4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 * Jeremy Allison (jra@samba.org)
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 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
431 struct cifsFileInfo *src_file);
432 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
433 struct cifsFileInfo *src_file, void __user *);
434 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
435 struct cifs_sb_info *, const unsigned char *,
436 char *, unsigned int *);
437 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
438 struct cifs_sb_info *, const unsigned char *,
439 char *, unsigned int *);
440 /* if we can do cache read operations */
441 bool (*is_read_op)(__u32);
442 /* set oplock level for the inode */
443 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
445 /* create lease context buffer for CREATE request */
446 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
447 /* parse lease context buffer and return oplock/epoch info */
448 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
449 ssize_t (*copychunk_range)(const unsigned int,
450 struct cifsFileInfo *src_file,
451 struct cifsFileInfo *target_file,
452 u64 src_off, u64 len, u64 dest_off);
453 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
454 struct cifsFileInfo *target_file, u64 src_off, u64 len,
456 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
457 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
458 const unsigned char *, const unsigned char *, char *,
459 size_t, struct cifs_sb_info *);
460 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
461 const char *, const void *, const __u16,
462 const struct nls_table *, struct cifs_sb_info *);
463 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
464 const char *, u32 *);
465 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
466 const struct cifs_fid *, u32 *);
467 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
469 /* writepages retry size */
470 unsigned int (*wp_retry_size)(struct inode *);
471 /* get mtu credits */
472 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
473 unsigned int *, struct cifs_credits *);
474 /* adjust previously taken mtu credits to request size */
475 int (*adjust_credits)(struct TCP_Server_Info *server,
476 struct cifs_credits *credits,
477 const unsigned int payload_size);
478 /* check if we need to issue closedir */
479 bool (*dir_needs_close)(struct cifsFileInfo *);
480 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
482 /* init transform request - used for encryption for now */
483 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
484 struct smb_rqst *, struct smb_rqst *);
485 int (*is_transform_hdr)(void *buf);
486 int (*receive_transform)(struct TCP_Server_Info *,
487 struct mid_q_entry **, char **, int *);
488 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
490 int (*next_header)(char *);
491 /* ioctl passthrough for query_info */
492 int (*ioctl_query_info)(const unsigned int xid,
493 struct cifs_tcon *tcon,
494 struct cifs_sb_info *cifs_sb,
495 __le16 *path, int is_dir,
497 /* make unix special files (block, char, fifo, socket) */
498 int (*make_node)(unsigned int xid,
500 struct dentry *dentry,
501 struct cifs_tcon *tcon,
504 dev_t device_number);
505 /* version specific fiemap implementation */
506 int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
507 struct fiemap_extent_info *, u64, u64);
508 /* version specific llseek implementation */
509 loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
512 struct smb_version_values {
513 char *version_string;
515 __u32 req_capabilities;
516 __u32 large_lock_type;
517 __u32 exclusive_lock_type;
518 __u32 shared_lock_type;
519 __u32 unlock_lock_type;
520 size_t header_preamble_size;
522 size_t max_header_size;
523 size_t read_rsp_size;
525 unsigned int cap_unix;
526 unsigned int cap_nt_find;
527 unsigned int cap_large_files;
528 __u16 signing_enabled;
529 __u16 signing_required;
530 size_t create_lease_size;
533 #define HEADER_SIZE(server) (server->vals->header_size)
534 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
541 char *iocharset; /* local code page for mapping to and from Unicode */
542 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
543 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
551 enum securityEnum sectype; /* sectype requested via mnt opts */
552 bool sign; /* was signing requested via mnt opts? */
553 bool ignore_signature:1;
557 bool setuidfromacl:1;
563 bool no_psx_acl:1; /* set if posix acl support should be disabled */
565 bool backupuid_specified; /* mount option backupuid is specified */
566 bool backupgid_specified; /* mount option backupgid is specified */
567 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
568 bool server_ino:1; /* use inode numbers from server ie UniqueId */
570 bool strict_io:1; /* strict cache behavior */
573 bool remap:1; /* set to remap seven reserved chars in filenames */
574 bool sfu_remap:1; /* remap seven reserved chars ala SFU */
575 bool posix_paths:1; /* unset to not ask for posix pathnames. */
579 bool nullauth:1; /* attempt to authenticate with null user */
580 bool nocase:1; /* request case insensitive filenames */
581 bool nobrl:1; /* disable sending byte range locks to srv */
582 bool nohandlecache:1; /* disable caching dir handles if srvr probs */
583 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
584 bool seal:1; /* request transport encryption on share */
585 bool nodfs:1; /* Do not request DFS, even if available */
586 bool local_lease:1; /* check leases only on local system, not remote */
589 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
590 bool no_lease:1; /* disable requesting leases */
591 bool fsc:1; /* enable fscache */
592 bool mfsymlinks:1; /* use Minshall+French Symlinks */
594 bool rwpidforward:1; /* pid forward for read/write operations */
598 bool resilient:1; /* noresilient not required since not fored for CA */
602 bool use_client_guid:1;
603 /* reuse existing guid for multichannel */
604 u8 client_guid[SMB2_CLIENT_GUID_SIZE];
608 unsigned int min_offload;
609 bool sockopt_tcp_nodelay:1;
610 unsigned long actimeo; /* attribute cache timeout (jiffies) */
611 struct smb_version_operations *ops;
612 struct smb_version_values *vals;
614 struct sockaddr_storage dstaddr; /* destination address */
615 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
616 struct nls_table *local_nls;
617 unsigned int echo_interval; /* echo interval in secs */
618 __u64 snapshot_time; /* needed for timewarp tokens */
619 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
620 unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
621 unsigned int max_channels;
622 __u16 compression; /* compression algorithm 0xFFFF default 0=disabled */
623 bool rootfs:1; /* if it's a SMB root file system */
627 * CIFS superblock mount flags (mnt_cifs_flags) to consider when
628 * trying to reuse existing superblock for a new mount
630 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
631 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
632 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
633 CIFS_MOUNT_MAP_SFM_CHR | \
634 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
635 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
