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 CIFS_MAX_DOMAINNAME_LEN 256 /* max domain name length */
48 #define MAX_USERNAME_SIZE 256 /* reasonable maximum for current servers */
49 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
51 #define CIFS_MIN_RCV_POOL 4
53 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
55 * default attribute cache timeout (jiffies)
57 #define CIFS_DEF_ACTIMEO (1 * HZ)
60 * max attribute cache timeout (jiffies) - 2^30
62 #define CIFS_MAX_ACTIMEO (1 << 30)
65 * MAX_REQ is the maximum number of requests that WE will send
66 * on one socket concurrently.
68 #define CIFS_MAX_REQ 32767
70 #define RFC1001_NAME_LEN 15
71 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
73 /* currently length of NIP6_FMT */
74 #define SERVER_NAME_LENGTH 40
75 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
77 /* used to define string lengths for reversing unicode strings */
79 /* (max path length + 1 for null) * 2 for unicode */
82 /* SMB echo "timeout" -- FIXME: tunable? */
83 #define SMB_ECHO_INTERVAL (60 * HZ)
87 #ifndef XATTR_DOS_ATTRIB
88 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
92 * CIFS vfs client Status information (based on what we know.)
95 /* associated with each tcp and smb session */
105 LANMAN = 0, /* Legacy LANMAN auth */
106 NTLM, /* Legacy NTLM012 auth with NTLM hash */
107 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
108 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
109 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
110 Kerberos, /* Kerberos via SPNEGO */
116 /* Netbios frames protocol not supported at this time */
124 /* crypto security descriptor definition */
126 struct shash_desc shash;
130 /* crypto hashing related structure/fields, not specific to a sec mech */
131 struct cifs_secmech {
132 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
133 struct crypto_shash *md5; /* md5 hash function */
134 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
135 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
136 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
137 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
140 /* per smb session structure/fields */
141 struct ntlmssp_auth {
142 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
143 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
144 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
145 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
153 struct cifs_sid osid;
154 struct cifs_sid gsid;
155 struct cifs_ntace *ntaces;
156 struct cifs_ace *aces;
160 *****************************************************************
161 * Except the CIFS PDUs themselves all the
162 * globally interesting structs should go here
163 *****************************************************************
167 * A smb_rqst represents a complete request to be issued to a server. It's
168 * formed by a kvec array, followed by an array of pages. Page data is assumed
169 * to start at the beginning of the first page.
172 struct kvec *rq_iov; /* array of kvecs */
173 unsigned int rq_nvec; /* number of kvecs in array */
174 struct page **rq_pages; /* pointer to array of page ptrs */
175 unsigned int rq_npages; /* number pages in array */
176 unsigned int rq_pagesz; /* page size to use */
177 unsigned int rq_tailsz; /* length of last page */
188 struct TCP_Server_Info;
192 struct dfs_info3_param;
196 struct cifs_readdata;
197 struct cifs_writedata;
198 struct cifs_io_parms;
199 struct cifs_search_info;
200 struct cifsInodeInfo;
202 struct smb_version_operations {
203 int (*send_cancel)(struct TCP_Server_Info *, void *,
204 struct mid_q_entry *);
205 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
206 /* setup request: allocate mid, sign message */
207 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
209 /* setup async request: allocate mid, sign message */
210 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
212 /* check response: verify signature, map error */
213 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
215 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
217 void (*set_credits)(struct TCP_Server_Info *, const int);
218 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
219 unsigned int (*get_credits)(struct mid_q_entry *);
220 __u64 (*get_next_mid)(struct TCP_Server_Info *);
221 /* data offset from read response message */
222 unsigned int (*read_data_offset)(char *);
223 /* data length from read response message */
224 unsigned int (*read_data_length)(char *);
225 /* map smb to linux error */
226 int (*map_error)(char *, bool);
227 /* find mid corresponding to the response message */
228 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
