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 */
187 struct TCP_Server_Info;
191 struct dfs_info3_param;
195 struct cifs_readdata;
196 struct cifs_writedata;
197 struct cifs_io_parms;
198 struct cifs_search_info;
199 struct cifsInodeInfo;
201 struct smb_version_operations {
202 int (*send_cancel)(struct TCP_Server_Info *, void *,
203 struct mid_q_entry *);
204 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
205 /* setup request: allocate mid, sign message */
206 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
208 /* setup async request: allocate mid, sign message */
209 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
211 /* check response: verify signature, map error */
212 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
214 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
216 void (*set_credits)(struct TCP_Server_Info *, const int);
217 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
218 unsigned int (*get_credits)(struct mid_q_entry *);
219 __u64 (*get_next_mid)(struct TCP_Server_Info *);
220 /* data offset from read response message */
221 unsigned int (*read_data_offset)(char *);
222 /* data length from read response message */
223 unsigned int (*read_data_length)(char *);
224 /* map smb to linux error */
225 int (*map_error)(char *, bool);
226 /* find mid corresponding to the response message */
227 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
228 void (*dump_detail)(void *);
229 void (*clear_stats)(struct cifs_tcon *);
230 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
231 /* verify the message */
232 int (*check_message)(char *, unsigned int);
233 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
234 /* process transaction2 response */
235 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
237 /* check if we need to negotiate */
238 bool (*need_neg)(struct TCP_Server_Info *);
239 /* negotiate to the server */
240 int (*negotiate)(const unsigned int, struct cifs_ses *);
241 /* set negotiated write size */
242 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
243 /* set negotiated read size */
244 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
245 /* setup smb sessionn */
246 int (*sess_setup)(const unsigned int, struct cifs_ses *,
247 const struct nls_table *);
248 /* close smb session */
249 int (*logoff)(const unsigned int, struct cifs_ses *);
250 /* connect to a server share */
251 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
252 struct cifs_tcon *, const struct nls_table *);
253 /* close tree connecion */
254 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
255 /* get DFS referrals */
256 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
257 const char *, struct dfs_info3_param **,
258 unsigned int *, const struct nls_table *, int);
259 /* informational QFS call */
260 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
261 /* check if a path is accessible or not */
262 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
263 struct cifs_sb_info *, const char *);
264 /* query path data from the server */
265 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
266 struct cifs_sb_info *, const char *,
267 FILE_ALL_INFO *, bool *);
268 /* query file data from the server */
269 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
270 struct cifs_fid *, FILE_ALL_INFO *);
271 /* get server index number */
272 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
273 struct cifs_sb_info *, const char *,
274 u64 *uniqueid, FILE_ALL_INFO *);
275 /* set size by path */
276 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
277 const char *, __u64, struct cifs_sb_info *, bool);
278 /* set size by file handle */
279 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
280 struct cifsFileInfo *, __u64, bool);
282 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
284 /* check if we can send an echo or nor */
285 bool (*can_echo)(struct TCP_Server_Info *);
286 /* send echo request */
287 int (*echo)(struct TCP_Server_Info *);
288 /* create directory */
289 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
290 struct cifs_sb_info *);
291 /* set info on created directory */
292 void (*mkdir_setinfo)(struct inode *, const char *,
293 struct cifs_sb_info *, struct cifs_tcon *,
295 /* remove directory */
296 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
297 struct cifs_sb_info *);
299 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
300 struct cifs_sb_info *);
301 /* open, rename and delete file */
302 int (*rename_pending_delete)(const char *, struct dentry *,
304 /* send rename request */
305 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
306 const char *, struct cifs_sb_info *);
307 /* send create hardlink request */
308 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
309 const char *, const char *,
310 struct cifs_sb_info *);
311 /* open a file for non-posix mounts */
312 int (*open)(const unsigned int, struct cifs_tcon *, const char *, int,
313 int, int, struct cifs_fid *, __u32 *, FILE_ALL_INFO *,
