4 * Copyright (C) International Business Machines Corp., 2002,2008
8 * This library is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU Lesser General Public License as published
10 * by the Free Software Foundation; either version 2.1 of the License, or
11 * (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
16 * the GNU Lesser General Public License for more details.
23 #include <linux/in6.h>
24 #include <linux/slab.h>
25 #include <linux/mempool.h>
26 #include <linux/workqueue.h>
27 #include "cifs_fs_sb.h"
29 #include <crypto/internal/hash.h>
30 #include <linux/scatterlist.h>
31 #include <uapi/linux/cifs/cifs_mount.h>
34 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
36 #define SMB_PATH_MAX 260
38 #define RFC1001_PORT 139
41 * The sizes of various internal tables and strings
43 #define MAX_UID_INFO 16
44 #define MAX_SES_INFO 2
45 #define MAX_TCON_INFO 4
47 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
49 #define CIFS_MIN_RCV_POOL 4
51 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
53 * default attribute cache timeout (jiffies)
55 #define CIFS_DEF_ACTIMEO (1 * HZ)
58 * max attribute cache timeout (jiffies) - 2^30
60 #define CIFS_MAX_ACTIMEO (1 << 30)
63 * Max persistent and resilient handle timeout (milliseconds).
64 * Windows durable max was 960000 (16 minutes)
66 #define SMB3_MAX_HANDLE_TIMEOUT 960000
69 * MAX_REQ is the maximum number of requests that WE will send
70 * on one socket concurrently.
72 #define CIFS_MAX_REQ 32767
74 #define RFC1001_NAME_LEN 15
75 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
77 /* maximum length of ip addr as a string (including ipv6 and sctp) */
78 #define SERVER_NAME_LENGTH 80
79 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
81 /* echo interval in seconds */
82 #define SMB_ECHO_INTERVAL_MIN 1
83 #define SMB_ECHO_INTERVAL_MAX 600
84 #define SMB_ECHO_INTERVAL_DEFAULT 60
86 /* maximum number of PDUs in one compound */
87 #define MAX_COMPOUND 5
90 * Default number of credits to keep available for SMB3.
91 * This value is chosen somewhat arbitrarily. The Windows client
92 * defaults to 128 credits, the Windows server allows clients up to
93 * 512 credits (or 8K for later versions), and the NetApp server
94 * does not limit clients at all. Choose a high enough default value
95 * such that the client shouldn't limit performance, but allow mount
96 * to override (until you approach 64K, where we limit credits to 65000
97 * to reduce possibility of seeing more server credit overflow bugs.
99 #define SMB2_MAX_CREDITS_AVAILABLE 32000
103 #ifndef XATTR_DOS_ATTRIB
104 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
108 * CIFS vfs client Status information (based on what we know.)
111 /* associated with each tcp and smb session */
121 Unspecified = 0, /* not specified */
122 LANMAN, /* Legacy LANMAN auth */
123 NTLM, /* Legacy NTLM012 auth with NTLM hash */
124 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
125 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
126 Kerberos, /* Kerberos via SPNEGO */
134 /* crypto security descriptor definition */
136 struct shash_desc shash;
140 /* crypto hashing related structure/fields, not specific to a sec mech */
141 struct cifs_secmech {
142 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
143 struct crypto_shash *md5; /* md5 hash function */
144 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
145 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
146 struct crypto_shash *sha512; /* sha512 hash function */
147 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
148 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
149 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
150 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
151 struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
152 struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
153 struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
156 /* per smb session structure/fields */
157 struct ntlmssp_auth {
158 bool sesskey_per_smbsess; /* whether session key is per smb session */
159 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
160 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
161 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
162 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
170 struct cifs_sid osid;
171 struct cifs_sid gsid;
172 struct cifs_ntace *ntaces;
173 struct cifs_ace *aces;
177 *****************************************************************
178 * Except the CIFS PDUs themselves all the
179 * globally interesting structs should go here
180 *****************************************************************
184 * A smb_rqst represents a complete request to be issued to a server. It's
185 * formed by a kvec array, followed by an array of pages. Page data is assumed
186 * to start at the beginning of the first page.
189 struct kvec *rq_iov; /* array of kvecs */
190 unsigned int rq_nvec; /* number of kvecs in array */
191 struct page **rq_pages; /* pointer to array of page ptrs */
192 unsigned int rq_offset; /* the offset to the 1st page */
193 unsigned int rq_npages; /* number pages in array */
194 unsigned int rq_pagesz; /* page size to use */
195 unsigned int rq_tailsz; /* length of last page */
211 struct TCP_Server_Info;
215 struct dfs_info3_param;
219 struct cifs_readdata;
220 struct cifs_writedata;
221 struct cifs_io_parms;
222 struct cifs_search_info;
223 struct cifsInodeInfo;
224 struct cifs_open_parms;
227 struct smb_version_operations {
228 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
229 struct mid_q_entry *);
230 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
231 /* setup request: allocate mid, sign message */
232 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
233 struct TCP_Server_Info *,
235 /* setup async request: allocate mid, sign message */
236 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
238 /* check response: verify signature, map error */
239 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
241 void (*add_credits)(struct TCP_Server_Info *server,
242 const struct cifs_credits *credits,
244 void (*set_credits)(struct TCP_Server_Info *, const int);
245 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
246 unsigned int (*get_credits)(struct mid_q_entry *);
247 __u64 (*get_next_mid)(struct TCP_Server_Info *);
248 void (*revert_current_mid)(struct TCP_Server_Info *server,
249 const unsigned int val);
250 /* data offset from read response message */
251 unsigned int (*read_data_offset)(char *);
253 * Data length from read response message
254 * When in_remaining is true, the returned data length is in
255 * message field DataRemaining for out-of-band data read (e.g through
256 * Memory Registration RDMA write in SMBD).
257 * Otherwise, the returned data length is in message field DataLength.