229 void (*dump_detail)(void *);
230 void (*clear_stats)(struct cifs_tcon *);
231 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
232 /* verify the message */
233 int (*check_message)(char *, unsigned int);
234 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
235 /* process transaction2 response */
236 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
238 /* check if we need to negotiate */
239 bool (*need_neg)(struct TCP_Server_Info *);
240 /* negotiate to the server */
241 int (*negotiate)(const unsigned int, struct cifs_ses *);
242 /* set negotiated write size */
243 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
244 /* set negotiated read size */
245 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
246 /* setup smb sessionn */
247 int (*sess_setup)(const unsigned int, struct cifs_ses *,
248 const struct nls_table *);
249 /* close smb session */
250 int (*logoff)(const unsigned int, struct cifs_ses *);
251 /* connect to a server share */
252 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
253 struct cifs_tcon *, const struct nls_table *);
254 /* close tree connecion */
255 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
256 /* get DFS referrals */
257 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
258 const char *, struct dfs_info3_param **,
259 unsigned int *, const struct nls_table *, int);
260 /* informational QFS call */
261 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
262 /* check if a path is accessible or not */
263 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
264 struct cifs_sb_info *, const char *);
265 /* query path data from the server */
266 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
267 struct cifs_sb_info *, const char *,
268 FILE_ALL_INFO *, bool *);
269 /* query file data from the server */
270 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
271 struct cifs_fid *, FILE_ALL_INFO *);
272 /* get server index number */
273 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
274 struct cifs_sb_info *, const char *,
275 u64 *uniqueid, FILE_ALL_INFO *);
276 /* set size by path */
277 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
278 const char *, __u64, struct cifs_sb_info *, bool);
279 /* set size by file handle */
280 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
281 struct cifsFileInfo *, __u64, bool);
283 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
285 /* check if we can send an echo or nor */
286 bool (*can_echo)(struct TCP_Server_Info *);
287 /* send echo request */
288 int (*echo)(struct TCP_Server_Info *);
289 /* create directory */
290 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
291 struct cifs_sb_info *);
292 /* set info on created directory */
293 void (*mkdir_setinfo)(struct inode *, const char *,
294 struct cifs_sb_info *, struct cifs_tcon *,
296 /* remove directory */
297 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
298 struct cifs_sb_info *);
300 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
301 struct cifs_sb_info *);
302 /* open, rename and delete file */
303 int (*rename_pending_delete)(const char *, struct dentry *,
305 /* send rename request */
306 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
307 const char *, struct cifs_sb_info *);
308 /* send create hardlink request */
309 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
310 const char *, const char *,
311 struct cifs_sb_info *);
312 /* open a file for non-posix mounts */
313 int (*open)(const unsigned int, struct cifs_tcon *, const char *, int,
314 int, int, struct cifs_fid *, __u32 *, FILE_ALL_INFO *,
315 struct cifs_sb_info *);
316 /* set fid protocol-specific info */
317 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
319 void (*close)(const unsigned int, struct cifs_tcon *,
321 /* send a flush request to the server */
322 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
323 /* async read from the server */
324 int (*async_readv)(struct cifs_readdata *);
325 /* async write to the server */
326 int (*async_writev)(struct cifs_writedata *);
327 /* sync read from the server */
328 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
329 struct cifs_io_parms *, unsigned int *, char **,
331 /* sync write to the server */
332 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
333 struct cifs_io_parms *, unsigned int *, struct kvec *,
335 /* open dir, start readdir */
336 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
337 const char *, struct cifs_sb_info *,
338 struct cifs_fid *, __u16,
339 struct cifs_search_info *);
340 /* continue readdir */
341 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
343 __u16, struct cifs_search_info *srch_inf);
345 int (*close_dir)(const unsigned int, struct cifs_tcon *,