314 struct cifs_sb_info *);
315 /* set fid protocol-specific info */
316 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
318 void (*close)(const unsigned int, struct cifs_tcon *,
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 *);
364 /* get lease key of the inode */
365 void (*get_lease_key)(struct inode *, struct cifs_fid *fid);
366 /* set lease key of the inode */
367 void (*set_lease_key)(struct inode *, struct cifs_fid *fid);
368 /* generate new lease key */
369 void (*new_lease_key)(struct cifs_fid *fid);
370 int (*calc_signature)(struct smb_rqst *rqst,
371 struct TCP_Server_Info *server);
374 struct smb_version_values {
375 char *version_string;
377 __u32 req_capabilities;
378 __u32 large_lock_type;
379 __u32 exclusive_lock_type;
380 __u32 shared_lock_type;
381 __u32 unlock_lock_type;
383 size_t max_header_size;
384 size_t read_rsp_size;
386 unsigned int cap_unix;
387 unsigned int cap_nt_find;
388 unsigned int cap_large_files;
391 #define HEADER_SIZE(server) (server->vals->header_size)
392 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
399 char *iocharset; /* local code page for mapping to and from Unicode */
400 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
401 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
417 bool no_psx_acl:1; /* set if posix acl support should be disabled */
419 bool backupuid_specified; /* mount option backupuid is specified */
420 bool backupgid_specified; /* mount option backupgid is specified */
421 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
422 bool server_ino:1; /* use inode numbers from server ie UniqueId */
424 bool strict_io:1; /* strict cache behavior */
425 bool remap:1; /* set to remap seven reserved chars in filenames */
426 bool posix_paths:1; /* unset to not ask for posix pathnames. */
429 bool nullauth:1; /* attempt to authenticate with null user */
430 bool nocase:1; /* request case insensitive filenames */
431 bool nobrl:1; /* disable sending byte range locks to srv */
432 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
433 bool seal:1; /* request transport encryption on share */
434 bool nodfs:1; /* Do not request DFS, even if available */
435 bool local_lease:1; /* check leases only on local system, not remote */
438 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
439 bool fsc:1; /* enable fscache */
440 bool mfsymlinks:1; /* use Minshall+French Symlinks */
442 bool rwpidforward:1; /* pid forward for read/write operations */
445 bool sockopt_tcp_nodelay:1;
446 unsigned long actimeo; /* attribute cache timeout (jiffies) */
447 struct smb_version_operations *ops;
448 struct smb_version_values *vals;
450 struct sockaddr_storage dstaddr; /* destination address */
451 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
452 struct nls_table *local_nls;
455 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
456 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
457 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
458 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
459 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
460 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
461 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
462 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
463 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
464 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
466 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
467 MS_NODEV | MS_SYNCHRONOUS)
469 struct cifs_mnt_data {
470 struct cifs_sb_info *cifs_sb;
475 static inline unsigned int
476 get_rfc1002_length(void *buf)
478 return be32_to_cpu(*((__be32 *)buf));
482 inc_rfc1001_len(void *buf, int count)
484 be32_add_cpu((__be32 *)buf, count);
487 struct TCP_Server_Info {
488 struct list_head tcp_ses_list;
489 struct list_head smb_ses_list;
490 int srv_count; /* reference counter */
491 /* 15 character server name + 0x20 16th byte indicating type = srv */
492 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
493 struct smb_version_operations *ops;
494 struct smb_version_values *vals;
495 enum statusEnum tcpStatus; /* what we think the status is */
496 char *hostname; /* hostname portion of UNC string */
497 struct socket *ssocket;
498 struct sockaddr_storage dstaddr;
499 struct sockaddr_storage srcaddr; /* locally bind to this IP */
503 wait_queue_head_t response_q;
504 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
505 struct list_head pending_mid_q;
506 bool noblocksnd; /* use blocking sendmsg */
507 bool noautotune; /* do not autotune send buf sizes */
509 int credits; /* send no more requests at once */
510 unsigned int in_flight; /* number of requests on the wire to server */
511 spinlock_t req_lock; /* protect the two values above */
512 struct mutex srv_mutex;
513 struct task_struct *tsk;
514 char server_GUID[16];
516 bool session_estab; /* mark when very first sess is established */
517 #ifdef CONFIG_CIFS_SMB2
518 int echo_credits; /* echo reserved slots */
