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 */
186 struct TCP_Server_Info;
190 struct dfs_info3_param;
194 struct cifs_readdata;
195 struct cifs_writedata;
196 struct cifs_io_parms;
197 struct cifs_search_info;
198 struct cifsInodeInfo;
200 struct smb_version_operations {
201 int (*send_cancel)(struct TCP_Server_Info *, void *,
202 struct mid_q_entry *);
203 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
204 /* setup request: allocate mid, sign message */
205 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
207 /* setup async request: allocate mid, sign message */
208 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
210 /* check response: verify signature, map error */
211 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
213 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
215 void (*set_credits)(struct TCP_Server_Info *, const int);
216 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
217 unsigned int (*get_credits)(struct mid_q_entry *);
218 __u64 (*get_next_mid)(struct TCP_Server_Info *);
219 /* data offset from read response message */
220 unsigned int (*read_data_offset)(char *);
221 /* data length from read response message */
222 unsigned int (*read_data_length)(char *);
223 /* map smb to linux error */
224 int (*map_error)(char *, bool);
225 /* find mid corresponding to the response message */
226 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
227 void (*dump_detail)(void *);
228 void (*clear_stats)(struct cifs_tcon *);
229 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
230 /* verify the message */
231 int (*check_message)(char *, unsigned int);
232 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
233 /* process transaction2 response */
234 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
236 /* check if we need to negotiate */
237 bool (*need_neg)(struct TCP_Server_Info *);
238 /* negotiate to the server */
239 int (*negotiate)(const unsigned int, struct cifs_ses *);
240 /* set negotiated write size */
241 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
242 /* set negotiated read size */
243 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
244 /* setup smb sessionn */
245 int (*sess_setup)(const unsigned int, struct cifs_ses *,
246 const struct nls_table *);
247 /* close smb session */
248 int (*logoff)(const unsigned int, struct cifs_ses *);
249 /* connect to a server share */
250 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
251 struct cifs_tcon *, const struct nls_table *);
252 /* close tree connecion */
253 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
254 /* get DFS referrals */
255 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
256 const char *, struct dfs_info3_param **,
257 unsigned int *, const struct nls_table *, int);
258 /* informational QFS call */
259 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
260 /* check if a path is accessible or not */
261 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
262 struct cifs_sb_info *, const char *);
263 /* query path data from the server */
264 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
265 struct cifs_sb_info *, const char *,
266 FILE_ALL_INFO *, bool *);
267 /* query file data from the server */
268 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
269 struct cifs_fid *, FILE_ALL_INFO *);
270 /* get server index number */
271 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
272 struct cifs_sb_info *, const char *,
273 u64 *uniqueid, FILE_ALL_INFO *);
274 /* set size by path */
275 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
276 const char *, __u64, struct cifs_sb_info *, bool);
277 /* set size by file handle */
278 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
279 struct cifsFileInfo *, __u64, bool);
281 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
283 /* build a full path to the root of the mount */
284 char * (*build_path_to_root)(struct smb_vol *, struct cifs_sb_info *,
286 /* check if we can send an echo or nor */
287 bool (*can_echo)(struct TCP_Server_Info *);
288 /* send echo request */
289 int (*echo)(struct TCP_Server_Info *);
290 /* create directory */
291 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
292 struct cifs_sb_info *);
293 /* set info on created directory */
294 void (*mkdir_setinfo)(struct inode *, const char *,
295 struct cifs_sb_info *, struct cifs_tcon *,
297 /* remove directory */
298 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
299 struct cifs_sb_info *);
301 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
302 struct cifs_sb_info *);
303 /* open, rename and delete file */
304 int (*rename_pending_delete)(const char *, struct dentry *,
306 /* send rename request */
307 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
308 const char *, struct cifs_sb_info *);
309 /* send create hardlink request */
310 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
311 const char *, const char *,
312 struct cifs_sb_info *);
313 /* open a file for non-posix mounts */
314 int (*open)(const unsigned int, struct cifs_tcon *, const char *, int,
315 int, int, struct cifs_fid *, __u32 *, FILE_ALL_INFO *,
