fs/cifs/smb2ops.c

   1 /*
   2  *  SMB2 version specific operations
   3  *
   4  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
   5  *
   6  *  This library is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License v2 as published
   8  *  by the Free Software Foundation.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13  *  the GNU Lesser General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Lesser General Public License
  16  *  along with this library; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 #include <linux/pagemap.h>
  21 #include <linux/vfs.h>
  22 #include <linux/falloc.h>
  23 #include "cifsglob.h"
  24 #include "smb2pdu.h"
  25 #include "smb2proto.h"
  26 #include "cifsproto.h"
  27 #include "cifs_debug.h"
  28 #include "cifs_unicode.h"
  29 #include "smb2status.h"
  30 #include "smb2glob.h"
  31
  32 static int
  33 change_conf(struct TCP_Server_Info *server)
  34 {
  35         server->credits += server->echo_credits + server->oplock_credits;
  36         server->oplock_credits = server->echo_credits = 0;
  37         switch (server->credits) {
  38         case 0:
  39                 return -1;
  40         case 1:
  41                 server->echoes = false;
  42                 server->oplocks = false;
  43                 cifs_dbg(VFS, "disabling echoes and oplocks\n");
  44                 break;
  45         case 2:
  46                 server->echoes = true;
  47                 server->oplocks = false;
  48                 server->echo_credits = 1;
  49                 cifs_dbg(FYI, "disabling oplocks\n");
  50                 break;
  51         default:
  52                 server->echoes = true;
  53                 if (enable_oplocks) {
  54                         server->oplocks = true;
  55                         server->oplock_credits = 1;
  56                 } else
  57                         server->oplocks = false;
  58
  59                 server->echo_credits = 1;
  60         }
  61         server->credits -= server->echo_credits + server->oplock_credits;
  62         return 0;
  63 }
  64
  65 static void
  66 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  67                  const int optype)
  68 {
  69         int *val, rc = 0;
  70         spin_lock(&server->req_lock);
  71         val = server->ops->get_credits_field(server, optype);
  72         *val += add;
  73         server->in_flight--;
  74         if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  75                 rc = change_conf(server);
  76         /*
  77          * Sometimes server returns 0 credits on oplock break ack - we need to
  78          * rebalance credits in this case.
  79          */
  80         else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  81                  server->oplocks) {
  82                 if (server->credits > 1) {
  83                         server->credits--;
  84                         server->oplock_credits++;
  85                 }
  86         }
  87         spin_unlock(&server->req_lock);
  88         wake_up(&server->request_q);
  89         if (rc)
  90                 cifs_reconnect(server);
  91 }
  92
  93 static void
  94 smb2_set_credits(struct TCP_Server_Info *server, const int val)
  95 {
  96         spin_lock(&server->req_lock);
  97         server->credits = val;
  98         spin_unlock(&server->req_lock);
  99 }
 100
 101 static int *
 102 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
 103 {
 104         switch (optype) {
 105         case CIFS_ECHO_OP:
 106                 return &server->echo_credits;
 107         case CIFS_OBREAK_OP:
 108                 return &server->oplock_credits;
 109         default:
 110                 return &server->credits;
 111         }
 112 }
 113
 114 static unsigned int
 115 smb2_get_credits(struct mid_q_entry *mid)
 116 {
 117         return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
 118 }
 119
 120 static int
 121 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 122                       unsigned int *num, unsigned int *credits)
 123 {
 124         int rc = 0;
 125         unsigned int scredits;
 126
 127         spin_lock(&server->req_lock);
 128         while (1) {
 129                 if (server->credits <= 0) {
 130                         spin_unlock(&server->req_lock);
 131                         cifs_num_waiters_inc(server);
 132                         rc = wait_event_killable(server->request_q,
 133                                         has_credits(server, &server->credits));
 134                         cifs_num_waiters_dec(server);
 135                         if (rc)
 136                                 return rc;
 137                         spin_lock(&server->req_lock);
 138                 } else {
 139                         if (server->tcpStatus == CifsExiting) {
 140                                 spin_unlock(&server->req_lock);
 141                                 return -ENOENT;
 142                         }
 143
 144                         scredits = server->credits;
 145                         /* can deadlock with reopen */
 146                         if (scredits == 1) {
 147                                 *num = SMB2_MAX_BUFFER_SIZE;
 148                                 *credits = 0;
 149                                 break;
 150                         }
 151
 152                         /* leave one credit for a possible reopen */
 153                         scredits--;
 154                         *num = min_t(unsigned int, size,
 155                                      scredits * SMB2_MAX_BUFFER_SIZE);
 156
 157                         *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
 158                         server->credits -= *credits;
 159                         server->in_flight++;
 160                         break;
 161                 }
 162         }
 163         spin_unlock(&server->req_lock);
 164         return rc;
 165 }
 166
 167 static __u64
 168 smb2_get_next_mid(struct TCP_Server_Info *server)
 169 {
 170         __u64 mid;
 171         /* for SMB2 we need the current value */
 172         spin_lock(&GlobalMid_Lock);
 173         mid = server->CurrentMid++;
 174         spin_unlock(&GlobalMid_Lock);
 175         return mid;
 176 }
 177
 178 static struct mid_q_entry *
 179 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 180 {
 181         struct mid_q_entry *mid;
 182         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 183         __u64 wire_mid = le64_to_cpu(hdr->MessageId);
 184
 185         spin_lock(&GlobalMid_Lock);
 186         list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 187                 if ((mid->mid == wire_mid) &&
 188                     (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 189                     (mid->command == hdr->Command)) {
 190                         spin_unlock(&GlobalMid_Lock);
 191                         return mid;
 192                 }
 193         }
 194         spin_unlock(&GlobalMid_Lock);
 195         return NULL;
 196 }
 197
 198 static void
 199 smb2_dump_detail(void *buf)
 200 {
 201 #ifdef CONFIG_CIFS_DEBUG2
 202         struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 203
 204         cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 205                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 206                  smb->ProcessId);
 207         cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
 208 #endif
 209 }
 210
 211 static bool
 212 smb2_need_neg(struct TCP_Server_Info *server)
 213 {
 214         return server->max_read == 0;
 215 }
 216
 217 static int
 218 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 219 {
 220         int rc;
 221         ses->server->CurrentMid = 0;
 222         rc = SMB2_negotiate(xid, ses);
 223         /* BB we probably don't need to retry with modern servers */
 224         if (rc == -EAGAIN)
 225                 rc = -EHOSTDOWN;
 226         return rc;
 227 }
 228
 229 static unsigned int
 230 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 231 {
 232         struct TCP_Server_Info *server = tcon->ses->server;
 233         unsigned int wsize;
 234
 235         /* start with specified wsize, or default */
 236         wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 237         wsize = min_t(unsigned int, wsize, server->max_write);
 238
 239         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 240                 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
 241
 242         return wsize;
 243 }
 244
 245 static unsigned int
 246 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 247 {
 248         struct TCP_Server_Info *server = tcon->ses->server;
 249         unsigned int rsize;
 250
 251         /* start with specified rsize, or default */
 252         rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 253         rsize = min_t(unsigned int, rsize, server->max_read);
 254
 255         if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
 256                 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
 257
 258         return rsize;
 259 }
 260
 261 #ifdef CONFIG_CIFS_STATS2
 262 static int
 263 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 264 {
 265         int rc;
 266         unsigned int ret_data_len = 0;
 267         struct network_interface_info_ioctl_rsp *out_buf;
 268
 269         rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 270                         FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 271                         NULL /* no data input */, 0 /* no data input */,
 272                         (char **)&out_buf, &ret_data_len);
 273         if (rc != 0)
 274                 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 275         else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
 276                 cifs_dbg(VFS, "server returned bad net interface info buf\n");
 277                 rc = -EINVAL;
 278         } else {
 279                 /* Dump info on first interface */
 280                 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
 281                         le32_to_cpu(out_buf->Capability));
 282                 cifs_dbg(FYI, "Link Speed %lld\n",
 283                         le64_to_cpu(out_buf->LinkSpeed));
 284         }
 285
 286         return rc;
 287 }
 288 #endif /* STATS2 */
 289
 290 static void
 291 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 292 {
 293         int rc;
 294         __le16 srch_path = 0; /* Null - open root of share */
