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 <linux/falloc.h>
  23 #include "cifsglob.h"
  24 #include "smb2pdu.h"
  25 #include "smb2proto.h"
  26 #include "cifsproto.h"
  27 #include "cifs_debug.h"
  28 #include "cifs_unicode.h"
  29 #include "smb2status.h"
  30 #include "smb2glob.h"
  31
  32 static int
  33 change_conf(struct TCP_Server_Info *server)
  34 {
  35         server->credits += server->echo_credits + server->oplock_credits;
  36         server->oplock_credits = server->echo_credits = 0;
  37         switch (server->credits) {
  38         case 0:
  39                 return -1;
  40         case 1:
  41                 server->echoes = false;
  42                 server->oplocks = false;
  43                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  44                 break;
  45         case 2:
  46                 server->echoes = true;
  47                 server->oplocks = false;
  48                 server->echo_credits = 1;
  49                 cifs_dbg(FYI, "disabling oplocks\n");
  50                 break;
  51         default:
  52                 server->echoes = true;
  53                 if (enable_oplocks) {
  54                         server->oplocks = true;
  55                         server->oplock_credits = 1;
  56                 } else
  57                         server->oplocks = false;
  58
  59                 server->echo_credits = 1;
  60         }
  61         server->credits -= server->echo_credits + server->oplock_credits;
  62         return 0;
  63 }
  64
  65 static void
  66 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  67                  const int optype)
  68 {
  69         int *val, rc = 0;
  70         spin_lock(&server->req_lock);
  71         val = server->ops->get_credits_field(server, optype);
  72         *val += add;
  73         if (*val > 65000) {
  74                 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
  75                 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
  76         }
  77         server->in_flight--;
  78         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  79                 rc = change_conf(server);
  80         /*
  81          * Sometimes server returns 0 credits on oplock break ack - we need to
  82          * rebalance credits in this case.
  83          */
  84         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  85                  server->oplocks) {
  86                 if (server->credits > 1) {
  87                         server->credits--;
  88                         server->oplock_credits++;
  89                 }
  90         }
  91         spin_unlock(&server->req_lock);
  92         wake_up(&server->request_q);
  93         if (rc)
  94                 cifs_reconnect(server);
  95 }
  96
  97 static void
  98 smb2_set_credits(struct TCP_Server_Info *server, const int val)
  99 {
 100         spin_lock(&server->req_lock);
 101         server->credits = val;
 102         spin_unlock(&server->req_lock);
 103 }
 104
 105 static int *
 106 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 107 {
 108         switch (optype) {
 109         case CIFS_ECHO_OP:
 110                 return &server->echo_credits;
 111         case CIFS_OBREAK_OP:
 112                 return &server->oplock_credits;
 113         default:
 114                 return &server->credits;
 115         }
 116 }
 117
 118 static unsigned int
 119 smb2_get_credits(struct mid_q_entry *mid)
 120 {
 121         return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
 122 }
 123
 124 static int
 125 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 126                       unsigned int *num, unsigned int *credits)
 127 {
 128         int rc = 0;
 129         unsigned int scredits;
 130
 131         spin_lock(&server->req_lock);
 132         while (1) {
 133                 if (server->credits <= 0) {
 134                         spin_unlock(&server->req_lock);
 135                         cifs_num_waiters_inc(server);
 136                         rc = wait_event_killable(server->request_q,
 137                                         has_credits(server, &server->credits));
 138                         cifs_num_waiters_dec(server);
 139                         if (rc)
 140                                 return rc;
 141                         spin_lock(&server->req_lock);
 142                 } else {
 143                         if (server->tcpStatus == CifsExiting) {
 144                                 spin_unlock(&server->req_lock);
 145                                 return -ENOENT;
 146                         }
 147
 148                         scredits = server->credits;
 149                         /* can deadlock with reopen */
 150                         if (scredits == 1) {
 151                                 *num = SMB2_MAX_BUFFER_SIZE;
 152                                 *credits = 0;
 153                                 break;
 154                         }
 155
 156                         /* leave one credit for a possible reopen */
 157                         scredits--;
 158                         *num = min_t(unsigned int, size,
 159                                      scredits * SMB2_MAX_BUFFER_SIZE);
 160
 161                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 162                         server->credits -= *credits;
 163                         server->in_flight++;
 164                         break;
 165                 }
 166         }
 167         spin_unlock(&server->req_lock);
 168         return rc;
 169 }
 170
 171 static __u64
 172 smb2_get_next_mid(struct TCP_Server_Info *server)
 173 {
 174         __u64 mid;
 175         /* for SMB2 we need the current value */
 176         spin_lock(&GlobalMid_Lock);
 177         mid = server->CurrentMid++;
 178         spin_unlock(&GlobalMid_Lock);
 179         return mid;
 180 }
 181
 182 static struct mid_q_entry *
 183 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 184 {
 185         struct mid_q_entry *mid;
 186         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 187         __u64 wire_mid = le64_to_cpu(hdr->MessageId);
 188
 189         if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
 190                 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
 191                 return NULL;
 192         }
 193
 194         spin_lock(&GlobalMid_Lock);
 195         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 196                 if ((mid->mid == wire_mid) &&
 197                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 198                     (mid->command == hdr->Command)) {
 199                         spin_unlock(&GlobalMid_Lock);
 200                         return mid;
 201                 }
 202         }
 203         spin_unlock(&GlobalMid_Lock);
 204         return NULL;
 205 }
 206
 207 static void
 208 smb2_dump_detail(void *buf)
 209 {
 210 #ifdef CONFIG_CIFS_DEBUG2
 211         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 212
 213         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 214                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 215                  smb->ProcessId);
 216         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
 217 #endif
 218 }
 219
 220 static bool
 221 smb2_need_neg(struct TCP_Server_Info *server)
 222 {
 223         return server->max_read == 0;
 224 }
 225
 226 static int
 227 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 228 {
 229         int rc;
 230         ses->server->CurrentMid = 0;
 231         rc = SMB2_negotiate(xid, ses);
 232         /* BB we probably don't need to retry with modern servers */
 233         if (rc == -EAGAIN)
 234                 rc = -EHOSTDOWN;
 235         return rc;
 236 }
 237
 238 static unsigned int
 239 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 240 {
 241         struct TCP_Server_Info *server = tcon->ses->server;
 242         unsigned int wsize;
 243
 244         /* start with specified wsize, or default */
 245         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 246         wsize = min_t(unsigned int, wsize, server->max_write);
 247
 248         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 249                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 250
 251         return wsize;
 252 }
 253
 254 static unsigned int
 255 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 256 {
 257         struct TCP_Server_Info *server = tcon->ses->server;
 258         unsigned int rsize;
 259
 260         /* start with specified rsize, or default */
 261         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 262         rsize = min_t(unsigned int, rsize, server->max_read);
 263
 264         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 265                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 266
 267         return rsize;
 268 }
 269
 270 #ifdef CONFIG_CIFS_STATS2
 271 static int
 272 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 273 {
 274         int rc;
 275         unsigned int ret_data_len = 0;
 276         struct network_interface_info_ioctl_rsp *out_buf;
 277
 278         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 279                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 280                         NULL /* no data input */, 0 /* no data input */,
 281                         (char **)&out_buf, &ret_data_len);
 282         if (rc != 0)
 283                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 284         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
 285                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
 286                 rc = -EINVAL;
 287         } else {
 288                 /* Dump info on first interface */
 289                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 290                         le32_to_cpu(out_buf->Capability));
 291                 cifs_dbg(FYI, "Link Speed %lld\n",
 292                         le64_to_cpu(out_buf->LinkSpeed));
 293         }
 294
 295         return rc;
 296 }
 297 #endif /* STATS2 */
 298
 299 static void
 300 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 301 {
 302         int rc;
 303         __le16 srch_path = 0; /* Null - open root of share */
