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_REQ is the maximum number of requests that WE will send
64 * on one socket concurrently.
66 #define CIFS_MAX_REQ 32767
68 #define RFC1001_NAME_LEN 15
69 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
71 /* maximum length of ip addr as a string (including ipv6 and sctp) */
72 #define SERVER_NAME_LENGTH 80
73 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
75 /* echo interval in seconds */
76 #define SMB_ECHO_INTERVAL_MIN 1
77 #define SMB_ECHO_INTERVAL_MAX 600
78 #define SMB_ECHO_INTERVAL_DEFAULT 60
80 /* maximum number of PDUs in one compound */
81 #define MAX_COMPOUND 5
84 * Default number of credits to keep available for SMB3.
85 * This value is chosen somewhat arbitrarily. The Windows client
86 * defaults to 128 credits, the Windows server allows clients up to
87 * 512 credits (or 8K for later versions), and the NetApp server
88 * does not limit clients at all. Choose a high enough default value
89 * such that the client shouldn't limit performance, but allow mount
90 * to override (until you approach 64K, where we limit credits to 65000
91 * to reduce possibility of seeing more server credit overflow bugs.
93 #define SMB2_MAX_CREDITS_AVAILABLE 32000
97 #ifndef XATTR_DOS_ATTRIB
98 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
102 * CIFS vfs client Status information (based on what we know.)
105 /* associated with each tcp and smb session */
115 Unspecified = 0, /* not specified */
116 LANMAN, /* Legacy LANMAN auth */
117 NTLM, /* Legacy NTLM012 auth with NTLM hash */
118 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
119 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
120 Kerberos, /* Kerberos via SPNEGO */
128 /* crypto security descriptor definition */
130 struct shash_desc shash;
134 /* crypto hashing related structure/fields, not specific to a sec mech */
135 struct cifs_secmech {
136 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
137 struct crypto_shash *md5; /* md5 hash function */
138 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
139 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
140 struct crypto_shash *sha512; /* sha512 hash function */
141 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
142 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
143 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
144 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
145 struct sdesc *sdescsha512; /* ctxt to generate smb3.11 signing key */
146 struct crypto_aead *ccmaesencrypt; /* smb3 encryption aead */
147 struct crypto_aead *ccmaesdecrypt; /* smb3 decryption aead */
150 /* per smb session structure/fields */
151 struct ntlmssp_auth {
152 bool sesskey_per_smbsess; /* whether session key is per smb session */
153 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
154 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
155 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
156 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
164 struct cifs_sid osid;
165 struct cifs_sid gsid;
166 struct cifs_ntace *ntaces;
167 struct cifs_ace *aces;
171 *****************************************************************
172 * Except the CIFS PDUs themselves all the
173 * globally interesting structs should go here
174 *****************************************************************
178 * A smb_rqst represents a complete request to be issued to a server. It's
179 * formed by a kvec array, followed by an array of pages. Page data is assumed
180 * to start at the beginning of the first page.
183 struct kvec *rq_iov; /* array of kvecs */
184 unsigned int rq_nvec; /* number of kvecs in array */
185 struct page **rq_pages; /* pointer to array of page ptrs */
186 unsigned int rq_offset; /* the offset to the 1st page */
187 unsigned int rq_npages; /* number pages in array */
188 unsigned int rq_pagesz; /* page size to use */
189 unsigned int rq_tailsz; /* length of last page */
205 struct TCP_Server_Info;
209 struct dfs_info3_param;
213 struct cifs_readdata;
214 struct cifs_writedata;
215 struct cifs_io_parms;
216 struct cifs_search_info;
217 struct cifsInodeInfo;
218 struct cifs_open_parms;
221 struct smb_version_operations {
222 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
223 struct mid_q_entry *);
224 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
225 /* setup request: allocate mid, sign message */
226 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
228 /* setup async request: allocate mid, sign message */
229 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
231 /* check response: verify signature, map error */
232 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
234 void (*add_credits)(struct TCP_Server_Info *server,
235 const struct cifs_credits *credits,
237 void (*set_credits)(struct TCP_Server_Info *, const int);
238 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
239 unsigned int (*get_credits)(struct mid_q_entry *);
240 __u64 (*get_next_mid)(struct TCP_Server_Info *);
241 void (*revert_current_mid)(struct TCP_Server_Info *server,
242 const unsigned int val);
243 /* data offset from read response message */
244 unsigned int (*read_data_offset)(char *);
246 * Data length from read response message
247 * When in_remaining is true, the returned data length is in
248 * message field DataRemaining for out-of-band data read (e.g through
249 * Memory Registration RDMA write in SMBD).
250 * Otherwise, the returned data length is in message field DataLength.
