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 #ifdef CONFIG_CIFS_SMB2
35 #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
38 * The sizes of various internal tables and strings
40 #define MAX_UID_INFO 16
41 #define MAX_SES_INFO 2
42 #define MAX_TCON_INFO 4
44 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
45 #define MAX_SERVER_SIZE 15
46 #define MAX_SHARE_SIZE 80
47 #define MAX_USERNAME_SIZE 256 /* reasonable maximum for current servers */
48 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
50 #define CIFS_MIN_RCV_POOL 4
52 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
54 * default attribute cache timeout (jiffies)
56 #define CIFS_DEF_ACTIMEO (1 * HZ)
59 * max attribute cache timeout (jiffies) - 2^30
61 #define CIFS_MAX_ACTIMEO (1 << 30)
64 * MAX_REQ is the maximum number of requests that WE will send
65 * on one socket concurrently.
67 #define CIFS_MAX_REQ 32767
69 #define RFC1001_NAME_LEN 15
70 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
72 /* currently length of NIP6_FMT */
73 #define SERVER_NAME_LENGTH 40
74 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
76 /* used to define string lengths for reversing unicode strings */
78 /* (max path length + 1 for null) * 2 for unicode */
81 /* SMB echo "timeout" -- FIXME: tunable? */
82 #define SMB_ECHO_INTERVAL (60 * HZ)
86 #ifndef XATTR_DOS_ATTRIB
87 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
91 * CIFS vfs client Status information (based on what we know.)
94 /* associated with each tcp and smb session */
104 Unspecified
= 0, /* not specified */
105 LANMAN
, /* Legacy LANMAN auth */
106 NTLM
, /* Legacy NTLM012 auth with NTLM hash */
107 NTLMv2
, /* Legacy NTLM auth with NTLMv2 hash */
108 RawNTLMSSP
, /* NTLMSSP without SPNEGO, NTLMv2 hash */
109 Kerberos
, /* Kerberos via SPNEGO */
117 /* crypto security descriptor definition */
119 struct shash_desc shash
;
123 /* crypto hashing related structure/fields, not specific to a sec mech */
124 struct cifs_secmech
{
125 struct crypto_shash
*hmacmd5
; /* hmac-md5 hash function */
126 struct crypto_shash
*md5
; /* md5 hash function */
127 struct crypto_shash
*hmacsha256
; /* hmac-sha256 hash function */
128 struct sdesc
*sdeschmacmd5
; /* ctxt to generate ntlmv2 hash, CR1 */
129 struct sdesc
*sdescmd5
; /* ctxt to generate cifs/smb signature */
130 struct sdesc
*sdeschmacsha256
; /* ctxt to generate smb2 signature */
133 /* per smb session structure/fields */
134 struct ntlmssp_auth
{
135 __u32 client_flags
; /* sent by client in type 1 ntlmsssp exchange */
136 __u32 server_flags
; /* sent by server in type 2 ntlmssp exchange */
137 unsigned char ciphertext
[CIFS_CPHTXT_SIZE
]; /* sent to server */
138 char cryptkey
[CIFS_CRYPTO_KEY_SIZE
]; /* used by ntlmssp */
146 struct cifs_sid osid
;
147 struct cifs_sid gsid
;
148 struct cifs_ntace
*ntaces
;
149 struct cifs_ace
*aces
;
153 *****************************************************************
154 * Except the CIFS PDUs themselves all the
155 * globally interesting structs should go here
156 *****************************************************************
160 * A smb_rqst represents a complete request to be issued to a server. It's
161 * formed by a kvec array, followed by an array of pages. Page data is assumed
162 * to start at the beginning of the first page.
165 struct kvec
*rq_iov
; /* array of kvecs */
166 unsigned int rq_nvec
; /* number of kvecs in array */
167 struct page
**rq_pages
; /* pointer to array of page ptrs */
168 unsigned int rq_npages
; /* number pages in array */
169 unsigned int rq_pagesz
; /* page size to use */
170 unsigned int rq_tailsz
; /* length of last page */
182 struct TCP_Server_Info
;
186 struct dfs_info3_param
;
190 struct cifs_readdata
;
191 struct cifs_writedata
;
192 struct cifs_io_parms
;
193 struct cifs_search_info
;
194 struct cifsInodeInfo
;
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 /* verify the message */
227 int (*check_message
)(char *, unsigned int);
228 bool (*is_oplock_break
)(char *, struct TCP_Server_Info
*);
229 /* process transaction2 response */
230 bool (*check_trans2
)(struct mid_q_entry
*, struct TCP_Server_Info
*,
232 /* check if we need to negotiate */
233 bool (*need_neg
)(struct TCP_Server_Info
*);
234 /* negotiate to the server */
235 int (*negotiate
)(const unsigned int, struct cifs_ses
*);
236 /* set negotiated write size */
237 unsigned int (*negotiate_wsize
)(struct cifs_tcon
*, struct smb_vol
*);
238 /* set negotiated read size */
239 unsigned int (*negotiate_rsize
)(struct cifs_tcon
*, struct smb_vol
*);
240 /* setup smb sessionn */
241 int (*sess_setup
)(const unsigned int, struct cifs_ses
*,
242 const struct nls_table
*);
243 /* close smb session */
244 int (*logoff
)(const unsigned int, struct cifs_ses
*);
245 /* connect to a server share */
246 int (*tree_connect
)(const unsigned int, struct cifs_ses
*, const char *,
247 struct cifs_tcon
*, const struct nls_table
*);
248 /* close tree connecion */
249 int (*tree_disconnect
)(const unsigned int, struct cifs_tcon
*);
250 /* get DFS referrals */
251 int (*get_dfs_refer
)(const unsigned int, struct cifs_ses
*,
252 const char *, struct dfs_info3_param
**,
253 unsigned int *, const struct nls_table
*, int);
254 /* informational QFS call */
255 void (*qfs_tcon
)(const unsigned int, struct cifs_tcon
*);
256 /* check if a path is accessible or not */
257 int (*is_path_accessible
)(const unsigned int, struct cifs_tcon
*,
258 struct cifs_sb_info
*, const char *);
259 /* query path data from the server */
260 int (*query_path_info
)(const unsigned int, struct cifs_tcon
*,
261 struct cifs_sb_info
*, const char *,
262 FILE_ALL_INFO
*, bool *);
263 /* query file data from the server */
264 int (*query_file_info
)(const unsigned int, struct cifs_tcon
*,
265 struct cifs_fid
*, FILE_ALL_INFO