636 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
637 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
638 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
639 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
640 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
641 CIFS_MOUNT_UID_FROM_ACL | CIFS_MOUNT_NO_HANDLE_CACHE | \
642 CIFS_MOUNT_NO_DFS | CIFS_MOUNT_MODE_FROM_SID | \
643 CIFS_MOUNT_RO_CACHE | CIFS_MOUNT_RW_CACHE)
646 * Generic VFS superblock mount flags (s_flags) to consider when
647 * trying to reuse existing superblock for a new mount
649 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
650 SB_NODEV | SB_SYNCHRONOUS)
652 struct cifs_mnt_data {
653 struct cifs_sb_info *cifs_sb;
658 static inline unsigned int
659 get_rfc1002_length(void *buf)
661 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
665 inc_rfc1001_len(void *buf, int count)
667 be32_add_cpu((__be32 *)buf, count);
670 struct TCP_Server_Info {
671 struct list_head tcp_ses_list;
672 struct list_head smb_ses_list;
673 int srv_count; /* reference counter */
674 /* 15 character server name + 0x20 16th byte indicating type = srv */
675 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
676 struct smb_version_operations *ops;
677 struct smb_version_values *vals;
678 enum statusEnum tcpStatus; /* what we think the status is */
679 char *hostname; /* hostname portion of UNC string */
680 struct socket *ssocket;
681 struct sockaddr_storage dstaddr;
682 struct sockaddr_storage srcaddr; /* locally bind to this IP */
686 wait_queue_head_t response_q;
687 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
688 struct list_head pending_mid_q;
689 bool noblocksnd; /* use blocking sendmsg */
690 bool noautotune; /* do not autotune send buf sizes */
692 unsigned int credits; /* send no more requests at once */
693 unsigned int max_credits; /* can override large 32000 default at mnt */
694 unsigned int in_flight; /* number of requests on the wire to server */
695 unsigned int max_in_flight; /* max number of requests that were on wire */
696 spinlock_t req_lock; /* protect the two values above */
697 struct mutex srv_mutex;
698 struct task_struct *tsk;
699 char server_GUID[16];
701 bool sign; /* is signing enabled on this connection? */
702 bool ignore_signature:1; /* skip validation of signatures in SMB2/3 rsp */
703 bool session_estab; /* mark when very first sess is established */
704 int echo_credits; /* echo reserved slots */
705 int oplock_credits; /* oplock break reserved slots */
706 bool echoes:1; /* enable echoes */
707 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
708 u16 dialect; /* dialect index that server chose */
709 bool oplocks:1; /* enable oplocks */
710 unsigned int maxReq; /* Clients should submit no more */
711 /* than maxReq distinct unanswered SMBs to the server when using */
712 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
713 unsigned int maxBuf; /* maxBuf specifies the maximum */
714 /* message size the server can send or receive for non-raw SMBs */
715 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
716 /* when socket is setup (and during reconnect) before NegProt sent */
717 unsigned int max_rw; /* maxRw specifies the maximum */
718 /* message size the server can send or receive for */
719 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
720 unsigned int capabilities; /* selective disabling of caps by smb sess */
721 int timeAdj; /* Adjust for difference in server time zone in sec */
722 __u64 CurrentMid; /* multiplex id - rotating counter */
723 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
724 /* 16th byte of RFC1001 workstation name is always null */
725 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
726 __u32 sequence_number; /* for signing, protected by srv_mutex */
727 __u32 reconnect_instance; /* incremented on each reconnect */
728 struct session_key session_key;
729 unsigned long lstrp; /* when we got last response from this server */
730 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
731 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
732 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
733 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
734 char negflavor; /* NEGOTIATE response flavor */
735 /* extended security flavors that server supports */
736 bool sec_ntlmssp; /* supports NTLMSSP */
737 bool sec_kerberosu2u; /* supports U2U Kerberos */
738 bool sec_kerberos; /* supports plain Kerberos */
739 bool sec_mskerberos; /* supports legacy MS Kerberos */
740 bool large_buf; /* is current buffer large? */
741 /* use SMBD connection instead of socket */
743 /* point to the SMBD connection if RDMA is used instead of socket */
744 struct smbd_connection *smbd_conn;
745 struct delayed_work echo; /* echo ping workqueue job */
746 char *smallbuf; /* pointer to current "small" buffer */
747 char *bigbuf; /* pointer to current "big" buffer */
748 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
749 unsigned int pdu_size;
750 unsigned int total_read; /* total amount of data read in this pass */
751 atomic_t in_send; /* requests trying to send */
752 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
753 #ifdef CONFIG_CIFS_FSCACHE
754 struct fscache_cookie *fscache; /* client index cache cookie */
756 #ifdef CONFIG_CIFS_STATS2
757 atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
758 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
759 __u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
760 __u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
761 __u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
763 unsigned int max_read;
764 unsigned int max_write;
765 unsigned int min_offload;
766 __le16 compress_algorithm;
768 /* save initital negprot hash */
769 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
770 bool posix_ext_supported;
771 struct delayed_work reconnect; /* reconnect workqueue job */
772 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
773 unsigned long echo_interval;
776 * Number of targets available for reconnect. The more targets
777 * the more tasks have to wait to let the demultiplex thread
781 bool noblockcnt; /* use non-blocking connect() */
782 bool is_channel; /* if a session channel */
785 struct cifs_credits {
787 unsigned int instance;
790 static inline unsigned int
791 in_flight(struct TCP_Server_Info *server)
794 spin_lock(&server->req_lock);
795 num = server->in_flight;
796 spin_unlock(&server->req_lock);
801 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
804 spin_lock(&server->req_lock);
806 spin_unlock(&server->req_lock);
807 return num >= num_credits;
811 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
814 server->ops->add_credits(server, credits, optype);
818 add_credits_and_wake_if(struct TCP_Server_Info *server,
819 const struct cifs_credits *credits, const int optype)
821 if (credits->value) {
822 server->ops->add_credits(server, credits, optype);
823 wake_up(&server->request_q);
828 set_credits(struct TCP_Server_Info *server, const int val)
830 server->ops->set_credits(server, val);
834 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
835 const unsigned int payload_size)
837 return server->ops->adjust_credits ?