252 unsigned int (*read_data_length)(char *, bool in_remaining);
253 /* map smb to linux error */
254 int (*map_error)(char *, bool);
255 /* find mid corresponding to the response message */
256 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
257 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
258 void (*clear_stats)(struct cifs_tcon *);
259 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
260 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
261 /* verify the message */
262 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
263 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
264 int (*handle_cancelled_mid)(char *, struct TCP_Server_Info *);
265 void (*downgrade_oplock)(struct TCP_Server_Info *,
266 struct cifsInodeInfo *, bool);
267 /* process transaction2 response */
268 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
270 /* check if we need to negotiate */
271 bool (*need_neg)(struct TCP_Server_Info *);
272 /* negotiate to the server */
273 int (*negotiate)(const unsigned int, struct cifs_ses *);
274 /* set negotiated write size */
275 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
276 /* set negotiated read size */
277 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
278 /* setup smb sessionn */
279 int (*sess_setup)(const unsigned int, struct cifs_ses *,
280 const struct nls_table *);
281 /* close smb session */
282 int (*logoff)(const unsigned int, struct cifs_ses *);
283 /* connect to a server share */
284 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
285 struct cifs_tcon *, const struct nls_table *);
286 /* close tree connecion */
287 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
288 /* get DFS referrals */
289 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
290 const char *, struct dfs_info3_param **,
291 unsigned int *, const struct nls_table *, int);
292 /* informational QFS call */
293 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
294 /* check if a path is accessible or not */
295 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
296 struct cifs_sb_info *, const char *);
297 /* query path data from the server */
298 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
299 struct cifs_sb_info *, const char *,
300 FILE_ALL_INFO *, bool *, bool *);
301 /* query file data from the server */
302 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
303 struct cifs_fid *, FILE_ALL_INFO *);
304 /* get server index number */
305 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
306 struct cifs_sb_info *, const char *,
307 u64 *uniqueid, FILE_ALL_INFO *);
308 /* set size by path */
309 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
310 const char *, __u64, struct cifs_sb_info *, bool);
311 /* set size by file handle */
312 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
313 struct cifsFileInfo *, __u64, bool);
315 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
317 int (*set_compression)(const unsigned int, struct cifs_tcon *,
318 struct cifsFileInfo *);
319 /* check if we can send an echo or nor */
320 bool (*can_echo)(struct TCP_Server_Info *);
321 /* send echo request */
322 int (*echo)(struct TCP_Server_Info *);
323 /* create directory */
324 int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
325 umode_t mode, struct cifs_tcon *tcon,
326 const char *full_path,
327 struct cifs_sb_info *cifs_sb);
328 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
329 struct cifs_sb_info *);
330 /* set info on created directory */
331 void (*mkdir_setinfo)(struct inode *, const char *,
332 struct cifs_sb_info *, struct cifs_tcon *,
334 /* remove directory */
335 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
336 struct cifs_sb_info *);
338 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
339 struct cifs_sb_info *);
340 /* open, rename and delete file */
341 int (*rename_pending_delete)(const char *, struct dentry *,
343 /* send rename request */
344 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
345 const char *, struct cifs_sb_info *);
346 /* send create hardlink request */
347 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
348 const char *, const char *,
349 struct cifs_sb_info *);
350 /* query symlink target */
351 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
352 const char *, char **, struct cifs_sb_info *);
353 /* open a file for non-posix mounts */
354 int (*open)(const unsigned int, struct cifs_open_parms *,
355 __u32 *, FILE_ALL_INFO *);
356 /* set fid protocol-specific info */
357 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
359 void (*close)(const unsigned int, struct cifs_tcon *,
361 /* send a flush request to the server */
362 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
363 /* async read from the server */
364 int (*async_readv)(struct cifs_readdata *);
365 /* async write to the server */
366 int (*async_writev)(struct cifs_writedata *,
367 void (*release)(struct kref *));
368 /* sync read from the server */
369 int (*sync_read)(const unsigned int, struct cifs_fid *,
370 struct cifs_io_parms *, unsigned int *, char **,
372 /* sync write to the server */
373 int (*sync_write)(const unsigned int, struct cifs_fid *,
374 struct cifs_io_parms *, unsigned int *, struct kvec *,
376 /* open dir, start readdir */
377 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
378 const char *, struct cifs_sb_info *,
379 struct cifs_fid *, __u16,
380 struct cifs_search_info *);
381 /* continue readdir */
382 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
384 __u16, struct cifs_search_info *srch_inf);
386 int (*close_dir)(const unsigned int, struct cifs_tcon *,
388 /* calculate a size of SMB message */
389 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
390 /* check for STATUS_PENDING and process the response if yes */
391 bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
392 /* check for STATUS_NETWORK_SESSION_EXPIRED */
393 bool (*is_session_expired)(char *);
394 /* send oplock break response */
395 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
396 struct cifsInodeInfo *);
397 /* query remote filesystem */
398 int (*queryfs)(const unsigned int, struct cifs_tcon *,
400 /* send mandatory brlock to the server */
401 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
402 __u64, __u32, int, int, bool);
403 /* unlock range of mandatory locks */
404 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
406 /* push brlocks from the cache to the server */
407 int (*push_mand_locks)(struct cifsFileInfo *);
408 /* get lease key of the inode */
409 void (*get_lease_key)(struct inode *, struct cifs_fid *);
410 /* set lease key of the inode */
411 void (*set_lease_key)(struct inode *, struct cifs_fid *);
412 /* generate new lease key */
413 void (*new_lease_key)(struct cifs_fid *);
414 int (*generate_signingkey)(struct cifs_ses *);
415 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
416 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
417 struct cifsFileInfo *src_file);
418 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
419 struct cifsFileInfo *src_file, void __user *);
420 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
421 struct cifs_sb_info *, const unsigned char *,
422 char *, unsigned int *);
423 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
424 struct cifs_sb_info *, const unsigned char *,
425 char *, unsigned int *);
426 /* if we can do cache read operations */
427 bool (*is_read_op)(__u32);
428 /* set oplock level for the inode */
429 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
431 /* create lease context buffer for CREATE request */
432 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
433 /* parse lease context buffer and return oplock/epoch info */
434 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
435 ssize_t (*copychunk_range)(const unsigned int,
436 struct cifsFileInfo *src_file,
437 struct cifsFileInfo *target_file,
438 u64 src_off, u64 len, u64 dest_off);
439 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
440 struct cifsFileInfo *target_file, u64 src_off, u64 len,
442 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
