linux/fs/cifs/smb2ops.c
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   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 "cifsglob.h"
  23#include "smb2pdu.h"
  24#include "smb2proto.h"
  25#include "cifsproto.h"
  26#include "cifs_debug.h"
  27#include "smb2status.h"
  28#include "smb2glob.h"
  29
  30static int
  31change_conf(struct TCP_Server_Info *server)
  32{
  33        server->credits += server->echo_credits + server->oplock_credits;
  34        server->oplock_credits = server->echo_credits = 0;
  35        switch (server->credits) {
  36        case 0:
  37                return -1;
  38        case 1:
  39                server->echoes = false;
  40                server->oplocks = false;
  41                cERROR(1, "disabling echoes and oplocks");
  42                break;
  43        case 2:
  44                server->echoes = true;
  45                server->oplocks = false;
  46                server->echo_credits = 1;
  47                cFYI(1, "disabling oplocks");
  48                break;
  49        default:
  50                server->echoes = true;
  51                server->oplocks = true;
  52                server->echo_credits = 1;
  53                server->oplock_credits = 1;
  54        }
  55        server->credits -= server->echo_credits + server->oplock_credits;
  56        return 0;
  57}
  58
  59static void
  60smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
  61                 const int optype)
  62{
  63        int *val, rc = 0;
  64        spin_lock(&server->req_lock);
  65        val = server->ops->get_credits_field(server, optype);
  66        *val += add;
  67        server->in_flight--;
  68        if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
  69                rc = change_conf(server);
  70        /*
  71         * Sometimes server returns 0 credits on oplock break ack - we need to
  72         * rebalance credits in this case.
  73         */
  74        else if (server->in_flight > 0 && server->oplock_credits == 0 &&
  75                 server->oplocks) {
  76                if (server->credits > 1) {
  77                        server->credits--;
  78                        server->oplock_credits++;
  79                }
  80        }
  81        spin_unlock(&server->req_lock);
  82        wake_up(&server->request_q);
  83        if (rc)
  84                cifs_reconnect(server);
  85}
  86
  87static void
  88smb2_set_credits(struct TCP_Server_Info *server, const int val)
  89{
  90        spin_lock(&server->req_lock);
  91        server->credits = val;
  92        spin_unlock(&server->req_lock);
  93}
  94
  95static int *
  96smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
  97{
  98        switch (optype) {
  99        case CIFS_ECHO_OP:
 100                return &server->echo_credits;
 101        case CIFS_OBREAK_OP:
 102                return &server->oplock_credits;
 103        default:
 104                return &server->credits;
 105        }
 106}
 107
 108static unsigned int
 109smb2_get_credits(struct mid_q_entry *mid)
 110{
 111        return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
 112}
 113
 114static __u64
 115smb2_get_next_mid(struct TCP_Server_Info *server)
 116{
 117        __u64 mid;
 118        /* for SMB2 we need the current value */
 119        spin_lock(&GlobalMid_Lock);
 120        mid = server->CurrentMid++;
 121        spin_unlock(&GlobalMid_Lock);
 122        return mid;
 123}
 124
 125static struct mid_q_entry *
 126smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 127{
 128        struct mid_q_entry *mid;
 129        struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 130
 131        spin_lock(&GlobalMid_Lock);
 132        list_for_each_entry(mid, &server->pending_mid_q, qhead) {
 133                if ((mid->mid == hdr->MessageId) &&
 134                    (mid->mid_state == MID_REQUEST_SUBMITTED) &&
 135                    (mid->command == hdr->Command)) {
 136                        spin_unlock(&GlobalMid_Lock);
 137                        return mid;
 138                }
 139        }
 140        spin_unlock(&GlobalMid_Lock);
 141        return NULL;
 142}
 143
 144static void
 145smb2_dump_detail(void *buf)
 146{
 147#ifdef CONFIG_CIFS_DEBUG2
 148        struct smb2_hdr *smb = (struct smb2_hdr *)buf;
 149
 150        cERROR(1, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d",
 151                  smb->Command, smb->Status, smb->Flags, smb->MessageId,
 152                  smb->ProcessId);
 153        cERROR(1, "smb buf %p len %u", smb, smb2_calc_size(smb));
 154#endif
 155}
 156
 157static bool
 158smb2_need_neg(struct TCP_Server_Info *server)
 159{
 160        return server->max_read == 0;
 161}
 162
 163static int
 164smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 165{
 166        int rc;
 167        ses->server->CurrentMid = 0;
 168        rc = SMB2_negotiate(xid, ses);
 169        /* BB we probably don't need to retry with modern servers */
 170        if (rc == -EAGAIN)
 171                rc = -EHOSTDOWN;
 172        return rc;
 173}
 174
 175static unsigned int
 176smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 177{
 178        struct TCP_Server_Info *server = tcon->ses->server;
 179        unsigned int wsize;
 180
 181        /* start with specified wsize, or default */
 182        wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
 183        wsize = min_t(unsigned int, wsize, server->max_write);
 184        /*
 185         * limit write size to 2 ** 16, because we don't support multicredit
 186         * requests now.