 295         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 296         struct cifs_open_parms oparms;
 297         struct cifs_fid fid;
 298
 299         oparms.tcon = tcon;
 300         oparms.desired_access = FILE_READ_ATTRIBUTES;
 301         oparms.disposition = FILE_OPEN;
 302         oparms.create_options = 0;
 303         oparms.fid = &fid;
 304         oparms.reconnect = false;
 305
 306         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 307         if (rc)
 308                 return;
 309
 310 #ifdef CONFIG_CIFS_STATS2
 311         SMB3_request_interfaces(xid, tcon);
 312 #endif /* STATS2 */
 313
 314         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 315                         FS_ATTRIBUTE_INFORMATION);
 316         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 317                         FS_DEVICE_INFORMATION);
 318         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 319                         FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
 320         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 321         return;
 322 }
 323
 324 static void
 325 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 326 {
 327         int rc;
 328         __le16 srch_path = 0; /* Null - open root of share */
 329         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 330         struct cifs_open_parms oparms;
 331         struct cifs_fid fid;
 332
 333         oparms.tcon = tcon;
 334         oparms.desired_access = FILE_READ_ATTRIBUTES;
 335         oparms.disposition = FILE_OPEN;
 336         oparms.create_options = 0;
 337         oparms.fid = &fid;
 338         oparms.reconnect = false;
 339
 340         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
 341         if (rc)
 342                 return;
 343
 344         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 345                         FS_ATTRIBUTE_INFORMATION);
 346         SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 347                         FS_DEVICE_INFORMATION);
 348         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 349         return;
 350 }
 351
 352 static int
 353 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 354                         struct cifs_sb_info *cifs_sb, const char *full_path)
 355 {
 356         int rc;
 357         __le16 *utf16_path;
 358         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 359         struct cifs_open_parms oparms;
 360         struct cifs_fid fid;
 361
 362         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 363         if (!utf16_path)
 364                 return -ENOMEM;
 365
 366         oparms.tcon = tcon;
 367         oparms.desired_access = FILE_READ_ATTRIBUTES;
 368         oparms.disposition = FILE_OPEN;
 369         oparms.create_options = 0;
 370         oparms.fid = &fid;
 371         oparms.reconnect = false;
 372
 373         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 374         if (rc) {
 375                 kfree(utf16_path);
 376                 return rc;
 377         }
 378
 379         rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 380         kfree(utf16_path);
 381         return rc;
 382 }
 383
 384 static int
 385 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 386                   struct cifs_sb_info *cifs_sb, const char *full_path,
 387                   u64 *uniqueid, FILE_ALL_INFO *data)
 388 {
 389         *uniqueid = le64_to_cpu(data->IndexNumber);
 390         return 0;
 391 }
 392
 393 static int
 394 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 395                      struct cifs_fid *fid, FILE_ALL_INFO *data)
 396 {
 397         int rc;
 398         struct smb2_file_all_info *smb2_data;
 399
 400         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 401                             GFP_KERNEL);
 402         if (smb2_data == NULL)
 403                 return -ENOMEM;
 404
 405         rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 406                              smb2_data);
 407         if (!rc)
 408                 move_smb2_info_to_cifs(data, smb2_data);
 409         kfree(smb2_data);
 410         return rc;
 411 }
 412
 413 static bool
 414 smb2_can_echo(struct TCP_Server_Info *server)
 415 {
 416         return server->echoes;
 417 }
 418
 419 static void
 420 smb2_clear_stats(struct cifs_tcon *tcon)
 421 {
 422 #ifdef CONFIG_CIFS_STATS
 423         int i;
 424         for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 425                 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 426                 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 427         }
 428 #endif
 429 }
 430
 431 static void
 432 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
 433 {
 434         seq_puts(m, "\n\tShare Capabilities:");
 435         if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
 436                 seq_puts(m, " DFS,");
 437         if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
 438                 seq_puts(m, " CONTINUOUS AVAILABILITY,");
 439         if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
 440                 seq_puts(m, " SCALEOUT,");
 441         if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
 442                 seq_puts(m, " CLUSTER,");
 443         if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
 444                 seq_puts(m, " ASYMMETRIC,");
 445         if (tcon->capabilities == 0)
 446                 seq_puts(m, " None");
 447         if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
 448                 seq_puts(m, " Aligned,");
 449         if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
 450                 seq_puts(m, " Partition Aligned,");
 451         if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
 452                 seq_puts(m, " SSD,");
 453         if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
 454                 seq_puts(m, " TRIM-support,");
 455
 456         seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
 457         if (tcon->perf_sector_size)
 458                 seq_printf(m, "\tOptimal sector size: 0x%x",
 459                            tcon->perf_sector_size);
 460 }
 461
 462 static void
 463 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 464 {
 465 #ifdef CONFIG_CIFS_STATS
 466         atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 467         atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 468         seq_printf(m, "\nNegotiates: %d sent %d failed",
 469                    atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 470                    atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 471         seq_printf(m, "\nSessionSetups: %d sent %d failed",
 472                    atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 473                    atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 474         seq_printf(m, "\nLogoffs: %d sent %d failed",
 475                    atomic_read(&sent[SMB2_LOGOFF_HE]),
 476                    atomic_read(&failed[SMB2_LOGOFF_HE]));
 477         seq_printf(m, "\nTreeConnects: %d sent %d failed",
 478                    atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 479                    atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 480         seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 481                    atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 482                    atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 483         seq_printf(m, "\nCreates: %d sent %d failed",
 484                    atomic_read(&sent[SMB2_CREATE_HE]),
 485                    atomic_read(&failed[SMB2_CREATE_HE]));
 486         seq_printf(m, "\nCloses: %d sent %d failed",
 487                    atomic_read(&sent[SMB2_CLOSE_HE]),
 488                    atomic_read(&failed[SMB2_CLOSE_HE]));
 489         seq_printf(m, "\nFlushes: %d sent %d failed",
 490                    atomic_read(&sent[SMB2_FLUSH_HE]),
 491                    atomic_read(&failed[SMB2_FLUSH_HE]));
 492         seq_printf(m, "\nReads: %d sent %d failed",
 493                    atomic_read(&sent[SMB2_READ_HE]),
 494                    atomic_read(&failed[SMB2_READ_HE]));
 495         seq_printf(m, "\nWrites: %d sent %d failed",
 496                    atomic_read(&sent[SMB2_WRITE_HE]),
 497                    atomic_read(&failed[SMB2_WRITE_HE]));
 498         seq_printf(m, "\nLocks: %d sent %d failed",
 499                    atomic_read(&sent[SMB2_LOCK_HE]),
 500                    atomic_read(&failed[SMB2_LOCK_HE]));
 501         seq_printf(m, "\nIOCTLs: %d sent %d failed",
 502                    atomic_read(&sent[SMB2_IOCTL_HE]),
 503                    atomic_read(&failed[SMB2_IOCTL_HE]));
 504         seq_printf(m, "\nCancels: %d sent %d failed",
 505                    atomic_read(&sent[SMB2_CANCEL_HE]),
 506                    atomic_read(&failed[SMB2_CANCEL_HE]));
 507         seq_printf(m, "\nEchos: %d sent %d failed",
 508                    atomic_read(&sent[SMB2_ECHO_HE]),
 509                    atomic_read(&failed[SMB2_ECHO_HE]));
 510         seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 511                    atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 512                    atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 513         seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 514                    atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 515                    atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 516         seq_printf(m, "\nQueryInfos: %d sent %d failed",
 517                    atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 518                    atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 519         seq_printf(m, "\nSetInfos: %d sent %d failed",
 520                    atomic_read(&sent[SMB2_SET_INFO_HE]),
 521                    atomic_read(&failed[SMB2_SET_INFO_HE]));
 522         seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 523                    atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 524                    atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 525 #endif
 526 }
 527
 528 static void
 529 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 530 {
 531         struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
 532         struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
 533
