  75                  server->oplocks) {
  76                 if (server->credits > 1) {
  77                         server->credits--;
  78                         server->oplock_credits++;
  79                 }
  80         }
  81         spin_unlock(&server->req_lock);
  82         wake_up(&server->request_q);
  83         if (rc)
  84                 cifs_reconnect(server);
  85 }
  86
  87 static void
  88 smb2_set_credits(struct TCP_Server_Info *server, const int val)
  89 {
  90         spin_lock(&server->req_lock);
  91         server->credits = val;
  92         spin_unlock(&server->req_lock);
  93 }
  94
  95 static int *
  96 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
  97 {
  98         switch (optype) {
  99         case CIFS_ECHO_OP:
 100                 return &server->echo_credits;
 101         case CIFS_OBREAK_OP:
 102                 return &server->oplock_credits;
 103         default:
 104                 return &server->credits;
 105         }
 106 }
 107
 108 static unsigned int
 109 smb2_get_credits(struct mid_q_entry *mid)
 110 {
 111         return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
 112 }
 113
 114 static __u64
 115 smb2_get_next_mid(struct TCP_Server_Info *server)
 116 {
 117         __u64 mid;
 118         /* for SMB2 we need the current value */
 119         spin_lock(&GlobalMid_Lock);
 120         mid = server->CurrentMid++;
 121         spin_unlock(&GlobalMid_Lock);
 122         return mid;
 123 }
 124
 125 static struct mid_q_entry *
 126 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 127 {
 128         struct mid_q_entry *mid;
 129         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 130
 131         spin_lock(&GlobalMid_Lock);
 132         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 133                 if ((mid->mid == hdr->MessageId) &&
 134                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 135                     (mid->command == hdr->Command)) {
 136                         spin_unlock(&GlobalMid_Lock);
 137                         return mid;
 138                 }
 139         }
 140         spin_unlock(&GlobalMid_Lock);
 141         return NULL;
 142 }
 143
 144 static void
 145 smb2_dump_detail(void *buf)
 146 {
 147 #ifdef CONFIG_CIFS_DEBUG2
 148         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 149
 150         cERROR(1, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d",
 151                   smb->Command, smb->Status, smb->Flags, smb->MessageId,
 152                   smb->ProcessId);
 153         cERROR(1, "smb buf %p len %u", smb, smb2_calc_size(smb));
 154 #endif
 155 }
 156
 157 static bool
 158 smb2_need_neg(struct TCP_Server_Info *server)
 159 {
 160         return server->max_read == 0;
 161 }
 162
 163 static int
 164 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 165 {
 166         int rc;
 167         ses->server->CurrentMid = 0;
 168         rc = SMB2_negotiate(xid, ses);
 169         /* BB we probably don't need to retry with modern servers */
 170         if (rc == -EAGAIN)
 171                 rc = -EHOSTDOWN;
 172         return rc;
 173 }
 174
 175 static unsigned int
 176 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 177 {
 178         struct TCP_Server_Info *server = tcon->ses->server;
 179         unsigned int wsize;
 180
 181         /* start with specified wsize, or default */
 182         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 183         wsize = min_t(unsigned int, wsize, server->max_write);
 184         /*
 185          * limit write size to 2 ** 16, because we don't support multicredit
 186          * requests now.
 187          */
 188         wsize = min_t(unsigned int, wsize, 2 << 15);
 189
 190         /* limit to the amount that we can kmap at once */
 191         wsize = min_t(unsigned int, wsize, CIFS_KMAP_SIZE_LIMIT);
 192
 193         return wsize;
 194 }
 195
 196 static unsigned int
 197 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 198 {
 199         struct TCP_Server_Info *server = tcon->ses->server;
 200         unsigned int rsize;
 201
 202         /* start with specified rsize, or default */
 203         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 204         rsize = min_t(unsigned int, rsize, server->max_read);
 205         /*
 206          * limit write size to 2 ** 16, because we don't support multicredit
 207          * requests now.