259 unsigned int (*read_data_length)(char *, bool in_remaining);
260 /* map smb to linux error */
261 int (*map_error)(char *, bool);
262 /* find mid corresponding to the response message */
263 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
264 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
265 void (*clear_stats)(struct cifs_tcon *);
266 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
267 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
268 /* verify the message */
269 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
270 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
271 int (*handle_cancelled_mid)(char *, struct TCP_Server_Info *);
272 void (*downgrade_oplock)(struct TCP_Server_Info *server,
273 struct cifsInodeInfo *cinode, __u32 oplock,
274 unsigned int epoch, bool *purge_cache);
275 /* process transaction2 response */
276 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
278 /* check if we need to negotiate */
279 bool (*need_neg)(struct TCP_Server_Info *);
280 /* negotiate to the server */
281 int (*negotiate)(const unsigned int, struct cifs_ses *);
282 /* set negotiated write size */
283 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
284 /* set negotiated read size */
285 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
286 /* setup smb sessionn */
287 int (*sess_setup)(const unsigned int, struct cifs_ses *,
288 const struct nls_table *);
289 /* close smb session */
290 int (*logoff)(const unsigned int, struct cifs_ses *);
291 /* connect to a server share */
292 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
293 struct cifs_tcon *, const struct nls_table *);
294 /* close tree connecion */
295 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
296 /* get DFS referrals */
297 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
298 const char *, struct dfs_info3_param **,
299 unsigned int *, const struct nls_table *, int);
300 /* informational QFS call */
301 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *,
302 struct cifs_sb_info *);
303 /* check if a path is accessible or not */
304 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
305 struct cifs_sb_info *, const char *);
306 /* query path data from the server */
307 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
308 struct cifs_sb_info *, const char *,
309 FILE_ALL_INFO *, bool *, bool *);
310 /* query file data from the server */
311 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
312 struct cifs_fid *, FILE_ALL_INFO *);
313 /* get server index number */
314 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
315 struct cifs_sb_info *, const char *,
316 u64 *uniqueid, FILE_ALL_INFO *);
317 /* set size by path */
318 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
319 const char *, __u64, struct cifs_sb_info *, bool);
320 /* set size by file handle */
321 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
322 struct cifsFileInfo *, __u64, bool);
324 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
326 int (*set_compression)(const unsigned int, struct cifs_tcon *,
327 struct cifsFileInfo *);
328 /* check if we can send an echo or nor */
329 bool (*can_echo)(struct TCP_Server_Info *);
330 /* send echo request */
331 int (*echo)(struct TCP_Server_Info *);
332 /* create directory */
333 int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
334 umode_t mode, struct cifs_tcon *tcon,
335 const char *full_path,
336 struct cifs_sb_info *cifs_sb);
337 int (*mkdir)(const unsigned int xid, struct inode *inode, umode_t mode,
338 struct cifs_tcon *tcon, const char *name,
339 struct cifs_sb_info *sb);
340 /* set info on created directory */
341 void (*mkdir_setinfo)(struct inode *, const char *,
342 struct cifs_sb_info *, struct cifs_tcon *,
344 /* remove directory */
345 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
346 struct cifs_sb_info *);
348 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
349 struct cifs_sb_info *);
350 /* open, rename and delete file */
351 int (*rename_pending_delete)(const char *, struct dentry *,
353 /* send rename request */
354 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
355 const char *, struct cifs_sb_info *);
356 /* send create hardlink request */
357 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
358 const char *, const char *,
359 struct cifs_sb_info *);
360 /* query symlink target */
361 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
362 struct cifs_sb_info *, const char *,
364 /* open a file for non-posix mounts */
365 int (*open)(const unsigned int, struct cifs_open_parms *,
366 __u32 *, FILE_ALL_INFO *);
367 /* set fid protocol-specific info */
368 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
370 void (*close)(const unsigned int, struct cifs_tcon *,
372 /* close a file, returning file attributes and timestamps */
373 void (*close_getattr)(const unsigned int xid, struct cifs_tcon *tcon,
374 struct cifsFileInfo *pfile_info);
375 /* send a flush request to the server */
376 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
377 /* async read from the server */
378 int (*async_readv)(struct cifs_readdata *);
379 /* async write to the server */
380 int (*async_writev)(struct cifs_writedata *,
381 void (*release)(struct kref *));
382 /* sync read from the server */
383 int (*sync_read)(const unsigned int, struct cifs_fid *,
384 struct cifs_io_parms *, unsigned int *, char **,
386 /* sync write to the server */
387 int (*sync_write)(const unsigned int, struct cifs_fid *,
388 struct cifs_io_parms *, unsigned int *, struct kvec *,
390 /* open dir, start readdir */
391 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
392 const char *, struct cifs_sb_info *,
393 struct cifs_fid *, __u16,
394 struct cifs_search_info *);
395 /* continue readdir */
396 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
398 __u16, struct cifs_search_info *srch_inf);
400 int (*close_dir)(const unsigned int, struct cifs_tcon *,
402 /* calculate a size of SMB message */
403 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
404 /* check for STATUS_PENDING and process the response if yes */
405 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
406 /* check for STATUS_NETWORK_SESSION_EXPIRED */
407 bool (*is_session_expired)(char *);
408 /* send oplock break response */
409 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
410 struct cifsInodeInfo *);
411 /* query remote filesystem */
412 int (*queryfs)(const unsigned int, struct cifs_tcon *,
413 struct cifs_sb_info *, struct kstatfs *);
414 /* send mandatory brlock to the server */
415 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
416 __u64, __u32, int, int, bool);
417 /* unlock range of mandatory locks */
418 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
420 /* push brlocks from the cache to the server */
421 int (*push_mand_locks)(struct cifsFileInfo *);
422 /* get lease key of the inode */
423 void (*get_lease_key)(struct inode *, struct cifs_fid *);
424 /* set lease key of the inode */
425 void (*set_lease_key)(struct inode *, struct cifs_fid *);
426 /* generate new lease key */
427 void (*new_lease_key)(struct cifs_fid *);
428 int (*generate_signingkey)(struct cifs_ses *);
429 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *,
430 bool allocate_crypto);
431 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
432 struct cifsFileInfo *src_file);
433 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
434 struct cifsFileInfo *src_file, void __user *);
435 int (*notify)(const unsigned int xid, struct file *pfile,
437 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
438 struct cifs_sb_info *, const unsigned char *,
439 char *, unsigned int *);
440 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
441 struct cifs_sb_info *, const unsigned char *,
442 char *, unsigned int *);
443 /* if we can do cache read operations */
444 bool (*is_read_op)(__u32);
445 /* set oplock level for the inode */
446 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
448 /* create lease context buffer for CREATE request */
449 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
450 /* parse lease context buffer and return oplock/epoch info */
451 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
452 ssize_t (*copychunk_range)(const unsigned int,
453 struct cifsFileInfo *src_file,
454 struct cifsFileInfo *target_file,
455 u64 src_off, u64 len, u64 dest_off);
456 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
457 struct cifsFileInfo *target_file, u64 src_off, u64 len,
459 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
460 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
461 const unsigned char *, const unsigned char *, char *,
462 size_t, struct cifs_sb_info *);
463 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
464 const char *, const void *, const __u16,
465 const struct nls_table *, struct cifs_sb_info *);