443 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
444 const unsigned char *, const unsigned char *, char *,
445 size_t, struct cifs_sb_info *);
446 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
447 const char *, const void *, const __u16,
448 const struct nls_table *, struct cifs_sb_info *);
449 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
450 const char *, u32 *);
451 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
452 const struct cifs_fid *, u32 *);
453 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
455 /* writepages retry size */
456 unsigned int (*wp_retry_size)(struct inode *);
457 /* get mtu credits */
458 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
459 unsigned int *, struct cifs_credits *);
460 /* adjust previously taken mtu credits to request size */
461 int (*adjust_credits)(struct TCP_Server_Info *server,
462 struct cifs_credits *credits,
463 const unsigned int payload_size);
464 /* check if we need to issue closedir */
465 bool (*dir_needs_close)(struct cifsFileInfo *);
466 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
468 /* init transform request - used for encryption for now */
469 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
470 struct smb_rqst *, struct smb_rqst *);
471 int (*is_transform_hdr)(void *buf);
472 int (*receive_transform)(struct TCP_Server_Info *,
473 struct mid_q_entry **, char **, int *);
474 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
476 int (*next_header)(char *);
477 /* ioctl passthrough for query_info */
478 int (*ioctl_query_info)(const unsigned int xid,
479 struct cifs_tcon *tcon,
480 __le16 *path, int is_dir,
482 /* make unix special files (block, char, fifo, socket) */
483 int (*make_node)(unsigned int xid,
485 struct dentry *dentry,
486 struct cifs_tcon *tcon,
489 dev_t device_number);
492 struct smb_version_values {
493 char *version_string;
495 __u32 req_capabilities;
496 __u32 large_lock_type;
497 __u32 exclusive_lock_type;
498 __u32 shared_lock_type;
499 __u32 unlock_lock_type;
500 size_t header_preamble_size;
502 size_t max_header_size;
503 size_t read_rsp_size;
505 unsigned int cap_unix;
506 unsigned int cap_nt_find;
507 unsigned int cap_large_files;
508 __u16 signing_enabled;
509 __u16 signing_required;
510 size_t create_lease_size;
513 #define HEADER_SIZE(server) (server->vals->header_size)
514 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
521 char *iocharset; /* local code page for mapping to and from Unicode */
522 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
523 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
531 enum securityEnum sectype; /* sectype requested via mnt opts */
532 bool sign; /* was signing requested via mnt opts? */
536 bool setuidfromacl:1;
541 bool no_psx_acl:1; /* set if posix acl support should be disabled */
543 bool backupuid_specified; /* mount option backupuid is specified */
544 bool backupgid_specified; /* mount option backupgid is specified */
545 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
546 bool server_ino:1; /* use inode numbers from server ie UniqueId */
548 bool strict_io:1; /* strict cache behavior */
549 bool remap:1; /* set to remap seven reserved chars in filenames */
550 bool sfu_remap:1; /* remap seven reserved chars ala SFU */
551 bool posix_paths:1; /* unset to not ask for posix pathnames. */
555 bool nullauth:1; /* attempt to authenticate with null user */
556 bool nocase:1; /* request case insensitive filenames */
557 bool nobrl:1; /* disable sending byte range locks to srv */
558 bool nohandlecache:1; /* disable caching dir handles if srvr probs */
559 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
560 bool seal:1; /* request transport encryption on share */
561 bool nodfs:1; /* Do not request DFS, even if available */
562 bool local_lease:1; /* check leases only on local system, not remote */
565 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
566 bool fsc:1; /* enable fscache */
567 bool mfsymlinks:1; /* use Minshall+French Symlinks */
569 bool rwpidforward:1; /* pid forward for read/write operations */
573 bool resilient:1; /* noresilient not required since not fored for CA */
579 bool sockopt_tcp_nodelay:1;
580 unsigned long actimeo; /* attribute cache timeout (jiffies) */
581 struct smb_version_operations *ops;
582 struct smb_version_values *vals;
584 struct sockaddr_storage dstaddr; /* destination address */
585 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
586 struct nls_table *local_nls;
587 unsigned int echo_interval; /* echo interval in secs */
588 __u64 snapshot_time; /* needed for timewarp tokens */
589 unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
592 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
593 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
594 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
595 CIFS_MOUNT_MAP_SFM_CHR | \
596 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
597 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
598 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
599 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
600 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
601 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
602 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
604 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
605 SB_NODEV | SB_SYNCHRONOUS)
607 struct cifs_mnt_data {
608 struct cifs_sb_info *cifs_sb;
613 static inline unsigned int
614 get_rfc1002_length(void *buf)
616 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
620 inc_rfc1001_len(void *buf, int count)
622 be32_add_cpu((__be32 *)buf, count);
625 struct TCP_Server_Info {
626 struct list_head tcp_ses_list;
627 struct list_head smb_ses_list;
628 int srv_count; /* reference counter */
629 /* 15 character server name + 0x20 16th byte indicating type = srv */
630 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
631 struct smb_version_operations *ops;
632 struct smb_version_values *vals;
633 enum statusEnum tcpStatus; /* what we think the status is */
634 char *hostname; /* hostname portion of UNC string */
635 struct socket *ssocket;
636 struct sockaddr_storage dstaddr;
637 struct sockaddr_storage srcaddr; /* locally bind to this IP */
641 wait_queue_head_t response_q;
642 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
643 struct list_head pending_mid_q;
644 bool noblocksnd; /* use blocking sendmsg */
645 bool noautotune; /* do not autotune send buf sizes */
647 unsigned int credits; /* send no more requests at once */
648 unsigned int max_credits; /* can override large 32000 default at mnt */
649 unsigned int in_flight; /* number of requests on the wire to server */
650 spinlock_t req_lock; /* protect the two values above */
651 struct mutex srv_mutex;
652 struct task_struct *tsk;
653 char server_GUID[16];
655 bool sign; /* is signing enabled on this connection? */
656 bool session_estab; /* mark when very first sess is established */
657 int echo_credits; /* echo reserved slots */
658 int oplock_credits; /* oplock break reserved slots */
659 bool echoes:1; /* enable echoes */
660 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
661 u16 dialect; /* dialect index that server chose */
662 bool oplocks:1; /* enable oplocks */
663 unsigned int maxReq; /* Clients should submit no more */
664 /* than maxReq distinct unanswered SMBs to the server when using */
665 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
666 unsigned int maxBuf; /* maxBuf specifies the maximum */
667 /* message size the server can send or receive for non-raw SMBs */
668 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
669 /* when socket is setup (and during reconnect) before NegProt sent */
670 unsigned int max_rw; /* maxRw specifies the maximum */
671 /* message size the server can send or receive for */
672 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
673 unsigned int capabilities; /* selective disabling of caps by smb sess */
674 int timeAdj; /* Adjust for difference in server time zone in sec */
675 __u64 CurrentMid; /* multiplex id - rotating counter */