519 int oplock_credits; /* oplock break reserved slots */
520 bool echoes:1; /* enable echoes */
522 u16 dialect; /* dialect index that server chose */
523 enum securityEnum secType;
524 bool oplocks:1; /* enable oplocks */
525 unsigned int maxReq; /* Clients should submit no more */
526 /* than maxReq distinct unanswered SMBs to the server when using */
527 /* multiplexed reads or writes */
528 unsigned int maxBuf; /* maxBuf specifies the maximum */
529 /* message size the server can send or receive for non-raw SMBs */
530 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
531 /* when socket is setup (and during reconnect) before NegProt sent */
532 unsigned int max_rw; /* maxRw specifies the maximum */
533 /* message size the server can send or receive for */
534 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
535 unsigned int max_vcs; /* maximum number of smb sessions, at least
536 those that can be specified uniquely with
538 unsigned int capabilities; /* selective disabling of caps by smb sess */
539 int timeAdj; /* Adjust for difference in server time zone in sec */
540 __u64 CurrentMid; /* multiplex id - rotating counter */
541 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
542 /* 16th byte of RFC1001 workstation name is always null */
543 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
544 __u32 sequence_number; /* for signing, protected by srv_mutex */
545 struct session_key session_key;
546 unsigned long lstrp; /* when we got last response from this server */
547 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
548 /* extended security flavors that server supports */
549 bool sec_ntlmssp; /* supports NTLMSSP */
550 bool sec_kerberosu2u; /* supports U2U Kerberos */
551 bool sec_kerberos; /* supports plain Kerberos */
552 bool sec_mskerberos; /* supports legacy MS Kerberos */
553 bool large_buf; /* is current buffer large? */
554 struct delayed_work echo; /* echo ping workqueue job */
555 struct kvec *iov; /* reusable kvec array for receives */
556 unsigned int nr_iov; /* number of kvecs in array */
557 char *smallbuf; /* pointer to current "small" buffer */
558 char *bigbuf; /* pointer to current "big" buffer */
559 unsigned int total_read; /* total amount of data read in this pass */
560 #ifdef CONFIG_CIFS_FSCACHE
561 struct fscache_cookie *fscache; /* client index cache cookie */
563 #ifdef CONFIG_CIFS_STATS2
564 atomic_t in_send; /* requests trying to send */
565 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
567 #ifdef CONFIG_CIFS_SMB2
568 unsigned int max_read;
569 unsigned int max_write;
570 #endif /* CONFIG_CIFS_SMB2 */
573 static inline unsigned int
574 in_flight(struct TCP_Server_Info *server)
577 spin_lock(&server->req_lock);
578 num = server->in_flight;
579 spin_unlock(&server->req_lock);
584 has_credits(struct TCP_Server_Info *server, int *credits)
587 spin_lock(&server->req_lock);
589 spin_unlock(&server->req_lock);
594 add_credits(struct TCP_Server_Info *server, const unsigned int add,
597 server->ops->add_credits(server, add, optype);
601 set_credits(struct TCP_Server_Info *server, const int val)
603 server->ops->set_credits(server, val);
607 get_next_mid(struct TCP_Server_Info *server)
609 return server->ops->get_next_mid(server);
613 * When the server supports very large reads and writes via POSIX extensions,
614 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
615 * including the RFC1001 length.
617 * Note that this might make for "interesting" allocation problems during
618 * writeback however as we have to allocate an array of pointers for the
619 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
621 * For reads, there is a similar problem as we need to allocate an array
622 * of kvecs to handle the receive, though that should only need to be done
625 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
626 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
629 * When the server doesn't allow large posix writes, only allow a rsize/wsize
630 * of 2^17-1 minus the size of the call header. That allows for a read or
631 * write up to the maximum size described by RFC1002.
633 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
634 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
637 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
638 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
639 * a single wsize request with a single call.
641 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
644 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
645 * those values when posix extensions aren't in force. In actuality here, we
646 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
647 * to be ok with the extra byte even though Windows doesn't send writes that
652 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
654 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
655 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
658 * Macros to allow the TCP_Server_Info->net field and related code to drop out
659 * when CONFIG_NET_NS isn't set.