316 struct cifs_sb_info *);
317 /* set fid protocol-specific info */
318 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
320 void (*close)(const unsigned int, struct cifs_tcon *,
322 /* send a flush request to the server */
323 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
324 /* async read from the server */
325 int (*async_readv)(struct cifs_readdata *);
326 /* async write to the server */
327 int (*async_writev)(struct cifs_writedata *);
328 /* sync read from the server */
329 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
330 struct cifs_io_parms *, unsigned int *, char **,
332 /* sync write to the server */
333 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
334 struct cifs_io_parms *, unsigned int *, struct kvec *,
336 /* open dir, start readdir */
337 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
338 const char *, struct cifs_sb_info *,
339 struct cifs_fid *, __u16,
340 struct cifs_search_info *);
341 /* continue readdir */
342 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
344 __u16, struct cifs_search_info *srch_inf);
346 int (*close_dir)(const unsigned int, struct cifs_tcon *,
348 /* calculate a size of SMB message */
349 unsigned int (*calc_smb_size)(void *);
350 /* check for STATUS_PENDING and process it in a positive case */
351 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
352 /* send oplock break response */
353 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
354 struct cifsInodeInfo *);
355 /* query remote filesystem */
356 int (*queryfs)(const unsigned int, struct cifs_tcon *,
358 /* send mandatory brlock to the server */
359 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
360 __u64, __u32, int, int, bool);
361 /* unlock range of mandatory locks */
362 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
364 /* push brlocks from the cache to the server */
365 int (*push_mand_locks)(struct cifsFileInfo *);
366 /* get lease key of the inode */
367 void (*get_lease_key)(struct inode *, struct cifs_fid *fid);
368 /* set lease key of the inode */
369 void (*set_lease_key)(struct inode *, struct cifs_fid *fid);
370 /* generate new lease key */
371 void (*new_lease_key)(struct cifs_fid *fid);
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)
400 char *iocharset; /* local code page for mapping to and from Unicode */
401 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
402 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
418 bool no_psx_acl:1; /* set if posix acl support should be disabled */
420 bool backupuid_specified; /* mount option backupuid is specified */
421 bool backupgid_specified; /* mount option backupgid is specified */
422 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
423 bool server_ino:1; /* use inode numbers from server ie UniqueId */
425 bool strict_io:1; /* strict cache behavior */
426 bool remap:1; /* set to remap seven reserved chars in filenames */
427 bool posix_paths:1; /* unset to not ask for posix pathnames. */
430 bool nullauth:1; /* attempt to authenticate with null user */
431 bool nocase:1; /* request case insensitive filenames */
432 bool nobrl:1; /* disable sending byte range locks to srv */
433 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
434 bool seal:1; /* request transport encryption on share */
435 bool nodfs:1; /* Do not request DFS, even if available */
436 bool local_lease:1; /* check leases only on local system, not remote */
439 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
440 bool fsc:1; /* enable fscache */
441 bool mfsymlinks:1; /* use Minshall+French Symlinks */
443 bool rwpidforward:1; /* pid forward for read/write operations */
446 bool sockopt_tcp_nodelay:1;
447 unsigned short int port;
448 unsigned long actimeo; /* attribute cache timeout (jiffies) */
449 struct smb_version_operations *ops;
450 struct smb_version_values *vals;
452 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
453 struct nls_table *local_nls;
456 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
457 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
458 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
459 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
460 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
461 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
462 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
463 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
464 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
465 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
467 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
468 MS_NODEV | MS_SYNCHRONOUS)
470 struct cifs_mnt_data {
471 struct cifs_sb_info *cifs_sb;
476 static inline unsigned int
477 get_rfc1002_length(void *buf)
479 return be32_to_cpu(*((__be32 *)buf));
483 inc_rfc1001_len(void *buf, int count)
485 be32_add_cpu((__be32 *)buf, count);
488 struct TCP_Server_Info {
489 struct list_head tcp_ses_list;
490 struct list_head smb_ses_list;
491 int srv_count; /* reference counter */
492 /* 15 character server name + 0x20 16th byte indicating type = srv */