*);
266 /* get server index number */
267 int (*get_srv_inum
)(const unsigned int, struct cifs_tcon
*,
268 struct cifs_sb_info
*, const char *,
269 u64
*uniqueid
, FILE_ALL_INFO
*);
270 /* set size by path */
271 int (*set_path_size
)(const unsigned int, struct cifs_tcon
*,
272 const char *, __u64
, struct cifs_sb_info
*, bool);
273 /* set size by file handle */
274 int (*set_file_size
)(const unsigned int, struct cifs_tcon
*,
275 struct cifsFileInfo
*, __u64
, bool);
277 int (*set_file_info
)(struct inode
*, const char *, FILE_BASIC_INFO
*,
279 /* check if we can send an echo or nor */
280 bool (*can_echo
)(struct TCP_Server_Info
*);
281 /* send echo request */
282 int (*echo
)(struct TCP_Server_Info
*);
283 /* create directory */
284 int (*mkdir
)(const unsigned int, struct cifs_tcon
*, const char *,
285 struct cifs_sb_info
*);
286 /* set info on created directory */
287 void (*mkdir_setinfo
)(struct inode
*, const char *,
288 struct cifs_sb_info
*, struct cifs_tcon
*,
290 /* remove directory */
291 int (*rmdir
)(const unsigned int, struct cifs_tcon
*, const char *,
292 struct cifs_sb_info
*);
294 int (*unlink
)(const unsigned int, struct cifs_tcon
*, const char *,
295 struct cifs_sb_info
*);
296 /* open, rename and delete file */
297 int (*rename_pending_delete
)(const char *, struct dentry
*,
299 /* send rename request */
300 int (*rename
)(const unsigned int, struct cifs_tcon
*, const char *,
301 const char *, struct cifs_sb_info
*);
302 /* send create hardlink request */
303 int (*create_hardlink
)(const unsigned int, struct cifs_tcon
*,
304 const char *, const char *,
305 struct cifs_sb_info
*);
306 /* open a file for non-posix mounts */
307 int (*open
)(const unsigned int, struct cifs_tcon
*, const char *, int,
308 int, int, struct cifs_fid
*, __u32
*, FILE_ALL_INFO
*,
309 struct cifs_sb_info
*);
310 /* set fid protocol-specific info */
311 void (*set_fid
)(struct cifsFileInfo
*, struct cifs_fid
*, __u32
);
313 void (*close
)(const unsigned int, struct cifs_tcon
*,
315 /* send a flush request to the server */
316 int (*flush
)(const unsigned int, struct cifs_tcon
*, struct cifs_fid
*);
317 /* async read from the server */
318 int (*async_readv
)(struct cifs_readdata
*);
319 /* async write to the server */
320 int (*async_writev
)(struct cifs_writedata
*);
321 /* sync read from the server */
322 int (*sync_read
)(const unsigned int, struct cifsFileInfo
*,
323 struct cifs_io_parms
*, unsigned int *, char **,
325 /* sync write to the server */
326 int (*sync_write
)(const unsigned int, struct cifsFileInfo
*,
327 struct cifs_io_parms
*, unsigned int *, struct kvec
*,
329 /* open dir, start readdir */
330 int (*query_dir_first
)(const unsigned int, struct cifs_tcon
*,
331 const char *, struct cifs_sb_info
*,
332 struct cifs_fid
*, __u16
,
333 struct cifs_search_info
*);
334 /* continue readdir */
335 int (*query_dir_next
)(const unsigned int, struct cifs_tcon
*,
337 __u16
, struct cifs_search_info
*srch_inf
);
339 int (*close_dir
)(const unsigned int, struct cifs_tcon
*,
341 /* calculate a size of SMB message */
342 unsigned int (*calc_smb_size
)(void *);
343 /* check for STATUS_PENDING and process it in a positive case */
344 bool (*is_status_pending
)(char *, struct TCP_Server_Info
*, int);
345 /* send oplock break response */
346 int (*oplock_response
)(struct cifs_tcon
*, struct cifs_fid
*,
347 struct cifsInodeInfo
*);
348 /* query remote filesystem */
349 int (*queryfs
)(const unsigned int, struct cifs_tcon
*,
351 /* send mandatory brlock to the server */
352 int (*mand_lock
)(const unsigned int, struct cifsFileInfo
*, __u64
,
353 __u64
, __u32
, int, int, bool);
354 /* unlock range of mandatory locks */
355 int (*mand_unlock_range
)(struct cifsFileInfo
*, struct file_lock
*,
357 /* push brlocks from the cache to the server */
358 int (*push_mand_locks
)(struct cifsFileInfo
*);
359 /* get lease key of the inode */
360 void (*get_lease_key
)(struct inode
*, struct cifs_fid
*fid
);
361 /* set lease key of the inode */
362 void (*set_lease_key
)(struct inode
*, struct cifs_fid
*fid
);
363 /* generate new lease key */
364 void (*new_lease_key
)(struct cifs_fid
*fid
);
365 int (*calc_signature
)(struct smb_rqst
*rqst
,
366 struct TCP_Server_Info
*server
);
369 struct smb_version_values
{
370 char *version_string
;
372 __u32 req_capabilities
;
373 __u32 large_lock_type
;
374 __u32 exclusive_lock_type
;
375 __u32 shared_lock_type
;
376 __u32 unlock_lock_type
;
378 size_t max_header_size
;
379 size_t read_rsp_size
;
381 unsigned int cap_unix
;
382 unsigned int cap_nt_find
;
383 unsigned int cap_large_files
;
384 unsigned int oplock_read
;
387 #define HEADER_SIZE(server) (server->vals->header_size)
388 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
395 char *iocharset
; /* local code page for mapping to and from Unicode */
396 char source_rfc1001_name
[RFC1001_NAME_LEN_WITH_NULL
]; /* clnt nb name */
397 char target_rfc1001_name
[RFC1001_NAME_LEN_WITH_NULL
]; /* srvr nb name */
405 enum securityEnum sectype
; /* sectype requested via mnt opts */
406 bool sign
; /* was signing requested via mnt opts? */
414 bool no_psx_acl
:1; /* set if posix acl support should be disabled */
416 bool backupuid_specified
; /* mount option backupuid is specified */
417 bool backupgid_specified
; /* mount option backupgid is specified */
418 bool no_xattr
:1; /* set if xattr (EA) support should be disabled*/
419 bool server_ino
:1; /* use inode numbers from server ie UniqueId */
421 bool strict_io
:1; /* strict cache behavior */
422 bool remap
:1; /* set to remap seven reserved chars in filenames */
423 bool posix_paths
:1; /* unset to not ask for posix pathnames. */
426 bool nullauth
:1; /* attempt to authenticate with null user */
427 bool nocase
:1; /* request case insensitive filenames */
428 bool nobrl
