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 LANMAN = 0, /* Legacy LANMAN auth */
105 NTLM, /* Legacy NTLM012 auth with NTLM hash */
106 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
107 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
108 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
109 Kerberos, /* Kerberos via SPNEGO */
115 /* Netbios frames protocol not supported at this time */
123 /* crypto security descriptor definition */
125 struct shash_desc shash;
129 /* crypto hashing related structure/fields, not specific to a sec mech */
130 struct cifs_secmech {
131 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
132 struct crypto_shash *md5; /* md5 hash function */
133 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
134 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
135 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
136 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
139 /* per smb session structure/fields */
140 struct ntlmssp_auth {
141 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
142 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
143 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
144 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
152 struct cifs_sid osid;
153 struct cifs_sid gsid;
154 struct cifs_ntace *ntaces;
155 struct cifs_ace *aces;
159 *****************************************************************
160 * Except the CIFS PDUs themselves all the
161 * globally interesting structs should go here
162 *****************************************************************
166 * A smb_rqst represents a complete request to be issued to a server. It's
167 * formed by a kvec array, followed by an array of pages. Page data is assumed
168 * to start at the beginning of the first page.
171 struct kvec *rq_iov; /* array of kvecs */
172 unsigned int rq_nvec; /* number of kvecs in array */
173 struct page **rq_pages; /* pointer to array of page ptrs */
174 unsigned int rq_npages; /* number pages in array */
175 unsigned int rq_pagesz; /* page size to use */
176 unsigned int rq_tailsz; /* length of last page */
185 struct TCP_Server_Info;
189 struct dfs_info3_param;
193 struct cifs_readdata;
194 struct cifs_writedata;
195 struct cifs_io_parms;
196 struct cifs_search_info;
197 struct cifsInodeInfo;
199 struct smb_version_operations {
200 int (*send_cancel)(struct TCP_Server_Info *, void *,
201 struct mid_q_entry *);
202 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
203 /* setup request: allocate mid, sign message */
204 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
206 /* setup async request: allocate mid, sign message */
207 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
209 /* check response: verify signature, map error */
210 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
212 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
214 void (*set_credits)(struct TCP_Server_Info *, const int);
215 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
216 unsigned int (*get_credits)(struct mid_q_entry *);
217 __u64 (*get_next_mid)(struct TCP_Server_Info *);
218 /* data offset from read response message */
219 unsigned int (*read_data_offset)(char *);
220 /* data length from read response message */
221 unsigned int (*read_data_length)(char *);
222 /* map smb to linux error */
223 int (*map_error)(char *, bool);
224 /* find mid corresponding to the response message */
225 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
226 void (*dump_detail)(void *);
227 void (*clear_stats)(struct cifs_tcon *);
228 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
229 /* verify the message */
230 int (*check_message)(char *, unsigned int);
231 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
232 /* process transaction2 response */
233 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
235 /* check if we need to negotiate */
236 bool (*need_neg)(struct TCP_Server_Info *);
237 /* negotiate to the server */
238 int (*negotiate)(const unsigned int, struct cifs_ses *);
239 /* set negotiated write size */
240 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
241 /* set negotiated read size */
242 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
243 /* setup smb sessionn */
244 int (*sess_setup)(const unsigned int, struct cifs_ses *,
245 const struct nls_table *);
246 /* close smb session */
247 int (*logoff)(const unsigned int, struct cifs_ses *);
248 /* connect to a server share */
249 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
250 struct cifs_tcon *, const struct nls_table *);
251 /* close tree connecion */
252 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
253 /* get DFS referrals */
254 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
255 const char *, struct dfs_info3_param **,
256 unsigned int *, const struct nls_table *, int);
257 /* informational QFS call */
258 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
259 /* check if a path is accessible or not */
260 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
261 struct cifs_sb_info *, const char *);
262 /* query path data from the server */
263 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
264 struct cifs_sb_info *, const char *,
265 FILE_ALL_INFO *, bool *);
266 /* query file data from the server */
267 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
268 struct cifs_fid *, FILE_ALL_INFO *);
269 /* get server index number */
270 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
271 struct cifs_sb_info *, const char *,
272 u64 *uniqueid, FILE_ALL_INFO *);
273 /* set size by path */
