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                 server->oplocks = true;
  54                 server->echo_credits = 1;
  55                 server->oplock_credits = 1;
  56         }
  57         server->credits -= server->echo_credits + server->oplock_credits;
  58         return 0;
  59 }
  60
  61 static void
  62 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  63                  const int optype)
  64 {
  65         int *val, rc = 0;
  66         spin_lock(&server->req_lock);
  67         val = server->ops->get_credits_field(server, optype);
  68         *val += add;
  69         server->in_flight--;
  70         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  71                 rc = change_conf(server);
  72         /*
  73          * Sometimes server returns 0 credits on oplock break ack - we need to
  74          * rebalance credits in this case.
  75          */
  76         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  77                  server->oplocks) {
  78                 if (server->credits > 1) {
  79                         server->credits--;
  80                         server->oplock_credits++;
  81                 }
  82         }
  83         spin_unlock(&server->req_lock);
  84         wake_up(&server->request_q);
  85         if (rc)
  86                 cifs_reconnect(server);
  87 }
  88
  89 static void
  90 smb2_set_credits(struct TCP_Server_Info *server, const int val)
  91 {
  92         spin_lock(&server->req_lock);
  93         server->credits = val;
  94         spin_unlock(&server->req_lock);
  95 }
  96
  97 static int *
  98 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
  99 {
 100         switch (optype) {
 101         case CIFS_ECHO_OP:
 102                 return &server->echo_credits;
 103         case CIFS_OBREAK_OP:
 104                 return &server->oplock_credits;
 105         default:
 106                 return &server->credits;
 107         }
 108 }
 109
 110 static unsigned int
 111 smb2_get_credits(struct mid_q_entry *mid)
 112 {
 113         return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
 114 }
 115
 116 static int
 117 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 118                       unsigned int *num, unsigned int *credits)
 119 {
 120         int rc = 0;
 121         unsigned int scredits;
 122
 123         spin_lock(&server->req_lock);
 124         while (1) {
 125                 if (server->credits <= 0) {
 126                         spin_unlock(&server->req_lock);
 127                         cifs_num_waiters_inc(server);
 128                         rc = wait_event_killable(server->request_q,
 129                                         has_credits(server, &server->credits));
 130                         cifs_num_waiters_dec(server);
 131                         if (rc)
 132                                 return rc;
 133                         spin_lock(&server->req_lock);
 134                 } else {
 135                         if (server->tcpStatus == CifsExiting) {
 136                                 spin_unlock(&server->req_lock);
 137                                 return -ENOENT;
 138                         }
 139
 140                         scredits = server->credits;
 141                         /* can deadlock with reopen */
 142                         if (scredits == 1) {
 143                                 *num = SMB2_MAX_BUFFER_SIZE;
 144                                 *credits = 0;
 145                                 break;
 146                         }
 147
 148                         /* leave one credit for a possible reopen */
 149                         scredits--;
 150                         *num = min_t(unsigned int, size,
 151                                      scredits * SMB2_MAX_BUFFER_SIZE);
 152
 153                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 154                         server->credits -= *credits;
 155                         server->in_flight++;
 156                         break;
 157                 }
 158         }
 159         spin_unlock(&server->req_lock);
 160         return rc;
 161 }
 162
 163 static __u64
 164 smb2_get_next_mid(struct TCP_Server_Info *server)
 165 {
 166         __u64 mid;
 167         /* for SMB2 we need the current value */
 168         spin_lock(&GlobalMid_Lock);
 169         mid = server->CurrentMid++;
 170         spin_unlock(&GlobalMid_Lock);
 171         return mid;
 172 }
 173
 174 static struct mid_q_entry *
 175 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 176 {
 177         struct mid_q_entry *mid;
 178         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 179
 180         spin_lock(&GlobalMid_Lock);
 181         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 182                 if ((mid->mid == hdr->MessageId) &&
 183                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 184                     (mid->command == hdr->Command)) {
 185                         spin_unlock(&GlobalMid_Lock);
 186                         return mid;
 187                 }
 188         }
 189         spin_unlock(&GlobalMid_Lock);
 190         return NULL;
 191 }
 192
 193 static void
 194 smb2_dump_detail(void *buf)
 195 {
 196 #ifdef CONFIG_CIFS_DEBUG2
 197         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 198
 199         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 200                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 201                  smb->ProcessId);
 202         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
 203 #endif
 204 }
 205
 206 static bool
 207 smb2_need_neg(struct TCP_Server_Info *server)
 208 {
 209         return server->max_read == 0;
 210 }
 211
 212 static int
 213 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 214 {
 215         int rc;
 216         ses->server->CurrentMid = 0;
 217         rc = SMB2_negotiate(xid, ses);
 218         /* BB we probably don't need to retry with modern servers */
 219         if (rc == -EAGAIN)
 220                 rc = -EHOSTDOWN;
 221         return rc;
 222 }
 223
 224 static unsigned int
 225 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 226 {
 227         struct TCP_Server_Info *server = tcon->ses->server;
 228         unsigned int wsize;
 229
 230         /* start with specified wsize, or default */
 231         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 232         wsize = min_t(unsigned int, wsize, server->max_write);
 233
 234         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 235                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 236
 237         return wsize;
 238 }
 239
 240 static unsigned int
 241 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 242 {
 243         struct TCP_Server_Info *server = tcon->ses->server;
 244         unsigned int rsize;
 245
 246         /* start with specified rsize, or default */
 247         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 248         rsize = min_t(unsigned int, rsize, server->max_read);
 249
 250         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 251                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 252
 253         return rsize;
 254 }
 255
 256 #ifdef CONFIG_CIFS_STATS2
 257 static int
 258 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 259 {
 260         int rc;
 261         unsigned int ret_data_len = 0;
 262         struct network_interface_info_ioctl_rsp *out_buf;
 263
 264         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 265                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 266                         NULL /* no data input */, 0 /* no data input */,
 267                         (char **)&out_buf, &ret_data_len);
 268         if (rc != 0)
 269                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 270         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
 271                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
 272                 rc = -EINVAL;
 273         } else {
 274                 /* Dump info on first interface */
 275                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 276                         le32_to_cpu(out_buf->Capability));
 277                 cifs_dbg(FYI, "Link Speed %lld\n",
 278                         le64_to_cpu(out_buf->LinkSpeed));
 279         }
 280
 281         return rc;
 282 }
 283 #endif /* STATS2 */
 284
 285 static void
 286 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 287 {
 288         int rc;
 289         __le16 srch_path = 0; /* Null - open root of share */
 290         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 291         struct cifs_open_parms oparms;
 292         struct cifs_fid fid;
 293
 294         oparms.tcon = tcon;
 295         oparms.desired_access = FILE_READ_ATTRIBUTES;
 296         oparms.disposition = FILE_OPEN;
 297         oparms.create_options = 0;
 298         oparms.fid = &fid;
 299         oparms.reconnect = false;
 300
 301         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 302         if (rc)
 303                 return;
 304
 305 #ifdef CONFIG_CIFS_STATS2
 306         SMB3_request_interfaces(xid, tcon);
 307 #endif /* STATS2 */
 308
 309         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 310                         FS_ATTRIBUTE_INFORMATION);
 311         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 312                         FS_DEVICE_INFORMATION);
 313         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 314                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 315         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 316         return;
 317 }
 318
 319 static void