:1; /* disable sending byte range locks to srv */
429 bool mand_lock
:1; /* send mandatory not posix byte range lock reqs */
430 bool seal
:1; /* request transport encryption on share */
431 bool nodfs
:1; /* Do not request DFS, even if available */
432 bool local_lease
:1; /* check leases only on local system, not remote */
435 bool nostrictsync
:1; /* do not force expensive SMBflush on every sync */
436 bool fsc
:1; /* enable fscache */
437 bool mfsymlinks
:1; /* use Minshall+French Symlinks */
439 bool rwpidforward
:1; /* pid forward for read/write operations */
443 bool sockopt_tcp_nodelay
:1;
444 unsigned long actimeo
; /* attribute cache timeout (jiffies) */
445 struct smb_version_operations
*ops
;
446 struct smb_version_values
*vals
;
448 struct sockaddr_storage dstaddr
; /* destination address */
449 struct sockaddr_storage srcaddr
; /* allow binding to a local IP */
450 struct nls_table
*local_nls
;
453 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
454 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
455 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
456 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
457 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
458 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
459 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
460 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
461 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
462 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
464 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
465 MS_NODEV | MS_SYNCHRONOUS)
467 struct cifs_mnt_data
{
468 struct cifs_sb_info
*cifs_sb
;
473 static inline unsigned int
474 get_rfc1002_length(void *buf
)
476 return be32_to_cpu(*((__be32
*)buf
));
480 inc_rfc1001_len(void *buf
, int count
)
482 be32_add_cpu((__be32
*)buf
, count
);
485 struct TCP_Server_Info
{
486 struct list_head tcp_ses_list
;
487 struct list_head smb_ses_list
;
488 int srv_count
; /* reference counter */
489 /* 15 character server name + 0x20 16th byte indicating type = srv */
490 char server_RFC1001_name
[RFC1001_NAME_LEN_WITH_NULL
];
491 struct smb_version_operations
*ops
;
492 struct smb_version_values
*vals
;
493 enum statusEnum tcpStatus
; /* what we think the status is */
494 char *hostname
; /* hostname portion of UNC string */
495 struct socket
*ssocket
;
496 struct sockaddr_storage dstaddr
;
497 struct sockaddr_storage srcaddr
; /* locally bind to this IP */
501 wait_queue_head_t response_q
;
502 wait_queue_head_t request_q
; /* if more than maxmpx to srvr must block*/
503 struct list_head pending_mid_q
;
504 bool noblocksnd
; /* use blocking sendmsg */
505 bool noautotune
; /* do not autotune send buf sizes */
507 int credits
; /* send no more requests at once */
508 unsigned int in_flight
; /* number of requests on the wire to server */
509 spinlock_t req_lock
; /* protect the two values above */
510 struct mutex srv_mutex
;
511 struct task_struct
*tsk
;
512 char server_GUID
[16];
514 bool sign
; /* is signing enabled on this connection? */
515 bool session_estab
; /* mark when very first sess is established */
516 #ifdef CONFIG_CIFS_SMB2
517 int echo_credits
; /* echo reserved slots */
518 int oplock_credits
; /* oplock break reserved slots */
519 bool echoes
:1; /* enable echoes */
521 u16 dialect
; /* dialect index that server chose */
522 bool oplocks
:1; /* enable oplocks */
523 unsigned int maxReq
; /* Clients should submit no more */
524 /* than maxReq distinct unanswered SMBs to the server when using */
525 /* multiplexed reads or writes */
526 unsigned int maxBuf
; /* maxBuf specifies the maximum */
527 /* message size the server can send or receive for non-raw SMBs */
528 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
529 /* when socket is setup (and during reconnect) before NegProt sent */
530 unsigned int max_rw
; /* maxRw specifies the maximum */
531 /* message size the server can send or receive for */
532 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
533 unsigned int max_vcs
; /* maximum number of smb sessions, at least
534 those that can be specified uniquely with
536 unsigned int capabilities
; /* selective disabling of caps by smb sess */
537 int timeAdj
; /* Adjust for difference in server time zone in sec */
538 __u64 CurrentMid
; /* multiplex id - rotating counter */
539 char cryptkey
[CIFS_CRYPTO_KEY_SIZE
]; /* used by ntlm, ntlmv2 etc */
540 /* 16th byte of RFC1001 workstation name is always null */
541 char workstation_RFC1001_name
[RFC1001_NAME_LEN_WITH_NULL
];
542 __u32 sequence_number
; /* for signing, protected by srv_mutex */
543 struct session_key session_key
;
544 unsigned long lstrp
; /* when we got last response from this server */
545 struct cifs_secmech secmech
; /* crypto sec mech functs, descriptors */
546 #define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
547 #define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
548 #define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
549 char negflavor
; /* NEGOTIATE response flavor */
550 /* extended security flavors that server supports */
551 bool sec_ntlmssp
; /* supports NTLMSSP */
552 bool sec_kerberosu2u
; /* supports U2U Kerberos */
553 bool sec_kerberos
; /* supports plain Kerberos */
554 bool sec_mskerberos
; /* supports legacy MS Kerberos */
555 bool large_buf
; /* is current buffer large? */
556 struct delayed_work echo
; /* echo ping workqueue job */
557 struct kvec
*iov
; /* reusable kvec array for receives */
558 unsigned int nr_iov
; /* number of kvecs in array */
559 char *smallbuf
; /* pointer to current "small" buffer */
560 char *bigbuf
; /* pointer to current "big" buffer */
561 unsigned int total_read
; /* total amount of data read in this pass */
562 #ifdef CONFIG_CIFS_FSCACHE
563 struct fscache_cookie
*fscache