 534         cfile->fid.persistent_fid = fid->persistent_fid;
 535         cfile->fid.volatile_fid = fid->volatile_fid;
 536         server->ops->set_oplock_level(cinode, oplock, fid->epoch,
 537                                       &fid->purge_cache);
 538         cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
 539         memcpy(cfile->fid.create_guid, fid->create_guid, 16);
 540 }
 541
 542 static void
 543 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 544                 struct cifs_fid *fid)
 545 {
 546         SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 547 }
 548
 549 static int
 550 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 551                      u64 persistent_fid, u64 volatile_fid,
 552                      struct copychunk_ioctl *pcchunk)
 553 {
 554         int rc;
 555         unsigned int ret_data_len;
 556         struct resume_key_req *res_key;
 557
 558         rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 559                         FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
 560                         NULL, 0 /* no input */,
 561                         (char **)&res_key, &ret_data_len);
 562
 563         if (rc) {
 564                 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 565                 goto req_res_key_exit;
 566         }
 567         if (ret_data_len < sizeof(struct resume_key_req)) {
 568                 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
 569                 rc = -EINVAL;
 570                 goto req_res_key_exit;
 571         }
 572         memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
 573
 574 req_res_key_exit:
 575         kfree(res_key);
 576         return rc;
 577 }
 578
 579 static int
 580 smb2_clone_range(const unsigned int xid,
 581                         struct cifsFileInfo *srcfile,
 582                         struct cifsFileInfo *trgtfile, u64 src_off,
 583                         u64 len, u64 dest_off)
 584 {
 585         int rc;
 586         unsigned int ret_data_len;
 587         struct copychunk_ioctl *pcchunk;
 588         struct copychunk_ioctl_rsp *retbuf = NULL;
 589         struct cifs_tcon *tcon;
 590         int chunks_copied = 0;
 591         bool chunk_sizes_updated = false;
 592
 593         pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
 594
 595         if (pcchunk == NULL)
 596                 return -ENOMEM;
 597
 598         cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
 599         /* Request a key from the server to identify the source of the copy */
 600         rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 601                                 srcfile->fid.persistent_fid,
 602                                 srcfile->fid.volatile_fid, pcchunk);
 603
 604         /* Note: request_res_key sets res_key null only if rc !=0 */
 605         if (rc)
 606                 goto cchunk_out;
 607
 608         /* For now array only one chunk long, will make more flexible later */
 609         pcchunk->ChunkCount = cpu_to_le32(1);
 610         pcchunk->Reserved = 0;
 611         pcchunk->Reserved2 = 0;
 612
 613         tcon = tlink_tcon(trgtfile->tlink);
 614
 615         while (len > 0) {
 616                 pcchunk->SourceOffset = cpu_to_le64(src_off);
 617                 pcchunk->TargetOffset = cpu_to_le64(dest_off);
 618                 pcchunk->Length =
 619                         cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
 620
 621                 /* Request server copy to target from src identified by key */
 622                 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 623                         trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 624                         true /* is_fsctl */, (char *)pcchunk,
 625                         sizeof(struct copychunk_ioctl), (char **)&retbuf,
 626                         &ret_data_len);
 627                 if (rc == 0) {
 628                         if (ret_data_len !=
 629                                         sizeof(struct copychunk_ioctl_rsp)) {
 630                                 cifs_dbg(VFS, "invalid cchunk response size\n");
 631                                 rc = -EIO;
 632                                 goto cchunk_out;
 633                         }
 634                         if (retbuf->TotalBytesWritten == 0) {
 635                                 cifs_dbg(FYI, "no bytes copied\n");
 636                                 rc = -EIO;
 637                                 goto cchunk_out;
 638                         }
 639                         /*
 640                          * Check if server claimed to write more than we asked
 641                          */
 642                         if (le32_to_cpu(retbuf->TotalBytesWritten) >
 643                             le32_to_cpu(pcchunk->Length)) {
 644                                 cifs_dbg(VFS, "invalid copy chunk response\n");
 645                                 rc = -EIO;
 646                                 goto cchunk_out;
 647                         }
 648                         if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
 649                                 cifs_dbg(VFS, "invalid num chunks written\n");
 650                                 rc = -EIO;
 651                                 goto cchunk_out;
 652                         }
 653                         chunks_copied++;
 654
 655                         src_off += le32_to_cpu(retbuf->TotalBytesWritten);
 656                         dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
 657                         len -= le32_to_cpu(retbuf->TotalBytesWritten);
 658
 659                         cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
 660                                 le32_to_cpu(retbuf->ChunksWritten),
 661                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 662                                 le32_to_cpu(retbuf->TotalBytesWritten));
 663                 } else if (rc == -EINVAL) {
 664                         if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
 665                                 goto cchunk_out;
 666
 667                         cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
 668                                 le32_to_cpu(retbuf->ChunksWritten),
 669                                 le32_to_cpu(retbuf->ChunkBytesWritten),
 670                                 le32_to_cpu(retbuf->TotalBytesWritten));
 671
 672                         /*
 673                          * Check if this is the first request using these sizes,
 674                          * (ie check if copy succeed once with original sizes
 675                          * and check if the server gave us different sizes after
 676                          * we already updated max sizes on previous request).
 677                          * if not then why is the server returning an error now
 678                          */
 679                         if ((chunks_copied != 0) || chunk_sizes_updated)
 680                                 goto cchunk_out;
 681
 682                         /* Check that server is not asking us to grow size */
 683                         if (le32_to_cpu(retbuf->ChunkBytesWritten) <
 684                                         tcon->max_bytes_chunk)
 685                                 tcon->max_bytes_chunk =
 686                                         le32_to_cpu(retbuf->ChunkBytesWritten);
 687                         else
 688                                 goto cchunk_out; /* server gave us bogus size */
 689
 690                         /* No need to change MaxChunks since already set to 1 */
 691                         chunk_sizes_updated = true;
 692                 } else
 693                         goto cchunk_out;
 694         }
 695
 696 cchunk_out:
 697         kfree(pcchunk);
 698         return rc;
 699 }
 700
 701 static int
 702 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 703                 struct cifs_fid *fid)
 704 {
 705         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 706 }
 707
 708 static unsigned int
 709 smb2_read_data_offset(char *buf)
 710 {
 711         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 712         return rsp->DataOffset;
 713 }
 714
 715 static unsigned int
 716 smb2_read_data_length(char *buf)
 717 {
 718         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 719         return le32_to_cpu(rsp->DataLength);
 720 }
 721
 722
 723 static int
 724 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 725                struct cifs_io_parms *parms, unsigned int *bytes_read,
 726                char **buf, int *buf_type)
 727 {
 728         parms->persistent_fid = pfid->persistent_fid;
 729         parms->volatile_fid = pfid->volatile_fid;
 730         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 731 }
 732
 733 static int
 734 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 735                 struct cifs_io_parms *parms, unsigned int *written,
 736                 struct kvec *iov, unsigned long nr_segs)
 737 {
 738
 739         parms->persistent_fid = pfid->persistent_fid;
 740         parms->volatile_fid = pfid->volatile_fid;
 741         return SMB2_write(xid, parms, written, iov, nr_segs);
 742 }
 743
 744 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 745 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 746                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 747 {
 748         struct cifsInodeInfo *cifsi;
 749         int rc;
 750
 751         cifsi = CIFS_I(inode);
 752
 753         /* if file already sparse don't bother setting sparse again */
 754         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
 755                 return true; /* already sparse */
 756
 757         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
 758                 return true; /* already not sparse */
 759
 760         /*
 761          * Can't check for sparse support on share the usual way via the
 762          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
 763          * since Samba server doesn't set the flag on the share, yet
 764          * supports the set sparse FSCTL and returns sparse correctly
 765          * in the file attributes. If we fail setting sparse though we
 766          * mark that server does not support sparse files for this share
 767          * to avoid repeatedly sending the unsupported fsctl to server
 768          * if the file is repeatedly extended.
