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
36 * The sizes of various internal tables and strings
38 #define MAX_UID_INFO 16
39 #define MAX_SES_INFO 2
40 #define MAX_TCON_INFO 4
42 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
43 #define MAX_SERVER_SIZE 15
44 #define MAX_SHARE_SIZE 80
45 #define MAX_USERNAME_SIZE 256 /* reasonable maximum for current servers */
46 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
48 #define CIFS_MIN_RCV_POOL 4
50 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
52 * default attribute cache timeout (jiffies)
54 #define CIFS_DEF_ACTIMEO (1 * HZ)
57 * max attribute cache timeout (jiffies) - 2^30
59 #define CIFS_MAX_ACTIMEO (1 << 30)
62 * MAX_REQ is the maximum number of requests that WE will send
63 * on one socket concurrently.
65 #define CIFS_MAX_REQ 32767
67 #define RFC1001_NAME_LEN 15
68 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
70 /* currently length of NIP6_FMT */
71 #define SERVER_NAME_LENGTH 40
72 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
74 /* used to define string lengths for reversing unicode strings */
76 /* (max path length + 1 for null) * 2 for unicode */
79 /* SMB echo "timeout" -- FIXME: tunable? */
80 #define SMB_ECHO_INTERVAL (60 * HZ)
84 #ifndef XATTR_DOS_ATTRIB
85 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
89 * CIFS vfs client Status information (based on what we know.)
92 /* associated with each tcp and smb session */
102 LANMAN = 0, /* Legacy LANMAN auth */
103 NTLM, /* Legacy NTLM012 auth with NTLM hash */
104 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
105 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
106 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
107 Kerberos, /* Kerberos via SPNEGO */
113 /* Netbios frames protocol not supported at this time */
121 /* crypto security descriptor definition */
123 struct shash_desc shash;
127 /* crypto hashing related structure/fields, not specific to a sec mech */
128 struct cifs_secmech {
129 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
130 struct crypto_shash *md5; /* md5 hash function */
131 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
132 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
135 /* per smb session structure/fields */
136 struct ntlmssp_auth {
137 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
138 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
139 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
140 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
148 struct cifs_sid osid;
149 struct cifs_sid gsid;
150 struct cifs_ntace *ntaces;
151 struct cifs_ace *aces;
155 *****************************************************************
156 * Except the CIFS PDUs themselves all the
157 * globally interesting structs should go here
158 *****************************************************************
167 struct TCP_Server_Info;
171 struct dfs_info3_param;
175 struct cifs_readdata;
176 struct cifs_writedata;
178 struct smb_version_operations {
179 int (*send_cancel)(struct TCP_Server_Info *, void *,
180 struct mid_q_entry *);
181 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
182 /* setup request: allocate mid, sign message */
183 int (*setup_request)(struct cifs_ses *, struct kvec *, unsigned int,
184 struct mid_q_entry **);
185 /* setup async request: allocate mid, sign message */
186 int (*setup_async_request)(struct TCP_Server_Info *, struct kvec *,
187 unsigned int, struct mid_q_entry **);
188 /* check response: verify signature, map error */
189 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
191 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
193 void (*set_credits)(struct TCP_Server_Info *, const int);
194 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
195 unsigned int (*get_credits)(struct mid_q_entry *);
196 __u64 (*get_next_mid)(struct TCP_Server_Info *);
197 /* data offset from read response message */
198 unsigned int (*read_data_offset)(char *);
199 /* data length from read response message */
200 unsigned int (*read_data_length)(char *);
201 /* map smb to linux error */
202 int (*map_error)(char *, bool);
203 /* find mid corresponding to the response message */
204 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
205 void (*dump_detail)(void *);
206 void (*clear_stats)(struct cifs_tcon *);
207 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
208 /* verify the message */
209 int (*check_message)(char *, unsigned int);
210 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
211 /* process transaction2 response */
212 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
214 /* check if we need to negotiate */
215 bool (*need_neg)(struct TCP_Server_Info *);
216 /* negotiate to the server */
217 int (*negotiate)(const unsigned int, struct cifs_ses *);
218 /* set negotiated write size */
219 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
220 /* set negotiated read size */
221 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
222 /* setup smb sessionn */
223 int (*sess_setup)(const unsigned int, struct cifs_ses *,
224 const struct nls_table *);
225 /* close smb session */
226 int (*logoff)(const unsigned int, struct cifs_ses *);