 320 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 321 {
 322         int rc;
 323         __le16 srch_path = 0; /* Null - open root of share */
 324         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 325         struct cifs_open_parms oparms;
 326         struct cifs_fid fid;
 327
 328         oparms.tcon = tcon;
 329         oparms.desired_access = FILE_READ_ATTRIBUTES;
 330         oparms.disposition = FILE_OPEN;
 331         oparms.create_options = 0;
 332         oparms.fid = &fid;
 333         oparms.reconnect = false;
 334
 335         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 336         if (rc)
 337                 return;
 338
 339         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 340                         FS_ATTRIBUTE_INFORMATION);
 341         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 342                         FS_DEVICE_INFORMATION);
 343         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 344         return;
 345 }
 346
 347 static int
 348 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 349                         struct cifs_sb_info *cifs_sb, const char *full_path)
 350 {
 351         int rc;
 352         __le16 *utf16_path;
 353         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 354         struct cifs_open_parms oparms;
 355         struct cifs_fid fid;
 356
 357         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 358         if (!utf16_path)
 359                 return -ENOMEM;
 360
 361         oparms.tcon = tcon;
 362         oparms.desired_access = FILE_READ_ATTRIBUTES;
 363         oparms.disposition = FILE_OPEN;
 364         oparms.create_options = 0;
 365         oparms.fid = &fid;
 366         oparms.reconnect = false;
 367
 368         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 369         if (rc) {
 370                 kfree(utf16_path);
 371                 return rc;
 372         }
 373
 374         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 375         kfree(utf16_path);
 376         return rc;
 377 }
 378
 379 static int
 380 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 381                   struct cifs_sb_info *cifs_sb, const char *full_path,
 382                   u64 *uniqueid, FILE_ALL_INFO *data)
 383 {
 384         *uniqueid = le64_to_cpu(data->IndexNumber);
 385         return 0;
 386 }
 387
 388 static int
 389 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 390                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 391 {
 392         int rc;
 393         struct smb2_file_all_info *smb2_data;
 394
 395         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 396                             GFP_KERNEL);
 397         if (smb2_data == NULL)
 398                 return -ENOMEM;
 399
 400         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 401                              smb2_data);
 402         if (!rc)
 403                 move_smb2_info_to_cifs(data, smb2_data);
 404         kfree(smb2_data);
 405         return rc;
 406 }
 407
 408 static bool
 409 smb2_can_echo(struct TCP_Server_Info *server)
 410 {
 411         return server->echoes;
 412 }
 413
 414 static void
 415 smb2_clear_stats(struct cifs_tcon *tcon)
 416 {
 417 #ifdef CONFIG_CIFS_STATS
 418         int i;
 419         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 420                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 421                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 422         }
 423 #endif
 424 }
 425
 426 static void
 427 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 428 {
 429         seq_puts(m, "\n\tShare Capabilities:");
 430         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 431                 seq_puts(m, " DFS,");
 432         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 433                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 434         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 435                 seq_puts(m, " SCALEOUT,");
 436         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 437                 seq_puts(m, " CLUSTER,");
 438         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 439                 seq_puts(m, " ASYMMETRIC,");
 440         if (tcon->capabilities == 0)
 441                 seq_puts(m, " None");
 442         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 443                 seq_puts(m, " Aligned,");
 444         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 445                 seq_puts(m, " Partition Aligned,");
 446         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 447                 seq_puts(m, " SSD,");
 448         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 449                 seq_puts(m, " TRIM-support,");
 450
 451         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 452         if (tcon->perf_sector_size)
 453                 seq_printf(m, "\tOptimal sector size: 0x%x",
 454                            tcon->perf_sector_size);
 455 }
 456
 457 static void
 458 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 459 {
 460 #ifdef CONFIG_CIFS_STATS
 461         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 462         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 463         seq_printf(m, "\nNegotiates: %d sent %d failed",
 464                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 465                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 466         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 467                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 468                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 469         seq_printf(m, "\nLogoffs: %d sent %d failed",
 470                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 471                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 472         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 473                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 474                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 475         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 476                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 477                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 478         seq_printf(m, "\nCreates: %d sent %d failed",
 479                    atomic_read(&sent[SMB2_CREATE_HE]),
 480                    atomic_read(&failed[SMB2_CREATE_HE]));
 481         seq_printf(m, "\nCloses: %d sent %d failed",
 482                    atomic_read(&sent[SMB2_CLOSE_HE]),
 483                    atomic_read(&failed[SMB2_CLOSE_HE]));
 484         seq_printf(m, "\nFlushes: %d sent %d failed",
 485                    atomic_read(&sent[SMB2_FLUSH_HE]),
 486                    atomic_read(&failed[SMB2_FLUSH_HE]));
 487         seq_printf(m, "\nReads: %d sent %d failed",
 488                    atomic_read(&sent[SMB2_READ_HE]),
 489                    atomic_read(&failed[SMB2_READ_HE]));
 490         seq_printf(m, "\nWrites: %d sent %d failed",
 491                    atomic_read(&sent[SMB2_WRITE_HE]),
 492                    atomic_read(&failed[SMB2_WRITE_HE]));
 493         seq_printf(m, "\nLocks: %d sent %d failed",
 494                    atomic_read(&sent[SMB2_LOCK_HE]),
 495                    atomic_read(&failed[SMB2_LOCK_HE]));
 496         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 497                    atomic_read(&sent[SMB2_IOCTL_HE]),
 498                    atomic_read(&failed[SMB2_IOCTL_HE]));
 499         seq_printf(m, "\nCancels: %d sent %d failed",
 500                    atomic_read(&sent[SMB2_CANCEL_HE]),
 501                    atomic_read(&failed[SMB2_CANCEL_HE]));
 502         seq_printf(m, "\nEchos: %d sent %d failed",
 503                    atomic_read(&sent[SMB2_ECHO_HE]),
 504                    atomic_read(&failed[SMB2_ECHO_HE]));
 505         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 506                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 507                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 508         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 509                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 510                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 511         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 512                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 513                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 514         seq_printf(m, "\nSetInfos: %d sent %d failed",
 515                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 516                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 517         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 518                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 519                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 520 #endif
 521 }
 522
 523 static void
 524 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 525 {
 526         struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
 527         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 528
 529         cfile->fid.persistent_fid = fid->persistent_fid;
 530         cfile->fid.volatile_fid = fid->volatile_fid;
 531         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 532                                       &fid->purge_cache);
 533         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 534 }
 535
 536 static void
 537 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 538                 struct cifs_fid *fid)
 539 {
 540         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 541 }