664 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
669 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
676 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
681 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
688 * Session structure. One of these for each uid session with a particular host
691 struct list_head smb_ses_list;
692 struct list_head tcon_list;
693 struct mutex session_mutex;
694 struct TCP_Server_Info *server; /* pointer to server info */
695 int ses_count; /* reference counter */
696 enum statusEnum status;
697 unsigned overrideSecFlg; /* if non-zero override global sec flags */
698 __u16 ipc_tid; /* special tid for connection to IPC share */
701 char *serverOS; /* name of operating system underlying server */
702 char *serverNOS; /* name of network operating system of server */
703 char *serverDomain; /* security realm of server */
704 __u64 Suid; /* remote smb uid */
705 uid_t linux_uid; /* overriding owner of files on the mount */
706 uid_t cred_uid; /* owner of credentials */
707 unsigned int capabilities;
708 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
709 TCP names - will ipv6 and sctp addresses fit? */
710 char *user_name; /* must not be null except during init of sess
711 and after mount option parsing we fill it */
714 struct session_key auth_key;
715 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
716 bool need_reconnect:1; /* connection reset, uid now invalid */
717 #ifdef CONFIG_CIFS_SMB2
719 #endif /* CONFIG_CIFS_SMB2 */
722 /* no more than one of the following three session flags may be set */
723 #define CIFS_SES_NT4 1
724 #define CIFS_SES_OS2 2
725 #define CIFS_SES_W9X 4
726 /* following flag is set for old servers such as OS2 (and Win95?)
727 which do not negotiate NTLM or POSIX dialects, but instead
728 negotiate one of the older LANMAN dialects */
729 #define CIFS_SES_LANMAN 8
732 cap_unix(struct cifs_ses *ses)
734 return ses->server->vals->cap_unix & ses->capabilities;
738 * there is one of these for each connection to a resource on a particular
742 struct list_head tcon_list;
744 struct list_head openFileList;
745 struct cifs_ses *ses; /* pointer to session associated with */
746 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
747 char *nativeFileSystem;
748 char *password; /* for share-level security */
749 __u32 tid; /* The 4 byte tree id */
750 __u16 Flags; /* optional support bits */
751 enum statusEnum tidStatus;
752 #ifdef CONFIG_CIFS_STATS
753 atomic_t num_smbs_sent;
758 atomic_t num_flushes;
759 atomic_t num_oplock_brks;
762 atomic_t num_deletes;
764 atomic_t num_posixopens;
765 atomic_t num_posixmkdirs;
767 atomic_t num_renames;
768 atomic_t num_t2renames;
772 atomic_t num_hardlinks;
773 atomic_t num_symlinks;
775 atomic_t num_acl_get;
776 atomic_t num_acl_set;
778 #ifdef CONFIG_CIFS_SMB2
780 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
781 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
783 #endif /* CONFIG_CIFS_SMB2 */
785 #ifdef CONFIG_CIFS_STATS2
786 unsigned long long time_writes;
787 unsigned long long time_reads;
788 unsigned long long time_opens;
789 unsigned long long time_deletes;
790 unsigned long long time_closes;
791 unsigned long long time_mkdirs;
792 unsigned long long time_rmdirs;
793 unsigned long long time_renames;
794 unsigned long long time_t2renames;
795 unsigned long long time_ffirst;
796 unsigned long long time_fnext;
797 unsigned long long time_fclose;
798 #endif /* CONFIG_CIFS_STATS2 */
801 spinlock_t stat_lock;
802 #endif /* CONFIG_CIFS_STATS */
803 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
804 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
805 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
806 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
809 bool seal:1; /* transport encryption for this mounted share */
810 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
811 for this mount even if server would support */
812 bool local_lease:1; /* check leases (only) on local system not remote */
813 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
814 bool need_reconnect:1; /* connection reset, tid now invalid */
815 #ifdef CONFIG_CIFS_SMB2
816 bool print:1; /* set if connection to printer share */
817 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
820 __u32 maximal_access;
821 __u32 vol_serial_number;
822 __le64 vol_create_time;
823 #endif /* CONFIG_CIFS_SMB2 */
824 #ifdef CONFIG_CIFS_FSCACHE
825 u64 resource_id; /* server resource id */
826 struct fscache_cookie *fscache; /* cookie for share */
828 struct list_head pending_opens; /* list of incomplete opens */
829 /* BB add field for back pointer to sb struct(s)? */
833 * This is a refcounted and timestamped container for a tcon pointer. The
834 * container holds a tcon reference. It is considered safe to free one of
835 * these when the tl_count goes to 0. The tl_time is the time of the last
836 * "get" on the container.
