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 <= 8) {
 147                                 *num = SMB2_MAX_BUFFER_SIZE;
 148                                 *credits = 0;
 149                                 break;
 150                         }
 151
 152                         /* leave some credits for reopen and other ops */
 153                         scredits -= 8;
 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         kfree(out_buf);
 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         kfree(retbuf);
 699         return rc;
 700 }
 701
 702 static int
 703 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 704                 struct cifs_fid *fid)
 705 {
 706         return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 707 }
 708
 709 static unsigned int
 710 smb2_read_data_offset(char *buf)
 711 {
 712         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 713         return rsp->DataOffset;
 714 }
 715
 716 static unsigned int
 717 smb2_read_data_length(char *buf)
 718 {
 719         struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 720         return le32_to_cpu(rsp->DataLength);
 721 }
 722
 723
 724 static int
 725 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
 726                struct cifs_io_parms *parms, unsigned int *bytes_read,
 727                char **buf, int *buf_type)
 728 {
 729         parms->persistent_fid = pfid->persistent_fid;
 730         parms->volatile_fid = pfid->volatile_fid;
 731         return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 732 }
 733
 734 static int
 735 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
 736                 struct cifs_io_parms *parms, unsigned int *written,
 737                 struct kvec *iov, unsigned long nr_segs)
 738 {
 739
 740         parms->persistent_fid = pfid->persistent_fid;
 741         parms->volatile_fid = pfid->volatile_fid;
 742         return SMB2_write(xid, parms, written, iov, nr_segs);
 743 }
 744
 745 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
 746 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 747                 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
 748 {
 749         struct cifsInodeInfo *cifsi;
 750         int rc;
 751
 752         cifsi = CIFS_I(inode);
 753
 754         /* if file already sparse don't bother setting sparse again */
 755         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
 756                 return true; /* already sparse */
 757
 758         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
 759                 return true; /* already not sparse */
 760
 761         /*
 762          * Can't check for sparse support on share the usual way via the
 763          * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
 764          * since Samba server doesn't set the flag on the share, yet
 765          * supports the set sparse FSCTL and returns sparse correctly
 766          * in the file attributes. If we fail setting sparse though we
 767          * mark that server does not support sparse files for this share
 768          * to avoid repeatedly sending the unsupported fsctl to server
 769          * if the file is repeatedly extended.
 770          */
 771         if (tcon->broken_sparse_sup)
 772                 return false;
 773
 774         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 775                         cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 776                         true /* is_fctl */, &setsparse, 1, NULL, NULL);
 777         if (rc) {
 778                 tcon->broken_sparse_sup = true;
 779                 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
 780                 return false;
 781         }
 782
 783         if (setsparse)
 784                 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
 785         else
 786                 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
 787
 788         return true;
 789 }
 790
 791 static int
 792 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 793                    struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 794 {
 795         __le64 eof = cpu_to_le64(size);
 796         struct inode *inode;
 797
 798         /*
 799          * If extending file more than one page make sparse. Many Linux fs
 800          * make files sparse by default when extending via ftruncate
 801          */
 802         inode = d_inode(cfile->dentry);
 803
 804         if (!set_alloc && (size > inode->i_size + 8192)) {
 805                 __u8 set_sparse = 1;
 806
 807                 /* whether set sparse succeeds or not, extend the file */
 808                 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
 809         }
 810
 811         return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 812                             cfile->fid.volatile_fid, cfile->pid, &eof, false);
 813 }
 814
 815 static int
 816 smb2_duplicate_extents(const unsigned int xid,
 817                         struct cifsFileInfo *srcfile,
 818                         struct cifsFileInfo *trgtfile, u64 src_off,
 819                         u64 len, u64 dest_off)
 820 {
 821         int rc;
 822         unsigned int ret_data_len;
 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                         NULL,
 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         unsigned int ret_data_len;
 872
 873         integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
 874         integr_info.Flags = 0;
 875         integr_info.Reserved = 0;
 876
 877         return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 878                         cfile->fid.volatile_fid,
 879                         FSCTL_SET_INTEGRITY_INFORMATION,
 880                         true /* is_fsctl */, (char *)&integr_info,
 881                         sizeof(struct fsctl_set_integrity_information_req),
 882                         NULL,
 883                         &ret_data_len);
 884
 885 }
 886
 887 static int
 888 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 889                      const char *path, struct cifs_sb_info *cifs_sb,
 890                      struct cifs_fid *fid, __u16 search_flags,
 891                      struct cifs_search_info *srch_inf)
 892 {
 893         __le16 *utf16_path;
 894         int rc;
 895         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 896         struct cifs_open_parms oparms;
 897
 898         utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 899         if (!utf16_path)
 900                 return -ENOMEM;
 901
 902         oparms.tcon = tcon;
 903         oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
 904         oparms.disposition = FILE_OPEN;
 905         oparms.create_options = 0;
 906         oparms.fid = fid;
 907         oparms.reconnect = false;
 908
 909         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
 910         kfree(utf16_path);
 911         if (rc) {
 912                 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
 913                 return rc;
 914         }
 915
 916         srch_inf->entries_in_buffer = 0;
 917         srch_inf->index_of_last_entry = 2;
 918
 919         rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
 920                                   fid->volatile_fid, 0, srch_inf);
 921         if (rc) {
 922                 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
 923                 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 924         }
 925         return rc;
 926 }
 927
 928 static int
 929 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 930                     struct cifs_fid *fid, __u16 search_flags,
 931                     struct cifs_search_info *srch_inf)
 932 {
 933         return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 934                                     fid->volatile_fid, 0, srch_inf);
 935 }
 936
 937 static int
 938 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 939                struct cifs_fid *fid)
 940 {
 941         return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 942 }
 943
 944 /*
 945 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
 946 * the number of credits and return true. Otherwise - return false.