 542
 543 static int
 544 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 545                      u64 persistent_fid, u64 volatile_fid,
 546                      struct copychunk_ioctl *pcchunk)
 547 {
 548         int rc;
 549         unsigned int ret_data_len;
 550         struct resume_key_req *res_key;
 551
 552         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 553                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 554                         NULL, 0 /* no input */,
 555                         (char **)&res_key, &ret_data_len);
 556
 557         if (rc) {
 558                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 559                 goto req_res_key_exit;
 560         }
 561         if (ret_data_len < sizeof(struct resume_key_req)) {
 562                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 563                 rc = -EINVAL;
 564                 goto req_res_key_exit;
 565         }
 566         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 567
 568 req_res_key_exit:
 569         kfree(res_key);
 570         return rc;
 571 }
 572
 573 static int
 574 smb2_clone_range(const unsigned int xid,
 575                         struct cifsFileInfo *srcfile,
 576                         struct cifsFileInfo *trgtfile, u64 src_off,
 577                         u64 len, u64 dest_off)
 578 {
 579         int rc;
 580         unsigned int ret_data_len;
 581         struct copychunk_ioctl *pcchunk;
 582         struct copychunk_ioctl_rsp *retbuf = NULL;
 583         struct cifs_tcon *tcon;
 584         int chunks_copied = 0;
 585         bool chunk_sizes_updated = false;
 586
 587         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 588
 589         if (pcchunk == NULL)
 590                 return -ENOMEM;
 591
 592         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
 593         /* Request a key from the server to identify the source of the copy */
 594         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 595                                 srcfile->fid.persistent_fid,
 596                                 srcfile->fid.volatile_fid, pcchunk);
 597
 598         /* Note: request_res_key sets res_key null only if rc !=0 */
 599         if (rc)
 600                 goto cchunk_out;
 601
 602         /* For now array only one chunk long, will make more flexible later */
 603         pcchunk->ChunkCount = cpu_to_le32(1);
 604         pcchunk->Reserved = 0;
 605         pcchunk->Reserved2 = 0;
 606
 607         tcon = tlink_tcon(trgtfile->tlink);
 608
 609         while (len > 0) {
 610                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 611                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 612                 pcchunk->Length =
 613                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 614
 615                 /* Request server copy to target from src identified by key */
 616                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 617                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 618                         true /* is_fsctl */, (char *)pcchunk,
 619                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 620                         &ret_data_len);
 621                 if (rc == 0) {
 622                         if (ret_data_len !=
 623                                         sizeof(struct copychunk_ioctl_rsp)) {
 624                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 625                                 rc = -EIO;
 626                                 goto cchunk_out;
 627                         }
 628                         if (retbuf->TotalBytesWritten == 0) {
 629                                 cifs_dbg(FYI, "no bytes copied\n");
 630                                 rc = -EIO;
 631                                 goto cchunk_out;
 632                         }
 633                         /*
 634                          * Check if server claimed to write more than we asked
 635                          */
 636                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 637                             le32_to_cpu(pcchunk->Length)) {
 638                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 639                                 rc = -EIO;
 640                                 goto cchunk_out;
 641                         }
 642                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 643                                 cifs_dbg(VFS, "invalid num chunks written\n");
 644                                 rc = -EIO;
 645                                 goto cchunk_out;
 646                         }
 647                         chunks_copied++;
 648
 649                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 650                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 651                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 652
 653                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 654                                 le32_to_cpu(retbuf->ChunksWritten),
 655                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 656                                 le32_to_cpu(retbuf->TotalBytesWritten));
 657                 } else if (rc == -EINVAL) {
 658                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 659                                 goto cchunk_out;
 660
 661                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 662                                 le32_to_cpu(retbuf->ChunksWritten),
 663                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 664                                 le32_to_cpu(retbuf->TotalBytesWritten));
 665
 666                         /*
 667                          * Check if this is the first request using these sizes,
 668                          * (ie check if copy succeed once with original sizes
 669                          * and check if the server gave us different sizes after
 670                          * we already updated max sizes on previous request).
 671                          * if not then why is the server returning an error now
 672                          */
 673                         if ((chunks_copied != 0) || chunk_sizes_updated)
 674                                 goto cchunk_out;
 675
 676                         /* Check that server is not asking us to grow size */
 677                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 678                                         tcon->max_bytes_chunk)
 679                                 tcon->max_bytes_chunk =
 680                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 681                         else
 682                                 goto cchunk_out; /* server gave us bogus size */
 683
 684                         /* No need to change MaxChunks since already set to 1 */
 685                         chunk_sizes_updated = true;
 686                 }
 687         }
 688
 689 cchunk_out:
 690         kfree(pcchunk);
 691         return rc;
 692 }
 693
 694 static int
 695 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 696                 struct cifs_fid *fid)
 697 {
 698         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 699 }
 700
 701 static unsigned int
 702 smb2_read_data_offset(char *buf)
 703 {
 704         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 705         return rsp->DataOffset;
 706 }
 707
 708 static unsigned int
 709 smb2_read_data_length(char *buf)
 710 {
 711         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 712         return le32_to_cpu(rsp->DataLength);
 713 }
 714
 715
 716 static int
 717 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 718                struct cifs_io_parms *parms, unsigned int *bytes_read,
 719                char **buf, int *buf_type)
 720 {
 721         parms->persistent_fid = pfid->persistent_fid;
 722         parms->volatile_fid = pfid->volatile_fid;
 723         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 724 }
 725
 726 static int
 727 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 728                 struct cifs_io_parms *parms, unsigned int *written,
 729                 struct kvec *iov, unsigned long nr_segs)
 730 {
 731
 732         parms->persistent_fid = pfid->persistent_fid;
 733         parms->volatile_fid = pfid->volatile_fid;
 734         return SMB2_write(xid, parms, written, iov, nr_segs);
 735 }
 736
 737 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 738 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 739                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 740 {
 741         struct cifsInodeInfo *cifsi;
 742         int rc;
 743
 744         cifsi = CIFS_I(inode);
 745
 746         /* if file already sparse don't bother setting sparse again */
 747         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
 748                 return true; /* already sparse */
 749
 750         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
 751                 return true; /* already not sparse */
 752
 753         /*
 754          * Can't check for sparse support on share the usual way via the
 755          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
 756          * since Samba server doesn't set the flag on the share, yet
 757          * supports the set sparse FSCTL and returns sparse correctly
 758          * in the file attributes. If we fail setting sparse though we
 759          * mark that server does not support sparse files for this share
 760          * to avoid repeatedly sending the unsupported fsctl to server
 761          * if the file is repeatedly extended.
