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 void (*close)(const unsigned int, struct cifs_tcon *,
321 /* send a flush request to the server */
322 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
323 /* async read from the server */
324 int (*async_readv)(struct cifs_readdata *);
325 /* async write to the server */
326 int (*async_writev)(struct cifs_writedata *);
327 /* sync read from the server */
328 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
329 struct cifs_io_parms *, unsigned int *, char **,
331 /* sync write to the server */
332 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
333 struct cifs_io_parms *, unsigned int *, struct kvec *,
335 /* open dir, start readdir */
336 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
337 const char *, struct cifs_sb_info *,
338 struct cifs_fid *, __u16,
339 struct cifs_search_info *);
340 /* continue readdir */
341 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
343 __u16, struct cifs_search_info *srch_inf);
345 int (*close_dir)(const unsigned int, struct cifs_tcon *,
347 /* calculate a size of SMB message */
348 unsigned int (*calc_smb_size)(void *);
349 /* check for STATUS_PENDING and process it in a positive case */
350 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
351 /* send oplock break response */
352 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
353 struct cifsInodeInfo *);
354 /* query remote filesystem */
355 int (*queryfs)(const unsigned int, struct cifs_tcon *,
357 /* send mandatory brlock to the server */
358 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
359 __u64, __u32, int, int, bool);
360 /* unlock range of mandatory locks */
361 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
363 /* push brlocks from the cache to the server */
364 int (*push_mand_locks)(struct cifsFileInfo *);
365 /* get lease key of the inode */
366 void (*get_lease_key)(struct inode *, struct cifs_fid *fid);
367 /* set lease key of the inode */
368 void (*set_lease_key)(struct inode *, struct cifs_fid *fid);
369 /* generate new lease key */
370 void (*new_lease_key)(struct cifs_fid *fid);
373 struct smb_version_values {
374 char *version_string;
375 __u32 large_lock_type;
376 __u32 exclusive_lock_type;
377 __u32 shared_lock_type;
378 __u32 unlock_lock_type;
380 size_t max_header_size;
381 size_t read_rsp_size;
383 unsigned int cap_unix;
384 unsigned int cap_nt_find;
385 unsigned int cap_large_files;
388 #define HEADER_SIZE(server) (server->vals->header_size)
389 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
397 char *iocharset; /* local code page for mapping to and from Unicode */
398 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
399 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
415 bool no_psx_acl:1; /* set if posix acl support should be disabled */
417 bool backupuid_specified; /* mount option backupuid is specified */
418 bool backupgid_specified; /* mount option backupgid is specified */
419 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
420 bool server_ino:1; /* use inode numbers from server ie UniqueId */
422 bool strict_io:1; /* strict cache behavior */
423 bool remap:1; /* set to remap seven reserved chars in filenames */
424 bool posix_paths:1; /* unset to not ask for posix pathnames. */
427 bool nullauth:1; /* attempt to authenticate with null user */
428 bool nocase:1; /* request case insensitive filenames */
429 bool nobrl:1; /* disable sending byte range locks to srv */
430 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
431 bool seal:1; /* request transport encryption on share */
432 bool nodfs:1; /* Do not request DFS, even if available */
433 bool local_lease:1; /* check leases only on local system, not remote */
436 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
437 bool fsc:1; /* enable fscache */
438 bool mfsymlinks:1; /* use Minshall+French Symlinks */
440 bool rwpidforward:1; /* pid forward for read/write operations */
443 bool sockopt_tcp_nodelay:1;
444 unsigned short int port;
445 unsigned long actimeo; /* attribute cache timeout (jiffies) */
446 struct smb_version_operations *ops;
447 struct smb_version_values *vals;
449 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
450 struct nls_table *local_nls;
453 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
454 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
455 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
456 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
457 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
458 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
459 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
460 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
461 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
462 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
464 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
465 MS_NODEV | MS_SYNCHRONOUS)