838 server->ops->adjust_credits(server, credits, payload_size) : 0;
842 get_next_mid64(struct TCP_Server_Info *server)
844 return cpu_to_le64(server->ops->get_next_mid(server));
848 get_next_mid(struct TCP_Server_Info *server)
850 __u16 mid = server->ops->get_next_mid(server);
852 * The value in the SMB header should be little endian for easy
853 * on-the-wire decoding.
855 return cpu_to_le16(mid);
859 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
861 if (server->ops->revert_current_mid)
862 server->ops->revert_current_mid(server, val);
866 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
867 const struct smb2_sync_hdr *shdr)
869 unsigned int num = le16_to_cpu(shdr->CreditCharge);
871 return revert_current_mid(server, num > 0 ? num : 1);
875 get_mid(const struct smb_hdr *smb)
877 return le16_to_cpu(smb->Mid);
881 compare_mid(__u16 mid, const struct smb_hdr *smb)
883 return mid == le16_to_cpu(smb->Mid);
887 * When the server supports very large reads and writes via POSIX extensions,
888 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
889 * including the RFC1001 length.
891 * Note that this might make for "interesting" allocation problems during
892 * writeback however as we have to allocate an array of pointers for the
893 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
895 * For reads, there is a similar problem as we need to allocate an array
896 * of kvecs to handle the receive, though that should only need to be done
899 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
900 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
903 * When the server doesn't allow large posix writes, only allow a rsize/wsize
904 * of 2^17-1 minus the size of the call header. That allows for a read or
905 * write up to the maximum size described by RFC1002.
907 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
908 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
911 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
912 * pages in a single call. With PAGE_SIZE == 4k, this means we can fill
913 * a single wsize request with a single call.
915 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
916 #define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024)
919 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
920 * those values when posix extensions aren't in force. In actuality here, we
921 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
922 * to be ok with the extra byte even though Windows doesn't send writes that
927 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
929 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
930 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
933 * Macros to allow the TCP_Server_Info->net field and related code to drop out
934 * when CONFIG_NET_NS isn't set.
939 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
944 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
951 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
956 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
962 struct cifs_server_iface {
964 unsigned int rdma_capable : 1;
965 unsigned int rss_capable : 1;
966 struct sockaddr_storage sockaddr;
970 struct TCP_Server_Info *server;
971 __u8 signkey[SMB3_SIGN_KEY_SIZE];
975 * Session structure. One of these for each uid session with a particular host
978 struct list_head smb_ses_list;
979 struct list_head tcon_list;
980 struct cifs_tcon *tcon_ipc;
981 struct mutex session_mutex;
982 struct TCP_Server_Info *server; /* pointer to server info */
983 int ses_count; /* reference counter */
984 enum statusEnum status;
985 unsigned overrideSecFlg; /* if non-zero override global sec flags */
986 char *serverOS; /* name of operating system underlying server */
987 char *serverNOS; /* name of network operating system of server */
988 char *serverDomain; /* security realm of server */
989 __u64 Suid; /* remote smb uid */
990 kuid_t linux_uid; /* overriding owner of files on the mount */
991 kuid_t cred_uid; /* owner of credentials */
992 unsigned int capabilities;
993 char serverName[SERVER_NAME_LEN_WITH_NULL];
994 char *user_name; /* must not be null except during init of sess
995 and after mount option parsing we fill it */
998 struct session_key auth_key;
999 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
1000 enum securityEnum sectype; /* what security flavor was specified? */
1001 bool sign; /* is signing required? */
1002 bool need_reconnect:1; /* connection reset, uid now invalid */
1004 bool binding:1; /* are we binding the session? */
1005 __u16 session_flags;
1006 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
1007 __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
1008 __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
1009 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
1011 __u8 binding_preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
1014 * Network interfaces available on the server this session is
1017 * Other channels can be opened by connecting and binding this
1018 * session to interfaces from this list.