 208          */
 209         rsize = min_t(unsigned int, rsize, 2 << 15);
 210
 211         /* limit to the amount that we can kmap at once */
 212         rsize = min_t(unsigned int, rsize, CIFS_KMAP_SIZE_LIMIT);
 213
 214         return rsize;
 215 }
 216
 217 static int
 218 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 219                         struct cifs_sb_info *cifs_sb, const char *full_path)
 220 {
 221         int rc;
 222         __u64 persistent_fid, volatile_fid;
 223         __le16 *utf16_path;
 224         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 225
 226         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 227         if (!utf16_path)
 228                 return -ENOMEM;
 229
 230         rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
 231                        FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, &oplock, NULL);
 232         if (rc) {
 233                 kfree(utf16_path);
 234                 return rc;
 235         }
 236
 237         rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
 238         kfree(utf16_path);
 239         return rc;
 240 }
 241
 242 static int
 243 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 244                   struct cifs_sb_info *cifs_sb, const char *full_path,
 245                   u64 *uniqueid, FILE_ALL_INFO *data)
 246 {
 247         *uniqueid = le64_to_cpu(data->IndexNumber);
 248         return 0;
 249 }
 250
 251 static int
 252 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 253                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 254 {
 255         int rc;
 256         struct smb2_file_all_info *smb2_data;
 257
 258         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 259                             GFP_KERNEL);
 260         if (smb2_data == NULL)
 261                 return -ENOMEM;
 262
 263         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 264                              smb2_data);
 265         if (!rc)
 266                 move_smb2_info_to_cifs(data, smb2_data);
 267         kfree(smb2_data);
 268         return rc;
 269 }
 270
 271 static char *
 272 smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
 273                         struct cifs_tcon *tcon)
 274 {
 275         int pplen = vol->prepath ? strlen(vol->prepath) : 0;
 276         char *full_path = NULL;
 277
 278         /* if no prefix path, simply set path to the root of share to "" */
 279         if (pplen == 0) {
 280                 full_path = kzalloc(2, GFP_KERNEL);
 281                 return full_path;
 282         }
 283
 284         cERROR(1, "prefixpath is not supported for SMB2 now");
 285         return NULL;
 286 }
 287
 288 static bool
 289 smb2_can_echo(struct TCP_Server_Info *server)
 290 {
 291         return server->echoes;
 292 }
 293
 294 static void
 295 smb2_clear_stats(struct cifs_tcon *tcon)
 296 {
 297 #ifdef CONFIG_CIFS_STATS
 298         int i;
 299         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 300                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 301                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 302         }
 303 #endif
 304 }
 305
 306 static void
 307 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 308 {
 309 #ifdef CONFIG_CIFS_STATS
 310         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 311         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 312         seq_printf(m, "\nNegotiates: %d sent %d failed",
 313                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 314                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 315         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 316                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 317                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 318 #define SMB2LOGOFF              0x0002 /* trivial request/resp */
 319         seq_printf(m, "\nLogoffs: %d sent %d failed",
 320                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 321                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 322         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 323                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 324                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 325         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 326                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 327                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 328         seq_printf(m, "\nCreates: %d sent %d failed",
 329                    atomic_read(&sent[SMB2_CREATE_HE]),
 330                    atomic_read(&failed[SMB2_CREATE_HE]));
 331         seq_printf(m, "\nCloses: %d sent %d failed",
 332                    atomic_read(&sent[SMB2_CLOSE_HE]),
 333                    atomic_read(&failed[SMB2_CLOSE_HE]));
 334         seq_printf(m, "\nFlushes: %d sent %d failed",
 335                    atomic_read(&sent[SMB2_FLUSH_HE]),
 336                    atomic_read(&failed[SMB2_FLUSH_HE]));
 337         seq_printf(m, "\nReads: %d sent %d failed",
 338                    atomic_read(&sent[SMB2_READ_HE]),
 339                    atomic_read(&failed[SMB2_READ_HE]));
 340         seq_printf(m, "\nWrites: %d sent %d failed",
 341                    atomic_read(&sent[SMB2_WRITE_HE]),
 342                    atomic_read(&failed[SMB2_WRITE_HE]));
 343         seq_printf(m, "\nLocks: %d sent %d failed",
 344                    atomic_read(&sent[SMB2_LOCK_HE]),
 345                    atomic_read(&failed[SMB2_LOCK_HE]));
 346         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 347                    atomic_read(&sent[SMB2_IOCTL_HE]),
 348                    atomic_read(&failed[SMB2_IOCTL_HE]));
 349         seq_printf(m, "\nCancels: %d sent %d failed",