467 struct cifs_mnt_data {
468 struct cifs_sb_info *cifs_sb;
473 static inline unsigned int
474 get_rfc1002_length(void *buf)
476 return be32_to_cpu(*((__be32 *)buf));
480 inc_rfc1001_len(void *buf, int count)
482 be32_add_cpu((__be32 *)buf, count);
485 struct TCP_Server_Info {
486 struct list_head tcp_ses_list;
487 struct list_head smb_ses_list;
488 int srv_count; /* reference counter */
489 /* 15 character server name + 0x20 16th byte indicating type = srv */
490 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
491 struct smb_version_operations *ops;
492 struct smb_version_values *vals;
493 enum statusEnum tcpStatus; /* what we think the status is */
494 char *hostname; /* hostname portion of UNC string */
495 struct socket *ssocket;
496 struct sockaddr_storage dstaddr;
497 struct sockaddr_storage srcaddr; /* locally bind to this IP */
501 wait_queue_head_t response_q;
502 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
503 struct list_head pending_mid_q;
504 bool noblocksnd; /* use blocking sendmsg */
505 bool noautotune; /* do not autotune send buf sizes */
507 int credits; /* send no more requests at once */
508 unsigned int in_flight; /* number of requests on the wire to server */
509 spinlock_t req_lock; /* protect the two values above */
510 struct mutex srv_mutex;
511 struct task_struct *tsk;
512 char server_GUID[16];
514 bool session_estab; /* mark when very first sess is established */
515 #ifdef CONFIG_CIFS_SMB2
516 int echo_credits; /* echo reserved slots */
517 int oplock_credits; /* oplock break reserved slots */
518 bool echoes:1; /* enable echoes */
520 u16 dialect; /* dialect index that server chose */
521 enum securityEnum secType;
522 bool oplocks:1; /* enable oplocks */
523 unsigned int maxReq; /* Clients should submit no more */
524 /* than maxReq distinct unanswered SMBs to the server when using */
525 /* multiplexed reads or writes */
526 unsigned int maxBuf; /* maxBuf specifies the maximum */
527 /* message size the server can send or receive for non-raw SMBs */
528 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
529 /* when socket is setup (and during reconnect) before NegProt sent */
530 unsigned int max_rw; /* maxRw specifies the maximum */
531 /* message size the server can send or receive for */
532 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
533 unsigned int max_vcs; /* maximum number of smb sessions, at least
534 those that can be specified uniquely with
536 unsigned int capabilities; /* selective disabling of caps by smb sess */
537 int timeAdj; /* Adjust for difference in server time zone in sec */
538 __u64 CurrentMid; /* multiplex id - rotating counter */
539 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
540 /* 16th byte of RFC1001 workstation name is always null */
541 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
542 __u32 sequence_number; /* for signing, protected by srv_mutex */
543 struct session_key session_key;
544 unsigned long lstrp; /* when we got last response from this server */
545 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
546 /* extended security flavors that server supports */
547 bool sec_ntlmssp; /* supports NTLMSSP */
548 bool sec_kerberosu2u; /* supports U2U Kerberos */
549 bool sec_kerberos; /* supports plain Kerberos */
550 bool sec_mskerberos; /* supports legacy MS Kerberos */
551 bool large_buf; /* is current buffer large? */
552 struct delayed_work echo; /* echo ping workqueue job */
553 struct kvec *iov; /* reusable kvec array for receives */
554 unsigned int nr_iov; /* number of kvecs in array */
555 char *smallbuf; /* pointer to current "small" buffer */
556 char *bigbuf; /* pointer to current "big" buffer */
557 unsigned int total_read; /* total amount of data read in this pass */
558 #ifdef CONFIG_CIFS_FSCACHE
559 struct fscache_cookie *fscache; /* client index cache cookie */
561 #ifdef CONFIG_CIFS_STATS2
562 atomic_t in_send; /* requests trying to send */
563 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
565 #ifdef CONFIG_CIFS_SMB2
566 unsigned int max_read;
567 unsigned int max_write;
568 #endif /* CONFIG_CIFS_SMB2 */
571 static inline unsigned int
572 in_flight(struct TCP_Server_Info *server)
575 spin_lock(&server->req_lock);
576 num = server->in_flight;
577 spin_unlock(&server->req_lock);
582 has_credits(struct TCP_Server_Info *server, int *credits)
585 spin_lock(&server->req_lock);
587 spin_unlock(&server->req_lock);
592 add_credits(struct TCP_Server_Info *server, const unsigned int add,
595 server->ops->add_credits(server, add, optype);
599 set_credits(struct TCP_Server_Info *server, const int val)
601 server->ops->set_credits(server, val);
605 get_next_mid(struct TCP_Server_Info *server)
607 return server->ops->get_next_mid(server);
611 * When the server supports very large reads and writes via POSIX extensions,
612 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
613 * including the RFC1001 length.