347 /* calculate a size of SMB message */
348 unsigned int (*calc_smb_size)(void *);
349 /* check for STATUS_PENDING and process it in a positive case */
350 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
351 /* send oplock break response */
352 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
353 struct cifsInodeInfo *);
354 /* query remote filesystem */
355 int (*queryfs)(const unsigned int, struct cifs_tcon *,
357 /* send mandatory brlock to the server */
358 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
359 __u64, __u32, int, int, bool);
360 /* unlock range of mandatory locks */
361 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
363 /* push brlocks from the cache to the server */
364 int (*push_mand_locks)(struct cifsFileInfo *);
365 /* get lease key of the inode */
366 void (*get_lease_key)(struct inode *, struct cifs_fid *fid);
367 /* set lease key of the inode */
368 void (*set_lease_key)(struct inode *, struct cifs_fid *fid);
369 /* generate new lease key */
370 void (*new_lease_key)(struct cifs_fid *fid);
371 int (*calc_signature)(struct smb_rqst *rqst,
372 struct TCP_Server_Info *server);
373 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
374 const unsigned char *, const unsigned char *, char *,
375 size_t, const struct nls_table *, int);
376 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
377 const char *, const void *, const __u16,
378 const struct nls_table *, int);
379 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
380 const char *, u32 *);
381 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
385 struct smb_version_values {
386 char *version_string;
388 __u32 req_capabilities;
389 __u32 large_lock_type;
390 __u32 exclusive_lock_type;
391 __u32 shared_lock_type;
392 __u32 unlock_lock_type;
394 size_t max_header_size;
395 size_t read_rsp_size;
397 unsigned int cap_unix;
398 unsigned int cap_nt_find;
399 unsigned int cap_large_files;
400 unsigned int oplock_read;
403 #define HEADER_SIZE(server) (server->vals->header_size)
404 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
411 char *iocharset; /* local code page for mapping to and from Unicode */
412 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
413 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
429 bool no_psx_acl:1; /* set if posix acl support should be disabled */
431 bool backupuid_specified; /* mount option backupuid is specified */
432 bool backupgid_specified; /* mount option backupgid is specified */
433 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
434 bool server_ino:1; /* use inode numbers from server ie UniqueId */
436 bool strict_io:1; /* strict cache behavior */
437 bool remap:1; /* set to remap seven reserved chars in filenames */
438 bool posix_paths:1; /* unset to not ask for posix pathnames. */
441 bool nullauth:1; /* attempt to authenticate with null user */
442 bool nocase:1; /* request case insensitive filenames */
443 bool nobrl:1; /* disable sending byte range locks to srv */
444 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
445 bool seal:1; /* request transport encryption on share */
446 bool nodfs:1; /* Do not request DFS, even if available */
447 bool local_lease:1; /* check leases only on local system, not remote */
450 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
451 bool fsc:1; /* enable fscache */
452 bool mfsymlinks:1; /* use Minshall+French Symlinks */
454 bool rwpidforward:1; /* pid forward for read/write operations */
457 bool sockopt_tcp_nodelay:1;
458 unsigned long actimeo; /* attribute cache timeout (jiffies) */
459 struct smb_version_operations *ops;
460 struct smb_version_values *vals;
462 struct sockaddr_storage dstaddr; /* destination address */
463 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
464 struct nls_table *local_nls;
467 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
468 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
469 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
470 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
471 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
472 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
473 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
474 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
475 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
476 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
478 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
479 MS_NODEV | MS_SYNCHRONOUS)
481 struct cifs_mnt_data {
482 struct cifs_sb_info *cifs_sb;
487 static inline unsigned int
488 get_rfc1002_length(void *buf)
490 return be32_to_cpu(*((__be32 *)buf));
494 inc_rfc1001_len(void *buf, int count)