 350                    atomic_read(&sent[SMB2_CANCEL_HE]),
 351                    atomic_read(&failed[SMB2_CANCEL_HE]));
 352         seq_printf(m, "\nEchos: %d sent %d failed",
 353                    atomic_read(&sent[SMB2_ECHO_HE]),
 354                    atomic_read(&failed[SMB2_ECHO_HE]));
 355         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 356                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 357                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 358         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 359                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 360                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 361         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 362                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 363                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 364         seq_printf(m, "\nSetInfos: %d sent %d failed",
 365                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 366                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 367         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 368                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 369                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 370 #endif
 371 }
 372
 373 static void
 374 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 375 {
 376         struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
 377         cfile->fid.persistent_fid = fid->persistent_fid;
 378         cfile->fid.volatile_fid = fid->volatile_fid;
 379         smb2_set_oplock_level(cinode, oplock);
 380         /* cinode->can_cache_brlcks = cinode->clientCanCacheAll; */
 381 }
 382
 383 static int
 384 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 385                 struct cifs_fid *fid)
 386 {
 387         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 388 }
 389
 390 static int
 391 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 392                 struct cifs_fid *fid)
 393 {
 394         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 395 }
 396
 397 static unsigned int
 398 smb2_read_data_offset(char *buf)
 399 {
 400         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 401         return rsp->DataOffset;
 402 }
 403
 404 static unsigned int
 405 smb2_read_data_length(char *buf)
 406 {
 407         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 408         return le32_to_cpu(rsp->DataLength);
 409 }
 410
 411
 412 static int
 413 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
 414                struct cifs_io_parms *parms, unsigned int *bytes_read,
 415                char **buf, int *buf_type)
 416 {
 417         parms->persistent_fid = cfile->fid.persistent_fid;
 418         parms->volatile_fid = cfile->fid.volatile_fid;
 419         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 420 }
 421
 422 static int
 423 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
 424                 struct cifs_io_parms *parms, unsigned int *written,
 425                 struct kvec *iov, unsigned long nr_segs)
 426 {
 427
 428         parms->persistent_fid = cfile->fid.persistent_fid;
 429         parms->volatile_fid = cfile->fid.volatile_fid;
 430         return SMB2_write(xid, parms, written, iov, nr_segs);
 431 }
 432
 433 static int
 434 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 435                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 436 {
 437         __le64 eof = cpu_to_le64(size);
 438         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 439                             cfile->fid.volatile_fid, cfile->pid, &eof);
 440 }
 441
 442 static int
 443 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 444                      const char *path, struct cifs_sb_info *cifs_sb,
 445                      struct cifs_fid *fid, __u16 search_flags,
 446                      struct cifs_search_info *srch_inf)
 447 {
 448         __le16 *utf16_path;
 449         int rc;
 450         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 451         __u64 persistent_fid, volatile_fid;
 452
 453         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 454         if (!utf16_path)
 455                 return -ENOMEM;
 456
 457         rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
 458                        FILE_READ_ATTRIBUTES | FILE_READ_DATA, FILE_OPEN, 0, 0,
 459                        &oplock, NULL);
 460         kfree(utf16_path);
 461         if (rc) {
 462                 cERROR(1, "open dir failed");
 463                 return rc;
 464         }
 465
 466         srch_inf->entries_in_buffer = 0;
 467         srch_inf->index_of_last_entry = 0;
 468         fid->persistent_fid = persistent_fid;
 469         fid->volatile_fid = volatile_fid;
 470
 471         rc = SMB2_query_directory(xid, tcon, persistent_fid, volatile_fid, 0,
 472                                   srch_inf);
 473         if (rc) {
 474                 cERROR(1, "query directory failed");
 475                 SMB2_close(xid, tcon, persistent_fid, volatile_fid);
 476         }
 477         return rc;
 478 }
 479
 480 static int
 481 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 482                     struct cifs_fid *fid, __u16 search_flags,
 483                     struct cifs_search_info *srch_inf)
 484 {
 485         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 486                                     fid->volatile_fid, 0, srch_inf);
 487 }
 488
 489 static int
 490 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 491                struct cifs_fid *fid)
 492 {
 493         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 494 }
 495
 496 /*
 497 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 498 * the number of credits and return true. Otherwise - return false.