227 /* connect to a server share */
228 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
229 struct cifs_tcon *, const struct nls_table *);
230 /* close tree connecion */
231 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
232 /* get DFS referrals */
233 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
234 const char *, struct dfs_info3_param **,
235 unsigned int *, const struct nls_table *, int);
236 /* informational QFS call */
237 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
238 /* check if a path is accessible or not */
239 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
240 struct cifs_sb_info *, const char *);
241 /* query path data from the server */
242 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
243 struct cifs_sb_info *, const char *,
244 FILE_ALL_INFO *, bool *);
245 /* query file data from the server */
246 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
247 struct cifs_fid *, FILE_ALL_INFO *);
248 /* get server index number */
249 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
250 struct cifs_sb_info *, const char *,
251 u64 *uniqueid, FILE_ALL_INFO *);
252 /* build a full path to the root of the mount */
253 char * (*build_path_to_root)(struct smb_vol *, struct cifs_sb_info *,
255 /* check if we can send an echo or nor */
256 bool (*can_echo)(struct TCP_Server_Info *);
257 /* send echo request */
258 int (*echo)(struct TCP_Server_Info *);
259 /* create directory */
260 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
261 struct cifs_sb_info *);
262 /* set info on created directory */
263 void (*mkdir_setinfo)(struct inode *, const char *,
264 struct cifs_sb_info *, struct cifs_tcon *,
266 /* remove directory */
267 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
268 struct cifs_sb_info *);
270 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
271 struct cifs_sb_info *);
272 /* open, rename and delete file */
273 int (*rename_pending_delete)(const char *, struct dentry *,
275 /* open a file for non-posix mounts */
276 int (*open)(const unsigned int, struct cifs_tcon *, const char *, int,
277 int, int, struct cifs_fid *, __u32 *, FILE_ALL_INFO *,
278 struct cifs_sb_info *);
279 /* set fid protocol-specific info */
280 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
282 int (*close)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
283 /* send a flush request to the server */
284 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
285 /* async read from the server */
286 int (*async_readv)(struct cifs_readdata *);
287 /* async write to the server */
288 int (*async_writev)(struct cifs_writedata *);
291 struct smb_version_values {
292 char *version_string;
293 __u32 large_lock_type;
294 __u32 exclusive_lock_type;
295 __u32 shared_lock_type;
296 __u32 unlock_lock_type;
298 size_t max_header_size;
299 size_t read_rsp_size;
301 unsigned int cap_unix;
302 unsigned int cap_nt_find;
303 unsigned int cap_large_files;
306 #define HEADER_SIZE(server) (server->vals->header_size)
307 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
315 char *iocharset; /* local code page for mapping to and from Unicode */
316 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
317 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
333 bool no_psx_acl:1; /* set if posix acl support should be disabled */
335 bool backupuid_specified; /* mount option backupuid is specified */
336 bool backupgid_specified; /* mount option backupgid is specified */
337 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
338 bool server_ino:1; /* use inode numbers from server ie UniqueId */
340 bool strict_io:1; /* strict cache behavior */
341 bool remap:1; /* set to remap seven reserved chars in filenames */
342 bool posix_paths:1; /* unset to not ask for posix pathnames. */
345 bool nullauth:1; /* attempt to authenticate with null user */
346 bool nocase:1; /* request case insensitive filenames */
347 bool nobrl:1; /* disable sending byte range locks to srv */
348 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
349 bool seal:1; /* request transport encryption on share */
350 bool nodfs:1; /* Do not request DFS, even if available */
351 bool local_lease:1; /* check leases only on local system, not remote */
354 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
355 bool fsc:1; /* enable fscache */
356 bool mfsymlinks:1; /* use Minshall+French Symlinks */
358 bool rwpidforward:1; /* pid forward for read/write operations */
361 bool sockopt_tcp_nodelay:1;
362 unsigned short int port;
363 unsigned long actimeo; /* attribute cache timeout (jiffies) */
364 struct smb_version_operations *ops;
365 struct smb_version_values *vals;
367 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
368 struct nls_table *local_nls;
371 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
372 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
373 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
374 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
375 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
376 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
377 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