615 * Note that this might make for "interesting" allocation problems during
616 * writeback however as we have to allocate an array of pointers for the
617 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
619 * For reads, there is a similar problem as we need to allocate an array
620 * of kvecs to handle the receive, though that should only need to be done
623 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
624 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
627 * When the server doesn't allow large posix writes, only allow a rsize/wsize
628 * of 2^17-1 minus the size of the call header. That allows for a read or
629 * write up to the maximum size described by RFC1002.
631 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
632 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
635 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
636 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
637 * a single wsize request with a single call.
639 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
642 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
643 * those values when posix extensions aren't in force. In actuality here, we
644 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
645 * to be ok with the extra byte even though Windows doesn't send writes that
650 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
652 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
653 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
656 * Macros to allow the TCP_Server_Info->net field and related code to drop out
657 * when CONFIG_NET_NS isn't set.
662 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
667 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
674 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
679 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
686 * Session structure. One of these for each uid session with a particular host
689 struct list_head smb_ses_list;
690 struct list_head tcon_list;
691 struct mutex session_mutex;
692 struct TCP_Server_Info *server; /* pointer to server info */
693 int ses_count; /* reference counter */
694 enum statusEnum status;
695 unsigned overrideSecFlg; /* if non-zero override global sec flags */
696 __u16 ipc_tid; /* special tid for connection to IPC share */
699 char *serverOS; /* name of operating system underlying server */
700 char *serverNOS; /* name of network operating system of server */
701 char *serverDomain; /* security realm of server */
702 __u64 Suid; /* remote smb uid */
703 uid_t linux_uid; /* overriding owner of files on the mount */
704 uid_t cred_uid; /* owner of credentials */
705 unsigned int capabilities;
706 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
707 TCP names - will ipv6 and sctp addresses fit? */
708 char *user_name; /* must not be null except during init of sess
709 and after mount option parsing we fill it */
712 struct session_key auth_key;
713 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
714 bool need_reconnect:1; /* connection reset, uid now invalid */
715 #ifdef CONFIG_CIFS_SMB2
717 #endif /* CONFIG_CIFS_SMB2 */
720 /* no more than one of the following three session flags may be set */
721 #define CIFS_SES_NT4 1
722 #define CIFS_SES_OS2 2
723 #define CIFS_SES_W9X 4
724 /* following flag is set for old servers such as OS2 (and Win95?)
725 which do not negotiate NTLM or POSIX dialects, but instead
726 negotiate one of the older LANMAN dialects */
727 #define CIFS_SES_LANMAN 8
730 cap_unix(struct cifs_ses *ses)
732 return ses->server->vals->cap_unix & ses->capabilities;
736 * there is one of these for each connection to a resource on a particular
740 struct list_head tcon_list;
742 struct list_head openFileList;
743 struct cifs_ses *ses; /* pointer to session associated with */
744 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
745 char *nativeFileSystem;
746 char *password; /* for share-level security */
747 __u32 tid; /* The 4 byte tree id */
748 __u16 Flags; /* optional support bits */
749 enum statusEnum tidStatus;
750 #ifdef CONFIG_CIFS_STATS
751 atomic_t num_smbs_sent;
756 atomic_t num_flushes;
757 atomic_t num_oplock_brks;
760 atomic_t num_deletes;
762 atomic_t num_posixopens;
763 atomic_t num_posixmkdirs;
765 atomic_t num_renames;
766 atomic_t num_t2renames;
770 atomic_t num_hardlinks;
771 atomic_t num_symlinks;
773 atomic_t num_acl_get;
774 atomic_t num_acl_set;
776 #ifdef CONFIG_CIFS_SMB2
778 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
779 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
781 #endif /* CONFIG_CIFS_SMB2 */
783 #ifdef CONFIG_CIFS_STATS2
784 unsigned long long time_writes;
785 unsigned long long time_reads;
786 unsigned long long time_opens;
787 unsigned long long time_deletes;
788 unsigned long long time_closes;
789 unsigned long long time_mkdirs;
790 unsigned long long time_rmdirs;
791 unsigned long long time_renames;
792 unsigned long long time_t2renames;
793 unsigned long long time_ffirst;
794 unsigned long long time_fnext;
795 unsigned long long time_fclose;
796 #endif /* CONFIG_CIFS_STATS2 */
799 spinlock_t stat_lock;
800 #endif /* CONFIG_CIFS_STATS */
801 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
802 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
803 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
804 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
807 bool seal:1; /* transport encryption for this mounted share */
808 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
809 for this mount even if server would support */
810 bool local_lease:1; /* check leases (only) on local system not remote */
811 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
812 bool need_reconnect:1; /* connection reset, tid now invalid */
813 #ifdef CONFIG_CIFS_SMB2
814 bool print:1; /* set if connection to printer share */
815 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
818 __u32 maximal_access;
819 __u32 vol_serial_number;
820 __le64 vol_create_time;
821 #endif /* CONFIG_CIFS_SMB2 */
822 #ifdef CONFIG_CIFS_FSCACHE
823 u64 resource_id; /* server resource id */
824 struct fscache_cookie *fscache; /* cookie for share */
826 struct list_head pending_opens; /* list of incomplete opens */
827 /* BB add field for back pointer to sb struct(s)? */
831 * This is a refcounted and timestamped container for a tcon pointer. The
832 * container holds a tcon reference. It is considered safe to free one of
833 * these when the tl_count goes to 0. The tl_time is the time of the last
834 * "get" on the container.