676 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
677 /* 16th byte of RFC1001 workstation name is always null */
678 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
679 __u32 sequence_number; /* for signing, protected by srv_mutex */
680 __u32 reconnect_instance; /* incremented on each reconnect */
681 struct session_key session_key;
682 unsigned long lstrp; /* when we got last response from this server */
683 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
684 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
685 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
686 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
687 char negflavor; /* NEGOTIATE response flavor */
688 /* extended security flavors that server supports */
689 bool sec_ntlmssp; /* supports NTLMSSP */
690 bool sec_kerberosu2u; /* supports U2U Kerberos */
691 bool sec_kerberos; /* supports plain Kerberos */
692 bool sec_mskerberos; /* supports legacy MS Kerberos */
693 bool large_buf; /* is current buffer large? */
694 /* use SMBD connection instead of socket */
696 /* point to the SMBD connection if RDMA is used instead of socket */
697 struct smbd_connection *smbd_conn;
698 struct delayed_work echo; /* echo ping workqueue job */
699 char *smallbuf; /* pointer to current "small" buffer */
700 char *bigbuf; /* pointer to current "big" buffer */
701 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
702 unsigned int pdu_size;
703 unsigned int total_read; /* total amount of data read in this pass */
704 #ifdef CONFIG_CIFS_FSCACHE
705 struct fscache_cookie *fscache; /* client index cache cookie */
707 #ifdef CONFIG_CIFS_STATS2
708 atomic_t in_send; /* requests trying to send */
709 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
710 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
712 unsigned int max_read;
713 unsigned int max_write;
715 /* save initital negprot hash */
716 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
717 bool posix_ext_supported;
718 struct delayed_work reconnect; /* reconnect workqueue job */
719 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
720 unsigned long echo_interval;
723 * Number of targets available for reconnect. The more targets
724 * the more tasks have to wait to let the demultiplex thread
730 struct cifs_credits {
732 unsigned int instance;
735 static inline unsigned int
736 in_flight(struct TCP_Server_Info *server)
739 spin_lock(&server->req_lock);
740 num = server->in_flight;
741 spin_unlock(&server->req_lock);
746 has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
749 spin_lock(&server->req_lock);
751 spin_unlock(&server->req_lock);
752 return num >= num_credits;
756 add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
759 server->ops->add_credits(server, credits, optype);
763 add_credits_and_wake_if(struct TCP_Server_Info *server,
764 const struct cifs_credits *credits, const int optype)
766 if (credits->value) {
767 server->ops->add_credits(server, credits, optype);
768 wake_up(&server->request_q);
773 set_credits(struct TCP_Server_Info *server, const int val)
775 server->ops->set_credits(server, val);
779 adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
780 const unsigned int payload_size)
782 return server->ops->adjust_credits ?
783 server->ops->adjust_credits(server, credits, payload_size) : 0;
787 get_next_mid64(struct TCP_Server_Info *server)
789 return cpu_to_le64(server->ops->get_next_mid(server));
793 get_next_mid(struct TCP_Server_Info *server)
795 __u16 mid = server->ops->get_next_mid(server);
797 * The value in the SMB header should be little endian for easy
798 * on-the-wire decoding.
800 return cpu_to_le16(mid);
804 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
806 if (server->ops->revert_current_mid)
807 server->ops->revert_current_mid(server, val);
811 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
812 const struct smb2_sync_hdr *shdr)
814 unsigned int num = le16_to_cpu(shdr->CreditCharge);
816 return revert_current_mid(server, num > 0 ? num : 1);
820 get_mid(const struct smb_hdr *smb)
822 return le16_to_cpu(smb->Mid);
826 compare_mid(__u16 mid, const struct smb_hdr *smb)
828 return mid == le16_to_cpu(smb->Mid);
832 * When the server supports very large reads and writes via POSIX extensions,
833 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
834 * including the RFC1001 length.
836 * Note that this might make for "interesting" allocation problems during
837 * writeback however as we have to allocate an array of pointers for the
838 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
840 * For reads, there is a similar problem as we need to allocate an array
841 * of kvecs to handle the receive, though that should only need to be done
844 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
845 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
848 * When the server doesn't allow large posix writes, only allow a rsize/wsize
849 * of 2^17-1 minus the size of the call header. That allows for a read or
850 * write up to the maximum size described by RFC1002.
852 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
853 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
856 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
857 * pages in a single call. With PAGE_SIZE == 4k, this means we can fill
858 * a single wsize request with a single call.
860 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
861 #define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024)
864 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
865 * those values when posix extensions aren't in force. In actuality here, we
866 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
867 * to be ok with the extra byte even though Windows doesn't send writes that
872 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
874 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
875 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
878 * Macros to allow the TCP_Server_Info->net field and related code to drop out
879 * when CONFIG_NET_NS isn't set.
884 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
889 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
896 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
901 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
907 struct cifs_server_iface {
909 unsigned int rdma_capable : 1;
910 unsigned int rss_capable : 1;
911 struct sockaddr_storage sockaddr;
915 * Session structure. One of these for each uid session with a particular host
918 struct list_head smb_ses_list;
919 struct list_head tcon_list;
920 struct cifs_tcon *tcon_ipc;
921 struct mutex session_mutex;
922 struct TCP_Server_Info *server; /* pointer to server info */
923 int ses_count; /* reference counter */
924 enum statusEnum status;
925 unsigned overrideSecFlg; /* if non-zero override global sec flags */
926 char *serverOS; /* name of operating system underlying server */
927 char *serverNOS; /* name of network operating system of server */
928 char *serverDomain; /* security realm of server */
929 __u64 Suid; /* remote smb uid */
930 kuid_t linux_uid; /* overriding owner of files on the mount */
931 kuid_t cred_uid; /* owner of credentials */
932 unsigned int capabilities;
933 char serverName[SERVER_NAME_LEN_WITH_NULL];
934 char *user_name; /* must not be null except during init of sess
935 and after mount option parsing we fill it */
938 struct session_key auth_key;
939 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
940 enum securityEnum sectype; /* what security flavor was specified? */
941 bool sign; /* is signing required? */
942 bool need_reconnect:1; /* connection reset, uid now invalid */
945 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
946 __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
947 __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
948 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
951 * Network interfaces available on the server this session is
954 * Other channels can be opened by connecting and binding this
955 * session to interfaces from this list.