274 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
275 const char *, __u64, struct cifs_sb_info *, bool);
276 /* set size by file handle */
277 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
278 struct cifsFileInfo *, __u64, bool);
280 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
282 /* build a full path to the root of the mount */
283 char * (*build_path_to_root)(struct smb_vol *, struct cifs_sb_info *,
285 /* check if we can send an echo or nor */
286 bool (*can_echo)(struct TCP_Server_Info *);
287 /* send echo request */
288 int (*echo)(struct TCP_Server_Info *);
289 /* create directory */
290 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
291 struct cifs_sb_info *);
292 /* set info on created directory */
293 void (*mkdir_setinfo)(struct inode *, const char *,
294 struct cifs_sb_info *, struct cifs_tcon *,
296 /* remove directory */
297 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
298 struct cifs_sb_info *);
300 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
301 struct cifs_sb_info *);
302 /* open, rename and delete file */
303 int (*rename_pending_delete)(const char *, struct dentry *,
305 /* send rename request */
306 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
307 const char *, struct cifs_sb_info *);
308 /* send create hardlink request */
309 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
310 const char *, const char *,
311 struct cifs_sb_info *);
312 /* open a file for non-posix mounts */
313 int (*open)(const unsigned int, struct cifs_tcon *, const char *, int,
314 int, int, struct cifs_fid *, __u32 *, FILE_ALL_INFO *,
315 struct cifs_sb_info *);
316 /* set fid protocol-specific info */
317 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
319 int (*close)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
320 /* send a flush request to the server */
321 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
322 /* async read from the server */
323 int (*async_readv)(struct cifs_readdata *);
324 /* async write to the server */
325 int (*async_writev)(struct cifs_writedata *);
326 /* sync read from the server */
327 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
328 struct cifs_io_parms *, unsigned int *, char **,
330 /* sync write to the server */
331 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
332 struct cifs_io_parms *, unsigned int *, struct kvec *,
334 /* open dir, start readdir */
335 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
336 const char *, struct cifs_sb_info *,
337 struct cifs_fid *, __u16,
338 struct cifs_search_info *);
339 /* continue readdir */
340 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
342 __u16, struct cifs_search_info *srch_inf);
344 int (*close_dir)(const unsigned int, struct cifs_tcon *,
346 /* calculate a size of SMB message */
347 unsigned int (*calc_smb_size)(void *);
348 /* check for STATUS_PENDING and process it in a positive case */
349 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
350 /* send oplock break response */
351 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
352 struct cifsInodeInfo *);
353 /* query remote filesystem */
354 int (*queryfs)(const unsigned int, struct cifs_tcon *,
356 /* send mandatory brlock to the server */
357 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
358 __u64, __u32, int, int, bool);
359 /* unlock range of mandatory locks */
360 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
362 /* push brlocks from the cache to the server */
363 int (*push_mand_locks)(struct cifsFileInfo *);
366 struct smb_version_values {
367 char *version_string;
368 __u32 large_lock_type;
369 __u32 exclusive_lock_type;
370 __u32 shared_lock_type;
371 __u32 unlock_lock_type;
373 size_t max_header_size;
374 size_t read_rsp_size;
376 unsigned int cap_unix;
377 unsigned int cap_nt_find;
378 unsigned int cap_large_files;
381 #define HEADER_SIZE(server) (server->vals->header_size)
382 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
390 char *iocharset; /* local code page for mapping to and from Unicode */
391 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
392 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
408 bool no_psx_acl:1; /* set if posix acl support should be disabled */
410 bool backupuid_specified; /* mount option backupuid is specified */
411 bool backupgid_specified; /* mount option backupgid is specified */
412 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
413 bool server_ino:1; /* use inode numbers from server ie UniqueId */
415 bool strict_io:1; /* strict cache behavior */
416 bool remap:1; /* set to remap seven reserved chars in filenames */
417 bool posix_paths:1; /* unset to not ask for posix pathnames. */
420 bool nullauth:1; /* attempt to authenticate with null user */
421 bool nocase:1; /* request case insensitive filenames */
422 bool nobrl:1; /* disable sending byte range locks to srv */
423 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
424 bool seal:1; /* request transport encryption on share */
425 bool nodfs:1; /* Do not request DFS, even if available */
426 bool local_lease:1; /* check leases only on local system, not remote */
429 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
430 bool fsc:1; /* enable fscache */
431 bool mfsymlinks:1; /* use Minshall+French Symlinks */
433 bool rwpidforward:1; /* pid forward for read/write operations */
436 bool sockopt_tcp_nodelay:1;
437 unsigned short int port;
438 unsigned long actimeo; /* attribute cache timeout (jiffies) */
439 struct smb_version_operations *ops;
440 struct smb_version_values *vals;
442 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