496 be32_add_cpu((__be32 *)buf, count);
499 struct TCP_Server_Info {
500 struct list_head tcp_ses_list;
501 struct list_head smb_ses_list;
502 int srv_count; /* reference counter */
503 /* 15 character server name + 0x20 16th byte indicating type = srv */
504 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
505 struct smb_version_operations *ops;
506 struct smb_version_values *vals;
507 enum statusEnum tcpStatus; /* what we think the status is */
508 char *hostname; /* hostname portion of UNC string */
509 struct socket *ssocket;
510 struct sockaddr_storage dstaddr;
511 struct sockaddr_storage srcaddr; /* locally bind to this IP */
515 wait_queue_head_t response_q;
516 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
517 struct list_head pending_mid_q;
518 bool noblocksnd; /* use blocking sendmsg */
519 bool noautotune; /* do not autotune send buf sizes */
521 int credits; /* send no more requests at once */
522 unsigned int in_flight; /* number of requests on the wire to server */
523 spinlock_t req_lock; /* protect the two values above */
524 struct mutex srv_mutex;
525 struct task_struct *tsk;
526 char server_GUID[16];
528 bool session_estab; /* mark when very first sess is established */
529 #ifdef CONFIG_CIFS_SMB2
530 int echo_credits; /* echo reserved slots */
531 int oplock_credits; /* oplock break reserved slots */
532 bool echoes:1; /* enable echoes */
534 u16 dialect; /* dialect index that server chose */
535 enum securityEnum secType;
536 bool oplocks:1; /* enable oplocks */
537 unsigned int maxReq; /* Clients should submit no more */
538 /* than maxReq distinct unanswered SMBs to the server when using */
539 /* multiplexed reads or writes */
540 unsigned int maxBuf; /* maxBuf specifies the maximum */
541 /* message size the server can send or receive for non-raw SMBs */
542 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
543 /* when socket is setup (and during reconnect) before NegProt sent */
544 unsigned int max_rw; /* maxRw specifies the maximum */
545 /* message size the server can send or receive for */
546 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
547 unsigned int max_vcs; /* maximum number of smb sessions, at least
548 those that can be specified uniquely with
550 unsigned int capabilities; /* selective disabling of caps by smb sess */
551 int timeAdj; /* Adjust for difference in server time zone in sec */
552 __u64 CurrentMid; /* multiplex id - rotating counter */
553 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
554 /* 16th byte of RFC1001 workstation name is always null */
555 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
556 __u32 sequence_number; /* for signing, protected by srv_mutex */
557 struct session_key session_key;
558 unsigned long lstrp; /* when we got last response from this server */
559 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
560 /* extended security flavors that server supports */
561 bool sec_ntlmssp; /* supports NTLMSSP */
562 bool sec_kerberosu2u; /* supports U2U Kerberos */
563 bool sec_kerberos; /* supports plain Kerberos */
564 bool sec_mskerberos; /* supports legacy MS Kerberos */
565 bool large_buf; /* is current buffer large? */
566 struct delayed_work echo; /* echo ping workqueue job */
567 struct kvec *iov; /* reusable kvec array for receives */
568 unsigned int nr_iov; /* number of kvecs in array */
569 char *smallbuf; /* pointer to current "small" buffer */
570 char *bigbuf; /* pointer to current "big" buffer */
571 unsigned int total_read; /* total amount of data read in this pass */
572 #ifdef CONFIG_CIFS_FSCACHE
573 struct fscache_cookie *fscache; /* client index cache cookie */
575 #ifdef CONFIG_CIFS_STATS2
576 atomic_t in_send; /* requests trying to send */
577 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
579 #ifdef CONFIG_CIFS_SMB2
580 unsigned int max_read;
581 unsigned int max_write;
582 #endif /* CONFIG_CIFS_SMB2 */
585 static inline unsigned int
586 in_flight(struct TCP_Server_Info *server)
589 spin_lock(&server->req_lock);
590 num = server->in_flight;
591 spin_unlock(&server->req_lock);
596 has_credits(struct TCP_Server_Info *server, int *credits)
599 spin_lock(&server->req_lock);
601 spin_unlock(&server->req_lock);
606 add_credits(struct TCP_Server_Info *server, const unsigned int add,
609 server->ops->add_credits(server, add, optype);
613 set_credits(struct TCP_Server_Info *server, const int val)
615 server->ops->set_credits(server, val);
619 get_next_mid(struct TCP_Server_Info *server)
621 return server->ops->get_next_mid(server);
625 * When the server supports very large reads and writes via POSIX extensions,
626 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
627 * including the RFC1001 length.