378 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
379 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
380 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
382 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
383 MS_NODEV | MS_SYNCHRONOUS)
385 struct cifs_mnt_data {
386 struct cifs_sb_info *cifs_sb;
391 static inline unsigned int
392 get_rfc1002_length(void *buf)
394 return be32_to_cpu(*((__be32 *)buf));
398 inc_rfc1001_len(void *buf, int count)
400 be32_add_cpu((__be32 *)buf, count);
403 struct TCP_Server_Info {
404 struct list_head tcp_ses_list;
405 struct list_head smb_ses_list;
406 int srv_count; /* reference counter */
407 /* 15 character server name + 0x20 16th byte indicating type = srv */
408 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
409 struct smb_version_operations *ops;
410 struct smb_version_values *vals;
411 enum statusEnum tcpStatus; /* what we think the status is */
412 char *hostname; /* hostname portion of UNC string */
413 struct socket *ssocket;
414 struct sockaddr_storage dstaddr;
415 struct sockaddr_storage srcaddr; /* locally bind to this IP */
419 wait_queue_head_t response_q;
420 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
421 struct list_head pending_mid_q;
422 bool noblocksnd; /* use blocking sendmsg */
423 bool noautotune; /* do not autotune send buf sizes */
425 int credits; /* send no more requests at once */
426 unsigned int in_flight; /* number of requests on the wire to server */
427 spinlock_t req_lock; /* protect the two values above */
428 struct mutex srv_mutex;
429 struct task_struct *tsk;
430 char server_GUID[16];
432 bool session_estab; /* mark when very first sess is established */
433 #ifdef CONFIG_CIFS_SMB2
434 int echo_credits; /* echo reserved slots */
435 int oplock_credits; /* oplock break reserved slots */
436 bool echoes:1; /* enable echoes */
438 u16 dialect; /* dialect index that server chose */
439 enum securityEnum secType;
440 bool oplocks:1; /* enable oplocks */
441 unsigned int maxReq; /* Clients should submit no more */
442 /* than maxReq distinct unanswered SMBs to the server when using */
443 /* multiplexed reads or writes */
444 unsigned int maxBuf; /* maxBuf specifies the maximum */
445 /* message size the server can send or receive for non-raw SMBs */
446 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
447 /* when socket is setup (and during reconnect) before NegProt sent */
448 unsigned int max_rw; /* maxRw specifies the maximum */
449 /* message size the server can send or receive for */
450 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
451 unsigned int max_vcs; /* maximum number of smb sessions, at least
452 those that can be specified uniquely with
454 unsigned int capabilities; /* selective disabling of caps by smb sess */
455 int timeAdj; /* Adjust for difference in server time zone in sec */
456 __u64 CurrentMid; /* multiplex id - rotating counter */
457 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
458 /* 16th byte of RFC1001 workstation name is always null */
459 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
460 __u32 sequence_number; /* for signing, protected by srv_mutex */
461 struct session_key session_key;
462 unsigned long lstrp; /* when we got last response from this server */
463 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
464 /* extended security flavors that server supports */
465 bool sec_ntlmssp; /* supports NTLMSSP */
466 bool sec_kerberosu2u; /* supports U2U Kerberos */
467 bool sec_kerberos; /* supports plain Kerberos */
468 bool sec_mskerberos; /* supports legacy MS Kerberos */
469 bool large_buf; /* is current buffer large? */
470 struct delayed_work echo; /* echo ping workqueue job */
471 struct kvec *iov; /* reusable kvec array for receives */
472 unsigned int nr_iov; /* number of kvecs in array */
473 char *smallbuf; /* pointer to current "small" buffer */
474 char *bigbuf; /* pointer to current "big" buffer */
475 unsigned int total_read; /* total amount of data read in this pass */
476 #ifdef CONFIG_CIFS_FSCACHE
477 struct fscache_cookie *fscache; /* client index cache cookie */
479 #ifdef CONFIG_CIFS_STATS2
480 atomic_t in_send; /* requests trying to send */
481 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
483 #ifdef CONFIG_CIFS_SMB2
484 unsigned int max_read;
485 unsigned int max_write;
486 #endif /* CONFIG_CIFS_SMB2 */
489 static inline unsigned int
490 in_flight(struct TCP_Server_Info *server)
493 spin_lock(&server->req_lock);
494 num = server->in_flight;
495 spin_unlock(&server->req_lock);
500 has_credits(struct TCP_Server_Info *server, int *credits)
503 spin_lock(&server->req_lock);
505 spin_unlock(&server->req_lock);
510 add_credits(struct TCP_Server_Info *server, const unsigned int add,
513 server->ops->add_credits(server, add, optype);
517 set_credits(struct TCP_Server_Info *server, const int val)
519 server->ops->set_credits(server, val);
523 get_next_mid(struct TCP_Server_Info *server)
525 return server->ops->get_next_mid(server);
529 * When the server supports very large reads and writes via POSIX extensions,
530 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
531 * including the RFC1001 length.