493 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
494 struct smb_version_operations *ops;
495 struct smb_version_values *vals;
496 enum statusEnum tcpStatus; /* what we think the status is */
497 char *hostname; /* hostname portion of UNC string */
498 struct socket *ssocket;
499 struct sockaddr_storage dstaddr;
500 struct sockaddr_storage srcaddr; /* locally bind to this IP */
504 wait_queue_head_t response_q;
505 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
506 struct list_head pending_mid_q;
507 bool noblocksnd; /* use blocking sendmsg */
508 bool noautotune; /* do not autotune send buf sizes */
510 int credits; /* send no more requests at once */
511 unsigned int in_flight; /* number of requests on the wire to server */
512 spinlock_t req_lock; /* protect the two values above */
513 struct mutex srv_mutex;
514 struct task_struct *tsk;
515 char server_GUID[16];
517 bool session_estab; /* mark when very first sess is established */
518 #ifdef CONFIG_CIFS_SMB2
519 int echo_credits; /* echo reserved slots */
520 int oplock_credits; /* oplock break reserved slots */
521 bool echoes:1; /* enable echoes */
523 u16 dialect; /* dialect index that server chose */
524 enum securityEnum secType;
525 bool oplocks:1; /* enable oplocks */
526 unsigned int maxReq; /* Clients should submit no more */
527 /* than maxReq distinct unanswered SMBs to the server when using */
528 /* multiplexed reads or writes */
529 unsigned int maxBuf; /* maxBuf specifies the maximum */
530 /* message size the server can send or receive for non-raw SMBs */
531 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
532 /* when socket is setup (and during reconnect) before NegProt sent */
533 unsigned int max_rw; /* maxRw specifies the maximum */
534 /* message size the server can send or receive for */
535 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
536 unsigned int max_vcs; /* maximum number of smb sessions, at least
537 those that can be specified uniquely with
539 unsigned int capabilities; /* selective disabling of caps by smb sess */
540 int timeAdj; /* Adjust for difference in server time zone in sec */
541 __u64 CurrentMid; /* multiplex id - rotating counter */
542 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
543 /* 16th byte of RFC1001 workstation name is always null */
544 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
545 __u32 sequence_number; /* for signing, protected by srv_mutex */
546 struct session_key session_key;
547 unsigned long lstrp; /* when we got last response from this server */
548 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
549 /* extended security flavors that server supports */
550 bool sec_ntlmssp; /* supports NTLMSSP */
551 bool sec_kerberosu2u; /* supports U2U Kerberos */
552 bool sec_kerberos; /* supports plain Kerberos */
553 bool sec_mskerberos; /* supports legacy MS Kerberos */
554 bool large_buf; /* is current buffer large? */
555 struct delayed_work echo; /* echo ping workqueue job */
556 struct kvec *iov; /* reusable kvec array for receives */
557 unsigned int nr_iov; /* number of kvecs in array */
558 char *smallbuf; /* pointer to current "small" buffer */
559 char *bigbuf; /* pointer to current "big" buffer */
560 unsigned int total_read; /* total amount of data read in this pass */
561 #ifdef CONFIG_CIFS_FSCACHE
562 struct fscache_cookie *fscache; /* client index cache cookie */
564 #ifdef CONFIG_CIFS_STATS2
565 atomic_t in_send; /* requests trying to send */
566 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
568 #ifdef CONFIG_CIFS_SMB2
569 unsigned int max_read;
570 unsigned int max_write;
571 #endif /* CONFIG_CIFS_SMB2 */
574 static inline unsigned int
575 in_flight(struct TCP_Server_Info *server)
578 spin_lock(&server->req_lock);
579 num = server->in_flight;
580 spin_unlock(&server->req_lock);
585 has_credits(struct TCP_Server_Info *server, int *credits)
588 spin_lock(&server->req_lock);
590 spin_unlock(&server->req_lock);
595 add_credits(struct TCP_Server_Info *server, const unsigned int add,
598 server->ops->add_credits(server, add, optype);
602 set_credits(struct TCP_Server_Info *server, const int val)
604 server->ops->set_credits(server, val);
608 get_next_mid(struct TCP_Server_Info *server)
610 return server->ops->get_next_mid(server);
614 * When the server supports very large reads and writes via POSIX extensions,
615 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
616 * including the RFC1001 length.
618 * Note that this might make for "interesting" allocation problems during
619 * writeback however as we have to allocate an array of pointers for the
620 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
622 * For reads, there is a similar problem as we need to allocate an array
623 * of kvecs to handle the receive, though that should only need to be done
626 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
627 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
630 * When the server doesn't allow large posix writes, only allow a rsize/wsize
631 * of 2^17-1 minus the size of the call header. That allows for a read or
632 * write up to the maximum size described by RFC1002.