957 * iface_lock should be taken when accessing any of these fields
959 spinlock_t iface_lock;
960 struct cifs_server_iface *iface_list;
962 unsigned long iface_last_update; /* jiffies */
966 cap_unix(struct cifs_ses *ses)
968 return ses->server->vals->cap_unix & ses->capabilities;
972 bool is_valid:1; /* Do we have a useable root fid */
973 bool file_all_info_is_valid:1;
975 struct kref refcount;
976 struct cifs_fid *fid;
977 struct mutex fid_mutex;
978 struct cifs_tcon *tcon;
979 struct work_struct lease_break;
980 struct smb2_file_all_info file_all_info;
984 * there is one of these for each connection to a resource on a particular
988 struct list_head tcon_list;
990 struct list_head rlist; /* reconnect list */
991 atomic_t num_local_opens; /* num of all opens including disconnected */
992 atomic_t num_remote_opens; /* num of all network opens on server */
993 struct list_head openFileList;
994 spinlock_t open_file_lock; /* protects list above */
995 struct cifs_ses *ses; /* pointer to session associated with */
996 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
997 char *nativeFileSystem;
998 char *password; /* for share-level security */
999 __u32 tid; /* The 4 byte tree id */
1000 __u16 Flags; /* optional support bits */
1001 enum statusEnum tidStatus;
1002 atomic_t num_smbs_sent;
1005 atomic_t num_writes;
1007 atomic_t num_flushes;
1008 atomic_t num_oplock_brks;
1010 atomic_t num_closes;
1011 atomic_t num_deletes;
1012 atomic_t num_mkdirs;
1013 atomic_t num_posixopens;
1014 atomic_t num_posixmkdirs;
1015 atomic_t num_rmdirs;
1016 atomic_t num_renames;
1017 atomic_t num_t2renames;
1018 atomic_t num_ffirst;
1020 atomic_t num_fclose;
1021 atomic_t num_hardlinks;
1022 atomic_t num_symlinks;
1024 atomic_t num_acl_get;
1025 atomic_t num_acl_set;
1028 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
1029 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
1033 __u64 bytes_written;
1034 spinlock_t stat_lock; /* protects the two fields above */
1035 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
1036 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1037 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
1038 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
1039 bool pipe:1; /* set if connection to pipe share */
1040 bool print:1; /* set if connection to printer share */
1043 bool nohandlecache:1; /* if strange server resource prob can turn off */
1044 bool seal:1; /* transport encryption for this mounted share */
1045 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1046 for this mount even if server would support */
1047 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1048 bool local_lease:1; /* check leases (only) on local system not remote */
1049 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1050 bool broken_sparse_sup; /* if server or share does not support sparse */
1051 bool need_reconnect:1; /* connection reset, tid now invalid */
1052 bool need_reopen_files:1; /* need to reopen tcon file handles */
1053 bool use_resilient:1; /* use resilient instead of durable handles */
1054 bool use_persistent:1; /* use persistent instead of durable handles */
1055 __le32 capabilities;
1057 __u32 maximal_access;
1058 __u32 vol_serial_number;
1059 __le64 vol_create_time;
1060 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1061 __u32 ss_flags; /* sector size flags */
1062 __u32 perf_sector_size; /* best sector size for perf */
1064 __u32 max_bytes_chunk;
1065 __u32 max_bytes_copy;
1066 #ifdef CONFIG_CIFS_FSCACHE
1067 u64 resource_id; /* server resource id */
1068 struct fscache_cookie *fscache; /* cookie for share */
1070 struct list_head pending_opens; /* list of incomplete opens */
1071 struct cached_fid crfid; /* Cached root fid */
1072 /* BB add field for back pointer to sb struct(s)? */
1073 #ifdef CONFIG_CIFS_DFS_UPCALL
1076 struct list_head ulist; /* cache update list */
1081 * This is a refcounted and timestamped container for a tcon pointer. The
1082 * container holds a tcon reference. It is considered safe to free one of
1083 * these when the tl_count goes to 0. The tl_time is the time of the last
1084 * "get" on the container.
1087 struct rb_node tl_rbnode;
1089 unsigned long tl_flags;
1090 #define TCON_LINK_MASTER 0
1091 #define TCON_LINK_PENDING 1
1092 #define TCON_LINK_IN_TREE 2
1093 unsigned long tl_time;
1095 struct cifs_tcon *tl_tcon;
1098 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1099 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1101 static inline struct cifs_tcon *
1102 tlink_tcon(struct tcon_link *tlink)
1104 return tlink->tl_tcon;
1107 static inline struct tcon_link *
1108 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1110 return cifs_sb->master_tlink;
1113 extern void cifs_put_tlink(struct tcon_link *tlink);
1115 static inline struct tcon_link *
1116 cifs_get_tlink(struct tcon_link *tlink)
1118 if (tlink && !IS_ERR(tlink))
1119 atomic_inc(&tlink->tl_count);
1123 /* This function is always expected to succeed */
1124 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1126 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1128 struct cifs_pending_open {
1129 struct list_head olist;
1130 struct tcon_link *tlink;
1136 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1137 * This is used to track byte stream locks on the file
1139 struct cifsLockInfo {
1140 struct list_head llist; /* pointer to next cifsLockInfo */
1141 struct list_head blist; /* pointer to locks blocked on this */
1142 wait_queue_head_t block_q;
1151 * One of these for each open instance of a file
1153 struct cifs_search_info {
1154 loff_t index_of_last_entry;
1155 __u16 entries_in_buffer;
1158 char *ntwrk_buf_start;
1159 char *srch_entries_start;
1161 const char *presume_name;
1162 unsigned int resume_name_len;
1166 bool smallBuf:1; /* so we know which buf_release function to call */
1169 struct cifs_open_parms {
1170 struct cifs_tcon *tcon;
1171 struct cifs_sb_info *cifs_sb;
1176 struct cifs_fid *fid;
1183 __u64 persistent_fid; /* persist file id for smb2 */
1184 __u64 volatile_fid; /* volatile file id for smb2 */
1185 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1186 __u8 create_guid[16];
1187 struct cifs_pending_open *pending_open;
1189 #ifdef CONFIG_CIFS_DEBUG2
1191 #endif /* CIFS_DEBUG2 */
1195 struct cifs_fid_locks {
1196 struct list_head llist;
1197 struct cifsFileInfo *cfile; /* fid that owns locks */