 304         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 305         struct cifs_open_parms oparms;
 306         struct cifs_fid fid;
 307
 308         oparms.tcon = tcon;
 309         oparms.desired_access = FILE_READ_ATTRIBUTES;
 310         oparms.disposition = FILE_OPEN;
 311         oparms.create_options = 0;
 312         oparms.fid = &fid;
 313         oparms.reconnect = false;
 314
 315         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 316         if (rc)
 317                 return;
 318
 319 #ifdef CONFIG_CIFS_STATS2
 320         SMB3_request_interfaces(xid, tcon);
 321 #endif /* STATS2 */
 322
 323         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 324                         FS_ATTRIBUTE_INFORMATION);
 325         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 326                         FS_DEVICE_INFORMATION);
 327         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 328                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 329         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 330         return;
 331 }
 332
 333 static void
 334 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 335 {
 336         int rc;
 337         __le16 srch_path = 0; /* Null - open root of share */
 338         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 339         struct cifs_open_parms oparms;
 340         struct cifs_fid fid;
 341
 342         oparms.tcon = tcon;
 343         oparms.desired_access = FILE_READ_ATTRIBUTES;
 344         oparms.disposition = FILE_OPEN;
 345         oparms.create_options = 0;
 346         oparms.fid = &fid;
 347         oparms.reconnect = false;
 348
 349         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 350         if (rc)
 351                 return;
 352
 353         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 354                         FS_ATTRIBUTE_INFORMATION);
 355         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 356                         FS_DEVICE_INFORMATION);
 357         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 358         return;
 359 }
 360
 361 static int
 362 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 363                         struct cifs_sb_info *cifs_sb, const char *full_path)
 364 {
 365         int rc;
 366         __le16 *utf16_path;
 367         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 368         struct cifs_open_parms oparms;
 369         struct cifs_fid fid;
 370
 371         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 372         if (!utf16_path)
 373                 return -ENOMEM;
 374
 375         oparms.tcon = tcon;
 376         oparms.desired_access = FILE_READ_ATTRIBUTES;
 377         oparms.disposition = FILE_OPEN;
 378         oparms.create_options = 0;
 379         oparms.fid = &fid;
 380         oparms.reconnect = false;
 381
 382         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 383         if (rc) {
 384                 kfree(utf16_path);
 385                 return rc;
 386         }
 387
 388         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 389         kfree(utf16_path);
 390         return rc;
 391 }
 392
 393 static int
 394 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 395                   struct cifs_sb_info *cifs_sb, const char *full_path,
 396                   u64 *uniqueid, FILE_ALL_INFO *data)
 397 {
 398         *uniqueid = le64_to_cpu(data->IndexNumber);
 399         return 0;
 400 }
 401
 402 static int
 403 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 404                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 405 {
 406         int rc;
 407         struct smb2_file_all_info *smb2_data;
 408
 409         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 410                             GFP_KERNEL);
 411         if (smb2_data == NULL)
 412                 return -ENOMEM;
 413
 414         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 415                              smb2_data);
 416         if (!rc)
 417                 move_smb2_info_to_cifs(data, smb2_data);
 418         kfree(smb2_data);
 419         return rc;
 420 }
 421
 422 static bool
 423 smb2_can_echo(struct TCP_Server_Info *server)
 424 {
 425         return server->echoes;
 426 }
 427
 428 static void
 429 smb2_clear_stats(struct cifs_tcon *tcon)
 430 {
 431 #ifdef CONFIG_CIFS_STATS
 432         int i;
 433         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 434                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 435                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 436         }
 437 #endif
 438 }
 439
 440 static void
 441 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 442 {
 443         seq_puts(m, "\n\tShare Capabilities:");
 444         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 445                 seq_puts(m, " DFS,");
 446         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 447                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 448         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 449                 seq_puts(m, " SCALEOUT,");
 450         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 451                 seq_puts(m, " CLUSTER,");
 452         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 453                 seq_puts(m, " ASYMMETRIC,");
 454         if (tcon->capabilities == 0)
 455                 seq_puts(m, " None");
 456         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 457                 seq_puts(m, " Aligned,");
 458         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 459                 seq_puts(m, " Partition Aligned,");
 460         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 461                 seq_puts(m, " SSD,");
 462         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 463                 seq_puts(m, " TRIM-support,");
 464
 465         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 466         if (tcon->perf_sector_size)
 467                 seq_printf(m, "\tOptimal sector size: 0x%x",
 468                            tcon->perf_sector_size);
 469 }
 470
 471 static void
 472 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 473 {
 474 #ifdef CONFIG_CIFS_STATS
 475         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 476         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 477         seq_printf(m, "\nNegotiates: %d sent %d failed",
 478                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 479                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 480         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 481                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 482                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 483         seq_printf(m, "\nLogoffs: %d sent %d failed",
 484                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 485                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 486         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 487                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 488                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 489         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 490                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 491                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 492         seq_printf(m, "\nCreates: %d sent %d failed",
 493                    atomic_read(&sent[SMB2_CREATE_HE]),
 494                    atomic_read(&failed[SMB2_CREATE_HE]));
 495         seq_printf(m, "\nCloses: %d sent %d failed",
 496                    atomic_read(&sent[SMB2_CLOSE_HE]),
 497                    atomic_read(&failed[SMB2_CLOSE_HE]));
 498         seq_printf(m, "\nFlushes: %d sent %d failed",
 499                    atomic_read(&sent[SMB2_FLUSH_HE]),
 500                    atomic_read(&failed[SMB2_FLUSH_HE]));
 501         seq_printf(m, "\nReads: %d sent %d failed",
 502                    atomic_read(&sent[SMB2_READ_HE]),
 503                    atomic_read(&failed[SMB2_READ_HE]));
 504         seq_printf(m, "\nWrites: %d sent %d failed",
 505                    atomic_read(&sent[SMB2_WRITE_HE]),
 506                    atomic_read(&failed[SMB2_WRITE_HE]));
 507         seq_printf(m, "\nLocks: %d sent %d failed",
 508                    atomic_read(&sent[SMB2_LOCK_HE]),
 509                    atomic_read(&failed[SMB2_LOCK_HE]));
 510         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 511                    atomic_read(&sent[SMB2_IOCTL_HE]),
 512                    atomic_read(&failed[SMB2_IOCTL_HE]));
 513         seq_printf(m, "\nCancels: %d sent %d failed",
 514                    atomic_read(&sent[SMB2_CANCEL_HE]),
 515                    atomic_read(&failed[SMB2_CANCEL_HE]));
 516         seq_printf(m, "\nEchos: %d sent %d failed",
 517                    atomic_read(&sent[SMB2_ECHO_HE]),
 518                    atomic_read(&failed[SMB2_ECHO_HE]));
 519         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 520                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 521                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 522         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 523                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 524                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 525         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 526                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 527                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 528         seq_printf(m, "\nSetInfos: %d sent %d failed",
 529                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 530                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 531         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 532                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 533                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 534 #endif
 535 }
 536
 537 static void
 538 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 539 {
 540         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 541         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 542
