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_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;
220 struct smb_version_operations {
221 int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
222 struct mid_q_entry *);
223 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
224 /* setup request: allocate mid, sign message */
225 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
227 /* setup async request: allocate mid, sign message */
228 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
230 /* check response: verify signature, map error */
231 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
233 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
235 void (*set_credits)(struct TCP_Server_Info *, const int);
236 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
237 unsigned int (*get_credits)(struct mid_q_entry *);
238 __u64 (*get_next_mid)(struct TCP_Server_Info *);
239 void (*revert_current_mid)(struct TCP_Server_Info *server,
240 const unsigned int val);
241 /* data offset from read response message */
242 unsigned int (*read_data_offset)(char *);
244 * Data length from read response message
245 * When in_remaining is true, the returned data length is in
246 * message field DataRemaining for out-of-band data read (e.g through
247 * Memory Registration RDMA write in SMBD).
248 * Otherwise, the returned data length is in message field DataLength.
250 unsigned int (*read_data_length)(char *, bool in_remaining);
251 /* map smb to linux error */
252 int (*map_error)(char *, bool);
253 /* find mid corresponding to the response message */
254 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
255 void (*dump_detail)(void *buf, struct TCP_Server_Info *ptcp_info);
256 void (*clear_stats)(struct cifs_tcon *);
257 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
258 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
259 /* verify the message */
260 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
261 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
262 int (*handle_cancelled_mid)(char *, struct TCP_Server_Info *);
263 void (*downgrade_oplock)(struct TCP_Server_Info *,
264 struct cifsInodeInfo *, bool);
265 /* process transaction2 response */
266 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
268 /* check if we need to negotiate */
269 bool (*need_neg)(struct TCP_Server_Info *);
270 /* negotiate to the server */
271 int (*negotiate)(const unsigned int, struct cifs_ses *);
272 /* set negotiated write size */
273 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
274 /* set negotiated read size */
275 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
276 /* setup smb sessionn */
277 int (*sess_setup)(const unsigned int, struct cifs_ses *,
278 const struct nls_table *);
279 /* close smb session */
280 int (*logoff)(const unsigned int, struct cifs_ses *);
281 /* connect to a server share */
282 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
283 struct cifs_tcon *, const struct nls_table *);
284 /* close tree connecion */
285 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
286 /* get DFS referrals */
287 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
288 const char *, struct dfs_info3_param **,
289 unsigned int *, const struct nls_table *, int);
290 /* informational QFS call */
291 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
292 /* check if a path is accessible or not */
293 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
294 struct cifs_sb_info *, const char *);
295 /* query path data from the server */
296 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
297 struct cifs_sb_info *, const char *,
298 FILE_ALL_INFO *, bool *, bool *);
299 /* query file data from the server */
300 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
301 struct cifs_fid *, FILE_ALL_INFO *);
302 /* get server index number */
303 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
304 struct cifs_sb_info *, const char *,
305 u64 *uniqueid, FILE_ALL_INFO *);
306 /* set size by path */
307 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
308 const char *, __u64, struct cifs_sb_info *, bool);
309 /* set size by file handle */
310 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
311 struct cifsFileInfo *, __u64, bool);
313 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
315 int (*set_compression)(const unsigned int, struct cifs_tcon *,
316 struct cifsFileInfo *);
317 /* check if we can send an echo or nor */
318 bool (*can_echo)(struct TCP_Server_Info *);
319 /* send echo request */
320 int (*echo)(struct TCP_Server_Info *);
321 /* create directory */
322 int (*posix_mkdir)(const unsigned int xid, struct inode *inode,
323 umode_t mode, struct cifs_tcon *tcon,
324 const char *full_path,
325 struct cifs_sb_info *cifs_sb);
326 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
327 struct cifs_sb_info *);
328 /* set info on created directory */
329 void (*mkdir_setinfo)(struct inode *, const char *,
330 struct cifs_sb_info *, struct cifs_tcon *,
332 /* remove directory */
333 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
334 struct cifs_sb_info *);
336 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
337 struct cifs_sb_info *);
338 /* open, rename and delete file */
339 int (*rename_pending_delete)(const char *, struct dentry *,
341 /* send rename request */
342 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
343 const char *, struct cifs_sb_info *);
344 /* send create hardlink request */
345 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
346 const char *, const char *,
347 struct cifs_sb_info *);
348 /* query symlink target */
349 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
350 const char *, char **, struct cifs_sb_info *);
351 /* open a file for non-posix mounts */
352 int (*open)(const unsigned int, struct cifs_open_parms *,
353 __u32 *, FILE_ALL_INFO *);
354 /* set fid protocol-specific info */
355 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
357 void (*close)(const unsigned int, struct cifs_tcon *,
359 /* send a flush request to the server */
360 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
361 /* async read from the server */
362 int (*async_readv)(struct cifs_readdata *);
363 /* async write to the server */
364 int (*async_writev)(struct cifs_writedata *,
365 void (*release)(struct kref *));
366 /* sync read from the server */
367 int (*sync_read)(const unsigned int, struct cifs_fid *,
368 struct cifs_io_parms *, unsigned int *, char **,
370 /* sync write to the server */
371 int (*sync_write)(const unsigned int, struct cifs_fid *,
372 struct cifs_io_parms *, unsigned int *, struct kvec *,
374 /* open dir, start readdir */
375 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
376 const char *, struct cifs_sb_info *,
377 struct cifs_fid *, __u16,
378 struct cifs_search_info *);
379 /* continue readdir */
