fs/cifs/smb2ops.c

   1 /*
   2  *  SMB2 version specific operations
   3  *
   4  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   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                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  42                 break;
  43         case 2:
  44                 server->echoes = true;
  45                 server->oplocks = false;
  46                 server->echo_credits = 1;
  47                 cifs_dbg(FYI, "disabling oplocks\n");
  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         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 151                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 152                  smb->ProcessId);
 153         cifs_dbg(VFS, "smb buf %p len %u\n", 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         return wsize;
 191 }
 192
 193 static unsigned int
 194 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 195 {
 196         struct TCP_Server_Info *server = tcon->ses->server;
 197         unsigned int rsize;
 198
 199         /* start with specified rsize, or default */
 200         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 201         rsize = min_t(unsigned int, rsize, server->max_read);
 202         /*
 203          * limit write size to 2 ** 16, because we don't support multicredit
 204          * requests now.
 205          */
 206         rsize = min_t(unsigned int, rsize, 2 << 15);
 207
 208         return rsize;
 209 }
 210
 211 static int
 212 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 213                         struct cifs_sb_info *cifs_sb, const char *full_path)
 214 {
 215         int rc;
 216         __u64 persistent_fid, volatile_fid;
 217         __le16 *utf16_path;
 218         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 219
 220         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 221         if (!utf16_path)
 222                 return -ENOMEM;
 223
 224         rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
 225                        FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, &oplock, NULL);
 226         if (rc) {
 227                 kfree(utf16_path);
 228                 return rc;
 229         }
 230
 231         rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
 232         kfree(utf16_path);
 233         return rc;
 234 }
 235
 236 static int
 237 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 238                   struct cifs_sb_info *cifs_sb, const char *full_path,
 239                   u64 *uniqueid, FILE_ALL_INFO *data)
 240 {
 241         *uniqueid = le64_to_cpu(data->IndexNumber);
 242         return 0;
 243 }
 244
 245 static int
 246 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 247                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 248 {
 249         int rc;
 250         struct smb2_file_all_info *smb2_data;
 251
 252         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 253                             GFP_KERNEL);
 254         if (smb2_data == NULL)
 255                 return -ENOMEM;
 256
 257         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 258                              smb2_data);
 259         if (!rc)
 260                 move_smb2_info_to_cifs(data, smb2_data);
 261         kfree(smb2_data);
 262         return rc;
 263 }
 264
 265 static bool
 266 smb2_can_echo(struct TCP_Server_Info *server)
 267 {
 268         return server->echoes;
 269 }
 270
 271 static void
 272 smb2_clear_stats(struct cifs_tcon *tcon)
 273 {
 274 #ifdef CONFIG_CIFS_STATS
 275         int i;
 276         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 277                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 278                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 279         }
 280 #endif
 281 }
 282
 283 static void
 284 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 285 {
 286         seq_puts(m, "\n\tShare Capabilities:");
 287         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 288                 seq_puts(m, " DFS,");
 289         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 290                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 291         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 292                 seq_puts(m, " SCALEOUT,");
 293         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 294                 seq_puts(m, " CLUSTER,");
 295         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 296                 seq_puts(m, " ASYMMETRIC,");
 297         if (tcon->capabilities == 0)
 298                 seq_puts(m, " None");
 299         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 300 }
 301
 302 static void
 303 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 304 {
 305 #ifdef CONFIG_CIFS_STATS
 306         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 307         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 308         seq_printf(m, "\nNegotiates: %d sent %d failed",
