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_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1106                            loff_t off, loff_t len)
1107 {
1108         /* KEEP_SIZE already checked for by do_fallocate */
1109         if (mode & FALLOC_FL_PUNCH_HOLE)
1110                 return smb3_punch_hole(file, tcon, off, len);
1111         else if (mode & FALLOC_FL_ZERO_RANGE) {
1112                 if (mode & FALLOC_FL_KEEP_SIZE)
1113                         return smb3_zero_range(file, tcon, off, len, true);
1114                 return smb3_zero_range(file, tcon, off, len, false);
1115         }
1116
1117         return -EOPNOTSUPP;
1118 }
1119
1120 static void
1121 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1122                         struct cifsInodeInfo *cinode, bool set_level2)
1123 {
1124         if (set_level2)
1125                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1126                                                 0, NULL);
1127         else
1128                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1129 }
1130
1131 static void
1132 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1133                       unsigned int epoch, bool *purge_cache)
1134 {
1135         oplock &= 0xFF;
1136         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1137                 return;
1138         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1139                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1140                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1141                          &cinode->vfs_inode);
1142         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1143                 cinode->oplock = CIFS_CACHE_RW_FLG;
1144                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1145                          &cinode->vfs_inode);
1146         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1147                 cinode->oplock = CIFS_CACHE_READ_FLG;
1148                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1149                          &cinode->vfs_inode);
1150         } else
1151                 cinode->oplock = 0;
1152 }
1153
1154 static void
1155 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1156                        unsigned int epoch, bool *purge_cache)
1157 {
1158         char message[5] = {0};
1159
1160         oplock &= 0xFF;
1161         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1162                 return;
1163
1164         cinode->oplock = 0;
1165         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1166                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1167                 strcat(message, "R");
1168         }
1169         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1170                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1171                 strcat(message, "H");
1172         }
1173         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1174                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1175                 strcat(message, "W");
1176         }
1177         if (!cinode->oplock)
1178                 strcat(message, "None");
1179         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1180                  &cinode->vfs_inode);
1181 }
1182
1183 static void
1184 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1185                       unsigned int epoch, bool *purge_cache)
1186 {
1187         unsigned int old_oplock = cinode->oplock;
1188
1189         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1190
1191         if (purge_cache) {
1192                 *purge_cache = false;
1193                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1194                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1195                             (epoch - cinode->epoch > 0))
1196                                 *purge_cache = true;
1197                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1198                                  (epoch - cinode->epoch > 1))
1199                                 *purge_cache = true;
1200                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1201                                  (epoch - cinode->epoch > 1))
1202                                 *purge_cache = true;
1203                         else if (cinode->oplock == 0 &&
1204                                  (epoch - cinode->epoch > 0))
1205                                 *purge_cache = true;
1206                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1207                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1208                             (epoch - cinode->epoch > 0))
1209                                 *purge_cache = true;
1210                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1211                                  (epoch - cinode->epoch > 1))