380 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
382 __u16, struct cifs_search_info *srch_inf);
384 int (*close_dir)(const unsigned int, struct cifs_tcon *,
386 /* calculate a size of SMB message */
387 unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
388 /* check for STATUS_PENDING and process it in a positive case */
389 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
390 /* check for STATUS_NETWORK_SESSION_EXPIRED */
391 bool (*is_session_expired)(char *);
392 /* send oplock break response */
393 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
394 struct cifsInodeInfo *);
395 /* query remote filesystem */
396 int (*queryfs)(const unsigned int, struct cifs_tcon *,
398 /* send mandatory brlock to the server */
399 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
400 __u64, __u32, int, int, bool);
401 /* unlock range of mandatory locks */
402 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
404 /* push brlocks from the cache to the server */
405 int (*push_mand_locks)(struct cifsFileInfo *);
406 /* get lease key of the inode */
407 void (*get_lease_key)(struct inode *, struct cifs_fid *);
408 /* set lease key of the inode */
409 void (*set_lease_key)(struct inode *, struct cifs_fid *);
410 /* generate new lease key */
411 void (*new_lease_key)(struct cifs_fid *);
412 int (*generate_signingkey)(struct cifs_ses *);
413 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
414 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
415 struct cifsFileInfo *src_file);
416 int (*enum_snapshots)(const unsigned int xid, struct cifs_tcon *tcon,
417 struct cifsFileInfo *src_file, void __user *);
418 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
419 struct cifs_sb_info *, const unsigned char *,
420 char *, unsigned int *);
421 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
422 struct cifs_sb_info *, const unsigned char *,
423 char *, unsigned int *);
424 /* if we can do cache read operations */
425 bool (*is_read_op)(__u32);
426 /* set oplock level for the inode */
427 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
429 /* create lease context buffer for CREATE request */
430 char * (*create_lease_buf)(u8 *lease_key, u8 oplock);
431 /* parse lease context buffer and return oplock/epoch info */
432 __u8 (*parse_lease_buf)(void *buf, unsigned int *epoch, char *lkey);
433 ssize_t (*copychunk_range)(const unsigned int,
434 struct cifsFileInfo *src_file,
435 struct cifsFileInfo *target_file,
436 u64 src_off, u64 len, u64 dest_off);
437 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
438 struct cifsFileInfo *target_file, u64 src_off, u64 len,
440 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
441 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
442 const unsigned char *, const unsigned char *, char *,
443 size_t, struct cifs_sb_info *);
444 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
445 const char *, const void *, const __u16,
446 const struct nls_table *, struct cifs_sb_info *);
447 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
448 const char *, u32 *);
449 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
450 const struct cifs_fid *, u32 *);
451 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
453 /* writepages retry size */
454 unsigned int (*wp_retry_size)(struct inode *);
455 /* get mtu credits */
456 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
457 unsigned int *, unsigned int *);
458 /* check if we need to issue closedir */
459 bool (*dir_needs_close)(struct cifsFileInfo *);
460 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
462 /* init transform request - used for encryption for now */
463 int (*init_transform_rq)(struct TCP_Server_Info *, int num_rqst,
464 struct smb_rqst *, struct smb_rqst *);
465 int (*is_transform_hdr)(void *buf);
466 int (*receive_transform)(struct TCP_Server_Info *,
467 struct mid_q_entry **, char **, int *);
468 enum securityEnum (*select_sectype)(struct TCP_Server_Info *,
470 int (*next_header)(char *);
471 /* ioctl passthrough for query_info */
472 int (*ioctl_query_info)(const unsigned int xid,
473 struct cifs_tcon *tcon,
474 __le16 *path, int is_dir,
478 struct smb_version_values {
479 char *version_string;
481 __u32 req_capabilities;
482 __u32 large_lock_type;
483 __u32 exclusive_lock_type;
484 __u32 shared_lock_type;
485 __u32 unlock_lock_type;
486 size_t header_preamble_size;
488 size_t max_header_size;
489 size_t read_rsp_size;
491 unsigned int cap_unix;
492 unsigned int cap_nt_find;
493 unsigned int cap_large_files;
494 __u16 signing_enabled;
495 __u16 signing_required;
496 size_t create_lease_size;
499 #define HEADER_SIZE(server) (server->vals->header_size)
500 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
507 char *iocharset; /* local code page for mapping to and from Unicode */
508 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
509 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
517 enum securityEnum sectype; /* sectype requested via mnt opts */
518 bool sign; /* was signing requested via mnt opts? */
522 bool setuidfromacl:1;
527 bool no_psx_acl:1; /* set if posix acl support should be disabled */
529 bool backupuid_specified; /* mount option backupuid is specified */
530 bool backupgid_specified; /* mount option backupgid is specified */
531 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
532 bool server_ino:1; /* use inode numbers from server ie UniqueId */
534 bool strict_io:1; /* strict cache behavior */
535 bool remap:1; /* set to remap seven reserved chars in filenames */
536 bool sfu_remap:1; /* remap seven reserved chars ala SFU */
537 bool posix_paths:1; /* unset to not ask for posix pathnames. */
541 bool nullauth:1; /* attempt to authenticate with null user */
542 bool nocase:1; /* request case insensitive filenames */
543 bool nobrl:1; /* disable sending byte range locks to srv */
544 bool nohandlecache:1; /* disable caching dir handles if srvr probs */
545 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
546 bool seal:1; /* request transport encryption on share */
547 bool nodfs:1; /* Do not request DFS, even if available */
548 bool local_lease:1; /* check leases only on local system, not remote */
551 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
552 bool fsc:1; /* enable fscache */
553 bool mfsymlinks:1; /* use Minshall+French Symlinks */
555 bool rwpidforward:1; /* pid forward for read/write operations */
559 bool resilient:1; /* noresilient not required since not fored for CA */
565 bool sockopt_tcp_nodelay:1;
566 unsigned long actimeo; /* attribute cache timeout (jiffies) */
567 struct smb_version_operations *ops;
568 struct smb_version_values *vals;
570 struct sockaddr_storage dstaddr; /* destination address */
571 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
572 struct nls_table *local_nls;
573 unsigned int echo_interval; /* echo interval in secs */