839 struct rb_node tl_rbnode;
841 unsigned long tl_flags;
842 #define TCON_LINK_MASTER 0
843 #define TCON_LINK_PENDING 1
844 #define TCON_LINK_IN_TREE 2
845 unsigned long tl_time;
847 struct cifs_tcon *tl_tcon;
850 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
852 static inline struct cifs_tcon *
853 tlink_tcon(struct tcon_link *tlink)
855 return tlink->tl_tcon;
858 extern void cifs_put_tlink(struct tcon_link *tlink);
860 static inline struct tcon_link *
861 cifs_get_tlink(struct tcon_link *tlink)
863 if (tlink && !IS_ERR(tlink))
864 atomic_inc(&tlink->tl_count);
868 /* This function is always expected to succeed */
869 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
871 #define CIFS_OPLOCK_NO_CHANGE 0xfe
873 struct cifs_pending_open {
874 struct list_head olist;
875 struct tcon_link *tlink;
881 * This info hangs off the cifsFileInfo structure, pointed to by llist.
882 * This is used to track byte stream locks on the file
884 struct cifsLockInfo {
885 struct list_head llist; /* pointer to next cifsLockInfo */
886 struct list_head blist; /* pointer to locks blocked on this */
887 wait_queue_head_t block_q;
895 * One of these for each open instance of a file
897 struct cifs_search_info {
898 loff_t index_of_last_entry;
899 __u16 entries_in_buffer;
902 char *ntwrk_buf_start;
903 char *srch_entries_start;
905 const char *presume_name;
906 unsigned int resume_name_len;
910 bool smallBuf:1; /* so we know which buf_release function to call */
915 #ifdef CONFIG_CIFS_SMB2
916 __u64 persistent_fid; /* persist file id for smb2 */
917 __u64 volatile_fid; /* volatile file id for smb2 */
918 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
920 struct cifs_pending_open *pending_open;
923 struct cifs_fid_locks {
924 struct list_head llist;
925 struct cifsFileInfo *cfile; /* fid that owns locks */
926 struct list_head locks; /* locks held by fid above */
929 struct cifsFileInfo {
930 struct list_head tlist; /* pointer to next fid owned by tcon */
931 struct list_head flist; /* next fid (file instance) for this inode */
932 struct cifs_fid_locks *llist; /* brlocks held by this fid */
933 unsigned int uid; /* allows finding which FileInfo structure */
934 __u32 pid; /* process id who opened file */
935 struct cifs_fid fid; /* file id from remote */
936 /* BB add lock scope info here if needed */ ;
937 /* lock scope id (0 if none) */
938 struct dentry *dentry;
939 unsigned int f_flags;
940 struct tcon_link *tlink;
941 bool invalidHandle:1; /* file closed via session abend */
942 bool oplock_break_cancelled:1;
943 int count; /* refcount protected by cifs_file_list_lock */
944 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
945 struct cifs_search_info srch_inf;
946 struct work_struct oplock_break; /* work for oplock breaks */
949 struct cifs_io_parms {
951 #ifdef CONFIG_CIFS_SMB2
952 __u64 persistent_fid; /* persist file id for smb2 */
953 __u64 volatile_fid; /* volatile file id for smb2 */
958 struct cifs_tcon *tcon;
961 struct cifs_readdata;
963 /* asynchronous read support */
964 struct cifs_readdata {
965 struct kref refcount;
966 struct list_head list;
967 struct completion done;
968 struct cifsFileInfo *cfile;
969 struct address_space *mapping;
974 struct work_struct work;
975 int (*read_into_pages)(struct TCP_Server_Info *server,
976 struct cifs_readdata *rdata,
981 unsigned int nr_pages;
982 struct page *pages[];
985 struct cifs_writedata;
987 /* asynchronous write support */
988 struct cifs_writedata {
989 struct kref refcount;
990 struct list_head list;
991 struct completion done;
992 enum writeback_sync_modes sync_mode;
993 struct work_struct work;
994 struct cifsFileInfo *cfile;
1000 unsigned int tailsz;
1001 unsigned int nr_pages;
1002 struct page *pages[1];
1006 * Take a reference on the file private data. Must be called with
1007 * cifs_file_list_lock held.