; /* client index cache cookie */
565 #ifdef CONFIG_CIFS_STATS2
566 atomic_t in_send
; /* requests trying to send */
567 atomic_t num_waiters
; /* blocked waiting to get in sendrecv */
569 #ifdef CONFIG_CIFS_SMB2
570 unsigned int max_read
;
571 unsigned int max_write
;
572 #endif /* CONFIG_CIFS_SMB2 */
575 static inline unsigned int
576 in_flight(struct TCP_Server_Info
*server
)
579 spin_lock(&server
->req_lock
);
580 num
= server
->in_flight
;
581 spin_unlock(&server
->req_lock
);
586 has_credits(struct TCP_Server_Info
*server
, int *credits
)
589 spin_lock(&server
->req_lock
);
591 spin_unlock(&server
->req_lock
);
596 add_credits(struct TCP_Server_Info
*server
, const unsigned int add
,
599 server
->ops
->add_credits(server
, add
, optype
);
603 set_credits(struct TCP_Server_Info
*server
, const int val
)
605 server
->ops
->set_credits(server
, val
);
609 get_next_mid(struct TCP_Server_Info
*server
)
611 return server
->ops
->get_next_mid(server
);
615 * When the server supports very large reads and writes via POSIX extensions,
616 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
617 * including the RFC1001 length.
619 * Note that this might make for "interesting" allocation problems during
620 * writeback however as we have to allocate an array of pointers for the
621 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
623 * For reads, there is a similar problem as we need to allocate an array
624 * of kvecs to handle the receive, though that should only need to be done
627 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
628 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
631 * When the server doesn't allow large posix writes, only allow a rsize/wsize
632 * of 2^17-1 minus the size of the call header. That allows for a read or
633 * write up to the maximum size described by RFC1002.
635 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
636 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
639 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
640 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
641 * a single wsize request with a single call.
643 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
646 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
647 * those values when posix extensions aren't in force. In actuality here, we
648 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
649 * to be ok with the extra byte even though Windows doesn't send writes that
654 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
656 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
657 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
660 * Macros to allow the TCP_Server_Info->net field and related code to drop out
661 * when CONFIG_NET_NS isn't set.
666 static inline struct net
*cifs_net_ns(struct TCP_Server_Info
*srv
)
671 static inline void cifs_set_net_ns(struct TCP_Server_Info
*srv
, struct net
*net
)
678 static inline struct net
*cifs_net_ns(struct TCP_Server_Info
*srv
)
683 static inline void cifs_set_net_ns(struct TCP_Server_Info
*srv
, struct net
*net
)
690 * Session structure. One of these for each uid session with a particular host
693 struct list_head smb_ses_list
;
694 struct list_head tcon_list
;
695 struct mutex session_mutex
;
696 struct TCP_Server_Info
*server
; /* pointer to server info */
697 int ses_count
; /* reference counter */
698 enum statusEnum status
;
699 unsigned overrideSecFlg
; /* if non-zero override global sec flags */
700 __u16 ipc_tid
; /* special tid for connection to IPC share */
702 char *serverOS
; /* name of operating system underlying server */
703 char *serverNOS
; /* name of network operating system of server */
704 char *serverDomain
; /* security realm of server */
705 __u64 Suid
; /* remote smb uid */
706 kuid_t linux_uid
; /* overriding owner of files on the mount */
707 kuid_t cred_uid
; /* owner of credentials */
708 unsigned int capabilities
;
709 char serverName
[SERVER_NAME_LEN_WITH_NULL
* 2]; /* BB make bigger for
710 TCP names - will ipv6 and sctp addresses fit? */
711 char *user_name
; /* must not be null except during init of sess
712 and after mount option parsing we fill it */
715 struct session_key auth_key
;
716 struct ntlmssp_auth
*ntlmssp
; /* ciphertext, flags, server challenge */
717 enum securityEnum sectype
; /* what security flavor was specified? */
718 bool sign
; /* is signing required? */
719 bool need_reconnect
:1; /* connection reset, uid now invalid */
720 #ifdef CONFIG_CIFS_SMB2
722 #endif /* CONFIG_CIFS_SMB2 */
726 cap_unix(struct cifs_ses
*ses
)
728 return ses
->server
->vals
->cap_unix
& ses
->capabilities
;
732 * there is one of these for each connection to a resource on a particular
736 struct list_head tcon_list
;
738 struct list_head openFileList
;
739 struct cifs_ses
*ses
; /* pointer to session associated with */
740 char treeName
[MAX_TREE_SIZE
+ 1]; /* UNC name of resource in ASCII */
741 char *nativeFileSystem
;
742 char *password
; /* for share-level security */
743 __u32 tid
; /* The 4 byte tree id */
744 __u16 Flags
; /* optional support bits */
745 enum statusEnum tidStatus
;
746 #ifdef CONFIG_CIFS_STATS
747 atomic_t num_smbs_sent
;
752 atomic_t num_flushes
;
753 atomic_t num_oplock_brks
;
756 atomic_t num_deletes
;
758 atomic_t num_posixopens
;
759 atomic_t num_posixmkdirs
;
761 atomic_t num_renames
;
762 atomic_t num_t2renames
;
766 atomic_t num_hardlinks
;
767 atomic_t num_symlinks
;
769 atomic_t num_acl_get
;
770 atomic_t num_acl_set
;
772 #ifdef CONFIG_CIFS_SMB2
774 atomic_t smb2_com_sent
[NUMBER_OF_SMB2_COMMANDS
];
775 atomic_t smb2_com_failed
[NUMBER_OF_SMB2_COMMANDS
];
777 #endif /* CONFIG_CIFS_SMB2 */
779 #ifdef CONFIG_CIFS_STATS2
780 unsigned long long time_writes
;
781 unsigned long long time_reads
;
782 unsigned long long time_opens
;
783 unsigned long long time_deletes