 947 */
 948 static bool
 949 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 950 {
 951         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 952
 953         if (hdr->Status != STATUS_PENDING)
 954                 return false;
 955
 956         if (!length) {
 957                 spin_lock(&server->req_lock);
 958                 server->credits += le16_to_cpu(hdr->CreditRequest);
 959                 spin_unlock(&server->req_lock);
 960                 wake_up(&server->request_q);
 961         }
 962
 963         return true;
 964 }
 965
 966 static bool
 967 smb2_is_session_expired(char *buf)
 968 {
 969         struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 970
 971         if (hdr->Status != STATUS_NETWORK_SESSION_EXPIRED)
 972                 return false;
 973
 974         cifs_dbg(FYI, "Session expired\n");
 975         return true;
 976 }
 977
 978 static int
 979 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 980                      struct cifsInodeInfo *cinode)
 981 {
 982         if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 983                 return SMB2_lease_break(0, tcon, cinode->lease_key,
 984                                         smb2_get_lease_state(cinode));
 985
 986         return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 987                                  fid->volatile_fid,
 988                                  CIFS_CACHE_READ(cinode) ? 1 : 0);
 989 }
 990
 991 static int
 992 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 993              struct kstatfs *buf)
 994 {
 995         int rc;
 996         __le16 srch_path = 0; /* Null - open root of share */
 997         u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 998         struct cifs_open_parms oparms;
 999         struct cifs_fid fid;
1000
1001         oparms.tcon = tcon;
1002         oparms.desired_access = FILE_READ_ATTRIBUTES;
1003         oparms.disposition = FILE_OPEN;
1004         oparms.create_options = 0;
1005         oparms.fid = &fid;
1006         oparms.reconnect = false;
1007
1008         rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1009         if (rc)
1010                 return rc;
1011         buf->f_type = SMB2_MAGIC_NUMBER;
1012         rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1013                            buf);
1014         SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1015         return rc;
1016 }
1017
1018 static bool
1019 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1020 {
1021         return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1022                ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1023 }
1024
1025 static int
1026 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1027                __u64 length, __u32 type, int lock, int unlock, bool wait)
1028 {
1029         if (unlock && !lock)
1030                 type = SMB2_LOCKFLAG_UNLOCK;
1031         return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1032                          cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1033                          current->tgid, length, offset, type, wait);
1034 }
1035
1036 static void
1037 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1038 {
1039         memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1040 }
1041
1042 static void
1043 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1044 {
1045         memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1046 }
1047
1048 static void
1049 smb2_new_lease_key(struct cifs_fid *fid)
1050 {
1051         generate_random_uuid(fid->lease_key);
1052 }
1053
1054 #define SMB2_SYMLINK_STRUCT_SIZE \
1055         (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1056
1057 static int
1058 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1059                    const char *full_path, char **target_path,
1060                    struct cifs_sb_info *cifs_sb)
1061 {
1062         int rc;
1063         __le16 *utf16_path;
1064         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1065         struct cifs_open_parms oparms;
1066         struct cifs_fid fid;
1067         struct smb2_err_rsp *err_buf = NULL;
1068         struct smb2_symlink_err_rsp *symlink;
1069         unsigned int sub_len;
1070         unsigned int sub_offset;
1071         unsigned int print_len;
1072         unsigned int print_offset;
1073
1074         cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1075
1076         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1077         if (!utf16_path)
1078                 return -ENOMEM;
1079
1080         oparms.tcon = tcon;
1081         oparms.desired_access = FILE_READ_ATTRIBUTES;
1082         oparms.disposition = FILE_OPEN;
1083         oparms.create_options = 0;
1084         oparms.fid = &fid;
1085         oparms.reconnect = false;
1086
1087         rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1088
1089         if (!rc || !err_buf) {
1090                 kfree(utf16_path);
1091                 return -ENOENT;
1092         }
1093
1094         if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1095             get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1096                 kfree(utf16_path);
1097                 return -ENOENT;
1098         }
1099
1100         /* open must fail on symlink - reset rc */
1101         rc = 0;
1102         symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1103         sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1104         sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1105         print_len = le16_to_cpu(symlink->PrintNameLength);
1106         print_offset = le16_to_cpu(symlink->PrintNameOffset);
1107
1108         if (get_rfc1002_length(err_buf) + 4 <
1109                         SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1110                 kfree(utf16_path);
1111                 return -ENOENT;
1112         }
1113
1114         if (get_rfc1002_length(err_buf) + 4 <
1115                         SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1116                 kfree(utf16_path);