1010 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1015 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1016 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1019 * One of these for each file inode
1022 struct cifsInodeInfo {
1023 bool can_cache_brlcks;
1024 struct list_head llist; /* locks helb by this inode */
1025 struct rw_semaphore lock_sem; /* protect the fields above */
1026 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1027 struct list_head openFileList;
1028 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1029 bool clientCanCacheRead; /* read oplock */
1030 bool clientCanCacheAll; /* read and writebehind oplock */
1031 bool delete_pending; /* DELETE_ON_CLOSE is set */
1032 bool invalid_mapping; /* pagecache is invalid */
1033 bool leave_pages_clean; /* protected by i_mutex, not set pages dirty */
1034 unsigned long time; /* jiffies of last update of inode */
1035 u64 server_eof; /* current file size on server -- protected by i_lock */
1036 u64 uniqueid; /* server inode number */
1037 u64 createtime; /* creation time on server */
1038 #ifdef CONFIG_CIFS_SMB2
1039 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1041 #ifdef CONFIG_CIFS_FSCACHE
1042 struct fscache_cookie *fscache;
1044 struct inode vfs_inode;
1047 static inline struct cifsInodeInfo *
1048 CIFS_I(struct inode *inode)
1050 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1053 static inline struct cifs_sb_info *
1054 CIFS_SB(struct super_block *sb)
1056 return sb->s_fs_info;
1059 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1061 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1068 convert_delimiter(char *path, char delim)
1070 char old_delim, *pos;
1078 while ((pos = strchr(pos, old_delim)))
1082 #ifdef CONFIG_CIFS_STATS
1083 #define cifs_stats_inc atomic_inc
1085 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1089 spin_lock(&tcon->stat_lock);
1090 tcon->bytes_written += bytes;
1091 spin_unlock(&tcon->stat_lock);
1095 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1098 spin_lock(&tcon->stat_lock);
1099 tcon->bytes_read += bytes;
1100 spin_unlock(&tcon->stat_lock);
1104 #define cifs_stats_inc(field) do {} while (0)
1105 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1106 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1112 * This is the prototype for the mid receive function. This function is for
1113 * receiving the rest of the SMB frame, starting with the WordCount (which is
1114 * just after the MID in struct smb_hdr). Note:
1116 * - This will be called by cifsd, with no locks held.
1117 * - The mid will still be on the pending_mid_q.
1118 * - mid->resp_buf will point to the current buffer.
1120 * Returns zero on a successful receive, or an error. The receive state in
1121 * the TCP_Server_Info will also be updated.
1123 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1124 struct mid_q_entry *mid);
1127 * This is the prototype for the mid callback function. This is called once the
1128 * mid has been received off of the socket. When creating one, take special
1129 * care to avoid deadlocks. Things to bear in mind:
1131 * - it will be called by cifsd, with no locks held
1132 * - the mid will be removed from any lists
1134 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1136 /* one of these for every pending CIFS request to the server */
1137 struct mid_q_entry {
1138 struct list_head qhead; /* mids waiting on reply from this server */
1139 struct TCP_Server_Info *server; /* server corresponding to this mid */
1140 __u64 mid; /* multiplex id */
1141 __u32 pid; /* process id */
1142 __u32 sequence_number; /* for CIFS signing */
1143 unsigned long when_alloc; /* when mid was created */
1144 #ifdef CONFIG_CIFS_STATS2
1145 unsigned long when_sent; /* time when smb send finished */
1146 unsigned long when_received; /* when demux complete (taken off wire) */
1148 mid_receive_t *receive; /* call receive callback */
1149 mid_callback_t *callback; /* call completion callback */
1150 void *callback_data; /* general purpose pointer for callback */
1151 void *resp_buf; /* pointer to received SMB header */
1152 int mid_state; /* wish this were enum but can not pass to wait_event */
1153 __le16 command; /* smb command code */
1154 bool large_buf:1; /* if valid response, is pointer to large buf */
1155 bool multiRsp:1; /* multiple trans2 responses for one request */
1156 bool multiEnd:1; /* both received */
1159 /* Make code in transport.c a little cleaner by moving
1160 update of optional stats into function below */
1161 #ifdef CONFIG_CIFS_STATS2
1163 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1165 atomic_inc(&server->in_send);
1168 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1170 atomic_dec(&server->in_send);