1212                                 *purge_cache = true;
1213                 }
1214                 cinode->epoch = epoch;
1215         }
1216 }
1217
1218 static bool
1219 smb2_is_read_op(__u32 oplock)
1220 {
1221         return oplock == SMB2_OPLOCK_LEVEL_II;
1222 }
1223
1224 static bool
1225 smb21_is_read_op(__u32 oplock)
1226 {
1227         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1228                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1229 }
1230
1231 static __le32
1232 map_oplock_to_lease(u8 oplock)
1233 {
1234         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1235                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1236         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1237                 return SMB2_LEASE_READ_CACHING;
1238         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1239                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1240                        SMB2_LEASE_WRITE_CACHING;
1241         return 0;
1242 }
1243
1244 static char *
1245 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1246 {
1247         struct create_lease *buf;
1248
1249         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1250         if (!buf)
1251                 return NULL;
1252
1253         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1254         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1255         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1256
1257         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1258                                         (struct create_lease, lcontext));
1259         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1260         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1261                                 (struct create_lease, Name));
1262         buf->ccontext.NameLength = cpu_to_le16(4);
1263         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1264         buf->Name[0] = 'R';
1265         buf->Name[1] = 'q';
1266         buf->Name[2] = 'L';
1267         buf->Name[3] = 's';
1268         return (char *)buf;
1269 }
1270
1271 static char *
1272 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1273 {
1274         struct create_lease_v2 *buf;
1275
1276         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1277         if (!buf)
1278                 return NULL;
1279
1280         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1281         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1282         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1283
1284         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1285                                         (struct create_lease_v2, lcontext));
1286         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1287         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1288                                 (struct create_lease_v2, Name));
1289         buf->ccontext.NameLength = cpu_to_le16(4);
1290         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1291         buf->Name[0] = 'R';
1292         buf->Name[1] = 'q';
1293         buf->Name[2] = 'L';
1294         buf->Name[3] = 's';
1295         return (char *)buf;
1296 }
1297
1298 static __u8
1299 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1300 {
1301         struct create_lease *lc = (struct create_lease *)buf;
1302
1303         *epoch = 0; /* not used */
1304         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1305                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1306         return le32_to_cpu(lc->lcontext.LeaseState);
1307 }
1308
1309 static __u8
1310 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1311 {
1312         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1313
1314         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1315         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1316                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1317         return le32_to_cpu(lc->lcontext.LeaseState);
1318 }
1319
1320 static unsigned int
1321 smb2_wp_retry_size(struct inode *inode)
1322 {
1323         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1324                      SMB2_MAX_BUFFER_SIZE);
1325 }
1326
1327 static bool
1328 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1329 {
1330         return !cfile->invalidHandle;
1331 }
1332
1333 struct smb_version_operations smb20_operations = {
1334         .compare_fids = smb2_compare_fids,
1335         .setup_request = smb2_setup_request,
1336         .setup_async_request = smb2_setup_async_request,
1337         .check_receive = smb2_check_receive,
1338         .add_credits = smb2_add_credits,
1339         .set_credits = smb2_set_credits,
1340         .get_credits_field = smb2_get_credits_field,
1341         .get_credits = smb2_get_credits,
1342         .wait_mtu_credits = cifs_wait_mtu_credits,