 543         cfile->fid.persistent_fid = fid->persistent_fid;
 544         cfile->fid.volatile_fid = fid->volatile_fid;
 545         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 546                                       &fid->purge_cache);
 547         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 548         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 549 }
 550
 551 static void
 552 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 553                 struct cifs_fid *fid)
 554 {
 555         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 556 }
 557
 558 static int
 559 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 560                      u64 persistent_fid, u64 volatile_fid,
 561                      struct copychunk_ioctl *pcchunk)
 562 {
 563         int rc;
 564         unsigned int ret_data_len;
 565         struct resume_key_req *res_key;
 566
 567         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 568                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 569                         NULL, 0 /* no input */,
 570                         (char **)&res_key, &ret_data_len);
 571
 572         if (rc) {
 573                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 574                 goto req_res_key_exit;
 575         }
 576         if (ret_data_len < sizeof(struct resume_key_req)) {
 577                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 578                 rc = -EINVAL;
 579                 goto req_res_key_exit;
 580         }
 581         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 582
 583 req_res_key_exit:
 584         kfree(res_key);
 585         return rc;
 586 }
 587
 588 static int
 589 smb2_clone_range(const unsigned int xid,
 590                         struct cifsFileInfo *srcfile,
 591                         struct cifsFileInfo *trgtfile, u64 src_off,
 592                         u64 len, u64 dest_off)
 593 {
 594         int rc;
 595         unsigned int ret_data_len;
 596         struct copychunk_ioctl *pcchunk;
 597         struct copychunk_ioctl_rsp *retbuf = NULL;
 598         struct cifs_tcon *tcon;
 599         int chunks_copied = 0;
 600         bool chunk_sizes_updated = false;
 601
 602         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 603
 604         if (pcchunk == NULL)
 605                 return -ENOMEM;
 606
 607         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
 608         /* Request a key from the server to identify the source of the copy */
 609         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 610                                 srcfile->fid.persistent_fid,
 611                                 srcfile->fid.volatile_fid, pcchunk);
 612
 613         /* Note: request_res_key sets res_key null only if rc !=0 */
 614         if (rc)
 615                 goto cchunk_out;
 616
 617         /* For now array only one chunk long, will make more flexible later */
 618         pcchunk->ChunkCount = cpu_to_le32(1);
 619         pcchunk->Reserved = 0;
 620         pcchunk->Reserved2 = 0;
 621
 622         tcon = tlink_tcon(trgtfile->tlink);
 623
 624         while (len > 0) {
 625                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 626                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 627                 pcchunk->Length =
 628                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 629
 630                 /* Request server copy to target from src identified by key */
 631                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 632                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 633                         true /* is_fsctl */, (char *)pcchunk,
 634                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 635                         &ret_data_len);
 636                 if (rc == 0) {
 637                         if (ret_data_len !=
 638                                         sizeof(struct copychunk_ioctl_rsp)) {
 639                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 640                                 rc = -EIO;
 641                                 goto cchunk_out;
 642                         }
 643                         if (retbuf->TotalBytesWritten == 0) {
 644                                 cifs_dbg(FYI, "no bytes copied\n");
 645                                 rc = -EIO;
 646                                 goto cchunk_out;
 647                         }
 648                         /*
 649                          * Check if server claimed to write more than we asked
 650                          */
 651                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 652                             le32_to_cpu(pcchunk->Length)) {
 653                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 654                                 rc = -EIO;
 655                                 goto cchunk_out;
 656                         }
 657                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 658                                 cifs_dbg(VFS, "invalid num chunks written\n");
 659                                 rc = -EIO;
 660                                 goto cchunk_out;
 661                         }
 662                         chunks_copied++;
 663
 664                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 665                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 666                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 667
 668                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 669                                 le32_to_cpu(retbuf->ChunksWritten),
 670                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 671                                 le32_to_cpu(retbuf->TotalBytesWritten));
 672                 } else if (rc == -EINVAL) {
 673                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 674                                 goto cchunk_out;
 675
 676                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 677                                 le32_to_cpu(retbuf->ChunksWritten),
 678                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 679                                 le32_to_cpu(retbuf->TotalBytesWritten));
 680
 681                         /*
 682                          * Check if this is the first request using these sizes,
 683                          * (ie check if copy succeed once with original sizes
 684                          * and check if the server gave us different sizes after
 685                          * we already updated max sizes on previous request).
 686                          * if not then why is the server returning an error now
 687                          */
 688                         if ((chunks_copied != 0) || chunk_sizes_updated)
 689                                 goto cchunk_out;
 690
 691                         /* Check that server is not asking us to grow size */
 692                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 693                                         tcon->max_bytes_chunk)
 694                                 tcon->max_bytes_chunk =
 695                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 696                         else
 697                                 goto cchunk_out; /* server gave us bogus size */
 698
 699                         /* No need to change MaxChunks since already set to 1 */
 700                         chunk_sizes_updated = true;
 701                 } else
 702                         goto cchunk_out;
 703         }
 704
 705 cchunk_out:
 706         kfree(pcchunk);
 707         return rc;
 708 }
 709
 710 static int
 711 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 712                 struct cifs_fid *fid)
 713 {
 714         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 715 }
 716
 717 static unsigned int
 718 smb2_read_data_offset(char *buf)
 719 {
 720         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 721         return rsp->DataOffset;
 722 }
 723
 724 static unsigned int
 725 smb2_read_data_length(char *buf)
 726 {
 727         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 728         return le32_to_cpu(rsp->DataLength);
 729 }
 730
 731
 732 static int
 733 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 734                struct cifs_io_parms *parms, unsigned int *bytes_read,
 735                char **buf, int *buf_type)
 736 {
 737         parms->persistent_fid = pfid->persistent_fid;
 738         parms->volatile_fid = pfid->volatile_fid;
 739         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 740 }
 741
 742 static int
 743 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 744                 struct cifs_io_parms *parms, unsigned int *written,
 745                 struct kvec *iov, unsigned long nr_segs)
 746 {
 747
 748         parms->persistent_fid = pfid->persistent_fid;
 749         parms->volatile_fid = pfid->volatile_fid;
 750         return SMB2_write(xid, parms, written, iov, nr_segs);
 751 }
 752
 753 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 754 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 755                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 756 {
 757         struct cifsInodeInfo *cifsi;
 758         int rc;
 759
 760         cifsi = CIFS_I(inode);
 761
 762         /* if file already sparse don't bother setting sparse again */
 763         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
 764                 return true; /* already sparse */
 765
 766         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
 767                 return true; /* already not sparse */
 768
 769         /*
 770          * Can't check for sparse support on share the usual way via the
 771          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
 772          * since Samba server doesn't set the flag on the share, yet
 773          * supports the set sparse FSCTL and returns sparse correctly
 774          * in the file attributes. If we fail setting sparse though we
 775          * mark that server does not support sparse files for this share
 776          * to avoid repeatedly sending the unsupported fsctl to server
 777          * if the file is repeatedly extended.