1173 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1175 atomic_inc(&server->num_waiters);
1178 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1180 atomic_dec(&server->num_waiters);
1183 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1185 mid->when_sent = jiffies;
1188 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1191 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1195 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1199 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1203 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1208 /* for pending dnotify requests */
1209 struct dir_notify_req {
1210 struct list_head lhead;
1217 __u32 filter; /* CompletionFilter (for multishot) */
1222 struct dfs_info3_param {
1223 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1232 * common struct for holding inode info when searching for or updating an
1233 * inode with new info
1236 #define CIFS_FATTR_DFS_REFERRAL 0x1
1237 #define CIFS_FATTR_DELETE_PENDING 0x2
1238 #define CIFS_FATTR_NEED_REVAL 0x4
1239 #define CIFS_FATTR_INO_COLLISION 0x8
1252 unsigned int cf_nlink;
1253 unsigned int cf_dtype;
1254 struct timespec cf_atime;
1255 struct timespec cf_mtime;
1256 struct timespec cf_ctime;
1259 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1262 kfree(param->path_name);
1263 kfree(param->node_name);
1268 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1269 int number_of_items)
1272 if ((number_of_items == 0) || (param == NULL))
1274 for (i = 0; i < number_of_items; i++) {
1275 kfree(param[i].path_name);
1276 kfree(param[i].node_name);
1282 #define MID_REQUEST_ALLOCATED 1
1283 #define MID_REQUEST_SUBMITTED 2
1284 #define MID_RESPONSE_RECEIVED 4
1285 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1286 #define MID_RESPONSE_MALFORMED 0x10
1287 #define MID_SHUTDOWN 0x20
1289 /* Types of response buffer returned from SendReceive2 */
1290 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1291 #define CIFS_SMALL_BUFFER 1
1292 #define CIFS_LARGE_BUFFER 2
1293 #define CIFS_IOVEC 4 /* array of response buffers */
1295 /* Type of Request to SendReceive2 */
1296 #define CIFS_BLOCKING_OP 1 /* operation can block */
1297 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1298 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1299 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1300 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1301 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1303 /* Type of request operation */
1304 #define CIFS_ECHO_OP 0x080 /* echo request */
1305 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1306 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1307 #define CIFS_OP_MASK 0x0380 /* mask request type */
1309 /* Security Flags: indicate type of session setup needed */
1310 #define CIFSSEC_MAY_SIGN 0x00001
1311 #define CIFSSEC_MAY_NTLM 0x00002
1312 #define CIFSSEC_MAY_NTLMV2 0x00004
1313 #define CIFSSEC_MAY_KRB5 0x00008
1314 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1315 #define CIFSSEC_MAY_LANMAN 0x00010
1316 #define CIFSSEC_MAY_PLNTXT 0x00020
1318 #define CIFSSEC_MAY_LANMAN 0
1319 #define CIFSSEC_MAY_PLNTXT 0
1320 #endif /* weak passwords */
1321 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1322 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1324 #define CIFSSEC_MUST_SIGN 0x01001
1325 /* note that only one of the following can be set so the
1326 result of setting MUST flags more than once will be to
1327 require use of the stronger protocol */
1328 #define CIFSSEC_MUST_NTLM 0x02002
1329 #define CIFSSEC_MUST_NTLMV2 0x04004
1330 #define CIFSSEC_MUST_KRB5 0x08008
1331 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1332 #define CIFSSEC_MUST_LANMAN 0x10010
1333 #define CIFSSEC_MUST_PLNTXT 0x20020
1334 #ifdef CONFIG_CIFS_UPCALL
1335 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1337 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1339 #else /* do not allow weak pw hash */
1340 #define CIFSSEC_MUST_LANMAN 0
1341 #define CIFSSEC_MUST_PLNTXT 0
1342 #ifdef CONFIG_CIFS_UPCALL
1343 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1345 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1347 #endif /* WEAK_PW_HASH */
1348 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1349 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1351 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMSSP)
1352 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1353 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1355 *****************************************************************
1356 * All constants go here
1357 *****************************************************************
1360 #define UID_HASH (16)
1363 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1364 * following to be declared.