574 __u64 snapshot_time; /* needed for timewarp tokens */
575 unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
578 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
579 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
580 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
581 CIFS_MOUNT_MAP_SFM_CHR | \
582 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
583 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
584 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
585 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
586 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
587 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
588 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
590 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
591 SB_NODEV | SB_SYNCHRONOUS)
593 struct cifs_mnt_data {
594 struct cifs_sb_info *cifs_sb;
599 static inline unsigned int
600 get_rfc1002_length(void *buf)
602 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
606 inc_rfc1001_len(void *buf, int count)
608 be32_add_cpu((__be32 *)buf, count);
611 struct TCP_Server_Info {
612 struct list_head tcp_ses_list;
613 struct list_head smb_ses_list;
614 int srv_count; /* reference counter */
615 /* 15 character server name + 0x20 16th byte indicating type = srv */
616 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
617 struct smb_version_operations *ops;
618 struct smb_version_values *vals;
619 enum statusEnum tcpStatus; /* what we think the status is */
620 char *hostname; /* hostname portion of UNC string */
621 struct socket *ssocket;
622 struct sockaddr_storage dstaddr;
623 struct sockaddr_storage srcaddr; /* locally bind to this IP */
627 wait_queue_head_t response_q;
628 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
629 struct list_head pending_mid_q;
630 bool noblocksnd; /* use blocking sendmsg */
631 bool noautotune; /* do not autotune send buf sizes */
633 unsigned int credits; /* send no more requests at once */
634 unsigned int max_credits; /* can override large 32000 default at mnt */
635 unsigned int in_flight; /* number of requests on the wire to server */
636 spinlock_t req_lock; /* protect the two values above */
637 struct mutex srv_mutex;
638 struct task_struct *tsk;
639 char server_GUID[16];
641 bool sign; /* is signing enabled on this connection? */
642 bool session_estab; /* mark when very first sess is established */
643 int echo_credits; /* echo reserved slots */
644 int oplock_credits; /* oplock break reserved slots */
645 bool echoes:1; /* enable echoes */
646 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
647 u16 dialect; /* dialect index that server chose */
648 bool oplocks:1; /* enable oplocks */
649 unsigned int maxReq; /* Clients should submit no more */
650 /* than maxReq distinct unanswered SMBs to the server when using */
651 /* multiplexed reads or writes (for SMB1/CIFS only, not SMB2/SMB3) */
652 unsigned int maxBuf; /* maxBuf specifies the maximum */
653 /* message size the server can send or receive for non-raw SMBs */
654 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
655 /* when socket is setup (and during reconnect) before NegProt sent */
656 unsigned int max_rw; /* maxRw specifies the maximum */
657 /* message size the server can send or receive for */
658 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
659 unsigned int capabilities; /* selective disabling of caps by smb sess */
660 int timeAdj; /* Adjust for difference in server time zone in sec */
661 __u64 CurrentMid; /* multiplex id - rotating counter */
662 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
663 /* 16th byte of RFC1001 workstation name is always null */
664 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
665 __u32 sequence_number; /* for signing, protected by srv_mutex */
666 __u32 reconnect_instance; /* incremented on each reconnect */
667 struct session_key session_key;
668 unsigned long lstrp; /* when we got last response from this server */
669 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
670 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
671 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
672 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
673 char negflavor; /* NEGOTIATE response flavor */
674 /* extended security flavors that server supports */
675 bool sec_ntlmssp; /* supports NTLMSSP */
676 bool sec_kerberosu2u; /* supports U2U Kerberos */
677 bool sec_kerberos; /* supports plain Kerberos */
678 bool sec_mskerberos; /* supports legacy MS Kerberos */
679 bool large_buf; /* is current buffer large? */
680 /* use SMBD connection instead of socket */
682 /* point to the SMBD connection if RDMA is used instead of socket */
683 struct smbd_connection *smbd_conn;
684 struct delayed_work echo; /* echo ping workqueue job */
685 char *smallbuf; /* pointer to current "small" buffer */
686 char *bigbuf; /* pointer to current "big" buffer */
687 /* Total size of this PDU. Only valid from cifs_demultiplex_thread */
688 unsigned int pdu_size;
689 unsigned int total_read; /* total amount of data read in this pass */
690 #ifdef CONFIG_CIFS_FSCACHE
691 struct fscache_cookie *fscache; /* client index cache cookie */
693 #ifdef CONFIG_CIFS_STATS2
694 atomic_t in_send; /* requests trying to send */
695 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
696 atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
698 unsigned int max_read;
699 unsigned int max_write;
701 /* save initital negprot hash */
702 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
703 bool posix_ext_supported;
704 struct delayed_work reconnect; /* reconnect workqueue job */
705 struct mutex reconnect_mutex; /* prevent simultaneous reconnects */
706 unsigned long echo_interval;
709 * Number of targets available for reconnect. The more targets
710 * the more tasks have to wait to let the demultiplex thread
716 static inline unsigned int
717 in_flight(struct TCP_Server_Info *server)
720 spin_lock(&server->req_lock);
721 num = server->in_flight;
722 spin_unlock(&server->req_lock);
727 has_credits(struct TCP_Server_Info *server, int *credits)
730 spin_lock(&server->req_lock);
732 spin_unlock(&server->req_lock);
737 add_credits(struct TCP_Server_Info *server, const unsigned int add,
740 server->ops->add_credits(server, add, optype);
744 add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
748 server->ops->add_credits(server, add, optype);
749 wake_up(&server->request_q);
754 set_credits(struct TCP_Server_Info *server, const int val)
756 server->ops->set_credits(server, val);
760 get_next_mid64(struct TCP_Server_Info *server)
762 return cpu_to_le64(server->ops->get_next_mid(server));
766 get_next_mid(struct TCP_Server_Info *server)
768 __u16 mid = server->ops->get_next_mid(server);
770 * The value in the SMB header should be little endian for easy
771 * on-the-wire decoding.