 778          */
 779         if (tcon->broken_sparse_sup)
 780                 return false;
 781
 782         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 783                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 784                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
 785         if (rc) {
 786                 tcon->broken_sparse_sup = true;
 787                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
 788                 return false;
 789         }
 790
 791         if (setsparse)
 792                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
 793         else
 794                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
 795
 796         return true;
 797 }
 798
 799 static int
 800 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 801                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 802 {
 803         __le64 eof = cpu_to_le64(size);
 804         struct inode *inode;
 805
 806         /*
 807          * If extending file more than one page make sparse. Many Linux fs
 808          * make files sparse by default when extending via ftruncate
 809          */
 810         inode = d_inode(cfile->dentry);
 811
 812         if (!set_alloc && (size > inode->i_size + 8192)) {
 813                 __u8 set_sparse = 1;
 814
 815                 /* whether set sparse succeeds or not, extend the file */
 816                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
 817         }
 818
 819         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 820                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 821 }
 822
 823 static int
 824 smb2_duplicate_extents(const unsigned int xid,
 825                         struct cifsFileInfo *srcfile,
 826                         struct cifsFileInfo *trgtfile, u64 src_off,
 827                         u64 len, u64 dest_off)
 828 {
 829         int rc;
 830         unsigned int ret_data_len;
 831         char *retbuf = NULL;
 832         struct duplicate_extents_to_file dup_ext_buf;
 833         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
 834
 835         /* server fileays advertise duplicate extent support with this flag */
 836         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
 837              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
 838                 return -EOPNOTSUPP;
 839
 840         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
 841         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
 842         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
 843         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
 844         dup_ext_buf.ByteCount = cpu_to_le64(len);
 845         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
 846                 src_off, dest_off, len);
 847
 848         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
 849         if (rc)
 850                 goto duplicate_extents_out;
 851
 852         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 853                         trgtfile->fid.volatile_fid,
 854                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
 855                         true /* is_fsctl */, (char *)&dup_ext_buf,
 856                         sizeof(struct duplicate_extents_to_file),
 857                         (char **)&retbuf,
 858                         &ret_data_len);
 859
 860         if (ret_data_len > 0)
 861                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
 862
 863 duplicate_extents_out:
 864         return rc;
 865 }
 866
 867 static int
 868 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 869                    struct cifsFileInfo *cfile)
 870 {
 871         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 872                             cfile->fid.volatile_fid);
 873 }
 874
 875 static int
 876 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
 877                    struct cifsFileInfo *cfile)
 878 {
 879         struct fsctl_set_integrity_information_req integr_info;
 880         char *retbuf = NULL;
 881         unsigned int ret_data_len;
 882
 883         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
 884         integr_info.Flags = 0;
 885         integr_info.Reserved = 0;
 886
 887         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 888                         cfile->fid.volatile_fid,
 889                         FSCTL_SET_INTEGRITY_INFORMATION,
 890                         true /* is_fsctl */, (char *)&integr_info,
 891                         sizeof(struct fsctl_set_integrity_information_req),
 892                         (char **)&retbuf,
 893                         &ret_data_len);
 894
 895 }
 896
 897 static int
 898 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 899                      const char *path, struct cifs_sb_info *cifs_sb,
 900                      struct cifs_fid *fid, __u16 search_flags,
 901                      struct cifs_search_info *srch_inf)
 902 {
 903         __le16 *utf16_path;
 904         int rc;
 905         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 906         struct cifs_open_parms oparms;
 907
 908         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 909         if (!utf16_path)
 910                 return -ENOMEM;
 911
 912         oparms.tcon = tcon;
 913         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 914         oparms.disposition = FILE_OPEN;
 915         oparms.create_options = 0;
 916         oparms.fid = fid;
 917         oparms.reconnect = false;
 918
 919         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 920         kfree(utf16_path);
 921         if (rc) {
 922                 cifs_dbg(VFS, "open dir failed\n");
 923                 return rc;
 924         }
 925
 926         srch_inf->entries_in_buffer = 0;
 927         srch_inf->index_of_last_entry = 0;
 928
 929         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 930                                   fid->volatile_fid, 0, srch_inf);
 931         if (rc) {
 932                 cifs_dbg(VFS, "query directory failed\n");
 933                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 934         }
 935         return rc;
 936 }
 937
 938 static int
 939 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 940                     struct cifs_fid *fid, __u16 search_flags,
 941                     struct cifs_search_info *srch_inf)
 942 {
 943         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 944                                     fid->volatile_fid, 0, srch_inf);
 945 }
 946
 947 static int
 948 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 949                struct cifs_fid *fid)
 950 {
 951         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 952 }
 953
 954 /*
 955 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 956 * the number of credits and return true. Otherwise - return false.
 957 */
 958 static bool
 959 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 960 {
 961         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 962
 963         if (hdr->Status != STATUS_PENDING)
 964                 return false;
 965
 966         if (!length) {
 967                 spin_lock(&server->req_lock);
 968                 server->credits += le16_to_cpu(hdr->CreditRequest);
 969                 spin_unlock(&server->req_lock);
 970                 wake_up(&server->request_q);
 971         }
 972
 973         return true;
 974 }
 975
 976 static int
 977 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 978                      struct cifsInodeInfo *cinode)
 979 {
 980         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 981                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 982                                         smb2_get_lease_state(cinode));
 983
 984         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 985                                  fid->volatile_fid,
 986                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 987 }
 988
 989 static int
 990 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 991              struct kstatfs *buf)
 992 {
 993         int rc;
 994         __le16 srch_path = 0; /* Null - open root of share */
 995         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 996         struct cifs_open_parms oparms;
 997         struct cifs_fid fid;
 998
 999         oparms.tcon = tcon;
1000         oparms.desired_access = FILE_READ_ATTRIBUTES;
1001         oparms.disposition = FILE_OPEN;
1002         oparms.create_options = 0;
1003         oparms.fid = &fid;
1004         oparms.reconnect = false;
1005
1006         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1007         if (rc)
1008                 return rc;
1009         buf->f_type = SMB2_MAGIC_NUMBER;
1010         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1011                            buf);
1012         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1013         return rc;
1014 }
1015
1016 static bool
1017 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1018 {
1019         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1020                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1021 }
1022
1023 static int
1024 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1025                __u64 length, __u32 type, int lock, int unlock, bool wait)
1026 {
1027         if (unlock && !lock)
1028                 type = SMB2_LOCKFLAG_UNLOCK;
1029         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1030                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1031                          current->tgid, length, offset, type, wait);
1032 }
1033
1034 static void
1035 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1036 {