466 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
467 const char *, u32 *);
468 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
469 const struct cifs_fid *, u32 *);
470 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
472 /* writepages retry size */
473 unsigned int (*wp_retry_size)(struct inode *);
474 /* get mtu credits */
475 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
476 unsigned int *, struct cifs_credits *);
477 /* adjust previously taken mtu credits to request size */
478 int (*adjust_credits)(struct TCP_Server_Info *server,
479 struct cifs_credits *credits,
480 const unsigned int payload_size);
481 /* check if we need to issue closedir */
482 bool (*dir_needs_close)(struct cifsFileInfo *);
483 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
485 /* init transform request - used for encryption for now */
486 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
487 struct smb_rqst *, struct smb_rqst *);
488 int (*is_transform_hdr)(void *buf);
489 int (*receive_transform)(struct TCP_Server_Info *,
490 struct mid_q_entry **, char **, int *);
491 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
493 int (*next_header)(char *);
494 /* ioctl passthrough for query_info */
495 int (*ioctl_query_info)(const unsigned int xid,
496 struct cifs_tcon *tcon,
497 struct cifs_sb_info *cifs_sb,
498 __le16 *path, int is_dir,
500 /* make unix special files (block, char, fifo, socket) */
501 int (*make_node)(unsigned int xid,
503 struct dentry *dentry,
504 struct cifs_tcon *tcon,
507 dev_t device_number);
508 /* version specific fiemap implementation */
509 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
510 struct fiemap_extent_info *, u64, u64);
511 /* version specific llseek implementation */
512 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
515 struct smb_version_values {
516 char *version_string;
518 __u32 req_capabilities;
519 __u32 large_lock_type;
520 __u32 exclusive_lock_type;
521 __u32 shared_lock_type;
522 __u32 unlock_lock_type;
523 size_t header_preamble_size;
525 size_t max_header_size;
526 size_t read_rsp_size;
528 unsigned int cap_unix;
529 unsigned int cap_nt_find;
530 unsigned int cap_large_files;
531 __u16 signing_enabled;
532 __u16 signing_required;
533 size_t create_lease_size;
536 #define HEADER_SIZE(server) (server->vals->header_size)
537 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
544 char *iocharset; /* local code page for mapping to and from Unicode */
545 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
546 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
554 enum securityEnum sectype; /* sectype requested via mnt opts */
555 bool sign; /* was signing requested via mnt opts? */
556 bool ignore_signature:1;
560 bool setuidfromacl:1;
566 bool no_psx_acl:1; /* set if posix acl support should be disabled */
568 bool backupuid_specified; /* mount option backupuid is specified */
569 bool backupgid_specified; /* mount option backupgid is specified */
570 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
571 bool server_ino:1; /* use inode numbers from server ie UniqueId */
573 bool strict_io:1; /* strict cache behavior */
576 bool remap:1; /* set to remap seven reserved chars in filenames */
577 bool sfu_remap:1; /* remap seven reserved chars ala SFU */
578 bool posix_paths:1; /* unset to not ask for posix pathnames. */
582 bool nullauth:1; /* attempt to authenticate with null user */
583 bool nocase:1; /* request case insensitive filenames */
584 bool nobrl:1; /* disable sending byte range locks to srv */
585 bool nohandlecache:1; /* disable caching dir handles if srvr probs */
586 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
587 bool seal:1; /* request transport encryption on share */
588 bool nodfs:1; /* Do not request DFS, even if available */
589 bool local_lease:1; /* check leases only on local system, not remote */
592 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
593 bool no_lease:1; /* disable requesting leases */
594 bool fsc:1; /* enable fscache */
595 bool mfsymlinks:1; /* use Minshall+French Symlinks */
597 bool rwpidforward:1; /* pid forward for read/write operations */
601 bool resilient:1; /* noresilient not required since not fored for CA */
605 bool use_client_guid:1;
606 /* reuse existing guid for multichannel */
607 u8 client_guid[SMB2_CLIENT_GUID_SIZE];
611 unsigned int min_offload;
612 bool sockopt_tcp_nodelay:1;
613 unsigned long actimeo; /* attribute cache timeout (jiffies) */
614 struct smb_version_operations *ops;
615 struct smb_version_values *vals;
617 struct sockaddr_storage dstaddr; /* destination address */
618 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
619 struct nls_table *local_nls;
620 unsigned int echo_interval; /* echo interval in secs */
621 __u64 snapshot_time; /* needed for timewarp tokens */
622 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
623 unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
624 unsigned int max_channels;
625 __u16 compression; /* compression algorithm 0xFFFF default 0=disabled */
626 bool rootfs:1; /* if it's a SMB root file system */
630 * CIFS superblock mount flags (mnt_cifs_flags) to consider when
631 * trying to reuse existing superblock for a new mount
633 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
634 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
635 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
636 CIFS_MOUNT_MAP_SFM_CHR | \
637 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
638 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
639 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
640 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
641 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
642 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
643 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
644 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
645 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
646 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
649 * Generic VFS superblock mount flags (s_flags) to consider when
650 * trying to reuse existing superblock for a new mount
652 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
653 SB_NODEV | SB_SYNCHRONOUS)
655 struct cifs_mnt_data {
656 struct cifs_sb_info *cifs_sb;
661 static inline unsigned int
662 get_rfc1002_length(void *buf)
664 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
668 inc_rfc1001_len(void *buf, int count)
670 be32_add_cpu((__be32 *)buf, count);
673 struct TCP_Server_Info {
674 struct list_head tcp_ses_list;
675 struct list_head smb_ses_list;
676 int srv_count; /* reference counter */
677 /* 15 character server name + 0x20 16th byte indicating type = srv */
678 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
679 struct smb_version_operations *ops;
680 struct smb_version_values *vals;
681 enum statusEnum tcpStatus; /* what we think the status is */
682 char *hostname; /* hostname portion of UNC string */
683 struct socket *ssocket;
684 struct sockaddr_storage dstaddr;
685 struct sockaddr_storage srcaddr; /* locally bind to this IP */
689 wait_queue_head_t response_q;
690 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
691 struct list_head pending_mid_q;
692 bool noblocksnd; /* use blocking sendmsg */
693 bool noautotune; /* do not autotune send buf sizes */
695 unsigned int credits; /* send no more requests at once */
696 unsigned int max_credits; /* can override large 32000 default at mnt */
697 unsigned int in_flight; /* number of requests on the wire to server */
698 unsigned int max_in_flight; /* max number of requests that were on wire */
699 spinlock_t req_lock; /* protect the two values above */
700 struct mutex srv_mutex;
701 struct task_struct *tsk;
702 char server_GUID[16];
704 bool sign; /* is signing enabled on this connection? */
705 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
706 bool session_estab; /* mark when very first sess is established */
707 int echo_credits; /* echo reserved slots */
708 int oplock_credits; /* oplock break reserved slots */
709 bool echoes:1; /* enable echoes */
710 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
711 u16 dialect; /* dialect index that server chose */
712 bool oplocks:1; /* enable oplocks */
713 unsigned int maxReq; /* Clients should submit no more */
714 /* than maxReq distinct unanswered SMBs to the server when using */
715 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
716 unsigned int maxBuf; /* maxBuf specifies the maximum */
717 /* message size the server can send or receive for non-raw SMBs */
718 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
719 /* when socket is setup (and during reconnect) before NegProt sent */
720 unsigned int max_rw; /* maxRw specifies the maximum */
721 /* message size the server can send or receive for */
722 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