 499 */
 500 static bool
 501 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 502 {
 503         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 504
 505         if (le32_to_cpu(hdr->Status) != STATUS_PENDING)
 506                 return false;
 507
 508         if (!length) {
 509                 spin_lock(&server->req_lock);
 510                 server->credits += le16_to_cpu(hdr->CreditRequest);
 511                 spin_unlock(&server->req_lock);
 512                 wake_up(&server->request_q);
 513         }
 514
 515         return true;
 516 }
 517
 518 static int
 519 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 520                      struct cifsInodeInfo *cinode)
 521 {
 522         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 523                                  fid->volatile_fid,
 524                                  cinode->clientCanCacheRead ? 1 : 0);
 525 }
 526
 527 static int
 528 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 529              struct kstatfs *buf)
 530 {
 531         int rc;
 532         u64 persistent_fid, volatile_fid;
 533         __le16 srch_path = 0; /* Null - open root of share */
 534         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 535
 536         rc = SMB2_open(xid, tcon, &srch_path, &persistent_fid, &volatile_fid,
 537                        FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, &oplock, NULL);
 538         if (rc)
 539                 return rc;
 540         buf->f_type = SMB2_MAGIC_NUMBER;
 541         rc = SMB2_QFS_info(xid, tcon, persistent_fid, volatile_fid, buf);
 542         SMB2_close(xid, tcon, persistent_fid, volatile_fid);
 543         return rc;
 544 }
 545
 546 struct smb_version_operations smb21_operations = {
 547         .setup_request = smb2_setup_request,
 548         .setup_async_request = smb2_setup_async_request,
 549         .check_receive = smb2_check_receive,
 550         .add_credits = smb2_add_credits,
 551         .set_credits = smb2_set_credits,
 552         .get_credits_field = smb2_get_credits_field,
 553         .get_credits = smb2_get_credits,
 554         .get_next_mid = smb2_get_next_mid,
 555         .read_data_offset = smb2_read_data_offset,
 556         .read_data_length = smb2_read_data_length,
 557         .map_error = map_smb2_to_linux_error,
 558         .find_mid = smb2_find_mid,
 559         .check_message = smb2_check_message,
 560         .dump_detail = smb2_dump_detail,
 561         .clear_stats = smb2_clear_stats,
 562         .print_stats = smb2_print_stats,
 563         .is_oplock_break = smb2_is_valid_oplock_break,
 564         .need_neg = smb2_need_neg,
 565         .negotiate = smb2_negotiate,
 566         .negotiate_wsize = smb2_negotiate_wsize,
 567         .negotiate_rsize = smb2_negotiate_rsize,
 568         .sess_setup = SMB2_sess_setup,
 569         .logoff = SMB2_logoff,
 570         .tree_connect = SMB2_tcon,
 571         .tree_disconnect = SMB2_tdis,
 572         .is_path_accessible = smb2_is_path_accessible,
 573         .can_echo = smb2_can_echo,
 574         .echo = SMB2_echo,
 575         .query_path_info = smb2_query_path_info,
 576         .get_srv_inum = smb2_get_srv_inum,
 577         .query_file_info = smb2_query_file_info,
 578         .set_path_size = smb2_set_path_size,
 579         .set_file_size = smb2_set_file_size,
 580         .set_file_info = smb2_set_file_info,
 581         .build_path_to_root = smb2_build_path_to_root,
 582         .mkdir = smb2_mkdir,
 583         .mkdir_setinfo = smb2_mkdir_setinfo,
 584         .rmdir = smb2_rmdir,
 585         .unlink = smb2_unlink,
 586         .rename = smb2_rename_path,
 587         .create_hardlink = smb2_create_hardlink,
 588         .open = smb2_open_file,
 589         .set_fid = smb2_set_fid,
 590         .close = smb2_close_file,
 591         .flush = smb2_flush_file,
 592         .async_readv = smb2_async_readv,
 593         .async_writev = smb2_async_writev,
 594         .sync_read = smb2_sync_read,
 595         .sync_write = smb2_sync_write,
 596         .query_dir_first = smb2_query_dir_first,
 597         .query_dir_next = smb2_query_dir_next,
 598         .close_dir = smb2_close_dir,
 599         .calc_smb_size = smb2_calc_size,
 600         .is_status_pending = smb2_is_status_pending,
 601         .oplock_response = smb2_oplock_response,
 602         .queryfs = smb2_queryfs,
 603 };
 604
 605 struct smb_version_values smb21_values = {
 606         .version_string = SMB21_VERSION_STRING,
 607         .header_size = sizeof(struct smb2_hdr),
 608         .max_header_size = MAX_SMB2_HDR_SIZE,
 609         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 610         .lock_cmd = SMB2_LOCK,
 611         .cap_unix = 0,
 612         .cap_nt_find = SMB2_NT_FIND,
 613         .cap_large_files = SMB2_LARGE_FILES,
 614 };