1020 * iface_lock should be taken when accessing any of these fields
1022 spinlock_t iface_lock;
1023 struct cifs_server_iface *iface_list;
1025 unsigned long iface_last_update; /* jiffies */
1027 #define CIFS_MAX_CHANNELS 16
1028 struct cifs_chan chans[CIFS_MAX_CHANNELS];
1031 atomic_t chan_seq; /* round robin state */
1035 * When binding a new channel, we need to access the channel which isn't fully
1036 * established yet (one past the established count)
1040 struct cifs_chan *cifs_ses_binding_channel(struct cifs_ses *ses)
1043 return &ses->chans[ses->chan_count];
1049 struct TCP_Server_Info *cifs_ses_server(struct cifs_ses *ses)
1052 return ses->chans[ses->chan_count].server;
1058 cap_unix(struct cifs_ses *ses)
1060 return ses->server->vals->cap_unix & ses->capabilities;
1064 bool is_valid:1; /* Do we have a useable root fid */
1065 bool file_all_info_is_valid:1;
1067 struct kref refcount;
1068 struct cifs_fid *fid;
1069 struct mutex fid_mutex;
1070 struct cifs_tcon *tcon;
1071 struct work_struct lease_break;
1072 struct smb2_file_all_info file_all_info;
1076 * there is one of these for each connection to a resource on a particular
1080 struct list_head tcon_list;
1082 struct list_head rlist; /* reconnect list */
1083 atomic_t num_local_opens; /* num of all opens including disconnected */
1084 atomic_t num_remote_opens; /* num of all network opens on server */
1085 struct list_head openFileList;
1086 spinlock_t open_file_lock; /* protects list above */
1087 struct cifs_ses *ses; /* pointer to session associated with */
1088 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
1089 char *nativeFileSystem;
1090 char *password; /* for share-level security */
1091 __u32 tid; /* The 4 byte tree id */
1092 __u16 Flags; /* optional support bits */
1093 enum statusEnum tidStatus;
1094 atomic_t num_smbs_sent;
1097 atomic_t num_writes;
1099 atomic_t num_flushes;
1100 atomic_t num_oplock_brks;
1102 atomic_t num_closes;
1103 atomic_t num_deletes;
1104 atomic_t num_mkdirs;
1105 atomic_t num_posixopens;
1106 atomic_t num_posixmkdirs;
1107 atomic_t num_rmdirs;
1108 atomic_t num_renames;
1109 atomic_t num_t2renames;
1110 atomic_t num_ffirst;
1112 atomic_t num_fclose;
1113 atomic_t num_hardlinks;
1114 atomic_t num_symlinks;
1116 atomic_t num_acl_get;
1117 atomic_t num_acl_set;
1120 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
1121 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
1125 __u64 bytes_written;
1126 spinlock_t stat_lock; /* protects the two fields above */
1127 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
1128 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1129 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
1130 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
1131 bool pipe:1; /* set if connection to pipe share */
1132 bool print:1; /* set if connection to printer share */
1135 bool nohandlecache:1; /* if strange server resource prob can turn off */
1136 bool seal:1; /* transport encryption for this mounted share */
1137 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1138 for this mount even if server would support */
1139 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1140 bool local_lease:1; /* check leases (only) on local system not remote */
1141 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1142 bool broken_sparse_sup; /* if server or share does not support sparse */
1143 bool need_reconnect:1; /* connection reset, tid now invalid */
1144 bool need_reopen_files:1; /* need to reopen tcon file handles */
1145 bool use_resilient:1; /* use resilient instead of durable handles */
1146 bool use_persistent:1; /* use persistent instead of durable handles */
1147 bool no_lease:1; /* Do not request leases on files or directories */
1148 __le32 capabilities;
1150 __u32 maximal_access;
1151 __u32 vol_serial_number;
1152 __le64 vol_create_time;
1153 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1154 __u32 handle_timeout; /* persistent and durable handle timeout in ms */
1155 __u32 ss_flags; /* sector size flags */
1156 __u32 perf_sector_size; /* best sector size for perf */
1158 __u32 max_bytes_chunk;
1159 __u32 max_bytes_copy;
1160 #ifdef CONFIG_CIFS_FSCACHE
1161 u64 resource_id; /* server resource id */
1162 struct fscache_cookie *fscache; /* cookie for share */
1164 struct list_head pending_opens; /* list of incomplete opens */
1165 struct cached_fid crfid; /* Cached root fid */
1166 /* BB add field for back pointer to sb struct(s)? */
1167 #ifdef CONFIG_CIFS_DFS_UPCALL
1170 struct list_head ulist; /* cache update list */
1175 * This is a refcounted and timestamped container for a tcon pointer. The
1176 * container holds a tcon reference. It is considered safe to free one of
1177 * these when the tl_count goes to 0. The tl_time is the time of the last
1178 * "get" on the container.