1037         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1038 }
1039
1040 static void
1041 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1042 {
1043         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1044 }
1045
1046 static void
1047 smb2_new_lease_key(struct cifs_fid *fid)
1048 {
1049         generate_random_uuid(fid->lease_key);
1050 }
1051
1052 #define SMB2_SYMLINK_STRUCT_SIZE \
1053         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1054
1055 static int
1056 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1057                    const char *full_path, char **target_path,
1058                    struct cifs_sb_info *cifs_sb)
1059 {
1060         int rc;
1061         __le16 *utf16_path;
1062         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1063         struct cifs_open_parms oparms;
1064         struct cifs_fid fid;
1065         struct smb2_err_rsp *err_buf = NULL;
1066         struct smb2_symlink_err_rsp *symlink;
1067         unsigned int sub_len;
1068         unsigned int sub_offset;
1069         unsigned int print_len;
1070         unsigned int print_offset;
1071
1072         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1073
1074         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1075         if (!utf16_path)
1076                 return -ENOMEM;
1077
1078         oparms.tcon = tcon;
1079         oparms.desired_access = FILE_READ_ATTRIBUTES;
1080         oparms.disposition = FILE_OPEN;
1081         oparms.create_options = 0;
1082         oparms.fid = &fid;
1083         oparms.reconnect = false;
1084
1085         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1086
1087         if (!rc || !err_buf) {
1088                 kfree(utf16_path);
1089                 return -ENOENT;
1090         }
1091
1092         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1093             get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1094                 kfree(utf16_path);
1095                 return -ENOENT;
1096         }
1097
1098         /* open must fail on symlink - reset rc */
1099         rc = 0;
1100         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1101         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1102         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1103         print_len = le16_to_cpu(symlink->PrintNameLength);
1104         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1105
1106         if (get_rfc1002_length(err_buf) + 4 <
1107                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1108                 kfree(utf16_path);
1109                 return -ENOENT;
1110         }
1111
1112         if (get_rfc1002_length(err_buf) + 4 <
1113                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1114                 kfree(utf16_path);
1115                 return -ENOENT;
1116         }
1117
1118         *target_path = cifs_strndup_from_utf16(
1119                                 (char *)symlink->PathBuffer + sub_offset,
1120                                 sub_len, true, cifs_sb->local_nls);
1121         if (!(*target_path)) {
1122                 kfree(utf16_path);
1123                 return -ENOMEM;
1124         }
1125         convert_delimiter(*target_path, '/');
1126         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1127         kfree(utf16_path);
1128         return rc;
1129 }
1130
1131 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1132                             loff_t offset, loff_t len, bool keep_size)
1133 {
1134         struct inode *inode;
1135         struct cifsInodeInfo *cifsi;
1136         struct cifsFileInfo *cfile = file->private_data;
1137         struct file_zero_data_information fsctl_buf;
1138         long rc;
1139         unsigned int xid;
1140
1141         xid = get_xid();
1142
1143         inode = d_inode(cfile->dentry);
1144         cifsi = CIFS_I(inode);
1145
1146         /* if file not oplocked can't be sure whether asking to extend size */
1147         if (!CIFS_CACHE_READ(cifsi))
1148                 if (keep_size == false)
1149                         return -EOPNOTSUPP;
1150
1151         /*
1152          * Must check if file sparse since fallocate -z (zero range) assumes
1153          * non-sparse allocation
1154          */
1155         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1156                 return -EOPNOTSUPP;
1157
1158         /*
1159          * need to make sure we are not asked to extend the file since the SMB3
1160          * fsctl does not change the file size. In the future we could change
1161          * this to zero the first part of the range then set the file size
1162          * which for a non sparse file would zero the newly extended range
1163          */
1164         if (keep_size == false)
1165                 if (i_size_read(inode) < offset + len)
1166                         return -EOPNOTSUPP;
1167
1168         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1169
1170         fsctl_buf.FileOffset = cpu_to_le64(offset);
1171         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1172
1173         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1174                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1175                         true /* is_fctl */, (char *)&fsctl_buf,
1176                         sizeof(struct file_zero_data_information), NULL, NULL);
1177         free_xid(xid);
1178         return rc;
1179 }
1180
1181 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1182                             loff_t offset, loff_t len)
1183 {
1184         struct inode *inode;
1185         struct cifsInodeInfo *cifsi;
1186         struct cifsFileInfo *cfile = file->private_data;
1187         struct file_zero_data_information fsctl_buf;
1188         long rc;
1189         unsigned int xid;
1190         __u8 set_sparse = 1;
1191
1192         xid = get_xid();
1193
1194         inode = d_inode(cfile->dentry);
1195         cifsi = CIFS_I(inode);
1196
1197         /* Need to make file sparse, if not already, before freeing range. */
1198         /* Consider adding equivalent for compressed since it could also work */
1199         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1200                 return -EOPNOTSUPP;
1201
1202         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1203
1204         fsctl_buf.FileOffset = cpu_to_le64(offset);
1205         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1206
1207         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1208                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1209                         true /* is_fctl */, (char *)&fsctl_buf,
1210                         sizeof(struct file_zero_data_information), NULL, NULL);
1211         free_xid(xid);
1212         return rc;
1213 }
1214
1215 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1216                             loff_t off, loff_t len, bool keep_size)
1217 {
1218         struct inode *inode;
1219         struct cifsInodeInfo *cifsi;
1220         struct cifsFileInfo *cfile = file->private_data;
1221         long rc = -EOPNOTSUPP;
1222         unsigned int xid;
1223
1224         xid = get_xid();
1225
1226         inode = d_inode(cfile->dentry);
1227         cifsi = CIFS_I(inode);
1228
1229         /* if file not oplocked can't be sure whether asking to extend size */
1230         if (!CIFS_CACHE_READ(cifsi))
1231                 if (keep_size == false)
1232                         return -EOPNOTSUPP;
1233
1234         /*
1235          * Files are non-sparse by default so falloc may be a no-op
1236          * Must check if file sparse. If not sparse, and not extending
1237          * then no need to do anything since file already allocated
1238          */
1239         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1240                 if (keep_size == true)
1241                         return 0;
1242                 /* check if extending file */
1243                 else if (i_size_read(inode) >= off + len)
1244                         /* not extending file and already not sparse */
1245                         return 0;
1246                 /* BB: in future add else clause to extend file */
1247                 else
1248                         return -EOPNOTSUPP;
1249         }
1250
1251         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1252                 /*
1253                  * Check if falloc starts within first few pages of file
1254                  * and ends within a few pages of the end of file to
1255                  * ensure that most of file is being forced to be
1256                  * fallocated now. If so then setting whole file sparse
1257                  * ie potentially making a few extra pages at the beginning
1258                  * or end of the file non-sparse via set_sparse is harmless.
1259                  */
1260                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1261                         return -EOPNOTSUPP;
1262
1263                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1264         }
1265         /* BB: else ... in future add code to extend file and set sparse */
1266
1267
1268         free_xid(xid);
1269         return rc;
1270 }
1271
1272
1273 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1274                            loff_t off, loff_t len)
1275 {
1276         /* KEEP_SIZE already checked for by do_fallocate */
1277         if (mode & FALLOC_FL_PUNCH_HOLE)
1278                 return smb3_punch_hole(file, tcon, off, len);
1279         else if (mode & FALLOC_FL_ZERO_RANGE) {
1280                 if (mode & FALLOC_FL_KEEP_SIZE)
1281                         return smb3_zero_range(file, tcon, off, len, true);
1282                 return smb3_zero_range(file, tcon, off, len, false);
1283         } else if (mode == FALLOC_FL_KEEP_SIZE)