1198 struct list_head locks; /* locks held by fid above */
1201 struct cifsFileInfo {
1202 /* following two lists are protected by tcon->open_file_lock */
1203 struct list_head tlist; /* pointer to next fid owned by tcon */
1204 struct list_head flist; /* next fid (file instance) for this inode */
1205 /* lock list below protected by cifsi->lock_sem */
1206 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1207 kuid_t uid; /* allows finding which FileInfo structure */
1208 __u32 pid; /* process id who opened file */
1209 struct cifs_fid fid; /* file id from remote */
1210 struct list_head rlist; /* reconnect list */
1211 /* BB add lock scope info here if needed */ ;
1212 /* lock scope id (0 if none) */
1213 struct dentry *dentry;
1214 struct tcon_link *tlink;
1215 unsigned int f_flags;
1216 bool invalidHandle:1; /* file closed via session abend */
1217 bool oplock_break_cancelled:1;
1219 spinlock_t file_info_lock; /* protects four flag/count fields above */
1220 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1221 struct cifs_search_info srch_inf;
1222 struct work_struct oplock_break; /* work for oplock breaks */
1225 struct cifs_io_parms {
1227 __u64 persistent_fid; /* persist file id for smb2 */
1228 __u64 volatile_fid; /* volatile file id for smb2 */
1231 unsigned int length;
1232 struct cifs_tcon *tcon;
1235 struct cifs_aio_ctx {
1236 struct kref refcount;
1237 struct list_head list;
1238 struct mutex aio_mutex;
1239 struct completion done;
1240 struct iov_iter iter;
1242 struct cifsFileInfo *cfile;
1245 unsigned int npages;
1248 unsigned int total_len;
1251 * Indicates if this aio_ctx is for direct_io,
1252 * If yes, iter is a copy of the user passed iov_iter
1257 struct cifs_readdata;
1259 /* asynchronous read support */
1260 struct cifs_readdata {
1261 struct kref refcount;
1262 struct list_head list;
1263 struct completion done;
1264 struct cifsFileInfo *cfile;
1265 struct address_space *mapping;
1266 struct cifs_aio_ctx *ctx;
1269 unsigned int got_bytes;
1272 struct work_struct work;
1273 int (*read_into_pages)(struct TCP_Server_Info *server,
1274 struct cifs_readdata *rdata,
1276 int (*copy_into_pages)(struct TCP_Server_Info *server,
1277 struct cifs_readdata *rdata,
1278 struct iov_iter *iter);
1280 #ifdef CONFIG_CIFS_SMB_DIRECT
1283 unsigned int pagesz;
1284 unsigned int page_offset;
1285 unsigned int tailsz;
1286 struct cifs_credits credits;
1287 unsigned int nr_pages;
1288 struct page **pages;
1291 struct cifs_writedata;
1293 /* asynchronous write support */
1294 struct cifs_writedata {
1295 struct kref refcount;
1296 struct list_head list;
1297 struct completion done;
1298 enum writeback_sync_modes sync_mode;
1299 struct work_struct work;
1300 struct cifsFileInfo *cfile;
1301 struct cifs_aio_ctx *ctx;
1306 #ifdef CONFIG_CIFS_SMB_DIRECT
1309 unsigned int pagesz;
1310 unsigned int page_offset;
1311 unsigned int tailsz;
1312 struct cifs_credits credits;
1313 unsigned int nr_pages;
1314 struct page **pages;
1318 * Take a reference on the file private data. Must be called with
1319 * cfile->file_info_lock held.
1322 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1327 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1328 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1330 #define CIFS_CACHE_READ_FLG 1
1331 #define CIFS_CACHE_HANDLE_FLG 2
1332 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1333 #define CIFS_CACHE_WRITE_FLG 4
1334 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1335 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1337 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1338 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1339 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1342 * One of these for each file inode
1345 struct cifsInodeInfo {
1346 bool can_cache_brlcks;
1347 struct list_head llist; /* locks helb by this inode */
1348 struct rw_semaphore lock_sem; /* protect the fields above */
1349 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1350 struct list_head openFileList;
1351 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1352 unsigned int oplock; /* oplock/lease level we have */
1353 unsigned int epoch; /* used to track lease state changes */
1354 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1355 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1356 #define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1357 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1358 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1359 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1360 unsigned long flags;
1361 spinlock_t writers_lock;
1362 unsigned int writers; /* Number of writers on this inode */
1363 unsigned long time; /* jiffies of last update of inode */
1364 u64 server_eof; /* current file size on server -- protected by i_lock */
1365 u64 uniqueid; /* server inode number */
1366 u64 createtime; /* creation time on server */
1367 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1368 #ifdef CONFIG_CIFS_FSCACHE
1369 struct fscache_cookie *fscache;
1371 struct inode vfs_inode;
1374 static inline struct cifsInodeInfo *
1375 CIFS_I(struct inode *inode)
1377 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1380 static inline struct cifs_sb_info *
1381 CIFS_SB(struct super_block *sb)
1383 return sb->s_fs_info;
1386 static inline struct cifs_sb_info *
1387 CIFS_FILE_SB(struct file *file)
1389 return CIFS_SB(file_inode(file)->i_sb);
1392 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1394 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1401 convert_delimiter(char *path, char delim)
1403 char old_delim, *pos;
1411 while ((pos = strchr(pos, old_delim)))
1415 #define cifs_stats_inc atomic_inc
1417 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1421 spin_lock(&tcon->stat_lock);
1422 tcon->bytes_written += bytes;
1423 spin_unlock(&tcon->stat_lock);
1427 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1430 spin_lock(&tcon->stat_lock);
1431 tcon->bytes_read += bytes;
1432 spin_unlock(&tcon->stat_lock);
1437 * This is the prototype for the mid receive function. This function is for
1438 * receiving the rest of the SMB frame, starting with the WordCount (which is
1439 * just after the MID in struct smb_hdr). Note:
1441 * - This will be called by cifsd, with no locks held.
1442 * - The mid will still be on the pending_mid_q.
1443 * - mid->resp_buf will point to the current buffer.