723 unsigned int capabilities; /* selective disabling of caps by smb sess */
724 int timeAdj; /* Adjust for difference in server time zone in sec */
725 __u64 CurrentMid; /* multiplex id - rotating counter */
726 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
727 /* 16th byte of RFC1001 workstation name is always null */
728 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
729 __u32 sequence_number; /* for signing, protected by srv_mutex */
730 __u32 reconnect_instance; /* incremented on each reconnect */
731 struct session_key session_key;
732 unsigned long lstrp; /* when we got last response from this server */
733 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
734 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
735 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
736 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
737 char negflavor; /* NEGOTIATE response flavor */
738 /* extended security flavors that server supports */
739 bool sec_ntlmssp; /* supports NTLMSSP */
740 bool sec_kerberosu2u; /* supports U2U Kerberos */
741 bool sec_kerberos; /* supports plain Kerberos */
742 bool sec_mskerberos; /* supports legacy MS Kerberos */
743 bool large_buf; /* is current buffer large? */
744 /* use SMBD connection instead of socket */
746 /* point to the SMBD connection if RDMA is used instead of socket */
747 struct smbd_connection *smbd_conn;
748 struct delayed_work echo; /* echo ping workqueue job */
749 char *smallbuf; /* pointer to current "small" buffer */
750 char *bigbuf; /* pointer to current "big" buffer */
751 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
752 unsigned int pdu_size;
753 unsigned int total_read; /* total amount of data read in this pass */
754 atomic_t in_send; /* requests trying to send */
755 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
756 #ifdef CONFIG_CIFS_FSCACHE
757 struct fscache_cookie *fscache; /* client index cache cookie */
759 #ifdef CONFIG_CIFS_STATS2
760 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
761 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
762 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
763 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
764 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
766 unsigned int max_read;
767 unsigned int max_write;
768 unsigned int min_offload;
769 __le16 compress_algorithm;
771 /* save initital negprot hash */
772 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
773 bool posix_ext_supported;
774 struct delayed_work reconnect; /* reconnect workqueue job */
775 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
776 unsigned long echo_interval;
779 * Number of targets available for reconnect. The more targets
780 * the more tasks have to wait to let the demultiplex thread
784 bool noblockcnt; /* use non-blocking connect() */
785 bool is_channel; /* if a session channel */
788 struct cifs_credits {
790 unsigned int instance;
793 static inline unsigned int
794 in_flight(struct TCP_Server_Info *server)
797 spin_lock(&server->req_lock);
798 num = server->in_flight;
799 spin_unlock(&server->req_lock);
804 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
807 spin_lock(&server->req_lock);
809 spin_unlock(&server->req_lock);
810 return num >= num_credits;
814 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
817 server->ops->add_credits(server, credits, optype);
821 add_credits_and_wake_if(struct TCP_Server_Info *server,
822 const struct cifs_credits *credits, const int optype)
824 if (credits->value) {
825 server->ops->add_credits(server, credits, optype);
826 wake_up(&server->request_q);
831 set_credits(struct TCP_Server_Info *server, const int val)
833 server->ops->set_credits(server, val);
837 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
838 const unsigned int payload_size)
840 return server->ops->adjust_credits ?
841 server->ops->adjust_credits(server, credits, payload_size) : 0;
845 get_next_mid64(struct TCP_Server_Info *server)
847 return cpu_to_le64(server->ops->get_next_mid(server));
851 get_next_mid(struct TCP_Server_Info *server)
853 __u16 mid = server->ops->get_next_mid(server);
855 * The value in the SMB header should be little endian for easy
856 * on-the-wire decoding.
858 return cpu_to_le16(mid);
862 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
864 if (server->ops->revert_current_mid)
865 server->ops->revert_current_mid(server, val);
869 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
870 const struct smb2_sync_hdr *shdr)
872 unsigned int num = le16_to_cpu(shdr->CreditCharge);
874 return revert_current_mid(server, num > 0 ? num : 1);
878 get_mid(const struct smb_hdr *smb)
880 return le16_to_cpu(smb->Mid);
884 compare_mid(__u16 mid, const struct smb_hdr *smb)
886 return mid == le16_to_cpu(smb->Mid);
890 * When the server supports very large reads and writes via POSIX extensions,
891 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
892 * including the RFC1001 length.
894 * Note that this might make for "interesting" allocation problems during
895 * writeback however as we have to allocate an array of pointers for the
896 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
898 * For reads, there is a similar problem as we need to allocate an array
899 * of kvecs to handle the receive, though that should only need to be done
902 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
903 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
906 * When the server doesn't allow large posix writes, only allow a rsize/wsize
907 * of 2^17-1 minus the size of the call header. That allows for a read or
908 * write up to the maximum size described by RFC1002.
910 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
911 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
914 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
915 * pages in a single call. With PAGE_SIZE == 4k, this means we can fill
916 * a single wsize request with a single call.
918 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
919 #define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024)
922 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
923 * those values when posix extensions aren't in force. In actuality here, we
924 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
925 * to be ok with the extra byte even though Windows doesn't send writes that
930 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
932 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
933 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
936 * Macros to allow the TCP_Server_Info->net field and related code to drop out
937 * when CONFIG_NET_NS isn't set.
942 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
947 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
954 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
959 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
965 struct cifs_server_iface {
967 unsigned int rdma_capable : 1;
968 unsigned int rss_capable : 1;
969 struct sockaddr_storage sockaddr;
973 struct TCP_Server_Info *server;
974 __u8 signkey[SMB3_SIGN_KEY_SIZE];
978 * Session structure. One of these for each uid session with a particular host
981 struct list_head smb_ses_list;
982 struct list_head tcon_list;
983 struct cifs_tcon *tcon_ipc;
984 struct mutex session_mutex;
985 struct TCP_Server_Info *server; /* pointer to server info */
986 int ses_count; /* reference counter */
987 enum statusEnum status;
988 unsigned overrideSecFlg; /* if non-zero override global sec flags */
989 char *serverOS; /* name of operating system underlying server */
990 char *serverNOS; /* name of network operating system of server */
991 char *serverDomain; /* security realm of server */
992 __u64 Suid; /* remote smb uid */
993 kuid_t linux_uid; /* overriding owner of files on the mount */
994 kuid_t cred_uid; /* owner of credentials */
995 unsigned int capabilities;
996 char serverName[SERVER_NAME_LEN_WITH_NULL];
997 char *user_name; /* must not be null except during init of sess
998 and after mount option parsing we fill it */
1001 struct session_key auth_key;
1002 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
1003 enum securityEnum sectype; /* what security flavor was specified? */
1004 bool sign; /* is signing required? */
1005 bool need_reconnect:1; /* connection reset, uid now invalid */
1007 bool binding:1; /* are we binding the session? */
1008 __u16 session_flags;
1009 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
1010 __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
1011 __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
1012 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
1014 __u8 binding_preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
1017 * Network interfaces available on the server this session is
1020 * Other channels can be opened by connecting and binding this
1021 * session to interfaces from this list.
