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>
32 #ifdef CONFIG_CIFS_SMB2
36 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
39 * The sizes of various internal tables and strings
41 #define MAX_UID_INFO 16
42 #define MAX_SES_INFO 2
43 #define MAX_TCON_INFO 4
45 #define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
47 #define CIFS_MIN_RCV_POOL 4
49 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
51 * default attribute cache timeout (jiffies)
53 #define CIFS_DEF_ACTIMEO (1 * HZ)
56 * max attribute cache timeout (jiffies) - 2^30
58 #define CIFS_MAX_ACTIMEO (1 << 30)
61 * MAX_REQ is the maximum number of requests that WE will send
62 * on one socket concurrently.
64 #define CIFS_MAX_REQ 32767
66 #define RFC1001_NAME_LEN 15
67 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
69 /* currently length of NIP6_FMT */
70 #define SERVER_NAME_LENGTH 40
71 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
73 /* SMB echo "timeout" -- FIXME: tunable? */
74 #define SMB_ECHO_INTERVAL (60 * HZ)
78 #ifndef XATTR_DOS_ATTRIB
79 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
83 * CIFS vfs client Status information (based on what we know.)
86 /* associated with each tcp and smb session */
96 Unspecified
= 0, /* not specified */
97 LANMAN
, /* Legacy LANMAN auth */
98 NTLM
, /* Legacy NTLM012 auth with NTLM hash */
99 NTLMv2
, /* Legacy NTLM auth with NTLMv2 hash */
100 RawNTLMSSP
, /* NTLMSSP without SPNEGO, NTLMv2 hash */
101 Kerberos
, /* Kerberos via SPNEGO */
109 /* crypto security descriptor definition */
111 struct shash_desc shash
;
115 /* crypto hashing related structure/fields, not specific to a sec mech */
116 struct cifs_secmech
{
117 struct crypto_shash
*hmacmd5
; /* hmac-md5 hash function */
118 struct crypto_shash
*md5
; /* md5 hash function */
119 struct crypto_shash
*hmacsha256
; /* hmac-sha256 hash function */
120 struct crypto_shash
*cmacaes
; /* block-cipher based MAC function */
121 struct sdesc
*sdeschmacmd5
; /* ctxt to generate ntlmv2 hash, CR1 */
122 struct sdesc
*sdescmd5
; /* ctxt to generate cifs/smb signature */
123 struct sdesc
*sdeschmacsha256
; /* ctxt to generate smb2 signature */
124 struct sdesc
*sdesccmacaes
; /* ctxt to generate smb3 signature */
127 /* per smb session structure/fields */
128 struct ntlmssp_auth
{
129 bool sesskey_per_smbsess
; /* whether session key is per smb session */
130 __u32 client_flags
; /* sent by client in type 1 ntlmsssp exchange */
131 __u32 server_flags
; /* sent by server in type 2 ntlmssp exchange */
132 unsigned char ciphertext
[CIFS_CPHTXT_SIZE
]; /* sent to server */
133 char cryptkey
[CIFS_CRYPTO_KEY_SIZE
]; /* used by ntlmssp */
141 struct cifs_sid osid
;
142 struct cifs_sid gsid
;
143 struct cifs_ntace
*ntaces
;
144 struct cifs_ace
*aces
;
148 *****************************************************************
149 * Except the CIFS PDUs themselves all the
150 * globally interesting structs should go here
151 *****************************************************************
155 * A smb_rqst represents a complete request to be issued to a server. It's
156 * formed by a kvec array, followed by an array of pages. Page data is assumed
157 * to start at the beginning of the first page.
160 struct kvec
*rq_iov
; /* array of kvecs */
161 unsigned int rq_nvec
; /* number of kvecs in array */
162 struct page
**rq_pages
; /* pointer to array of page ptrs */
163 unsigned int rq_npages
; /* number pages in array */
164 unsigned int rq_pagesz
; /* page size to use */
165 unsigned int rq_tailsz
; /* length of last page */
174 #ifdef CONFIG_CIFS_SMB311
181 struct TCP_Server_Info
;
185 struct dfs_info3_param
;
189 struct cifs_readdata
;
190 struct cifs_writedata
;
191 struct cifs_io_parms
;
192 struct cifs_search_info
;
193 struct cifsInodeInfo
;
194 struct cifs_open_parms
;
196 struct smb_version_operations
{
197 int (*send_cancel
)(struct TCP_Server_Info
*, void *,
198 struct mid_q_entry
*);
199 bool (*compare_fids
)(struct cifsFileInfo
*, struct cifsFileInfo
*);
200 /* setup request: allocate mid, sign message */
201 struct mid_q_entry
*(*setup_request
)(struct cifs_ses
*,
203 /* setup async request: allocate mid, sign message */
204 struct mid_q_entry
*(*setup_async_request
)(struct TCP_Server_Info
*,
206 /* check response: verify signature, map error */
207 int (*check_receive
)(struct mid_q_entry
*, struct TCP_Server_Info
*,
209 void (*add_credits
)(struct TCP_Server_Info
*, const unsigned int,
211 void (*set_credits
)(struct TCP_Server_Info
*, const int);
212 int * (*get_credits_field
)(struct TCP_Server_Info
*, const int);
213 unsigned int (*get_credits
)(struct mid_q_entry
*);
214 __u64 (*get_next_mid
)(struct TCP_Server_Info
*);
215 /* data offset from read response message */
216 unsigned int (*read_data_offset
)(char *);
217 /* data length from read response message */
218 unsigned int (*read_data_length
)(char *);
219 /* map smb to linux error */
220 int (*map_error
)(char *, bool);
221 /* find mid corresponding to the response message */
222 struct mid_q_entry
* (*find_mid
)(struct TCP_Server_Info
*, char *);
223 void (*dump_detail
)(void *);
224 void (*clear_stats
)(struct cifs_tcon
*);
225 void (*print_stats
)(struct seq_file
*m
, struct cifs_tcon
*);
226 void (*dump_share_caps
)(struct seq_file
*, struct cifs_tcon
*);
227 /* verify the message */
228 int (*check_message
)(char *, unsigned int);
229 bool (*is_oplock_break
)(char *, struct TCP_Server_Info
*);
230 int (*handle_cancelled_mid
)(char *, struct TCP_Server_Info
*);
231 void (*downgrade_oplock
)(struct TCP_Server_Info
*,
232 struct cifsInodeInfo
*, bool);
233 /* process transaction2 response */
234 bool (*check_trans2
)(struct mid_q_entry
*, struct TCP_Server_Info
*,
236 /* check if we need to negotiate */
237 bool (*need_neg
)(struct TCP_Server_Info
*);
238 /* negotiate to the server */
239 int (*negotiate
)(const unsigned int, struct cifs_ses
*);
240 /* set negotiated write size */
241 unsigned int (*negotiate_wsize
)(struct cifs_tcon
*, struct smb_vol
*);
242 /* set negotiated read size */
243 unsigned int (*negotiate_rsize
)(struct cifs_tcon
*, struct smb_vol
*);
244 /* setup smb sessionn */
245 int (*sess_setup
)(const unsigned int, struct cifs_ses
*,
246 const struct nls_table
*);
247 /* close smb session */