 187         */
 188        wsize = min_t(unsigned int, wsize, 2 << 15);
 189
 190        return wsize;
 191}
 192
 193static unsigned int
 194smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 195{
 196        struct TCP_Server_Info *server = tcon->ses->server;
 197        unsigned int rsize;
 198
 199        /* start with specified rsize, or default */
 200        rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
 201        rsize = min_t(unsigned int, rsize, server->max_read);
 202        /*
 203         * limit write size to 2 ** 16, because we don't support multicredit
 204         * requests now.
 205         */
 206        rsize = min_t(unsigned int, rsize, 2 << 15);
 207
 208        return rsize;
 209}
 210
 211static int
 212smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
 213                        struct cifs_sb_info *cifs_sb, const char *full_path)
 214{
 215        int rc;
 216        __u64 persistent_fid, volatile_fid;
 217        __le16 *utf16_path;
 218        __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 219
 220        utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 221        if (!utf16_path)
 222                return -ENOMEM;
 223
 224        rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
 225                       FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, &oplock, NULL);
 226        if (rc) {
 227                kfree(utf16_path);
 228                return rc;
 229        }
 230
 231        rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
 232        kfree(utf16_path);
 233        return rc;
 234}
 235
 236static int
 237smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
 238                  struct cifs_sb_info *cifs_sb, const char *full_path,
 239                  u64 *uniqueid, FILE_ALL_INFO *data)
 240{
 241        *uniqueid = le64_to_cpu(data->IndexNumber);
 242        return 0;
 243}
 244
 245static int
 246smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
 247                     struct cifs_fid *fid, FILE_ALL_INFO *data)
 248{
 249        int rc;
 250        struct smb2_file_all_info *smb2_data;
 251
 252        smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
 253                            GFP_KERNEL);
 254        if (smb2_data == NULL)
 255                return -ENOMEM;
 256
 257        rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
 258                             smb2_data);
 259        if (!rc)
 260                move_smb2_info_to_cifs(data, smb2_data);
 261        kfree(smb2_data);
 262        return rc;
 263}
 264
 265static char *
 266smb2_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
 267                        struct cifs_tcon *tcon)
 268{
 269        int pplen = vol->prepath ? strlen(vol->prepath) : 0;
 270        char *full_path = NULL;
 271
 272        /* if no prefix path, simply set path to the root of share to "" */
 273        if (pplen == 0) {
 274                full_path = kzalloc(2, GFP_KERNEL);
 275                return full_path;
 276        }
 277
 278        cERROR(1, "prefixpath is not supported for SMB2 now");
 279        return NULL;
 280}
 281
 282static bool
 283smb2_can_echo(struct TCP_Server_Info *server)
 284{
 285        return server->echoes;
 286}
 287
 288static void
 289smb2_clear_stats(struct cifs_tcon *tcon)
 290{
 291#ifdef CONFIG_CIFS_STATS
 292        int i;
 293        for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 294                atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 295                atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
 296        }
 297#endif
 298}
 299
 300static void
 301smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
 302{
 303#ifdef CONFIG_CIFS_STATS
 304        atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
 305        atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
 306        seq_printf(m, "\nNegotiates: %d sent %d failed",
 307                   atomic_read(&sent[SMB2_NEGOTIATE_HE]),
 308                   atomic_read(&failed[SMB2_NEGOTIATE_HE]));
 309        seq_printf(m, "\nSessionSetups: %d sent %d failed",
 310                   atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
 311                   atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
 312#define SMB2LOGOFF              0x0002 /* trivial request/resp */
 313        seq_printf(m, "\nLogoffs: %d sent %d failed",
 314                   atomic_read(&sent[SMB2_LOGOFF_HE]),
 315                   atomic_read(&failed[SMB2_LOGOFF_HE]));
 316        seq_printf(m, "\nTreeConnects: %d sent %d failed",
 317                   atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
 318                   atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
 319        seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
 320                   atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
 321                   atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