634 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
635 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
638 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
639 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
640 * a single wsize request with a single call.
642 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
645 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
646 * those values when posix extensions aren't in force. In actuality here, we
647 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
648 * to be ok with the extra byte even though Windows doesn't send writes that
653 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
655 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
656 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
659 * Macros to allow the TCP_Server_Info->net field and related code to drop out
660 * when CONFIG_NET_NS isn't set.
665 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
670 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
677 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
682 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
689 * Session structure. One of these for each uid session with a particular host
692 struct list_head smb_ses_list;
693 struct list_head tcon_list;
694 struct mutex session_mutex;
695 struct TCP_Server_Info *server; /* pointer to server info */
696 int ses_count; /* reference counter */
697 enum statusEnum status;
698 unsigned overrideSecFlg; /* if non-zero override global sec flags */
699 __u16 ipc_tid; /* special tid for connection to IPC share */
702 char *serverOS; /* name of operating system underlying server */
703 char *serverNOS; /* name of network operating system of server */
704 char *serverDomain; /* security realm of server */
705 __u64 Suid; /* remote smb uid */
706 uid_t linux_uid; /* overriding owner of files on the mount */
707 uid_t cred_uid; /* owner of credentials */
708 unsigned int capabilities;
709 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
710 TCP names - will ipv6 and sctp addresses fit? */
711 char *user_name; /* must not be null except during init of sess
712 and after mount option parsing we fill it */
715 struct session_key auth_key;
716 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
717 bool need_reconnect:1; /* connection reset, uid now invalid */
718 #ifdef CONFIG_CIFS_SMB2
720 #endif /* CONFIG_CIFS_SMB2 */
723 /* no more than one of the following three session flags may be set */
724 #define CIFS_SES_NT4 1
725 #define CIFS_SES_OS2 2
726 #define CIFS_SES_W9X 4
727 /* following flag is set for old servers such as OS2 (and Win95?)
728 which do not negotiate NTLM or POSIX dialects, but instead
729 negotiate one of the older LANMAN dialects */
730 #define CIFS_SES_LANMAN 8
733 cap_unix(struct cifs_ses *ses)
735 return ses->server->vals->cap_unix & ses->capabilities;
739 * there is one of these for each connection to a resource on a particular
743 struct list_head tcon_list;
745 struct list_head openFileList;
746 struct cifs_ses *ses; /* pointer to session associated with */
747 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
748 char *nativeFileSystem;
749 char *password; /* for share-level security */
750 __u32 tid; /* The 4 byte tree id */
751 __u16 Flags; /* optional support bits */
752 enum statusEnum tidStatus;
753 #ifdef CONFIG_CIFS_STATS
754 atomic_t num_smbs_sent;
759 atomic_t num_flushes;
760 atomic_t num_oplock_brks;
763 atomic_t num_deletes;
765 atomic_t num_posixopens;
766 atomic_t num_posixmkdirs;
768 atomic_t num_renames;
769 atomic_t num_t2renames;
773 atomic_t num_hardlinks;
774 atomic_t num_symlinks;
776 atomic_t num_acl_get;
777 atomic_t num_acl_set;
779 #ifdef CONFIG_CIFS_SMB2
781 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
782 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
784 #endif /* CONFIG_CIFS_SMB2 */
786 #ifdef CONFIG_CIFS_STATS2
787 unsigned long long time_writes;
788 unsigned long long time_reads;
789 unsigned long long time_opens;
790 unsigned long long time_deletes;
791 unsigned long long time_closes;
792 unsigned long long time_mkdirs;
793 unsigned long long time_rmdirs;
794 unsigned long long time_renames;
795 unsigned long long time_t2renames;
796 unsigned long long time_ffirst;
797 unsigned long long time_fnext;
798 unsigned long long time_fclose;
799 #endif /* CONFIG_CIFS_STATS2 */
802 spinlock_t stat_lock;
803 #endif /* CONFIG_CIFS_STATS */
804 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
805 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
806 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
807 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
810 bool seal:1; /* transport encryption for this mounted share */
811 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
812 for this mount even if server would support */
813 bool local_lease:1; /* check leases (only) on local system not remote */
814 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
815 bool need_reconnect:1; /* connection reset, tid now invalid */
816 #ifdef CONFIG_CIFS_SMB2
817 bool print:1; /* set if connection to printer share */
818 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
821 __u32 maximal_access;
822 __u32 vol_serial_number;
823 __le64 vol_create_time;
824 #endif /* CONFIG_CIFS_SMB2 */
825 #ifdef CONFIG_CIFS_FSCACHE
826 u64 resource_id; /* server resource id */
827 struct fscache_cookie *fscache; /* cookie for share */
829 struct list_head pending_opens; /* list of incomplete opens */
830 /* BB add field for back pointer to sb struct(s)? */
834 * This is a refcounted and timestamped container for a tcon pointer. The
835 * container holds a tcon reference. It is considered safe to free one of
836 * these when the tl_count goes to 0. The tl_time is the time of the last
837 * "get" on the container.