 769          */
 770         if (tcon->broken_sparse_sup)
 771                 return false;
 772
 773         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 774                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 775                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
 776         if (rc) {
 777                 tcon->broken_sparse_sup = true;
 778                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
 779                 return false;
 780         }
 781
 782         if (setsparse)
 783                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
 784         else
 785                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
 786
 787         return true;
 788 }
 789
 790 static int
 791 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 792                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 793 {
 794         __le64 eof = cpu_to_le64(size);
 795         struct inode *inode;
 796
 797         /*
 798          * If extending file more than one page make sparse. Many Linux fs
 799          * make files sparse by default when extending via ftruncate
 800          */
 801         inode = d_inode(cfile->dentry);
 802
 803         if (!set_alloc && (size > inode->i_size + 8192)) {
 804                 __u8 set_sparse = 1;
 805
 806                 /* whether set sparse succeeds or not, extend the file */
 807                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
 808         }
 809
 810         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 811                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 812 }
 813
 814 static int
 815 smb2_duplicate_extents(const unsigned int xid,
 816                         struct cifsFileInfo *srcfile,
 817                         struct cifsFileInfo *trgtfile, u64 src_off,
 818                         u64 len, u64 dest_off)
 819 {
 820         int rc;
 821         unsigned int ret_data_len;
 822         char *retbuf = NULL;
 823         struct duplicate_extents_to_file dup_ext_buf;
 824         struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
 825
 826         /* server fileays advertise duplicate extent support with this flag */
 827         if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
 828              FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
 829                 return -EOPNOTSUPP;
 830
 831         dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
 832         dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
 833         dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
 834         dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
 835         dup_ext_buf.ByteCount = cpu_to_le64(len);
 836         cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
 837                 src_off, dest_off, len);
 838
 839         rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
 840         if (rc)
 841                 goto duplicate_extents_out;
 842
 843         rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 844                         trgtfile->fid.volatile_fid,
 845                         FSCTL_DUPLICATE_EXTENTS_TO_FILE,
 846                         true /* is_fsctl */, (char *)&dup_ext_buf,
 847                         sizeof(struct duplicate_extents_to_file),
 848                         (char **)&retbuf,
 849                         &ret_data_len);
 850
 851         if (ret_data_len > 0)
 852                 cifs_dbg(FYI, "non-zero response length in duplicate extents");
 853
 854 duplicate_extents_out:
 855         return rc;
 856 }
 857
 858 static int
 859 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 860                    struct cifsFileInfo *cfile)
 861 {
 862         return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
 863                             cfile->fid.volatile_fid);
 864 }
 865
 866 static int
 867 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
 868                    struct cifsFileInfo *cfile)
 869 {
 870         struct fsctl_set_integrity_information_req integr_info;
 871         char *retbuf = NULL;
 872         unsigned int ret_data_len;
 873
 874         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
 875         integr_info.Flags = 0;
 876         integr_info.Reserved = 0;
 877
 878         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 879                         cfile->fid.volatile_fid,
 880                         FSCTL_SET_INTEGRITY_INFORMATION,
 881                         true /* is_fsctl */, (char *)&integr_info,
 882                         sizeof(struct fsctl_set_integrity_information_req),
 883                         (char **)&retbuf,
 884                         &ret_data_len);
 885
 886 }
 887
 888 static int
 889 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 890                      const char *path, struct cifs_sb_info *cifs_sb,
 891                      struct cifs_fid *fid, __u16 search_flags,
 892                      struct cifs_search_info *srch_inf)
 893 {
 894         __le16 *utf16_path;
 895         int rc;
 896         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 897         struct cifs_open_parms oparms;
 898
 899         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 900         if (!utf16_path)
 901                 return -ENOMEM;
 902
 903         oparms.tcon = tcon;
 904         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 905         oparms.disposition = FILE_OPEN;
 906         oparms.create_options = 0;
 907         oparms.fid = fid;
 908         oparms.reconnect = false;
 909
 910         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 911         kfree(utf16_path);
 912         if (rc) {
 913                 cifs_dbg(VFS, "open dir failed\n");
 914                 return rc;
 915         }
 916
 917         srch_inf->entries_in_buffer = 0;
 918         srch_inf->index_of_last_entry = 0;
 919
 920         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 921                                   fid->volatile_fid, 0, srch_inf);
 922         if (rc) {
 923                 cifs_dbg(VFS, "query directory failed\n");
 924                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 925         }
 926         return rc;
 927 }
 928
 929 static int
 930 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 931                     struct cifs_fid *fid, __u16 search_flags,
 932                     struct cifs_search_info *srch_inf)
 933 {
 934         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 935                                     fid->volatile_fid, 0, srch_inf);
 936 }
 937
 938 static int
 939 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 940                struct cifs_fid *fid)
 941 {
 942         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 943 }
 944
 945 /*
 946 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 947 * the number of credits and return true. Otherwise - return false.
 948 */
 949 static bool
 950 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 951 {
 952         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 953
 954         if (hdr->Status != STATUS_PENDING)
 955                 return false;
 956
 957         if (!length) {
 958                 spin_lock(&server->req_lock);
 959                 server->credits += le16_to_cpu(hdr->CreditRequest);
 960                 spin_unlock(&server->req_lock);
 961                 wake_up(&server->request_q);
 962         }
 963
 964         return true;
 965 }
 966
 967 static int
 968 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 969                      struct cifsInodeInfo *cinode)
 970 {
 971         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 972                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 973                                         smb2_get_lease_state(cinode));
 974
 975         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 976                                  fid->volatile_fid,
 977                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 978 }
 979
 980 static int
 981 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 982              struct kstatfs *buf)
 983 {
 984         int rc;
 985         __le16 srch_path = 0; /* Null - open root of share */
 986         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 987         struct cifs_open_parms oparms;
 988         struct cifs_fid fid;
 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, &srch_path, &oplock, NULL, NULL);
 998         if (rc)
 999                 return rc;
1000         buf->f_type = SMB2_MAGIC_NUMBER;
1001         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1002                            buf);
1003         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1004         return rc;
1005 }
1006
1007 static bool
1008 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1009 {
1010         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1011                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1012 }
1013
1014 static int
1015 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1016                __u64 length, __u32 type, int lock, int unlock, bool wait)
1017 {
1018         if (unlock && !lock)
1019                 type = SMB2_LOCKFLAG_UNLOCK;
1020         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1021                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1022                          current->tgid, length, offset, type, wait);
1023 }
1024
1025 static void
1026 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1027 {
1028         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1029 }
1030
1031 static void
1032 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1033 {