1343         .get_next_mid = smb2_get_next_mid,
1344         .read_data_offset = smb2_read_data_offset,
1345         .read_data_length = smb2_read_data_length,
1346         .map_error = map_smb2_to_linux_error,
1347         .find_mid = smb2_find_mid,
1348         .check_message = smb2_check_message,
1349         .dump_detail = smb2_dump_detail,
1350         .clear_stats = smb2_clear_stats,
1351         .print_stats = smb2_print_stats,
1352         .is_oplock_break = smb2_is_valid_oplock_break,
1353         .downgrade_oplock = smb2_downgrade_oplock,
1354         .need_neg = smb2_need_neg,
1355         .negotiate = smb2_negotiate,
1356         .negotiate_wsize = smb2_negotiate_wsize,
1357         .negotiate_rsize = smb2_negotiate_rsize,
1358         .sess_setup = SMB2_sess_setup,
1359         .logoff = SMB2_logoff,
1360         .tree_connect = SMB2_tcon,
1361         .tree_disconnect = SMB2_tdis,
1362         .qfs_tcon = smb2_qfs_tcon,
1363         .is_path_accessible = smb2_is_path_accessible,
1364         .can_echo = smb2_can_echo,
1365         .echo = SMB2_echo,
1366         .query_path_info = smb2_query_path_info,
1367         .get_srv_inum = smb2_get_srv_inum,
1368         .query_file_info = smb2_query_file_info,
1369         .set_path_size = smb2_set_path_size,
1370         .set_file_size = smb2_set_file_size,
1371         .set_file_info = smb2_set_file_info,
1372         .set_compression = smb2_set_compression,
1373         .mkdir = smb2_mkdir,
1374         .mkdir_setinfo = smb2_mkdir_setinfo,
1375         .rmdir = smb2_rmdir,
1376         .unlink = smb2_unlink,
1377         .rename = smb2_rename_path,
1378         .create_hardlink = smb2_create_hardlink,
1379         .query_symlink = smb2_query_symlink,
1380         .open = smb2_open_file,
1381         .set_fid = smb2_set_fid,
1382         .close = smb2_close_file,
1383         .flush = smb2_flush_file,
1384         .async_readv = smb2_async_readv,
1385         .async_writev = smb2_async_writev,
1386         .sync_read = smb2_sync_read,
1387         .sync_write = smb2_sync_write,
1388         .query_dir_first = smb2_query_dir_first,
1389         .query_dir_next = smb2_query_dir_next,
1390         .close_dir = smb2_close_dir,
1391         .calc_smb_size = smb2_calc_size,
1392         .is_status_pending = smb2_is_status_pending,
1393         .oplock_response = smb2_oplock_response,
1394         .queryfs = smb2_queryfs,
1395         .mand_lock = smb2_mand_lock,
1396         .mand_unlock_range = smb2_unlock_range,
1397         .push_mand_locks = smb2_push_mandatory_locks,
1398         .get_lease_key = smb2_get_lease_key,
1399         .set_lease_key = smb2_set_lease_key,
1400         .new_lease_key = smb2_new_lease_key,
1401         .calc_signature = smb2_calc_signature,
1402         .is_read_op = smb2_is_read_op,
1403         .set_oplock_level = smb2_set_oplock_level,
1404         .create_lease_buf = smb2_create_lease_buf,
1405         .parse_lease_buf = smb2_parse_lease_buf,
1406         .clone_range = smb2_clone_range,
1407         .wp_retry_size = smb2_wp_retry_size,
1408         .dir_needs_close = smb2_dir_needs_close,
1409 };
1410
1411 struct smb_version_operations smb21_operations = {
1412         .compare_fids = smb2_compare_fids,
1413         .setup_request = smb2_setup_request,
1414         .setup_async_request = smb2_setup_async_request,
1415         .check_receive = smb2_check_receive,
1416         .add_credits = smb2_add_credits,
1417         .set_credits = smb2_set_credits,
1418         .get_credits_field = smb2_get_credits_field,
1419         .get_credits = smb2_get_credits,
1420         .wait_mtu_credits = smb2_wait_mtu_credits,
1421         .get_next_mid = smb2_get_next_mid,
1422         .read_data_offset = smb2_read_data_offset,
1423         .read_data_length = smb2_read_data_length,
1424         .map_error = map_smb2_to_linux_error,
1425         .find_mid = smb2_find_mid,
1426         .check_message = smb2_check_message,
1427         .dump_detail = smb2_dump_detail,
1428         .clear_stats = smb2_clear_stats,
1429         .print_stats = smb2_print_stats,
1430         .is_oplock_break = smb2_is_valid_oplock_break,
1431         .downgrade_oplock = smb2_downgrade_oplock,
1432         .need_neg = smb2_need_neg,
1433         .negotiate = smb2_negotiate,
1434         .negotiate_wsize = smb2_negotiate_wsize,
1435         .negotiate_rsize = smb2_negotiate_rsize,
1436         .sess_setup = SMB2_sess_setup,
1437         .logoff = SMB2_logoff,
1438         .tree_connect = SMB2_tcon,
1439         .tree_disconnect = SMB2_tdis,
1440         .qfs_tcon = smb2_qfs_tcon,
1441         .is_path_accessible = smb2_is_path_accessible,
1442         .can_echo = smb2_can_echo,
1443         .echo = SMB2_echo,
1444         .query_path_info = smb2_query_path_info,
1445         .get_srv_inum = smb2_get_srv_inum,
1446         .query_file_info = smb2_query_file_info,
1447         .set_path_size = smb2_set_path_size,