840 struct rb_node tl_rbnode;
842 unsigned long tl_flags;
843 #define TCON_LINK_MASTER 0
844 #define TCON_LINK_PENDING 1
845 #define TCON_LINK_IN_TREE 2
846 unsigned long tl_time;
848 struct cifs_tcon *tl_tcon;
851 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
853 static inline struct cifs_tcon *
854 tlink_tcon(struct tcon_link *tlink)
856 return tlink->tl_tcon;
859 extern void cifs_put_tlink(struct tcon_link *tlink);
861 static inline struct tcon_link *
862 cifs_get_tlink(struct tcon_link *tlink)
864 if (tlink && !IS_ERR(tlink))
865 atomic_inc(&tlink->tl_count);
869 /* This function is always expected to succeed */
870 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
872 #define CIFS_OPLOCK_NO_CHANGE 0xfe
874 struct cifs_pending_open {
875 struct list_head olist;
876 struct tcon_link *tlink;
882 * This info hangs off the cifsFileInfo structure, pointed to by llist.
883 * This is used to track byte stream locks on the file
885 struct cifsLockInfo {
886 struct list_head llist; /* pointer to next cifsLockInfo */
887 struct list_head blist; /* pointer to locks blocked on this */
888 wait_queue_head_t block_q;
896 * One of these for each open instance of a file
898 struct cifs_search_info {
899 loff_t index_of_last_entry;
900 __u16 entries_in_buffer;
903 char *ntwrk_buf_start;
904 char *srch_entries_start;
906 const char *presume_name;
907 unsigned int resume_name_len;
911 bool smallBuf:1; /* so we know which buf_release function to call */
916 #ifdef CONFIG_CIFS_SMB2
917 __u64 persistent_fid; /* persist file id for smb2 */
918 __u64 volatile_fid; /* volatile file id for smb2 */
919 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
921 struct cifs_pending_open *pending_open;
924 struct cifs_fid_locks {
925 struct list_head llist;
926 struct cifsFileInfo *cfile; /* fid that owns locks */
927 struct list_head locks; /* locks held by fid above */
930 struct cifsFileInfo {
931 struct list_head tlist; /* pointer to next fid owned by tcon */
932 struct list_head flist; /* next fid (file instance) for this inode */
933 struct cifs_fid_locks *llist; /* brlocks held by this fid */
934 unsigned int uid; /* allows finding which FileInfo structure */
935 __u32 pid; /* process id who opened file */
936 struct cifs_fid fid; /* file id from remote */
937 /* BB add lock scope info here if needed */ ;
938 /* lock scope id (0 if none) */
939 struct dentry *dentry;
940 unsigned int f_flags;
941 struct tcon_link *tlink;
942 bool invalidHandle:1; /* file closed via session abend */
943 bool oplock_break_cancelled:1;
944 int count; /* refcount protected by cifs_file_list_lock */
945 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
946 struct cifs_search_info srch_inf;
947 struct work_struct oplock_break; /* work for oplock breaks */
950 struct cifs_io_parms {
952 #ifdef CONFIG_CIFS_SMB2
953 __u64 persistent_fid; /* persist file id for smb2 */
954 __u64 volatile_fid; /* volatile file id for smb2 */
959 struct cifs_tcon *tcon;
962 struct cifs_readdata;
964 /* asynchronous read support */
965 struct cifs_readdata {
966 struct kref refcount;
967 struct list_head list;
968 struct completion done;
969 struct cifsFileInfo *cfile;
970 struct address_space *mapping;
975 struct work_struct work;
976 int (*read_into_pages)(struct TCP_Server_Info *server,
977 struct cifs_readdata *rdata,
982 unsigned int nr_pages;
983 struct page *pages[];
986 struct cifs_writedata;
988 /* asynchronous write support */
989 struct cifs_writedata {
990 struct kref refcount;
991 struct list_head list;
992 struct completion done;
993 enum writeback_sync_modes sync_mode;
994 struct work_struct work;
995 struct cifsFileInfo *cfile;
1000 unsigned int pagesz;
1001 unsigned int tailsz;
1002 unsigned int nr_pages;
1003 struct page *pages[1];
1007 * Take a reference on the file private data. Must be called with
1008 * cifs_file_list_lock held.