1181 struct rb_node tl_rbnode;
1183 unsigned long tl_flags;
1184 #define TCON_LINK_MASTER 0
1185 #define TCON_LINK_PENDING 1
1186 #define TCON_LINK_IN_TREE 2
1187 unsigned long tl_time;
1189 struct cifs_tcon *tl_tcon;
1192 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1193 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1195 static inline struct cifs_tcon *
1196 tlink_tcon(struct tcon_link *tlink)
1198 return tlink->tl_tcon;
1201 static inline struct tcon_link *
1202 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1204 return cifs_sb->master_tlink;
1207 extern void cifs_put_tlink(struct tcon_link *tlink);
1209 static inline struct tcon_link *
1210 cifs_get_tlink(struct tcon_link *tlink)
1212 if (tlink && !IS_ERR(tlink))
1213 atomic_inc(&tlink->tl_count);
1217 /* This function is always expected to succeed */
1218 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1220 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1222 struct cifs_pending_open {
1223 struct list_head olist;
1224 struct tcon_link *tlink;
1230 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1231 * This is used to track byte stream locks on the file
1233 struct cifsLockInfo {
1234 struct list_head llist; /* pointer to next cifsLockInfo */
1235 struct list_head blist; /* pointer to locks blocked on this */
1236 wait_queue_head_t block_q;
1245 * One of these for each open instance of a file
1247 struct cifs_search_info {
1248 loff_t index_of_last_entry;
1249 __u16 entries_in_buffer;
1252 char *ntwrk_buf_start;
1253 char *srch_entries_start;
1255 const char *presume_name;
1256 unsigned int resume_name_len;
1260 bool smallBuf:1; /* so we know which buf_release function to call */
1263 #define ACL_NO_MODE ((umode_t)(-1))
1264 struct cifs_open_parms {
1265 struct cifs_tcon *tcon;
1266 struct cifs_sb_info *cifs_sb;
1271 struct cifs_fid *fid;
1278 __u64 persistent_fid; /* persist file id for smb2 */
1279 __u64 volatile_fid; /* volatile file id for smb2 */
1280 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1281 __u8 create_guid[16];
1282 struct cifs_pending_open *pending_open;
1284 #ifdef CONFIG_CIFS_DEBUG2
1286 #endif /* CIFS_DEBUG2 */
1290 struct cifs_fid_locks {
1291 struct list_head llist;
1292 struct cifsFileInfo *cfile; /* fid that owns locks */
1293 struct list_head locks; /* locks held by fid above */
1296 struct cifsFileInfo {
1297 /* following two lists are protected by tcon->open_file_lock */
1298 struct list_head tlist; /* pointer to next fid owned by tcon */
1299 struct list_head flist; /* next fid (file instance) for this inode */
1300 /* lock list below protected by cifsi->lock_sem */
1301 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1302 kuid_t uid; /* allows finding which FileInfo structure */
1303 __u32 pid; /* process id who opened file */
1304 struct cifs_fid fid; /* file id from remote */
1305 struct list_head rlist; /* reconnect list */
1306 /* BB add lock scope info here if needed */ ;
1307 /* lock scope id (0 if none) */
1308 struct dentry *dentry;
1309 struct tcon_link *tlink;
1310 unsigned int f_flags;
1311 bool invalidHandle:1; /* file closed via session abend */
1312 bool oplock_break_cancelled:1;
1313 unsigned int oplock_epoch; /* epoch from the lease break */
1314 __u32 oplock_level; /* oplock/lease level from the lease break */
1316 spinlock_t file_info_lock; /* protects four flag/count fields above */
1317 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1318 struct cifs_search_info srch_inf;
1319 struct work_struct oplock_break; /* work for oplock breaks */
1320 struct work_struct put; /* work for the final part of _put */
1323 struct cifs_io_parms {
1325 __u64 persistent_fid; /* persist file id for smb2 */
1326 __u64 volatile_fid; /* volatile file id for smb2 */
1329 unsigned int length;
1330 struct cifs_tcon *tcon;
1333 struct cifs_aio_ctx {
1334 struct kref refcount;
1335 struct list_head list;
1336 struct mutex aio_mutex;
1337 struct completion done;
1338 struct iov_iter iter;
1340 struct cifsFileInfo *cfile;
1343 unsigned int npages;
1346 unsigned int total_len;
1349 * Indicates if this aio_ctx is for direct_io,
1350 * If yes, iter is a copy of the user passed iov_iter
1355 struct cifs_readdata;
1357 /* asynchronous read support */
1358 struct cifs_readdata {
1359 struct kref refcount;
1360 struct list_head list;
1361 struct completion done;
1362 struct cifsFileInfo *cfile;
1363 struct address_space *mapping;
1364 struct cifs_aio_ctx *ctx;
1367 unsigned int got_bytes;
1370 struct work_struct work;
1371 int (*read_into_pages)(struct TCP_Server_Info *server,
1372 struct cifs_readdata *rdata,
1374 int (*copy_into_pages)(struct TCP_Server_Info *server,
1375 struct cifs_readdata *rdata,
1376 struct iov_iter *iter);
1378 #ifdef CONFIG_CIFS_SMB_DIRECT
1381 unsigned int pagesz;
1382 unsigned int page_offset;
1383 unsigned int tailsz;
1384 struct cifs_credits credits;
1385 unsigned int nr_pages;
1386 struct page **pages;
1389 struct cifs_writedata;
1391 /* asynchronous write support */
1392 struct cifs_writedata {
1393 struct kref refcount;
1394 struct list_head list;
1395 struct completion done;
1396 enum writeback_sync_modes sync_mode;
1397 struct work_struct work;
1398 struct cifsFileInfo *cfile;
1399 struct cifs_aio_ctx *ctx;
1404 #ifdef CONFIG_CIFS_SMB_DIRECT
1407 unsigned int pagesz;
1408 unsigned int page_offset;
1409 unsigned int tailsz;
1410 struct cifs_credits credits;
1411 unsigned int nr_pages;
1412 struct page **pages;
1416 * Take a reference on the file private data. Must be called with
1417 * cfile->file_info_lock held.