248 int (*logoff
)(const unsigned int, struct cifs_ses
*);
249 /* connect to a server share */
250 int (*tree_connect
)(const unsigned int, struct cifs_ses
*, const char *,
251 struct cifs_tcon
*, const struct nls_table
*);
252 /* close tree connecion */
253 int (*tree_disconnect
)(const unsigned int, struct cifs_tcon
*);
254 /* get DFS referrals */
255 int (*get_dfs_refer
)(const unsigned int, struct cifs_ses
*,
256 const char *, struct dfs_info3_param
**,
257 unsigned int *, const struct nls_table
*, int);
258 /* informational QFS call */
259 void (*qfs_tcon
)(const unsigned int, struct cifs_tcon
*);
260 /* check if a path is accessible or not */
261 int (*is_path_accessible
)(const unsigned int, struct cifs_tcon
*,
262 struct cifs_sb_info
*, const char *);
263 /* query path data from the server */
264 int (*query_path_info
)(const unsigned int, struct cifs_tcon
*,
265 struct cifs_sb_info
*, const char *,
266 FILE_ALL_INFO
*, bool *, bool *);
267 /* query file data from the server */
268 int (*query_file_info
)(const unsigned int, struct cifs_tcon
*,
269 struct cifs_fid
*, FILE_ALL_INFO
*);
270 /* get server index number */
271 int (*get_srv_inum
)(const unsigned int, struct cifs_tcon
*,
272 struct cifs_sb_info
*, const char *,
273 u64
*uniqueid
, FILE_ALL_INFO
*);
274 /* set size by path */
275 int (*set_path_size
)(const unsigned int, struct cifs_tcon
*,
276 const char *, __u64
, struct cifs_sb_info
*, bool);
277 /* set size by file handle */
278 int (*set_file_size
)(const unsigned int, struct cifs_tcon
*,
279 struct cifsFileInfo
*, __u64
, bool);
281 int (*set_file_info
)(struct inode
*, const char *, FILE_BASIC_INFO
*,
283 int (*set_compression
)(const unsigned int, struct cifs_tcon
*,
284 struct cifsFileInfo
*);
285 /* check if we can send an echo or nor */
286 bool (*can_echo
)(struct TCP_Server_Info
*);
287 /* send echo request */
288 int (*echo
)(struct TCP_Server_Info
*);
289 /* create directory */
290 int (*mkdir
)(const unsigned int, struct cifs_tcon
*, const char *,
291 struct cifs_sb_info
*);
292 /* set info on created directory */
293 void (*mkdir_setinfo
)(struct inode
*, const char *,
294 struct cifs_sb_info
*, struct cifs_tcon
*,
296 /* remove directory */
297 int (*rmdir
)(const unsigned int, struct cifs_tcon
*, const char *,
298 struct cifs_sb_info
*);
300 int (*unlink
)(const unsigned int, struct cifs_tcon
*, const char *,
301 struct cifs_sb_info
*);
302 /* open, rename and delete file */
303 int (*rename_pending_delete
)(const char *, struct dentry
*,
305 /* send rename request */
306 int (*rename
)(const unsigned int, struct cifs_tcon
*, const char *,
307 const char *, struct cifs_sb_info
*);
308 /* send create hardlink request */
309 int (*create_hardlink
)(const unsigned int, struct cifs_tcon
*,
310 const char *, const char *,
311 struct cifs_sb_info
*);
312 /* query symlink target */
313 int (*query_symlink
)(const unsigned int, struct cifs_tcon
*,
314 const char *, char **, struct cifs_sb_info
*);
315 /* open a file for non-posix mounts */
316 int (*open
)(const unsigned int, struct cifs_open_parms
*,
317 __u32
*, FILE_ALL_INFO
*);
318 /* set fid protocol-specific info */
319 void (*set_fid
)(struct cifsFileInfo
*, struct cifs_fid
*, __u32
);
321 void (*close
)(const unsigned int, struct cifs_tcon
*,
323 /* send a flush request to the server */
324 int (*flush
)(const unsigned int, struct cifs_tcon
*, struct cifs_fid
*);
325 /* async read from the server */
326 int (*async_readv
)(struct cifs_readdata
*);
327 /* async write to the server */
328 int (*async_writev
)(struct cifs_writedata
*,
329 void (*release
)(struct kref
*));
330 /* sync read from the server */
331 int (*sync_read
)(const unsigned int, struct cifs_fid
*,
332 struct cifs_io_parms
*, unsigned int *, char **,
334 /* sync write to the server */
335 int (*sync_write
)(const unsigned int, struct cifs_fid
*,
336 struct cifs_io_parms
*, unsigned int *, struct kvec
*,
338 /* open dir, start readdir */
339 int (*query_dir_first
)(const unsigned int, struct cifs_tcon
*,
340 const char *, struct cifs_sb_info
*,
341 struct cifs_fid
*, __u16
,
342 struct cifs_search_info
*);
343 /* continue readdir */
344 int (*query_dir_next
)(const unsigned int, struct cifs_tcon
*,
346 __u16
, struct cifs_search_info
*srch_inf
);
348 int (*close_dir
)(const unsigned int, struct cifs_tcon
*,
350 /* calculate a size of SMB message */
351 unsigned int (*calc_smb_size
)(void *);
352 /* check for STATUS_PENDING and process it in a positive case */
353 bool (*is_status_pending
)(char *, struct TCP_Server_Info
*, int);
354 /* check for STATUS_NETWORK_SESSION_EXPIRED */
355 bool (*is_session_expired
)(char *);
356 /* send oplock break response */
357 int (*oplock_response
)(struct cifs_tcon
*, struct cifs_fid
*,
358 struct cifsInodeInfo
*);
359 /* query remote filesystem */
360 int (*queryfs
)(const unsigned int, struct cifs_tcon
*,
362 /* send mandatory brlock to the server */
363 int (*mand_lock
)(const unsigned int, struct cifsFileInfo
*, __u64
,
364 __u64
, __u32
, int, int, bool);
365 /* unlock range of mandatory locks */
366 int (*mand_unlock_range
)(struct cifsFileInfo
*, struct file_lock
*,
368 /* push brlocks from the cache to the server */
369 int (*push_mand_locks
)(struct cifsFileInfo
*);
370 /* get lease key of the inode */
371 void (*get_lease_key
)(struct inode
*, struct cifs_fid
*);
372 /* set lease key of the inode */
373 void (*set_lease_key
)(struct inode
*, struct cifs_fid
*);
374 /* generate new lease key */
375 void (*new_lease_key
)(struct cifs_fid
*);
376 int (*generate_signingkey
)(struct cifs_ses
*);
377 int (*calc_signature
)(struct smb_rqst
*, struct TCP_Server_Info
*);
378 int (*set_integrity
)(const unsigned int, struct cifs_tcon
*tcon
,
379 struct cifsFileInfo
*src_file
);
380 int (*query_mf_symlink
)(unsigned int, struct cifs_tcon
*,
381 struct cifs_sb_info
*, const unsigned char *,
382 char *, unsigned int *);
383 int (*create_mf_symlink
)(unsigned int, struct cifs_tcon
*,
384 struct cifs_sb_info
*, const unsigned char *,
385 char *, unsigned int *);
386 /* if we can do cache read operations */
387 bool (*is_read_op
)(__u32
);
388 /* set oplock level for the inode */
389 void (*set_oplock_level
)(struct cifsInodeInfo
*, __u32
, unsigned int,
391 /* create lease context buffer for CREATE request */