 762          */
 763         if (tcon->broken_sparse_sup)
 764                 return false;
 765
 766         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 767                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 768                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
 769         if (rc) {
 770                 tcon->broken_sparse_sup = true;
 771                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
 772                 return false;
 773         }
 774
 775         if (setsparse)
 776                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
 777         else
 778                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
 779
 780         return true;
 781 }
 782
 783 static int
 784 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 785                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 786 {
 787         __le64 eof = cpu_to_le64(size);
 788         struct inode *inode;
 789
 790         /*
 791          * If extending file more than one page make sparse. Many Linux fs
 792          * make files sparse by default when extending via ftruncate
 793          */
 794         inode = cfile->dentry->d_inode;
 795
 796         if (!set_alloc && (size > inode->i_size + 8192)) {
 797                 __u8 set_sparse = 1;
 798
 799                 /* whether set sparse succeeds or not, extend the file */
 800                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
 801         }
 802
 803         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 804                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 805 }
 806
 807 static int
 808 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 809                    struct cifsFileInfo *cfile)
 810 {
 811         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 812                             cfile->fid.volatile_fid);
 813 }
 814
 815 static int
 816 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 817                      const char *path, struct cifs_sb_info *cifs_sb,
 818                      struct cifs_fid *fid, __u16 search_flags,
 819                      struct cifs_search_info *srch_inf)
 820 {
 821         __le16 *utf16_path;
 822         int rc;
 823         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 824         struct cifs_open_parms oparms;
 825
 826         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 827         if (!utf16_path)
 828                 return -ENOMEM;
 829
 830         oparms.tcon = tcon;
 831         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 832         oparms.disposition = FILE_OPEN;
 833         oparms.create_options = 0;
 834         oparms.fid = fid;
 835         oparms.reconnect = false;
 836
 837         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 838         kfree(utf16_path);
 839         if (rc) {
 840                 cifs_dbg(VFS, "open dir failed\n");
 841                 return rc;
 842         }
 843
 844         srch_inf->entries_in_buffer = 0;
 845         srch_inf->index_of_last_entry = 0;
 846
 847         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 848                                   fid->volatile_fid, 0, srch_inf);
 849         if (rc) {
 850                 cifs_dbg(VFS, "query directory failed\n");
 851                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 852         }
 853         return rc;
 854 }
 855
 856 static int
 857 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 858                     struct cifs_fid *fid, __u16 search_flags,
 859                     struct cifs_search_info *srch_inf)
 860 {
 861         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 862                                     fid->volatile_fid, 0, srch_inf);
 863 }
 864
 865 static int
 866 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 867                struct cifs_fid *fid)
 868 {
 869         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 870 }
 871
 872 /*
 873 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 874 * the number of credits and return true. Otherwise - return false.
 875 */
 876 static bool
 877 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 878 {
 879         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 880
 881         if (hdr->Status != STATUS_PENDING)
 882                 return false;
 883
 884         if (!length) {
 885                 spin_lock(&server->req_lock);
 886                 server->credits += le16_to_cpu(hdr->CreditRequest);
 887                 spin_unlock(&server->req_lock);
 888                 wake_up(&server->request_q);
 889         }
 890
 891         return true;
 892 }
 893
 894 static int
 895 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 896                      struct cifsInodeInfo *cinode)
 897 {
 898         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 899                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 900                                         smb2_get_lease_state(cinode));
 901
 902         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 903                                  fid->volatile_fid,
 904                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 905 }
 906
 907 static int
 908 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 909              struct kstatfs *buf)
 910 {
 911         int rc;
 912         __le16 srch_path = 0; /* Null - open root of share */
 913         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 914         struct cifs_open_parms oparms;
 915         struct cifs_fid fid;
 916
 917         oparms.tcon = tcon;
 918         oparms.desired_access = FILE_READ_ATTRIBUTES;
 919         oparms.disposition = FILE_OPEN;
 920         oparms.create_options = 0;
 921         oparms.fid = &fid;
 922         oparms.reconnect = false;
 923
 924         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 925         if (rc)
 926                 return rc;
 927         buf->f_type = SMB2_MAGIC_NUMBER;
 928         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 929                            buf);
 930         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 931         return rc;
 932 }
 933
 934 static bool
 935 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
 936 {
 937         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
 938                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
 939 }
 940
 941 static int
 942 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 943                __u64 length, __u32 type, int lock, int unlock, bool wait)
 944 {
 945         if (unlock && !lock)
 946                 type = SMB2_LOCKFLAG_UNLOCK;
 947         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
 948                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
 949                          current->tgid, length, offset, type, wait);
 950 }
 951
 952 static void
 953 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
 954 {
 955         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
 956 }
 957
 958 static void
 959 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
 960 {
 961         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
 962 }
 963
 964 static void
 965 smb2_new_lease_key(struct cifs_fid *fid)
 966 {
 967         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
 968 }
 969
 970 static int