1117                 return -ENOENT;
1118         }
1119
1120         *target_path = cifs_strndup_from_utf16(
1121                                 (char *)symlink->PathBuffer + sub_offset,
1122                                 sub_len, true, cifs_sb->local_nls);
1123         if (!(*target_path)) {
1124                 kfree(utf16_path);
1125                 return -ENOMEM;
1126         }
1127         convert_delimiter(*target_path, '/');
1128         cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1129         kfree(utf16_path);
1130         return rc;
1131 }
1132
1133 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1134                             loff_t offset, loff_t len, bool keep_size)
1135 {
1136         struct inode *inode;
1137         struct cifsInodeInfo *cifsi;
1138         struct cifsFileInfo *cfile = file->private_data;
1139         struct file_zero_data_information fsctl_buf;
1140         long rc;
1141         unsigned int xid;
1142
1143         xid = get_xid();
1144
1145         inode = d_inode(cfile->dentry);
1146         cifsi = CIFS_I(inode);
1147
1148         /* if file not oplocked can't be sure whether asking to extend size */
1149         if (!CIFS_CACHE_READ(cifsi))
1150                 if (keep_size == false)
1151                         return -EOPNOTSUPP;
1152
1153         /*
1154          * Must check if file sparse since fallocate -z (zero range) assumes
1155          * non-sparse allocation
1156          */
1157         if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1158                 return -EOPNOTSUPP;
1159
1160         /*
1161          * need to make sure we are not asked to extend the file since the SMB3
1162          * fsctl does not change the file size. In the future we could change
1163          * this to zero the first part of the range then set the file size
1164          * which for a non sparse file would zero the newly extended range
1165          */
1166         if (keep_size == false)
1167                 if (i_size_read(inode) < offset + len)
1168                         return -EOPNOTSUPP;
1169
1170         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1171
1172         fsctl_buf.FileOffset = cpu_to_le64(offset);
1173         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1174
1175         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1176                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1177                         true /* is_fctl */, (char *)&fsctl_buf,
1178                         sizeof(struct file_zero_data_information), NULL, NULL);
1179         free_xid(xid);
1180         return rc;
1181 }
1182
1183 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1184                             loff_t offset, loff_t len)
1185 {
1186         struct inode *inode;
1187         struct cifsInodeInfo *cifsi;
1188         struct cifsFileInfo *cfile = file->private_data;
1189         struct file_zero_data_information fsctl_buf;
1190         long rc;
1191         unsigned int xid;
1192         __u8 set_sparse = 1;
1193
1194         xid = get_xid();
1195
1196         inode = d_inode(cfile->dentry);
1197         cifsi = CIFS_I(inode);
1198
1199         /* Need to make file sparse, if not already, before freeing range. */
1200         /* Consider adding equivalent for compressed since it could also work */
1201         if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1202                 return -EOPNOTSUPP;
1203
1204         cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1205
1206         fsctl_buf.FileOffset = cpu_to_le64(offset);
1207         fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1208
1209         rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1210                         cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1211                         true /* is_fctl */, (char *)&fsctl_buf,
1212                         sizeof(struct file_zero_data_information), NULL, NULL);
1213         free_xid(xid);
1214         return rc;
1215 }
1216
1217 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1218                             loff_t off, loff_t len, bool keep_size)
1219 {
1220         struct inode *inode;
1221         struct cifsInodeInfo *cifsi;
1222         struct cifsFileInfo *cfile = file->private_data;
1223         long rc = -EOPNOTSUPP;
1224         unsigned int xid;
1225
1226         xid = get_xid();
1227
1228         inode = d_inode(cfile->dentry);
1229         cifsi = CIFS_I(inode);
1230
1231         /* if file not oplocked can't be sure whether asking to extend size */
1232         if (!CIFS_CACHE_READ(cifsi))
1233                 if (keep_size == false)
1234                         return -EOPNOTSUPP;
1235
1236         /*
1237          * Files are non-sparse by default so falloc may be a no-op
1238          * Must check if file sparse. If not sparse, and not extending
1239          * then no need to do anything since file already allocated
1240          */
1241         if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1242                 if (keep_size == true)
1243                         return 0;
1244                 /* check if extending file */
1245                 else if (i_size_read(inode) >= off + len)
1246                         /* not extending file and already not sparse */
1247                         return 0;
1248                 /* BB: in future add else clause to extend file */
1249                 else
1250                         return -EOPNOTSUPP;
1251         }
1252
1253         if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1254                 /*
1255                  * Check if falloc starts within first few pages of file
1256                  * and ends within a few pages of the end of file to
1257                  * ensure that most of file is being forced to be
1258                  * fallocated now. If so then setting whole file sparse
1259                  * ie potentially making a few extra pages at the beginning
1260                  * or end of the file non-sparse via set_sparse is harmless.