 309                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 310                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 311         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 312                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 313                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 314 #define SMB2LOGOFF              0x0002 /* trivial request/resp */
 315         seq_printf(m, "\nLogoffs: %d sent %d failed",
 316                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 317                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 318         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 319                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 320                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 321         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 322                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 323                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 324         seq_printf(m, "\nCreates: %d sent %d failed",
 325                    atomic_read(&sent[SMB2_CREATE_HE]),
 326                    atomic_read(&failed[SMB2_CREATE_HE]));
 327         seq_printf(m, "\nCloses: %d sent %d failed",
 328                    atomic_read(&sent[SMB2_CLOSE_HE]),
 329                    atomic_read(&failed[SMB2_CLOSE_HE]));
 330         seq_printf(m, "\nFlushes: %d sent %d failed",
 331                    atomic_read(&sent[SMB2_FLUSH_HE]),
 332                    atomic_read(&failed[SMB2_FLUSH_HE]));
 333         seq_printf(m, "\nReads: %d sent %d failed",
 334                    atomic_read(&sent[SMB2_READ_HE]),
 335                    atomic_read(&failed[SMB2_READ_HE]));
 336         seq_printf(m, "\nWrites: %d sent %d failed",
 337                    atomic_read(&sent[SMB2_WRITE_HE]),
 338                    atomic_read(&failed[SMB2_WRITE_HE]));
 339         seq_printf(m, "\nLocks: %d sent %d failed",
 340                    atomic_read(&sent[SMB2_LOCK_HE]),
 341                    atomic_read(&failed[SMB2_LOCK_HE]));
 342         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 343                    atomic_read(&sent[SMB2_IOCTL_HE]),
 344                    atomic_read(&failed[SMB2_IOCTL_HE]));
 345         seq_printf(m, "\nCancels: %d sent %d failed",
 346                    atomic_read(&sent[SMB2_CANCEL_HE]),
 347                    atomic_read(&failed[SMB2_CANCEL_HE]));
 348         seq_printf(m, "\nEchos: %d sent %d failed",
 349                    atomic_read(&sent[SMB2_ECHO_HE]),
 350                    atomic_read(&failed[SMB2_ECHO_HE]));
 351         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 352                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 353                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 354         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 355                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 356                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 357         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 358                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 359                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 360         seq_printf(m, "\nSetInfos: %d sent %d failed",
 361                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 362                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 363         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 364                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 365                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 366 #endif
 367 }
 368
 369 static void
 370 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 371 {
 372         struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
 373         cfile->fid.persistent_fid = fid->persistent_fid;
 374         cfile->fid.volatile_fid = fid->volatile_fid;
 375         smb2_set_oplock_level(cinode, oplock);
 376         cinode->can_cache_brlcks = cinode->clientCanCacheAll;
 377 }
 378
 379 static void
 380 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 381                 struct cifs_fid *fid)
 382 {
 383         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 384 }
 385
 386 static int
 387 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 388                 struct cifs_fid *fid)
 389 {
 390         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 391 }
 392
 393 static unsigned int
 394 smb2_read_data_offset(char *buf)
 395 {
 396         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 397         return rsp->DataOffset;
 398 }
 399
 400 static unsigned int
 401 smb2_read_data_length(char *buf)
 402 {
 403         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 404         return le32_to_cpu(rsp->DataLength);