1034         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1035 }
1036
1037 static void
1038 smb2_new_lease_key(struct cifs_fid *fid)
1039 {
1040         get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
1041 }
1042
1043 #define SMB2_SYMLINK_STRUCT_SIZE \
1044         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1045
1046 static int
1047 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1048                    const char *full_path, char **target_path,
1049                    struct cifs_sb_info *cifs_sb)
1050 {
1051         int rc;
1052         __le16 *utf16_path;
1053         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1054         struct cifs_open_parms oparms;
1055         struct cifs_fid fid;
1056         struct smb2_err_rsp *err_buf = NULL;
1057         struct smb2_symlink_err_rsp *symlink;
1058         unsigned int sub_len;
1059         unsigned int sub_offset;
1060         unsigned int print_len;
1061         unsigned int print_offset;
1062
1063         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1064
1065         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1066         if (!utf16_path)
1067                 return -ENOMEM;
1068
1069         oparms.tcon = tcon;
1070         oparms.desired_access = FILE_READ_ATTRIBUTES;
1071         oparms.disposition = FILE_OPEN;
1072         oparms.create_options = 0;
1073         oparms.fid = &fid;
1074         oparms.reconnect = false;
1075
1076         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1077
1078         if (!rc || !err_buf) {
1079                 kfree(utf16_path);
1080                 return -ENOENT;
1081         }
1082
1083         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1084             get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1085                 kfree(utf16_path);
1086                 return -ENOENT;
1087         }
1088
1089         /* open must fail on symlink - reset rc */
1090         rc = 0;
1091         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1092         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1093         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1094         print_len = le16_to_cpu(symlink->PrintNameLength);
1095         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1096
1097         if (get_rfc1002_length(err_buf) + 4 <
1098                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1099                 kfree(utf16_path);
1100                 return -ENOENT;
1101         }
1102
1103         if (get_rfc1002_length(err_buf) + 4 <
1104                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1105                 kfree(utf16_path);
1106                 return -ENOENT;
1107         }
1108
1109         *target_path = cifs_strndup_from_utf16(
1110                                 (char *)symlink->PathBuffer + sub_offset,
1111                                 sub_len, true, cifs_sb->local_nls);
1112         if (!(*target_path)) {
1113                 kfree(utf16_path);
1114                 return -ENOMEM;
1115         }
1116         convert_delimiter(*target_path, '/');
1117         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1118         kfree(utf16_path);
1119         return rc;
1120 }
1121
1122 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1123                             loff_t offset, loff_t len, bool keep_size)
1124 {
1125         struct inode *inode;
1126         struct cifsInodeInfo *cifsi;
1127         struct cifsFileInfo *cfile = file->private_data;
1128         struct file_zero_data_information fsctl_buf;
1129         long rc;
1130         unsigned int xid;
1131
1132         xid = get_xid();
1133
1134         inode = d_inode(cfile->dentry);
1135         cifsi = CIFS_I(inode);
1136
1137         /* if file not oplocked can't be sure whether asking to extend size */
1138         if (!CIFS_CACHE_READ(cifsi))
1139                 if (keep_size == false)
1140                         return -EOPNOTSUPP;
1141
1142         /*
1143          * Must check if file sparse since fallocate -z (zero range) assumes
1144          * non-sparse allocation
1145          */
1146         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1147                 return -EOPNOTSUPP;
1148
1149         /*
1150          * need to make sure we are not asked to extend the file since the SMB3
1151          * fsctl does not change the file size. In the future we could change
1152          * this to zero the first part of the range then set the file size
1153          * which for a non sparse file would zero the newly extended range
1154          */
1155         if (keep_size == false)
1156                 if (i_size_read(inode) < offset + len)
1157                         return -EOPNOTSUPP;
1158
1159         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1160
1161         fsctl_buf.FileOffset = cpu_to_le64(offset);
1162         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1163
1164         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1165                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1166                         true /* is_fctl */, (char *)&fsctl_buf,
1167                         sizeof(struct file_zero_data_information), NULL, NULL);
1168         free_xid(xid);
1169         return rc;
1170 }
1171
1172 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1173                             loff_t offset, loff_t len)
1174 {
1175         struct inode *inode;
1176         struct cifsInodeInfo *cifsi;
1177         struct cifsFileInfo *cfile = file->private_data;
1178         struct file_zero_data_information fsctl_buf;
1179         long rc;
1180         unsigned int xid;
1181         __u8 set_sparse = 1;
1182
1183         xid = get_xid();
1184
1185         inode = d_inode(cfile->dentry);
1186         cifsi = CIFS_I(inode);
1187
1188         /* Need to make file sparse, if not already, before freeing range. */
1189         /* Consider adding equivalent for compressed since it could also work */
1190         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1191                 return -EOPNOTSUPP;
1192
1193         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1194
1195         fsctl_buf.FileOffset = cpu_to_le64(offset);
1196         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1197
1198         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1199                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1200                         true /* is_fctl */, (char *)&fsctl_buf,
1201                         sizeof(struct file_zero_data_information), NULL, NULL);
1202         free_xid(xid);
1203         return rc;
1204 }
1205
1206 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1207                             loff_t off, loff_t len, bool keep_size)
1208 {
1209         struct inode *inode;
1210         struct cifsInodeInfo *cifsi;
1211         struct cifsFileInfo *cfile = file->private_data;
1212         long rc = -EOPNOTSUPP;
1213         unsigned int xid;
1214
1215         xid = get_xid();
1216
1217         inode = d_inode(cfile->dentry);
1218         cifsi = CIFS_I(inode);
1219
1220         /* if file not oplocked can't be sure whether asking to extend size */
1221         if (!CIFS_CACHE_READ(cifsi))
1222                 if (keep_size == false)
1223                         return -EOPNOTSUPP;
1224
1225         /*
1226          * Files are non-sparse by default so falloc may be a no-op
1227          * Must check if file sparse. If not sparse, and not extending
1228          * then no need to do anything since file already allocated
1229          */
1230         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1231                 if (keep_size == true)
1232                         return 0;
1233                 /* check if extending file */
1234                 else if (i_size_read(inode) >= off + len)
1235                         /* not extending file and already not sparse */
1236                         return 0;
1237                 /* BB: in future add else clause to extend file */
1238                 else
1239                         return -EOPNOTSUPP;
1240         }
1241
1242         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1243                 /*
1244                  * Check if falloc starts within first few pages of file
1245                  * and ends within a few pages of the end of file to
1246                  * ensure that most of file is being forced to be
1247                  * fallocated now. If so then setting whole file sparse
1248                  * ie potentially making a few extra pages at the beginning
1249                  * or end of the file non-sparse via set_sparse is harmless.
1250                  */
1251                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1252                         return -EOPNOTSUPP;
1253
1254                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1255         }
1256         /* BB: else ... in future add code to extend file and set sparse */
1257
1258
1259         free_xid(xid);
1260         return rc;
1261 }
1262
1263
1264 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1265                            loff_t off, loff_t len)
1266 {
1267         /* KEEP_SIZE already checked for by do_fallocate */
1268         if (mode & FALLOC_FL_PUNCH_HOLE)
1269                 return smb3_punch_hole(file, tcon, off, len);
1270         else if (mode & FALLOC_FL_ZERO_RANGE) {
1271                 if (mode & FALLOC_FL_KEEP_SIZE)
1272                         return smb3_zero_range(file, tcon, off, len, true);
1273                 return smb3_zero_range(file, tcon, off, len, false);
1274         } else if (mode == FALLOC_FL_KEEP_SIZE)
1275                 return smb3_simple_falloc(file, tcon, off, len, true);
