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/workqueue.h>
26 #include "cifs_fs_sb.h"
28 #include <crypto/internal/hash.h>
29 #include <linux/scatterlist.h>
32 * The sizes of various internal tables and strings
34 #define MAX_UID_INFO 16
35 #define MAX_SES_INFO 2
36 #define MAX_TCON_INFO 4
38 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
39 #define MAX_SERVER_SIZE 15
40 #define MAX_SHARE_SIZE 80
41 #define MAX_USERNAME_SIZE 256 /* reasonable maximum for current servers */
42 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
44 #define CIFS_MIN_RCV_POOL 4
47 * default attribute cache timeout (jiffies)
49 #define CIFS_DEF_ACTIMEO (1 * HZ)
52 * max attribute cache timeout (jiffies) - 2^30
54 #define CIFS_MAX_ACTIMEO (1 << 30)
57 * MAX_REQ is the maximum number of requests that WE will send
58 * on one socket concurrently.
60 #define CIFS_MAX_REQ 32767
62 #define RFC1001_NAME_LEN 15
63 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
65 /* currently length of NIP6_FMT */
66 #define SERVER_NAME_LENGTH 40
67 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
69 /* used to define string lengths for reversing unicode strings */
71 /* (max path length + 1 for null) * 2 for unicode */
76 #ifndef XATTR_DOS_ATTRIB
77 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
81 * CIFS vfs client Status information (based on what we know.)
84 /* associated with each tcp and smb session */
94 LANMAN
= 0, /* Legacy LANMAN auth */
95 NTLM
, /* Legacy NTLM012 auth with NTLM hash */
96 NTLMv2
, /* Legacy NTLM auth with NTLMv2 hash */
97 RawNTLMSSP
, /* NTLMSSP without SPNEGO, NTLMv2 hash */
98 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
99 Kerberos
, /* Kerberos via SPNEGO */
105 /* Netbios frames protocol not supported at this time */
113 /* crypto security descriptor definition */
115 struct shash_desc shash
;
119 /* crypto hashing related structure/fields, not specific to a sec mech */
120 struct cifs_secmech
{
121 struct crypto_shash
*hmacmd5
; /* hmac-md5 hash function */
122 struct crypto_shash
*md5
; /* md5 hash function */
123 struct sdesc
*sdeschmacmd5
; /* ctxt to generate ntlmv2 hash, CR1 */
124 struct sdesc
*sdescmd5
; /* ctxt to generate cifs/smb signature */
127 /* per smb session structure/fields */
128 struct ntlmssp_auth
{
129 __u32 client_flags
; /* sent by client in type 1 ntlmsssp exchange */
130 __u32 server_flags
; /* sent by server in type 2 ntlmssp exchange */
131 unsigned char ciphertext
[CIFS_CPHTXT_SIZE
]; /* sent to server */
132 char cryptkey
[CIFS_CRYPTO_KEY_SIZE
]; /* used by ntlmssp */
140 struct cifs_sid osid
;
141 struct cifs_sid gsid
;
142 struct cifs_ntace
*ntaces
;
143 struct cifs_ace
*aces
;
147 *****************************************************************
148 * Except the CIFS PDUs themselves all the
149 * globally interesting structs should go here
150 *****************************************************************
158 struct TCP_Server_Info
;
160 struct smb_version_operations
{
161 int (*send_cancel
)(struct TCP_Server_Info
*, void *,
162 struct mid_q_entry
*);
165 struct smb_version_values
{
166 char *version_string
;
175 char *iocharset
; /* local code page for mapping to and from Unicode */
176 char source_rfc1001_name
[RFC1001_NAME_LEN_WITH_NULL
]; /* clnt nb name */
177 char target_rfc1001_name
[RFC1001_NAME_LEN_WITH_NULL
]; /* srvr nb name */
193 bool no_psx_acl
:1; /* set if posix acl support should be disabled */
195 bool backupuid_specified
; /* mount option backupuid is specified */
196 bool backupgid_specified
; /* mount option backupgid is specified */
197 bool no_xattr
:1; /* set if xattr (EA) support should be disabled*/
198 bool server_ino
:1; /* use inode numbers from server ie UniqueId */
200 bool strict_io
:1; /* strict cache behavior */
201 bool remap
:1; /* set to remap seven reserved chars in filenames */
202 bool posix_paths
:1; /* unset to not ask for posix pathnames. */
205 bool nullauth
:1; /* attempt to authenticate with null user */