1023 * iface_lock should be taken when accessing any of these fields
1025 spinlock_t iface_lock;
1026 struct cifs_server_iface *iface_list;
1028 unsigned long iface_last_update; /* jiffies */
1030 #define CIFS_MAX_CHANNELS 16
1031 struct cifs_chan chans[CIFS_MAX_CHANNELS];
1034 atomic_t chan_seq; /* round robin state */
1038 * When binding a new channel, we need to access the channel which isn't fully
1039 * established yet (one past the established count)
1043 struct cifs_chan *cifs_ses_binding_channel(struct cifs_ses *ses)
1046 return &ses->chans[ses->chan_count];
1052 struct TCP_Server_Info *cifs_ses_server(struct cifs_ses *ses)
1055 return ses->chans[ses->chan_count].server;
1061 cap_unix(struct cifs_ses *ses)
1063 return ses->server->vals->cap_unix & ses->capabilities;
1067 bool is_valid:1; /* Do we have a useable root fid */
1068 bool file_all_info_is_valid:1;
1070 struct kref refcount;
1071 struct cifs_fid *fid;
1072 struct mutex fid_mutex;
1073 struct cifs_tcon *tcon;
1074 struct work_struct lease_break;
1075 struct smb2_file_all_info file_all_info;
1079 * there is one of these for each connection to a resource on a particular
1083 struct list_head tcon_list;
1085 struct list_head rlist; /* reconnect list */
1086 atomic_t num_local_opens; /* num of all opens including disconnected */
1087 atomic_t num_remote_opens; /* num of all network opens on server */
1088 struct list_head openFileList;
1089 spinlock_t open_file_lock; /* protects list above */
1090 struct cifs_ses *ses; /* pointer to session associated with */
1091 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
1092 char *nativeFileSystem;
1093 char *password; /* for share-level security */
1094 __u32 tid; /* The 4 byte tree id */
1095 __u16 Flags; /* optional support bits */
1096 enum statusEnum tidStatus;
1097 atomic_t num_smbs_sent;
1100 atomic_t num_writes;
1102 atomic_t num_flushes;
1103 atomic_t num_oplock_brks;
1105 atomic_t num_closes;
1106 atomic_t num_deletes;
1107 atomic_t num_mkdirs;
1108 atomic_t num_posixopens;
1109 atomic_t num_posixmkdirs;
1110 atomic_t num_rmdirs;
1111 atomic_t num_renames;
1112 atomic_t num_t2renames;
1113 atomic_t num_ffirst;
1115 atomic_t num_fclose;
1116 atomic_t num_hardlinks;
1117 atomic_t num_symlinks;
1119 atomic_t num_acl_get;
1120 atomic_t num_acl_set;
1123 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
1124 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
1128 __u64 bytes_written;
1129 spinlock_t stat_lock; /* protects the two fields above */
1130 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
1131 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1132 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
1133 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
1134 bool pipe:1; /* set if connection to pipe share */
1135 bool print:1; /* set if connection to printer share */
1138 bool nohandlecache:1; /* if strange server resource prob can turn off */
1139 bool seal:1; /* transport encryption for this mounted share */
1140 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1141 for this mount even if server would support */
1142 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1143 bool local_lease:1; /* check leases (only) on local system not remote */
1144 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1145 bool broken_sparse_sup; /* if server or share does not support sparse */
1146 bool need_reconnect:1; /* connection reset, tid now invalid */
1147 bool need_reopen_files:1; /* need to reopen tcon file handles */
1148 bool use_resilient:1; /* use resilient instead of durable handles */
1149 bool use_persistent:1; /* use persistent instead of durable handles */
1150 bool no_lease:1; /* Do not request leases on files or directories */
1151 __le32 capabilities;
1153 __u32 maximal_access;
1154 __u32 vol_serial_number;
1155 __le64 vol_create_time;
1156 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1157 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
1158 __u32 ss_flags; /* sector size flags */
1159 __u32 perf_sector_size; /* best sector size for perf */
1161 __u32 max_bytes_chunk;
1162 __u32 max_bytes_copy;
1163 #ifdef CONFIG_CIFS_FSCACHE
1164 u64 resource_id; /* server resource id */
1165 struct fscache_cookie *fscache; /* cookie for share */
1167 struct list_head pending_opens; /* list of incomplete opens */
1168 struct cached_fid crfid; /* Cached root fid */
1169 /* BB add field for back pointer to sb struct(s)? */
1170 #ifdef CONFIG_CIFS_DFS_UPCALL
1173 struct list_head ulist; /* cache update list */
1178 * This is a refcounted and timestamped container for a tcon pointer. The
1179 * container holds a tcon reference. It is considered safe to free one of
1180 * these when the tl_count goes to 0. The tl_time is the time of the last
1181 * "get" on the container.