837 struct rb_node tl_rbnode;
839 unsigned long tl_flags;
840 #define TCON_LINK_MASTER 0
841 #define TCON_LINK_PENDING 1
842 #define TCON_LINK_IN_TREE 2
843 unsigned long tl_time;
845 struct cifs_tcon *tl_tcon;
848 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
850 static inline struct cifs_tcon *
851 tlink_tcon(struct tcon_link *tlink)
853 return tlink->tl_tcon;
856 extern void cifs_put_tlink(struct tcon_link *tlink);
858 static inline struct tcon_link *
859 cifs_get_tlink(struct tcon_link *tlink)
861 if (tlink && !IS_ERR(tlink))
862 atomic_inc(&tlink->tl_count);
866 /* This function is always expected to succeed */
867 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
869 #define CIFS_OPLOCK_NO_CHANGE 0xfe
871 struct cifs_pending_open {
872 struct list_head olist;
873 struct tcon_link *tlink;
879 * This info hangs off the cifsFileInfo structure, pointed to by llist.
880 * This is used to track byte stream locks on the file
882 struct cifsLockInfo {
883 struct list_head llist; /* pointer to next cifsLockInfo */
884 struct list_head blist; /* pointer to locks blocked on this */
885 wait_queue_head_t block_q;
893 * One of these for each open instance of a file
895 struct cifs_search_info {
896 loff_t index_of_last_entry;
897 __u16 entries_in_buffer;
900 char *ntwrk_buf_start;
901 char *srch_entries_start;
903 const char *presume_name;
904 unsigned int resume_name_len;
908 bool smallBuf:1; /* so we know which buf_release function to call */
913 #ifdef CONFIG_CIFS_SMB2
914 __u64 persistent_fid; /* persist file id for smb2 */
915 __u64 volatile_fid; /* volatile file id for smb2 */
916 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
918 struct cifs_pending_open *pending_open;
921 struct cifs_fid_locks {
922 struct list_head llist;
923 struct cifsFileInfo *cfile; /* fid that owns locks */
924 struct list_head locks; /* locks held by fid above */
927 struct cifsFileInfo {
928 struct list_head tlist; /* pointer to next fid owned by tcon */
929 struct list_head flist; /* next fid (file instance) for this inode */
930 struct cifs_fid_locks *llist; /* brlocks held by this fid */
931 unsigned int uid; /* allows finding which FileInfo structure */
932 __u32 pid; /* process id who opened file */
933 struct cifs_fid fid; /* file id from remote */
934 /* BB add lock scope info here if needed */ ;
935 /* lock scope id (0 if none) */
936 struct dentry *dentry;
937 unsigned int f_flags;
938 struct tcon_link *tlink;
939 bool invalidHandle:1; /* file closed via session abend */
940 bool oplock_break_cancelled:1;
941 int count; /* refcount protected by cifs_file_list_lock */
942 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
943 struct cifs_search_info srch_inf;
944 struct work_struct oplock_break; /* work for oplock breaks */
947 struct cifs_io_parms {
949 #ifdef CONFIG_CIFS_SMB2
950 __u64 persistent_fid; /* persist file id for smb2 */
951 __u64 volatile_fid; /* volatile file id for smb2 */
956 struct cifs_tcon *tcon;
959 struct cifs_readdata;
961 /* asynchronous read support */
962 struct cifs_readdata {
963 struct kref refcount;
964 struct list_head list;
965 struct completion done;
966 struct cifsFileInfo *cfile;
967 struct address_space *mapping;
972 struct work_struct work;
973 int (*read_into_pages)(struct TCP_Server_Info *server,
974 struct cifs_readdata *rdata,
979 unsigned int nr_pages;
980 struct page *pages[];
983 struct cifs_writedata;
985 /* asynchronous write support */
986 struct cifs_writedata {
987 struct kref refcount;
988 struct list_head list;
989 struct completion done;
990 enum writeback_sync_modes sync_mode;
991 struct work_struct work;
992 struct cifsFileInfo *cfile;
999 unsigned int nr_pages;
1000 struct page *pages[1];
1004 * Take a reference on the file private data. Must be called with
1005 * cifs_file_list_lock held.