1284                 return smb3_simple_falloc(file, tcon, off, len, true);
1285         else if (mode == 0)
1286                 return smb3_simple_falloc(file, tcon, off, len, false);
1287
1288         return -EOPNOTSUPP;
1289 }
1290
1291 static void
1292 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1293                         struct cifsInodeInfo *cinode, bool set_level2)
1294 {
1295         if (set_level2)
1296                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1297                                                 0, NULL);
1298         else
1299                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1300 }
1301
1302 static void
1303 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1304                       unsigned int epoch, bool *purge_cache)
1305 {
1306         oplock &= 0xFF;
1307         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1308                 return;
1309         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1310                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1311                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1312                          &cinode->vfs_inode);
1313         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1314                 cinode->oplock = CIFS_CACHE_RW_FLG;
1315                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1316                          &cinode->vfs_inode);
1317         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1318                 cinode->oplock = CIFS_CACHE_READ_FLG;
1319                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1320                          &cinode->vfs_inode);
1321         } else
1322                 cinode->oplock = 0;
1323 }
1324
1325 static void
1326 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1327                        unsigned int epoch, bool *purge_cache)
1328 {
1329         char message[5] = {0};
1330
1331         oplock &= 0xFF;
1332         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1333                 return;
1334
1335         cinode->oplock = 0;
1336         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1337                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1338                 strcat(message, "R");
1339         }
1340         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1341                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1342                 strcat(message, "H");
1343         }
1344         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1345                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1346                 strcat(message, "W");
1347         }
1348         if (!cinode->oplock)
1349                 strcat(message, "None");
1350         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1351                  &cinode->vfs_inode);
1352 }
1353
1354 static void
1355 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1356                       unsigned int epoch, bool *purge_cache)
1357 {
1358         unsigned int old_oplock = cinode->oplock;
1359
1360         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1361
1362         if (purge_cache) {
1363                 *purge_cache = false;
1364                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1365                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1366                             (epoch - cinode->epoch > 0))
1367                                 *purge_cache = true;
1368                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1369                                  (epoch - cinode->epoch > 1))
1370                                 *purge_cache = true;
1371                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1372                                  (epoch - cinode->epoch > 1))
1373                                 *purge_cache = true;
1374                         else if (cinode->oplock == 0 &&
1375                                  (epoch - cinode->epoch > 0))
1376                                 *purge_cache = true;
1377                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1378                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1379                             (epoch - cinode->epoch > 0))
1380                                 *purge_cache = true;
1381                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1382                                  (epoch - cinode->epoch > 1))
1383                                 *purge_cache = true;
1384                 }
1385                 cinode->epoch = epoch;
1386         }
1387 }
1388
1389 static bool
1390 smb2_is_read_op(__u32 oplock)
1391 {
1392         return oplock == SMB2_OPLOCK_LEVEL_II;
1393 }
1394
1395 static bool
1396 smb21_is_read_op(__u32 oplock)
1397 {
1398         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1399                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1400 }
1401
1402 static __le32
1403 map_oplock_to_lease(u8 oplock)
1404 {
1405         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1406                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1407         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1408                 return SMB2_LEASE_READ_CACHING;
1409         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1410                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1411                        SMB2_LEASE_WRITE_CACHING;
1412         return 0;
1413 }
1414
1415 static char *
1416 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1417 {
1418         struct create_lease *buf;
1419
1420         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1421         if (!buf)
1422                 return NULL;
1423
1424         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1425         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1426         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1427
1428         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1429                                         (struct create_lease, lcontext));
1430         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1431         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1432                                 (struct create_lease, Name));
1433         buf->ccontext.NameLength = cpu_to_le16(4);
1434         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1435         buf->Name[0] = 'R';
1436         buf->Name[1] = 'q';
1437         buf->Name[2] = 'L';
1438         buf->Name[3] = 's';
1439         return (char *)buf;
1440 }
1441
1442 static char *
1443 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1444 {
1445         struct create_lease_v2 *buf;
1446
1447         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1448         if (!buf)
1449                 return NULL;
1450
1451         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1452         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1453         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1454
1455         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1456                                         (struct create_lease_v2, lcontext));
1457         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1458         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1459                                 (struct create_lease_v2, Name));
1460         buf->ccontext.NameLength = cpu_to_le16(4);
1461         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1462         buf->Name[0] = 'R';
1463         buf->Name[1] = 'q';
1464         buf->Name[2] = 'L';
1465         buf->Name[3] = 's';
1466         return (char *)buf;
1467 }
1468
1469 static __u8
1470 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1471 {
1472         struct create_lease *lc = (struct create_lease *)buf;
1473
1474         *epoch = 0; /* not used */
1475         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1476                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1477         return le32_to_cpu(lc->lcontext.LeaseState);
1478 }
1479
1480 static __u8
1481 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1482 {
1483         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1484
1485         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1486         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1487                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1488         return le32_to_cpu(lc->lcontext.LeaseState);
1489 }
1490
1491 static unsigned int
1492 smb2_wp_retry_size(struct inode *inode)
1493 {
1494         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1495                      SMB2_MAX_BUFFER_SIZE);
1496 }
1497
1498 static bool
1499 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1500 {
1501         return !cfile->invalidHandle;
1502 }
1503
1504 struct smb_version_operations smb20_operations = {
1505         .compare_fids = smb2_compare_fids,
1506         .setup_request = smb2_setup_request,
1507         .setup_async_request = smb2_setup_async_request,
1508         .check_receive = smb2_check_receive,
1509         .add_credits = smb2_add_credits,
1510         .set_credits = smb2_set_credits,
1511         .get_credits_field = smb2_get_credits_field,
1512         .get_credits = smb2_get_credits,
1513         .wait_mtu_credits = cifs_wait_mtu_credits,
1514         .get_next_mid = smb2_get_next_mid,
1515         .read_data_offset = smb2_read_data_offset,
1516         .read_data_length = smb2_read_data_length,
1517         .map_error = map_smb2_to_linux_error,
1518         .find_mid = smb2_find_mid,
1519         .check_message = smb2_check_message,
1520         .dump_detail = smb2_dump_detail,
1521         .clear_stats = smb2_clear_stats,
1522         .print_stats = smb2_print_stats,