1261                  */
1262                 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1263                         return -EOPNOTSUPP;
1264
1265                 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1266         }
1267         /* BB: else ... in future add code to extend file and set sparse */
1268
1269
1270         free_xid(xid);
1271         return rc;
1272 }
1273
1274
1275 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1276                            loff_t off, loff_t len)
1277 {
1278         /* KEEP_SIZE already checked for by do_fallocate */
1279         if (mode & FALLOC_FL_PUNCH_HOLE)
1280                 return smb3_punch_hole(file, tcon, off, len);
1281         else if (mode & FALLOC_FL_ZERO_RANGE) {
1282                 if (mode & FALLOC_FL_KEEP_SIZE)
1283                         return smb3_zero_range(file, tcon, off, len, true);
1284                 return smb3_zero_range(file, tcon, off, len, false);
1285         } else if (mode == FALLOC_FL_KEEP_SIZE)
1286                 return smb3_simple_falloc(file, tcon, off, len, true);
1287         else if (mode == 0)
1288                 return smb3_simple_falloc(file, tcon, off, len, false);
1289
1290         return -EOPNOTSUPP;
1291 }
1292
1293 static void
1294 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1295                         struct cifsInodeInfo *cinode, bool set_level2)
1296 {
1297         if (set_level2)
1298                 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1299                                                 0, NULL);
1300         else
1301                 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1302 }
1303
1304 static void
1305 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1306                       unsigned int epoch, bool *purge_cache)
1307 {
1308         oplock &= 0xFF;
1309         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1310                 return;
1311         if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1312                 cinode->oplock = CIFS_CACHE_RHW_FLG;
1313                 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1314                          &cinode->vfs_inode);
1315         } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1316                 cinode->oplock = CIFS_CACHE_RW_FLG;
1317                 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1318                          &cinode->vfs_inode);
1319         } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1320                 cinode->oplock = CIFS_CACHE_READ_FLG;
1321                 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1322                          &cinode->vfs_inode);
1323         } else
1324                 cinode->oplock = 0;
1325 }
1326
1327 static void
1328 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1329                        unsigned int epoch, bool *purge_cache)
1330 {
1331         char message[5] = {0};
1332         unsigned int new_oplock = 0;
1333
1334         oplock &= 0xFF;
1335         if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1336                 return;
1337
1338         /* Check if the server granted an oplock rather than a lease */
1339         if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1340                 return smb2_set_oplock_level(cinode, oplock, epoch,
1341                                              purge_cache);
1342
1343         if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1344                 new_oplock |= CIFS_CACHE_READ_FLG;
1345                 strcat(message, "R");
1346         }
1347         if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1348                 new_oplock |= CIFS_CACHE_HANDLE_FLG;
1349                 strcat(message, "H");
1350         }
1351         if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1352                 new_oplock |= CIFS_CACHE_WRITE_FLG;
1353                 strcat(message, "W");
1354         }
1355         if (!new_oplock)
1356                 strncpy(message, "None", sizeof(message));
1357
1358         cinode->oplock = new_oplock;
1359         cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1360                  &cinode->vfs_inode);
1361 }
1362
1363 static void
1364 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1365                       unsigned int epoch, bool *purge_cache)
1366 {
1367         unsigned int old_oplock = cinode->oplock;
1368
1369         smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1370
1371         if (purge_cache) {
1372                 *purge_cache = false;
1373                 if (old_oplock == CIFS_CACHE_READ_FLG) {
1374                         if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1375                             (epoch - cinode->epoch > 0))
1376                                 *purge_cache = true;
1377                         else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1378                                  (epoch - cinode->epoch > 1))
1379                                 *purge_cache = true;
1380                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1381                                  (epoch - cinode->epoch > 1))
1382                                 *purge_cache = true;
1383                         else if (cinode->oplock == 0 &&
1384                                  (epoch - cinode->epoch > 0))
1385                                 *purge_cache = true;
1386                 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1387                         if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1388                             (epoch - cinode->epoch > 0))
1389                                 *purge_cache = true;
1390                         else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1391                                  (epoch - cinode->epoch > 1))
1392                                 *purge_cache = true;
1393                 }
1394                 cinode->epoch = epoch;
1395         }
1396 }
1397
1398 static bool
1399 smb2_is_read_op(__u32 oplock)
1400 {
1401         return oplock == SMB2_OPLOCK_LEVEL_II;
1402 }
1403
1404 static bool
1405 smb21_is_read_op(__u32 oplock)
1406 {