 405 }
 406
 407
 408 static int
 409 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
 410                struct cifs_io_parms *parms, unsigned int *bytes_read,
 411                char **buf, int *buf_type)
 412 {
 413         parms->persistent_fid = cfile->fid.persistent_fid;
 414         parms->volatile_fid = cfile->fid.volatile_fid;
 415         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 416 }
 417
 418 static int
 419 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
 420                 struct cifs_io_parms *parms, unsigned int *written,
 421                 struct kvec *iov, unsigned long nr_segs)
 422 {
 423
 424         parms->persistent_fid = cfile->fid.persistent_fid;
 425         parms->volatile_fid = cfile->fid.volatile_fid;
 426         return SMB2_write(xid, parms, written, iov, nr_segs);
 427 }
 428
 429 static int
 430 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 431                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 432 {
 433         __le64 eof = cpu_to_le64(size);
 434         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 435                             cfile->fid.volatile_fid, cfile->pid, &eof);
 436 }
 437
 438 static int
 439 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 440                      const char *path, struct cifs_sb_info *cifs_sb,
 441                      struct cifs_fid *fid, __u16 search_flags,
 442                      struct cifs_search_info *srch_inf)
 443 {
 444         __le16 *utf16_path;
 445         int rc;
 446         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 447         __u64 persistent_fid, volatile_fid;
 448
 449         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 450         if (!utf16_path)
 451                 return -ENOMEM;
 452
 453         rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
 454                        FILE_READ_ATTRIBUTES | FILE_READ_DATA, FILE_OPEN, 0, 0,
 455                        &oplock, NULL);
 456         kfree(utf16_path);
 457         if (rc) {
 458                 cifs_dbg(VFS, "open dir failed\n");
 459                 return rc;
 460         }
 461
 462         srch_inf->entries_in_buffer = 0;
 463         srch_inf->index_of_last_entry = 0;
 464         fid->persistent_fid = persistent_fid;
 465         fid->volatile_fid = volatile_fid;
 466
 467         rc = SMB2_query_directory(xid, tcon, persistent_fid, volatile_fid, 0,
 468                                   srch_inf);
 469         if (rc) {
 470                 cifs_dbg(VFS, "query directory failed\n");
 471                 SMB2_close(xid, tcon, persistent_fid, volatile_fid);
 472         }
 473         return rc;
 474 }
 475
 476 static int
 477 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 478                     struct cifs_fid *fid, __u16 search_flags,
 479                     struct cifs_search_info *srch_inf)
 480 {
 481         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 482                                     fid->volatile_fid, 0, srch_inf);
 483 }
 484
 485 static int
 486 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 487                struct cifs_fid *fid)
 488 {
 489         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 490 }
 491
 492 /*
 493 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 494 * the number of credits and return true. Otherwise - return false.
 495 */
 496 static bool
 497 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 498 {
 499         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 500
 501         if (hdr->Status != STATUS_PENDING)
 502                 return false;
 503
 504         if (!length) {
 505                 spin_lock(&server->req_lock);
 506                 server->credits += le16_to_cpu(hdr->CreditRequest);
 507                 spin_unlock(&server->req_lock);
 508                 wake_up(&server->request_q);
 509         }
 510
 511         return true;
 512 }
 513
 514 static int
 515 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 516                      struct cifsInodeInfo *cinode)
 517 {
 518         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 519                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 520                                         smb2_get_lease_state(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 static bool
 547 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
 548 {
 549         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
 550                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
 551 }
 552
 553 static int
 554 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 555                __u64 length, __u32 type, int lock, int unlock, bool wait)
 556 {
 557         if (unlock && !lock)
 558                 type = SMB2_LOCKFLAG_UNLOCK;
 559         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
 560                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