206 bool nocase
:1; /* request case insensitive filenames */
207 bool nobrl
:1; /* disable sending byte range locks to srv */
208 bool mand_lock
:1; /* send mandatory not posix byte range lock reqs */
209 bool seal
:1; /* request transport encryption on share */
210 bool nodfs
:1; /* Do not request DFS, even if available */
211 bool local_lease
:1; /* check leases only on local system, not remote */
214 bool nostrictsync
:1; /* do not force expensive SMBflush on every sync */
215 bool fsc
:1; /* enable fscache */
216 bool mfsymlinks
:1; /* use Minshall+French Symlinks */
218 bool rwpidforward
:1; /* pid forward for read/write operations */
221 bool sockopt_tcp_nodelay
:1;
222 unsigned short int port
;
223 unsigned long actimeo
; /* attribute cache timeout (jiffies) */
224 struct smb_version_operations
*ops
;
225 struct smb_version_values
*vals
;
227 struct sockaddr_storage srcaddr
; /* allow binding to a local IP */
228 struct nls_table
*local_nls
;
231 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
232 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
233 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
234 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
235 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
236 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
237 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
238 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
239 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
240 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
242 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
243 MS_NODEV | MS_SYNCHRONOUS)
245 struct cifs_mnt_data
{
246 struct cifs_sb_info
*cifs_sb
;
251 static inline unsigned int
252 get_rfc1002_length(void *buf
)
254 return be32_to_cpu(*((__be32
*)buf
));
257 struct TCP_Server_Info
{
258 struct list_head tcp_ses_list
;
259 struct list_head smb_ses_list
;
260 int srv_count
; /* reference counter */
261 /* 15 character server name + 0x20 16th byte indicating type = srv */
262 char server_RFC1001_name
[RFC1001_NAME_LEN_WITH_NULL
];
263 struct smb_version_operations
*ops
;
264 struct smb_version_values
*vals
;
265 enum statusEnum tcpStatus
; /* what we think the status is */
266 char *hostname
; /* hostname portion of UNC string */
267 struct socket
*ssocket
;
268 struct sockaddr_storage dstaddr
;
269 struct sockaddr_storage srcaddr
; /* locally bind to this IP */
273 wait_queue_head_t response_q
;
274 wait_queue_head_t request_q
; /* if more than maxmpx to srvr must block*/
275 struct list_head pending_mid_q
;
276 bool noblocksnd
; /* use blocking sendmsg */
277 bool noautotune
; /* do not autotune send buf sizes */
279 int credits
; /* send no more requests at once */
280 unsigned int in_flight
; /* number of requests on the wire to server */
281 spinlock_t req_lock
; /* protect the two values above */
282 struct mutex srv_mutex
;
283 struct task_struct
*tsk
;
284 char server_GUID
[16];
286 bool session_estab
; /* mark when very first sess is established */
287 u16 dialect
; /* dialect index that server chose */
288 enum securityEnum secType
;
289 bool oplocks
:1; /* enable oplocks */
290 unsigned int maxReq
; /* Clients should submit no more */
291 /* than maxReq distinct unanswered SMBs to the server when using */
292 /* multiplexed reads or writes */
293 unsigned int maxBuf
; /* maxBuf specifies the maximum */
294 /* message size the server can send or receive for non-raw SMBs */
295 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
296 /* when socket is setup (and during reconnect) before NegProt sent */
297 unsigned int max_rw
; /* maxRw specifies the maximum */
298 /* message size the server can send or receive for */
299 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
300 unsigned int max_vcs
; /* maximum number of smb sessions, at least
301 those that can be specified uniquely with
303 int capabilities
; /* allow selective disabling of caps by smb sess */
304 int timeAdj