1523         .is_oplock_break = smb2_is_valid_oplock_break,
1524         .downgrade_oplock = smb2_downgrade_oplock,
1525         .need_neg = smb2_need_neg,
1526         .negotiate = smb2_negotiate,
1527         .negotiate_wsize = smb2_negotiate_wsize,
1528         .negotiate_rsize = smb2_negotiate_rsize,
1529         .sess_setup = SMB2_sess_setup,
1530         .logoff = SMB2_logoff,
1531         .tree_connect = SMB2_tcon,
1532         .tree_disconnect = SMB2_tdis,
1533         .qfs_tcon = smb2_qfs_tcon,
1534         .is_path_accessible = smb2_is_path_accessible,
1535         .can_echo = smb2_can_echo,
1536         .echo = SMB2_echo,
1537         .query_path_info = smb2_query_path_info,
1538         .get_srv_inum = smb2_get_srv_inum,
1539         .query_file_info = smb2_query_file_info,
1540         .set_path_size = smb2_set_path_size,
1541         .set_file_size = smb2_set_file_size,
1542         .set_file_info = smb2_set_file_info,
1543         .set_compression = smb2_set_compression,
1544         .mkdir = smb2_mkdir,
1545         .mkdir_setinfo = smb2_mkdir_setinfo,
1546         .rmdir = smb2_rmdir,
1547         .unlink = smb2_unlink,
1548         .rename = smb2_rename_path,
1549         .create_hardlink = smb2_create_hardlink,
1550         .query_symlink = smb2_query_symlink,
1551         .query_mf_symlink = smb3_query_mf_symlink,
1552         .create_mf_symlink = smb3_create_mf_symlink,
1553         .open = smb2_open_file,
1554         .set_fid = smb2_set_fid,
1555         .close = smb2_close_file,
1556         .flush = smb2_flush_file,
1557         .async_readv = smb2_async_readv,
1558         .async_writev = smb2_async_writev,
1559         .sync_read = smb2_sync_read,
1560         .sync_write = smb2_sync_write,
1561         .query_dir_first = smb2_query_dir_first,
1562         .query_dir_next = smb2_query_dir_next,
1563         .close_dir = smb2_close_dir,
1564         .calc_smb_size = smb2_calc_size,
1565         .is_status_pending = smb2_is_status_pending,
1566         .oplock_response = smb2_oplock_response,
1567         .queryfs = smb2_queryfs,
1568         .mand_lock = smb2_mand_lock,
1569         .mand_unlock_range = smb2_unlock_range,
1570         .push_mand_locks = smb2_push_mandatory_locks,
1571         .get_lease_key = smb2_get_lease_key,
1572         .set_lease_key = smb2_set_lease_key,
1573         .new_lease_key = smb2_new_lease_key,
1574         .calc_signature = smb2_calc_signature,
1575         .is_read_op = smb2_is_read_op,
1576         .set_oplock_level = smb2_set_oplock_level,
1577         .create_lease_buf = smb2_create_lease_buf,
1578         .parse_lease_buf = smb2_parse_lease_buf,
1579         .clone_range = smb2_clone_range,
1580         .wp_retry_size = smb2_wp_retry_size,
1581         .dir_needs_close = smb2_dir_needs_close,
1582 };
1583
1584 struct smb_version_operations smb21_operations = {
1585         .compare_fids = smb2_compare_fids,
1586         .setup_request = smb2_setup_request,
1587         .setup_async_request = smb2_setup_async_request,
1588         .check_receive = smb2_check_receive,
1589         .add_credits = smb2_add_credits,
1590         .set_credits = smb2_set_credits,
1591         .get_credits_field = smb2_get_credits_field,
1592         .get_credits = smb2_get_credits,
1593         .wait_mtu_credits = smb2_wait_mtu_credits,
1594         .get_next_mid = smb2_get_next_mid,
1595         .read_data_offset = smb2_read_data_offset,
1596         .read_data_length = smb2_read_data_length,
1597         .map_error = map_smb2_to_linux_error,
1598         .find_mid = smb2_find_mid,
1599         .check_message = smb2_check_message,
1600         .dump_detail = smb2_dump_detail,
1601         .clear_stats = smb2_clear_stats,
1602         .print_stats = smb2_print_stats,
1603         .is_oplock_break = smb2_is_valid_oplock_break,
1604         .downgrade_oplock = smb2_downgrade_oplock,
1605         .need_neg = smb2_need_neg,
1606         .negotiate = smb2_negotiate,
1607         .negotiate_wsize = smb2_negotiate_wsize,
1608         .negotiate_rsize = smb2_negotiate_rsize,
1609         .sess_setup = SMB2_sess_setup,
1610         .logoff = SMB2_logoff,
1611         .tree_connect = SMB2_tcon,
1612         .tree_disconnect = SMB2_tdis,
1613         .qfs_tcon = smb2_qfs_tcon,
1614         .is_path_accessible = smb2_is_path_accessible,
1615         .can_echo = smb2_can_echo,
1616         .echo = SMB2_echo,
1617         .query_path_info = smb2_query_path_info,
1618         .get_srv_inum = smb2_get_srv_inum,
1619         .query_file_info = smb2_query_file_info,
1620         .set_path_size = smb2_set_path_size,
1621         .set_file_size = smb2_set_file_size,
1622         .set_file_info = smb2_set_file_info,
1623         .set_compression = smb2_set_compression,
1624         .mkdir = smb2_mkdir,
1625         .mkdir_setinfo = smb2_mkdir_setinfo,
1626         .rmdir = smb2_rmdir,
1627         .unlink = smb2_unlink,
1628         .rename = smb2_rename_path,
1629         .create_hardlink = smb2_create_hardlink,
1630         .query_symlink = smb2_query_symlink,
1631         .query_mf_symlink = smb3_query_mf_symlink,
1632         .create_mf_symlink = smb3_create_mf_symlink,
1633         .open = smb2_open_file,
1634         .set_fid = smb2_set_fid,
1635         .close = smb2_close_file,
1636         .flush = smb2_flush_file,
1637         .async_readv = smb2_async_readv,
1638         .async_writev = smb2_async_writev,
1639         .sync_read = smb2_sync_read,
1640         .sync_write = smb2_sync_write,
1641         .query_dir_first = smb2_query_dir_first,
1642         .query_dir_next = smb2_query_dir_next,
1643         .close_dir = smb2_close_dir,
1644         .calc_smb_size = smb2_calc_size,
1645         .is_status_pending = smb2_is_status_pending,
1646         .oplock_response = smb2_oplock_response,
1647         .queryfs = smb2_queryfs,
1648         .mand_lock = smb2_mand_lock,
1649         .mand_unlock_range = smb2_unlock_range,
1650         .push_mand_locks = smb2_push_mandatory_locks,
1651         .get_lease_key = smb2_get_lease_key,
1652         .set_lease_key = smb2_set_lease_key,
1653         .new_lease_key = smb2_new_lease_key,
1654         .calc_signature = smb2_calc_signature,
1655         .is_read_op = smb21_is_read_op,
1656         .set_oplock_level = smb21_set_oplock_level,
1657         .create_lease_buf = smb2_create_lease_buf,
1658         .parse_lease_buf = smb2_parse_lease_buf,
1659         .clone_range = smb2_clone_range,
1660         .wp_retry_size = smb2_wp_retry_size,
1661         .dir_needs_close = smb2_dir_needs_close,
1662 };
1663
1664 struct smb_version_operations smb30_operations = {
1665         .compare_fids = smb2_compare_fids,
1666         .setup_request = smb2_setup_request,
1667         .setup_async_request = smb2_setup_async_request,
1668         .check_receive = smb2_check_receive,
1669         .add_credits = smb2_add_credits,
1670         .set_credits = smb2_set_credits,
1671         .get_credits_field = smb2_get_credits_field,
1672         .get_credits = smb2_get_credits,
1673         .wait_mtu_credits = smb2_wait_mtu_credits,
1674         .get_next_mid = smb2_get_next_mid,
1675         .read_data_offset = smb2_read_data_offset,
1676         .read_data_length = smb2_read_data_length,
1677         .map_error = map_smb2_to_linux_error,
1678         .find_mid = smb2_find_mid,
1679         .check_message = smb2_check_message,
1680         .dump_detail = smb2_dump_detail,
1681         .clear_stats = smb2_clear_stats,
1682         .print_stats = smb2_print_stats,
1683         .dump_share_caps = smb2_dump_share_caps,
1684         .is_oplock_break = smb2_is_valid_oplock_break,
1685         .downgrade_oplock = smb2_downgrade_oplock,
1686         .need_neg = smb2_need_neg,
1687         .negotiate = smb2_negotiate,
1688         .negotiate_wsize = smb2_negotiate_wsize,
1689         .negotiate_rsize = smb2_negotiate_rsize,
1690         .sess_setup = SMB2_sess_setup,
1691         .logoff = SMB2_logoff,
1692         .tree_connect = SMB2_tcon,
1693         .tree_disconnect = SMB2_tdis,
1694         .qfs_tcon = smb3_qfs_tcon,
1695         .is_path_accessible = smb2_is_path_accessible,
1696         .can_echo = smb2_can_echo,
1697         .echo = SMB2_echo,
1698         .query_path_info = smb2_query_path_info,
1699         .get_srv_inum = smb2_get_srv_inum,
1700         .query_file_info = smb2_query_file_info,
1701         .set_path_size = smb2_set_path_size,
1702         .set_file_size = smb2_set_file_size,
1703         .set_file_info = smb2_set_file_info,
1704         .set_compression = smb2_set_compression,
1705         .mkdir = smb2_mkdir,
1706         .mkdir_setinfo = smb2_mkdir_setinfo,
1707         .rmdir = smb2_rmdir,
1708         .unlink = smb2_unlink,
1709         .rename = smb2_rename_path,
1710         .create_hardlink = smb2_create_hardlink,
1711         .query_symlink = smb2_query_symlink,
1712         .query_mf_symlink = smb3_query_mf_symlink,
1713         .create_mf_symlink = smb3_create_mf_symlink,
1714         .open = smb2_open_file,
1715         .set_fid = smb2_set_fid,
1716         .close = smb2_close_file,
1717         .flush = smb2_flush_file,
1718         .async_readv = smb2_async_readv,
1719         .async_writev = smb2_async_writev,
1720         .sync_read = smb2_sync_read,
1721         .sync_write = smb2_sync_write,
1722         .query_dir_first = smb2_query_dir_first,
1723         .query_dir_next = smb2_query_dir_next,
1724         .close_dir = smb2_close_dir,
1725         .calc_smb_size = smb2_calc_size,
1726         .is_status_pending = smb2_is_status_pending,
1727         .oplock_response = smb2_oplock_response,
1728         .queryfs = smb2_queryfs,
1729         .mand_lock = smb2_mand_lock,
1730         .mand_unlock_range = smb2_unlock_range,
1731         .push_mand_locks = smb2_push_mandatory_locks,
1732         .get_lease_key = smb2_get_lease_key,