533 * Note that this might make for "interesting" allocation problems during
534 * writeback however as we have to allocate an array of pointers for the
535 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
537 * For reads, there is a similar problem as we need to allocate an array
538 * of kvecs to handle the receive, though that should only need to be done
541 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
542 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
545 * When the server doesn't allow large posix writes, only allow a rsize/wsize
546 * of 2^17-1 minus the size of the call header. That allows for a read or
547 * write up to the maximum size described by RFC1002.
549 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
550 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
553 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
554 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
555 * a single wsize request with a single call.
557 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
560 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
561 * those values when posix extensions aren't in force. In actuality here, we
562 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
563 * to be ok with the extra byte even though Windows doesn't send writes that
568 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
570 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
571 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
574 * On hosts with high memory, we can't currently support wsize/rsize that are
575 * larger than we can kmap at once. Cap the rsize/wsize at
576 * LAST_PKMAP * PAGE_SIZE. We'll never be able to fill a read or write request
577 * larger than that anyway.
579 #ifdef CONFIG_HIGHMEM
580 #define CIFS_KMAP_SIZE_LIMIT (LAST_PKMAP * PAGE_CACHE_SIZE)
581 #else /* CONFIG_HIGHMEM */
582 #define CIFS_KMAP_SIZE_LIMIT (1<<24)
583 #endif /* CONFIG_HIGHMEM */
585 #ifdef CONFIG_HIGHMEM
587 * On arches that have high memory, kmap address space is limited. By
588 * serializing the kmap operations on those arches, we ensure that we don't
589 * end up with a bunch of threads in writeback with partially mapped page
590 * arrays, stuck waiting for kmap to come back. That situation prevents
591 * progress and can deadlock.
594 extern struct mutex cifs_kmap_mutex;
599 mutex_lock(&cifs_kmap_mutex);
603 cifs_kmap_unlock(void)
605 mutex_unlock(&cifs_kmap_mutex);
607 #else /* !CONFIG_HIGHMEM */
608 #define cifs_kmap_lock() do { ; } while (0)
609 #define cifs_kmap_unlock() do { ; } while (0)
610 #endif /* CONFIG_HIGHMEM */
613 * Macros to allow the TCP_Server_Info->net field and related code to drop out
614 * when CONFIG_NET_NS isn't set.
619 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
624 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
631 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
636 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
643 * Session structure. One of these for each uid session with a particular host
646 struct list_head smb_ses_list;
647 struct list_head tcon_list;
648 struct mutex session_mutex;
649 struct TCP_Server_Info *server; /* pointer to server info */
650 int ses_count; /* reference counter */
651 enum statusEnum status;
652 unsigned overrideSecFlg; /* if non-zero override global sec flags */
653 __u16 ipc_tid; /* special tid for connection to IPC share */
656 char *serverOS; /* name of operating system underlying server */
657 char *serverNOS; /* name of network operating system of server */
658 char *serverDomain; /* security realm of server */
659 __u64 Suid; /* remote smb uid */
660 uid_t linux_uid; /* overriding owner of files on the mount */
661 uid_t cred_uid; /* owner of credentials */
662 unsigned int capabilities;
663 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
664 TCP names - will ipv6 and sctp addresses fit? */
665 char *user_name; /* must not be null except during init of sess
666 and after mount option parsing we fill it */
669 struct session_key auth_key;
670 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
671 bool need_reconnect:1; /* connection reset, uid now invalid */
672 #ifdef CONFIG_CIFS_SMB2
674 #endif /* CONFIG_CIFS_SMB2 */
676 /* no more than one of the following three session flags may be set */
677 #define CIFS_SES_NT4 1
678 #define CIFS_SES_OS2 2
679 #define CIFS_SES_W9X 4
680 /* following flag is set for old servers such as OS2 (and Win95?)