443 struct nls_table *local_nls;
446 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
447 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
448 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
449 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
450 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
451 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
452 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
453 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
454 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
455 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
457 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
458 MS_NODEV | MS_SYNCHRONOUS)
460 struct cifs_mnt_data {
461 struct cifs_sb_info *cifs_sb;
466 static inline unsigned int
467 get_rfc1002_length(void *buf)
469 return be32_to_cpu(*((__be32 *)buf));
473 inc_rfc1001_len(void *buf, int count)
475 be32_add_cpu((__be32 *)buf, count);
478 struct TCP_Server_Info {
479 struct list_head tcp_ses_list;
480 struct list_head smb_ses_list;
481 int srv_count; /* reference counter */
482 /* 15 character server name + 0x20 16th byte indicating type = srv */
483 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
484 struct smb_version_operations *ops;
485 struct smb_version_values *vals;
486 enum statusEnum tcpStatus; /* what we think the status is */
487 char *hostname; /* hostname portion of UNC string */
488 struct socket *ssocket;
489 struct sockaddr_storage dstaddr;
490 struct sockaddr_storage srcaddr; /* locally bind to this IP */
494 wait_queue_head_t response_q;
495 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
496 struct list_head pending_mid_q;
497 bool noblocksnd; /* use blocking sendmsg */
498 bool noautotune; /* do not autotune send buf sizes */
500 int credits; /* send no more requests at once */
501 unsigned int in_flight; /* number of requests on the wire to server */
502 spinlock_t req_lock; /* protect the two values above */
503 struct mutex srv_mutex;
504 struct task_struct *tsk;
505 char server_GUID[16];
507 bool session_estab; /* mark when very first sess is established */
508 #ifdef CONFIG_CIFS_SMB2
509 int echo_credits; /* echo reserved slots */
510 int oplock_credits; /* oplock break reserved slots */
511 bool echoes:1; /* enable echoes */
513 u16 dialect; /* dialect index that server chose */
514 enum securityEnum secType;
515 bool oplocks:1; /* enable oplocks */
516 unsigned int maxReq; /* Clients should submit no more */
517 /* than maxReq distinct unanswered SMBs to the server when using */
518 /* multiplexed reads or writes */
519 unsigned int maxBuf; /* maxBuf specifies the maximum */
520 /* message size the server can send or receive for non-raw SMBs */
521 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
522 /* when socket is setup (and during reconnect) before NegProt sent */
523 unsigned int max_rw; /* maxRw specifies the maximum */
524 /* message size the server can send or receive for */
525 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
526 unsigned int max_vcs; /* maximum number of smb sessions, at least
527 those that can be specified uniquely with
529 unsigned int capabilities; /* selective disabling of caps by smb sess */
530 int timeAdj; /* Adjust for difference in server time zone in sec */
531 __u64 CurrentMid; /* multiplex id - rotating counter */
532 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
533 /* 16th byte of RFC1001 workstation name is always null */
534 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
535 __u32 sequence_number; /* for signing, protected by srv_mutex */
536 struct session_key session_key;
537 unsigned long lstrp; /* when we got last response from this server */
538 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
539 /* extended security flavors that server supports */
540 bool sec_ntlmssp; /* supports NTLMSSP */
541 bool sec_kerberosu2u; /* supports U2U Kerberos */
542 bool sec_kerberos; /* supports plain Kerberos */
543 bool sec_mskerberos; /* supports legacy MS Kerberos */
544 bool large_buf; /* is current buffer large? */
545 struct delayed_work echo; /* echo ping workqueue job */
546 struct kvec *iov; /* reusable kvec array for receives */
547 unsigned int nr_iov; /* number of kvecs in array */
548 char *smallbuf; /* pointer to current "small" buffer */
549 char *bigbuf; /* pointer to current "big" buffer */
550 unsigned int total_read; /* total amount of data read in this pass */
551 #ifdef CONFIG_CIFS_FSCACHE
552 struct fscache_cookie *fscache; /* client index cache cookie */
554 #ifdef CONFIG_CIFS_STATS2
555 atomic_t in_send; /* requests trying to send */
556 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
558 #ifdef CONFIG_CIFS_SMB2
559 unsigned int max_read;
560 unsigned int max_write;
561 #endif /* CONFIG_CIFS_SMB2 */
564 static inline unsigned int
565 in_flight(struct TCP_Server_Info *server)
568 spin_lock(&server->req_lock);
569 num = server->in_flight;
570 spin_unlock(&server->req_lock);
575 has_credits(struct TCP_Server_Info *server, int *credits)
578 spin_lock(&server->req_lock);
580 spin_unlock(&server->req_lock);
585 add_credits(struct TCP_Server_Info *server, const unsigned int add,
588 server->ops->add_credits(server, add, optype);
592 set_credits(struct TCP_Server_Info *server, const int val)
594 server->ops->set_credits(server, val);
598 get_next_mid(struct TCP_Server_Info *server)
600 return server->ops->get_next_mid(server);
604 * When the server supports very large reads and writes via POSIX extensions,
605 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
606 * including the RFC1001 length.