773 return cpu_to_le16(mid);
777 revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
779 if (server->ops->revert_current_mid)
780 server->ops->revert_current_mid(server, val);
784 revert_current_mid_from_hdr(struct TCP_Server_Info *server,
785 const struct smb2_sync_hdr *shdr)
787 unsigned int num = le16_to_cpu(shdr->CreditCharge);
789 return revert_current_mid(server, num > 0 ? num : 1);
793 get_mid(const struct smb_hdr *smb)
795 return le16_to_cpu(smb->Mid);
799 compare_mid(__u16 mid, const struct smb_hdr *smb)
801 return mid == le16_to_cpu(smb->Mid);
805 * When the server supports very large reads and writes via POSIX extensions,
806 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
807 * including the RFC1001 length.
809 * Note that this might make for "interesting" allocation problems during
810 * writeback however as we have to allocate an array of pointers for the
811 * pages. A 16M write means ~32kb page array with PAGE_SIZE == 4096.
813 * For reads, there is a similar problem as we need to allocate an array
814 * of kvecs to handle the receive, though that should only need to be done
817 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
818 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
821 * When the server doesn't allow large posix writes, only allow a rsize/wsize
822 * of 2^17-1 minus the size of the call header. That allows for a read or
823 * write up to the maximum size described by RFC1002.
825 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
826 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
829 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
830 * pages in a single call. With PAGE_SIZE == 4k, this means we can fill
831 * a single wsize request with a single call.
833 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
834 #define SMB3_DEFAULT_IOSIZE (4 * 1024 * 1024)
837 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
838 * those values when posix extensions aren't in force. In actuality here, we
839 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
840 * to be ok with the extra byte even though Windows doesn't send writes that
845 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
847 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
848 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
851 * Macros to allow the TCP_Server_Info->net field and related code to drop out
852 * when CONFIG_NET_NS isn't set.
857 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
862 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
869 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
874 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
880 struct cifs_server_iface {
882 unsigned int rdma_capable : 1;
883 unsigned int rss_capable : 1;
884 struct sockaddr_storage sockaddr;
888 * Session structure. One of these for each uid session with a particular host
891 struct list_head smb_ses_list;
892 struct list_head tcon_list;
893 struct cifs_tcon *tcon_ipc;
894 struct mutex session_mutex;
895 struct TCP_Server_Info *server; /* pointer to server info */
896 int ses_count; /* reference counter */
897 enum statusEnum status;
898 unsigned overrideSecFlg; /* if non-zero override global sec flags */
899 char *serverOS; /* name of operating system underlying server */
900 char *serverNOS; /* name of network operating system of server */
901 char *serverDomain; /* security realm of server */
902 __u64 Suid; /* remote smb uid */
903 kuid_t linux_uid; /* overriding owner of files on the mount */
904 kuid_t cred_uid; /* owner of credentials */
905 unsigned int capabilities;
906 char serverName[SERVER_NAME_LEN_WITH_NULL];
907 char *user_name; /* must not be null except during init of sess
908 and after mount option parsing we fill it */
911 struct session_key auth_key;
912 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
913 enum securityEnum sectype; /* what security flavor was specified? */
914 bool sign; /* is signing required? */
915 bool need_reconnect:1; /* connection reset, uid now invalid */
918 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
919 __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
920 __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
921 __u8 preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
924 * Network interfaces available on the server this session is
927 * Other channels can be opened by connecting and binding this
928 * session to interfaces from this list.
930 * iface_lock should be taken when accessing any of these fields
932 spinlock_t iface_lock;
933 struct cifs_server_iface *iface_list;
935 unsigned long iface_last_update; /* jiffies */
939 cap_unix(struct cifs_ses *ses)
941 return ses->server->vals->cap_unix & ses->capabilities;
945 bool is_valid:1; /* Do we have a useable root fid */
946 struct kref refcount;
947 struct cifs_fid *fid;
948 struct mutex fid_mutex;
949 struct cifs_tcon *tcon;
950 struct work_struct lease_break;
954 * there is one of these for each connection to a resource on a particular
958 struct list_head tcon_list;
960 struct list_head rlist; /* reconnect list */
961 atomic_t num_local_opens; /* num of all opens including disconnected */
962 atomic_t num_remote_opens; /* num of all network opens on server */
963 struct list_head openFileList;
964 spinlock_t open_file_lock; /* protects list above */
965 struct cifs_ses *ses; /* pointer to session associated with */
966 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
967 char *nativeFileSystem;
968 char *password; /* for share-level security */
969 __u32 tid; /* The 4 byte tree id */
970 __u16 Flags; /* optional support bits */
971 enum statusEnum tidStatus;
972 atomic_t num_smbs_sent;
977 atomic_t num_flushes;
978 atomic_t num_oplock_brks;
981 atomic_t num_deletes;
983 atomic_t num_posixopens;
984 atomic_t num_posixmkdirs;
986 atomic_t num_renames;
987 atomic_t num_t2renames;
991 atomic_t num_hardlinks;
992 atomic_t num_symlinks;
994 atomic_t num_acl_get;
995 atomic_t num_acl_set;
998 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
999 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
1003 __u64 bytes_written;
1004 spinlock_t stat_lock; /* protects the two fields above */
1005 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
1006 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1007 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
1008 bool ipc:1; /* set if connection to IPC$ share (always also pipe) */
1009 bool pipe:1; /* set if connection to pipe share */
1010 bool print:1; /* set if connection to printer share */
1013 bool nohandlecache:1; /* if strange server resource prob can turn off */
1014 bool seal:1; /* transport encryption for this mounted share */
1015 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
1016 for this mount even if server would support */
1017 bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
1018 bool local_lease:1; /* check leases (only) on local system not remote */
1019 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
1020 bool broken_sparse_sup; /* if server or share does not support sparse */
1021 bool need_reconnect:1; /* connection reset, tid now invalid */
1022 bool need_reopen_files:1; /* need to reopen tcon file handles */
1023 bool use_resilient:1; /* use resilient instead of durable handles */
1024 bool use_persistent:1; /* use persistent instead of durable handles */
1025 __le32 capabilities;
1027 __u32 maximal_access;
1028 __u32 vol_serial_number;
1029 __le64 vol_create_time;
1030 __u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
1031 __u32 ss_flags; /* sector size flags */
1032 __u32 perf_sector_size; /* best sector size for perf */
1034 __u32 max_bytes_chunk;
1035 __u32 max_bytes_copy;
1036 #ifdef CONFIG_CIFS_FSCACHE
1037 u64 resource_id; /* server resource id */
1038 struct fscache_cookie *fscache; /* cookie for share */
1040 struct list_head pending_opens; /* list of incomplete opens */
1041 struct cached_fid crfid; /* Cached root fid */
1042 /* BB add field for back pointer to sb struct(s)? */
1043 #ifdef CONFIG_CIFS_DFS_UPCALL
1046 struct list_head ulist; /* cache update list */
1051 * This is a refcounted and timestamped container for a tcon pointer. The
1052 * container holds a tcon reference. It is considered safe to free one of
1053 * these when the tl_count goes to 0. The tl_time is the time of the last
1054 * "get" on the container.