 322        seq_printf(m, "\nCreates: %d sent %d failed",
 323                   atomic_read(&sent[SMB2_CREATE_HE]),
 324                   atomic_read(&failed[SMB2_CREATE_HE]));
 325        seq_printf(m, "\nCloses: %d sent %d failed",
 326                   atomic_read(&sent[SMB2_CLOSE_HE]),
 327                   atomic_read(&failed[SMB2_CLOSE_HE]));
 328        seq_printf(m, "\nFlushes: %d sent %d failed",
 329                   atomic_read(&sent[SMB2_FLUSH_HE]),
 330                   atomic_read(&failed[SMB2_FLUSH_HE]));
 331        seq_printf(m, "\nReads: %d sent %d failed",
 332                   atomic_read(&sent[SMB2_READ_HE]),
 333                   atomic_read(&failed[SMB2_READ_HE]));
 334        seq_printf(m, "\nWrites: %d sent %d failed",
 335                   atomic_read(&sent[SMB2_WRITE_HE]),
 336                   atomic_read(&failed[SMB2_WRITE_HE]));
 337        seq_printf(m, "\nLocks: %d sent %d failed",
 338                   atomic_read(&sent[SMB2_LOCK_HE]),
 339                   atomic_read(&failed[SMB2_LOCK_HE]));
 340        seq_printf(m, "\nIOCTLs: %d sent %d failed",
 341                   atomic_read(&sent[SMB2_IOCTL_HE]),
 342                   atomic_read(&failed[SMB2_IOCTL_HE]));
 343        seq_printf(m, "\nCancels: %d sent %d failed",
 344                   atomic_read(&sent[SMB2_CANCEL_HE]),
 345                   atomic_read(&failed[SMB2_CANCEL_HE]));
 346        seq_printf(m, "\nEchos: %d sent %d failed",
 347                   atomic_read(&sent[SMB2_ECHO_HE]),
 348                   atomic_read(&failed[SMB2_ECHO_HE]));
 349        seq_printf(m, "\nQueryDirectories: %d sent %d failed",
 350                   atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
 351                   atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
 352        seq_printf(m, "\nChangeNotifies: %d sent %d failed",
 353                   atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
 354                   atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
 355        seq_printf(m, "\nQueryInfos: %d sent %d failed",
 356                   atomic_read(&sent[SMB2_QUERY_INFO_HE]),
 357                   atomic_read(&failed[SMB2_QUERY_INFO_HE]));
 358        seq_printf(m, "\nSetInfos: %d sent %d failed",
 359                   atomic_read(&sent[SMB2_SET_INFO_HE]),
 360                   atomic_read(&failed[SMB2_SET_INFO_HE]));
 361        seq_printf(m, "\nOplockBreaks: %d sent %d failed",
 362                   atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
 363                   atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
 364#endif
 365}
 366
 367static void
 368smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
 369{
 370        struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
 371        cfile->fid.persistent_fid = fid->persistent_fid;
 372        cfile->fid.volatile_fid = fid->volatile_fid;
 373        smb2_set_oplock_level(cinode, oplock);
 374        cinode->can_cache_brlcks = cinode->clientCanCacheAll;
 375}
 376
 377static void
 378smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
 379                struct cifs_fid *fid)
 380{
 381        SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 382}
 383
 384static int
 385smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
 386                struct cifs_fid *fid)
 387{
 388        return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 389}
 390
 391static unsigned int
 392smb2_read_data_offset(char *buf)
 393{
 394        struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 395        return rsp->DataOffset;
 396}
 397
 398static unsigned int
 399smb2_read_data_length(char *buf)
 400{
 401        struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
 402        return le32_to_cpu(rsp->DataLength);
 403}
 404
 405
 406static int
 407smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
 408               struct cifs_io_parms *parms, unsigned int *bytes_read,
 409               char **buf, int *buf_type)
 410{
 411        parms->persistent_fid = cfile->fid.persistent_fid;
 412        parms->volatile_fid = cfile->fid.volatile_fid;
 413        return SMB2_read(xid, parms, bytes_read, buf, buf_type);
 414}
 415
 416static int
 417smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
 418                struct cifs_io_parms *parms, unsigned int *written,
 419                struct kvec *iov, unsigned long nr_segs)
 420{
 421
 422        parms->persistent_fid = cfile->fid.persistent_fid;
 423        parms->volatile_fid = cfile->fid.volatile_fid;
 424        return SMB2_write(xid, parms, written, iov, nr_segs);
 425}
 426
 427static int
 428smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
 429                   struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
 430{
 431        __le64 eof = cpu_to_le64(size);
 432        return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