1407         return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1408                !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1409 }
1410
1411 static __le32
1412 map_oplock_to_lease(u8 oplock)
1413 {
1414         if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1415                 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1416         else if (oplock == SMB2_OPLOCK_LEVEL_II)
1417                 return SMB2_LEASE_READ_CACHING;
1418         else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1419                 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1420                        SMB2_LEASE_WRITE_CACHING;
1421         return 0;
1422 }
1423
1424 static char *
1425 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1426 {
1427         struct create_lease *buf;
1428
1429         buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1430         if (!buf)
1431                 return NULL;
1432
1433         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1434         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1435         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1436
1437         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1438                                         (struct create_lease, lcontext));
1439         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1440         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1441                                 (struct create_lease, Name));
1442         buf->ccontext.NameLength = cpu_to_le16(4);
1443         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1444         buf->Name[0] = 'R';
1445         buf->Name[1] = 'q';
1446         buf->Name[2] = 'L';
1447         buf->Name[3] = 's';
1448         return (char *)buf;
1449 }
1450
1451 static char *
1452 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1453 {
1454         struct create_lease_v2 *buf;
1455
1456         buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1457         if (!buf)
1458                 return NULL;
1459
1460         buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1461         buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1462         buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1463
1464         buf->ccontext.DataOffset = cpu_to_le16(offsetof
1465                                         (struct create_lease_v2, lcontext));
1466         buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1467         buf->ccontext.NameOffset = cpu_to_le16(offsetof
1468                                 (struct create_lease_v2, Name));
1469         buf->ccontext.NameLength = cpu_to_le16(4);
1470         /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1471         buf->Name[0] = 'R';
1472         buf->Name[1] = 'q';
1473         buf->Name[2] = 'L';
1474         buf->Name[3] = 's';
1475         return (char *)buf;
1476 }
1477
1478 static __u8
1479 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1480 {
1481         struct create_lease *lc = (struct create_lease *)buf;
1482
1483         *epoch = 0; /* not used */
1484         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1485                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1486         return le32_to_cpu(lc->lcontext.LeaseState);
1487 }
1488
1489 static __u8
1490 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1491 {
1492         struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1493
1494         *epoch = le16_to_cpu(lc->lcontext.Epoch);
1495         if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1496                 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1497         return le32_to_cpu(lc->lcontext.LeaseState);
1498 }
1499
1500 static unsigned int
1501 smb2_wp_retry_size(struct inode *inode)
1502 {
1503         return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1504                      SMB2_MAX_BUFFER_SIZE);
1505 }
1506
1507 static bool
1508 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1509 {
1510         return !cfile->invalidHandle;
1511 }
1512
1513 struct smb_version_operations smb20_operations = {
1514         .compare_fids = smb2_compare_fids,
1515         .setup_request = smb2_setup_request,
1516         .setup_async_request = smb2_setup_async_request,
1517         .check_receive = smb2_check_receive,
1518         .add_credits = smb2_add_credits,
1519         .set_credits = smb2_set_credits,
1520         .get_credits_field = smb2_get_credits_field,
1521         .get_credits = smb2_get_credits,
1522         .wait_mtu_credits = cifs_wait_mtu_credits,
1523         .get_next_mid = smb2_get_next_mid,
1524         .read_data_offset = smb2_read_data_offset,
1525         .read_data_length = smb2_read_data_length,
1526         .map_error = map_smb2_to_linux_error,
1527         .find_mid = smb2_find_mid,
1528         .check_message = smb2_check_message,
1529         .dump_detail = smb2_dump_detail,
1530         .clear_stats = smb2_clear_stats,
1531         .print_stats = smb2_print_stats,
1532         .is_oplock_break = smb2_is_valid_oplock_break,
1533         .handle_cancelled_mid = smb2_handle_cancelled_mid,
1534         .downgrade_oplock = smb2_downgrade_oplock,
1535         .need_neg = smb2_need_neg,
1536         .negotiate = smb2_negotiate,
1537         .negotiate_wsize = smb2_negotiate_wsize,
1538         .negotiate_rsize = smb2_negotiate_rsize,
1539         .sess_setup = SMB2_sess_setup,
1540         .logoff = SMB2_logoff,
1541         .tree_connect = SMB2_tcon,
1542         .tree_disconnect = SMB2_tdis,
1543         .qfs_tcon = smb2_qfs_tcon,
1544         .is_path_accessible = smb2_is_path_accessible,
1545         .can_echo = smb2_can_echo,
1546         .echo = SMB2_echo,
1547         .query_path_info = smb2_query_path_info,
1548         .get_srv_inum = smb2_get_srv_inum,
1549         .query_file_info = smb2_query_file_info,
1550         .set_path_size = smb2_set_path_size,
1551         .set_file_size = smb2_set_file_size,
1552         .set_file_info = smb2_set_file_info,
1553         .set_compression = smb2_set_compression,
1554         .mkdir = smb2_mkdir,
1555         .mkdir_setinfo = smb2_mkdir_setinfo,
1556         .rmdir = smb2_rmdir,
1557         .unlink = smb2_unlink,
1558         .rename = smb2_rename_path,
1559         .create_hardlink = smb2_create_hardlink,