392 char * (*create_lease_buf
)(u8
*, u8
);
393 /* parse lease context buffer and return oplock/epoch info */
394 __u8 (*parse_lease_buf
)(void *, unsigned int *);
395 int (*clone_range
)(const unsigned int, struct cifsFileInfo
*src_file
,
396 struct cifsFileInfo
*target_file
, u64 src_off
, u64 len
,
398 int (*duplicate_extents
)(const unsigned int, struct cifsFileInfo
*src
,
399 struct cifsFileInfo
*target_file
, u64 src_off
, u64 len
,
401 int (*validate_negotiate
)(const unsigned int, struct cifs_tcon
*);
402 ssize_t (*query_all_EAs
)(const unsigned int, struct cifs_tcon
*,
403 const unsigned char *, const unsigned char *, char *,
404 size_t, const struct nls_table
*, int);
405 int (*set_EA
)(const unsigned int, struct cifs_tcon
*, const char *,
406 const char *, const void *, const __u16
,
407 const struct nls_table
*, int);
408 struct cifs_ntsd
* (*get_acl
)(struct cifs_sb_info
*, struct inode
*,
409 const char *, u32
*);
410 struct cifs_ntsd
* (*get_acl_by_fid
)(struct cifs_sb_info
*,
411 const struct cifs_fid
*, u32
*);
412 int (*set_acl
)(struct cifs_ntsd
*, __u32
, struct inode
*, const char *,
414 /* writepages retry size */
415 unsigned int (*wp_retry_size
)(struct inode
*);
416 /* get mtu credits */
417 int (*wait_mtu_credits
)(struct TCP_Server_Info
*, unsigned int,
418 unsigned int *, unsigned int *);
419 /* check if we need to issue closedir */
420 bool (*dir_needs_close
)(struct cifsFileInfo
*);
421 long (*fallocate
)(struct file
*, struct cifs_tcon
*, int, loff_t
,
425 struct smb_version_values
{
426 char *version_string
;
428 __u32 req_capabilities
;
429 __u32 large_lock_type
;
430 __u32 exclusive_lock_type
;
431 __u32 shared_lock_type
;
432 __u32 unlock_lock_type
;
434 size_t max_header_size
;
435 size_t read_rsp_size
;
437 unsigned int cap_unix
;
438 unsigned int cap_nt_find
;
439 unsigned int cap_large_files
;
440 __u16 signing_enabled
;
441 __u16 signing_required
;
442 size_t create_lease_size
;
445 #define HEADER_SIZE(server) (server->vals->header_size)
446 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
453 char *iocharset
; /* local code page for mapping to and from Unicode */
454 char source_rfc1001_name
[RFC1001_NAME_LEN_WITH_NULL
]; /* clnt nb name */
455 char target_rfc1001_name
[RFC1001_NAME_LEN_WITH_NULL
]; /* srvr nb name */
463 enum securityEnum sectype
; /* sectype requested via mnt opts */
464 bool sign
; /* was signing requested via mnt opts? */
472 bool no_psx_acl
:1; /* set if posix acl support should be disabled */
474 bool backupuid_specified
; /* mount option backupuid is specified */
475 bool backupgid_specified
; /* mount option backupgid is specified */
476 bool no_xattr
:1; /* set if xattr (EA) support should be disabled*/
477 bool server_ino
:1; /* use inode numbers from server ie UniqueId */
479 bool strict_io
:1; /* strict cache behavior */
480 bool remap
:1; /* set to remap seven reserved chars in filenames */
481 bool sfu_remap
:1; /* remap seven reserved chars ala SFU */
482 bool posix_paths
:1; /* unset to not ask for posix pathnames. */
485 bool nullauth
:1; /* attempt to authenticate with null user */
486 bool nocase
:1; /* request case insensitive filenames */
487 bool nobrl
:1; /* disable sending byte range locks to srv */
488 bool mand_lock
:1; /* send mandatory not posix byte range lock reqs */
489 bool seal
:1; /* request transport encryption on share */
490 bool nodfs
:1; /* Do not request DFS, even if available */
491 bool local_lease
:1; /* check leases only on local system, not remote */
494 bool nostrictsync
:1; /* do not force expensive SMBflush on every sync */
495 bool fsc
:1; /* enable fscache */
496 bool mfsymlinks
:1; /* use Minshall+French Symlinks */
498 bool rwpidforward
:1; /* pid forward for read/write operations */
502 bool resilient
:1; /* noresilient not required since not fored for CA */
505 bool sockopt_tcp_nodelay
:1;
506 unsigned long actimeo
; /* attribute cache timeout (jiffies) */
507 struct smb_version_operations
*ops
;
508 struct smb_version_values
*vals
;
510 struct sockaddr_storage dstaddr
; /* destination address */
511 struct sockaddr_storage srcaddr
; /* allow binding to a local IP */
512 struct nls_table
*local_nls
;
515 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
516 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
517 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
518 CIFS_MOUNT_MAP_SFM_CHR | \
519 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
520 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
521 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
522 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
523 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
524 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
525 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
527 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
528 MS_NODEV | MS_SYNCHRONOUS)
530 struct cifs_mnt_data
{
531 struct cifs_sb_info
*cifs_sb
;
536 static inline unsigned int
537 get_rfc1002_length(void *buf
)
539 return be32_to_cpu(*((__be32
*)buf
)) & 0xffffff;
543 inc_rfc1001_len(void *buf
, int count
)
545 be32_add_cpu((__be32
*)buf
, count
);
548 struct TCP_Server_Info
{
549 struct list_head tcp_ses_list
;
550 struct list_head smb_ses_list
;
551 int srv_count
; /* reference counter */
552 /* 15 character server name + 0x20 16th byte indicating type = srv */
553 char server_RFC1001_name
[RFC1001_NAME_LEN_WITH_NULL
];
554 struct smb_version_operations
*ops
;
555 struct smb_version_values
*vals
;
556 enum statusEnum tcpStatus
; /* what we think the status is */
557 char *hostname
; /* hostname portion of UNC string */
558 struct socket
*ssocket
;
559 struct sockaddr_storage dstaddr
;
560 struct sockaddr_storage srcaddr
; /* locally bind to this IP */
564 wait_queue_head_t response_q
;
565 wait_queue_head_t request_q
; /* if more than maxmpx to srvr must block*/
566 struct list_head pending_mid_q
;
567 bool noblocksnd
; /* use blocking sendmsg */
568 bool noautotune
; /* do not autotune send buf sizes */
570 int credits
; /* send no more requests at once */
571 unsigned int in_flight
; /* number of requests on the wire to server */
572 spinlock_t req_lock
; /* protect the two values above */
573 struct mutex srv_mutex
;