 971 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
 972                    const char *full_path, char **target_path,
 973                    struct cifs_sb_info *cifs_sb)
 974 {
 975         int rc;
 976         __le16 *utf16_path;
 977         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 978         struct cifs_open_parms oparms;
 979         struct cifs_fid fid;
 980         struct smb2_err_rsp *err_buf = NULL;
 981         struct smb2_symlink_err_rsp *symlink;
 982         unsigned int sub_len, sub_offset;
 983
 984         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
 985
 986         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 987         if (!utf16_path)
 988                 return -ENOMEM;
 989
 990         oparms.tcon = tcon;
 991         oparms.desired_access = FILE_READ_ATTRIBUTES;
 992         oparms.disposition = FILE_OPEN;
 993         oparms.create_options = 0;
 994         oparms.fid = &fid;
 995         oparms.reconnect = false;
 996
 997         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
 998
 999         if (!rc || !err_buf) {
1000                 kfree(utf16_path);
1001                 return -ENOENT;
1002         }
1003         /* open must fail on symlink - reset rc */
1004         rc = 0;
1005         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1006         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1007         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1008         *target_path = cifs_strndup_from_utf16(
1009                                 (char *)symlink->PathBuffer + sub_offset,
1010                                 sub_len, true, cifs_sb->local_nls);
1011         if (!(*target_path)) {
1012                 kfree(utf16_path);
1013                 return -ENOMEM;
1014         }
1015         convert_delimiter(*target_path, '/');
1016         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1017         kfree(utf16_path);
1018         return rc;
1019 }
1020
1021 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1022                             loff_t offset, loff_t len, bool keep_size)
1023 {
1024         struct inode *inode;
1025         struct cifsInodeInfo *cifsi;
1026         struct cifsFileInfo *cfile = file->private_data;
1027         struct file_zero_data_information fsctl_buf;
1028         long rc;
1029         unsigned int xid;
1030
1031         xid = get_xid();
1032
1033         inode = cfile->dentry->d_inode;
1034         cifsi = CIFS_I(inode);
1035
1036         /* if file not oplocked can't be sure whether asking to extend size */
1037         if (!CIFS_CACHE_READ(cifsi))
1038                 if (keep_size == false)
1039                         return -EOPNOTSUPP;
1040
1041         /*
1042          * Must check if file sparse since fallocate -z (zero range) assumes
1043          * non-sparse allocation
1044          */
1045         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1046                 return -EOPNOTSUPP;
1047
1048         /*
1049          * need to make sure we are not asked to extend the file since the SMB3
1050          * fsctl does not change the file size. In the future we could change
1051          * this to zero the first part of the range then set the file size
1052          * which for a non sparse file would zero the newly extended range
1053          */
1054         if (keep_size == false)
1055                 if (i_size_read(inode) < offset + len)
1056                         return -EOPNOTSUPP;
1057
1058         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1059
1060         fsctl_buf.FileOffset = cpu_to_le64(offset);
1061         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1062
1063         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1064                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1065                         true /* is_fctl */, (char *)&fsctl_buf,
1066                         sizeof(struct file_zero_data_information), NULL, NULL);
1067         free_xid(xid);
1068         return rc;
1069 }
1070
1071 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1072                             loff_t offset, loff_t len)
1073 {
1074         struct inode *inode;
1075         struct cifsInodeInfo *cifsi;
1076         struct cifsFileInfo *cfile = file->private_data;
1077         struct file_zero_data_information fsctl_buf;
1078         long rc;
1079         unsigned int xid;
1080         __u8 set_sparse = 1;
1081
1082         xid = get_xid();
1083
1084         inode = cfile->dentry->d_inode;
1085         cifsi = CIFS_I(inode);
1086
1087         /* Need to make file sparse, if not already, before freeing range. */
1088         /* Consider adding equivalent for compressed since it could also work */
1089         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1090                 return -EOPNOTSUPP;
1091
1092         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1093
1094         fsctl_buf.FileOffset = cpu_to_le64(offset);
1095         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1096
1097         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1098                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1099                         true /* is_fctl */, (char *)&fsctl_buf,
1100                         sizeof(struct file_zero_data_information), NULL, NULL);
1101         free_xid(xid);
1102         return rc;
1103 }
1104
1105 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1106                             loff_t off, loff_t len, bool keep_size)
1107 {
1108         struct inode *inode;
1109         struct cifsInodeInfo *cifsi;
1110         struct cifsFileInfo *cfile = file->private_data;
1111         long rc = -EOPNOTSUPP;
1112         unsigned int xid;
1113
1114         xid = get_xid();
1115
1116         inode = cfile->dentry->d_inode;
1117         cifsi = CIFS_I(inode);
1118
1119         /* if file not oplocked can't be sure whether asking to extend size */
1120         if (!CIFS_CACHE_READ(cifsi))
1121                 if (keep_size == false)
1122                         return -EOPNOTSUPP;
1123
1124         /*
1125          * Files are non-sparse by default so falloc may be a no-op
1126          * Must check if file sparse. If not sparse, and not extending
1127          * then no need to do anything since file already allocated
1128          */
1129         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1130                 if (keep_size == true)
1131                         return 0;
1132                 /* check if extending file */
1133                 else if (i_size_read(inode) >= off + len)
1134                         /* not extending file and already not sparse */
1135                         return 0;
1136                 /* BB: in future add else clause to extend file */
1137                 else
1138                         return -EOPNOTSUPP;
1139         }
1140
1141         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1142                 /*
1143                  * Check if falloc starts within first few pages of file
1144                  * and ends within a few pages of the end of file to
1145                  * ensure that most of file is being forced to be
1146                  * fallocated now. If so then setting whole file sparse
1147                  * ie potentially making a few extra pages at the beginning
1148                  * or end of the file non-sparse via set_sparse is harmless.