1008 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1013 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1014 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1017 * One of these for each file inode
1020 struct cifsInodeInfo {
1021 bool can_cache_brlcks;
1022 struct list_head llist; /* locks helb by this inode */
1023 struct rw_semaphore lock_sem; /* protect the fields above */
1024 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1025 struct list_head openFileList;
1026 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1027 bool clientCanCacheRead; /* read oplock */
1028 bool clientCanCacheAll; /* read and writebehind oplock */
1029 bool delete_pending; /* DELETE_ON_CLOSE is set */
1030 bool invalid_mapping; /* pagecache is invalid */
1031 unsigned long time; /* jiffies of last update of inode */
1032 u64 server_eof; /* current file size on server -- protected by i_lock */
1033 u64 uniqueid; /* server inode number */
1034 u64 createtime; /* creation time on server */
1035 #ifdef CONFIG_CIFS_SMB2
1036 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1038 #ifdef CONFIG_CIFS_FSCACHE
1039 struct fscache_cookie *fscache;
1041 struct inode vfs_inode;
1044 static inline struct cifsInodeInfo *
1045 CIFS_I(struct inode *inode)
1047 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1050 static inline struct cifs_sb_info *
1051 CIFS_SB(struct super_block *sb)
1053 return sb->s_fs_info;
1056 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1058 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1065 convert_delimiter(char *path, char delim)
1078 for (i = 0; path[i] != '\0'; i++) {
1079 if (path[i] == old_delim)
1084 static inline char *
1085 build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
1086 struct cifs_tcon *tcon)
1088 if (!vol->ops->build_path_to_root)
1090 return vol->ops->build_path_to_root(vol, cifs_sb, tcon);
1093 #ifdef CONFIG_CIFS_STATS
1094 #define cifs_stats_inc atomic_inc
1096 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1100 spin_lock(&tcon->stat_lock);
1101 tcon->bytes_written += bytes;
1102 spin_unlock(&tcon->stat_lock);
1106 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1109 spin_lock(&tcon->stat_lock);
1110 tcon->bytes_read += bytes;
1111 spin_unlock(&tcon->stat_lock);
1115 #define cifs_stats_inc(field) do {} while (0)
1116 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1117 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1123 * This is the prototype for the mid receive function. This function is for
1124 * receiving the rest of the SMB frame, starting with the WordCount (which is
1125 * just after the MID in struct smb_hdr). Note:
1127 * - This will be called by cifsd, with no locks held.
1128 * - The mid will still be on the pending_mid_q.
1129 * - mid->resp_buf will point to the current buffer.
1131 * Returns zero on a successful receive, or an error. The receive state in
1132 * the TCP_Server_Info will also be updated.