 433                            cfile->fid.volatile_fid, cfile->pid, &eof);
 434}
 435
 436static int
 437smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
 438                     const char *path, struct cifs_sb_info *cifs_sb,
 439                     struct cifs_fid *fid, __u16 search_flags,
 440                     struct cifs_search_info *srch_inf)
 441{
 442        __le16 *utf16_path;
 443        int rc;
 444        __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 445        __u64 persistent_fid, volatile_fid;
 446
 447        utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
 448        if (!utf16_path)
 449                return -ENOMEM;
 450
 451        rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
 452                       FILE_READ_ATTRIBUTES | FILE_READ_DATA, FILE_OPEN, 0, 0,
 453                       &oplock, NULL);
 454        kfree(utf16_path);
 455        if (rc) {
 456                cERROR(1, "open dir failed");
 457                return rc;
 458        }
 459
 460        srch_inf->entries_in_buffer = 0;
 461        srch_inf->index_of_last_entry = 0;
 462        fid->persistent_fid = persistent_fid;
 463        fid->volatile_fid = volatile_fid;
 464
 465        rc = SMB2_query_directory(xid, tcon, persistent_fid, volatile_fid, 0,
 466                                  srch_inf);
 467        if (rc) {
 468                cERROR(1, "query directory failed");
 469                SMB2_close(xid, tcon, persistent_fid, volatile_fid);
 470        }
 471        return rc;
 472}
 473
 474static int
 475smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
 476                    struct cifs_fid *fid, __u16 search_flags,
 477                    struct cifs_search_info *srch_inf)
 478{
 479        return SMB2_query_directory(xid, tcon, fid->persistent_fid,
 480                                    fid->volatile_fid, 0, srch_inf);
 481}
 482
 483static int
 484smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 485               struct cifs_fid *fid)
 486{
 487        return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
 488}
 489
 490/*
 491* If we negotiate SMB2 protocol and get STATUS_PENDING - update
 492* the number of credits and return true. Otherwise - return false.
 493*/
 494static bool
 495smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
 496{
 497        struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
 498
 499        if (hdr->Status != STATUS_PENDING)
 500                return false;
 501
 502        if (!length) {
 503                spin_lock(&server->req_lock);
 504                server->credits += le16_to_cpu(hdr->CreditRequest);
 505                spin_unlock(&server->req_lock);
 506                wake_up(&server->request_q);
 507        }
 508
 509        return true;
 510}
 511
 512static int
 513smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
 514                     struct cifsInodeInfo *cinode)
 515{
 516        if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
 517                return SMB2_lease_break(0, tcon, cinode->lease_key,
 518                                        smb2_get_lease_state(cinode));
 519
 520        return SMB2_oplock_break(0, tcon, fid->persistent_fid,
 521                                 fid->volatile_fid,
 522                                 cinode->clientCanCacheRead ? 1 : 0);
 523}
 524
 525static int
 526smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
 527             struct kstatfs *buf)
 528{
 529        int rc;
 530        u64 persistent_fid, volatile_fid;
 531        __le16 srch_path = 0; /* Null - open root of share */
 532        u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 533
 534        rc = SMB2_open(xid, tcon, &srch_path, &persistent_fid, &volatile_fid,
 535                       FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, &oplock, NULL);
 536        if (rc)
 537                return rc;
 538        buf->f_type = SMB2_MAGIC_NUMBER;
 539        rc = SMB2_QFS_info(xid, tcon, persistent_fid, volatile_fid, buf);
 540        SMB2_close(xid, tcon, persistent_fid, volatile_fid);
 541        return rc;
 542}
 543
 544static bool
 545smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
 546{
 547        return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
 548               ob1->fid.volatile_fid == ob2->fid.volatile_fid;
 549}
 550
 551static int
 552smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 553               __u64 length, __u32 type, int lock, int unlock, bool wait)
 554{
 555        if (unlock && !lock)
 556                type = SMB2_LOCKFLAG_UNLOCK;
 557        return SMB2_lock(xid, tlink_tcon(cfile->tlink),
 558                         cfile->fid.persistent_fid, cfile->fid.volatile_fid,
 559                         current->tgid, length, offset, type, wait);
 560}
 561
 562static void
 563smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
 564{