574 struct task_struct
*tsk
;
575 char server_GUID
[16];
577 bool sign
; /* is signing enabled on this connection? */
578 bool session_estab
; /* mark when very first sess is established */
579 #ifdef CONFIG_CIFS_SMB2
580 int echo_credits
; /* echo reserved slots */
581 int oplock_credits
; /* oplock break reserved slots */
582 bool echoes
:1; /* enable echoes */
583 __u8 client_guid
[SMB2_CLIENT_GUID_SIZE
]; /* Client GUID */
585 u16 dialect
; /* dialect index that server chose */
586 bool oplocks
:1; /* enable oplocks */
587 unsigned int maxReq
; /* Clients should submit no more */
588 /* than maxReq distinct unanswered SMBs to the server when using */
589 /* multiplexed reads or writes */
590 unsigned int maxBuf
; /* maxBuf specifies the maximum */
591 /* message size the server can send or receive for non-raw SMBs */
592 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
593 /* when socket is setup (and during reconnect) before NegProt sent */
594 unsigned int max_rw
; /* maxRw specifies the maximum */
595 /* message size the server can send or receive for */
596 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
597 unsigned int capabilities
; /* selective disabling of caps by smb sess */
598 int timeAdj
; /* Adjust for difference in server time zone in sec */
599 __u64 CurrentMid
; /* multiplex id - rotating counter */
600 char cryptkey
[CIFS_CRYPTO_KEY_SIZE
]; /* used by ntlm, ntlmv2 etc */
601 /* 16th byte of RFC1001 workstation name is always null */
602 char workstation_RFC1001_name
[RFC1001_NAME_LEN_WITH_NULL
];
603 __u32 sequence_number
; /* for signing, protected by srv_mutex */
604 struct session_key session_key
;
605 unsigned long lstrp
; /* when we got last response from this server */
606 struct cifs_secmech secmech
; /* crypto sec mech functs, descriptors */
607 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
608 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
609 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
610 char negflavor
; /* NEGOTIATE response flavor */
611 /* extended security flavors that server supports */
612 bool sec_ntlmssp
; /* supports NTLMSSP */
613 bool sec_kerberosu2u
; /* supports U2U Kerberos */
614 bool sec_kerberos
; /* supports plain Kerberos */
615 bool sec_mskerberos
; /* supports legacy MS Kerberos */
616 bool large_buf
; /* is current buffer large? */
617 struct delayed_work echo
; /* echo ping workqueue job */
618 struct kvec
*iov
; /* reusable kvec array for receives */
619 unsigned int nr_iov
; /* number of kvecs in array */
620 char *smallbuf
; /* pointer to current "small" buffer */
621 char *bigbuf
; /* pointer to current "big" buffer */
622 unsigned int total_read
; /* total amount of data read in this pass */
623 #ifdef CONFIG_CIFS_FSCACHE
624 struct fscache_cookie
*fscache
; /* client index cache cookie */
626 #ifdef CONFIG_CIFS_STATS2
627 atomic_t in_send
; /* requests trying to send */
628 atomic_t num_waiters
; /* blocked waiting to get in sendrecv */
630 #ifdef CONFIG_CIFS_SMB2
631 unsigned int max_read
;
632 unsigned int max_write
;
633 struct delayed_work reconnect
; /* reconnect workqueue job */
634 struct mutex reconnect_mutex
; /* prevent simultaneous reconnects */
635 #endif /* CONFIG_CIFS_SMB2 */
638 static inline unsigned int
639 in_flight(struct TCP_Server_Info
*server
)
642 spin_lock(&server
->req_lock
);
643 num
= server
->in_flight
;
644 spin_unlock(&server
->req_lock
);
649 has_credits(struct TCP_Server_Info
*server
, int *credits
)
652 spin_lock(&server
->req_lock
);
654 spin_unlock(&server
->req_lock
);
659 add_credits(struct TCP_Server_Info
*server
, const unsigned int add
,
662 server
->ops
->add_credits(server
, add
, optype
);
666 add_credits_and_wake_if(struct TCP_Server_Info
*server
, const unsigned int add
,
670 server
->ops
->add_credits(server
, add
, optype
);
671 wake_up(&server
->request_q
);
676 set_credits(struct TCP_Server_Info
*server
, const int val
)
678 server
->ops
->set_credits(server
, val
);
682 get_next_mid64(struct TCP_Server_Info
*server
)
684 return cpu_to_le64(server
->ops
->get_next_mid(server
));
688 get_next_mid(struct TCP_Server_Info
*server
)
690 __u16 mid
= server
->ops
->get_next_mid(server
);
692 * The value in the SMB header should be little endian for easy
693 * on-the-wire decoding.
695 return cpu_to_le16(mid
);
699 get_mid(const struct smb_hdr
*smb
)
701 return le16_to_cpu(smb
->Mid
);
705 compare_mid(__u16 mid
, const struct smb_hdr
*smb
)
707 return mid
== le16_to_cpu(smb
->Mid
);
711 * When the server supports very large reads and writes via POSIX extensions,
712 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
713 * including the RFC1001 length.
715 * Note that this might make for "interesting" allocation problems during
716 * writeback however as we have to allocate an array of pointers for the
717 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
719 * For reads, there is a similar problem as we need to allocate an array
720 * of kvecs to handle the receive, though that should only need to be done
723 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
724 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
727 * When the server doesn't allow large posix writes, only allow a rsize/wsize
728 * of 2^17-1 minus the size of the call header. That allows for a read or
729 * write up to the maximum size described by RFC1002.
731 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
732 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
735 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
736 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
737 * a single wsize request with a single call.
739 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
742 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
743 * those values when posix extensions aren't in force. In actuality here, we
744 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
745 * to be ok with the extra byte even though Windows doesn't send writes that
750 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
752 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
753 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
756 * Macros to allow the TCP_Server_Info->net field and related code to drop out
757 * when CONFIG_NET_NS isn't set.