 561                          current->tgid, length, offset, type, wait);
 562 }
 563
 564 static void
 565 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
 566 {
 567         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
 568 }
 569
 570 static void
 571 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
 572 {
 573         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
 574 }
 575
 576 static void
 577 smb2_new_lease_key(struct cifs_fid *fid)
 578 {
 579         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
 580 }
 581
 582 struct smb_version_operations smb21_operations = {
 583         .compare_fids = smb2_compare_fids,
 584         .setup_request = smb2_setup_request,
 585         .setup_async_request = smb2_setup_async_request,
 586         .check_receive = smb2_check_receive,
 587         .add_credits = smb2_add_credits,
 588         .set_credits = smb2_set_credits,
 589         .get_credits_field = smb2_get_credits_field,
 590         .get_credits = smb2_get_credits,
 591         .get_next_mid = smb2_get_next_mid,
 592         .read_data_offset = smb2_read_data_offset,
 593         .read_data_length = smb2_read_data_length,
 594         .map_error = map_smb2_to_linux_error,
 595         .find_mid = smb2_find_mid,
 596         .check_message = smb2_check_message,
 597         .dump_detail = smb2_dump_detail,
 598         .clear_stats = smb2_clear_stats,
 599         .print_stats = smb2_print_stats,
 600         .is_oplock_break = smb2_is_valid_oplock_break,
 601         .need_neg = smb2_need_neg,
 602         .negotiate = smb2_negotiate,
 603         .negotiate_wsize = smb2_negotiate_wsize,
 604         .negotiate_rsize = smb2_negotiate_rsize,
 605         .sess_setup = SMB2_sess_setup,
 606         .logoff = SMB2_logoff,
 607         .tree_connect = SMB2_tcon,
 608         .tree_disconnect = SMB2_tdis,
 609         .is_path_accessible = smb2_is_path_accessible,
 610         .can_echo = smb2_can_echo,
 611         .echo = SMB2_echo,
 612         .query_path_info = smb2_query_path_info,
 613         .get_srv_inum = smb2_get_srv_inum,
 614         .query_file_info = smb2_query_file_info,
 615         .set_path_size = smb2_set_path_size,
 616         .set_file_size = smb2_set_file_size,
 617         .set_file_info = smb2_set_file_info,
 618         .mkdir = smb2_mkdir,
 619         .mkdir_setinfo = smb2_mkdir_setinfo,
 620         .rmdir = smb2_rmdir,
 621         .unlink = smb2_unlink,
 622         .rename = smb2_rename_path,
 623         .create_hardlink = smb2_create_hardlink,
 624         .open = smb2_open_file,
 625         .set_fid = smb2_set_fid,
 626         .close = smb2_close_file,
 627         .flush = smb2_flush_file,
 628         .async_readv = smb2_async_readv,
 629         .async_writev = smb2_async_writev,
 630         .sync_read = smb2_sync_read,
 631         .sync_write = smb2_sync_write,
 632         .query_dir_first = smb2_query_dir_first,
 633         .query_dir_next = smb2_query_dir_next,
 634         .close_dir = smb2_close_dir,
 635         .calc_smb_size = smb2_calc_size,
 636         .is_status_pending = smb2_is_status_pending,
 637         .oplock_response = smb2_oplock_response,
 638         .queryfs = smb2_queryfs,
 639         .mand_lock = smb2_mand_lock,
 640         .mand_unlock_range = smb2_unlock_range,
 641         .push_mand_locks = smb2_push_mandatory_locks,
 642         .get_lease_key = smb2_get_lease_key,
 643         .set_lease_key = smb2_set_lease_key,
 644         .new_lease_key = smb2_new_lease_key,
 645         .calc_signature = smb2_calc_signature,
 646 };
 647
 648
 649 struct smb_version_operations smb30_operations = {
 650         .compare_fids = smb2_compare_fids,
 651         .setup_request = smb2_setup_request,
 652         .setup_async_request = smb2_setup_async_request,
 653         .check_receive = smb2_check_receive,
 654         .add_credits = smb2_add_credits,
 655         .set_credits = smb2_set_credits,
 656         .get_credits_field = smb2_get_credits_field,
 657         .get_credits = smb2_get_credits,
 658         .get_next_mid = smb2_get_next_mid,
 659         .read_data_offset = smb2_read_data_offset,
 660         .read_data_length = smb2_read_data_length,
 661         .map_error = map_smb2_to_linux_error,
 662         .find_mid = smb2_find_mid,
 663         .check_message = smb2_check_message,
 664         .dump_detail = smb2_dump_detail,
 665         .clear_stats = smb2_clear_stats,
 666         .print_stats = smb2_print_stats,
 667         .dump_share_caps = smb2_dump_share_caps,
 668         .is_oplock_break = smb2_is_valid_oplock_break,
 669         .need_neg = smb2_need_neg,
 670         .negotiate = smb2_negotiate,
 671         .negotiate_wsize = smb2_negotiate_wsize,
 672         .negotiate_rsize = smb2_negotiate_rsize,
 673         .sess_setup = SMB2_sess_setup,
 674         .logoff = SMB2_logoff,
 675         .tree_connect = SMB2_tcon,
 676         .tree_disconnect = SMB2_tdis,
 677         .is_path_accessible = smb2_is_path_accessible,