;
784 unsigned long long time_closes
;
785 unsigned long long time_mkdirs
;
786 unsigned long long time_rmdirs
;
787 unsigned long long time_renames
;
788 unsigned long long time_t2renames
;
789 unsigned long long time_ffirst
;
790 unsigned long long time_fnext
;
791 unsigned long long time_fclose
;
792 #endif /* CONFIG_CIFS_STATS2 */
795 spinlock_t stat_lock
;
796 #endif /* CONFIG_CIFS_STATS */
797 FILE_SYSTEM_DEVICE_INFO fsDevInfo
;
798 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo
; /* ok if fs name truncated */
799 FILE_SYSTEM_UNIX_INFO fsUnixInfo
;
800 bool ipc
:1; /* set if connection to IPC$ eg for RPC/PIPES */
803 bool seal
:1; /* transport encryption for this mounted share */
804 bool unix_ext
:1; /* if false disable Linux extensions to CIFS protocol
805 for this mount even if server would support */
806 bool local_lease
:1; /* check leases (only) on local system not remote */
807 bool broken_posix_open
; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
808 bool need_reconnect
:1; /* connection reset, tid now invalid */
809 #ifdef CONFIG_CIFS_SMB2
810 bool print
:1; /* set if connection to printer share */
811 bool bad_network_name
:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
814 __u32 maximal_access
;
815 __u32 vol_serial_number
;
816 __le64 vol_create_time
;
817 #endif /* CONFIG_CIFS_SMB2 */
818 #ifdef CONFIG_CIFS_FSCACHE
819 u64 resource_id
; /* server resource id */
820 struct fscache_cookie
*fscache
; /* cookie for share */
822 struct list_head pending_opens
; /* list of incomplete opens */
823 /* BB add field for back pointer to sb struct(s)? */
827 * This is a refcounted and timestamped container for a tcon pointer. The
828 * container holds a tcon reference. It is considered safe to free one of
829 * these when the tl_count goes to 0. The tl_time is the time of the last
830 * "get" on the container.
833 struct rb_node tl_rbnode
;
835 unsigned long tl_flags
;
836 #define TCON_LINK_MASTER 0
837 #define TCON_LINK_PENDING 1
838 #define TCON_LINK_IN_TREE 2
839 unsigned long tl_time
;
841 struct cifs_tcon
*tl_tcon
;
844 extern struct tcon_link
*cifs_sb_tlink(struct cifs_sb_info
*cifs_sb
);
846 static inline struct cifs_tcon
*
847 tlink_tcon(struct tcon_link
*tlink
)
849 return tlink
->tl_tcon
;
852 extern void cifs_put_tlink(struct tcon_link
*tlink
);
854 static inline struct tcon_link
*
855 cifs_get_tlink(struct tcon_link
*tlink
)
857 if (tlink
&& !IS_ERR(tlink
))
858 atomic_inc(&tlink
->tl_count
);
862 /* This function is always expected to succeed */
863 extern struct cifs_tcon
*cifs_sb_master_tcon(struct cifs_sb_info
*cifs_sb
);
865 #define CIFS_OPLOCK_NO_CHANGE 0xfe
867 struct cifs_pending_open
{
868 struct list_head olist
;
869 struct tcon_link
*tlink
;
875 * This info hangs off the cifsFileInfo structure, pointed to by llist.
876 * This is used to track byte stream locks on the file
878 struct cifsLockInfo
{
879 struct list_head llist
; /* pointer to next cifsLockInfo */
880 struct list_head blist
; /* pointer to locks blocked on this */
881 wait_queue_head_t block_q
;
889 * One of these for each open instance of a file
891 struct cifs_search_info
{
892 loff_t index_of_last_entry
;
893 __u16 entries_in_buffer
;
896 char *ntwrk_buf_start
;
897 char *srch_entries_start
;
899 const char *presume_name
;
900 unsigned int resume_name_len
;
904 bool smallBuf
:1; /* so we know which buf_release function to call */
909 #ifdef CONFIG_CIFS_SMB2
910 __u64 persistent_fid
; /* persist file id for smb2 */
911 __u64 volatile_fid
; /* volatile file id for smb2 */
912 __u8 lease_key
[SMB2_LEASE_KEY_SIZE
]; /* lease key for smb2 */
914 struct cifs_pending_open
*pending_open
;
917 struct cifs_fid_locks
{
918 struct list_head llist
;
919 struct cifsFileInfo
*cfile
; /* fid that owns locks */
920 struct list_head locks
; /* locks held by fid above */
923 struct cifsFileInfo
{
924 struct list_head tlist
; /* pointer to next fid owned by tcon */
925 struct list_head flist
; /* next fid (file instance) for this inode */
926 struct cifs_fid_locks
*llist
; /* brlocks held by this fid */
927 kuid_t uid
; /* allows finding which FileInfo structure */
928 __u32 pid
; /* process id who opened file */
929 struct cifs_fid fid
; /* file id from remote */
930 /* BB add lock scope info here if needed */ ;
931 /* lock scope id (0 if none) */
932 struct dentry
*dentry
;
933 unsigned int f_flags
;
934 struct tcon_link
*tlink
;
935 bool invalidHandle
:1; /* file closed via session abend */
936 bool oplock_break_cancelled
:1;
937 int count
; /* refcount protected by cifs_file_list_lock */
938 struct mutex fh_mutex
; /* prevents reopen race after dead ses*/
939 struct cifs_search_info srch_inf
;
940 struct work_struct oplock_break
; /* work for oplock breaks */
943 struct cifs_io_parms
{
945 #ifdef CONFIG_CIFS_SMB2
946 __u64 persistent_fid
; /* persist file id for smb2 */
947 __u64 volatile_fid
; /* volatile file id for smb2 */
952 struct cifs_tcon
*tcon
;
955 struct cifs_readdata
;
957 /* asynchronous read support */
958 struct cifs_readdata
{
959 struct kref refcount
;
960 struct list_head list
;
961 struct completion done
;
962 struct cifsFileInfo
*cfile
;
963 struct address_space
*mapping
;
968 struct work_struct work
;
969 int (*read_into_pages
)(struct TCP_Server_Info
*server
,
970 struct cifs_readdata
*rdata
,
975 unsigned int nr_pages
;
976 struct page
*pages
[];
979 struct cifs_writedata
;
981 /* asynchronous write support */
982 struct cifs_writedata
{
983 struct kref refcount
;
984 struct list_head list
;
985 struct completion done
;
986 enum writeback_sync_modes sync_mode
;
987 struct work_struct work
;
988 struct cifsFileInfo
*cfile
;
995 unsigned int nr_pages
;
996 struct page
*pages
[1];
1000 * Take a reference on the file private data. Must be called with
1001 * cifs_file_list_lock held.