1149                  */
1150                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1151                         return -EOPNOTSUPP;
1152
1153                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1154         }
1155         /* BB: else ... in future add code to extend file and set sparse */
1156
1157
1158         free_xid(xid);
1159         return rc;
1160 }
1161
1162
1163 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1164                            loff_t off, loff_t len)
1165 {
1166         /* KEEP_SIZE already checked for by do_fallocate */
1167         if (mode & FALLOC_FL_PUNCH_HOLE)
1168                 return smb3_punch_hole(file, tcon, off, len);
1169         else if (mode & FALLOC_FL_ZERO_RANGE) {
1170                 if (mode & FALLOC_FL_KEEP_SIZE)
1171                         return smb3_zero_range(file, tcon, off, len, true);
1172                 return smb3_zero_range(file, tcon, off, len, false);
1173         } else if (mode == FALLOC_FL_KEEP_SIZE)
1174                 return smb3_simple_falloc(file, tcon, off, len, true);
1175         else if (mode == 0)
1176                 return smb3_simple_falloc(file, tcon, off, len, false);
1177
1178         return -EOPNOTSUPP;
1179 }
1180
1181 static void
1182 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1183                         struct cifsInodeInfo *cinode, bool set_level2)
1184 {
1185         if (set_level2)
1186                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1187                                                 0, NULL);
1188         else
1189                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1190 }
1191
1192 static void
1193 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1194                       unsigned int epoch, bool *purge_cache)
1195 {
1196         oplock &= 0xFF;
1197         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1198                 return;
1199         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1200                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1201                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1202                          &cinode->vfs_inode);
1203         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1204                 cinode->oplock = CIFS_CACHE_RW_FLG;
1205                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1206                          &cinode->vfs_inode);
1207         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1208                 cinode->oplock = CIFS_CACHE_READ_FLG;
1209                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1210                          &cinode->vfs_inode);
1211         } else
1212                 cinode->oplock = 0;
1213 }
1214
1215 static void
1216 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1217                        unsigned int epoch, bool *purge_cache)
1218 {
1219         char message[5] = {0};
1220
1221         oplock &= 0xFF;
1222         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1223                 return;
1224
1225         cinode->oplock = 0;
1226         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1227                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1228                 strcat(message, "R");
1229         }
1230         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1231                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1232                 strcat(message, "H");
1233         }
1234         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1235                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1236                 strcat(message, "W");
1237         }
1238         if (!cinode->oplock)
1239                 strcat(message, "None");
1240         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1241                  &cinode->vfs_inode);
1242 }
1243
1244 static void
1245 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1246                       unsigned int epoch, bool *purge_cache)
1247 {
1248         unsigned int old_oplock = cinode->oplock;
1249
1250         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1251
1252         if (purge_cache) {
1253                 *purge_cache = false;
1254                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1255                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1256                             (epoch - cinode->epoch > 0))
1257                                 *purge_cache = true;
1258                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1259                                  (epoch - cinode->epoch > 1))
1260                                 *purge_cache = true;
1261                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1262                                  (epoch - cinode->epoch > 1))
1263                                 *purge_cache = true;
1264                         else if (cinode->oplock == 0 &&
1265                                  (epoch - cinode->epoch > 0))
1266                                 *purge_cache = true;
1267                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1268                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1269                             (epoch - cinode->epoch > 0))
1270                                 *purge_cache = true;
1271                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1272                                  (epoch - cinode->epoch > 1))
1273                                 *purge_cache = true;
1274                 }
1275                 cinode->epoch = epoch;
1276         }
1277 }
1278
1279 static bool
1280 smb2_is_read_op(__u32 oplock)
1281 {
1282         return oplock == SMB2_OPLOCK_LEVEL_II;
1283 }
1284
1285 static bool
1286 smb21_is_read_op(__u32 oplock)
1287 {
1288         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1289                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1290 }
1291
1292 static __le32
1293 map_oplock_to_lease(u8 oplock)
1294 {
1295         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1296                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1297         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1298                 return SMB2_LEASE_READ_CACHING;
1299         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1300                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1301                        SMB2_LEASE_WRITE_CACHING;
1302         return 0;
1303 }
1304
1305 static char *
1306 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1307 {
1308         struct create_lease *buf;
1309
1310         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1311         if (!buf)
1312                 return NULL;
1313
1314         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1315         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1316         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1317
1318         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1319                                         (struct create_lease, lcontext));
1320         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1321         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1322                                 (struct create_lease, Name));
1323         buf->ccontext.NameLength = cpu_to_le16(4);
1324         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1325         buf->Name[0] = 'R';
1326         buf->Name[1] = 'q';
1327         buf->Name[2] = 'L';
1328         buf->Name[3] = 's';
1329         return (char *)buf;
1330 }
1331
1332 static char *
1333 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1334 {
1335         struct create_lease_v2 *buf;
1336
1337         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1338         if (!buf)
1339                 return NULL;
1340
1341         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1342         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1343         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1344
1345         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1346                                         (struct create_lease_v2, lcontext));
1347         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1348         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1349                                 (struct create_lease_v2, Name));