1448         .set_file_size = smb2_set_file_size,
1449         .set_file_info = smb2_set_file_info,
1450         .set_compression = smb2_set_compression,
1451         .mkdir = smb2_mkdir,
1452         .mkdir_setinfo = smb2_mkdir_setinfo,
1453         .rmdir = smb2_rmdir,
1454         .unlink = smb2_unlink,
1455         .rename = smb2_rename_path,
1456         .create_hardlink = smb2_create_hardlink,
1457         .query_symlink = smb2_query_symlink,
1458         .query_mf_symlink = smb3_query_mf_symlink,
1459         .create_mf_symlink = smb3_create_mf_symlink,
1460         .open = smb2_open_file,
1461         .set_fid = smb2_set_fid,
1462         .close = smb2_close_file,
1463         .flush = smb2_flush_file,
1464         .async_readv = smb2_async_readv,
1465         .async_writev = smb2_async_writev,
1466         .sync_read = smb2_sync_read,
1467         .sync_write = smb2_sync_write,
1468         .query_dir_first = smb2_query_dir_first,
1469         .query_dir_next = smb2_query_dir_next,
1470         .close_dir = smb2_close_dir,
1471         .calc_smb_size = smb2_calc_size,
1472         .is_status_pending = smb2_is_status_pending,
1473         .oplock_response = smb2_oplock_response,
1474         .queryfs = smb2_queryfs,
1475         .mand_lock = smb2_mand_lock,
1476         .mand_unlock_range = smb2_unlock_range,
1477         .push_mand_locks = smb2_push_mandatory_locks,
1478         .get_lease_key = smb2_get_lease_key,
1479         .set_lease_key = smb2_set_lease_key,
1480         .new_lease_key = smb2_new_lease_key,
1481         .calc_signature = smb2_calc_signature,
1482         .is_read_op = smb21_is_read_op,
1483         .set_oplock_level = smb21_set_oplock_level,
1484         .create_lease_buf = smb2_create_lease_buf,
1485         .parse_lease_buf = smb2_parse_lease_buf,
1486         .clone_range = smb2_clone_range,
1487         .wp_retry_size = smb2_wp_retry_size,
1488         .dir_needs_close = smb2_dir_needs_close,
1489 };
1490
1491 struct smb_version_operations smb30_operations = {
1492         .compare_fids = smb2_compare_fids,
1493         .setup_request = smb2_setup_request,
1494         .setup_async_request = smb2_setup_async_request,
1495         .check_receive = smb2_check_receive,
1496         .add_credits = smb2_add_credits,
1497         .set_credits = smb2_set_credits,
1498         .get_credits_field = smb2_get_credits_field,
1499         .get_credits = smb2_get_credits,
1500         .wait_mtu_credits = smb2_wait_mtu_credits,
1501         .get_next_mid = smb2_get_next_mid,
1502         .read_data_offset = smb2_read_data_offset,
1503         .read_data_length = smb2_read_data_length,
1504         .map_error = map_smb2_to_linux_error,
1505         .find_mid = smb2_find_mid,
1506         .check_message = smb2_check_message,
1507         .dump_detail = smb2_dump_detail,
1508         .clear_stats = smb2_clear_stats,
1509         .print_stats = smb2_print_stats,
1510         .dump_share_caps = smb2_dump_share_caps,
1511         .is_oplock_break = smb2_is_valid_oplock_break,
1512         .downgrade_oplock = smb2_downgrade_oplock,
1513         .need_neg = smb2_need_neg,
1514         .negotiate = smb2_negotiate,
1515         .negotiate_wsize = smb2_negotiate_wsize,
1516         .negotiate_rsize = smb2_negotiate_rsize,
1517         .sess_setup = SMB2_sess_setup,
1518         .logoff = SMB2_logoff,
1519         .tree_connect = SMB2_tcon,
1520         .tree_disconnect = SMB2_tdis,
1521         .qfs_tcon = smb3_qfs_tcon,
1522         .is_path_accessible = smb2_is_path_accessible,
1523         .can_echo = smb2_can_echo,
1524         .echo = SMB2_echo,
1525         .query_path_info = smb2_query_path_info,
1526         .get_srv_inum = smb2_get_srv_inum,
1527         .query_file_info = smb2_query_file_info,
1528         .set_path_size = smb2_set_path_size,
1529         .set_file_size = smb2_set_file_size,
1530         .set_file_info = smb2_set_file_info,
1531         .set_compression = smb2_set_compression,
1532         .mkdir = smb2_mkdir,
1533         .mkdir_setinfo = smb2_mkdir_setinfo,
1534         .rmdir = smb2_rmdir,
1535         .unlink = smb2_unlink,
1536         .rename = smb2_rename_path,
1537         .create_hardlink = smb2_create_hardlink,
1538         .query_symlink = smb2_query_symlink,
1539         .query_mf_symlink = smb3_query_mf_symlink,
1540         .create_mf_symlink = smb3_create_mf_symlink,
1541         .open = smb2_open_file,
1542         .set_fid = smb2_set_fid,
1543         .close = smb2_close_file,
1544         .flush = smb2_flush_file,
1545         .async_readv = smb2_async_readv,
1546         .async_writev = smb2_async_writev,
1547         .sync_read = smb2_sync_read,
1548         .sync_write = smb2_sync_write,
1549         .query_dir_first = smb2_query_dir_first,
1550         .query_dir_next = smb2_query_dir_next,
1551         .close_dir = smb2_close_dir,
1552         .calc_smb_size = smb2_calc_size,