1057 struct rb_node tl_rbnode;
1059 unsigned long tl_flags;
1060 #define TCON_LINK_MASTER 0
1061 #define TCON_LINK_PENDING 1
1062 #define TCON_LINK_IN_TREE 2
1063 unsigned long tl_time;
1065 struct cifs_tcon *tl_tcon;
1068 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
1069 extern void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst);
1071 static inline struct cifs_tcon *
1072 tlink_tcon(struct tcon_link *tlink)
1074 return tlink->tl_tcon;
1077 static inline struct tcon_link *
1078 cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
1080 return cifs_sb->master_tlink;
1083 extern void cifs_put_tlink(struct tcon_link *tlink);
1085 static inline struct tcon_link *
1086 cifs_get_tlink(struct tcon_link *tlink)
1088 if (tlink && !IS_ERR(tlink))
1089 atomic_inc(&tlink->tl_count);
1093 /* This function is always expected to succeed */
1094 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
1096 #define CIFS_OPLOCK_NO_CHANGE 0xfe
1098 struct cifs_pending_open {
1099 struct list_head olist;
1100 struct tcon_link *tlink;
1106 * This info hangs off the cifsFileInfo structure, pointed to by llist.
1107 * This is used to track byte stream locks on the file
1109 struct cifsLockInfo {
1110 struct list_head llist; /* pointer to next cifsLockInfo */
1111 struct list_head blist; /* pointer to locks blocked on this */
1112 wait_queue_head_t block_q;
1121 * One of these for each open instance of a file
1123 struct cifs_search_info {
1124 loff_t index_of_last_entry;
1125 __u16 entries_in_buffer;
1128 char *ntwrk_buf_start;
1129 char *srch_entries_start;
1131 const char *presume_name;
1132 unsigned int resume_name_len;
1136 bool smallBuf:1; /* so we know which buf_release function to call */
1139 struct cifs_open_parms {
1140 struct cifs_tcon *tcon;
1141 struct cifs_sb_info *cifs_sb;
1146 struct cifs_fid *fid;
1153 __u64 persistent_fid; /* persist file id for smb2 */
1154 __u64 volatile_fid; /* volatile file id for smb2 */
1155 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
1156 __u8 create_guid[16];
1157 struct cifs_pending_open *pending_open;
1159 #ifdef CONFIG_CIFS_DEBUG2
1161 #endif /* CIFS_DEBUG2 */
1165 struct cifs_fid_locks {
1166 struct list_head llist;
1167 struct cifsFileInfo *cfile; /* fid that owns locks */
1168 struct list_head locks; /* locks held by fid above */
1171 struct cifsFileInfo {
1172 /* following two lists are protected by tcon->open_file_lock */
1173 struct list_head tlist; /* pointer to next fid owned by tcon */
1174 struct list_head flist; /* next fid (file instance) for this inode */
1175 /* lock list below protected by cifsi->lock_sem */
1176 struct cifs_fid_locks *llist; /* brlocks held by this fid */
1177 kuid_t uid; /* allows finding which FileInfo structure */
1178 __u32 pid; /* process id who opened file */
1179 struct cifs_fid fid; /* file id from remote */
1180 struct list_head rlist; /* reconnect list */
1181 /* BB add lock scope info here if needed */ ;
1182 /* lock scope id (0 if none) */
1183 struct dentry *dentry;
1184 struct tcon_link *tlink;
1185 unsigned int f_flags;
1186 bool invalidHandle:1; /* file closed via session abend */
1187 bool oplock_break_cancelled:1;
1189 spinlock_t file_info_lock; /* protects four flag/count fields above */
1190 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1191 struct cifs_search_info srch_inf;
1192 struct work_struct oplock_break; /* work for oplock breaks */
1195 struct cifs_io_parms {
1197 __u64 persistent_fid; /* persist file id for smb2 */
1198 __u64 volatile_fid; /* volatile file id for smb2 */
1201 unsigned int length;
1202 struct cifs_tcon *tcon;
1205 struct cifs_aio_ctx {
1206 struct kref refcount;
1207 struct list_head list;
1208 struct mutex aio_mutex;
1209 struct completion done;
1210 struct iov_iter iter;
1212 struct cifsFileInfo *cfile;
1215 unsigned int npages;
1218 unsigned int total_len;
1221 * Indicates if this aio_ctx is for direct_io,
1222 * If yes, iter is a copy of the user passed iov_iter
1227 struct cifs_readdata;
1229 /* asynchronous read support */
1230 struct cifs_readdata {
1231 struct kref refcount;
1232 struct list_head list;
1233 struct completion done;
1234 struct cifsFileInfo *cfile;
1235 struct address_space *mapping;
1236 struct cifs_aio_ctx *ctx;
1239 unsigned int got_bytes;
1242 struct work_struct work;
1243 int (*read_into_pages)(struct TCP_Server_Info *server,
1244 struct cifs_readdata *rdata,
1246 int (*copy_into_pages)(struct TCP_Server_Info *server,
1247 struct cifs_readdata *rdata,
1248 struct iov_iter *iter);
1250 #ifdef CONFIG_CIFS_SMB_DIRECT
1253 unsigned int pagesz;
1254 unsigned int page_offset;
1255 unsigned int tailsz;
1256 unsigned int credits;
1257 unsigned int nr_pages;