1011 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1016 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1017 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1020 * One of these for each file inode
1023 struct cifsInodeInfo {
1024 bool can_cache_brlcks;
1025 struct list_head llist; /* locks helb by this inode */
1026 struct rw_semaphore lock_sem; /* protect the fields above */
1027 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1028 struct list_head openFileList;
1029 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1030 bool clientCanCacheRead; /* read oplock */
1031 bool clientCanCacheAll; /* read and writebehind oplock */
1032 bool delete_pending; /* DELETE_ON_CLOSE is set */
1033 bool invalid_mapping; /* pagecache is invalid */
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)
1081 for (i = 0; path[i] != '\0'; i++) {
1082 if (path[i] == old_delim)
1087 static inline char *
1088 build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
1089 struct cifs_tcon *tcon)
1091 if (!vol->ops->build_path_to_root)
1093 return vol->ops->build_path_to_root(vol, cifs_sb, tcon);
1096 #ifdef CONFIG_CIFS_STATS
1097 #define cifs_stats_inc atomic_inc
1099 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1103 spin_lock(&tcon->stat_lock);
1104 tcon->bytes_written += bytes;
1105 spin_unlock(&tcon->stat_lock);
1109 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1112 spin_lock(&tcon->stat_lock);
1113 tcon->bytes_read += bytes;
1114 spin_unlock(&tcon->stat_lock);
1118 #define cifs_stats_inc(field) do {} while (0)
1119 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1120 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1126 * This is the prototype for the mid receive function. This function is for
1127 * receiving the rest of the SMB frame, starting with the WordCount (which is
1128 * just after the MID in struct smb_hdr). Note:
1130 * - This will be called by cifsd, with no locks held.
1131 * - The mid will still be on the pending_mid_q.
1132 * - mid->resp_buf will point to the current buffer.
1134 * Returns zero on a successful receive, or an error. The receive state in
1135 * the TCP_Server_Info will also be updated.
1137 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1138 struct mid_q_entry *mid);
1141 * This is the prototype for the mid callback function. This is called once the
1142 * mid has been received off of the socket. When creating one, take special
1143 * care to avoid deadlocks. Things to bear in mind:
1145 * - it will be called by cifsd, with no locks held
1146 * - the mid will be removed from any lists
1148 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1150 /* one of these for every pending CIFS request to the server */
1151 struct mid_q_entry {
1152 struct list_head qhead; /* mids waiting on reply from this server */
1153 struct TCP_Server_Info *server; /* server corresponding to this mid */
1154 __u64 mid; /* multiplex id */
1155 __u32 pid; /* process id */
1156 __u32 sequence_number; /* for CIFS signing */
1157 unsigned long when_alloc; /* when mid was created */
1158 #ifdef CONFIG_CIFS_STATS2
1159 unsigned long when_sent; /* time when smb send finished */
1160 unsigned long when_received; /* when demux complete (taken off wire) */
1162 mid_receive_t *receive; /* call receive callback */
1163 mid_callback_t *callback; /* call completion callback */
1164 void *callback_data; /* general purpose pointer for callback */
1165 void *resp_buf; /* pointer to received SMB header */
1166 int mid_state; /* wish this were enum but can not pass to wait_event */
1167 __le16 command; /* smb command code */
1168 bool large_buf:1; /* if valid response, is pointer to large buf */
1169 bool multiRsp:1; /* multiple trans2 responses for one request */
1170 bool multiEnd:1; /* both received */
1173 /* Make code in transport.c a little cleaner by moving
1174 update of optional stats into function below */
1175 #ifdef CONFIG_CIFS_STATS2
1177 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1179 atomic_inc(&server->in_send);
1182 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1184 atomic_dec(&server->in_send);
1187 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1189 atomic_inc(&server->num_waiters);
1192 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1194 atomic_dec(&server->num_waiters);
1197 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1199 mid->when_sent = jiffies;