762 static inline struct net
*cifs_net_ns(struct TCP_Server_Info
*srv
)
767 static inline void cifs_set_net_ns(struct TCP_Server_Info
*srv
, struct net
*net
)
774 static inline struct net
*cifs_net_ns(struct TCP_Server_Info
*srv
)
779 static inline void cifs_set_net_ns(struct TCP_Server_Info
*srv
, struct net
*net
)
786 * Session structure. One of these for each uid session with a particular host
789 struct list_head smb_ses_list
;
790 struct list_head tcon_list
;
791 struct mutex session_mutex
;
792 struct TCP_Server_Info
*server
; /* pointer to server info */
793 int ses_count
; /* reference counter */
794 enum statusEnum status
;
795 unsigned overrideSecFlg
; /* if non-zero override global sec flags */
796 __u16 ipc_tid
; /* special tid for connection to IPC share */
797 char *serverOS
; /* name of operating system underlying server */
798 char *serverNOS
; /* name of network operating system of server */
799 char *serverDomain
; /* security realm of server */
800 __u64 Suid
; /* remote smb uid */
801 kuid_t linux_uid
; /* overriding owner of files on the mount */
802 kuid_t cred_uid
; /* owner of credentials */
803 unsigned int capabilities
;
804 char serverName
[SERVER_NAME_LEN_WITH_NULL
* 2]; /* BB make bigger for
805 TCP names - will ipv6 and sctp addresses fit? */
806 char *user_name
; /* must not be null except during init of sess
807 and after mount option parsing we fill it */
810 struct session_key auth_key
;
811 struct ntlmssp_auth
*ntlmssp
; /* ciphertext, flags, server challenge */
812 enum securityEnum sectype
; /* what security flavor was specified? */
813 bool sign
; /* is signing required? */
814 bool need_reconnect
:1; /* connection reset, uid now invalid */
815 #ifdef CONFIG_CIFS_SMB2
817 char smb3signingkey
[SMB3_SIGN_KEY_SIZE
]; /* for signing smb3 packets */
818 #endif /* CONFIG_CIFS_SMB2 */
822 cap_unix(struct cifs_ses
*ses
)
824 return ses
->server
->vals
->cap_unix
& ses
->capabilities
;
828 * there is one of these for each connection to a resource on a particular
832 struct list_head tcon_list
;
834 struct list_head rlist
; /* reconnect list */
835 struct list_head openFileList
;
836 spinlock_t open_file_lock
; /* protects list above */
837 struct cifs_ses
*ses
; /* pointer to session associated with */
838 char treeName
[MAX_TREE_SIZE
+ 1]; /* UNC name of resource in ASCII */
839 char *nativeFileSystem
;
840 char *password
; /* for share-level security */
841 __u32 tid
; /* The 4 byte tree id */
842 __u16 Flags
; /* optional support bits */
843 enum statusEnum tidStatus
;
844 #ifdef CONFIG_CIFS_STATS
845 atomic_t num_smbs_sent
;
850 atomic_t num_flushes
;
851 atomic_t num_oplock_brks
;
854 atomic_t num_deletes
;
856 atomic_t num_posixopens
;
857 atomic_t num_posixmkdirs
;
859 atomic_t num_renames
;
860 atomic_t num_t2renames
;
864 atomic_t num_hardlinks
;
865 atomic_t num_symlinks
;
867 atomic_t num_acl_get
;
868 atomic_t num_acl_set
;
870 #ifdef CONFIG_CIFS_SMB2
872 atomic_t smb2_com_sent
[NUMBER_OF_SMB2_COMMANDS
];
873 atomic_t smb2_com_failed
[NUMBER_OF_SMB2_COMMANDS
];
875 #endif /* CONFIG_CIFS_SMB2 */
877 #ifdef CONFIG_CIFS_STATS2
878 unsigned long long time_writes
;
879 unsigned long long time_reads
;
880 unsigned long long time_opens
;
881 unsigned long long time_deletes
;
882 unsigned long long time_closes
;
883 unsigned long long time_mkdirs
;
884 unsigned long long time_rmdirs
;
885 unsigned long long time_renames
;
886 unsigned long long time_t2renames
;
887 unsigned long long time_ffirst
;
888 unsigned long long time_fnext
;
889 unsigned long long time_fclose
;
890 #endif /* CONFIG_CIFS_STATS2 */
893 spinlock_t stat_lock
; /* protects the two fields above */
894 #endif /* CONFIG_CIFS_STATS */
895 FILE_SYSTEM_DEVICE_INFO fsDevInfo
;
896 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo
; /* ok if fs name truncated */
897 FILE_SYSTEM_UNIX_INFO fsUnixInfo
;
898 bool ipc
:1; /* set if connection to IPC$ eg for RPC/PIPES */
901 bool seal
:1; /* transport encryption for this mounted share */
902 bool unix_ext
:1; /* if false disable Linux extensions to CIFS protocol
903 for this mount even if server would support */
904 bool local_lease
:1; /* check leases (only) on local system not remote */
905 bool broken_posix_open
; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
906 bool broken_sparse_sup
; /* if server or share does not support sparse */
907 bool need_reconnect
:1; /* connection reset, tid now invalid */
908 bool use_resilient
:1; /* use resilient instead of durable handles */
909 bool use_persistent
:1; /* use persistent instead of durable handles */
910 #ifdef CONFIG_CIFS_SMB2
911 bool print
:1; /* set if connection to printer share */
914 __u32 maximal_access
;
915 __u32 vol_serial_number
;
916 __le64 vol_create_time
;
917 __u32 ss_flags
; /* sector size flags */
918 __u32 perf_sector_size
; /* best sector size for perf */
920 __u32 max_bytes_chunk
;
921 __u32 max_bytes_copy
;
922 #endif /* CONFIG_CIFS_SMB2 */
923 #ifdef CONFIG_CIFS_FSCACHE
924 u64 resource_id
; /* server resource id */
925 struct fscache_cookie
*fscache
; /* cookie for share */
927 struct list_head pending_opens
; /* list of incomplete opens */
928 /* BB add field for back pointer to sb struct(s)? */
932 * This is a refcounted and timestamped container for a tcon pointer. The
933 * container holds a tcon reference. It is considered safe to free one of
934 * these when the tl_count goes to 0. The tl_time is the time of the last
935 * "get" on the container.
938 struct rb_node tl_rbnode
;
940 unsigned long tl_flags
;
941 #define TCON_LINK_MASTER 0
942 #define TCON_LINK_PENDING 1
943 #define TCON_LINK_IN_TREE 2
944 unsigned long tl_time
;
946 struct cifs_tcon
*tl_tcon
;
949 extern struct tcon_link
*cifs_sb_tlink(struct cifs_sb_info
*cifs_sb
);
951 static inline struct cifs_tcon
*
952 tlink_tcon(struct tcon_link
*tlink
)
954 return tlink
->tl_tcon
;
957 extern void cifs_put_tlink(struct tcon_link
*tlink
);
959 static inline struct tcon_link
*
960 cifs_get_tlink(struct tcon_link
*tlink
)
962 if (tlink
&& !IS_ERR(tlink
))
963 atomic_inc(&tlink
->tl_count
);
967 /* This function is always expected to succeed */
968 extern struct cifs_tcon
*cifs_sb_master_tcon(struct cifs_sb_info
*cifs_sb
);
970 #define CIFS_OPLOCK_NO_CHANGE 0xfe
972 struct cifs_pending_open
{
973 struct list_head olist
;
974 struct tcon_link
*tlink
;
980 * This info hangs off the cifsFileInfo structure, pointed to by llist.