1553         .is_status_pending = smb2_is_status_pending,
1554         .oplock_response = smb2_oplock_response,
1555         .queryfs = smb2_queryfs,
1556         .mand_lock = smb2_mand_lock,
1557         .mand_unlock_range = smb2_unlock_range,
1558         .push_mand_locks = smb2_push_mandatory_locks,
1559         .get_lease_key = smb2_get_lease_key,
1560         .set_lease_key = smb2_set_lease_key,
1561         .new_lease_key = smb2_new_lease_key,
1562         .generate_signingkey = generate_smb3signingkey,
1563         .calc_signature = smb3_calc_signature,
1564         .is_read_op = smb21_is_read_op,
1565         .set_oplock_level = smb3_set_oplock_level,
1566         .create_lease_buf = smb3_create_lease_buf,
1567         .parse_lease_buf = smb3_parse_lease_buf,
1568         .clone_range = smb2_clone_range,
1569         .validate_negotiate = smb3_validate_negotiate,
1570         .wp_retry_size = smb2_wp_retry_size,
1571         .dir_needs_close = smb2_dir_needs_close,
1572         .fallocate = smb3_fallocate,
1573 };
1574
1575 struct smb_version_values smb20_values = {
1576         .version_string = SMB20_VERSION_STRING,
1577         .protocol_id = SMB20_PROT_ID,
1578         .req_capabilities = 0, /* MBZ */
1579         .large_lock_type = 0,
1580         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1581         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1582         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1583         .header_size = sizeof(struct smb2_hdr),
1584         .max_header_size = MAX_SMB2_HDR_SIZE,
1585         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1586         .lock_cmd = SMB2_LOCK,
1587         .cap_unix = 0,
1588         .cap_nt_find = SMB2_NT_FIND,
1589         .cap_large_files = SMB2_LARGE_FILES,
1590         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1591         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1592         .create_lease_size = sizeof(struct create_lease),
1593 };
1594
1595 struct smb_version_values smb21_values = {
1596         .version_string = SMB21_VERSION_STRING,
1597         .protocol_id = SMB21_PROT_ID,
1598         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1599         .large_lock_type = 0,
1600         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1601         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1602         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1603         .header_size = sizeof(struct smb2_hdr),
1604         .max_header_size = MAX_SMB2_HDR_SIZE,
1605         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1606         .lock_cmd = SMB2_LOCK,
1607         .cap_unix = 0,
1608         .cap_nt_find = SMB2_NT_FIND,
1609         .cap_large_files = SMB2_LARGE_FILES,
1610         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1611         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1612         .create_lease_size = sizeof(struct create_lease),
1613 };
1614
1615 struct smb_version_values smb30_values = {
1616         .version_string = SMB30_VERSION_STRING,
1617         .protocol_id = SMB30_PROT_ID,
1618         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1619         .large_lock_type = 0,
1620         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1621         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1622         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1623         .header_size = sizeof(struct smb2_hdr),
1624         .max_header_size = MAX_SMB2_HDR_SIZE,
1625         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1626         .lock_cmd = SMB2_LOCK,
1627         .cap_unix = 0,
1628         .cap_nt_find = SMB2_NT_FIND,
1629         .cap_large_files = SMB2_LARGE_FILES,
1630         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1631         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1632         .create_lease_size = sizeof(struct create_lease_v2),
1633 };
1634
1635 struct smb_version_values smb302_values = {
1636         .version_string = SMB302_VERSION_STRING,
1637         .protocol_id = SMB302_PROT_ID,
1638         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1639         .large_lock_type = 0,
1640         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1641         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1642         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1643         .header_size = sizeof(struct smb2_hdr),
1644         .max_header_size = MAX_SMB2_HDR_SIZE,
1645         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1646         .lock_cmd = SMB2_LOCK,
1647         .cap_unix = 0,
1648         .cap_nt_find = SMB2_NT_FIND,
1649         .cap_large_files = SMB2_LARGE_FILES,
1650         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1651         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1652         .create_lease_size = sizeof(struct create_lease_v2),
1653 };