1733         .set_lease_key = smb2_set_lease_key,
1734         .new_lease_key = smb2_new_lease_key,
1735         .generate_signingkey = generate_smb30signingkey,
1736         .calc_signature = smb3_calc_signature,
1737         .set_integrity  = smb3_set_integrity,
1738         .is_read_op = smb21_is_read_op,
1739         .set_oplock_level = smb3_set_oplock_level,
1740         .create_lease_buf = smb3_create_lease_buf,
1741         .parse_lease_buf = smb3_parse_lease_buf,
1742         .clone_range = smb2_clone_range,
1743         .duplicate_extents = smb2_duplicate_extents,
1744         .validate_negotiate = smb3_validate_negotiate,
1745         .wp_retry_size = smb2_wp_retry_size,
1746         .dir_needs_close = smb2_dir_needs_close,
1747         .fallocate = smb3_fallocate,
1748 };
1749
1750 #ifdef CONFIG_CIFS_SMB311
1751 struct smb_version_operations smb311_operations = {
1752         .compare_fids = smb2_compare_fids,
1753         .setup_request = smb2_setup_request,
1754         .setup_async_request = smb2_setup_async_request,
1755         .check_receive = smb2_check_receive,
1756         .add_credits = smb2_add_credits,
1757         .set_credits = smb2_set_credits,
1758         .get_credits_field = smb2_get_credits_field,
1759         .get_credits = smb2_get_credits,
1760         .wait_mtu_credits = smb2_wait_mtu_credits,
1761         .get_next_mid = smb2_get_next_mid,
1762         .read_data_offset = smb2_read_data_offset,
1763         .read_data_length = smb2_read_data_length,
1764         .map_error = map_smb2_to_linux_error,
1765         .find_mid = smb2_find_mid,
1766         .check_message = smb2_check_message,
1767         .dump_detail = smb2_dump_detail,
1768         .clear_stats = smb2_clear_stats,
1769         .print_stats = smb2_print_stats,
1770         .dump_share_caps = smb2_dump_share_caps,
1771         .is_oplock_break = smb2_is_valid_oplock_break,
1772         .downgrade_oplock = smb2_downgrade_oplock,
1773         .need_neg = smb2_need_neg,
1774         .negotiate = smb2_negotiate,
1775         .negotiate_wsize = smb2_negotiate_wsize,
1776         .negotiate_rsize = smb2_negotiate_rsize,
1777         .sess_setup = SMB2_sess_setup,
1778         .logoff = SMB2_logoff,
1779         .tree_connect = SMB2_tcon,
1780         .tree_disconnect = SMB2_tdis,
1781         .qfs_tcon = smb3_qfs_tcon,
1782         .is_path_accessible = smb2_is_path_accessible,
1783         .can_echo = smb2_can_echo,
1784         .echo = SMB2_echo,
1785         .query_path_info = smb2_query_path_info,
1786         .get_srv_inum = smb2_get_srv_inum,
1787         .query_file_info = smb2_query_file_info,
1788         .set_path_size = smb2_set_path_size,
1789         .set_file_size = smb2_set_file_size,
1790         .set_file_info = smb2_set_file_info,
1791         .set_compression = smb2_set_compression,
1792         .mkdir = smb2_mkdir,
1793         .mkdir_setinfo = smb2_mkdir_setinfo,
1794         .rmdir = smb2_rmdir,
1795         .unlink = smb2_unlink,
1796         .rename = smb2_rename_path,
1797         .create_hardlink = smb2_create_hardlink,
1798         .query_symlink = smb2_query_symlink,
1799         .query_mf_symlink = smb3_query_mf_symlink,
1800         .create_mf_symlink = smb3_create_mf_symlink,
1801         .open = smb2_open_file,
1802         .set_fid = smb2_set_fid,
1803         .close = smb2_close_file,
1804         .flush = smb2_flush_file,
1805         .async_readv = smb2_async_readv,
1806         .async_writev = smb2_async_writev,
1807         .sync_read = smb2_sync_read,
1808         .sync_write = smb2_sync_write,
1809         .query_dir_first = smb2_query_dir_first,
1810         .query_dir_next = smb2_query_dir_next,
1811         .close_dir = smb2_close_dir,
1812         .calc_smb_size = smb2_calc_size,
1813         .is_status_pending = smb2_is_status_pending,
1814         .oplock_response = smb2_oplock_response,
1815         .queryfs = smb2_queryfs,
1816         .mand_lock = smb2_mand_lock,
1817         .mand_unlock_range = smb2_unlock_range,
1818         .push_mand_locks = smb2_push_mandatory_locks,
1819         .get_lease_key = smb2_get_lease_key,
1820         .set_lease_key = smb2_set_lease_key,
1821         .new_lease_key = smb2_new_lease_key,
1822         .generate_signingkey = generate_smb311signingkey,
1823         .calc_signature = smb3_calc_signature,
1824         .set_integrity  = smb3_set_integrity,
1825         .is_read_op = smb21_is_read_op,
1826         .set_oplock_level = smb3_set_oplock_level,
1827         .create_lease_buf = smb3_create_lease_buf,
1828         .parse_lease_buf = smb3_parse_lease_buf,
1829         .clone_range = smb2_clone_range,
1830         .duplicate_extents = smb2_duplicate_extents,
1831 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1832         .wp_retry_size = smb2_wp_retry_size,
1833         .dir_needs_close = smb2_dir_needs_close,
1834         .fallocate = smb3_fallocate,
1835 };
1836 #endif /* CIFS_SMB311 */
1837
1838 struct smb_version_values smb20_values = {
1839         .version_string = SMB20_VERSION_STRING,
1840         .protocol_id = SMB20_PROT_ID,
1841         .req_capabilities = 0, /* MBZ */
1842         .large_lock_type = 0,
1843         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1844         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1845         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1846         .header_size = sizeof(struct smb2_hdr),
1847         .max_header_size = MAX_SMB2_HDR_SIZE,
1848         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1849         .lock_cmd = SMB2_LOCK,
1850         .cap_unix = 0,
1851         .cap_nt_find = SMB2_NT_FIND,
1852         .cap_large_files = SMB2_LARGE_FILES,
1853         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1854         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1855         .create_lease_size = sizeof(struct create_lease),
1856 };
1857
1858 struct smb_version_values smb21_values = {
1859         .version_string = SMB21_VERSION_STRING,
1860         .protocol_id = SMB21_PROT_ID,
1861         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1862         .large_lock_type = 0,
1863         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1864         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1865         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1866         .header_size = sizeof(struct smb2_hdr),
1867         .max_header_size = MAX_SMB2_HDR_SIZE,
1868         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1869         .lock_cmd = SMB2_LOCK,
1870         .cap_unix = 0,
1871         .cap_nt_find = SMB2_NT_FIND,
1872         .cap_large_files = SMB2_LARGE_FILES,
1873         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1874         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1875         .create_lease_size = sizeof(struct create_lease),
1876 };
1877
1878 struct smb_version_values smb30_values = {
1879         .version_string = SMB30_VERSION_STRING,
1880         .protocol_id = SMB30_PROT_ID,
1881         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
1882         .large_lock_type = 0,
1883         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1884         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1885         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1886         .header_size = sizeof(struct smb2_hdr),
1887         .max_header_size = MAX_SMB2_HDR_SIZE,
1888         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1889         .lock_cmd = SMB2_LOCK,
1890         .cap_unix = 0,
1891         .cap_nt_find = SMB2_NT_FIND,
1892         .cap_large_files = SMB2_LARGE_FILES,
1893         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1894         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1895         .create_lease_size = sizeof(struct create_lease_v2),
1896 };
1897
1898 struct smb_version_values smb302_values = {
1899         .version_string = SMB302_VERSION_STRING,
1900         .protocol_id = SMB302_PROT_ID,
1901         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
1902         .large_lock_type = 0,
1903         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1904         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1905         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1906         .header_size = sizeof(struct smb2_hdr),
1907         .max_header_size = MAX_SMB2_HDR_SIZE,
1908         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1909         .lock_cmd = SMB2_LOCK,
1910         .cap_unix = 0,
1911         .cap_nt_find = SMB2_NT_FIND,
1912         .cap_large_files = SMB2_LARGE_FILES,
1913         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1914         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1915         .create_lease_size = sizeof(struct create_lease_v2),
1916 };
1917
1918 #ifdef CONFIG_CIFS_SMB311
1919 struct smb_version_values smb311_values = {
1920         .version_string = SMB311_VERSION_STRING,
1921         .protocol_id = SMB311_PROT_ID,
1922         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1923         .large_lock_type = 0,
1924         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1925         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1926         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1927         .header_size = sizeof(struct smb2_hdr),
1928         .max_header_size = MAX_SMB2_HDR_SIZE,
1929         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1930         .lock_cmd = SMB2_LOCK,
1931         .cap_unix = 0,
1932         .cap_nt_find = SMB2_NT_FIND,
1933         .cap_large_files = SMB2_LARGE_FILES,
1934         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1935         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1936         .create_lease_size = sizeof(struct create_lease_v2),
1937 };
1938 #endif /* SMB311 */