1184 struct rb_node tl_rbnode;
1186 unsigned long tl_flags;
1187 #define TCON_LINK_MASTER 0
1188 #define TCON_LINK_PENDING 1
1189 #define TCON_LINK_IN_TREE 2
1190 unsigned long tl_time;
1192 struct cifs_tcon *tl_tcon;
1195 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1196 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1198 static inline struct cifs_tcon *
1199 tlink_tcon(struct tcon_link *tlink)
1201 return tlink->tl_tcon;
1204 static inline struct tcon_link *
1205 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1207 return cifs_sb->master_tlink;
1210 extern void cifs_put_tlink(struct tcon_link *tlink);
1212 static inline struct tcon_link *
1213 cifs_get_tlink(struct tcon_link *tlink)
1215 if (tlink && !IS_ERR(tlink))
1216 atomic_inc(&tlink->tl_count);
1220 /* This function is always expected to succeed */
1221 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1223 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1225 struct cifs_pending_open {
1226 struct list_head olist;
1227 struct tcon_link *tlink;
1233 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1234 * This is used to track byte stream locks on the file
1236 struct cifsLockInfo {
1237 struct list_head llist; /* pointer to next cifsLockInfo */
1238 struct list_head blist; /* pointer to locks blocked on this */
1239 wait_queue_head_t block_q;
1248 * One of these for each open instance of a file
1250 struct cifs_search_info {
1251 loff_t index_of_last_entry;
1252 __u16 entries_in_buffer;
1255 char *ntwrk_buf_start;
1256 char *srch_entries_start;
1258 const char *presume_name;
1259 unsigned int resume_name_len;
1263 bool smallBuf:1; /* so we know which buf_release function to call */
1266 #define ACL_NO_MODE ((umode_t)(-1))
1267 struct cifs_open_parms {
1268 struct cifs_tcon *tcon;
1269 struct cifs_sb_info *cifs_sb;
1274 struct cifs_fid *fid;
1281 __u64 persistent_fid; /* persist file id for smb2 */
1282 __u64 volatile_fid; /* volatile file id for smb2 */
1283 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1284 __u8 create_guid[16];
1286 struct cifs_pending_open *pending_open;
1288 #ifdef CONFIG_CIFS_DEBUG2
1290 #endif /* CIFS_DEBUG2 */
1294 struct cifs_fid_locks {
1295 struct list_head llist;
1296 struct cifsFileInfo *cfile; /* fid that owns locks */
1297 struct list_head locks; /* locks held by fid above */
1300 struct cifsFileInfo {
1301 /* following two lists are protected by tcon->open_file_lock */
1302 struct list_head tlist; /* pointer to next fid owned by tcon */
1303 struct list_head flist; /* next fid (file instance) for this inode */
1304 /* lock list below protected by cifsi->lock_sem */
1305 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1306 kuid_t uid; /* allows finding which FileInfo structure */
1307 __u32 pid; /* process id who opened file */
1308 struct cifs_fid fid; /* file id from remote */
1309 struct list_head rlist; /* reconnect list */
1310 /* BB add lock scope info here if needed */ ;
1311 /* lock scope id (0 if none) */
1312 struct dentry *dentry;
1313 struct tcon_link *tlink;
1314 unsigned int f_flags;
1315 bool invalidHandle:1; /* file closed via session abend */
1317 bool oplock_break_cancelled:1;
1318 unsigned int oplock_epoch; /* epoch from the lease break */
1319 __u32 oplock_level; /* oplock/lease level from the lease break */
1321 spinlock_t file_info_lock; /* protects four flag/count fields above */
1322 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1323 struct cifs_search_info srch_inf;
1324 struct work_struct oplock_break; /* work for oplock breaks */
1325 struct work_struct put; /* work for the final part of _put */
1328 struct cifs_io_parms {
1330 __u64 persistent_fid; /* persist file id for smb2 */
1331 __u64 volatile_fid; /* volatile file id for smb2 */
1334 unsigned int length;
1335 struct cifs_tcon *tcon;
1338 struct cifs_aio_ctx {
1339 struct kref refcount;
1340 struct list_head list;
1341 struct mutex aio_mutex;
1342 struct completion done;
1343 struct iov_iter iter;
1345 struct cifsFileInfo *cfile;
1348 unsigned int npages;
1351 unsigned int total_len;
1354 * Indicates if this aio_ctx is for direct_io,
1355 * If yes, iter is a copy of the user passed iov_iter
1360 struct cifs_readdata;
1362 /* asynchronous read support */
1363 struct cifs_readdata {
1364 struct kref refcount;
1365 struct list_head list;
1366 struct completion done;
1367 struct cifsFileInfo *cfile;
1368 struct address_space *mapping;
1369 struct cifs_aio_ctx *ctx;
1372 unsigned int got_bytes;
1375 struct work_struct work;
1376 int (*read_into_pages)(struct TCP_Server_Info *server,
1377 struct cifs_readdata *rdata,
1379 int (*copy_into_pages)(struct TCP_Server_Info *server,
1380 struct cifs_readdata *rdata,
1381 struct iov_iter *iter);
1383 #ifdef CONFIG_CIFS_SMB_DIRECT
1386 unsigned int pagesz;
1387 unsigned int page_offset;
1388 unsigned int tailsz;
1389 struct cifs_credits credits;
1390 unsigned int nr_pages;
1391 struct page **pages;
1394 struct cifs_writedata;
1396 /* asynchronous write support */
1397 struct cifs_writedata {
1398 struct kref refcount;
1399 struct list_head list;
1400 struct completion done;
1401 enum writeback_sync_modes sync_mode;
1402 struct work_struct work;
1403 struct cifsFileInfo *cfile;
1404 struct cifs_aio_ctx *ctx;
1409 #ifdef CONFIG_CIFS_SMB_DIRECT
1412 unsigned int pagesz;
1413 unsigned int page_offset;
1414 unsigned int tailsz;
1415 struct cifs_credits credits;
1416 unsigned int nr_pages;
1417 struct page **pages;
1421 * Take a reference on the file private data. Must be called with
1422 * cfile->file_info_lock held.
1425 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1430 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1431 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr,
1433 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1435 #define CIFS_CACHE_READ_FLG 1
1436 #define CIFS_CACHE_HANDLE_FLG 2
1437 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1438 #define CIFS_CACHE_WRITE_FLG 4
1439 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1440 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1442 #define CIFS_CACHE_READ(cinode) ((cinode->oplock & CIFS_CACHE_READ_FLG) || (CIFS_SB(cinode->vfs_inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE))
1443 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1444 #define CIFS_CACHE_WRITE(cinode) ((cinode->oplock & CIFS_CACHE_WRITE_FLG) || (CIFS_SB(cinode->vfs_inode.i_sb)->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE))
1447 * One of these for each file inode
1450 struct cifsInodeInfo {
1451 bool can_cache_brlcks;
1452 struct list_head llist; /* locks helb by this inode */
1454 * NOTE: Some code paths call down_read(lock_sem) twice, so
1455 * we must always use use cifs_down_write() instead of down_write()
1456 * for this semaphore to avoid deadlocks.
1458 struct rw_semaphore lock_sem; /* protect the fields above */
1459 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1460 struct list_head openFileList;
1461 spinlock_t open_file_lock; /* protects openFileList */
1462 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1463 unsigned int oplock; /* oplock/lease level we have */
1464 unsigned int epoch; /* used to track lease state changes */
1465 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1466 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1467 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */
1468 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1469 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1470 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1471 unsigned long flags;
1472 spinlock_t writers_lock;
1473 unsigned int writers; /* Number of writers on this inode */
1474 unsigned long time; /* jiffies of last update of inode */
1475 u64 server_eof; /* current file size on server -- protected by i_lock */
1476 u64 uniqueid; /* server inode number */
1477 u64 createtime; /* creation time on server */
1478 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1479 #ifdef CONFIG_CIFS_FSCACHE
1480 struct fscache_cookie *fscache;
1482 struct inode vfs_inode;
1485 static inline struct cifsInodeInfo *
1486 CIFS_I(struct inode *inode)
1488 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1491 static inline struct cifs_sb_info *
1492 CIFS_SB(struct super_block *sb)
1494 return sb->s_fs_info;
1497 static inline struct cifs_sb_info *
1498 CIFS_FILE_SB(struct file *file)
1500 return CIFS_SB(file_inode(file)->i_sb);
1503 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1505 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1512 convert_delimiter(char *path, char delim)
1514 char old_delim, *pos;
1522 while ((pos = strchr(pos, old_delim)))
1526 #define cifs_stats_inc atomic_inc
1528 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1532 spin_lock(&tcon->stat_lock);
1533 tcon->bytes_written += bytes;
1534 spin_unlock(&tcon->stat_lock);
1538 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1541 spin_lock(&tcon->stat_lock);
1542 tcon->bytes_read += bytes;
1543 spin_unlock(&tcon->stat_lock);
1548 * This is the prototype for the mid receive function. This function is for
1549 * receiving the rest of the SMB frame, starting with the WordCount (which is
1550 * just after the MID in struct smb_hdr). Note:
1552 * - This will be called by cifsd, with no locks held.