1258 struct page **pages;
1261 struct cifs_writedata;
1263 /* asynchronous write support */
1264 struct cifs_writedata {
1265 struct kref refcount;
1266 struct list_head list;
1267 struct completion done;
1268 enum writeback_sync_modes sync_mode;
1269 struct work_struct work;
1270 struct cifsFileInfo *cfile;
1271 struct cifs_aio_ctx *ctx;
1276 #ifdef CONFIG_CIFS_SMB_DIRECT
1279 unsigned int pagesz;
1280 unsigned int page_offset;
1281 unsigned int tailsz;
1282 unsigned int credits;
1283 unsigned int nr_pages;
1284 struct page **pages;
1288 * Take a reference on the file private data. Must be called with
1289 * cfile->file_info_lock held.
1292 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1297 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1298 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1300 #define CIFS_CACHE_READ_FLG 1
1301 #define CIFS_CACHE_HANDLE_FLG 2
1302 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1303 #define CIFS_CACHE_WRITE_FLG 4
1304 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1305 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1307 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1308 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1309 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1312 * One of these for each file inode
1315 struct cifsInodeInfo {
1316 bool can_cache_brlcks;
1317 struct list_head llist; /* locks helb by this inode */
1318 struct rw_semaphore lock_sem; /* protect the fields above */
1319 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1320 struct list_head openFileList;
1321 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1322 unsigned int oplock; /* oplock/lease level we have */
1323 unsigned int epoch; /* used to track lease state changes */
1324 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1325 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1326 #define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1327 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1328 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1329 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1330 unsigned long flags;
1331 spinlock_t writers_lock;
1332 unsigned int writers; /* Number of writers on this inode */
1333 unsigned long time; /* jiffies of last update of inode */
1334 u64 server_eof; /* current file size on server -- protected by i_lock */
1335 u64 uniqueid; /* server inode number */
1336 u64 createtime; /* creation time on server */
1337 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1338 #ifdef CONFIG_CIFS_FSCACHE
1339 struct fscache_cookie *fscache;
1341 struct inode vfs_inode;
1344 static inline struct cifsInodeInfo *
1345 CIFS_I(struct inode *inode)
1347 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1350 static inline struct cifs_sb_info *
1351 CIFS_SB(struct super_block *sb)
1353 return sb->s_fs_info;
1356 static inline struct cifs_sb_info *
1357 CIFS_FILE_SB(struct file *file)
1359 return CIFS_SB(file_inode(file)->i_sb);
1362 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1364 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1371 convert_delimiter(char *path, char delim)
1373 char old_delim, *pos;
1381 while ((pos = strchr(pos, old_delim)))
1385 #define cifs_stats_inc atomic_inc
1387 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1391 spin_lock(&tcon->stat_lock);
1392 tcon->bytes_written += bytes;
1393 spin_unlock(&tcon->stat_lock);
1397 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1400 spin_lock(&tcon->stat_lock);
1401 tcon->bytes_read += bytes;
1402 spin_unlock(&tcon->stat_lock);
1407 * This is the prototype for the mid receive function. This function is for
1408 * receiving the rest of the SMB frame, starting with the WordCount (which is
1409 * just after the MID in struct smb_hdr). Note:
1411 * - This will be called by cifsd, with no locks held.
1412 * - The mid will still be on the pending_mid_q.
1413 * - mid->resp_buf will point to the current buffer.
1415 * Returns zero on a successful receive, or an error. The receive state in
1416 * the TCP_Server_Info will also be updated.
1418 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1419 struct mid_q_entry *mid);
1422 * This is the prototype for the mid callback function. This is called once the
1423 * mid has been received off of the socket. When creating one, take special
1424 * care to avoid deadlocks. Things to bear in mind:
1426 * - it will be called by cifsd, with no locks held
1427 * - the mid will be removed from any lists
1429 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1432 * This is the protopyte for mid handle function. This is called once the mid
1433 * has been recognized after decryption of the message.