; /* Adjust for difference in server time zone in sec */
305 __u64 CurrentMid
; /* multiplex id - rotating counter */
306 char cryptkey
[CIFS_CRYPTO_KEY_SIZE
]; /* used by ntlm, ntlmv2 etc */
307 /* 16th byte of RFC1001 workstation name is always null */
308 char workstation_RFC1001_name
[RFC1001_NAME_LEN_WITH_NULL
];
309 __u32 sequence_number
; /* for signing, protected by srv_mutex */
310 struct session_key session_key
;
311 unsigned long lstrp
; /* when we got last response from this server */
312 struct cifs_secmech secmech
; /* crypto sec mech functs, descriptors */
313 /* extended security flavors that server supports */
314 bool sec_ntlmssp
; /* supports NTLMSSP */
315 bool sec_kerberosu2u
; /* supports U2U Kerberos */
316 bool sec_kerberos
; /* supports plain Kerberos */
317 bool sec_mskerberos
; /* supports legacy MS Kerberos */
318 bool large_buf
; /* is current buffer large? */
319 struct delayed_work echo
; /* echo ping workqueue job */
320 struct kvec
*iov
; /* reusable kvec array for receives */
321 unsigned int nr_iov
; /* number of kvecs in array */
322 char *smallbuf
; /* pointer to current "small" buffer */
323 char *bigbuf
; /* pointer to current "big" buffer */
324 unsigned int total_read
; /* total amount of data read in this pass */
325 #ifdef CONFIG_CIFS_FSCACHE
326 struct fscache_cookie
*fscache
; /* client index cache cookie */
328 #ifdef CONFIG_CIFS_STATS2
329 atomic_t in_send
; /* requests trying to send */
330 atomic_t num_waiters
; /* blocked waiting to get in sendrecv */
334 static inline unsigned int
335 in_flight(struct TCP_Server_Info
*server
)
338 spin_lock(&server
->req_lock
);
339 num
= server
->in_flight
;
340 spin_unlock(&server
->req_lock
);
345 get_credits_field(struct TCP_Server_Info
*server
)
348 * This will change to switch statement when we reserve slots for echos
351 return &server
->credits
;
355 has_credits(struct TCP_Server_Info
*server
, int *credits
)
358 spin_lock(&server
->req_lock
);
360 spin_unlock(&server
->req_lock
);
367 return sizeof(struct smb_hdr
);
371 max_header_size(void)
373 return MAX_CIFS_HDR_SIZE
;
377 * Macros to allow the TCP_Server_Info->net field and related code to drop out
378 * when CONFIG_NET_NS isn't set.
383 static inline struct net
*cifs_net_ns(struct TCP_Server_Info
*srv
)
388 static inline void cifs_set_net_ns(struct TCP_Server_Info
*srv
, struct net
*net
)
395 static inline struct net
*cifs_net_ns(struct TCP_Server_Info
*srv
)
400 static inline void cifs_set_net_ns(struct TCP_Server_Info
*srv
, struct net
*net
)
407 * Session structure. One of these for each uid session with a particular host
410 struct list_head smb_ses_list
;
411 struct list_head tcon_list
;
412 struct mutex session_mutex
;
413 struct TCP_Server_Info
*server
; /* pointer to server info */
414 int ses_count
; /* reference counter */
415 enum statusEnum status
;
416 unsigned overrideSecFlg
; /* if non-zero override global sec flags */
417 __u16 ipc_tid
; /* special tid for connection to IPC share */
420 char *serverOS
; /* name of operating system underlying server */
421 char *serverNOS
; /* name of network operating system of server */
422 char *serverDomain
; /* security realm of server */
423 int Suid
; /* remote smb uid */
424 uid_t linux_uid
; /* overriding owner of files on the mount */
425 uid_t cred_uid
; /* owner of credentials */
427 char serverName
[SERVER_NAME_LEN_WITH_NULL
* 2]; /* BB make bigger for
428 TCP names - will ipv6 and sctp addresses fit? */
429 char *user_name
; /* must not be null except during init of sess
430 and after mount option parsing we fill it */
433 struct session_key auth_key
;
434 struct ntlmssp_auth
*ntlmssp
; /* ciphertext, flags, server challenge */
435 bool need_reconnect
:1; /* connection reset, uid now invalid */
437 /* no more than one of the following three session flags may be set */
438 #define CIFS_SES_NT4 1
439 #define CIFS_SES_OS2 2
440 #define CIFS_SES_W9X 4
441 /* following flag is set for old servers such as OS2 (and Win95?)