1560         .query_symlink = smb2_query_symlink,
1561         .open = smb2_open_file,
1562         .set_fid = smb2_set_fid,
1563         .close = smb2_close_file,
1564         .flush = smb2_flush_file,
1565         .async_readv = smb2_async_readv,
1566         .async_writev = smb2_async_writev,
1567         .sync_read = smb2_sync_read,
1568         .sync_write = smb2_sync_write,
1569         .query_dir_first = smb2_query_dir_first,
1570         .query_dir_next = smb2_query_dir_next,
1571         .close_dir = smb2_close_dir,
1572         .calc_smb_size = smb2_calc_size,
1573         .is_status_pending = smb2_is_status_pending,
1574         .is_session_expired = smb2_is_session_expired,
1575         .oplock_response = smb2_oplock_response,
1576         .queryfs = smb2_queryfs,
1577         .mand_lock = smb2_mand_lock,
1578         .mand_unlock_range = smb2_unlock_range,
1579         .push_mand_locks = smb2_push_mandatory_locks,
1580         .get_lease_key = smb2_get_lease_key,
1581         .set_lease_key = smb2_set_lease_key,
1582         .new_lease_key = smb2_new_lease_key,
1583         .calc_signature = smb2_calc_signature,
1584         .is_read_op = smb2_is_read_op,
1585         .set_oplock_level = smb2_set_oplock_level,
1586         .create_lease_buf = smb2_create_lease_buf,
1587         .parse_lease_buf = smb2_parse_lease_buf,
1588         .clone_range = smb2_clone_range,
1589         .wp_retry_size = smb2_wp_retry_size,
1590         .dir_needs_close = smb2_dir_needs_close,
1591 };
1592
1593 struct smb_version_operations smb21_operations = {
1594         .compare_fids = smb2_compare_fids,
1595         .setup_request = smb2_setup_request,
1596         .setup_async_request = smb2_setup_async_request,
1597         .check_receive = smb2_check_receive,
1598         .add_credits = smb2_add_credits,
1599         .set_credits = smb2_set_credits,
1600         .get_credits_field = smb2_get_credits_field,
1601         .get_credits = smb2_get_credits,
1602         .wait_mtu_credits = smb2_wait_mtu_credits,
1603         .get_next_mid = smb2_get_next_mid,
1604         .read_data_offset = smb2_read_data_offset,
1605         .read_data_length = smb2_read_data_length,
1606         .map_error = map_smb2_to_linux_error,
1607         .find_mid = smb2_find_mid,
1608         .check_message = smb2_check_message,
1609         .dump_detail = smb2_dump_detail,
1610         .clear_stats = smb2_clear_stats,
1611         .print_stats = smb2_print_stats,
1612         .is_oplock_break = smb2_is_valid_oplock_break,
1613         .handle_cancelled_mid = smb2_handle_cancelled_mid,
1614         .downgrade_oplock = smb2_downgrade_oplock,
1615         .need_neg = smb2_need_neg,
1616         .negotiate = smb2_negotiate,
1617         .negotiate_wsize = smb2_negotiate_wsize,
1618         .negotiate_rsize = smb2_negotiate_rsize,
1619         .sess_setup = SMB2_sess_setup,
1620         .logoff = SMB2_logoff,
1621         .tree_connect = SMB2_tcon,
1622         .tree_disconnect = SMB2_tdis,
1623         .qfs_tcon = smb2_qfs_tcon,
1624         .is_path_accessible = smb2_is_path_accessible,
1625         .can_echo = smb2_can_echo,
1626         .echo = SMB2_echo,
1627         .query_path_info = smb2_query_path_info,
1628         .get_srv_inum = smb2_get_srv_inum,
1629         .query_file_info = smb2_query_file_info,
1630         .set_path_size = smb2_set_path_size,
1631         .set_file_size = smb2_set_file_size,
1632         .set_file_info = smb2_set_file_info,
1633         .set_compression = smb2_set_compression,
1634         .mkdir = smb2_mkdir,
1635         .mkdir_setinfo = smb2_mkdir_setinfo,
1636         .rmdir = smb2_rmdir,
1637         .unlink = smb2_unlink,
1638         .rename = smb2_rename_path,
1639         .create_hardlink = smb2_create_hardlink,
1640         .query_symlink = smb2_query_symlink,
1641         .query_mf_symlink = smb3_query_mf_symlink,
1642         .create_mf_symlink = smb3_create_mf_symlink,
1643         .open = smb2_open_file,
1644         .set_fid = smb2_set_fid,
1645         .close = smb2_close_file,
1646         .flush = smb2_flush_file,
1647         .async_readv = smb2_async_readv,
1648         .async_writev = smb2_async_writev,
1649         .sync_read = smb2_sync_read,
1650         .sync_write = smb2_sync_write,
1651         .query_dir_first = smb2_query_dir_first,
1652         .query_dir_next = smb2_query_dir_next,
1653         .close_dir = smb2_close_dir,
1654         .calc_smb_size = smb2_calc_size,
1655         .is_status_pending = smb2_is_status_pending,
1656         .is_session_expired = smb2_is_session_expired,
1657         .oplock_response = smb2_oplock_response,
1658         .queryfs = smb2_queryfs,
1659         .mand_lock = smb2_mand_lock,
1660         .mand_unlock_range = smb2_unlock_range,
1661         .push_mand_locks = smb2_push_mandatory_locks,
1662         .get_lease_key = smb2_get_lease_key,
1663         .set_lease_key = smb2_set_lease_key,
1664         .new_lease_key = smb2_new_lease_key,
1665         .calc_signature = smb2_calc_signature,
1666         .is_read_op = smb21_is_read_op,
1667         .set_oplock_level = smb21_set_oplock_level,
1668         .create_lease_buf = smb2_create_lease_buf,
1669         .parse_lease_buf = smb2_parse_lease_buf,
1670         .clone_range = smb2_clone_range,
1671         .wp_retry_size = smb2_wp_retry_size,
1672         .dir_needs_close = smb2_dir_needs_close,
1673 };
1674
1675 struct smb_version_operations smb30_operations = {
1676         .compare_fids = smb2_compare_fids,
1677         .setup_request = smb2_setup_request,
1678         .setup_async_request = smb2_setup_async_request,
1679         .check_receive = smb2_check_receive,
1680         .add_credits = smb2_add_credits,
1681         .set_credits = smb2_set_credits,
1682         .get_credits_field = smb2_get_credits_field,
1683         .get_credits = smb2_get_credits,
1684         .wait_mtu_credits = smb2_wait_mtu_credits,
1685         .get_next_mid = smb2_get_next_mid,
1686         .read_data_offset = smb2_read_data_offset,
1687         .read_data_length = smb2_read_data_length,
1688         .map_error = map_smb2_to_linux_error,
1689         .find_mid = smb2_find_mid,
1690         .check_message = smb2_check_message,
1691         .dump_detail = smb2_dump_detail,