1435 typedef int (mid_handle_t)(struct TCP_Server_Info *server,
1436 struct mid_q_entry *mid);
1438 /* one of these for every pending CIFS request to the server */
1439 struct mid_q_entry {
1440 struct list_head qhead; /* mids waiting on reply from this server */
1441 struct kref refcount;
1442 struct TCP_Server_Info *server; /* server corresponding to this mid */
1443 __u64 mid; /* multiplex id */
1444 __u16 credits; /* number of credits consumed by this mid */
1445 __u32 pid; /* process id */
1446 __u32 sequence_number; /* for CIFS signing */
1447 unsigned long when_alloc; /* when mid was created */
1448 #ifdef CONFIG_CIFS_STATS2
1449 unsigned long when_sent; /* time when smb send finished */
1450 unsigned long when_received; /* when demux complete (taken off wire) */
1452 mid_receive_t *receive; /* call receive callback */
1453 mid_callback_t *callback; /* call completion callback */
1454 mid_handle_t *handle; /* call handle mid callback */
1455 void *callback_data; /* general purpose pointer for callback */
1456 void *resp_buf; /* pointer to received SMB header */
1457 unsigned int resp_buf_size;
1458 int mid_state; /* wish this were enum but can not pass to wait_event */
1459 unsigned int mid_flags;
1460 __le16 command; /* smb command code */
1461 unsigned int optype; /* operation type */
1462 bool large_buf:1; /* if valid response, is pointer to large buf */
1463 bool multiRsp:1; /* multiple trans2 responses for one request */
1464 bool multiEnd:1; /* both received */
1465 bool decrypted:1; /* decrypted entry */
1468 struct close_cancelled_open {
1469 struct cifs_fid fid;
1470 struct cifs_tcon *tcon;
1471 struct work_struct work;
1474 /* Make code in transport.c a little cleaner by moving
1475 update of optional stats into function below */
1476 #ifdef CONFIG_CIFS_STATS2
1478 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1480 atomic_inc(&server->in_send);
1483 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1485 atomic_dec(&server->in_send);
1488 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1490 atomic_inc(&server->num_waiters);
1493 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1495 atomic_dec(&server->num_waiters);
1498 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1500 mid->when_sent = jiffies;
1503 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1506 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1510 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1514 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1518 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1523 /* for pending dnotify requests */
1524 struct dir_notify_req {
1525 struct list_head lhead;
1532 __u32 filter; /* CompletionFilter (for multishot) */
1537 struct dfs_info3_param {
1538 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1548 * common struct for holding inode info when searching for or updating an
1549 * inode with new info
1552 #define CIFS_FATTR_DFS_REFERRAL 0x1
1553 #define CIFS_FATTR_DELETE_PENDING 0x2
1554 #define CIFS_FATTR_NEED_REVAL 0x4
1555 #define CIFS_FATTR_INO_COLLISION 0x8
1556 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1557 #define CIFS_FATTR_FAKE_ROOT_INO 0x20
1570 unsigned int cf_nlink;
1571 unsigned int cf_dtype;
1572 struct timespec64 cf_atime;
1573 struct timespec64 cf_mtime;
1574 struct timespec64 cf_ctime;
1577 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1580 kfree(param->path_name);
1581 kfree(param->node_name);
1585 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1586 int number_of_items)
1589 if ((number_of_items == 0) || (param == NULL))
1591 for (i = 0; i < number_of_items; i++) {
1592 kfree(param[i].path_name);
1593 kfree(param[i].node_name);
1598 static inline bool is_interrupt_error(int error)
1603 case -ERESTARTNOHAND:
1604 case -ERESTARTNOINTR:
1610 static inline bool is_retryable_error(int error)
1612 if (is_interrupt_error(error) || error == -EAGAIN)
1618 #define MID_REQUEST_ALLOCATED 1
1619 #define MID_REQUEST_SUBMITTED 2
1620 #define MID_RESPONSE_RECEIVED 4
1621 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1622 #define MID_RESPONSE_MALFORMED 0x10
1623 #define MID_SHUTDOWN 0x20
1626 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1627 #define MID_DELETED 2 /* Mid has been dequeued/deleted */
1629 /* Types of response buffer returned from SendReceive2 */
1630 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1631 #define CIFS_SMALL_BUFFER 1
1632 #define CIFS_LARGE_BUFFER 2
1633 #define CIFS_IOVEC 4 /* array of response buffers */
1635 /* Type of Request to SendReceive2 */
1636 #define CIFS_BLOCKING_OP 1 /* operation can block */
1637 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1638 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1639 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1640 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1641 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1643 /* Type of request operation */
1644 #define CIFS_ECHO_OP 0x080 /* echo request */
1645 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1646 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1647 #define CIFS_OP_MASK 0x0380 /* mask request type */
1649 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1650 #define CIFS_TRANSFORM_REQ 0x0800 /* transform request before sending */
1652 /* Security Flags: indicate type of session setup needed */
1653 #define CIFSSEC_MAY_SIGN 0x00001
1654 #define CIFSSEC_MAY_NTLM 0x00002
1655 #define CIFSSEC_MAY_NTLMV2 0x00004
1656 #define CIFSSEC_MAY_KRB5 0x00008
1657 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1658 #define CIFSSEC_MAY_LANMAN 0x00010
1659 #define CIFSSEC_MAY_PLNTXT 0x00020
1661 #define CIFSSEC_MAY_LANMAN 0
1662 #define CIFSSEC_MAY_PLNTXT 0
1663 #endif /* weak passwords */
1664 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1665 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1667 #define CIFSSEC_MUST_SIGN 0x01001
1668 /* note that only one of the following can be set so the
1669 result of setting MUST flags more than once will be to
1670 require use of the stronger protocol */
1671 #define CIFSSEC_MUST_NTLM 0x02002
1672 #define CIFSSEC_MUST_NTLMV2 0x04004
1673 #define CIFSSEC_MUST_KRB5 0x08008
1674 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1675 #define CIFSSEC_MUST_LANMAN 0x10010
1676 #define CIFSSEC_MUST_PLNTXT 0x20020
1677 #ifdef CONFIG_CIFS_UPCALL
1678 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1680 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1682 #else /* do not allow weak pw hash */
1683 #define CIFSSEC_MUST_LANMAN 0
1684 #define CIFSSEC_MUST_PLNTXT 0
1685 #ifdef CONFIG_CIFS_UPCALL
1686 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1688 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1690 #endif /* WEAK_PW_HASH */
1691 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1692 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1694 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1695 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1696 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1698 *****************************************************************
1699 * All constants go here
1700 *****************************************************************
1703 #define UID_HASH (16)
1706 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1707 * following to be declared.