681 which do not negotiate NTLM or POSIX dialects, but instead
682 negotiate one of the older LANMAN dialects */
683 #define CIFS_SES_LANMAN 8
686 cap_unix(struct cifs_ses *ses)
688 return ses->server->vals->cap_unix & ses->capabilities;
692 * there is one of these for each connection to a resource on a particular
696 struct list_head tcon_list;
698 struct list_head openFileList;
699 struct cifs_ses *ses; /* pointer to session associated with */
700 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
701 char *nativeFileSystem;
702 char *password; /* for share-level security */
703 __u32 tid; /* The 4 byte tree id */
704 __u16 Flags; /* optional support bits */
705 enum statusEnum tidStatus;
706 #ifdef CONFIG_CIFS_STATS
707 atomic_t num_smbs_sent;
712 atomic_t num_flushes;
713 atomic_t num_oplock_brks;
716 atomic_t num_deletes;
718 atomic_t num_posixopens;
719 atomic_t num_posixmkdirs;
721 atomic_t num_renames;
722 atomic_t num_t2renames;
726 atomic_t num_hardlinks;
727 atomic_t num_symlinks;
729 atomic_t num_acl_get;
730 atomic_t num_acl_set;
732 #ifdef CONFIG_CIFS_SMB2
734 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
735 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
737 #endif /* CONFIG_CIFS_SMB2 */
739 #ifdef CONFIG_CIFS_STATS2
740 unsigned long long time_writes;
741 unsigned long long time_reads;
742 unsigned long long time_opens;
743 unsigned long long time_deletes;
744 unsigned long long time_closes;
745 unsigned long long time_mkdirs;
746 unsigned long long time_rmdirs;
747 unsigned long long time_renames;
748 unsigned long long time_t2renames;
749 unsigned long long time_ffirst;
750 unsigned long long time_fnext;
751 unsigned long long time_fclose;
752 #endif /* CONFIG_CIFS_STATS2 */
755 spinlock_t stat_lock;
756 #endif /* CONFIG_CIFS_STATS */
757 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
758 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
759 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
760 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
763 bool seal:1; /* transport encryption for this mounted share */
764 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
765 for this mount even if server would support */
766 bool local_lease:1; /* check leases (only) on local system not remote */
767 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
768 bool need_reconnect:1; /* connection reset, tid now invalid */
769 #ifdef CONFIG_CIFS_SMB2
770 bool print:1; /* set if connection to printer share */
771 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
774 __u32 maximal_access;
775 __u32 vol_serial_number;
776 __le64 vol_create_time;
777 #endif /* CONFIG_CIFS_SMB2 */
778 #ifdef CONFIG_CIFS_FSCACHE
779 u64 resource_id; /* server resource id */
780 struct fscache_cookie *fscache; /* cookie for share */
782 /* BB add field for back pointer to sb struct(s)? */
786 * This is a refcounted and timestamped container for a tcon pointer. The
787 * container holds a tcon reference. It is considered safe to free one of
788 * these when the tl_count goes to 0. The tl_time is the time of the last
789 * "get" on the container.
792 struct rb_node tl_rbnode;
794 unsigned long tl_flags;
795 #define TCON_LINK_MASTER 0
796 #define TCON_LINK_PENDING 1
797 #define TCON_LINK_IN_TREE 2
798 unsigned long tl_time;
800 struct cifs_tcon *tl_tcon;
803 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
805 static inline struct cifs_tcon *
806 tlink_tcon(struct tcon_link *tlink)
808 return tlink->tl_tcon;
811 extern void cifs_put_tlink(struct tcon_link *tlink);
813 static inline struct tcon_link *
814 cifs_get_tlink(struct tcon_link *tlink)
816 if (tlink && !IS_ERR(tlink))
817 atomic_inc(&tlink->tl_count);
821 /* This function is always expected to succeed */
822 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
825 * This info hangs off the cifsFileInfo structure, pointed to by llist.
826 * This is used to track byte stream locks on the file
828 struct cifsLockInfo {
829 struct list_head llist; /* pointer to next cifsLockInfo */
830 struct list_head blist; /* pointer to locks blocked on this */
831 wait_queue_head_t block_q;
839 * One of these for each open instance of a file
841 struct cifs_search_info {
842 loff_t index_of_last_entry;
843 __u16 entries_in_buffer;
846 char *ntwrk_buf_start;
847 char *srch_entries_start;
849 const char *presume_name;
850 unsigned int resume_name_len;
854 bool smallBuf:1; /* so we know which buf_release function to call */
859 #ifdef CONFIG_CIFS_SMB2
860 __u64 persistent_fid; /* persist file id for smb2 */
861 __u64 volatile_fid; /* volatile file id for smb2 */
865 struct cifsFileInfo {
866 struct list_head tlist; /* pointer to next fid owned by tcon */
867 struct list_head flist; /* next fid (file instance) for this inode */
868 struct list_head llist; /*
869 * brlocks held by this fid, protected by
870 * lock_mutex from cifsInodeInfo structure
872 unsigned int uid; /* allows finding which FileInfo structure */
873 __u32 pid; /* process id who opened file */
874 struct cifs_fid fid; /* file id from remote */
875 /* BB add lock scope info here if needed */ ;
876 /* lock scope id (0 if none) */
877 struct dentry *dentry;
878 unsigned int f_flags;
879 struct tcon_link *tlink;
880 bool invalidHandle:1; /* file closed via session abend */
881 bool oplock_break_cancelled:1;
882 int count; /* refcount protected by cifs_file_list_lock */
883 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
884 struct cifs_search_info srch_inf;
885 struct work_struct oplock_break; /* work for oplock breaks */
888 struct cifs_io_parms {
890 #ifdef CONFIG_CIFS_SMB2
891 __u64 persistent_fid; /* persist file id for smb2 */
892 __u64 volatile_fid; /* volatile file id for smb2 */
897 struct cifs_tcon *tcon;
900 struct cifs_readdata;
902 /* asynchronous read support */
903 struct cifs_readdata {
904 struct kref refcount;
905 struct list_head list;
906 struct completion done;
907 struct cifsFileInfo *cfile;
908 struct address_space *mapping;
913 struct list_head pages;
914 struct work_struct work;
915 int (*marshal_iov) (struct cifs_readdata *rdata,
916 unsigned int remaining);
921 struct cifs_writedata;
923 /* asynchronous write support */
924 struct cifs_writedata {
925 struct kref refcount;
926 struct list_head list;
927 struct completion done;
928 enum writeback_sync_modes sync_mode;
929 struct work_struct work;
930 struct cifsFileInfo *cfile;
935 void (*marshal_iov) (struct kvec *iov,
936 struct cifs_writedata *wdata);
937 unsigned int nr_pages;
938 struct page *pages[1];
942 * Take a reference on the file private data. Must be called with
943 * cifs_file_list_lock held.