1445 * Returns zero on a successful receive, or an error. The receive state in
1446 * the TCP_Server_Info will also be updated.
1448 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1449 struct mid_q_entry *mid);
1452 * This is the prototype for the mid callback function. This is called once the
1453 * mid has been received off of the socket. When creating one, take special
1454 * care to avoid deadlocks. Things to bear in mind:
1456 * - it will be called by cifsd, with no locks held
1457 * - the mid will be removed from any lists
1459 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1462 * This is the protopyte for mid handle function. This is called once the mid
1463 * has been recognized after decryption of the message.
1465 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1466 struct mid_q_entry *mid);
1468 /* one of these for every pending CIFS request to the server */
1469 struct mid_q_entry {
1470 struct list_head qhead; /* mids waiting on reply from this server */
1471 struct kref refcount;
1472 struct TCP_Server_Info *server; /* server corresponding to this mid */
1473 __u64 mid; /* multiplex id */
1474 __u16 credits; /* number of credits consumed by this mid */
1475 __u32 pid; /* process id */
1476 __u32 sequence_number; /* for CIFS signing */
1477 unsigned long when_alloc; /* when mid was created */
1478 #ifdef CONFIG_CIFS_STATS2
1479 unsigned long when_sent; /* time when smb send finished */
1480 unsigned long when_received; /* when demux complete (taken off wire) */
1482 mid_receive_t *receive; /* call receive callback */
1483 mid_callback_t *callback; /* call completion callback */
1484 mid_handle_t *handle; /* call handle mid callback */
1485 void *callback_data; /* general purpose pointer for callback */
1486 void *resp_buf; /* pointer to received SMB header */
1487 unsigned int resp_buf_size;
1488 int mid_state; /* wish this were enum but can not pass to wait_event */
1489 unsigned int mid_flags;
1490 __le16 command; /* smb command code */
1491 unsigned int optype; /* operation type */
1492 bool large_buf:1; /* if valid response, is pointer to large buf */
1493 bool multiRsp:1; /* multiple trans2 responses for one request */
1494 bool multiEnd:1; /* both received */
1495 bool decrypted:1; /* decrypted entry */
1498 struct close_cancelled_open {
1499 struct cifs_fid fid;
1500 struct cifs_tcon *tcon;
1501 struct work_struct work;
1504 /* Make code in transport.c a little cleaner by moving
1505 update of optional stats into function below */
1506 #ifdef CONFIG_CIFS_STATS2
1508 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1510 atomic_inc(&server->in_send);
1513 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1515 atomic_dec(&server->in_send);
1518 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1520 atomic_inc(&server->num_waiters);
1523 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1525 atomic_dec(&server->num_waiters);
1528 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1530 mid->when_sent = jiffies;
1533 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1536 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1540 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1544 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1548 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1553 /* for pending dnotify requests */
1554 struct dir_notify_req {
1555 struct list_head lhead;
1562 __u32 filter; /* CompletionFilter (for multishot) */
1567 struct dfs_info3_param {
1568 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1578 * common struct for holding inode info when searching for or updating an
1579 * inode with new info
1582 #define CIFS_FATTR_DFS_REFERRAL 0x1
1583 #define CIFS_FATTR_DELETE_PENDING 0x2
1584 #define CIFS_FATTR_NEED_REVAL 0x4
1585 #define CIFS_FATTR_INO_COLLISION 0x8
1586 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1587 #define CIFS_FATTR_FAKE_ROOT_INO 0x20
1600 unsigned int cf_nlink;
1601 unsigned int cf_dtype;
1602 struct timespec64 cf_atime;
1603 struct timespec64 cf_mtime;
1604 struct timespec64 cf_ctime;
1607 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1610 kfree(param->path_name);
1611 kfree(param->node_name);
1615 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1616 int number_of_items)
1619 if ((number_of_items == 0) || (param == NULL))
1621 for (i = 0; i < number_of_items; i++) {
1622 kfree(param[i].path_name);
1623 kfree(param[i].node_name);
1628 static inline bool is_interrupt_error(int error)
1633 case -ERESTARTNOHAND:
1634 case -ERESTARTNOINTR:
1640 static inline bool is_retryable_error(int error)
1642 if (is_interrupt_error(error) || error == -EAGAIN)
1648 #define MID_REQUEST_ALLOCATED 1
1649 #define MID_REQUEST_SUBMITTED 2
1650 #define MID_RESPONSE_RECEIVED 4
1651 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1652 #define MID_RESPONSE_MALFORMED 0x10
1653 #define MID_SHUTDOWN 0x20
1656 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1657 #define MID_DELETED 2 /* Mid has been dequeued/deleted */
1659 /* Types of response buffer returned from SendReceive2 */
1660 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1661 #define CIFS_SMALL_BUFFER 1
1662 #define CIFS_LARGE_BUFFER 2
1663 #define CIFS_IOVEC 4 /* array of response buffers */
1665 /* Type of Request to SendReceive2 */
1666 #define CIFS_BLOCKING_OP 1 /* operation can block */
1667 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1668 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1669 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1670 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1671 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1673 /* Type of request operation */
1674 #define CIFS_ECHO_OP 0x080 /* echo request */
1675 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1676 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1677 #define CIFS_OP_MASK 0x0380 /* mask request type */
1679 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1680 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1682 /* Security Flags: indicate type of session setup needed */
1683 #define CIFSSEC_MAY_SIGN 0x00001
1684 #define CIFSSEC_MAY_NTLM 0x00002
1685 #define CIFSSEC_MAY_NTLMV2 0x00004
1686 #define CIFSSEC_MAY_KRB5 0x00008
1687 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1688 #define CIFSSEC_MAY_LANMAN 0x00010
1689 #define CIFSSEC_MAY_PLNTXT 0x00020
1691 #define CIFSSEC_MAY_LANMAN 0
1692 #define CIFSSEC_MAY_PLNTXT 0
1693 #endif /* weak passwords */
1694 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1695 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1697 #define CIFSSEC_MUST_SIGN 0x01001
1698 /* note that only one of the following can be set so the
1699 result of setting MUST flags more than once will be to
1700 require use of the stronger protocol */
1701 #define CIFSSEC_MUST_NTLM 0x02002
1702 #define CIFSSEC_MUST_NTLMV2 0x04004
1703 #define CIFSSEC_MUST_KRB5 0x08008
1704 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1705 #define CIFSSEC_MUST_LANMAN 0x10010
1706 #define CIFSSEC_MUST_PLNTXT 0x20020
1707 #ifdef CONFIG_CIFS_UPCALL
1708 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1710 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1712 #else /* do not allow weak pw hash */
1713 #define CIFSSEC_MUST_LANMAN 0
1714 #define CIFSSEC_MUST_PLNTXT 0
1715 #ifdef CONFIG_CIFS_UPCALL
1716 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1718 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1720 #endif /* WEAK_PW_HASH */
1721 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1722 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1724 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1725 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1726 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1728 *****************************************************************
1729 * All constants go here
1730 *****************************************************************
1733 #define UID_HASH (16)
1736 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1737 * following to be declared.