1420 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1425 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1426 void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr,
1428 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1430 #define CIFS_CACHE_READ_FLG 1
1431 #define CIFS_CACHE_HANDLE_FLG 2
1432 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1433 #define CIFS_CACHE_WRITE_FLG 4
1434 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1435 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1437 #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))
1438 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1439 #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))
1442 * One of these for each file inode
1445 struct cifsInodeInfo {
1446 bool can_cache_brlcks;
1447 struct list_head llist; /* locks helb by this inode */
1449 * NOTE: Some code paths call down_read(lock_sem) twice, so
1450 * we must always use use cifs_down_write() instead of down_write()
1451 * for this semaphore to avoid deadlocks.
1453 struct rw_semaphore lock_sem; /* protect the fields above */
1454 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1455 struct list_head openFileList;
1456 spinlock_t open_file_lock; /* protects openFileList */
1457 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1458 unsigned int oplock; /* oplock/lease level we have */
1459 unsigned int epoch; /* used to track lease state changes */
1460 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1461 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1462 #define CIFS_INODE_FLAG_UNUSED (2) /* Unused flag */
1463 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1464 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1465 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1466 unsigned long flags;
1467 spinlock_t writers_lock;
1468 unsigned int writers; /* Number of writers on this inode */
1469 unsigned long time; /* jiffies of last update of inode */
1470 u64 server_eof; /* current file size on server -- protected by i_lock */
1471 u64 uniqueid; /* server inode number */
1472 u64 createtime; /* creation time on server */
1473 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1474 #ifdef CONFIG_CIFS_FSCACHE
1475 struct fscache_cookie *fscache;
1477 struct inode vfs_inode;
1480 static inline struct cifsInodeInfo *
1481 CIFS_I(struct inode *inode)
1483 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1486 static inline struct cifs_sb_info *
1487 CIFS_SB(struct super_block *sb)
1489 return sb->s_fs_info;
1492 static inline struct cifs_sb_info *
1493 CIFS_FILE_SB(struct file *file)
1495 return CIFS_SB(file_inode(file)->i_sb);
1498 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1500 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1507 convert_delimiter(char *path, char delim)
1509 char old_delim, *pos;
1517 while ((pos = strchr(pos, old_delim)))
1521 #define cifs_stats_inc atomic_inc
1523 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1527 spin_lock(&tcon->stat_lock);
1528 tcon->bytes_written += bytes;
1529 spin_unlock(&tcon->stat_lock);
1533 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1536 spin_lock(&tcon->stat_lock);
1537 tcon->bytes_read += bytes;
1538 spin_unlock(&tcon->stat_lock);
1543 * This is the prototype for the mid receive function. This function is for
1544 * receiving the rest of the SMB frame, starting with the WordCount (which is
1545 * just after the MID in struct smb_hdr). Note:
1547 * - This will be called by cifsd, with no locks held.
1548 * - The mid will still be on the pending_mid_q.
1549 * - mid->resp_buf will point to the current buffer.
1551 * Returns zero on a successful receive, or an error. The receive state in
1552 * the TCP_Server_Info will also be updated.
1554 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1555 struct mid_q_entry *mid);
1558 * This is the prototype for the mid callback function. This is called once the
1559 * mid has been received off of the socket. When creating one, take special
1560 * care to avoid deadlocks. Things to bear in mind:
1562 * - it will be called by cifsd, with no locks held
1563 * - the mid will be removed from any lists
1565 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1568 * This is the protopyte for mid handle function. This is called once the mid
1569 * has been recognized after decryption of the message.
1571 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1572 struct mid_q_entry *mid);
1574 /* one of these for every pending CIFS request to the server */
1575 struct mid_q_entry {
1576 struct list_head qhead; /* mids waiting on reply from this server */
1577 struct kref refcount;
1578 struct TCP_Server_Info *server; /* server corresponding to this mid */
1579 __u64 mid; /* multiplex id */
1580 __u16 credits; /* number of credits consumed by this mid */
1581 __u16 credits_received; /* number of credits from the response */
1582 __u32 pid; /* process id */
1583 __u32 sequence_number; /* for CIFS signing */
1584 unsigned long when_alloc; /* when mid was created */
1585 #ifdef CONFIG_CIFS_STATS2
1586 unsigned long when_sent; /* time when smb send finished */
1587 unsigned long when_received; /* when demux complete (taken off wire) */
1589 mid_receive_t *receive; /* call receive callback */
1590 mid_callback_t *callback; /* call completion callback */
1591 mid_handle_t *handle; /* call handle mid callback */
1592 void *callback_data; /* general purpose pointer for callback */
1593 struct task_struct *creator;
1594 void *resp_buf; /* pointer to received SMB header */
1595 unsigned int resp_buf_size;
1596 int mid_state; /* wish this were enum but can not pass to wait_event */
1597 unsigned int mid_flags;
1598 __le16 command; /* smb command code */
1599 unsigned int optype; /* operation type */
1600 bool large_buf:1; /* if valid response, is pointer to large buf */
1601 bool multiRsp:1; /* multiple trans2 responses for one request */