1202 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1205 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1209 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1213 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1217 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1222 /* for pending dnotify requests */
1223 struct dir_notify_req {
1224 struct list_head lhead;
1231 __u32 filter; /* CompletionFilter (for multishot) */
1236 struct dfs_info3_param {
1237 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1246 * common struct for holding inode info when searching for or updating an
1247 * inode with new info
1250 #define CIFS_FATTR_DFS_REFERRAL 0x1
1251 #define CIFS_FATTR_DELETE_PENDING 0x2
1252 #define CIFS_FATTR_NEED_REVAL 0x4
1253 #define CIFS_FATTR_INO_COLLISION 0x8
1266 unsigned int cf_nlink;
1267 unsigned int cf_dtype;
1268 struct timespec cf_atime;
1269 struct timespec cf_mtime;
1270 struct timespec cf_ctime;
1273 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1276 kfree(param->path_name);
1277 kfree(param->node_name);
1282 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1283 int number_of_items)
1286 if ((number_of_items == 0) || (param == NULL))
1288 for (i = 0; i < number_of_items; i++) {
1289 kfree(param[i].path_name);
1290 kfree(param[i].node_name);
1296 #define MID_REQUEST_ALLOCATED 1
1297 #define MID_REQUEST_SUBMITTED 2
1298 #define MID_RESPONSE_RECEIVED 4
1299 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1300 #define MID_RESPONSE_MALFORMED 0x10
1301 #define MID_SHUTDOWN 0x20
1303 /* Types of response buffer returned from SendReceive2 */
1304 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1305 #define CIFS_SMALL_BUFFER 1
1306 #define CIFS_LARGE_BUFFER 2
1307 #define CIFS_IOVEC 4 /* array of response buffers */
1309 /* Type of Request to SendReceive2 */
1310 #define CIFS_BLOCKING_OP 1 /* operation can block */
1311 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1312 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1313 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1314 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1315 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1317 /* Type of request operation */
1318 #define CIFS_ECHO_OP 0x080 /* echo request */
1319 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1320 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1321 #define CIFS_OP_MASK 0x0380 /* mask request type */
1323 /* Security Flags: indicate type of session setup needed */
1324 #define CIFSSEC_MAY_SIGN 0x00001
1325 #define CIFSSEC_MAY_NTLM 0x00002
1326 #define CIFSSEC_MAY_NTLMV2 0x00004
1327 #define CIFSSEC_MAY_KRB5 0x00008
1328 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1329 #define CIFSSEC_MAY_LANMAN 0x00010
1330 #define CIFSSEC_MAY_PLNTXT 0x00020
1332 #define CIFSSEC_MAY_LANMAN 0
1333 #define CIFSSEC_MAY_PLNTXT 0
1334 #endif /* weak passwords */
1335 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1336 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1338 #define CIFSSEC_MUST_SIGN 0x01001
1339 /* note that only one of the following can be set so the
1340 result of setting MUST flags more than once will be to
1341 require use of the stronger protocol */
1342 #define CIFSSEC_MUST_NTLM 0x02002
1343 #define CIFSSEC_MUST_NTLMV2 0x04004
1344 #define CIFSSEC_MUST_KRB5 0x08008
1345 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1346 #define CIFSSEC_MUST_LANMAN 0x10010
1347 #define CIFSSEC_MUST_PLNTXT 0x20020
1348 #ifdef CONFIG_CIFS_UPCALL
1349 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1351 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1353 #else /* do not allow weak pw hash */
1354 #define CIFSSEC_MUST_LANMAN 0
1355 #define CIFSSEC_MUST_PLNTXT 0
1356 #ifdef CONFIG_CIFS_UPCALL
1357 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1359 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1361 #endif /* WEAK_PW_HASH */
1362 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1363 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1365 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
1366 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1367 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1369 *****************************************************************
1370 * All constants go here
1371 *****************************************************************
1374 #define UID_HASH (16)
1377 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1378 * following to be declared.