981 * This is used to track byte stream locks on the file
983 struct cifsLockInfo
{
984 struct list_head llist
; /* pointer to next cifsLockInfo */
985 struct list_head blist
; /* pointer to locks blocked on this */
986 wait_queue_head_t block_q
;
994 * One of these for each open instance of a file
996 struct cifs_search_info
{
997 loff_t index_of_last_entry
;
998 __u16 entries_in_buffer
;
1001 char *ntwrk_buf_start
;
1002 char *srch_entries_start
;
1004 const char *presume_name
;
1005 unsigned int resume_name_len
;
1009 bool smallBuf
:1; /* so we know which buf_release function to call */
1012 struct cifs_open_parms
{
1013 struct cifs_tcon
*tcon
;
1014 struct cifs_sb_info
*cifs_sb
;
1019 struct cifs_fid
*fid
;
1025 #ifdef CONFIG_CIFS_SMB2
1026 __u64 persistent_fid
; /* persist file id for smb2 */
1027 __u64 volatile_fid
; /* volatile file id for smb2 */
1028 __u8 lease_key
[SMB2_LEASE_KEY_SIZE
]; /* lease key for smb2 */
1029 __u8 create_guid
[16];
1031 struct cifs_pending_open
*pending_open
;
1036 struct cifs_fid_locks
{
1037 struct list_head llist
;
1038 struct cifsFileInfo
*cfile
; /* fid that owns locks */
1039 struct list_head locks
; /* locks held by fid above */
1042 struct cifsFileInfo
{
1043 /* following two lists are protected by tcon->open_file_lock */
1044 struct list_head tlist
; /* pointer to next fid owned by tcon */
1045 struct list_head flist
; /* next fid (file instance) for this inode */
1046 /* lock list below protected by cifsi->lock_sem */
1047 struct cifs_fid_locks
*llist
; /* brlocks held by this fid */
1048 kuid_t uid
; /* allows finding which FileInfo structure */
1049 __u32 pid
; /* process id who opened file */
1050 struct cifs_fid fid
; /* file id from remote */
1051 /* BB add lock scope info here if needed */ ;
1052 /* lock scope id (0 if none) */
1053 struct dentry
*dentry
;
1054 struct tcon_link
*tlink
;
1055 unsigned int f_flags
;
1056 bool invalidHandle
:1; /* file closed via session abend */
1057 bool oplock_break_cancelled
:1;
1059 spinlock_t file_info_lock
; /* protects four flag/count fields above */
1060 struct mutex fh_mutex
; /* prevents reopen race after dead ses*/
1061 struct cifs_search_info srch_inf
;
1062 struct work_struct oplock_break
; /* work for oplock breaks */
1065 struct cifs_io_parms
{
1067 #ifdef CONFIG_CIFS_SMB2
1068 __u64 persistent_fid
; /* persist file id for smb2 */
1069 __u64 volatile_fid
; /* volatile file id for smb2 */
1073 unsigned int length
;
1074 struct cifs_tcon
*tcon
;
1077 struct cifs_readdata
;
1079 /* asynchronous read support */
1080 struct cifs_readdata
{
1081 struct kref refcount
;
1082 struct list_head list
;
1083 struct completion done
;
1084 struct cifsFileInfo
*cfile
;
1085 struct address_space
*mapping
;
1088 unsigned int got_bytes
;
1091 struct work_struct work
;
1092 int (*read_into_pages
)(struct TCP_Server_Info
*server
,
1093 struct cifs_readdata
*rdata
,
1096 unsigned int pagesz
;
1097 unsigned int tailsz
;
1098 unsigned int credits
;
1099 unsigned int nr_pages
;
1100 struct page
*pages
[];
1103 struct cifs_writedata
;
1105 /* asynchronous write support */
1106 struct cifs_writedata
{
1107 struct kref refcount
;
1108 struct list_head list
;
1109 struct completion done
;
1110 enum writeback_sync_modes sync_mode
;
1111 struct work_struct work
;
1112 struct cifsFileInfo
*cfile
;
1117 unsigned int pagesz
;
1118 unsigned int tailsz
;
1119 unsigned int credits
;
1120 unsigned int nr_pages
;
1121 struct page
*pages
[];
1125 * Take a reference on the file private data. Must be called with
1126 * cfile->file_info_lock held.
1129 cifsFileInfo_get_locked(struct cifsFileInfo
*cifs_file
)
1134 struct cifsFileInfo
*cifsFileInfo_get(struct cifsFileInfo
*cifs_file
);
1135 void cifsFileInfo_put(struct cifsFileInfo
*cifs_file
);
1137 #define CIFS_CACHE_READ_FLG 1
1138 #define CIFS_CACHE_HANDLE_FLG 2
1139 #define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
1140 #define CIFS_CACHE_WRITE_FLG 4
1141 #define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1142 #define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
1144 #define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
1145 #define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
1146 #define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1149 * One of these for each file inode
1152 struct cifsInodeInfo
{
1153 bool can_cache_brlcks
;
1154 struct list_head llist
; /* locks helb by this inode */
1155 struct rw_semaphore lock_sem
; /* protect the fields above */
1156 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1157 struct list_head openFileList
;
1158 __u32 cifsAttrs
; /* e.g. DOS archive bit, sparse, compressed, system */
1159 unsigned int oplock
; /* oplock/lease level we have */
1160 unsigned int epoch
; /* used to track lease state changes */
1161 #define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1162 #define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1163 #define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
1164 #define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1165 #define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
1166 #define CIFS_INO_LOCK (5) /* lock bit for synchronization */
1167 unsigned long flags
;
1168 spinlock_t writers_lock
;
1169 unsigned int writers
; /* Number of writers on this inode */
1170 unsigned long time
; /* jiffies of last update of inode */
1171 u64 server_eof
; /* current file size on server -- protected by i_lock */
1172 u64 uniqueid
; /* server inode number */
1173 u64 createtime
; /* creation time on server */
1174 #ifdef CONFIG_CIFS_SMB2
1175 __u8 lease_key
[SMB2_LEASE_KEY_SIZE
]; /* lease key for this inode */
1177 #ifdef CONFIG_CIFS_FSCACHE
1178 struct fscache_cookie
*fscache
;
1180 struct inode vfs_inode
;
1183 static inline struct cifsInodeInfo
*
1184 CIFS_I(struct inode
*inode
)
1186 return container_of(inode
, struct cifsInodeInfo
, vfs_inode
);
1189 static inline struct cifs_sb_info
*
1190 CIFS_SB(struct super_block
*sb
)
1192 return sb
->s_fs_info
;
1195 static inline struct cifs_sb_info
*
1196 CIFS_FILE_SB(struct file
*file
)
1198 return CIFS_SB(file_inode(file
)->i_sb
);
1201 static inline char CIFS_DIR_SEP(const struct cifs_sb_info
*cifs_sb
)
1203 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
)
1210 convert_delimiter(char *path
, char delim
)
1212 char old_delim
, *pos
;
1220 while ((pos
= strchr(pos
, old_delim
)))
1224 #ifdef CONFIG_CIFS_STATS
1225 #define cifs_stats_inc atomic_inc
1227 static inline void cifs_stats_bytes_written(struct cifs_tcon
*tcon
,
1231 spin_lock(&tcon
->stat_lock
);
1232 tcon
->bytes_written
+= bytes
;
1233 spin_unlock(&tcon
->stat_lock
);
1237 static inline void cifs_stats_bytes_read(struct cifs_tcon
*tcon
,
1240 spin_lock(&tcon
->stat_lock
);
1241 tcon
->bytes_read
+= bytes
;
1242 spin_unlock(&tcon
->stat_lock
);
1246 #define cifs_stats_inc(field) do {} while (0)
1247 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1248 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1254 * This is the prototype for the mid receive function. This function is for
1255 * receiving the rest of the SMB frame, starting with the WordCount (which is
1256 * just after the MID in struct smb_hdr). Note:
1258 * - This will be called by cifsd, with no locks held.
1259 * - The mid will still be on the pending_mid_q.
1260 * - mid->resp_buf will point to the current buffer.
1262 * Returns zero on a successful receive, or an error. The receive state in
1263 * the TCP_Server_Info will also be updated.