608 * Note that this might make for "interesting" allocation problems during
609 * writeback however as we have to allocate an array of pointers for the
610 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
612 * For reads, there is a similar problem as we need to allocate an array
613 * of kvecs to handle the receive, though that should only need to be done
616 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
617 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
620 * When the server doesn't allow large posix writes, only allow a rsize/wsize
621 * of 2^17-1 minus the size of the call header. That allows for a read or
622 * write up to the maximum size described by RFC1002.
624 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
625 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
628 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
629 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
630 * a single wsize request with a single call.
632 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
635 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
636 * those values when posix extensions aren't in force. In actuality here, we
637 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
638 * to be ok with the extra byte even though Windows doesn't send writes that
643 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
645 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
646 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
649 * Macros to allow the TCP_Server_Info->net field and related code to drop out
650 * when CONFIG_NET_NS isn't set.
655 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
660 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
667 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
672 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
679 * Session structure. One of these for each uid session with a particular host
682 struct list_head smb_ses_list;
683 struct list_head tcon_list;
684 struct mutex session_mutex;
685 struct TCP_Server_Info *server; /* pointer to server info */
686 int ses_count; /* reference counter */
687 enum statusEnum status;
688 unsigned overrideSecFlg; /* if non-zero override global sec flags */
689 __u16 ipc_tid; /* special tid for connection to IPC share */
692 char *serverOS; /* name of operating system underlying server */
693 char *serverNOS; /* name of network operating system of server */
694 char *serverDomain; /* security realm of server */
695 __u64 Suid; /* remote smb uid */
696 uid_t linux_uid; /* overriding owner of files on the mount */
697 uid_t cred_uid; /* owner of credentials */
698 unsigned int capabilities;
699 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
700 TCP names - will ipv6 and sctp addresses fit? */
701 char *user_name; /* must not be null except during init of sess
702 and after mount option parsing we fill it */
705 struct session_key auth_key;
706 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
707 bool need_reconnect:1; /* connection reset, uid now invalid */
708 #ifdef CONFIG_CIFS_SMB2
710 #endif /* CONFIG_CIFS_SMB2 */
712 /* no more than one of the following three session flags may be set */
713 #define CIFS_SES_NT4 1
714 #define CIFS_SES_OS2 2
715 #define CIFS_SES_W9X 4
716 /* following flag is set for old servers such as OS2 (and Win95?)
717 which do not negotiate NTLM or POSIX dialects, but instead
718 negotiate one of the older LANMAN dialects */
719 #define CIFS_SES_LANMAN 8
722 cap_unix(struct cifs_ses *ses)
724 return ses->server->vals->cap_unix & ses->capabilities;
728 * there is one of these for each connection to a resource on a particular
732 struct list_head tcon_list;
734 struct list_head openFileList;
735 struct cifs_ses *ses; /* pointer to session associated with */
736 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
737 char *nativeFileSystem;
738 char *password; /* for share-level security */
739 __u32 tid; /* The 4 byte tree id */
740 __u16 Flags; /* optional support bits */
741 enum statusEnum tidStatus;
742 #ifdef CONFIG_CIFS_STATS
743 atomic_t num_smbs_sent;
748 atomic_t num_flushes;
749 atomic_t num_oplock_brks;
752 atomic_t num_deletes;
754 atomic_t num_posixopens;
755 atomic_t num_posixmkdirs;
757 atomic_t num_renames;
758 atomic_t num_t2renames;
762 atomic_t num_hardlinks;
763 atomic_t num_symlinks;
765 atomic_t num_acl_get;
766 atomic_t num_acl_set;
768 #ifdef CONFIG_CIFS_SMB2
770 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
771 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
773 #endif /* CONFIG_CIFS_SMB2 */
775 #ifdef CONFIG_CIFS_STATS2
776 unsigned long long time_writes;
777 unsigned long long time_reads;
778 unsigned long long time_opens;
779 unsigned long long time_deletes;
780 unsigned long long time_closes;
781 unsigned long long time_mkdirs;
782 unsigned long long time_rmdirs;
783 unsigned long long time_renames;
784 unsigned long long time_t2renames;
785 unsigned long long time_ffirst;
786 unsigned long long time_fnext;
787 unsigned long long time_fclose;