1004 cifsFileInfo_get_locked(struct cifsFileInfo
*cifs_file
)
1009 struct cifsFileInfo
*cifsFileInfo_get(struct cifsFileInfo
*cifs_file
);
1010 void cifsFileInfo_put(struct cifsFileInfo
*cifs_file
);
1013 * One of these for each file inode
1016 struct cifsInodeInfo
{
1017 bool can_cache_brlcks
;
1018 struct list_head llist
; /* locks helb by this inode */
1019 struct rw_semaphore lock_sem
; /* protect the fields above */
1020 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1021 struct list_head openFileList
;
1022 __u32 cifsAttrs
; /* e.g. DOS archive bit, sparse, compressed, system */
1023 bool clientCanCacheRead
; /* read oplock */
1024 bool clientCanCacheAll
; /* read and writebehind oplock */
1025 bool delete_pending
; /* DELETE_ON_CLOSE is set */
1026 bool invalid_mapping
; /* pagecache is invalid */
1027 unsigned long time
; /* jiffies of last update of inode */
1028 u64 server_eof
; /* current file size on server -- protected by i_lock */
1029 u64 uniqueid
; /* server inode number */
1030 u64 createtime
; /* creation time on server */
1031 #ifdef CONFIG_CIFS_SMB2
1032 __u8 lease_key
[SMB2_LEASE_KEY_SIZE
]; /* lease key for this inode */
1034 #ifdef CONFIG_CIFS_FSCACHE
1035 struct fscache_cookie
*fscache
;
1037 struct inode vfs_inode
;
1040 static inline struct cifsInodeInfo
*
1041 CIFS_I(struct inode
*inode
)
1043 return container_of(inode
, struct cifsInodeInfo
, vfs_inode
);
1046 static inline struct cifs_sb_info
*
1047 CIFS_SB(struct super_block
*sb
)
1049 return sb
->s_fs_info
;
1052 static inline char CIFS_DIR_SEP(const struct cifs_sb_info
*cifs_sb
)
1054 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
)
1061 convert_delimiter(char *path
, char delim
)
1063 char old_delim
, *pos
;
1071 while ((pos
= strchr(pos
, old_delim
)))
1075 #ifdef CONFIG_CIFS_STATS
1076 #define cifs_stats_inc atomic_inc
1078 static inline void cifs_stats_bytes_written(struct cifs_tcon
*tcon
,
1082 spin_lock(&tcon
->stat_lock
);
1083 tcon
->bytes_written
+= bytes
;
1084 spin_unlock(&tcon
->stat_lock
);
1088 static inline void cifs_stats_bytes_read(struct cifs_tcon
*tcon
,
1091 spin_lock(&tcon
->stat_lock
);
1092 tcon
->bytes_read
+= bytes
;
1093 spin_unlock(&tcon
->stat_lock
);
1097 #define cifs_stats_inc(field) do {} while (0)
1098 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1099 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1105 * This is the prototype for the mid receive function. This function is for
1106 * receiving the rest of the SMB frame, starting with the WordCount (which is
1107 * just after the MID in struct smb_hdr). Note:
1109 * - This will be called by cifsd, with no locks held.
1110 * - The mid will still be on the pending_mid_q.
1111 * - mid->resp_buf will point to the current buffer.
1113 * Returns zero on a successful receive, or an error. The receive state in
1114 * the TCP_Server_Info will also be updated.