1134 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1135 struct mid_q_entry *mid);
1138 * This is the prototype for the mid callback function. This is called once the
1139 * mid has been received off of the socket. When creating one, take special
1140 * care to avoid deadlocks. Things to bear in mind:
1142 * - it will be called by cifsd, with no locks held
1143 * - the mid will be removed from any lists
1145 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1147 /* one of these for every pending CIFS request to the server */
1148 struct mid_q_entry {
1149 struct list_head qhead; /* mids waiting on reply from this server */
1150 struct TCP_Server_Info *server; /* server corresponding to this mid */
1151 __u64 mid; /* multiplex id */
1152 __u32 pid; /* process id */
1153 __u32 sequence_number; /* for CIFS signing */
1154 unsigned long when_alloc; /* when mid was created */
1155 #ifdef CONFIG_CIFS_STATS2
1156 unsigned long when_sent; /* time when smb send finished */
1157 unsigned long when_received; /* when demux complete (taken off wire) */
1159 mid_receive_t *receive; /* call receive callback */
1160 mid_callback_t *callback; /* call completion callback */
1161 void *callback_data; /* general purpose pointer for callback */
1162 void *resp_buf; /* pointer to received SMB header */
1163 int mid_state; /* wish this were enum but can not pass to wait_event */
1164 __le16 command; /* smb command code */
1165 bool large_buf:1; /* if valid response, is pointer to large buf */
1166 bool multiRsp:1; /* multiple trans2 responses for one request */
1167 bool multiEnd:1; /* both received */
1170 /* Make code in transport.c a little cleaner by moving
1171 update of optional stats into function below */
1172 #ifdef CONFIG_CIFS_STATS2
1174 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1176 atomic_inc(&server->in_send);
1179 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1181 atomic_dec(&server->in_send);
1184 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1186 atomic_inc(&server->num_waiters);
1189 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1191 atomic_dec(&server->num_waiters);
1194 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1196 mid->when_sent = jiffies;
1199 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1202 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1206 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1210 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1214 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1219 /* for pending dnotify requests */
1220 struct dir_notify_req {
1221 struct list_head lhead;
1228 __u32 filter; /* CompletionFilter (for multishot) */
1233 struct dfs_info3_param {
1234 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1243 * common struct for holding inode info when searching for or updating an
1244 * inode with new info
1247 #define CIFS_FATTR_DFS_REFERRAL 0x1
1248 #define CIFS_FATTR_DELETE_PENDING 0x2
1249 #define CIFS_FATTR_NEED_REVAL 0x4
1250 #define CIFS_FATTR_INO_COLLISION 0x8
1263 unsigned int cf_nlink;
1264 unsigned int cf_dtype;
1265 struct timespec cf_atime;
1266 struct timespec cf_mtime;
1267 struct timespec cf_ctime;
1270 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1273 kfree(param->path_name);
1274 kfree(param->node_name);
1279 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1280 int number_of_items)
1283 if ((number_of_items == 0) || (param == NULL))
1285 for (i = 0; i < number_of_items; i++) {
1286 kfree(param[i].path_name);
1287 kfree(param[i].node_name);
1293 #define MID_REQUEST_ALLOCATED 1
1294 #define MID_REQUEST_SUBMITTED 2
1295 #define MID_RESPONSE_RECEIVED 4
1296 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1297 #define MID_RESPONSE_MALFORMED 0x10
1298 #define MID_SHUTDOWN 0x20
1300 /* Types of response buffer returned from SendReceive2 */
1301 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1302 #define CIFS_SMALL_BUFFER 1
1303 #define CIFS_LARGE_BUFFER 2
1304 #define CIFS_IOVEC 4 /* array of response buffers */
1306 /* Type of Request to SendReceive2 */
1307 #define CIFS_BLOCKING_OP 1 /* operation can block */
1308 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1309 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1310 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1311 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1312 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1314 /* Type of request operation */
1315 #define CIFS_ECHO_OP 0x080 /* echo request */
1316 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1317 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1318 #define CIFS_OP_MASK 0x0380 /* mask request type */
1320 /* Security Flags: indicate type of session setup needed */
1321 #define CIFSSEC_MAY_SIGN 0x00001
1322 #define CIFSSEC_MAY_NTLM 0x00002
1323 #define CIFSSEC_MAY_NTLMV2 0x00004
1324 #define CIFSSEC_MAY_KRB5 0x00008
1325 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1326 #define CIFSSEC_MAY_LANMAN 0x00010
1327 #define CIFSSEC_MAY_PLNTXT 0x00020
1329 #define CIFSSEC_MAY_LANMAN 0
1330 #define CIFSSEC_MAY_PLNTXT 0
1331 #endif /* weak passwords */
1332 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1333 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1335 #define CIFSSEC_MUST_SIGN 0x01001
1336 /* note that only one of the following can be set so the
1337 result of setting MUST flags more than once will be to
1338 require use of the stronger protocol */
1339 #define CIFSSEC_MUST_NTLM 0x02002
1340 #define CIFSSEC_MUST_NTLMV2 0x04004
1341 #define CIFSSEC_MUST_KRB5 0x08008
1342 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1343 #define CIFSSEC_MUST_LANMAN 0x10010
1344 #define CIFSSEC_MUST_PLNTXT 0x20020
1345 #ifdef CONFIG_CIFS_UPCALL
1346 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1348 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1350 #else /* do not allow weak pw hash */
1351 #define CIFSSEC_MUST_LANMAN 0
1352 #define CIFSSEC_MUST_PLNTXT 0
1353 #ifdef CONFIG_CIFS_UPCALL
1354 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1356 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1358 #endif /* WEAK_PW_HASH */
1359 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1360 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1362 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1363 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1364 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1366 *****************************************************************
1367 * All constants go here
1368 *****************************************************************
1371 #define UID_HASH (16)
1374 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1375 * following to be declared.