788 #endif /* CONFIG_CIFS_STATS2 */
791 spinlock_t stat_lock;
792 #endif /* CONFIG_CIFS_STATS */
793 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
794 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
795 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
796 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
799 bool seal:1; /* transport encryption for this mounted share */
800 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
801 for this mount even if server would support */
802 bool local_lease:1; /* check leases (only) on local system not remote */
803 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
804 bool need_reconnect:1; /* connection reset, tid now invalid */
805 #ifdef CONFIG_CIFS_SMB2
806 bool print:1; /* set if connection to printer share */
807 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
810 __u32 maximal_access;
811 __u32 vol_serial_number;
812 __le64 vol_create_time;
813 #endif /* CONFIG_CIFS_SMB2 */
814 #ifdef CONFIG_CIFS_FSCACHE
815 u64 resource_id; /* server resource id */
816 struct fscache_cookie *fscache; /* cookie for share */
818 /* BB add field for back pointer to sb struct(s)? */
822 * This is a refcounted and timestamped container for a tcon pointer. The
823 * container holds a tcon reference. It is considered safe to free one of
824 * these when the tl_count goes to 0. The tl_time is the time of the last
825 * "get" on the container.
828 struct rb_node tl_rbnode;
830 unsigned long tl_flags;
831 #define TCON_LINK_MASTER 0
832 #define TCON_LINK_PENDING 1
833 #define TCON_LINK_IN_TREE 2
834 unsigned long tl_time;
836 struct cifs_tcon *tl_tcon;
839 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
841 static inline struct cifs_tcon *
842 tlink_tcon(struct tcon_link *tlink)
844 return tlink->tl_tcon;
847 extern void cifs_put_tlink(struct tcon_link *tlink);
849 static inline struct tcon_link *
850 cifs_get_tlink(struct tcon_link *tlink)
852 if (tlink && !IS_ERR(tlink))
853 atomic_inc(&tlink->tl_count);
857 /* This function is always expected to succeed */
858 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
861 * This info hangs off the cifsFileInfo structure, pointed to by llist.
862 * This is used to track byte stream locks on the file
864 struct cifsLockInfo {
865 struct list_head llist; /* pointer to next cifsLockInfo */
866 struct list_head blist; /* pointer to locks blocked on this */
867 wait_queue_head_t block_q;
875 * One of these for each open instance of a file
877 struct cifs_search_info {
878 loff_t index_of_last_entry;
879 __u16 entries_in_buffer;
882 char *ntwrk_buf_start;
883 char *srch_entries_start;
885 const char *presume_name;
886 unsigned int resume_name_len;
890 bool smallBuf:1; /* so we know which buf_release function to call */
895 #ifdef CONFIG_CIFS_SMB2
896 __u64 persistent_fid; /* persist file id for smb2 */
897 __u64 volatile_fid; /* volatile file id for smb2 */
901 struct cifs_fid_locks {
902 struct list_head llist;
903 struct cifsFileInfo *cfile; /* fid that owns locks */
904 struct list_head locks; /* locks held by fid above */
907 struct cifsFileInfo {
908 struct list_head tlist; /* pointer to next fid owned by tcon */
909 struct list_head flist; /* next fid (file instance) for this inode */
910 struct cifs_fid_locks *llist; /* brlocks held by this fid */
911 unsigned int uid; /* allows finding which FileInfo structure */
912 __u32 pid; /* process id who opened file */
913 struct cifs_fid fid; /* file id from remote */
914 /* BB add lock scope info here if needed */ ;
915 /* lock scope id (0 if none) */
916 struct dentry *dentry;
917 unsigned int f_flags;
918 struct tcon_link *tlink;
919 bool invalidHandle:1; /* file closed via session abend */
920 bool oplock_break_cancelled:1;
921 int count; /* refcount protected by cifs_file_list_lock */
922 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
923 struct cifs_search_info srch_inf;
924 struct work_struct oplock_break; /* work for oplock breaks */
927 struct cifs_io_parms {
929 #ifdef CONFIG_CIFS_SMB2
930 __u64 persistent_fid; /* persist file id for smb2 */
931 __u64 volatile_fid; /* volatile file id for smb2 */
936 struct cifs_tcon *tcon;
939 struct cifs_readdata;
941 /* asynchronous read support */
942 struct cifs_readdata {
943 struct kref refcount;
944 struct list_head list;
945 struct completion done;
946 struct cifsFileInfo *cfile;
947 struct address_space *mapping;
952 struct work_struct work;
953 int (*read_into_pages)(struct TCP_Server_Info *server,
954 struct cifs_readdata *rdata,
959 unsigned int nr_pages;
960 struct page *pages[];
963 struct cifs_writedata;
965 /* asynchronous write support */
966 struct cifs_writedata {
967 struct kref refcount;
968 struct list_head list;
969 struct completion done;
970 enum writeback_sync_modes sync_mode;
971 struct work_struct work;
972 struct cifsFileInfo *cfile;
979 unsigned int nr_pages;
980 struct page *pages[1];
984 * Take a reference on the file private data. Must be called with
985 * cifs_file_list_lock held.