442 which do not negotiate NTLM or POSIX dialects, but instead
443 negotiate one of the older LANMAN dialects */
444 #define CIFS_SES_LANMAN 8
446 * there is one of these for each connection to a resource on a particular
450 struct list_head tcon_list
;
452 struct list_head openFileList
;
453 struct cifs_ses
*ses
; /* pointer to session associated with */
454 char treeName
[MAX_TREE_SIZE
+ 1]; /* UNC name of resource in ASCII */
455 char *nativeFileSystem
;
456 char *password
; /* for share-level security */
457 __u16 tid
; /* The 2 byte tree id */
458 __u16 Flags
; /* optional support bits */
459 enum statusEnum tidStatus
;
460 #ifdef CONFIG_CIFS_STATS
461 atomic_t num_smbs_sent
;
464 atomic_t num_flushes
;
465 atomic_t num_oplock_brks
;
468 atomic_t num_deletes
;
470 atomic_t num_posixopens
;
471 atomic_t num_posixmkdirs
;
473 atomic_t num_renames
;
474 atomic_t num_t2renames
;
478 atomic_t num_hardlinks
;
479 atomic_t num_symlinks
;
481 atomic_t num_acl_get
;
482 atomic_t num_acl_set
;
483 #ifdef CONFIG_CIFS_STATS2
484 unsigned long long time_writes
;
485 unsigned long long time_reads
;
486 unsigned long long time_opens
;
487 unsigned long long time_deletes
;
488 unsigned long long time_closes
;
489 unsigned long long time_mkdirs
;
490 unsigned long long time_rmdirs
;
491 unsigned long long time_renames
;
492 unsigned long long time_t2renames
;
493 unsigned long long time_ffirst
;
494 unsigned long long time_fnext
;
495 unsigned long long time_fclose
;
496 #endif /* CONFIG_CIFS_STATS2 */
499 spinlock_t stat_lock
;
500 #endif /* CONFIG_CIFS_STATS */
501 FILE_SYSTEM_DEVICE_INFO fsDevInfo
;
502 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo
; /* ok if fs name truncated */
503 FILE_SYSTEM_UNIX_INFO fsUnixInfo
;
504 bool ipc
:1; /* set if connection to IPC$ eg for RPC/PIPES */
507 bool seal
:1; /* transport encryption for this mounted share */
508 bool unix_ext
:1; /* if false disable Linux extensions to CIFS protocol
509 for this mount even if server would support */
510 bool local_lease
:1; /* check leases (only) on local system not remote */
511 bool broken_posix_open
; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
512 bool need_reconnect
:1; /* connection reset, tid now invalid */
513 #ifdef CONFIG_CIFS_FSCACHE
514 u64 resource_id
; /* server resource id */
515 struct fscache_cookie
*fscache
; /* cookie for share */
517 /* BB add field for back pointer to sb struct(s)? */
521 * This is a refcounted and timestamped container for a tcon pointer. The
522 * container holds a tcon reference. It is considered safe to free one of
523 * these when the tl_count goes to 0. The tl_time is the time of the last
524 * "get" on the container.
527 struct rb_node tl_rbnode
;
529 unsigned long tl_flags
;
530 #define TCON_LINK_MASTER 0
531 #define TCON_LINK_PENDING 1
532 #define TCON_LINK_IN_TREE 2
533 unsigned long tl_time
;
535 struct cifs_tcon
*tl_tcon
;
538 extern struct tcon_link
*cifs_sb_tlink(struct cifs_sb_info
*cifs_sb
);
540 static inline struct cifs_tcon
*
541 tlink_tcon(struct tcon_link
*tlink
)
543 return tlink
->tl_tcon
;
546 extern void cifs_put_tlink(struct tcon_link
*tlink
);
548 static inline struct tcon_link
*
549 cifs_get_tlink(struct tcon_link
*tlink
)
551 if (tlink
&& !IS_ERR(tlink
))
552 atomic_inc(&tlink
->tl_count
);
556 /* This function is always expected to succeed */
557 extern struct cifs_tcon
*cifs_sb_master_tcon(struct cifs_sb_info
*cifs_sb
);
560 * This info hangs off the cifsFileInfo structure, pointed to by llist.