1553 * - The mid will still be on the pending_mid_q.
1554 * - mid->resp_buf will point to the current buffer.
1556 * Returns zero on a successful receive, or an error. The receive state in
1557 * the TCP_Server_Info will also be updated.
1559 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1560 struct mid_q_entry *mid);
1563 * This is the prototype for the mid callback function. This is called once the
1564 * mid has been received off of the socket. When creating one, take special
1565 * care to avoid deadlocks. Things to bear in mind:
1567 * - it will be called by cifsd, with no locks held
1568 * - the mid will be removed from any lists
1570 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1573 * This is the protopyte for mid handle function. This is called once the mid
1574 * has been recognized after decryption of the message.
1576 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1577 struct mid_q_entry *mid);
1579 /* one of these for every pending CIFS request to the server */
1580 struct mid_q_entry {
1581 struct list_head qhead; /* mids waiting on reply from this server */
1582 struct kref refcount;
1583 struct TCP_Server_Info *server; /* server corresponding to this mid */
1584 __u64 mid; /* multiplex id */
1585 __u16 credits; /* number of credits consumed by this mid */
1586 __u16 credits_received; /* number of credits from the response */
1587 __u32 pid; /* process id */
1588 __u32 sequence_number; /* for CIFS signing */
1589 unsigned long when_alloc; /* when mid was created */
1590 #ifdef CONFIG_CIFS_STATS2
1591 unsigned long when_sent; /* time when smb send finished */
1592 unsigned long when_received; /* when demux complete (taken off wire) */
1594 mid_receive_t *receive; /* call receive callback */
1595 mid_callback_t *callback; /* call completion callback */
1596 mid_handle_t *handle; /* call handle mid callback */
1597 void *callback_data; /* general purpose pointer for callback */
1598 struct task_struct *creator;
1599 void *resp_buf; /* pointer to received SMB header */
1600 unsigned int resp_buf_size;
1601 int mid_state; /* wish this were enum but can not pass to wait_event */
1602 unsigned int mid_flags;
1603 __le16 command; /* smb command code */
1604 unsigned int optype; /* operation type */
1605 bool large_buf:1; /* if valid response, is pointer to large buf */
1606 bool multiRsp:1; /* multiple trans2 responses for one request */
1607 bool multiEnd:1; /* both received */
1608 bool decrypted:1; /* decrypted entry */
1611 struct close_cancelled_open {
1612 struct cifs_fid fid;
1613 struct cifs_tcon *tcon;
1614 struct work_struct work;
1619 /* Make code in transport.c a little cleaner by moving
1620 update of optional stats into function below */
1621 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1623 atomic_inc(&server->in_send);
1626 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1628 atomic_dec(&server->in_send);
1631 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1633 atomic_inc(&server->num_waiters);
1636 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1638 atomic_dec(&server->num_waiters);
1641 #ifdef CONFIG_CIFS_STATS2
1642 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1644 mid->when_sent = jiffies;
1647 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1652 /* for pending dnotify requests */
1653 struct dir_notify_req {
1654 struct list_head lhead;
1661 __u32 filter; /* CompletionFilter (for multishot) */
1666 struct dfs_info3_param {
1667 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1677 * common struct for holding inode info when searching for or updating an
1678 * inode with new info
1681 #define CIFS_FATTR_DFS_REFERRAL 0x1
1682 #define CIFS_FATTR_DELETE_PENDING 0x2
1683 #define CIFS_FATTR_NEED_REVAL 0x4
1684 #define CIFS_FATTR_INO_COLLISION 0x8
1685 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1686 #define CIFS_FATTR_FAKE_ROOT_INO 0x20
1699 unsigned int cf_nlink;
1700 unsigned int cf_dtype;
1701 struct timespec64 cf_atime;
1702 struct timespec64 cf_mtime;
1703 struct timespec64 cf_ctime;
1707 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1710 kfree(param->path_name);
1711 kfree(param->node_name);
1715 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1716 int number_of_items)
1719 if ((number_of_items == 0) || (param == NULL))
1721 for (i = 0; i < number_of_items; i++) {
1722 kfree(param[i].path_name);
1723 kfree(param[i].node_name);
1728 static inline bool is_interrupt_error(int error)
1733 case -ERESTARTNOHAND:
1734 case -ERESTARTNOINTR:
1740 static inline bool is_retryable_error(int error)
1742 if (is_interrupt_error(error) || error == -EAGAIN)
1748 /* cifs_get_writable_file() flags */
1749 #define FIND_WR_ANY 0
1750 #define FIND_WR_FSUID_ONLY 1
1751 #define FIND_WR_WITH_DELETE 2
1754 #define MID_REQUEST_ALLOCATED 1
1755 #define MID_REQUEST_SUBMITTED 2
1756 #define MID_RESPONSE_RECEIVED 4
1757 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1758 #define MID_RESPONSE_MALFORMED 0x10
1759 #define MID_SHUTDOWN 0x20
1762 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1763 #define MID_DELETED 2 /* Mid has been dequeued/deleted */
1765 /* Types of response buffer returned from SendReceive2 */
1766 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1767 #define CIFS_SMALL_BUFFER 1
1768 #define CIFS_LARGE_BUFFER 2
1769 #define CIFS_IOVEC 4 /* array of response buffers */
1771 /* Type of Request to SendReceive2 */
1772 #define CIFS_BLOCKING_OP 1 /* operation can block */
1773 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */
1774 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1775 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1776 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1777 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */
1779 /* Type of request operation */
1780 #define CIFS_ECHO_OP 0x080 /* echo request */
1781 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1782 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1783 #define CIFS_OP_MASK 0x0380 /* mask request type */
1785 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1786 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1787 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */
1789 /* Security Flags: indicate type of session setup needed */
1790 #define CIFSSEC_MAY_SIGN 0x00001
1791 #define CIFSSEC_MAY_NTLM 0x00002
1792 #define CIFSSEC_MAY_NTLMV2 0x00004
1793 #define CIFSSEC_MAY_KRB5 0x00008
1794 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1795 #define CIFSSEC_MAY_LANMAN 0x00010
1796 #define CIFSSEC_MAY_PLNTXT 0x00020
1798 #define CIFSSEC_MAY_LANMAN 0
1799 #define CIFSSEC_MAY_PLNTXT 0
1800 #endif /* weak passwords */
1801 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1802 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1804 #define CIFSSEC_MUST_SIGN 0x01001
1805 /* note that only one of the following can be set so the
1806 result of setting MUST flags more than once will be to
1807 require use of the stronger protocol */
1808 #define CIFSSEC_MUST_NTLM 0x02002
1809 #define CIFSSEC_MUST_NTLMV2 0x04004
1810 #define CIFSSEC_MUST_KRB5 0x08008
1811 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1812 #define CIFSSEC_MUST_LANMAN 0x10010
1813 #define CIFSSEC_MUST_PLNTXT 0x20020
1814 #ifdef CONFIG_CIFS_UPCALL
1815 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1817 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1819 #else /* do not allow weak pw hash */
1820 #define CIFSSEC_MUST_LANMAN 0
1821 #define CIFSSEC_MUST_PLNTXT 0
1822 #ifdef CONFIG_CIFS_UPCALL
1823 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1825 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1827 #endif /* WEAK_PW_HASH */
1828 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1829 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1831 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1832 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1833 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1835 *****************************************************************
1836 * All constants go here
1837 *****************************************************************
1840 #define UID_HASH (16)
1843 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1844 * following to be declared.