 565        memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
 566}
 567
 568static void
 569smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
 570{
 571        memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
 572}
 573
 574static void
 575smb2_new_lease_key(struct cifs_fid *fid)
 576{
 577        get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
 578}
 579
 580struct smb_version_operations smb21_operations = {
 581        .compare_fids = smb2_compare_fids,
 582        .setup_request = smb2_setup_request,
 583        .setup_async_request = smb2_setup_async_request,
 584        .check_receive = smb2_check_receive,
 585        .add_credits = smb2_add_credits,
 586        .set_credits = smb2_set_credits,
 587        .get_credits_field = smb2_get_credits_field,
 588        .get_credits = smb2_get_credits,
 589        .get_next_mid = smb2_get_next_mid,
 590        .read_data_offset = smb2_read_data_offset,
 591        .read_data_length = smb2_read_data_length,
 592        .map_error = map_smb2_to_linux_error,
 593        .find_mid = smb2_find_mid,
 594        .check_message = smb2_check_message,
 595        .dump_detail = smb2_dump_detail,
 596        .clear_stats = smb2_clear_stats,
 597        .print_stats = smb2_print_stats,
 598        .is_oplock_break = smb2_is_valid_oplock_break,
 599        .need_neg = smb2_need_neg,
 600        .negotiate = smb2_negotiate,
 601        .negotiate_wsize = smb2_negotiate_wsize,
 602        .negotiate_rsize = smb2_negotiate_rsize,
 603        .sess_setup = SMB2_sess_setup,
 604        .logoff = SMB2_logoff,
 605        .tree_connect = SMB2_tcon,
 606        .tree_disconnect = SMB2_tdis,
 607        .is_path_accessible = smb2_is_path_accessible,
 608        .can_echo = smb2_can_echo,
 609        .echo = SMB2_echo,
 610        .query_path_info = smb2_query_path_info,
 611        .get_srv_inum = smb2_get_srv_inum,
 612        .query_file_info = smb2_query_file_info,
 613        .set_path_size = smb2_set_path_size,
 614        .set_file_size = smb2_set_file_size,
 615        .set_file_info = smb2_set_file_info,
 616        .build_path_to_root = smb2_build_path_to_root,
 617        .mkdir = smb2_mkdir,
 618        .mkdir_setinfo = smb2_mkdir_setinfo,
 619        .rmdir = smb2_rmdir,
 620        .unlink = smb2_unlink,
 621        .rename = smb2_rename_path,
 622        .create_hardlink = smb2_create_hardlink,
 623        .open = smb2_open_file,
 624        .set_fid = smb2_set_fid,
 625        .close = smb2_close_file,
 626        .flush = smb2_flush_file,
 627        .async_readv = smb2_async_readv,
 628        .async_writev = smb2_async_writev,
 629        .sync_read = smb2_sync_read,
 630        .sync_write = smb2_sync_write,
 631        .query_dir_first = smb2_query_dir_first,
 632        .query_dir_next = smb2_query_dir_next,
 633        .close_dir = smb2_close_dir,
 634        .calc_smb_size = smb2_calc_size,
 635        .is_status_pending = smb2_is_status_pending,
 636        .oplock_response = smb2_oplock_response,
 637        .queryfs = smb2_queryfs,
 638        .mand_lock = smb2_mand_lock,
 639        .mand_unlock_range = smb2_unlock_range,
 640        .push_mand_locks = smb2_push_mandatory_locks,
 641        .get_lease_key = smb2_get_lease_key,
 642        .set_lease_key = smb2_set_lease_key,
 643        .new_lease_key = smb2_new_lease_key,
 644};
 645
 646struct smb_version_values smb21_values = {
 647        .version_string = SMB21_VERSION_STRING,
 648        .protocol_id = SMB21_PROT_ID,
 649        .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
 650        .large_lock_type = 0,
 651        .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 652        .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 653        .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 654        .header_size = sizeof(struct smb2_hdr),
 655        .max_header_size = MAX_SMB2_HDR_SIZE,
 656        .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 657        .lock_cmd = SMB2_LOCK,
 658        .cap_unix = 0,
 659        .cap_nt_find = SMB2_NT_FIND,
 660        .cap_large_files = SMB2_LARGE_FILES,
 661};
 662
 663struct smb_version_values smb30_values = {
 664        .version_string = SMB30_VERSION_STRING,
 665        .protocol_id = SMB30_PROT_ID,
 666        .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
 667        .large_lock_type = 0,
 668        .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
 669        .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
 670        .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
 671        .header_size = sizeof(struct smb2_hdr),
 672        .max_header_size = MAX_SMB2_HDR_SIZE,
 673        .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
 674        .lock_cmd = SMB2_LOCK,
 675        .cap_unix = 0,
 676        .cap_nt_find = SMB2_NT_FIND,
 677        .cap_large_files = SMB2_LARGE_FILES,
 678};
 679
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