561 * This is used to track byte stream locks on the file
563 struct cifsLockInfo
{
564 struct list_head llist
; /* pointer to next cifsLockInfo */
565 struct list_head blist
; /* pointer to locks blocked on this */
566 wait_queue_head_t block_q
;
574 * One of these for each open instance of a file
576 struct cifs_search_info
{
577 loff_t index_of_last_entry
;
578 __u16 entries_in_buffer
;
581 char *ntwrk_buf_start
;
582 char *srch_entries_start
;
584 const char *presume_name
;
585 unsigned int resume_name_len
;
589 bool smallBuf
:1; /* so we know which buf_release function to call */
592 struct cifsFileInfo
{
593 struct list_head tlist
; /* pointer to next fid owned by tcon */
594 struct list_head flist
; /* next fid (file instance) for this inode */
595 struct list_head llist
; /*
596 * brlocks held by this fid, protected by
597 * lock_mutex from cifsInodeInfo structure
599 unsigned int uid
; /* allows finding which FileInfo structure */
600 __u32 pid
; /* process id who opened file */
601 __u16 netfid
; /* file id from remote */
602 /* BB add lock scope info here if needed */ ;
603 /* lock scope id (0 if none) */
604 struct dentry
*dentry
;
605 unsigned int f_flags
;
606 struct tcon_link
*tlink
;
607 bool invalidHandle
:1; /* file closed via session abend */
608 bool oplock_break_cancelled
:1;
609 int count
; /* refcount protected by cifs_file_list_lock */
610 struct mutex fh_mutex
; /* prevents reopen race after dead ses*/
611 struct cifs_search_info srch_inf
;
612 struct work_struct oplock_break
; /* work for oplock breaks */
615 struct cifs_io_parms
{
620 struct cifs_tcon
*tcon
;
624 * Take a reference on the file private data. Must be called with
625 * cifs_file_list_lock held.
628 struct cifsFileInfo
*cifsFileInfo_get(struct cifsFileInfo
*cifs_file
)
634 void cifsFileInfo_put(struct cifsFileInfo
*cifs_file
);
637 * One of these for each file inode
640 struct cifsInodeInfo
{
641 bool can_cache_brlcks
;
642 struct mutex lock_mutex
; /*
643 * protect the field above and llist
644 * from every cifsFileInfo structure
647 /* BB add in lists for dirty pages i.e. write caching info for oplock */
648 struct list_head openFileList
;
649 __u32 cifsAttrs
; /* e.g. DOS archive bit, sparse, compressed, system */
650 bool clientCanCacheRead
; /* read oplock */
651 bool clientCanCacheAll
; /* read and writebehind oplock */
652 bool delete_pending
; /* DELETE_ON_CLOSE is set */
653 bool invalid_mapping
; /* pagecache is invalid */
654 unsigned long time
; /* jiffies of last update of inode */
655 u64 server_eof
; /* current file size on server -- protected by i_lock */
656 u64 uniqueid
; /* server inode number */
657 u64 createtime
; /* creation time on server */
658 #ifdef CONFIG_CIFS_FSCACHE
659 struct fscache_cookie
*fscache
;
661 struct inode vfs_inode
;
664 static inline struct cifsInodeInfo
*
665 CIFS_I(struct inode
*inode
)
667 return container_of(inode
, struct cifsInodeInfo
, vfs_inode
);
670 static inline struct cifs_sb_info
*
671 CIFS_SB(struct super_block
*sb
)
673 return sb
->s_fs_info
;
676 static inline char CIFS_DIR_SEP(const struct cifs_sb_info
*cifs_sb
)
678 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_POSIX_PATHS
)
685 convert_delimiter(char *path
, char delim
)
698 for (i
= 0; path
[i
] != '\0'; i
++) {
699 if (path
[i
] == old_delim
)
704 #ifdef CONFIG_CIFS_STATS
705 #define cifs_stats_inc atomic_inc
707 static inline void cifs_stats_bytes_written(struct cifs_tcon
*tcon
,
711 spin_lock(&tcon
->stat_lock
);
712 tcon
->bytes_written
+= bytes
;
713 spin_unlock(&tcon
->stat_lock
);
717 static inline void cifs_stats_bytes_read(struct cifs_tcon
*tcon
,
720 spin_lock(&tcon
->stat_lock
);
721 tcon
->bytes_read
+= bytes
;
722 spin_unlock(&tcon
->stat_lock
);
726 #define cifs_stats_inc(field) do {} while (0)
727 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
728 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
734 * This is the prototype for the mid receive function. This function is for
735 * receiving the rest of the SMB frame, starting with the WordCount (which is
736 * just after the MID in struct smb_hdr). Note:
738 * - This will be called by cifsd, with no locks held.