1847 /****************************************************************************
1848 * Locking notes. All updates to global variables and lists should be
1849 * protected by spinlocks or semaphores.
1853 * GlobalMid_Lock protects:
1854 * list operations on pending_mid_q and oplockQ
1855 * updates to XID counters, multiplex id and SMB sequence numbers
1856 * list operations on global DnotifyReqList
1857 * tcp_ses_lock protects:
1858 * list operations on tcp and SMB session lists
1859 * tcon->open_file_lock protects the list of open files hanging off the tcon
1860 * inode->open_file_lock protects the openFileList hanging off the inode
1861 * cfile->file_info_lock protects counters and fields in cifs file struct
1862 * f_owner.lock protects certain per file struct operations
1863 * mapping->page_lock protects certain per page operations
1865 * Note that the cifs_tcon.open_file_lock should be taken before
1866 * not after the cifsInodeInfo.open_file_lock
1870 * sesSem operations on smb session
1871 * tconSem operations on tree connection
1872 * fh_sem file handle reconnection operations
1874 ****************************************************************************/
1876 #ifdef DECLARE_GLOBALS_HERE
1877 #define GLOBAL_EXTERN
1879 #define GLOBAL_EXTERN extern
1883 * the list of TCP_Server_Info structures, ie each of the sockets
1884 * connecting our client to a distinct server (ip address), is
1885 * chained together by cifs_tcp_ses_list. The list of all our SMB
1886 * sessions (and from that the tree connections) can be found
1887 * by iterating over cifs_tcp_ses_list
1889 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1892 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1893 * tcp session, and the list of tcon's per smb session. It also protects
1894 * the reference counters for the server, smb session, and tcon. Finally,
1895 * changes to the tcon->tidStatus should be done while holding this lock.
1896 * generally the locks should be taken in order tcp_ses_lock before
1897 * tcon->open_file_lock and that before file->file_info_lock since the
1898 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1900 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1902 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1903 /* Outstanding dir notify requests */
1904 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1905 /* DirNotify response queue */
1906 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1907 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1910 * Global transaction id (XID) information
1912 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1913 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1914 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1915 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1916 /* on midQ entries */
1918 * Global counters, updated atomically
1920 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1921 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1922 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1923 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1924 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1926 /* Various Debug counters */
1927 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1928 #ifdef CONFIG_CIFS_STATS2
1929 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1930 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1931 extern unsigned int slow_rsp_threshold; /* number of secs before logging */
1933 GLOBAL_EXTERN atomic_t smBufAllocCount;
1934 GLOBAL_EXTERN atomic_t midCount;
1937 extern bool enable_oplocks; /* enable or disable oplocks */
1938 extern bool lookupCacheEnabled;
1939 extern unsigned int global_secflags; /* if on, session setup sent
1940 with more secure ntlmssp2 challenge/resp */
1941 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1942 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1943 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
1944 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1945 extern unsigned int cifs_min_small; /* min size of small buf pool */
1946 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
1947 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
1949 GLOBAL_EXTERN struct rb_root uidtree;
1950 GLOBAL_EXTERN struct rb_root gidtree;
1951 GLOBAL_EXTERN spinlock_t siduidlock;
1952 GLOBAL_EXTERN spinlock_t sidgidlock;
1953 GLOBAL_EXTERN struct rb_root siduidtree;
1954 GLOBAL_EXTERN struct rb_root sidgidtree;
1955 GLOBAL_EXTERN spinlock_t uidsidlock;
1956 GLOBAL_EXTERN spinlock_t gidsidlock;
1958 void cifs_oplock_break(struct work_struct *work);
1959 void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
1961 extern const struct slow_work_ops cifs_oplock_break_ops;
1962 extern struct workqueue_struct *cifsiod_wq;
1963 extern struct workqueue_struct *decrypt_wq;
1964 extern struct workqueue_struct *fileinfo_put_wq;
1965 extern struct workqueue_struct *cifsoplockd_wq;
1966 extern __u32 cifs_lock_secret;
1968 extern mempool_t *cifs_mid_poolp;
1970 /* Operations for different SMB versions */
1971 #define SMB1_VERSION_STRING "1.0"
1972 extern struct smb_version_operations smb1_operations;
1973 extern struct smb_version_values smb1_values;
1974 #define SMB20_VERSION_STRING "2.0"
1975 extern struct smb_version_operations smb20_operations;
1976 extern struct smb_version_values smb20_values;
1977 #define SMB21_VERSION_STRING "2.1"
1978 extern struct smb_version_operations smb21_operations;
1979 extern struct smb_version_values smb21_values;
1980 #define SMBDEFAULT_VERSION_STRING "default"
1981 extern struct smb_version_values smbdefault_values;
1982 #define SMB3ANY_VERSION_STRING "3"
1983 extern struct smb_version_values smb3any_values;
1984 #define SMB30_VERSION_STRING "3.0"
1985 extern struct smb_version_operations smb30_operations;
1986 extern struct smb_version_values smb30_values;
1987 #define SMB302_VERSION_STRING "3.02"
1988 #define ALT_SMB302_VERSION_STRING "3.0.2"
1989 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1990 extern struct smb_version_values smb302_values;
1991 #define SMB311_VERSION_STRING "3.1.1"
1992 #define ALT_SMB311_VERSION_STRING "3.11"
1993 extern struct smb_version_operations smb311_operations;
1994 extern struct smb_version_values smb311_values;
1996 static inline bool is_smb1_server(struct TCP_Server_Info *server)
1998 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
2001 #endif /* _CIFS_GLOB_H */