 678         .can_echo = smb2_can_echo,
 679         .echo = SMB2_echo,
 680         .query_path_info = smb2_query_path_info,
 681         .get_srv_inum = smb2_get_srv_inum,
 682         .query_file_info = smb2_query_file_info,
 683         .set_path_size = smb2_set_path_size,
 684         .set_file_size = smb2_set_file_size,
 685         .set_file_info = smb2_set_file_info,
 686         .mkdir = smb2_mkdir,
 687         .mkdir_setinfo = smb2_mkdir_setinfo,
 688         .rmdir = smb2_rmdir,
 689         .unlink = smb2_unlink,
 690         .rename = smb2_rename_path,
 691         .create_hardlink = smb2_create_hardlink,
 692         .open = smb2_open_file,
 693         .set_fid = smb2_set_fid,
 694         .close = smb2_close_file,
 695         .flush = smb2_flush_file,
 696         .async_readv = smb2_async_readv,
 697         .async_writev = smb2_async_writev,
 698         .sync_read = smb2_sync_read,
 699         .sync_write = smb2_sync_write,
 700         .query_dir_first = smb2_query_dir_first,
 701         .query_dir_next = smb2_query_dir_next,
 702         .close_dir = smb2_close_dir,
 703         .calc_smb_size = smb2_calc_size,
 704         .is_status_pending = smb2_is_status_pending,
 705         .oplock_response = smb2_oplock_response,
 706         .queryfs = smb2_queryfs,
 707         .mand_lock = smb2_mand_lock,
 708         .mand_unlock_range = smb2_unlock_range,
 709         .push_mand_locks = smb2_push_mandatory_locks,
 710         .get_lease_key = smb2_get_lease_key,
 711         .set_lease_key = smb2_set_lease_key,
 712         .new_lease_key = smb2_new_lease_key,
 713         .calc_signature = smb3_calc_signature,
 714 };
 715
 716 struct smb_version_values smb20_values = {
 717         .version_string = SMB20_VERSION_STRING,
 718         .protocol_id = SMB20_PROT_ID,
 719         .req_capabilities = 0, /* MBZ */
 720         .large_lock_type = 0,
 721         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 722         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 723         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 724         .header_size = sizeof(struct smb2_hdr),
 725         .max_header_size = MAX_SMB2_HDR_SIZE,
 726         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 727         .lock_cmd = SMB2_LOCK,
 728         .cap_unix = 0,
 729         .cap_nt_find = SMB2_NT_FIND,
 730         .cap_large_files = SMB2_LARGE_FILES,
 731         .oplock_read = SMB2_OPLOCK_LEVEL_II,
 732 };
 733
 734 struct smb_version_values smb21_values = {
 735         .version_string = SMB21_VERSION_STRING,
 736         .protocol_id = SMB21_PROT_ID,
 737         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
 738         .large_lock_type = 0,
 739         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 740         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 741         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 742         .header_size = sizeof(struct smb2_hdr),
 743         .max_header_size = MAX_SMB2_HDR_SIZE,
 744         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 745         .lock_cmd = SMB2_LOCK,
 746         .cap_unix = 0,
 747         .cap_nt_find = SMB2_NT_FIND,
 748         .cap_large_files = SMB2_LARGE_FILES,
 749         .oplock_read = SMB2_OPLOCK_LEVEL_II,
 750 };
 751
 752 struct smb_version_values smb30_values = {
 753         .version_string = SMB30_VERSION_STRING,
 754         .protocol_id = SMB30_PROT_ID,
 755         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
 756         .large_lock_type = 0,
 757         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 758         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 759         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 760         .header_size = sizeof(struct smb2_hdr),
 761         .max_header_size = MAX_SMB2_HDR_SIZE,
 762         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 763         .lock_cmd = SMB2_LOCK,
 764         .cap_unix = 0,
 765         .cap_nt_find = SMB2_NT_FIND,
 766         .cap_large_files = SMB2_LARGE_FILES,
 767         .oplock_read = SMB2_OPLOCK_LEVEL_II,
 768 };
 769
 770 struct smb_version_values smb302_values = {
 771         .version_string = SMB302_VERSION_STRING,
 772         .protocol_id = SMB302_PROT_ID,
 773         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
 774         .large_lock_type = 0,
 775         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 776         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 777         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 778         .header_size = sizeof(struct smb2_hdr),
 779         .max_header_size = MAX_SMB2_HDR_SIZE,
 780         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 781         .lock_cmd = SMB2_LOCK,
 782         .cap_unix = 0,
 783         .cap_nt_find = SMB2_NT_FIND,
 784         .cap_large_files = SMB2_LARGE_FILES,
 785         .oplock_read = SMB2_OPLOCK_LEVEL_II,
 786 };