988 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
993 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
994 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
997 * One of these for each file inode
1000 struct cifsInodeInfo {
1001 bool can_cache_brlcks;
1002 struct list_head llist; /* locks helb by this inode */
1003 struct mutex lock_mutex; /* protect the fields above */
1004 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1005 struct list_head openFileList;
1006 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1007 bool clientCanCacheRead; /* read oplock */
1008 bool clientCanCacheAll; /* read and writebehind oplock */
1009 bool delete_pending; /* DELETE_ON_CLOSE is set */
1010 bool invalid_mapping; /* pagecache is invalid */
1011 unsigned long time; /* jiffies of last update of inode */
1012 u64 server_eof; /* current file size on server -- protected by i_lock */
1013 u64 uniqueid; /* server inode number */
1014 u64 createtime; /* creation time on server */
1015 #ifdef CONFIG_CIFS_FSCACHE
1016 struct fscache_cookie *fscache;
1018 struct inode vfs_inode;
1021 static inline struct cifsInodeInfo *
1022 CIFS_I(struct inode *inode)
1024 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1027 static inline struct cifs_sb_info *
1028 CIFS_SB(struct super_block *sb)
1030 return sb->s_fs_info;
1033 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1035 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1042 convert_delimiter(char *path, char delim)
1055 for (i = 0; path[i] != '\0'; i++) {
1056 if (path[i] == old_delim)
1061 static inline char *
1062 build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
1063 struct cifs_tcon *tcon)
1065 if (!vol->ops->build_path_to_root)
1067 return vol->ops->build_path_to_root(vol, cifs_sb, tcon);
1070 #ifdef CONFIG_CIFS_STATS
1071 #define cifs_stats_inc atomic_inc
1073 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1077 spin_lock(&tcon->stat_lock);
1078 tcon->bytes_written += bytes;
1079 spin_unlock(&tcon->stat_lock);
1083 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1086 spin_lock(&tcon->stat_lock);
1087 tcon->bytes_read += bytes;
1088 spin_unlock(&tcon->stat_lock);
1092 #define cifs_stats_inc(field) do {} while (0)
1093 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1094 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1100 * This is the prototype for the mid receive function. This function is for
1101 * receiving the rest of the SMB frame, starting with the WordCount (which is
1102 * just after the MID in struct smb_hdr). Note:
1104 * - This will be called by cifsd, with no locks held.
1105 * - The mid will still be on the pending_mid_q.
1106 * - mid->resp_buf will point to the current buffer.
1108 * Returns zero on a successful receive, or an error. The receive state in
1109 * the TCP_Server_Info will also be updated.