1276         else if (mode == 0)
1277                 return smb3_simple_falloc(file, tcon, off, len, false);
1278
1279         return -EOPNOTSUPP;
1280 }
1281
1282 static void
1283 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1284                         struct cifsInodeInfo *cinode, bool set_level2)
1285 {
1286         if (set_level2)
1287                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1288                                                 0, NULL);
1289         else
1290                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1291 }
1292
1293 static void
1294 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1295                       unsigned int epoch, bool *purge_cache)
1296 {
1297         oplock &= 0xFF;
1298         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1299                 return;
1300         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1301                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1302                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1303                          &cinode->vfs_inode);
1304         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1305                 cinode->oplock = CIFS_CACHE_RW_FLG;
1306                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1307                          &cinode->vfs_inode);
1308         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1309                 cinode->oplock = CIFS_CACHE_READ_FLG;
1310                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1311                          &cinode->vfs_inode);
1312         } else
1313                 cinode->oplock = 0;
1314 }
1315
1316 static void
1317 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1318                        unsigned int epoch, bool *purge_cache)
1319 {
1320         char message[5] = {0};
1321
1322         oplock &= 0xFF;
1323         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1324                 return;
1325
1326         cinode->oplock = 0;
1327         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1328                 cinode->oplock |= CIFS_CACHE_READ_FLG;
1329                 strcat(message, "R");
1330         }
1331         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1332                 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1333                 strcat(message, "H");
1334         }
1335         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1336                 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1337                 strcat(message, "W");
1338         }
1339         if (!cinode->oplock)
1340                 strcat(message, "None");
1341         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1342                  &cinode->vfs_inode);
1343 }
1344
1345 static void
1346 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1347                       unsigned int epoch, bool *purge_cache)
1348 {
1349         unsigned int old_oplock = cinode->oplock;
1350
1351         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1352
1353         if (purge_cache) {
1354                 *purge_cache = false;
1355                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1356                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1357                             (epoch - cinode->epoch > 0))
1358                                 *purge_cache = true;
1359                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1360                                  (epoch - cinode->epoch > 1))
1361                                 *purge_cache = true;
1362                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1363                                  (epoch - cinode->epoch > 1))
1364                                 *purge_cache = true;
1365                         else if (cinode->oplock == 0 &&
1366                                  (epoch - cinode->epoch > 0))
1367                                 *purge_cache = true;
1368                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1369                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1370                             (epoch - cinode->epoch > 0))
1371                                 *purge_cache = true;
1372                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1373                                  (epoch - cinode->epoch > 1))
1374                                 *purge_cache = true;
1375                 }
1376                 cinode->epoch = epoch;
1377         }
1378 }
1379
1380 static bool
1381 smb2_is_read_op(__u32 oplock)
1382 {
1383         return oplock == SMB2_OPLOCK_LEVEL_II;
1384 }
1385
1386 static bool
1387 smb21_is_read_op(__u32 oplock)
1388 {
1389         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1390                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1391 }
1392
1393 static __le32
1394 map_oplock_to_lease(u8 oplock)
1395 {
1396         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1397                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1398         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1399                 return SMB2_LEASE_READ_CACHING;
1400         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1401                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1402                        SMB2_LEASE_WRITE_CACHING;
1403         return 0;
1404 }
1405
1406 static char *
1407 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1408 {
1409         struct create_lease *buf;
1410
1411         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1412         if (!buf)
1413                 return NULL;
1414
1415         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1416         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1417         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1418
1419         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1420                                         (struct create_lease, lcontext));
1421         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1422         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1423                                 (struct create_lease, Name));
1424         buf->ccontext.NameLength = cpu_to_le16(4);
1425         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1426         buf->Name[0] = 'R';
1427         buf->Name[1] = 'q';
1428         buf->Name[2] = 'L';
1429         buf->Name[3] = 's';
1430         return (char *)buf;
1431 }
1432
1433 static char *
1434 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1435 {
1436         struct create_lease_v2 *buf;
1437
1438         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1439         if (!buf)
1440                 return NULL;
1441
1442         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1443         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1444         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1445
1446         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1447                                         (struct create_lease_v2, lcontext));
1448         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1449         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1450                                 (struct create_lease_v2, Name));
1451         buf->ccontext.NameLength = cpu_to_le16(4);
1452         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1453         buf->Name[0] = 'R';
1454         buf->Name[1] = 'q';
1455         buf->Name[2] = 'L';
1456         buf->Name[3] = 's';
1457         return (char *)buf;
1458 }
1459
1460 static __u8
1461 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1462 {
1463         struct create_lease *lc = (struct create_lease *)buf;
1464
1465         *epoch = 0; /* not used */
1466         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1467                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1468         return le32_to_cpu(lc->lcontext.LeaseState);
1469 }
1470
1471 static __u8
1472 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1473 {
1474         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1475
1476         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1477         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1478                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1479         return le32_to_cpu(lc->lcontext.LeaseState);
1480 }
1481
1482 static unsigned int
1483 smb2_wp_retry_size(struct inode *inode)
1484 {
1485         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1486                      SMB2_MAX_BUFFER_SIZE);
1487 }
1488
1489 static bool
1490 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1491 {
1492         return !cfile->invalidHandle;
1493 }
1494
1495 struct smb_version_operations smb20_operations = {
1496         .compare_fids = smb2_compare_fids,
1497         .setup_request = smb2_setup_request,
1498         .setup_async_request = smb2_setup_async_request,
1499         .check_receive = smb2_check_receive,
1500         .add_credits = smb2_add_credits,
1501         .set_credits = smb2_set_credits,
1502         .get_credits_field = smb2_get_credits_field,
1503         .get_credits = smb2_get_credits,
1504         .wait_mtu_credits = cifs_wait_mtu_credits,
1505         .get_next_mid = smb2_get_next_mid,
1506         .read_data_offset = smb2_read_data_offset,
1507         .read_data_length = smb2_read_data_length,
1508         .map_error = map_smb2_to_linux_error,
1509         .find_mid = smb2_find_mid,
1510         .check_message = smb2_check_message,
1511         .dump_detail = smb2_dump_detail,
1512         .clear_stats = smb2_clear_stats,
1513         .print_stats = smb2_print_stats,