1381 /****************************************************************************
1382 * Locking notes. All updates to global variables and lists should be
1383 * protected by spinlocks or semaphores.
1387 * GlobalMid_Lock protects:
1388 * list operations on pending_mid_q and oplockQ
1389 * updates to XID counters, multiplex id and SMB sequence numbers
1390 * cifs_file_list_lock protects:
1391 * list operations on tcp and SMB session lists and tCon lists
1392 * f_owner.lock protects certain per file struct operations
1393 * mapping->page_lock protects certain per page operations
1397 * sesSem operations on smb session
1398 * tconSem operations on tree connection
1399 * fh_sem file handle reconnection operations
1401 ****************************************************************************/
1403 #ifdef DECLARE_GLOBALS_HERE
1404 #define GLOBAL_EXTERN
1406 #define GLOBAL_EXTERN extern
1410 * the list of TCP_Server_Info structures, ie each of the sockets
1411 * connecting our client to a distinct server (ip address), is
1412 * chained together by cifs_tcp_ses_list. The list of all our SMB
1413 * sessions (and from that the tree connections) can be found
1414 * by iterating over cifs_tcp_ses_list
1416 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1419 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1420 * tcp session, and the list of tcon's per smb session. It also protects
1421 * the reference counters for the server, smb session, and tcon. Finally,
1422 * changes to the tcon->tidStatus should be done while holding this lock.
1424 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1427 * This lock protects the cifs_file->llist and cifs_file->flist
1428 * list operations, and updates to some flags (cifs_file->invalidHandle)
1429 * It will be moved to either use the tcon->stat_lock or equivalent later.
1430 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1431 * the cifs_tcp_ses_lock must be grabbed first and released last.
1433 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1435 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1436 /* Outstanding dir notify requests */
1437 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1438 /* DirNotify response queue */
1439 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1440 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1443 * Global transaction id (XID) information
1445 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1446 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1447 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1448 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1449 /* on midQ entries */
1451 * Global counters, updated atomically
1453 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1454 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1455 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1456 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1457 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1459 /* Various Debug counters */
1460 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1461 #ifdef CONFIG_CIFS_STATS2
1462 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1463 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1465 GLOBAL_EXTERN atomic_t smBufAllocCount;
1466 GLOBAL_EXTERN atomic_t midCount;
1469 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1470 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1471 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1472 with more secure ntlmssp2 challenge/resp */
1473 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1474 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1475 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1476 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1477 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1478 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1480 #ifdef CONFIG_CIFS_ACL
1481 GLOBAL_EXTERN struct rb_root uidtree;
1482 GLOBAL_EXTERN struct rb_root gidtree;
1483 GLOBAL_EXTERN spinlock_t siduidlock;
1484 GLOBAL_EXTERN spinlock_t sidgidlock;
1485 GLOBAL_EXTERN struct rb_root siduidtree;
1486 GLOBAL_EXTERN struct rb_root sidgidtree;
1487 GLOBAL_EXTERN spinlock_t uidsidlock;
1488 GLOBAL_EXTERN spinlock_t gidsidlock;
1489 #endif /* CONFIG_CIFS_ACL */
1491 void cifs_oplock_break(struct work_struct *work);
1493 extern const struct slow_work_ops cifs_oplock_break_ops;
1494 extern struct workqueue_struct *cifsiod_wq;
1496 extern mempool_t *cifs_mid_poolp;
1498 /* Operations for different SMB versions */
1499 #define SMB1_VERSION_STRING "1.0"
1500 extern struct smb_version_operations smb1_operations;
1501 extern struct smb_version_values smb1_values;
1502 #define SMB20_VERSION_STRING "2.0"
1503 /*extern struct smb_version_operations smb20_operations; */ /* not needed yet */
1504 extern struct smb_version_values smb20_values;
1505 #define SMB21_VERSION_STRING "2.1"
1506 extern struct smb_version_operations smb21_operations;
1507 extern struct smb_version_values smb21_values;
1508 #define SMB30_VERSION_STRING "3.0"
1509 /*extern struct smb_version_operations smb30_operations; */ /* not needed yet */
1510 extern struct smb_version_values smb30_values;
1511 #endif /* _CIFS_GLOB_H */