1265 typedef int (mid_receive_t
)(struct TCP_Server_Info
*server
,
1266 struct mid_q_entry
*mid
);
1269 * This is the prototype for the mid callback function. This is called once the
1270 * mid has been received off of the socket. When creating one, take special
1271 * care to avoid deadlocks. Things to bear in mind:
1273 * - it will be called by cifsd, with no locks held
1274 * - the mid will be removed from any lists
1276 typedef void (mid_callback_t
)(struct mid_q_entry
*mid
);
1278 /* one of these for every pending CIFS request to the server */
1279 struct mid_q_entry
{
1280 struct list_head qhead
; /* mids waiting on reply from this server */
1281 struct TCP_Server_Info
*server
; /* server corresponding to this mid */
1282 __u64 mid
; /* multiplex id */
1283 __u32 pid
; /* process id */
1284 __u32 sequence_number
; /* for CIFS signing */
1285 unsigned long when_alloc
; /* when mid was created */
1286 #ifdef CONFIG_CIFS_STATS2
1287 unsigned long when_sent
; /* time when smb send finished */
1288 unsigned long when_received
; /* when demux complete (taken off wire) */
1290 mid_receive_t
*receive
; /* call receive callback */
1291 mid_callback_t
*callback
; /* call completion callback */
1292 void *callback_data
; /* general purpose pointer for callback */
1293 void *resp_buf
; /* pointer to received SMB header */
1294 int mid_state
; /* wish this were enum but can not pass to wait_event */
1295 unsigned int mid_flags
;
1296 __le16 command
; /* smb command code */
1297 bool large_buf
:1; /* if valid response, is pointer to large buf */
1298 bool multiRsp
:1; /* multiple trans2 responses for one request */
1299 bool multiEnd
:1; /* both received */
1302 struct close_cancelled_open
{
1303 struct cifs_fid fid
;
1304 struct cifs_tcon
*tcon
;
1305 struct work_struct work
;
1308 /* Make code in transport.c a little cleaner by moving
1309 update of optional stats into function below */
1310 #ifdef CONFIG_CIFS_STATS2
1312 static inline void cifs_in_send_inc(struct TCP_Server_Info
*server
)
1314 atomic_inc(&server
->in_send
);
1317 static inline void cifs_in_send_dec(struct TCP_Server_Info
*server
)
1319 atomic_dec(&server
->in_send
);
1322 static inline void cifs_num_waiters_inc(struct TCP_Server_Info
*server
)
1324 atomic_inc(&server
->num_waiters
);
1327 static inline void cifs_num_waiters_dec(struct TCP_Server_Info
*server
)
1329 atomic_dec(&server
->num_waiters
);
1332 static inline void cifs_save_when_sent(struct mid_q_entry
*mid
)
1334 mid
->when_sent
= jiffies
;
1337 static inline void cifs_in_send_inc(struct TCP_Server_Info
*server
)
1340 static inline void cifs_in_send_dec(struct TCP_Server_Info
*server
)
1344 static inline void cifs_num_waiters_inc(struct TCP_Server_Info
*server
)
1348 static inline void cifs_num_waiters_dec(struct TCP_Server_Info
*server
)
1352 static inline void cifs_save_when_sent(struct mid_q_entry
*mid
)
1357 /* for pending dnotify requests */
1358 struct dir_notify_req
{
1359 struct list_head lhead
;
1366 __u32 filter
; /* CompletionFilter (for multishot) */
1371 struct dfs_info3_param
{
1372 int flags
; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1381 * common struct for holding inode info when searching for or updating an
1382 * inode with new info
1385 #define CIFS_FATTR_DFS_REFERRAL 0x1
1386 #define CIFS_FATTR_DELETE_PENDING 0x2
1387 #define CIFS_FATTR_NEED_REVAL 0x4
1388 #define CIFS_FATTR_INO_COLLISION 0x8
1389 #define CIFS_FATTR_UNKNOWN_NLINK 0x10
1402 unsigned int cf_nlink
;
1403 unsigned int cf_dtype
;
1404 struct timespec cf_atime
;
1405 struct timespec cf_mtime
;
1406 struct timespec cf_ctime
;
1409 static inline void free_dfs_info_param(struct dfs_info3_param
*param
)
1412 kfree(param
->path_name
);
1413 kfree(param
->node_name
);
1418 static inline void free_dfs_info_array(struct dfs_info3_param
*param
,
1419 int number_of_items
)
1422 if ((number_of_items
== 0) || (param
== NULL
))
1424 for (i
= 0; i
< number_of_items
; i
++) {
1425 kfree(param
[i
].path_name
);
1426 kfree(param
[i
].node_name
);
1432 #define MID_REQUEST_ALLOCATED 1
1433 #define MID_REQUEST_SUBMITTED 2
1434 #define MID_RESPONSE_RECEIVED 4
1435 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1436 #define MID_RESPONSE_MALFORMED 0x10
1437 #define MID_SHUTDOWN 0x20
1440 #define MID_WAIT_CANCELLED 1 /* Cancelled while waiting for response */
1442 /* Types of response buffer returned from SendReceive2 */
1443 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1444 #define CIFS_SMALL_BUFFER 1
1445 #define CIFS_LARGE_BUFFER 2
1446 #define CIFS_IOVEC 4 /* array of response buffers */
1448 /* Type of Request to SendReceive2 */
1449 #define CIFS_BLOCKING_OP 1 /* operation can block */
1450 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1451 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1452 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1453 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1454 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1456 /* Type of request operation */
1457 #define CIFS_ECHO_OP 0x080 /* echo request */
1458 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1459 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1460 #define CIFS_OP_MASK 0x0380 /* mask request type */
1461 #define CIFS_HAS_CREDITS 0x0400 /* already has credits */
1463 /* Security Flags: indicate type of session setup needed */
1464 #define CIFSSEC_MAY_SIGN 0x00001
1465 #define CIFSSEC_MAY_NTLM 0x00002
1466 #define CIFSSEC_MAY_NTLMV2 0x00004
1467 #define CIFSSEC_MAY_KRB5 0x00008
1468 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1469 #define CIFSSEC_MAY_LANMAN 0x00010
1470 #define CIFSSEC_MAY_PLNTXT 0x00020
1472 #define CIFSSEC_MAY_LANMAN 0
1473 #define CIFSSEC_MAY_PLNTXT 0
1474 #endif /* weak passwords */
1475 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1476 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1478 #define CIFSSEC_MUST_SIGN 0x01001
1479 /* note that only one of the following can be set so the
1480 result of setting MUST flags more than once will be to
1481 require use of the stronger protocol */
1482 #define CIFSSEC_MUST_NTLM 0x02002
1483 #define CIFSSEC_MUST_NTLMV2 0x04004
1484 #define CIFSSEC_MUST_KRB5 0x08008
1485 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1486 #define CIFSSEC_MUST_LANMAN 0x10010
1487 #define CIFSSEC_MUST_PLNTXT 0x20020
1488 #ifdef CONFIG_CIFS_UPCALL
1489 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1491 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1493 #else /* do not allow weak pw hash */
1494 #define CIFSSEC_MUST_LANMAN 0
1495 #define CIFSSEC_MUST_PLNTXT 0
1496 #ifdef CONFIG_CIFS_UPCALL
1497 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1499 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1501 #endif /* WEAK_PW_HASH */
1502 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1503 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1505 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1506 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1507 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1509 *****************************************************************
1510 * All constants go here
1511 *****************************************************************
1514 #define UID_HASH (16)
1517 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1518 * following to be declared.