1692         .clear_stats = smb2_clear_stats,
1693         .print_stats = smb2_print_stats,
1694         .dump_share_caps = smb2_dump_share_caps,
1695         .is_oplock_break = smb2_is_valid_oplock_break,
1696         .handle_cancelled_mid = smb2_handle_cancelled_mid,
1697         .downgrade_oplock = smb2_downgrade_oplock,
1698         .need_neg = smb2_need_neg,
1699         .negotiate = smb2_negotiate,
1700         .negotiate_wsize = smb2_negotiate_wsize,
1701         .negotiate_rsize = smb2_negotiate_rsize,
1702         .sess_setup = SMB2_sess_setup,
1703         .logoff = SMB2_logoff,
1704         .tree_connect = SMB2_tcon,
1705         .tree_disconnect = SMB2_tdis,
1706         .qfs_tcon = smb3_qfs_tcon,
1707         .is_path_accessible = smb2_is_path_accessible,
1708         .can_echo = smb2_can_echo,
1709         .echo = SMB2_echo,
1710         .query_path_info = smb2_query_path_info,
1711         .get_srv_inum = smb2_get_srv_inum,
1712         .query_file_info = smb2_query_file_info,
1713         .set_path_size = smb2_set_path_size,
1714         .set_file_size = smb2_set_file_size,
1715         .set_file_info = smb2_set_file_info,
1716         .set_compression = smb2_set_compression,
1717         .mkdir = smb2_mkdir,
1718         .mkdir_setinfo = smb2_mkdir_setinfo,
1719         .rmdir = smb2_rmdir,
1720         .unlink = smb2_unlink,
1721         .rename = smb2_rename_path,
1722         .create_hardlink = smb2_create_hardlink,
1723         .query_symlink = smb2_query_symlink,
1724         .query_mf_symlink = smb3_query_mf_symlink,
1725         .create_mf_symlink = smb3_create_mf_symlink,
1726         .open = smb2_open_file,
1727         .set_fid = smb2_set_fid,
1728         .close = smb2_close_file,
1729         .flush = smb2_flush_file,
1730         .async_readv = smb2_async_readv,
1731         .async_writev = smb2_async_writev,
1732         .sync_read = smb2_sync_read,
1733         .sync_write = smb2_sync_write,
1734         .query_dir_first = smb2_query_dir_first,
1735         .query_dir_next = smb2_query_dir_next,
1736         .close_dir = smb2_close_dir,
1737         .calc_smb_size = smb2_calc_size,
1738         .is_status_pending = smb2_is_status_pending,
1739         .is_session_expired = smb2_is_session_expired,
1740         .oplock_response = smb2_oplock_response,
1741         .queryfs = smb2_queryfs,
1742         .mand_lock = smb2_mand_lock,
1743         .mand_unlock_range = smb2_unlock_range,
1744         .push_mand_locks = smb2_push_mandatory_locks,
1745         .get_lease_key = smb2_get_lease_key,
1746         .set_lease_key = smb2_set_lease_key,
1747         .new_lease_key = smb2_new_lease_key,
1748         .generate_signingkey = generate_smb3signingkey,
1749         .calc_signature = smb3_calc_signature,
1750         .set_integrity  = smb3_set_integrity,
1751         .is_read_op = smb21_is_read_op,
1752         .set_oplock_level = smb3_set_oplock_level,
1753         .create_lease_buf = smb3_create_lease_buf,
1754         .parse_lease_buf = smb3_parse_lease_buf,
1755         .clone_range = smb2_clone_range,
1756         .duplicate_extents = smb2_duplicate_extents,
1757         .validate_negotiate = smb3_validate_negotiate,
1758         .wp_retry_size = smb2_wp_retry_size,
1759         .dir_needs_close = smb2_dir_needs_close,
1760         .fallocate = smb3_fallocate,
1761 };
1762
1763 #ifdef CONFIG_CIFS_SMB311
1764 struct smb_version_operations smb311_operations = {
1765         .compare_fids = smb2_compare_fids,
1766         .setup_request = smb2_setup_request,
1767         .setup_async_request = smb2_setup_async_request,
1768         .check_receive = smb2_check_receive,
1769         .add_credits = smb2_add_credits,
1770         .set_credits = smb2_set_credits,
1771         .get_credits_field = smb2_get_credits_field,
1772         .get_credits = smb2_get_credits,
1773         .wait_mtu_credits = smb2_wait_mtu_credits,
1774         .get_next_mid = smb2_get_next_mid,
1775         .read_data_offset = smb2_read_data_offset,
1776         .read_data_length = smb2_read_data_length,
1777         .map_error = map_smb2_to_linux_error,
1778         .find_mid = smb2_find_mid,
1779         .check_message = smb2_check_message,
1780         .dump_detail = smb2_dump_detail,
1781         .clear_stats = smb2_clear_stats,
1782         .print_stats = smb2_print_stats,
1783         .dump_share_caps = smb2_dump_share_caps,
1784         .is_oplock_break = smb2_is_valid_oplock_break,
1785         .handle_cancelled_mid = smb2_handle_cancelled_mid,
1786         .downgrade_oplock = smb2_downgrade_oplock,
1787         .need_neg = smb2_need_neg,
1788         .negotiate = smb2_negotiate,
1789         .negotiate_wsize = smb2_negotiate_wsize,
1790         .negotiate_rsize = smb2_negotiate_rsize,
1791         .sess_setup = SMB2_sess_setup,
1792         .logoff = SMB2_logoff,
1793         .tree_connect = SMB2_tcon,
1794         .tree_disconnect = SMB2_tdis,
1795         .qfs_tcon = smb3_qfs_tcon,
1796         .is_path_accessible = smb2_is_path_accessible,
1797         .can_echo = smb2_can_echo,
1798         .echo = SMB2_echo,
1799         .query_path_info = smb2_query_path_info,
1800         .get_srv_inum = smb2_get_srv_inum,
1801         .query_file_info = smb2_query_file_info,
1802         .set_path_size = smb2_set_path_size,
1803         .set_file_size = smb2_set_file_size,
1804         .set_file_info = smb2_set_file_info,
1805         .set_compression = smb2_set_compression,
1806         .mkdir = smb2_mkdir,
1807         .mkdir_setinfo = smb2_mkdir_setinfo,
1808         .rmdir = smb2_rmdir,
1809         .unlink = smb2_unlink,
1810         .rename = smb2_rename_path,
1811         .create_hardlink = smb2_create_hardlink,
1812         .query_symlink = smb2_query_symlink,
1813         .query_mf_symlink = smb3_query_mf_symlink,
1814         .create_mf_symlink = smb3_create_mf_symlink,
1815         .open = smb2_open_file,
1816         .set_fid = smb2_set_fid,
1817         .close = smb2_close_file,
1818         .flush = smb2_flush_file,
1819         .async_readv = smb2_async_readv,
1820         .async_writev = smb2_async_writev,
1821         .sync_read = smb2_sync_read,
1822         .sync_write = smb2_sync_write,
1823         .query_dir_first = smb2_query_dir_first,
1824         .query_dir_next = smb2_query_dir_next,