1111 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1112 struct mid_q_entry *mid);
1115 * This is the prototype for the mid callback function. This is called once the
1116 * mid has been received off of the socket. When creating one, take special
1117 * care to avoid deadlocks. Things to bear in mind:
1119 * - it will be called by cifsd, with no locks held
1120 * - the mid will be removed from any lists
1122 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1124 /* one of these for every pending CIFS request to the server */
1125 struct mid_q_entry {
1126 struct list_head qhead; /* mids waiting on reply from this server */
1127 struct TCP_Server_Info *server; /* server corresponding to this mid */
1128 __u64 mid; /* multiplex id */
1129 __u32 pid; /* process id */
1130 __u32 sequence_number; /* for CIFS signing */
1131 unsigned long when_alloc; /* when mid was created */
1132 #ifdef CONFIG_CIFS_STATS2
1133 unsigned long when_sent; /* time when smb send finished */
1134 unsigned long when_received; /* when demux complete (taken off wire) */
1136 mid_receive_t *receive; /* call receive callback */
1137 mid_callback_t *callback; /* call completion callback */
1138 void *callback_data; /* general purpose pointer for callback */
1139 void *resp_buf; /* pointer to received SMB header */
1140 int mid_state; /* wish this were enum but can not pass to wait_event */
1141 __le16 command; /* smb command code */
1142 bool large_buf:1; /* if valid response, is pointer to large buf */
1143 bool multiRsp:1; /* multiple trans2 responses for one request */
1144 bool multiEnd:1; /* both received */
1147 /* Make code in transport.c a little cleaner by moving
1148 update of optional stats into function below */
1149 #ifdef CONFIG_CIFS_STATS2
1151 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1153 atomic_inc(&server->in_send);
1156 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1158 atomic_dec(&server->in_send);
1161 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1163 atomic_inc(&server->num_waiters);
1166 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1168 atomic_dec(&server->num_waiters);
1171 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1173 mid->when_sent = jiffies;
1176 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1179 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1183 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1187 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1191 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1196 /* for pending dnotify requests */
1197 struct dir_notify_req {
1198 struct list_head lhead;
1205 __u32 filter; /* CompletionFilter (for multishot) */
1210 struct dfs_info3_param {
1211 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1220 * common struct for holding inode info when searching for or updating an
1221 * inode with new info
1224 #define CIFS_FATTR_DFS_REFERRAL 0x1
1225 #define CIFS_FATTR_DELETE_PENDING 0x2
1226 #define CIFS_FATTR_NEED_REVAL 0x4
1227 #define CIFS_FATTR_INO_COLLISION 0x8
1240 unsigned int cf_nlink;
1241 unsigned int cf_dtype;
1242 struct timespec cf_atime;
1243 struct timespec cf_mtime;
1244 struct timespec cf_ctime;
1247 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1250 kfree(param->path_name);
1251 kfree(param->node_name);
1256 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1257 int number_of_items)
1260 if ((number_of_items == 0) || (param == NULL))
1262 for (i = 0; i < number_of_items; i++) {
1263 kfree(param[i].path_name);
1264 kfree(param[i].node_name);
1270 #define MID_REQUEST_ALLOCATED 1
1271 #define MID_REQUEST_SUBMITTED 2
1272 #define MID_RESPONSE_RECEIVED 4
1273 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1274 #define MID_RESPONSE_MALFORMED 0x10
1275 #define MID_SHUTDOWN 0x20
1277 /* Types of response buffer returned from SendReceive2 */
1278 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1279 #define CIFS_SMALL_BUFFER 1
1280 #define CIFS_LARGE_BUFFER 2
1281 #define CIFS_IOVEC 4 /* array of response buffers */
1283 /* Type of Request to SendReceive2 */
1284 #define CIFS_BLOCKING_OP 1 /* operation can block */
1285 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1286 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1287 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1288 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1289 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1291 /* Type of request operation */
1292 #define CIFS_ECHO_OP 0x080 /* echo request */
1293 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1294 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1295 #define CIFS_OP_MASK 0x0380 /* mask request type */
1297 /* Security Flags: indicate type of session setup needed */
1298 #define CIFSSEC_MAY_SIGN 0x00001
1299 #define CIFSSEC_MAY_NTLM 0x00002
1300 #define CIFSSEC_MAY_NTLMV2 0x00004
1301 #define CIFSSEC_MAY_KRB5 0x00008
1302 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1303 #define CIFSSEC_MAY_LANMAN 0x00010
1304 #define CIFSSEC_MAY_PLNTXT 0x00020
1306 #define CIFSSEC_MAY_LANMAN 0
1307 #define CIFSSEC_MAY_PLNTXT 0
1308 #endif /* weak passwords */
1309 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1310 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1312 #define CIFSSEC_MUST_SIGN 0x01001
1313 /* note that only one of the following can be set so the
1314 result of setting MUST flags more than once will be to
1315 require use of the stronger protocol */
1316 #define CIFSSEC_MUST_NTLM 0x02002
1317 #define CIFSSEC_MUST_NTLMV2 0x04004
1318 #define CIFSSEC_MUST_KRB5 0x08008
1319 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1320 #define CIFSSEC_MUST_LANMAN 0x10010
1321 #define CIFSSEC_MUST_PLNTXT 0x20020
1322 #ifdef CONFIG_CIFS_UPCALL
1323 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1325 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1327 #else /* do not allow weak pw hash */
1328 #define CIFSSEC_MUST_LANMAN 0
1329 #define CIFSSEC_MUST_PLNTXT 0
1330 #ifdef CONFIG_CIFS_UPCALL
1331 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1333 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1335 #endif /* WEAK_PW_HASH */
1336 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1337 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1339 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1340 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1341 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1343 *****************************************************************
1344 * All constants go here
1345 *****************************************************************
1348 #define UID_HASH (16)
1351 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1352 * following to be declared.