1514         .is_oplock_break = smb2_is_valid_oplock_break,
1515         .downgrade_oplock = smb2_downgrade_oplock,
1516         .need_neg = smb2_need_neg,
1517         .negotiate = smb2_negotiate,
1518         .negotiate_wsize = smb2_negotiate_wsize,
1519         .negotiate_rsize = smb2_negotiate_rsize,
1520         .sess_setup = SMB2_sess_setup,
1521         .logoff = SMB2_logoff,
1522         .tree_connect = SMB2_tcon,
1523         .tree_disconnect = SMB2_tdis,
1524         .qfs_tcon = smb2_qfs_tcon,
1525         .is_path_accessible = smb2_is_path_accessible,
1526         .can_echo = smb2_can_echo,
1527         .echo = SMB2_echo,
1528         .query_path_info = smb2_query_path_info,
1529         .get_srv_inum = smb2_get_srv_inum,
1530         .query_file_info = smb2_query_file_info,
1531         .set_path_size = smb2_set_path_size,
1532         .set_file_size = smb2_set_file_size,
1533         .set_file_info = smb2_set_file_info,
1534         .set_compression = smb2_set_compression,
1535         .mkdir = smb2_mkdir,
1536         .mkdir_setinfo = smb2_mkdir_setinfo,
1537         .rmdir = smb2_rmdir,
1538         .unlink = smb2_unlink,
1539         .rename = smb2_rename_path,
1540         .create_hardlink = smb2_create_hardlink,
1541         .query_symlink = smb2_query_symlink,
1542         .open = smb2_open_file,
1543         .set_fid = smb2_set_fid,
1544         .close = smb2_close_file,
1545         .flush = smb2_flush_file,
1546         .async_readv = smb2_async_readv,
1547         .async_writev = smb2_async_writev,
1548         .sync_read = smb2_sync_read,
1549         .sync_write = smb2_sync_write,
1550         .query_dir_first = smb2_query_dir_first,
1551         .query_dir_next = smb2_query_dir_next,
1552         .close_dir = smb2_close_dir,
1553         .calc_smb_size = smb2_calc_size,
1554         .is_status_pending = smb2_is_status_pending,
1555         .oplock_response = smb2_oplock_response,
1556         .queryfs = smb2_queryfs,
1557         .mand_lock = smb2_mand_lock,
1558         .mand_unlock_range = smb2_unlock_range,
1559         .push_mand_locks = smb2_push_mandatory_locks,
1560         .get_lease_key = smb2_get_lease_key,
1561         .set_lease_key = smb2_set_lease_key,
1562         .new_lease_key = smb2_new_lease_key,
1563         .calc_signature = smb2_calc_signature,
1564         .is_read_op = smb2_is_read_op,
1565         .set_oplock_level = smb2_set_oplock_level,
1566         .create_lease_buf = smb2_create_lease_buf,
1567         .parse_lease_buf = smb2_parse_lease_buf,
1568         .clone_range = smb2_clone_range,
1569         .wp_retry_size = smb2_wp_retry_size,
1570         .dir_needs_close = smb2_dir_needs_close,
1571 };
1572
1573 struct smb_version_operations smb21_operations = {
1574         .compare_fids = smb2_compare_fids,
1575         .setup_request = smb2_setup_request,
1576         .setup_async_request = smb2_setup_async_request,
1577         .check_receive = smb2_check_receive,
1578         .add_credits = smb2_add_credits,
1579         .set_credits = smb2_set_credits,
1580         .get_credits_field = smb2_get_credits_field,
1581         .get_credits = smb2_get_credits,
1582         .wait_mtu_credits = smb2_wait_mtu_credits,
1583         .get_next_mid = smb2_get_next_mid,
1584         .read_data_offset = smb2_read_data_offset,
1585         .read_data_length = smb2_read_data_length,
1586         .map_error = map_smb2_to_linux_error,
1587         .find_mid = smb2_find_mid,
1588         .check_message = smb2_check_message,
1589         .dump_detail = smb2_dump_detail,
1590         .clear_stats = smb2_clear_stats,
1591         .print_stats = smb2_print_stats,
1592         .is_oplock_break = smb2_is_valid_oplock_break,
1593         .downgrade_oplock = smb2_downgrade_oplock,
1594         .need_neg = smb2_need_neg,
1595         .negotiate = smb2_negotiate,
1596         .negotiate_wsize = smb2_negotiate_wsize,
1597         .negotiate_rsize = smb2_negotiate_rsize,
1598         .sess_setup = SMB2_sess_setup,
1599         .logoff = SMB2_logoff,
1600         .tree_connect = SMB2_tcon,
1601         .tree_disconnect = SMB2_tdis,
1602         .qfs_tcon = smb2_qfs_tcon,
1603         .is_path_accessible = smb2_is_path_accessible,
1604         .can_echo = smb2_can_echo,
1605         .echo = SMB2_echo,
1606         .query_path_info = smb2_query_path_info,
1607         .get_srv_inum = smb2_get_srv_inum,
1608         .query_file_info = smb2_query_file_info,
1609         .set_path_size = smb2_set_path_size,
1610         .set_file_size = smb2_set_file_size,
1611         .set_file_info = smb2_set_file_info,
1612         .set_compression = smb2_set_compression,
1613         .mkdir = smb2_mkdir,
1614         .mkdir_setinfo = smb2_mkdir_setinfo,
1615         .rmdir = smb2_rmdir,
1616         .unlink = smb2_unlink,
1617         .rename = smb2_rename_path,
1618         .create_hardlink = smb2_create_hardlink,
1619         .query_symlink = smb2_query_symlink,
1620         .query_mf_symlink = smb3_query_mf_symlink,
1621         .create_mf_symlink = smb3_create_mf_symlink,
1622         .open = smb2_open_file,
1623         .set_fid = smb2_set_fid,
1624         .close = smb2_close_file,
1625         .flush = smb2_flush_file,
1626         .async_readv = smb2_async_readv,
1627         .async_writev = smb2_async_writev,
1628         .sync_read = smb2_sync_read,
1629         .sync_write = smb2_sync_write,
1630         .query_dir_first = smb2_query_dir_first,
1631         .query_dir_next = smb2_query_dir_next,
1632         .close_dir = smb2_close_dir,
1633         .calc_smb_size = smb2_calc_size,
1634         .is_status_pending = smb2_is_status_pending,
1635         .oplock_response = smb2_oplock_response,
1636         .queryfs = smb2_queryfs,
1637         .mand_lock = smb2_mand_lock,
1638         .mand_unlock_range = smb2_unlock_range,
1639         .push_mand_locks = smb2_push_mandatory_locks,
1640         .get_lease_key = smb2_get_lease_key,
1641         .set_lease_key = smb2_set_lease_key,
1642         .new_lease_key = smb2_new_lease_key,
1643         .calc_signature = smb2_calc_signature,
1644         .is_read_op = smb21_is_read_op,
1645         .set_oplock_level = smb21_set_oplock_level,
1646         .create_lease_buf = smb2_create_lease_buf,
1647         .parse_lease_buf = smb2_parse_lease_buf,
1648         .clone_range = smb2_clone_range,
1649         .wp_retry_size = smb2_wp_retry_size,
1650         .dir_needs_close = smb2_dir_needs_close,
1651 };
1652
1653 struct smb_version_operations smb30_operations = {
1654         .compare_fids = smb2_compare_fids,
1655         .setup_request = smb2_setup_request,
1656         .setup_async_request = smb2_setup_async_request,
1657         .check_receive = smb2_check_receive,
1658         .add_credits = smb2_add_credits,
1659         .set_credits = smb2_set_credits,
1660         .get_credits_field = smb2_get_credits_field,
1661         .get_credits = smb2_get_credits,
1662         .wait_mtu_credits = smb2_wait_mtu_credits,
1663         .get_next_mid = smb2_get_next_mid,
1664         .read_data_offset = smb2_read_data_offset,
1665         .read_data_length = smb2_read_data_length,
1666         .map_error = map_smb2_to_linux_error,
1667         .find_mid = smb2_find_mid,
1668         .check_message = smb2_check_message,
1669         .dump_detail = smb2_dump_detail,
1670         .clear_stats = smb2_clear_stats,
1671         .print_stats = smb2_print_stats,
1672         .dump_share_caps = smb2_dump_share_caps,
1673         .is_oplock_break = smb2_is_valid_oplock_break,
1674         .downgrade_oplock = smb2_downgrade_oplock,
1675         .need_neg = smb2_need_neg,
1676         .negotiate = smb2_negotiate,
1677         .negotiate_wsize = smb2_negotiate_wsize,
1678         .negotiate_rsize = smb2_negotiate_rsize,
1679         .sess_setup = SMB2_sess_setup,
1680         .logoff = SMB2_logoff,
1681         .tree_connect = SMB2_tcon,
1682         .tree_disconnect = SMB2_tdis,
1683         .qfs_tcon = smb3_qfs_tcon,
1684         .is_path_accessible = smb2_is_path_accessible,
1685         .can_echo = smb2_can_echo,
1686         .echo = SMB2_echo,
1687         .query_path_info = smb2_query_path_info,
1688         .get_srv_inum = smb2_get_srv_inum,
1689         .query_file_info = smb2_query_file_info,
1690         .set_path_size = smb2_set_path_size,
1691         .set_file_size = smb2_set_file_size,
1692         .set_file_info = smb2_set_file_info,
1693         .set_compression = smb2_set_compression,
1694         .mkdir = smb2_mkdir,
1695         .mkdir_setinfo = smb2_mkdir_setinfo,
1696         .rmdir = smb2_rmdir,
1697         .unlink = smb2_unlink,
1698         .rename = smb2_rename_path,
1699         .create_hardlink = smb2_create_hardlink,
1700         .query_symlink = smb2_query_symlink,
1701         .query_mf_symlink = smb3_query_mf_symlink,
1702         .create_mf_symlink = smb3_create_mf_symlink,
1703         .open = smb2_open_file,
1704         .set_fid = smb2_set_fid,
1705         .close = smb2_close_file,
1706         .flush = smb2_flush_file,
1707         .async_readv = smb2_async_readv,
1708         .async_writev = smb2_async_writev,
1709         .sync_read = smb2_sync_read,
1710         .sync_write = smb2_sync_write,
1711         .query_dir_first = smb2_query_dir_first,
1712         .query_dir_next = smb2_query_dir_next,
1713         .close_dir = smb2_close_dir,
1714         .calc_smb_size = smb2_calc_size,
1715         .is_status_pending = smb2_is_status_pending,
1716         .oplock_response = smb2_oplock_response,
1717         .queryfs = smb2_queryfs,
1718         .mand_lock = smb2_mand_lock,
1719         .mand_unlock_range = smb2_unlock_range,
1720         .push_mand_locks = smb2_push_mandatory_locks,
1721         .get_lease_key = smb2_get_lease_key,
1722         .set_lease_key = smb2_set_lease_key,