1116 typedef int (mid_receive_t
)(struct TCP_Server_Info
*server
,
1117 struct mid_q_entry
*mid
);
1120 * This is the prototype for the mid callback function. This is called once the
1121 * mid has been received off of the socket. When creating one, take special
1122 * care to avoid deadlocks. Things to bear in mind:
1124 * - it will be called by cifsd, with no locks held
1125 * - the mid will be removed from any lists
1127 typedef void (mid_callback_t
)(struct mid_q_entry
*mid
);
1129 /* one of these for every pending CIFS request to the server */
1130 struct mid_q_entry
{
1131 struct list_head qhead
; /* mids waiting on reply from this server */
1132 struct TCP_Server_Info
*server
; /* server corresponding to this mid */
1133 __u64 mid
; /* multiplex id */
1134 __u32 pid
; /* process id */
1135 __u32 sequence_number
; /* for CIFS signing */
1136 unsigned long when_alloc
; /* when mid was created */
1137 #ifdef CONFIG_CIFS_STATS2
1138 unsigned long when_sent
; /* time when smb send finished */
1139 unsigned long when_received
; /* when demux complete (taken off wire) */
1141 mid_receive_t
*receive
; /* call receive callback */
1142 mid_callback_t
*callback
; /* call completion callback */
1143 void *callback_data
; /* general purpose pointer for callback */
1144 void *resp_buf
; /* pointer to received SMB header */
1145 int mid_state
; /* wish this were enum but can not pass to wait_event */
1146 __le16 command
; /* smb command code */
1147 bool large_buf
:1; /* if valid response, is pointer to large buf */
1148 bool multiRsp
:1; /* multiple trans2 responses for one request */
1149 bool multiEnd
:1; /* both received */
1152 /* Make code in transport.c a little cleaner by moving
1153 update of optional stats into function below */
1154 #ifdef CONFIG_CIFS_STATS2
1156 static inline void cifs_in_send_inc(struct TCP_Server_Info
*server
)
1158 atomic_inc(&server
->in_send
);
1161 static inline void cifs_in_send_dec(struct TCP_Server_Info
*server
)
1163 atomic_dec(&server
->in_send
);
1166 static inline void cifs_num_waiters_inc(struct TCP_Server_Info
*server
)
1168 atomic_inc(&server
->num_waiters
);
1171 static inline void cifs_num_waiters_dec(struct TCP_Server_Info
*server
)
1173 atomic_dec(&server
->num_waiters
);
1176 static inline void cifs_save_when_sent(struct mid_q_entry
*mid
)
1178 mid
->when_sent
= jiffies
;
1181 static inline void cifs_in_send_inc(struct TCP_Server_Info
*server
)
1184 static inline void cifs_in_send_dec(struct TCP_Server_Info
*server
)
1188 static inline void cifs_num_waiters_inc(struct TCP_Server_Info
*server
)
1192 static inline void cifs_num_waiters_dec(struct TCP_Server_Info
*server
)
1196 static inline void cifs_save_when_sent(struct mid_q_entry
*mid
)
1201 /* for pending dnotify requests */
1202 struct dir_notify_req
{
1203 struct list_head lhead
;
1210 __u32 filter
; /* CompletionFilter (for multishot) */
1215 struct dfs_info3_param
{
1216 int flags
; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1225 * common struct for holding inode info when searching for or updating an
1226 * inode with new info
1229 #define CIFS_FATTR_DFS_REFERRAL 0x1
1230 #define CIFS_FATTR_DELETE_PENDING 0x2
1231 #define CIFS_FATTR_NEED_REVAL 0x4
1232 #define CIFS_FATTR_INO_COLLISION 0x8
1245 unsigned int cf_nlink
;
1246 unsigned int cf_dtype
;
1247 struct timespec cf_atime
;
1248 struct timespec cf_mtime
;
1249 struct timespec cf_ctime
;
1252 static inline void free_dfs_info_param(struct dfs_info3_param
*param
)
1255 kfree(param
->path_name
);
1256 kfree(param
->node_name
);
1261 static inline void free_dfs_info_array(struct dfs_info3_param
*param
,
1262 int number_of_items
)
1265 if ((number_of_items
== 0) || (param
== NULL
))
1267 for (i
= 0; i
< number_of_items
; i
++) {
1268 kfree(param
[i
].path_name
);
1269 kfree(param
[i
].node_name
);
1275 #define MID_REQUEST_ALLOCATED 1
1276 #define MID_REQUEST_SUBMITTED 2
1277 #define MID_RESPONSE_RECEIVED 4
1278 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1279 #define MID_RESPONSE_MALFORMED 0x10
1280 #define MID_SHUTDOWN 0x20
1282 /* Types of response buffer returned from SendReceive2 */
1283 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1284 #define CIFS_SMALL_BUFFER 1
1285 #define CIFS_LARGE_BUFFER 2
1286 #define CIFS_IOVEC 4 /* array of response buffers */
1288 /* Type of Request to SendReceive2 */
1289 #define CIFS_BLOCKING_OP 1 /* operation can block */
1290 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1291 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1292 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1293 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1294 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1296 /* Type of request operation */
1297 #define CIFS_ECHO_OP 0x080 /* echo request */
1298 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1299 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1300 #define CIFS_OP_MASK 0x0380 /* mask request type */
1302 /* Security Flags: indicate type of session setup needed */
1303 #define CIFSSEC_MAY_SIGN 0x00001
1304 #define CIFSSEC_MAY_NTLM 0x00002
1305 #define CIFSSEC_MAY_NTLMV2 0x00004
1306 #define CIFSSEC_MAY_KRB5 0x00008
1307 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1308 #define CIFSSEC_MAY_LANMAN 0x00010
1309 #define CIFSSEC_MAY_PLNTXT 0x00020
1311 #define CIFSSEC_MAY_LANMAN 0
1312 #define CIFSSEC_MAY_PLNTXT 0
1313 #endif /* weak passwords */
1314 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1315 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1317 #define CIFSSEC_MUST_SIGN 0x01001
1318 /* note that only one of the following can be set so the
1319 result of setting MUST flags more than once will be to
1320 require use of the stronger protocol */
1321 #define CIFSSEC_MUST_NTLM 0x02002
1322 #define CIFSSEC_MUST_NTLMV2 0x04004
1323 #define CIFSSEC_MUST_KRB5 0x08008
1324 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1325 #define CIFSSEC_MUST_LANMAN 0x10010
1326 #define CIFSSEC_MUST_PLNTXT 0x20020
1327 #ifdef CONFIG_CIFS_UPCALL
1328 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1330 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1332 #else /* do not allow weak pw hash */
1333 #define CIFSSEC_MUST_LANMAN 0
1334 #define CIFSSEC_MUST_PLNTXT 0
1335 #ifdef CONFIG_CIFS_UPCALL
1336 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1338 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1340 #endif /* WEAK_PW_HASH */
1341 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1342 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1344 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1345 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1346 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1348 *****************************************************************
1349 * All constants go here
1350 *****************************************************************
1353 #define UID_HASH (16)
1356 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1357 * following to be declared.
1360 /****************************************************************************
1361 * Locking notes. All updates to global variables and lists should be
1362 * protected by spinlocks or semaphores.