1521 /****************************************************************************
1522 * Locking notes. All updates to global variables and lists should be
1523 * protected by spinlocks or semaphores.
1527 * GlobalMid_Lock protects:
1528 * list operations on pending_mid_q and oplockQ
1529 * updates to XID counters, multiplex id and SMB sequence numbers
1530 * tcp_ses_lock protects:
1531 * list operations on tcp and SMB session lists
1532 * tcon->open_file_lock protects the list of open files hanging off the tcon
1533 * cfile->file_info_lock protects counters and fields in cifs file struct
1534 * f_owner.lock protects certain per file struct operations
1535 * mapping->page_lock protects certain per page operations
1539 * sesSem operations on smb session
1540 * tconSem operations on tree connection
1541 * fh_sem file handle reconnection operations
1543 ****************************************************************************/
1545 #ifdef DECLARE_GLOBALS_HERE
1546 #define GLOBAL_EXTERN
1548 #define GLOBAL_EXTERN extern
1552 * the list of TCP_Server_Info structures, ie each of the sockets
1553 * connecting our client to a distinct server (ip address), is
1554 * chained together by cifs_tcp_ses_list. The list of all our SMB
1555 * sessions (and from that the tree connections) can be found
1556 * by iterating over cifs_tcp_ses_list
1558 GLOBAL_EXTERN
struct list_head cifs_tcp_ses_list
;
1561 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1562 * tcp session, and the list of tcon's per smb session. It also protects
1563 * the reference counters for the server, smb session, and tcon. Finally,
1564 * changes to the tcon->tidStatus should be done while holding this lock.
1565 * generally the locks should be taken in order tcp_ses_lock before
1566 * tcon->open_file_lock and that before file->file_info_lock since the
1567 * structure order is cifs_socket-->cifs_ses-->cifs_tcon-->cifs_file
1569 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock
;
1571 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1572 /* Outstanding dir notify requests */
1573 GLOBAL_EXTERN
struct list_head GlobalDnotifyReqList
;
1574 /* DirNotify response queue */
1575 GLOBAL_EXTERN
struct list_head GlobalDnotifyRsp_Q
;
1576 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1579 * Global transaction id (XID) information
1581 GLOBAL_EXTERN
unsigned int GlobalCurrentXid
; /* protected by GlobalMid_Sem */
1582 GLOBAL_EXTERN
unsigned int GlobalTotalActiveXid
; /* prot by GlobalMid_Sem */
1583 GLOBAL_EXTERN
unsigned int GlobalMaxActiveXid
; /* prot by GlobalMid_Sem */
1584 GLOBAL_EXTERN spinlock_t GlobalMid_Lock
; /* protects above & list operations */
1585 /* on midQ entries */
1587 * Global counters, updated atomically
1589 GLOBAL_EXTERN atomic_t sesInfoAllocCount
;
1590 GLOBAL_EXTERN atomic_t tconInfoAllocCount
;
1591 GLOBAL_EXTERN atomic_t tcpSesAllocCount
;
1592 GLOBAL_EXTERN atomic_t tcpSesReconnectCount
;
1593 GLOBAL_EXTERN atomic_t tconInfoReconnectCount
;
1595 /* Various Debug counters */
1596 GLOBAL_EXTERN atomic_t bufAllocCount
; /* current number allocated */
1597 #ifdef CONFIG_CIFS_STATS2
1598 GLOBAL_EXTERN atomic_t totBufAllocCount
; /* total allocated over all time */
1599 GLOBAL_EXTERN atomic_t totSmBufAllocCount
;
1601 GLOBAL_EXTERN atomic_t smBufAllocCount
;
1602 GLOBAL_EXTERN atomic_t midCount
;
1605 GLOBAL_EXTERN
bool enable_oplocks
; /* enable or disable oplocks */
1606 GLOBAL_EXTERN
bool lookupCacheEnabled
;
1607 GLOBAL_EXTERN
unsigned int global_secflags
; /* if on, session setup sent
1608 with more secure ntlmssp2 challenge/resp */
1609 GLOBAL_EXTERN
unsigned int sign_CIFS_PDUs
; /* enable smb packet signing */
1610 GLOBAL_EXTERN
bool linuxExtEnabled
;/*enable Linux/Unix CIFS extensions*/
1611 GLOBAL_EXTERN
unsigned int CIFSMaxBufSize
; /* max size not including hdr */
1612 GLOBAL_EXTERN
unsigned int cifs_min_rcv
; /* min size of big ntwrk buf pool */
1613 GLOBAL_EXTERN
unsigned int cifs_min_small
; /* min size of small buf pool */
1614 GLOBAL_EXTERN
unsigned int cifs_max_pending
; /* MAX requests at once to server*/
1616 #ifdef CONFIG_CIFS_ACL
1617 GLOBAL_EXTERN
struct rb_root uidtree
;
1618 GLOBAL_EXTERN
struct rb_root gidtree
;
1619 GLOBAL_EXTERN spinlock_t siduidlock
;
1620 GLOBAL_EXTERN spinlock_t sidgidlock
;
1621 GLOBAL_EXTERN
struct rb_root siduidtree
;
1622 GLOBAL_EXTERN
struct rb_root sidgidtree
;
1623 GLOBAL_EXTERN spinlock_t uidsidlock
;
1624 GLOBAL_EXTERN spinlock_t gidsidlock
;
1625 #endif /* CONFIG_CIFS_ACL */
1627 void cifs_oplock_break(struct work_struct
*work
);
1629 extern const struct slow_work_ops cifs_oplock_break_ops
;
1630 extern struct workqueue_struct
*cifsiod_wq
;
1632 extern mempool_t
*cifs_mid_poolp
;
1634 /* Operations for different SMB versions */
1635 #define SMB1_VERSION_STRING "1.0"
1636 extern struct smb_version_operations smb1_operations
;
1637 extern struct smb_version_values smb1_values
;
1638 #define SMB20_VERSION_STRING "2.0"
1639 extern struct smb_version_operations smb20_operations
;
1640 extern struct smb_version_values smb20_values
;
1641 #define SMB21_VERSION_STRING "2.1"
1642 extern struct smb_version_operations smb21_operations
;
1643 extern struct smb_version_values smb21_values
;
1644 #define SMB30_VERSION_STRING "3.0"
1645 extern struct smb_version_operations smb30_operations
;
1646 extern struct smb_version_values smb30_values
;
1647 #define SMB302_VERSION_STRING "3.02"
1648 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1649 extern struct smb_version_values smb302_values
;
1650 #define SMB311_VERSION_STRING "3.1.1"
1651 #define ALT_SMB311_VERSION_STRING "3.11"
1652 extern struct smb_version_operations smb311_operations
;
1653 extern struct smb_version_values smb311_values
;
1654 #endif /* _CIFS_GLOB_H */