1350         buf->ccontext.NameLength = cpu_to_le16(4);
1351         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1352         buf->Name[0] = 'R';
1353         buf->Name[1] = 'q';
1354         buf->Name[2] = 'L';
1355         buf->Name[3] = 's';
1356         return (char *)buf;
1357 }
1358
1359 static __u8
1360 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1361 {
1362         struct create_lease *lc = (struct create_lease *)buf;
1363
1364         *epoch = 0; /* not used */
1365         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1366                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1367         return le32_to_cpu(lc->lcontext.LeaseState);
1368 }
1369
1370 static __u8
1371 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1372 {
1373         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1374
1375         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1376         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1377                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1378         return le32_to_cpu(lc->lcontext.LeaseState);
1379 }
1380
1381 static unsigned int
1382 smb2_wp_retry_size(struct inode *inode)
1383 {
1384         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1385                      SMB2_MAX_BUFFER_SIZE);
1386 }
1387
1388 static bool
1389 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1390 {
1391         return !cfile->invalidHandle;
1392 }
1393
1394 struct smb_version_operations smb20_operations = {
1395         .compare_fids = smb2_compare_fids,
1396         .setup_request = smb2_setup_request,
1397         .setup_async_request = smb2_setup_async_request,
1398         .check_receive = smb2_check_receive,
1399         .add_credits = smb2_add_credits,
1400         .set_credits = smb2_set_credits,
1401         .get_credits_field = smb2_get_credits_field,
1402         .get_credits = smb2_get_credits,
1403         .wait_mtu_credits = cifs_wait_mtu_credits,
1404         .get_next_mid = smb2_get_next_mid,
1405         .read_data_offset = smb2_read_data_offset,
1406         .read_data_length = smb2_read_data_length,
1407         .map_error = map_smb2_to_linux_error,
1408         .find_mid = smb2_find_mid,
1409         .check_message = smb2_check_message,
1410         .dump_detail = smb2_dump_detail,
1411         .clear_stats = smb2_clear_stats,
1412         .print_stats = smb2_print_stats,
1413         .is_oplock_break = smb2_is_valid_oplock_break,
1414         .downgrade_oplock = smb2_downgrade_oplock,
1415         .need_neg = smb2_need_neg,
1416         .negotiate = smb2_negotiate,
1417         .negotiate_wsize = smb2_negotiate_wsize,
1418         .negotiate_rsize = smb2_negotiate_rsize,
1419         .sess_setup = SMB2_sess_setup,
1420         .logoff = SMB2_logoff,
1421         .tree_connect = SMB2_tcon,
1422         .tree_disconnect = SMB2_tdis,
1423         .qfs_tcon = smb2_qfs_tcon,
1424         .is_path_accessible = smb2_is_path_accessible,
1425         .can_echo = smb2_can_echo,
1426         .echo = SMB2_echo,
1427         .query_path_info = smb2_query_path_info,
1428         .get_srv_inum = smb2_get_srv_inum,
1429         .query_file_info = smb2_query_file_info,
1430         .set_path_size = smb2_set_path_size,
1431         .set_file_size = smb2_set_file_size,
1432         .set_file_info = smb2_set_file_info,
1433         .set_compression = smb2_set_compression,
1434         .mkdir = smb2_mkdir,
1435         .mkdir_setinfo = smb2_mkdir_setinfo,
1436         .rmdir = smb2_rmdir,
1437         .unlink = smb2_unlink,
1438         .rename = smb2_rename_path,
1439         .create_hardlink = smb2_create_hardlink,
1440         .query_symlink = smb2_query_symlink,
1441         .open = smb2_open_file,
1442         .set_fid = smb2_set_fid,
1443         .close = smb2_close_file,
1444         .flush = smb2_flush_file,
1445         .async_readv = smb2_async_readv,
1446         .async_writev = smb2_async_writev,
1447         .sync_read = smb2_sync_read,
1448         .sync_write = smb2_sync_write,
1449         .query_dir_first = smb2_query_dir_first,
1450         .query_dir_next = smb2_query_dir_next,
1451         .close_dir = smb2_close_dir,
1452         .calc_smb_size = smb2_calc_size,
1453         .is_status_pending = smb2_is_status_pending,
1454         .oplock_response = smb2_oplock_response,
1455         .queryfs = smb2_queryfs,
1456         .mand_lock = smb2_mand_lock,
1457         .mand_unlock_range = smb2_unlock_range,
1458         .push_mand_locks = smb2_push_mandatory_locks,
1459         .get_lease_key = smb2_get_lease_key,
1460         .set_lease_key = smb2_set_lease_key,
1461         .new_lease_key = smb2_new_lease_key,
1462         .calc_signature = smb2_calc_signature,
1463         .is_read_op = smb2_is_read_op,
1464         .set_oplock_level = smb2_set_oplock_level,
1465         .create_lease_buf = smb2_create_lease_buf,
1466         .parse_lease_buf = smb2_parse_lease_buf,
1467         .clone_range = smb2_clone_range,
1468         .wp_retry_size = smb2_wp_retry_size,
1469         .dir_needs_close = smb2_dir_needs_close,
1470 };
1471
1472 struct smb_version_operations smb21_operations = {
1473         .compare_fids = smb2_compare_fids,
1474         .setup_request = smb2_setup_request,
1475         .setup_async_request = smb2_setup_async_request,
1476         .check_receive = smb2_check_receive,
1477         .add_credits = smb2_add_credits,
1478         .set_credits = smb2_set_credits,
1479         .get_credits_field = smb2_get_credits_field,
1480         .get_credits = smb2_get_credits,
1481         .wait_mtu_credits = smb2_wait_mtu_credits,
1482         .get_next_mid = smb2_get_next_mid,
1483         .read_data_offset = smb2_read_data_offset,
1484         .read_data_length = smb2_read_data_length,
1485         .map_error = map_smb2_to_linux_error,
1486         .find_mid = smb2_find_mid,
1487         .check_message = smb2_check_message,
1488         .dump_detail = smb2_dump_detail,
1489         .clear_stats = smb2_clear_stats,
1490         .print_stats = smb2_print_stats,
1491         .is_oplock_break = smb2_is_valid_oplock_break,
1492         .downgrade_oplock = smb2_downgrade_oplock,
1493         .need_neg = smb2_need_neg,
1494         .negotiate = smb2_negotiate,
1495         .negotiate_wsize = smb2_negotiate_wsize,
1496         .negotiate_rsize = smb2_negotiate_rsize,
1497         .sess_setup = SMB2_sess_setup,
1498         .logoff = SMB2_logoff,
1499         .tree_connect = SMB2_tcon,
1500         .tree_disconnect = SMB2_tdis,
1501         .qfs_tcon = smb2_qfs_tcon,
1502         .is_path_accessible = smb2_is_path_accessible,
1503         .can_echo = smb2_can_echo,
1504         .echo = SMB2_echo,
1505         .query_path_info = smb2_query_path_info,
1506         .get_srv_inum = smb2_get_srv_inum,
1507         .query_file_info = smb2_query_file_info,
1508         .set_path_size = smb2_set_path_size,
1509         .set_file_size = smb2_set_file_size,
1510         .set_file_info = smb2_set_file_info,
1511         .set_compression = smb2_set_compression,
1512         .mkdir = smb2_mkdir,
1513         .mkdir_setinfo = smb2_mkdir_setinfo,
1514         .rmdir = smb2_rmdir,
1515         .unlink = smb2_unlink,
1516         .rename = smb2_rename_path,
1517         .create_hardlink = smb2_create_hardlink,
1518         .query_symlink = smb2_query_symlink,
1519         .query_mf_symlink = smb3_query_mf_symlink,
1520         .create_mf_symlink = smb3_create_mf_symlink,
1521         .open = smb2_open_file,
1522         .set_fid = smb2_set_fid,
1523         .close = smb2_close_file,
1524         .flush = smb2_flush_file,
1525         .async_readv = smb2_async_readv,
1526         .async_writev = smb2_async_writev,
1527         .sync_read = smb2_sync_read,
1528         .sync_write = smb2_sync_write,
1529         .query_dir_first = smb2_query_dir_first,
1530         .query_dir_next = smb2_query_dir_next,
1531         .close_dir = smb2_close_dir,
1532         .calc_smb_size = smb2_calc_size,
1533         .is_status_pending = smb2_is_status_pending,
1534         .oplock_response = smb2_oplock_response,
1535         .queryfs = smb2_queryfs,
1536         .mand_lock = smb2_mand_lock,
1537         .mand_unlock_range = smb2_unlock_range,
1538         .push_mand_locks = smb2_push_mandatory_locks,
1539         .get_lease_key = smb2_get_lease_key,