946 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
951 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
952 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
955 * One of these for each file inode
958 struct cifsInodeInfo {
959 bool can_cache_brlcks;
960 struct mutex lock_mutex; /*
961 * protect the field above and llist
962 * from every cifsFileInfo structure
965 /* BB add in lists for dirty pages i.e. write caching info for oplock */
966 struct list_head openFileList;
967 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
968 bool clientCanCacheRead; /* read oplock */
969 bool clientCanCacheAll; /* read and writebehind oplock */
970 bool delete_pending; /* DELETE_ON_CLOSE is set */
971 bool invalid_mapping; /* pagecache is invalid */
972 unsigned long time; /* jiffies of last update of inode */
973 u64 server_eof; /* current file size on server -- protected by i_lock */
974 u64 uniqueid; /* server inode number */
975 u64 createtime; /* creation time on server */
976 #ifdef CONFIG_CIFS_FSCACHE
977 struct fscache_cookie *fscache;
979 struct inode vfs_inode;
982 static inline struct cifsInodeInfo *
983 CIFS_I(struct inode *inode)
985 return container_of(inode, struct cifsInodeInfo, vfs_inode);
988 static inline struct cifs_sb_info *
989 CIFS_SB(struct super_block *sb)
991 return sb->s_fs_info;
994 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
996 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1003 convert_delimiter(char *path, char delim)
1016 for (i = 0; path[i] != '\0'; i++) {
1017 if (path[i] == old_delim)
1022 static inline char *
1023 build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
1024 struct cifs_tcon *tcon)
1026 if (!vol->ops->build_path_to_root)
1028 return vol->ops->build_path_to_root(vol, cifs_sb, tcon);
1031 #ifdef CONFIG_CIFS_STATS
1032 #define cifs_stats_inc atomic_inc
1034 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1038 spin_lock(&tcon->stat_lock);
1039 tcon->bytes_written += bytes;
1040 spin_unlock(&tcon->stat_lock);
1044 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1047 spin_lock(&tcon->stat_lock);
1048 tcon->bytes_read += bytes;
1049 spin_unlock(&tcon->stat_lock);
1053 #define cifs_stats_inc(field) do {} while (0)
1054 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1055 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1061 * This is the prototype for the mid receive function. This function is for
1062 * receiving the rest of the SMB frame, starting with the WordCount (which is
1063 * just after the MID in struct smb_hdr). Note:
1065 * - This will be called by cifsd, with no locks held.
1066 * - The mid will still be on the pending_mid_q.
1067 * - mid->resp_buf will point to the current buffer.
1069 * Returns zero on a successful receive, or an error. The receive state in
1070 * the TCP_Server_Info will also be updated.