1710 /****************************************************************************
1711 * Locking notes. All updates to global variables and lists should be
1712 * protected by spinlocks or semaphores.
1716 * GlobalMid_Lock protects:
1717 * list operations on pending_mid_q and oplockQ
1718 * updates to XID counters, multiplex id and SMB sequence numbers
1719 * tcp_ses_lock protects:
1720 * list operations on tcp and SMB session lists
1721 * tcon->open_file_lock protects the list of open files hanging off the tcon
1722 * cfile->file_info_lock protects counters and fields in cifs file struct
1723 * f_owner.lock protects certain per file struct operations
1724 * mapping->page_lock protects certain per page operations
1728 * sesSem operations on smb session
1729 * tconSem operations on tree connection
1730 * fh_sem file handle reconnection operations
1732 ****************************************************************************/
1734 #ifdef DECLARE_GLOBALS_HERE
1735 #define GLOBAL_EXTERN
1737 #define GLOBAL_EXTERN extern
1741 * the list of TCP_Server_Info structures, ie each of the sockets
1742 * connecting our client to a distinct server (ip address), is
1743 * chained together by cifs_tcp_ses_list. The list of all our SMB
1744 * sessions (and from that the tree connections) can be found
1745 * by iterating over cifs_tcp_ses_list
1747 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1750 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1751 * tcp session, and the list of tcon's per smb session. It also protects
1752 * the reference counters for the server, smb session, and tcon. Finally,
1753 * changes to the tcon->tidStatus should be done while holding this lock.
1754 * generally the locks should be taken in order tcp_ses_lock before
1755 * tcon->open_file_lock and that before file->file_info_lock since the
1756 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1758 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1760 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1761 /* Outstanding dir notify requests */
1762 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1763 /* DirNotify response queue */
1764 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1765 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1768 * Global transaction id (XID) information
1770 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1771 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1772 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1773 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1774 /* on midQ entries */
1776 * Global counters, updated atomically
1778 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1779 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1780 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1781 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1782 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1784 /* Various Debug counters */
1785 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1786 #ifdef CONFIG_CIFS_STATS2
1787 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1788 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1789 extern unsigned int slow_rsp_threshold; /* number of secs before logging */
1791 GLOBAL_EXTERN atomic_t smBufAllocCount;
1792 GLOBAL_EXTERN atomic_t midCount;
1795 extern bool enable_oplocks; /* enable or disable oplocks */
1796 extern bool lookupCacheEnabled;
1797 extern unsigned int global_secflags; /* if on, session setup sent
1798 with more secure ntlmssp2 challenge/resp */
1799 extern unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1800 extern bool linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1801 extern unsigned int CIFSMaxBufSize; /* max size not including hdr */
1802 extern unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1803 extern unsigned int cifs_min_small; /* min size of small buf pool */
1804 extern unsigned int cifs_max_pending; /* MAX requests at once to server*/
1805 extern bool disable_legacy_dialects; /* forbid vers=1.0 and vers=2.0 mounts */
1807 #ifdef CONFIG_CIFS_ACL
1808 GLOBAL_EXTERN struct rb_root uidtree;
1809 GLOBAL_EXTERN struct rb_root gidtree;
1810 GLOBAL_EXTERN spinlock_t siduidlock;
1811 GLOBAL_EXTERN spinlock_t sidgidlock;
1812 GLOBAL_EXTERN struct rb_root siduidtree;
1813 GLOBAL_EXTERN struct rb_root sidgidtree;
1814 GLOBAL_EXTERN spinlock_t uidsidlock;
1815 GLOBAL_EXTERN spinlock_t gidsidlock;
1816 #endif /* CONFIG_CIFS_ACL */
1818 void cifs_oplock_break(struct work_struct *work);
1820 extern const struct slow_work_ops cifs_oplock_break_ops;
1821 extern struct workqueue_struct *cifsiod_wq;
1822 extern struct workqueue_struct *cifsoplockd_wq;
1823 extern __u32 cifs_lock_secret;
1825 extern mempool_t *cifs_mid_poolp;
1827 /* Operations for different SMB versions */
1828 #define SMB1_VERSION_STRING "1.0"
1829 extern struct smb_version_operations smb1_operations;
1830 extern struct smb_version_values smb1_values;
1831 #define SMB20_VERSION_STRING "2.0"
1832 extern struct smb_version_operations smb20_operations;
1833 extern struct smb_version_values smb20_values;
1834 #define SMB21_VERSION_STRING "2.1"
1835 extern struct smb_version_operations smb21_operations;
1836 extern struct smb_version_values smb21_values;
1837 #define SMBDEFAULT_VERSION_STRING "default"
1838 extern struct smb_version_values smbdefault_values;
1839 #define SMB3ANY_VERSION_STRING "3"
1840 extern struct smb_version_values smb3any_values;
1841 #define SMB30_VERSION_STRING "3.0"
1842 extern struct smb_version_operations smb30_operations;
1843 extern struct smb_version_values smb30_values;
1844 #define SMB302_VERSION_STRING "3.02"
1845 #define ALT_SMB302_VERSION_STRING "3.0.2"
1846 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1847 extern struct smb_version_values smb302_values;
1848 #define SMB311_VERSION_STRING "3.1.1"
1849 #define ALT_SMB311_VERSION_STRING "3.11"
1850 extern struct smb_version_operations smb311_operations;
1851 extern struct smb_version_values smb311_values;
1852 #endif /* _CIFS_GLOB_H */