1825         .close_dir = smb2_close_dir,
1826         .calc_smb_size = smb2_calc_size,
1827         .is_status_pending = smb2_is_status_pending,
1828         .is_session_expired = smb2_is_session_expired,
1829         .oplock_response = smb2_oplock_response,
1830         .queryfs = smb2_queryfs,
1831         .mand_lock = smb2_mand_lock,
1832         .mand_unlock_range = smb2_unlock_range,
1833         .push_mand_locks = smb2_push_mandatory_locks,
1834         .get_lease_key = smb2_get_lease_key,
1835         .set_lease_key = smb2_set_lease_key,
1836         .new_lease_key = smb2_new_lease_key,
1837         .generate_signingkey = generate_smb3signingkey,
1838         .calc_signature = smb3_calc_signature,
1839         .set_integrity  = smb3_set_integrity,
1840         .is_read_op = smb21_is_read_op,
1841         .set_oplock_level = smb3_set_oplock_level,
1842         .create_lease_buf = smb3_create_lease_buf,
1843         .parse_lease_buf = smb3_parse_lease_buf,
1844         .clone_range = smb2_clone_range,
1845         .duplicate_extents = smb2_duplicate_extents,
1846 /*      .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1847         .wp_retry_size = smb2_wp_retry_size,
1848         .dir_needs_close = smb2_dir_needs_close,
1849         .fallocate = smb3_fallocate,
1850 };
1851 #endif /* CIFS_SMB311 */
1852
1853 struct smb_version_values smb20_values = {
1854         .version_string = SMB20_VERSION_STRING,
1855         .protocol_id = SMB20_PROT_ID,
1856         .req_capabilities = 0, /* MBZ */
1857         .large_lock_type = 0,
1858         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1859         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1860         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1861         .header_size = sizeof(struct smb2_hdr),
1862         .max_header_size = MAX_SMB2_HDR_SIZE,
1863         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1864         .lock_cmd = SMB2_LOCK,
1865         .cap_unix = 0,
1866         .cap_nt_find = SMB2_NT_FIND,
1867         .cap_large_files = SMB2_LARGE_FILES,
1868         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1869         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1870         .create_lease_size = sizeof(struct create_lease),
1871 };
1872
1873 struct smb_version_values smb21_values = {
1874         .version_string = SMB21_VERSION_STRING,
1875         .protocol_id = SMB21_PROT_ID,
1876         .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1877         .large_lock_type = 0,
1878         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1879         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1880         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1881         .header_size = sizeof(struct smb2_hdr),
1882         .max_header_size = MAX_SMB2_HDR_SIZE,
1883         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1884         .lock_cmd = SMB2_LOCK,
1885         .cap_unix = 0,
1886         .cap_nt_find = SMB2_NT_FIND,
1887         .cap_large_files = SMB2_LARGE_FILES,
1888         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1889         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1890         .create_lease_size = sizeof(struct create_lease),
1891 };
1892
1893 struct smb_version_values smb30_values = {
1894         .version_string = SMB30_VERSION_STRING,
1895         .protocol_id = SMB30_PROT_ID,
1896         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1897         .large_lock_type = 0,
1898         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1899         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1900         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1901         .header_size = sizeof(struct smb2_hdr),
1902         .max_header_size = MAX_SMB2_HDR_SIZE,
1903         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1904         .lock_cmd = SMB2_LOCK,
1905         .cap_unix = 0,
1906         .cap_nt_find = SMB2_NT_FIND,
1907         .cap_large_files = SMB2_LARGE_FILES,
1908         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1909         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1910         .create_lease_size = sizeof(struct create_lease_v2),
1911 };
1912
1913 struct smb_version_values smb302_values = {
1914         .version_string = SMB302_VERSION_STRING,
1915         .protocol_id = SMB302_PROT_ID,
1916         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1917         .large_lock_type = 0,
1918         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1919         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1920         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1921         .header_size = sizeof(struct smb2_hdr),
1922         .max_header_size = MAX_SMB2_HDR_SIZE,
1923         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1924         .lock_cmd = SMB2_LOCK,
1925         .cap_unix = 0,
1926         .cap_nt_find = SMB2_NT_FIND,
1927         .cap_large_files = SMB2_LARGE_FILES,
1928         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1929         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1930         .create_lease_size = sizeof(struct create_lease_v2),
1931 };
1932
1933 #ifdef CONFIG_CIFS_SMB311
1934 struct smb_version_values smb311_values = {
1935         .version_string = SMB311_VERSION_STRING,
1936         .protocol_id = SMB311_PROT_ID,
1937         .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1938         .large_lock_type = 0,
1939         .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1940         .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1941         .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1942         .header_size = sizeof(struct smb2_hdr),
1943         .max_header_size = MAX_SMB2_HDR_SIZE,
1944         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1945         .lock_cmd = SMB2_LOCK,
1946         .cap_unix = 0,
1947         .cap_nt_find = SMB2_NT_FIND,
1948         .cap_large_files = SMB2_LARGE_FILES,
1949         .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1950         .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1951         .create_lease_size = sizeof(struct create_lease_v2),
1952 };
1953 #endif /* SMB311 */