1355 /****************************************************************************
1356 * Locking notes. All updates to global variables and lists should be
1357 * protected by spinlocks or semaphores.
1361 * GlobalMid_Lock protects:
1362 * list operations on pending_mid_q and oplockQ
1363 * updates to XID counters, multiplex id and SMB sequence numbers
1364 * cifs_file_list_lock protects:
1365 * list operations on tcp and SMB session lists and tCon lists
1366 * f_owner.lock protects certain per file struct operations
1367 * mapping->page_lock protects certain per page operations
1371 * sesSem operations on smb session
1372 * tconSem operations on tree connection
1373 * fh_sem file handle reconnection operations
1375 ****************************************************************************/
1377 #ifdef DECLARE_GLOBALS_HERE
1378 #define GLOBAL_EXTERN
1380 #define GLOBAL_EXTERN extern
1384 * the list of TCP_Server_Info structures, ie each of the sockets
1385 * connecting our client to a distinct server (ip address), is
1386 * chained together by cifs_tcp_ses_list. The list of all our SMB
1387 * sessions (and from that the tree connections) can be found
1388 * by iterating over cifs_tcp_ses_list
1390 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1393 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1394 * tcp session, and the list of tcon's per smb session. It also protects
1395 * the reference counters for the server, smb session, and tcon. Finally,
1396 * changes to the tcon->tidStatus should be done while holding this lock.
1398 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1401 * This lock protects the cifs_file->llist and cifs_file->flist
1402 * list operations, and updates to some flags (cifs_file->invalidHandle)
1403 * It will be moved to either use the tcon->stat_lock or equivalent later.
1404 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1405 * the cifs_tcp_ses_lock must be grabbed first and released last.
1407 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1409 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1410 /* Outstanding dir notify requests */
1411 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1412 /* DirNotify response queue */
1413 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1414 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1417 * Global transaction id (XID) information
1419 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1420 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1421 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1422 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1423 /* on midQ entries */
1425 * Global counters, updated atomically
1427 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1428 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1429 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1430 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1431 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1433 /* Various Debug counters */
1434 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1435 #ifdef CONFIG_CIFS_STATS2
1436 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1437 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1439 GLOBAL_EXTERN atomic_t smBufAllocCount;
1440 GLOBAL_EXTERN atomic_t midCount;
1443 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1444 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1445 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1446 with more secure ntlmssp2 challenge/resp */
1447 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1448 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1449 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1450 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1451 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1452 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1454 #ifdef CONFIG_CIFS_ACL
1455 GLOBAL_EXTERN struct rb_root uidtree;
1456 GLOBAL_EXTERN struct rb_root gidtree;
1457 GLOBAL_EXTERN spinlock_t siduidlock;
1458 GLOBAL_EXTERN spinlock_t sidgidlock;
1459 GLOBAL_EXTERN struct rb_root siduidtree;
1460 GLOBAL_EXTERN struct rb_root sidgidtree;
1461 GLOBAL_EXTERN spinlock_t uidsidlock;
1462 GLOBAL_EXTERN spinlock_t gidsidlock;
1463 #endif /* CONFIG_CIFS_ACL */
1465 void cifs_oplock_break(struct work_struct *work);
1467 extern const struct slow_work_ops cifs_oplock_break_ops;
1468 extern struct workqueue_struct *cifsiod_wq;
1470 extern mempool_t *cifs_mid_poolp;
1472 /* Operations for different SMB versions */
1473 #define SMB1_VERSION_STRING "1.0"
1474 extern struct smb_version_operations smb1_operations;
1475 extern struct smb_version_values smb1_values;
1476 #define SMB21_VERSION_STRING "2.1"
1477 extern struct smb_version_operations smb21_operations;
1478 extern struct smb_version_values smb21_values;
1479 #endif /* _CIFS_GLOB_H */