1072 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1073 struct mid_q_entry *mid);
1076 * This is the prototype for the mid callback function. This is called once the
1077 * mid has been received off of the socket. When creating one, take special
1078 * care to avoid deadlocks. Things to bear in mind:
1080 * - it will be called by cifsd, with no locks held
1081 * - the mid will be removed from any lists
1083 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1085 /* one of these for every pending CIFS request to the server */
1086 struct mid_q_entry {
1087 struct list_head qhead; /* mids waiting on reply from this server */
1088 struct TCP_Server_Info *server; /* server corresponding to this mid */
1089 __u64 mid; /* multiplex id */
1090 __u32 pid; /* process id */
1091 __u32 sequence_number; /* for CIFS signing */
1092 unsigned long when_alloc; /* when mid was created */
1093 #ifdef CONFIG_CIFS_STATS2
1094 unsigned long when_sent; /* time when smb send finished */
1095 unsigned long when_received; /* when demux complete (taken off wire) */
1097 mid_receive_t *receive; /* call receive callback */
1098 mid_callback_t *callback; /* call completion callback */
1099 void *callback_data; /* general purpose pointer for callback */
1100 void *resp_buf; /* pointer to received SMB header */
1101 int mid_state; /* wish this were enum but can not pass to wait_event */
1102 __le16 command; /* smb command code */
1103 bool large_buf:1; /* if valid response, is pointer to large buf */
1104 bool multiRsp:1; /* multiple trans2 responses for one request */
1105 bool multiEnd:1; /* both received */
1108 /* Make code in transport.c a little cleaner by moving
1109 update of optional stats into function below */
1110 #ifdef CONFIG_CIFS_STATS2
1112 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1114 atomic_inc(&server->in_send);
1117 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1119 atomic_dec(&server->in_send);
1122 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1124 atomic_inc(&server->num_waiters);
1127 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1129 atomic_dec(&server->num_waiters);
1132 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1134 mid->when_sent = jiffies;
1137 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1140 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1144 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1148 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1152 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1157 /* for pending dnotify requests */
1158 struct dir_notify_req {
1159 struct list_head lhead;
1166 __u32 filter; /* CompletionFilter (for multishot) */
1171 struct dfs_info3_param {
1172 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1181 * common struct for holding inode info when searching for or updating an
1182 * inode with new info
1185 #define CIFS_FATTR_DFS_REFERRAL 0x1
1186 #define CIFS_FATTR_DELETE_PENDING 0x2
1187 #define CIFS_FATTR_NEED_REVAL 0x4
1188 #define CIFS_FATTR_INO_COLLISION 0x8
1201 unsigned int cf_nlink;
1202 unsigned int cf_dtype;
1203 struct timespec cf_atime;
1204 struct timespec cf_mtime;
1205 struct timespec cf_ctime;
1208 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1211 kfree(param->path_name);
1212 kfree(param->node_name);
1217 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1218 int number_of_items)
1221 if ((number_of_items == 0) || (param == NULL))
1223 for (i = 0; i < number_of_items; i++) {
1224 kfree(param[i].path_name);
1225 kfree(param[i].node_name);
1231 #define MID_REQUEST_ALLOCATED 1
1232 #define MID_REQUEST_SUBMITTED 2
1233 #define MID_RESPONSE_RECEIVED 4
1234 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1235 #define MID_RESPONSE_MALFORMED 0x10
1236 #define MID_SHUTDOWN 0x20
1238 /* Types of response buffer returned from SendReceive2 */
1239 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1240 #define CIFS_SMALL_BUFFER 1
1241 #define CIFS_LARGE_BUFFER 2
1242 #define CIFS_IOVEC 4 /* array of response buffers */
1244 /* Type of Request to SendReceive2 */
1245 #define CIFS_BLOCKING_OP 1 /* operation can block */
1246 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1247 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1248 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1249 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1250 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1252 /* Type of request operation */
1253 #define CIFS_ECHO_OP 0x080 /* echo request */
1254 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1255 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1256 #define CIFS_OP_MASK 0x0380 /* mask request type */
1258 /* Security Flags: indicate type of session setup needed */
1259 #define CIFSSEC_MAY_SIGN 0x00001
1260 #define CIFSSEC_MAY_NTLM 0x00002
1261 #define CIFSSEC_MAY_NTLMV2 0x00004
1262 #define CIFSSEC_MAY_KRB5 0x00008
1263 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1264 #define CIFSSEC_MAY_LANMAN 0x00010
1265 #define CIFSSEC_MAY_PLNTXT 0x00020
1267 #define CIFSSEC_MAY_LANMAN 0
1268 #define CIFSSEC_MAY_PLNTXT 0
1269 #endif /* weak passwords */
1270 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1271 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1273 #define CIFSSEC_MUST_SIGN 0x01001
1274 /* note that only one of the following can be set so the
1275 result of setting MUST flags more than once will be to
1276 require use of the stronger protocol */
1277 #define CIFSSEC_MUST_NTLM 0x02002
1278 #define CIFSSEC_MUST_NTLMV2 0x04004
1279 #define CIFSSEC_MUST_KRB5 0x08008
1280 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1281 #define CIFSSEC_MUST_LANMAN 0x10010
1282 #define CIFSSEC_MUST_PLNTXT 0x20020
1283 #ifdef CONFIG_CIFS_UPCALL
1284 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1286 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1288 #else /* do not allow weak pw hash */
1289 #define CIFSSEC_MUST_LANMAN 0
1290 #define CIFSSEC_MUST_PLNTXT 0
1291 #ifdef CONFIG_CIFS_UPCALL
1292 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1294 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1296 #endif /* WEAK_PW_HASH */
1297 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1298 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1300 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
1301 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1302 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1304 *****************************************************************
1305 * All constants go here
1306 *****************************************************************
1309 #define UID_HASH (16)
1312 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1313 * following to be declared.