1602 bool multiEnd:1; /* both received */
1603 bool decrypted:1; /* decrypted entry */
1606 struct close_cancelled_open {
1607 struct cifs_fid fid;
1608 struct cifs_tcon *tcon;
1609 struct work_struct work;
1614 /* Make code in transport.c a little cleaner by moving
1615 update of optional stats into function below */
1616 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1618 atomic_inc(&server->in_send);
1621 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1623 atomic_dec(&server->in_send);
1626 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1628 atomic_inc(&server->num_waiters);
1631 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1633 atomic_dec(&server->num_waiters);
1636 #ifdef CONFIG_CIFS_STATS2
1637 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1639 mid->when_sent = jiffies;
1642 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1647 /* for pending dnotify requests */
1648 struct dir_notify_req {
1649 struct list_head lhead;
1656 __u32 filter; /* CompletionFilter (for multishot) */
1661 struct dfs_info3_param {
1662 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1672 * common struct for holding inode info when searching for or updating an
1673 * inode with new info
1676 #define CIFS_FATTR_DFS_REFERRAL 0x1
1677 #define CIFS_FATTR_DELETE_PENDING 0x2
1678 #define CIFS_FATTR_NEED_REVAL 0x4
1679 #define CIFS_FATTR_INO_COLLISION 0x8
1680 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1681 #define CIFS_FATTR_FAKE_ROOT_INO 0x20
1694 unsigned int cf_nlink;
1695 unsigned int cf_dtype;
1696 struct timespec64 cf_atime;
1697 struct timespec64 cf_mtime;
1698 struct timespec64 cf_ctime;
1702 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1705 kfree(param->path_name);
1706 kfree(param->node_name);
1710 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1711 int number_of_items)
1714 if ((number_of_items == 0) || (param == NULL))
1716 for (i = 0; i < number_of_items; i++) {
1717 kfree(param[i].path_name);
1718 kfree(param[i].node_name);
1723 static inline bool is_interrupt_error(int error)
1728 case -ERESTARTNOHAND:
1729 case -ERESTARTNOINTR:
1735 static inline bool is_retryable_error(int error)
1737 if (is_interrupt_error(error) || error == -EAGAIN)
1743 #define MID_REQUEST_ALLOCATED 1
1744 #define MID_REQUEST_SUBMITTED 2
1745 #define MID_RESPONSE_RECEIVED 4
1746 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1747 #define MID_RESPONSE_MALFORMED 0x10
1748 #define MID_SHUTDOWN 0x20
1751 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1752 #define MID_DELETED 2 /* Mid has been dequeued/deleted */
1754 /* Types of response buffer returned from SendReceive2 */
1755 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1756 #define CIFS_SMALL_BUFFER 1
1757 #define CIFS_LARGE_BUFFER 2
1758 #define CIFS_IOVEC 4 /* array of response buffers */
1760 /* Type of Request to SendReceive2 */
1761 #define CIFS_BLOCKING_OP 1 /* operation can block */
1762 #define CIFS_NON_BLOCKING 2 /* do not block waiting for credits */
1763 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1764 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1765 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1766 #define CIFS_NO_RSP_BUF 0x040 /* no response buffer required */
1768 /* Type of request operation */
1769 #define CIFS_ECHO_OP 0x080 /* echo request */
1770 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1771 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1772 #define CIFS_OP_MASK 0x0380 /* mask request type */
1774 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1775 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1776 #define CIFS_NO_SRV_RSP 0x1000 /* there is no server response */
1778 /* Security Flags: indicate type of session setup needed */
1779 #define CIFSSEC_MAY_SIGN 0x00001
1780 #define CIFSSEC_MAY_NTLM 0x00002
1781 #define CIFSSEC_MAY_NTLMV2 0x00004
1782 #define CIFSSEC_MAY_KRB5 0x00008
1783 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1784 #define CIFSSEC_MAY_LANMAN 0x00010
1785 #define CIFSSEC_MAY_PLNTXT 0x00020
1787 #define CIFSSEC_MAY_LANMAN 0
1788 #define CIFSSEC_MAY_PLNTXT 0
1789 #endif /* weak passwords */
1790 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1791 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1793 #define CIFSSEC_MUST_SIGN 0x01001
1794 /* note that only one of the following can be set so the
1795 result of setting MUST flags more than once will be to
1796 require use of the stronger protocol */
1797 #define CIFSSEC_MUST_NTLM 0x02002
1798 #define CIFSSEC_MUST_NTLMV2 0x04004
1799 #define CIFSSEC_MUST_KRB5 0x08008
1800 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1801 #define CIFSSEC_MUST_LANMAN 0x10010
1802 #define CIFSSEC_MUST_PLNTXT 0x20020
1803 #ifdef CONFIG_CIFS_UPCALL
1804 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1806 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1808 #else /* do not allow weak pw hash */
1809 #define CIFSSEC_MUST_LANMAN 0
1810 #define CIFSSEC_MUST_PLNTXT 0
1811 #ifdef CONFIG_CIFS_UPCALL
1812 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1814 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1816 #endif /* WEAK_PW_HASH */
1817 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1818 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1820 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1821 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1822 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1824 *****************************************************************
1825 * All constants go here
1826 *****************************************************************
1829 #define UID_HASH (16)
1832 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1833 * following to be declared.
1836 /****************************************************************************
1837 * Locking notes. All updates to global variables and lists should be
1838 * protected by spinlocks or semaphores.