1366 * GlobalMid_Lock protects:
1367 * list operations on pending_mid_q and oplockQ
1368 * updates to XID counters, multiplex id and SMB sequence numbers
1369 * cifs_file_list_lock protects:
1370 * list operations on tcp and SMB session lists and tCon lists
1371 * f_owner.lock protects certain per file struct operations
1372 * mapping->page_lock protects certain per page operations
1376 * sesSem operations on smb session
1377 * tconSem operations on tree connection
1378 * fh_sem file handle reconnection operations
1380 ****************************************************************************/
1382 #ifdef DECLARE_GLOBALS_HERE
1383 #define GLOBAL_EXTERN
1385 #define GLOBAL_EXTERN extern
1389 * the list of TCP_Server_Info structures, ie each of the sockets
1390 * connecting our client to a distinct server (ip address), is
1391 * chained together by cifs_tcp_ses_list. The list of all our SMB
1392 * sessions (and from that the tree connections) can be found
1393 * by iterating over cifs_tcp_ses_list
1395 GLOBAL_EXTERN
struct list_head cifs_tcp_ses_list
;
1398 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1399 * tcp session, and the list of tcon's per smb session. It also protects
1400 * the reference counters for the server, smb session, and tcon. Finally,
1401 * changes to the tcon->tidStatus should be done while holding this lock.
1403 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock
;
1406 * This lock protects the cifs_file->llist and cifs_file->flist
1407 * list operations, and updates to some flags (cifs_file->invalidHandle)
1408 * It will be moved to either use the tcon->stat_lock or equivalent later.
1409 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1410 * the cifs_tcp_ses_lock must be grabbed first and released last.
1412 GLOBAL_EXTERN spinlock_t cifs_file_list_lock
;
1414 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1415 /* Outstanding dir notify requests */
1416 GLOBAL_EXTERN
struct list_head GlobalDnotifyReqList
;
1417 /* DirNotify response queue */
1418 GLOBAL_EXTERN
struct list_head GlobalDnotifyRsp_Q
;
1419 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1422 * Global transaction id (XID) information
1424 GLOBAL_EXTERN
unsigned int GlobalCurrentXid
; /* protected by GlobalMid_Sem */
1425 GLOBAL_EXTERN
unsigned int GlobalTotalActiveXid
; /* prot by GlobalMid_Sem */
1426 GLOBAL_EXTERN
unsigned int GlobalMaxActiveXid
; /* prot by GlobalMid_Sem */
1427 GLOBAL_EXTERN spinlock_t GlobalMid_Lock
; /* protects above & list operations */
1428 /* on midQ entries */
1430 * Global counters, updated atomically
1432 GLOBAL_EXTERN atomic_t sesInfoAllocCount
;
1433 GLOBAL_EXTERN atomic_t tconInfoAllocCount
;
1434 GLOBAL_EXTERN atomic_t tcpSesAllocCount
;
1435 GLOBAL_EXTERN atomic_t tcpSesReconnectCount
;
1436 GLOBAL_EXTERN atomic_t tconInfoReconnectCount
;
1438 /* Various Debug counters */
1439 GLOBAL_EXTERN atomic_t bufAllocCount
; /* current number allocated */
1440 #ifdef CONFIG_CIFS_STATS2
1441 GLOBAL_EXTERN atomic_t totBufAllocCount
; /* total allocated over all time */
1442 GLOBAL_EXTERN atomic_t totSmBufAllocCount
;
1444 GLOBAL_EXTERN atomic_t smBufAllocCount
;
1445 GLOBAL_EXTERN atomic_t midCount
;
1448 GLOBAL_EXTERN
bool enable_oplocks
; /* enable or disable oplocks */
1449 GLOBAL_EXTERN
unsigned int lookupCacheEnabled
;
1450 GLOBAL_EXTERN
unsigned int global_secflags
; /* if on, session setup sent
1451 with more secure ntlmssp2 challenge/resp */
1452 GLOBAL_EXTERN
unsigned int sign_CIFS_PDUs
; /* enable smb packet signing */
1453 GLOBAL_EXTERN
unsigned int linuxExtEnabled
;/*enable Linux/Unix CIFS extensions*/
1454 GLOBAL_EXTERN
unsigned int CIFSMaxBufSize
; /* max size not including hdr */
1455 GLOBAL_EXTERN
unsigned int cifs_min_rcv
; /* min size of big ntwrk buf pool */
1456 GLOBAL_EXTERN
unsigned int cifs_min_small
; /* min size of small buf pool */
1457 GLOBAL_EXTERN
unsigned int cifs_max_pending
; /* MAX requests at once to server*/
1459 #ifdef CONFIG_CIFS_ACL
1460 GLOBAL_EXTERN
struct rb_root uidtree
;
1461 GLOBAL_EXTERN
struct rb_root gidtree
;
1462 GLOBAL_EXTERN spinlock_t siduidlock
;
1463 GLOBAL_EXTERN spinlock_t sidgidlock
;
1464 GLOBAL_EXTERN
struct rb_root siduidtree
;
1465 GLOBAL_EXTERN
struct rb_root sidgidtree
;
1466 GLOBAL_EXTERN spinlock_t uidsidlock
;
1467 GLOBAL_EXTERN spinlock_t gidsidlock
;
1468 #endif /* CONFIG_CIFS_ACL */
1470 void cifs_oplock_break(struct work_struct
*work
);
1472 extern const struct slow_work_ops cifs_oplock_break_ops
;
1473 extern struct workqueue_struct
*cifsiod_wq
;
1475 extern mempool_t
*cifs_mid_poolp
;
1477 /* Operations for different SMB versions */
1478 #define SMB1_VERSION_STRING "1.0"
1479 extern struct smb_version_operations smb1_operations
;
1480 extern struct smb_version_values smb1_values
;
1481 #define SMB20_VERSION_STRING "2.0"
1482 /*extern struct smb_version_operations smb20_operations; */ /* not needed yet */
1483 extern struct smb_version_values smb20_values
;
1484 #define SMB21_VERSION_STRING "2.1"
1485 extern struct smb_version_operations smb21_operations
;
1486 extern struct smb_version_values smb21_values
;
1487 #define SMB30_VERSION_STRING "3.0"
1488 extern struct smb_version_operations smb30_operations
;
1489 extern struct smb_version_values smb30_values
;
1490 #define SMB302_VERSION_STRING "3.02"
1491 /*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1492 extern struct smb_version_values smb302_values
;
1493 #endif /* _CIFS_GLOB_H */