1540         .set_lease_key = smb2_set_lease_key,
1541         .new_lease_key = smb2_new_lease_key,
1542         .calc_signature = smb2_calc_signature,
1543         .is_read_op = smb21_is_read_op,
1544         .set_oplock_level = smb21_set_oplock_level,
1545         .create_lease_buf = smb2_create_lease_buf,
1546         .parse_lease_buf = smb2_parse_lease_buf,
1547         .clone_range = smb2_clone_range,
1548         .wp_retry_size = smb2_wp_retry_size,
1549         .dir_needs_close = smb2_dir_needs_close,
1550 };
1551
1552 struct smb_version_operations smb30_operations = {
1553         .compare_fids = smb2_compare_fids,
1554         .setup_request = smb2_setup_request,
1555         .setup_async_request = smb2_setup_async_request,
1556         .check_receive = smb2_check_receive,
1557         .add_credits = smb2_add_credits,
1558         .set_credits = smb2_set_credits,
1559         .get_credits_field = smb2_get_credits_field,
1560         .get_credits = smb2_get_credits,
1561         .wait_mtu_credits = smb2_wait_mtu_credits,
1562         .get_next_mid = smb2_get_next_mid,
1563         .read_data_offset = smb2_read_data_offset,
1564         .read_data_length = smb2_read_data_length,
1565         .map_error = map_smb2_to_linux_error,
1566         .find_mid = smb2_find_mid,
1567         .check_message = smb2_check_message,
1568         .dump_detail = smb2_dump_detail,
1569         .clear_stats = smb2_clear_stats,
1570         .print_stats = smb2_print_stats,
1571         .dump_share_caps = smb2_dump_share_caps,
1572         .is_oplock_break = smb2_is_valid_oplock_break,
1573         .downgrade_oplock = smb2_downgrade_oplock,
1574         .need_neg = smb2_need_neg,
1575         .negotiate = smb2_negotiate,
1576         .negotiate_wsize = smb2_negotiate_wsize,
1577         .negotiate_rsize = smb2_negotiate_rsize,
1578         .sess_setup = SMB2_sess_setup,
1579         .logoff = SMB2_logoff,
1580         .tree_connect = SMB2_tcon,
1581         .tree_disconnect = SMB2_tdis,
1582         .qfs_tcon = smb3_qfs_tcon,
1583         .is_path_accessible = smb2_is_path_accessible,
1584         .can_echo = smb2_can_echo,
1585         .echo = SMB2_echo,
1586         .query_path_info = smb2_query_path_info,
1587         .get_srv_inum = smb2_get_srv_inum,
1588         .query_file_info = smb2_query_file_info,
1589         .set_path_size = smb2_set_path_size,
1590         .set_file_size = smb2_set_file_size,
1591         .set_file_info = smb2_set_file_info,
1592         .set_compression = smb2_set_compression,
1593         .mkdir = smb2_mkdir,
1594         .mkdir_setinfo = smb2_mkdir_setinfo,
1595         .rmdir = smb2_rmdir,
1596         .unlink = smb2_unlink,
1597         .rename = smb2_rename_path,
1598         .create_hardlink = smb2_create_hardlink,
1599         .query_symlink = smb2_query_symlink,
1600         .query_mf_symlink = smb3_query_mf_symlink,
1601         .create_mf_symlink = smb3_create_mf_symlink,
1602         .open = smb2_open_file,
1603         .set_fid = smb2_set_fid,
1604         .close = smb2_close_file,
1605         .flush = smb2_flush_file,
1606         .async_readv = smb2_async_readv,
1607         .async_writev = smb2_async_writev,
1608         .sync_read = smb2_sync_read,
1609         .sync_write = smb2_sync_write,
1610         .query_dir_first = smb2_query_dir_first,
1611         .query_dir_next = smb2_query_dir_next,
1612         .close_dir = smb2_close_dir,
1613         .calc_smb_size = smb2_calc_size,
1614         .is_status_pending = smb2_is_status_pending,
1615         .oplock_response = smb2_oplock_response,
1616         .queryfs = smb2_queryfs,
1617         .mand_lock = smb2_mand_lock,
1618         .mand_unlock_range = smb2_unlock_range,
1619         .push_mand_locks = smb2_push_mandatory_locks,
1620         .get_lease_key = smb2_get_lease_key,
1621         .set_lease_key = smb2_set_lease_key,
1622         .new_lease_key = smb2_new_lease_key,
1623         .generate_signingkey = generate_smb3signingkey,
1624         .calc_signature = smb3_calc_signature,
1625         .is_read_op = smb21_is_read_op,
1626         .set_oplock_level = smb3_set_oplock_level,
1627         .create_lease_buf = smb3_create_lease_buf,
1628         .parse_lease_buf = smb3_parse_lease_buf,
1629         .clone_range = smb2_clone_range,
1630         .validate_negotiate = smb3_validate_negotiate,
1631         .wp_retry_size = smb2_wp_retry_size,
1632         .dir_needs_close = smb2_dir_needs_close,
1633         .fallocate = smb3_fallocate,
1634 };
1635
1636 struct smb_version_values smb20_values = {
1637         .version_string = SMB20_VERSION_STRING,
1638         .protocol_id = SMB20_PROT_ID,
1639         .req_capabilities = 0, /* MBZ */
1640         .large_lock_type = 0,
1641         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1642         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1643         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1644         .header_size = sizeof(struct smb2_hdr),
1645         .max_header_size = MAX_SMB2_HDR_SIZE,
1646         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1647         .lock_cmd = SMB2_LOCK,
1648         .cap_unix = 0,
1649         .cap_nt_find = SMB2_NT_FIND,
1650         .cap_large_files = SMB2_LARGE_FILES,
1651         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1652         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1653         .create_lease_size = sizeof(struct create_lease),
1654 };
1655
1656 struct smb_version_values smb21_values = {
1657         .version_string = SMB21_VERSION_STRING,
1658         .protocol_id = SMB21_PROT_ID,
1659         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1660         .large_lock_type = 0,
1661         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1662         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1663         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1664         .header_size = sizeof(struct smb2_hdr),
1665         .max_header_size = MAX_SMB2_HDR_SIZE,
1666         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1667         .lock_cmd = SMB2_LOCK,
1668         .cap_unix = 0,
1669         .cap_nt_find = SMB2_NT_FIND,
1670         .cap_large_files = SMB2_LARGE_FILES,
1671         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1672         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1673         .create_lease_size = sizeof(struct create_lease),
1674 };
1675
1676 struct smb_version_values smb30_values = {
1677         .version_string = SMB30_VERSION_STRING,
1678         .protocol_id = SMB30_PROT_ID,
1679         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1680         .large_lock_type = 0,
1681         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1682         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1683         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1684         .header_size = sizeof(struct smb2_hdr),
1685         .max_header_size = MAX_SMB2_HDR_SIZE,
1686         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1687         .lock_cmd = SMB2_LOCK,
1688         .cap_unix = 0,
1689         .cap_nt_find = SMB2_NT_FIND,
1690         .cap_large_files = SMB2_LARGE_FILES,
1691         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1692         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1693         .create_lease_size = sizeof(struct create_lease_v2),
1694 };
1695
1696 struct smb_version_values smb302_values = {
1697         .version_string = SMB302_VERSION_STRING,
1698         .protocol_id = SMB302_PROT_ID,
1699         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1700         .large_lock_type = 0,
1701         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1702         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1703         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1704         .header_size = sizeof(struct smb2_hdr),
1705         .max_header_size = MAX_SMB2_HDR_SIZE,
1706         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1707         .lock_cmd = SMB2_LOCK,
1708         .cap_unix = 0,
1709         .cap_nt_find = SMB2_NT_FIND,
1710         .cap_large_files = SMB2_LARGE_FILES,
1711         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1712         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1713         .create_lease_size = sizeof(struct create_lease_v2),
1714 };