1842 * GlobalMid_Lock protects:
1843 * list operations on pending_mid_q and oplockQ
1844 * updates to XID counters, multiplex id and SMB sequence numbers
1845 * list operations on global DnotifyReqList
1846 * tcp_ses_lock protects:
1847 * list operations on tcp and SMB session lists
1848 * tcon->open_file_lock protects the list of open files hanging off the tcon
1849 * inode->open_file_lock protects the openFileList hanging off the inode
1850 * cfile->file_info_lock protects counters and fields in cifs file struct
1851 * f_owner.lock protects certain per file struct operations
1852 * mapping->page_lock protects certain per page operations
1854 * Note that the cifs_tcon.open_file_lock should be taken before
1855 * not after the cifsInodeInfo.open_file_lock
1859 * sesSem operations on smb session
1860 * tconSem operations on tree connection
1861 * fh_sem file handle reconnection operations
1863 ****************************************************************************/
1865 #ifdef DECLARE_GLOBALS_HERE
1866 #define GLOBAL_EXTERN
1868 #define GLOBAL_EXTERN extern
1872 * the list of TCP_Server_Info structures, ie each of the sockets
1873 * connecting our client to a distinct server (ip address), is
1874 * chained together by cifs_tcp_ses_list. The list of all our SMB
1875 * sessions (and from that the tree connections) can be found
1876 * by iterating over cifs_tcp_ses_list
1878 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1881 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1882 * tcp session, and the list of tcon's per smb session. It also protects
1883 * the reference counters for the server, smb session, and tcon. Finally,
1884 * changes to the tcon->tidStatus should be done while holding this lock.
1885 * generally the locks should be taken in order tcp_ses_lock before
1886 * tcon->open_file_lock and that before file->file_info_lock since the
1887 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1889 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1891 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1892 /* Outstanding dir notify requests */
1893 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1894 /* DirNotify response queue */
1895 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1896 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1899 * Global transaction id (XID) information
1901 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1902 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1903 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1904 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1905 /* on midQ entries */
1907 * Global counters, updated atomically
1909 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1910 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1911 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1912 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1913 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1915 /* Various Debug counters */
1916 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1917 #ifdef CONFIG_CIFS_STATS2
1918 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1919 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1920 extern unsigned int slow_rsp_threshold; /* number of secs before logging */
1922 GLOBAL_EXTERN atomic_t smBufAllocCount;
1923 GLOBAL_EXTERN atomic_t midCount;
1926 extern bool enable_oplocks; /* enable or disable oplocks */
1927 extern bool lookupCacheEnabled;
1928 extern unsigned int global_secflags; /* if on, session setup sent
1929 with more secure ntlmssp2 challenge/resp */
1930 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1931 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1932 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
1933 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1934 extern unsigned int cifs_min_small; /* min size of small buf pool */
1935 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
1936 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
1938 GLOBAL_EXTERN struct rb_root uidtree;
1939 GLOBAL_EXTERN struct rb_root gidtree;
1940 GLOBAL_EXTERN spinlock_t siduidlock;
1941 GLOBAL_EXTERN spinlock_t sidgidlock;
1942 GLOBAL_EXTERN struct rb_root siduidtree;
1943 GLOBAL_EXTERN struct rb_root sidgidtree;
1944 GLOBAL_EXTERN spinlock_t uidsidlock;
1945 GLOBAL_EXTERN spinlock_t gidsidlock;
1947 void cifs_oplock_break(struct work_struct *work);
1948 void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
1950 extern const struct slow_work_ops cifs_oplock_break_ops;
1951 extern struct workqueue_struct *cifsiod_wq;
1952 extern struct workqueue_struct *decrypt_wq;
1953 extern struct workqueue_struct *fileinfo_put_wq;
1954 extern struct workqueue_struct *cifsoplockd_wq;
1955 extern __u32 cifs_lock_secret;
1957 extern mempool_t *cifs_mid_poolp;
1959 /* Operations for different SMB versions */
1960 #define SMB1_VERSION_STRING "1.0"
1961 extern struct smb_version_operations smb1_operations;
1962 extern struct smb_version_values smb1_values;
1963 #define SMB20_VERSION_STRING "2.0"
1964 extern struct smb_version_operations smb20_operations;
1965 extern struct smb_version_values smb20_values;
1966 #define SMB21_VERSION_STRING "2.1"
1967 extern struct smb_version_operations smb21_operations;
1968 extern struct smb_version_values smb21_values;
1969 #define SMBDEFAULT_VERSION_STRING "default"
1970 extern struct smb_version_values smbdefault_values;
1971 #define SMB3ANY_VERSION_STRING "3"
1972 extern struct smb_version_values smb3any_values;
1973 #define SMB30_VERSION_STRING "3.0"
1974 extern struct smb_version_operations smb30_operations;
1975 extern struct smb_version_values smb30_values;
1976 #define SMB302_VERSION_STRING "3.02"
1977 #define ALT_SMB302_VERSION_STRING "3.0.2"
1978 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1979 extern struct smb_version_values smb302_values;
1980 #define SMB311_VERSION_STRING "3.1.1"
1981 #define ALT_SMB311_VERSION_STRING "3.11"
1982 extern struct smb_version_operations smb311_operations;
1983 extern struct smb_version_values smb311_values;
1985 static inline bool is_smb1_server(struct TCP_Server_Info *server)
1987 return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
1990 #endif /* _CIFS_GLOB_H */