739 * - The mid will still be on the pending_mid_q.
740 * - mid->resp_buf will point to the current buffer.
742 * Returns zero on a successful receive, or an error. The receive state in
743 * the TCP_Server_Info will also be updated.
745 typedef int (mid_receive_t
)(struct TCP_Server_Info
*server
,
746 struct mid_q_entry
*mid
);
749 * This is the prototype for the mid callback function. This is called once the
750 * mid has been received off of the socket. When creating one, take special
751 * care to avoid deadlocks. Things to bear in mind:
753 * - it will be called by cifsd, with no locks held
754 * - the mid will be removed from any lists
756 typedef void (mid_callback_t
)(struct mid_q_entry
*mid
);
758 /* one of these for every pending CIFS request to the server */
760 struct list_head qhead
; /* mids waiting on reply from this server */
761 __u64 mid
; /* multiplex id */
762 __u32 pid
; /* process id */
763 __u32 sequence_number
; /* for CIFS signing */
764 unsigned long when_alloc
; /* when mid was created */
765 #ifdef CONFIG_CIFS_STATS2
766 unsigned long when_sent
; /* time when smb send finished */
767 unsigned long when_received
; /* when demux complete (taken off wire) */
769 mid_receive_t
*receive
; /* call receive callback */
770 mid_callback_t
*callback
; /* call completion callback */
771 void *callback_data
; /* general purpose pointer for callback */
772 void *resp_buf
; /* pointer to received SMB header */
773 int mid_state
; /* wish this were enum but can not pass to wait_event */
774 __le16 command
; /* smb command code */
775 bool large_buf
:1; /* if valid response, is pointer to large buf */
776 bool multiRsp
:1; /* multiple trans2 responses for one request */
777 bool multiEnd
:1; /* both received */
780 /* Make code in transport.c a little cleaner by moving
781 update of optional stats into function below */
782 #ifdef CONFIG_CIFS_STATS2
784 static inline void cifs_in_send_inc(struct TCP_Server_Info
*server
)
786 atomic_inc(&server
->in_send
);
789 static inline void cifs_in_send_dec(struct TCP_Server_Info
*server
)
791 atomic_dec(&server
->in_send
);
794 static inline void cifs_num_waiters_inc(struct TCP_Server_Info
*server
)
796 atomic_inc(&server
->num_waiters
);
799 static inline void cifs_num_waiters_dec(struct TCP_Server_Info
*server
)
801 atomic_dec(&server
->num_waiters
);
804 static inline void cifs_save_when_sent(struct mid_q_entry
*mid
)
806 mid
->when_sent
= jiffies
;
809 static inline void cifs_in_send_inc(struct TCP_Server_Info
*server
)
812 static inline void cifs_in_send_dec(struct TCP_Server_Info
*server
)
816 static inline void cifs_num_waiters_inc(struct TCP_Server_Info
*server
)
820 static inline void cifs_num_waiters_dec(struct TCP_Server_Info
*server
)
824 static inline void cifs_save_when_sent(struct mid_q_entry
*mid
)
829 /* for pending dnotify requests */
830 struct dir_notify_req
{
831 struct list_head lhead
;
838 __u32 filter
; /* CompletionFilter (for multishot) */
843 struct dfs_info3_param
{
844 int flags
; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
853 * common struct for holding inode info when searching for or updating an
854 * inode with new info
857 #define CIFS_FATTR_DFS_REFERRAL 0x1
858 #define CIFS_FATTR_DELETE_PENDING 0x2
859 #define CIFS_FATTR_NEED_REVAL 0x4
860 #define CIFS_FATTR_INO_COLLISION 0x8
873 unsigned int cf_nlink
;
874 unsigned int cf_dtype
;
875 struct timespec cf_atime
;
876 struct timespec cf_mtime
;
877 struct timespec cf_ctime
;
880 static inline void free_dfs_info_param(struct dfs_info3_param
*param
)
883 kfree(param
->path_name
);
884 kfree(param
->node_name
);
889 static inline void free_dfs_info_array(struct dfs_info3_param
*param
,
893 if ((number_of_items
== 0) || (param
== NULL
))
895 for (i
= 0; i
< number_of_items
; i
++) {
896 kfree(param
[i
].path_name
);
897 kfree(param
[i
].node_name
);
903 #define MID_REQUEST_ALLOCATED 1
904 #define MID_REQUEST_SUBMITTED 2
905 #define MID_RESPONSE_RECEIVED 4
906 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
907 #define MID_RESPONSE_MALFORMED 0x10
908 #define MID_SHUTDOWN 0x20
910 /* Types of response buffer returned from SendReceive2 */
911 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
912 #define CIFS_SMALL_BUFFER 1
913 #define CIFS_LARGE_BUFFER 2