1316 /****************************************************************************
1317 * Locking notes. All updates to global variables and lists should be
1318 * protected by spinlocks or semaphores.
1322 * GlobalMid_Lock protects:
1323 * list operations on pending_mid_q and oplockQ
1324 * updates to XID counters, multiplex id and SMB sequence numbers
1325 * cifs_file_list_lock protects:
1326 * list operations on tcp and SMB session lists and tCon lists
1327 * f_owner.lock protects certain per file struct operations
1328 * mapping->page_lock protects certain per page operations
1332 * sesSem operations on smb session
1333 * tconSem operations on tree connection
1334 * fh_sem file handle reconnection operations
1336 ****************************************************************************/
1338 #ifdef DECLARE_GLOBALS_HERE
1339 #define GLOBAL_EXTERN
1341 #define GLOBAL_EXTERN extern
1345 * the list of TCP_Server_Info structures, ie each of the sockets
1346 * connecting our client to a distinct server (ip address), is
1347 * chained together by cifs_tcp_ses_list. The list of all our SMB
1348 * sessions (and from that the tree connections) can be found
1349 * by iterating over cifs_tcp_ses_list
1351 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1354 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1355 * tcp session, and the list of tcon's per smb session. It also protects
1356 * the reference counters for the server, smb session, and tcon. Finally,
1357 * changes to the tcon->tidStatus should be done while holding this lock.
1359 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1362 * This lock protects the cifs_file->llist and cifs_file->flist
1363 * list operations, and updates to some flags (cifs_file->invalidHandle)
1364 * It will be moved to either use the tcon->stat_lock or equivalent later.
1365 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1366 * the cifs_tcp_ses_lock must be grabbed first and released last.
1368 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1370 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1371 /* Outstanding dir notify requests */
1372 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1373 /* DirNotify response queue */
1374 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1375 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1378 * Global transaction id (XID) information
1380 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1381 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1382 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1383 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1384 /* on midQ entries */
1386 * Global counters, updated atomically
1388 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1389 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1390 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1391 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1392 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1394 /* Various Debug counters */
1395 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1396 #ifdef CONFIG_CIFS_STATS2
1397 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1398 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1400 GLOBAL_EXTERN atomic_t smBufAllocCount;
1401 GLOBAL_EXTERN atomic_t midCount;
1404 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1405 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1406 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1407 with more secure ntlmssp2 challenge/resp */
1408 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1409 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1410 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1411 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1412 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1413 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1415 #ifdef CONFIG_CIFS_ACL
1416 GLOBAL_EXTERN struct rb_root uidtree;
1417 GLOBAL_EXTERN struct rb_root gidtree;
1418 GLOBAL_EXTERN spinlock_t siduidlock;
1419 GLOBAL_EXTERN spinlock_t sidgidlock;
1420 GLOBAL_EXTERN struct rb_root siduidtree;
1421 GLOBAL_EXTERN struct rb_root sidgidtree;
1422 GLOBAL_EXTERN spinlock_t uidsidlock;
1423 GLOBAL_EXTERN spinlock_t gidsidlock;
1424 #endif /* CONFIG_CIFS_ACL */
1426 void cifs_oplock_break(struct work_struct *work);
1428 extern const struct slow_work_ops cifs_oplock_break_ops;
1429 extern struct workqueue_struct *cifsiod_wq;
1431 extern mempool_t *cifs_mid_poolp;
1433 /* Operations for different SMB versions */
1434 #define SMB1_VERSION_STRING "1.0"
1435 extern struct smb_version_operations smb1_operations;
1436 extern struct smb_version_values smb1_values;
1437 #define SMB21_VERSION_STRING "2.1"
1438 extern struct smb_version_operations smb21_operations;
1439 extern struct smb_version_values smb21_values;
1440 #endif /* _CIFS_GLOB_H */