1378 /****************************************************************************
1379 * Locking notes. All updates to global variables and lists should be
1380 * protected by spinlocks or semaphores.
1384 * GlobalMid_Lock protects:
1385 * list operations on pending_mid_q and oplockQ
1386 * updates to XID counters, multiplex id and SMB sequence numbers
1387 * cifs_file_list_lock protects:
1388 * list operations on tcp and SMB session lists and tCon lists
1389 * f_owner.lock protects certain per file struct operations
1390 * mapping->page_lock protects certain per page operations
1394 * sesSem operations on smb session
1395 * tconSem operations on tree connection
1396 * fh_sem file handle reconnection operations
1398 ****************************************************************************/
1400 #ifdef DECLARE_GLOBALS_HERE
1401 #define GLOBAL_EXTERN
1403 #define GLOBAL_EXTERN extern
1407 * the list of TCP_Server_Info structures, ie each of the sockets
1408 * connecting our client to a distinct server (ip address), is
1409 * chained together by cifs_tcp_ses_list. The list of all our SMB
1410 * sessions (and from that the tree connections) can be found
1411 * by iterating over cifs_tcp_ses_list
1413 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1416 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1417 * tcp session, and the list of tcon's per smb session. It also protects
1418 * the reference counters for the server, smb session, and tcon. Finally,
1419 * changes to the tcon->tidStatus should be done while holding this lock.
1421 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1424 * This lock protects the cifs_file->llist and cifs_file->flist
1425 * list operations, and updates to some flags (cifs_file->invalidHandle)
1426 * It will be moved to either use the tcon->stat_lock or equivalent later.
1427 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1428 * the cifs_tcp_ses_lock must be grabbed first and released last.
1430 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1432 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1433 /* Outstanding dir notify requests */
1434 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1435 /* DirNotify response queue */
1436 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1437 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1440 * Global transaction id (XID) information
1442 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1443 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1444 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1445 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1446 /* on midQ entries */
1448 * Global counters, updated atomically
1450 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1451 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1452 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1453 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1454 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1456 /* Various Debug counters */
1457 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1458 #ifdef CONFIG_CIFS_STATS2
1459 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1460 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1462 GLOBAL_EXTERN atomic_t smBufAllocCount;
1463 GLOBAL_EXTERN atomic_t midCount;
1466 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1467 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1468 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1469 with more secure ntlmssp2 challenge/resp */
1470 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1471 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1472 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1473 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1474 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1475 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1477 #ifdef CONFIG_CIFS_ACL
1478 GLOBAL_EXTERN struct rb_root uidtree;
1479 GLOBAL_EXTERN struct rb_root gidtree;
1480 GLOBAL_EXTERN spinlock_t siduidlock;
1481 GLOBAL_EXTERN spinlock_t sidgidlock;
1482 GLOBAL_EXTERN struct rb_root siduidtree;
1483 GLOBAL_EXTERN struct rb_root sidgidtree;
1484 GLOBAL_EXTERN spinlock_t uidsidlock;
1485 GLOBAL_EXTERN spinlock_t gidsidlock;
1486 #endif /* CONFIG_CIFS_ACL */
1488 void cifs_oplock_break(struct work_struct *work);
1490 extern const struct slow_work_ops cifs_oplock_break_ops;
1491 extern struct workqueue_struct *cifsiod_wq;
1493 extern mempool_t *cifs_mid_poolp;
1495 /* Operations for different SMB versions */
1496 #define SMB1_VERSION_STRING "1.0"
1497 extern struct smb_version_operations smb1_operations;
1498 extern struct smb_version_values smb1_values;
1499 #define SMB21_VERSION_STRING "2.1"
1500 extern struct smb_version_operations smb21_operations;
1501 extern struct smb_version_values smb21_values;
1502 #endif /* _CIFS_GLOB_H */