914 #define CIFS_IOVEC 4 /* array of response buffers */
916 /* Type of Request to SendReceive2 */
917 #define CIFS_BLOCKING_OP 1 /* operation can block */
918 #define CIFS_ASYNC_OP 2 /* do not wait for response */
919 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
920 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
921 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
922 #define CIFS_NO_RESP 0x040 /* no response buffer required */
924 /* Security Flags: indicate type of session setup needed */
925 #define CIFSSEC_MAY_SIGN 0x00001
926 #define CIFSSEC_MAY_NTLM 0x00002
927 #define CIFSSEC_MAY_NTLMV2 0x00004
928 #define CIFSSEC_MAY_KRB5 0x00008
929 #ifdef CONFIG_CIFS_WEAK_PW_HASH
930 #define CIFSSEC_MAY_LANMAN 0x00010
931 #define CIFSSEC_MAY_PLNTXT 0x00020
933 #define CIFSSEC_MAY_LANMAN 0
934 #define CIFSSEC_MAY_PLNTXT 0
935 #endif /* weak passwords */
936 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
937 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
939 #define CIFSSEC_MUST_SIGN 0x01001
940 /* note that only one of the following can be set so the
941 result of setting MUST flags more than once will be to
942 require use of the stronger protocol */
943 #define CIFSSEC_MUST_NTLM 0x02002
944 #define CIFSSEC_MUST_NTLMV2 0x04004
945 #define CIFSSEC_MUST_KRB5 0x08008
946 #ifdef CONFIG_CIFS_WEAK_PW_HASH
947 #define CIFSSEC_MUST_LANMAN 0x10010
948 #define CIFSSEC_MUST_PLNTXT 0x20020
949 #ifdef CONFIG_CIFS_UPCALL
950 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
952 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
954 #else /* do not allow weak pw hash */
955 #define CIFSSEC_MUST_LANMAN 0
956 #define CIFSSEC_MUST_PLNTXT 0
957 #ifdef CONFIG_CIFS_UPCALL
958 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
960 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
962 #endif /* WEAK_PW_HASH */
963 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
964 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
966 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
967 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
968 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
970 *****************************************************************
971 * All constants go here
972 *****************************************************************
975 #define UID_HASH (16)
978 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
979 * following to be declared.
982 /****************************************************************************
983 * Locking notes. All updates to global variables and lists should be
984 * protected by spinlocks or semaphores.
988 * GlobalMid_Lock protects:
989 * list operations on pending_mid_q and oplockQ
990 * updates to XID counters, multiplex id and SMB sequence numbers
991 * cifs_file_list_lock protects:
992 * list operations on tcp and SMB session lists and tCon lists
993 * f_owner.lock protects certain per file struct operations
994 * mapping->page_lock protects certain per page operations
998 * sesSem operations on smb session
999 * tconSem operations on tree connection
1000 * fh_sem file handle reconnection operations
1002 ****************************************************************************/
1004 #ifdef DECLARE_GLOBALS_HERE
1005 #define GLOBAL_EXTERN
1007 #define GLOBAL_EXTERN extern
1011 * the list of TCP_Server_Info structures, ie each of the sockets
1012 * connecting our client to a distinct server (ip address), is
1013 * chained together by cifs_tcp_ses_list. The list of all our SMB
1014 * sessions (and from that the tree connections) can be found
1015 * by iterating over cifs_tcp_ses_list
1017 GLOBAL_EXTERN
struct list_head cifs_tcp_ses_list
;
1020 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1021 * tcp session, and the list of tcon's per smb session. It also protects
1022 * the reference counters for the server, smb session, and tcon. Finally,
1023 * changes to the tcon->tidStatus should be done while holding this lock.
1025 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock
;
1028 * This lock protects the cifs_file->llist and cifs_file->flist
1029 * list operations, and updates to some flags (cifs_file->invalidHandle)
1030 * It will be moved to either use the tcon->stat_lock or equivalent later.