1723         .new_lease_key = smb2_new_lease_key,
1724         .generate_signingkey = generate_smb3signingkey,
1725         .calc_signature = smb3_calc_signature,
1726         .set_integrity  = smb3_set_integrity,
1727         .is_read_op = smb21_is_read_op,
1728         .set_oplock_level = smb3_set_oplock_level,
1729         .create_lease_buf = smb3_create_lease_buf,
1730         .parse_lease_buf = smb3_parse_lease_buf,
1731         .clone_range = smb2_clone_range,
1732         .duplicate_extents = smb2_duplicate_extents,
1733         .validate_negotiate = smb3_validate_negotiate,
1734         .wp_retry_size = smb2_wp_retry_size,
1735         .dir_needs_close = smb2_dir_needs_close,
1736         .fallocate = smb3_fallocate,
1737 };
1738
1739 #ifdef CONFIG_CIFS_SMB311
1740 struct smb_version_operations smb311_operations = {
1741         .compare_fids = smb2_compare_fids,
1742         .setup_request = smb2_setup_request,
1743         .setup_async_request = smb2_setup_async_request,
1744         .check_receive = smb2_check_receive,
1745         .add_credits = smb2_add_credits,
1746         .set_credits = smb2_set_credits,
1747         .get_credits_field = smb2_get_credits_field,
1748         .get_credits = smb2_get_credits,
1749         .wait_mtu_credits = smb2_wait_mtu_credits,
1750         .get_next_mid = smb2_get_next_mid,
1751         .read_data_offset = smb2_read_data_offset,
1752         .read_data_length = smb2_read_data_length,
1753         .map_error = map_smb2_to_linux_error,
1754         .find_mid = smb2_find_mid,
1755         .check_message = smb2_check_message,
1756         .dump_detail = smb2_dump_detail,
1757         .clear_stats = smb2_clear_stats,
1758         .print_stats = smb2_print_stats,
1759         .dump_share_caps = smb2_dump_share_caps,
1760         .is_oplock_break = smb2_is_valid_oplock_break,
1761         .downgrade_oplock = smb2_downgrade_oplock,
1762         .need_neg = smb2_need_neg,
1763         .negotiate = smb2_negotiate,
1764         .negotiate_wsize = smb2_negotiate_wsize,
1765         .negotiate_rsize = smb2_negotiate_rsize,
1766         .sess_setup = SMB2_sess_setup,
1767         .logoff = SMB2_logoff,
1768         .tree_connect = SMB2_tcon,
1769         .tree_disconnect = SMB2_tdis,
1770         .qfs_tcon = smb3_qfs_tcon,
1771         .is_path_accessible = smb2_is_path_accessible,
1772         .can_echo = smb2_can_echo,
1773         .echo = SMB2_echo,
1774         .query_path_info = smb2_query_path_info,
1775         .get_srv_inum = smb2_get_srv_inum,
1776         .query_file_info = smb2_query_file_info,
1777         .set_path_size = smb2_set_path_size,
1778         .set_file_size = smb2_set_file_size,
1779         .set_file_info = smb2_set_file_info,
1780         .set_compression = smb2_set_compression,
1781         .mkdir = smb2_mkdir,
1782         .mkdir_setinfo = smb2_mkdir_setinfo,
1783         .rmdir = smb2_rmdir,
1784         .unlink = smb2_unlink,
1785         .rename = smb2_rename_path,
1786         .create_hardlink = smb2_create_hardlink,
1787         .query_symlink = smb2_query_symlink,
1788         .query_mf_symlink = smb3_query_mf_symlink,
1789         .create_mf_symlink = smb3_create_mf_symlink,
1790         .open = smb2_open_file,
1791         .set_fid = smb2_set_fid,
1792         .close = smb2_close_file,
1793         .flush = smb2_flush_file,
1794         .async_readv = smb2_async_readv,
1795         .async_writev = smb2_async_writev,
1796         .sync_read = smb2_sync_read,
1797         .sync_write = smb2_sync_write,
1798         .query_dir_first = smb2_query_dir_first,
1799         .query_dir_next = smb2_query_dir_next,
1800         .close_dir = smb2_close_dir,
1801         .calc_smb_size = smb2_calc_size,
1802         .is_status_pending = smb2_is_status_pending,
1803         .oplock_response = smb2_oplock_response,
1804         .queryfs = smb2_queryfs,
1805         .mand_lock = smb2_mand_lock,
1806         .mand_unlock_range = smb2_unlock_range,
1807         .push_mand_locks = smb2_push_mandatory_locks,
1808         .get_lease_key = smb2_get_lease_key,
1809         .set_lease_key = smb2_set_lease_key,
1810         .new_lease_key = smb2_new_lease_key,
1811         .generate_signingkey = generate_smb3signingkey,
1812         .calc_signature = smb3_calc_signature,
1813         .set_integrity  = smb3_set_integrity,
1814         .is_read_op = smb21_is_read_op,
1815         .set_oplock_level = smb3_set_oplock_level,
1816         .create_lease_buf = smb3_create_lease_buf,
1817         .parse_lease_buf = smb3_parse_lease_buf,
1818         .clone_range = smb2_clone_range,
1819         .duplicate_extents = smb2_duplicate_extents,
1820 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1821         .wp_retry_size = smb2_wp_retry_size,
1822         .dir_needs_close = smb2_dir_needs_close,
1823         .fallocate = smb3_fallocate,
1824 };
1825 #endif /* CIFS_SMB311 */
1826
1827 struct smb_version_values smb20_values = {
1828         .version_string = SMB20_VERSION_STRING,
1829         .protocol_id = SMB20_PROT_ID,
1830         .req_capabilities = 0, /* MBZ */
1831         .large_lock_type = 0,
1832         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1833         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1834         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1835         .header_size = sizeof(struct smb2_hdr),
1836         .max_header_size = MAX_SMB2_HDR_SIZE,
1837         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1838         .lock_cmd = SMB2_LOCK,
1839         .cap_unix = 0,
1840         .cap_nt_find = SMB2_NT_FIND,
1841         .cap_large_files = SMB2_LARGE_FILES,
1842         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1843         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1844         .create_lease_size = sizeof(struct create_lease),
1845 };
1846
1847 struct smb_version_values smb21_values = {
1848         .version_string = SMB21_VERSION_STRING,
1849         .protocol_id = SMB21_PROT_ID,
1850         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1851         .large_lock_type = 0,
1852         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1853         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1854         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1855         .header_size = sizeof(struct smb2_hdr),
1856         .max_header_size = MAX_SMB2_HDR_SIZE,
1857         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1858         .lock_cmd = SMB2_LOCK,
1859         .cap_unix = 0,
1860         .cap_nt_find = SMB2_NT_FIND,
1861         .cap_large_files = SMB2_LARGE_FILES,
1862         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1863         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1864         .create_lease_size = sizeof(struct create_lease),
1865 };
1866
1867 struct smb_version_values smb30_values = {
1868         .version_string = SMB30_VERSION_STRING,
1869         .protocol_id = SMB30_PROT_ID,
1870         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1871         .large_lock_type = 0,
1872         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1873         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1874         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1875         .header_size = sizeof(struct smb2_hdr),
1876         .max_header_size = MAX_SMB2_HDR_SIZE,
1877         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1878         .lock_cmd = SMB2_LOCK,
1879         .cap_unix = 0,
1880         .cap_nt_find = SMB2_NT_FIND,
1881         .cap_large_files = SMB2_LARGE_FILES,
1882         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1883         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1884         .create_lease_size = sizeof(struct create_lease_v2),
1885 };
1886
1887 struct smb_version_values smb302_values = {
1888         .version_string = SMB302_VERSION_STRING,
1889         .protocol_id = SMB302_PROT_ID,
1890         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1891         .large_lock_type = 0,
1892         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1893         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1894         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1895         .header_size = sizeof(struct smb2_hdr),
1896         .max_header_size = MAX_SMB2_HDR_SIZE,
1897         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1898         .lock_cmd = SMB2_LOCK,
1899         .cap_unix = 0,
1900         .cap_nt_find = SMB2_NT_FIND,
1901         .cap_large_files = SMB2_LARGE_FILES,
1902         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1903         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1904         .create_lease_size = sizeof(struct create_lease_v2),
1905 };
1906
1907 #ifdef CONFIG_CIFS_SMB311
1908 struct smb_version_values smb311_values = {
1909         .version_string = SMB311_VERSION_STRING,
1910         .protocol_id = SMB311_PROT_ID,
1911         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1912         .large_lock_type = 0,
1913         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1914         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1915         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1916         .header_size = sizeof(struct smb2_hdr),
1917         .max_header_size = MAX_SMB2_HDR_SIZE,
1918         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1919         .lock_cmd = SMB2_LOCK,
1920         .cap_unix = 0,
1921         .cap_nt_find = SMB2_NT_FIND,
1922         .cap_large_files = SMB2_LARGE_FILES,
1923         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1924         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1925         .create_lease_size = sizeof(struct create_lease_v2),
1926 };
1927 #endif /* SMB311 */