1367 /****************************************************************************
1368 * Locking notes. All updates to global variables and lists should be
1369 * protected by spinlocks or semaphores.
1373 * GlobalMid_Lock protects:
1374 * list operations on pending_mid_q and oplockQ
1375 * updates to XID counters, multiplex id and SMB sequence numbers
1376 * cifs_file_list_lock protects:
1377 * list operations on tcp and SMB session lists and tCon lists
1378 * f_owner.lock protects certain per file struct operations
1379 * mapping->page_lock protects certain per page operations
1383 * sesSem operations on smb session
1384 * tconSem operations on tree connection
1385 * fh_sem file handle reconnection operations
1387 ****************************************************************************/
1389 #ifdef DECLARE_GLOBALS_HERE
1390 #define GLOBAL_EXTERN
1392 #define GLOBAL_EXTERN extern
1396 * the list of TCP_Server_Info structures, ie each of the sockets
1397 * connecting our client to a distinct server (ip address), is
1398 * chained together by cifs_tcp_ses_list. The list of all our SMB
1399 * sessions (and from that the tree connections) can be found
1400 * by iterating over cifs_tcp_ses_list
1402 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1405 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1406 * tcp session, and the list of tcon's per smb session. It also protects
1407 * the reference counters for the server, smb session, and tcon. Finally,
1408 * changes to the tcon->tidStatus should be done while holding this lock.
1410 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1413 * This lock protects the cifs_file->llist and cifs_file->flist
1414 * list operations, and updates to some flags (cifs_file->invalidHandle)
1415 * It will be moved to either use the tcon->stat_lock or equivalent later.
1416 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1417 * the cifs_tcp_ses_lock must be grabbed first and released last.
1419 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1421 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1422 /* Outstanding dir notify requests */
1423 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1424 /* DirNotify response queue */
1425 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1426 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1429 * Global transaction id (XID) information
1431 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1432 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1433 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1434 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1435 /* on midQ entries */
1437 * Global counters, updated atomically
1439 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1440 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1441 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1442 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1443 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1445 /* Various Debug counters */
1446 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1447 #ifdef CONFIG_CIFS_STATS2
1448 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1449 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1451 GLOBAL_EXTERN atomic_t smBufAllocCount;
1452 GLOBAL_EXTERN atomic_t midCount;
1455 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1456 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1457 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1458 with more secure ntlmssp2 challenge/resp */
1459 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1460 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1461 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1462 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1463 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1464 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1466 #ifdef CONFIG_CIFS_ACL
1467 GLOBAL_EXTERN struct rb_root uidtree;
1468 GLOBAL_EXTERN struct rb_root gidtree;
1469 GLOBAL_EXTERN spinlock_t siduidlock;
1470 GLOBAL_EXTERN spinlock_t sidgidlock;
1471 GLOBAL_EXTERN struct rb_root siduidtree;
1472 GLOBAL_EXTERN struct rb_root sidgidtree;
1473 GLOBAL_EXTERN spinlock_t uidsidlock;
1474 GLOBAL_EXTERN spinlock_t gidsidlock;
1475 #endif /* CONFIG_CIFS_ACL */
1477 void cifs_oplock_break(struct work_struct *work);
1479 extern const struct slow_work_ops cifs_oplock_break_ops;
1480 extern struct workqueue_struct *cifsiod_wq;
1482 extern mempool_t *cifs_mid_poolp;
1484 /* Operations for different SMB versions */
1485 #define SMB1_VERSION_STRING "1.0"
1486 extern struct smb_version_operations smb1_operations;
1487 extern struct smb_version_values smb1_values;
1488 #define SMB20_VERSION_STRING "2.0"
1489 /*extern struct smb_version_operations smb20_operations; */ /* not needed yet */
1490 extern struct smb_version_values smb20_values;
1491 #define SMB21_VERSION_STRING "2.1"
1492 extern struct smb_version_operations smb21_operations;
1493 extern struct smb_version_values smb21_values;
1494 #define SMB30_VERSION_STRING "3.0"
1495 extern struct smb_version_operations smb30_operations;
1496 extern struct smb_version_values smb30_values;
1497 #endif /* _CIFS_GLOB_H */