1031 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1032 * the cifs_tcp_ses_lock must be grabbed first and released last.
1034 GLOBAL_EXTERN spinlock_t cifs_file_list_lock
;
1036 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1037 /* Outstanding dir notify requests */
1038 GLOBAL_EXTERN
struct list_head GlobalDnotifyReqList
;
1039 /* DirNotify response queue */
1040 GLOBAL_EXTERN
struct list_head GlobalDnotifyRsp_Q
;
1041 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1044 * Global transaction id (XID) information
1046 GLOBAL_EXTERN
unsigned int GlobalCurrentXid
; /* protected by GlobalMid_Sem */
1047 GLOBAL_EXTERN
unsigned int GlobalTotalActiveXid
; /* prot by GlobalMid_Sem */
1048 GLOBAL_EXTERN
unsigned int GlobalMaxActiveXid
; /* prot by GlobalMid_Sem */
1049 GLOBAL_EXTERN spinlock_t GlobalMid_Lock
; /* protects above & list operations */
1050 /* on midQ entries */
1052 * Global counters, updated atomically
1054 GLOBAL_EXTERN atomic_t sesInfoAllocCount
;
1055 GLOBAL_EXTERN atomic_t tconInfoAllocCount
;
1056 GLOBAL_EXTERN atomic_t tcpSesAllocCount
;
1057 GLOBAL_EXTERN atomic_t tcpSesReconnectCount
;
1058 GLOBAL_EXTERN atomic_t tconInfoReconnectCount
;
1060 /* Various Debug counters */
1061 GLOBAL_EXTERN atomic_t bufAllocCount
; /* current number allocated */
1062 #ifdef CONFIG_CIFS_STATS2
1063 GLOBAL_EXTERN atomic_t totBufAllocCount
; /* total allocated over all time */
1064 GLOBAL_EXTERN atomic_t totSmBufAllocCount
;
1066 GLOBAL_EXTERN atomic_t smBufAllocCount
;
1067 GLOBAL_EXTERN atomic_t midCount
;
1070 GLOBAL_EXTERN
bool enable_oplocks
; /* enable or disable oplocks */
1071 GLOBAL_EXTERN
unsigned int lookupCacheEnabled
;
1072 GLOBAL_EXTERN
unsigned int global_secflags
; /* if on, session setup sent
1073 with more secure ntlmssp2 challenge/resp */
1074 GLOBAL_EXTERN
unsigned int sign_CIFS_PDUs
; /* enable smb packet signing */
1075 GLOBAL_EXTERN
unsigned int linuxExtEnabled
;/*enable Linux/Unix CIFS extensions*/
1076 GLOBAL_EXTERN
unsigned int CIFSMaxBufSize
; /* max size not including hdr */
1077 GLOBAL_EXTERN
unsigned int cifs_min_rcv
; /* min size of big ntwrk buf pool */
1078 GLOBAL_EXTERN
unsigned int cifs_min_small
; /* min size of small buf pool */
1079 GLOBAL_EXTERN
unsigned int cifs_max_pending
; /* MAX requests at once to server*/
1081 #ifdef CONFIG_CIFS_ACL
1082 GLOBAL_EXTERN
struct rb_root uidtree
;
1083 GLOBAL_EXTERN
struct rb_root gidtree
;
1084 GLOBAL_EXTERN spinlock_t siduidlock
;
1085 GLOBAL_EXTERN spinlock_t sidgidlock
;
1086 GLOBAL_EXTERN
struct rb_root siduidtree
;
1087 GLOBAL_EXTERN
struct rb_root sidgidtree
;
1088 GLOBAL_EXTERN spinlock_t uidsidlock
;
1089 GLOBAL_EXTERN spinlock_t gidsidlock
;
1090 #endif /* CONFIG_CIFS_ACL */
1092 void cifs_oplock_break(struct work_struct
*work
);
1094 extern const struct slow_work_ops cifs_oplock_break_ops
;
1095 extern struct workqueue_struct
*cifsiod_wq
;
1097 /* Operations for different SMB versions */
1098 #define SMB1_VERSION_STRING "1.0"
1099 extern struct smb_version_operations smb1_operations
;
1100 extern struct smb_version_values smb1_values
;
1101 #endif /* _CIFS_GLOB_H */