1740 /****************************************************************************
1741 * Locking notes. All updates to global variables and lists should be
1742 * protected by spinlocks or semaphores.
1746 * GlobalMid_Lock protects:
1747 * list operations on pending_mid_q and oplockQ
1748 * updates to XID counters, multiplex id and SMB sequence numbers
1749 * list operations on global DnotifyReqList
1750 * tcp_ses_lock protects:
1751 * list operations on tcp and SMB session lists
1752 * tcon->open_file_lock protects the list of open files hanging off the tcon
1753 * cfile->file_info_lock protects counters and fields in cifs file struct
1754 * f_owner.lock protects certain per file struct operations
1755 * mapping->page_lock protects certain per page operations
1759 * sesSem operations on smb session
1760 * tconSem operations on tree connection
1761 * fh_sem file handle reconnection operations
1763 ****************************************************************************/
1765 #ifdef DECLARE_GLOBALS_HERE
1766 #define GLOBAL_EXTERN
1768 #define GLOBAL_EXTERN extern
1772 * the list of TCP_Server_Info structures, ie each of the sockets
1773 * connecting our client to a distinct server (ip address), is
1774 * chained together by cifs_tcp_ses_list. The list of all our SMB
1775 * sessions (and from that the tree connections) can be found
1776 * by iterating over cifs_tcp_ses_list
1778 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1781 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1782 * tcp session, and the list of tcon's per smb session. It also protects
1783 * the reference counters for the server, smb session, and tcon. Finally,
1784 * changes to the tcon->tidStatus should be done while holding this lock.
1785 * generally the locks should be taken in order tcp_ses_lock before
1786 * tcon->open_file_lock and that before file->file_info_lock since the
1787 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1789 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1791 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1792 /* Outstanding dir notify requests */
1793 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1794 /* DirNotify response queue */
1795 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1796 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1799 * Global transaction id (XID) information
1801 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1802 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1803 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1804 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1805 /* on midQ entries */
1807 * Global counters, updated atomically
1809 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1810 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1811 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1812 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1813 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1815 /* Various Debug counters */
1816 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1817 #ifdef CONFIG_CIFS_STATS2
1818 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1819 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1820 extern unsigned int slow_rsp_threshold; /* number of secs before logging */
1822 GLOBAL_EXTERN atomic_t smBufAllocCount;
1823 GLOBAL_EXTERN atomic_t midCount;
1826 extern bool enable_oplocks; /* enable or disable oplocks */
1827 extern bool lookupCacheEnabled;
1828 extern unsigned int global_secflags; /* if on, session setup sent
1829 with more secure ntlmssp2 challenge/resp */
1830 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1831 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1832 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
1833 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1834 extern unsigned int cifs_min_small; /* min size of small buf pool */
1835 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
1836 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
1838 #ifdef CONFIG_CIFS_ACL
1839 GLOBAL_EXTERN struct rb_root uidtree;
1840 GLOBAL_EXTERN struct rb_root gidtree;
1841 GLOBAL_EXTERN spinlock_t siduidlock;
1842 GLOBAL_EXTERN spinlock_t sidgidlock;
1843 GLOBAL_EXTERN struct rb_root siduidtree;
1844 GLOBAL_EXTERN struct rb_root sidgidtree;
1845 GLOBAL_EXTERN spinlock_t uidsidlock;
1846 GLOBAL_EXTERN spinlock_t gidsidlock;
1847 #endif /* CONFIG_CIFS_ACL */
1849 void cifs_oplock_break(struct work_struct *work);
1851 extern const struct slow_work_ops cifs_oplock_break_ops;
1852 extern struct workqueue_struct *cifsiod_wq;
1853 extern struct workqueue_struct *cifsoplockd_wq;
1854 extern __u32 cifs_lock_secret;
1856 extern mempool_t *cifs_mid_poolp;
1858 /* Operations for different SMB versions */
1859 #define SMB1_VERSION_STRING "1.0"
1860 extern struct smb_version_operations smb1_operations;
1861 extern struct smb_version_values smb1_values;
1862 #define SMB20_VERSION_STRING "2.0"
1863 extern struct smb_version_operations smb20_operations;
1864 extern struct smb_version_values smb20_values;
1865 #define SMB21_VERSION_STRING "2.1"
1866 extern struct smb_version_operations smb21_operations;
1867 extern struct smb_version_values smb21_values;
1868 #define SMBDEFAULT_VERSION_STRING "default"
1869 extern struct smb_version_values smbdefault_values;
1870 #define SMB3ANY_VERSION_STRING "3"
1871 extern struct smb_version_values smb3any_values;
1872 #define SMB30_VERSION_STRING "3.0"
1873 extern struct smb_version_operations smb30_operations;
1874 extern struct smb_version_values smb30_values;
1875 #define SMB302_VERSION_STRING "3.02"
1876 #define ALT_SMB302_VERSION_STRING "3.0.2"
1877 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1878 extern struct smb_version_values smb302_values;
1879 #define SMB311_VERSION_STRING "3.1.1"
1880 #define ALT_SMB311_VERSION_STRING "3.11"
1881 extern struct smb_version_operations smb311_operations;
1882 extern struct smb_version_values smb311_values;
1883 #endif /* _CIFS_GLOB_H */