629 * Note that this might make for "interesting" allocation problems during
630 * writeback however as we have to allocate an array of pointers for the
631 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
633 * For reads, there is a similar problem as we need to allocate an array
634 * of kvecs to handle the receive, though that should only need to be done
637 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
638 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
641 * When the server doesn't allow large posix writes, only allow a rsize/wsize
642 * of 2^17-1 minus the size of the call header. That allows for a read or
643 * write up to the maximum size described by RFC1002.
645 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
646 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
649 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
650 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
651 * a single wsize request with a single call.
653 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
656 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
657 * those values when posix extensions aren't in force. In actuality here, we
658 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
659 * to be ok with the extra byte even though Windows doesn't send writes that
664 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
666 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
667 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
670 * Macros to allow the TCP_Server_Info->net field and related code to drop out
671 * when CONFIG_NET_NS isn't set.
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 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
693 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
700 * Session structure. One of these for each uid session with a particular host
703 struct list_head smb_ses_list;
704 struct list_head tcon_list;
705 struct mutex session_mutex;
706 struct TCP_Server_Info *server; /* pointer to server info */
707 int ses_count; /* reference counter */
708 enum statusEnum status;
709 unsigned overrideSecFlg; /* if non-zero override global sec flags */
710 __u16 ipc_tid; /* special tid for connection to IPC share */
713 char *serverOS; /* name of operating system underlying server */
714 char *serverNOS; /* name of network operating system of server */
715 char *serverDomain; /* security realm of server */
716 __u64 Suid; /* remote smb uid */
717 kuid_t linux_uid; /* overriding owner of files on the mount */
718 kuid_t cred_uid; /* owner of credentials */
719 unsigned int capabilities;
720 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
721 TCP names - will ipv6 and sctp addresses fit? */
722 char *user_name; /* must not be null except during init of sess
723 and after mount option parsing we fill it */
726 struct session_key auth_key;
727 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
728 bool need_reconnect:1; /* connection reset, uid now invalid */
729 #ifdef CONFIG_CIFS_SMB2
731 #endif /* CONFIG_CIFS_SMB2 */
734 /* no more than one of the following three session flags may be set */
735 #define CIFS_SES_NT4 1
736 #define CIFS_SES_OS2 2
737 #define CIFS_SES_W9X 4
738 /* following flag is set for old servers such as OS2 (and Win95?)
739 which do not negotiate NTLM or POSIX dialects, but instead
740 negotiate one of the older LANMAN dialects */
741 #define CIFS_SES_LANMAN 8
744 cap_unix(struct cifs_ses *ses)
746 return ses->server->vals->cap_unix & ses->capabilities;
750 * there is one of these for each connection to a resource on a particular
754 struct list_head tcon_list;
756 struct list_head openFileList;
757 struct cifs_ses *ses; /* pointer to session associated with */
758 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
759 char *nativeFileSystem;
760 char *password; /* for share-level security */
761 __u32 tid; /* The 4 byte tree id */
762 __u16 Flags; /* optional support bits */
763 enum statusEnum tidStatus;
764 #ifdef CONFIG_CIFS_STATS
765 atomic_t num_smbs_sent;
770 atomic_t num_flushes;
771 atomic_t num_oplock_brks;
774 atomic_t num_deletes;
776 atomic_t num_posixopens;
777 atomic_t num_posixmkdirs;
779 atomic_t num_renames;
780 atomic_t num_t2renames;
784 atomic_t num_hardlinks;
785 atomic_t num_symlinks;
787 atomic_t num_acl_get;
788 atomic_t num_acl_set;
790 #ifdef CONFIG_CIFS_SMB2
792 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
793 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
795 #endif /* CONFIG_CIFS_SMB2 */
797 #ifdef CONFIG_CIFS_STATS2
798 unsigned long long time_writes;
799 unsigned long long time_reads;
800 unsigned long long time_opens;
801 unsigned long long time_deletes;
802 unsigned long long time_closes;
803 unsigned long long time_mkdirs;
804 unsigned long long time_rmdirs;
805 unsigned long long time_renames;
806 unsigned long long time_t2renames;
807 unsigned long long time_ffirst;
808 unsigned long long time_fnext;
809 unsigned long long time_fclose;
810 #endif /* CONFIG_CIFS_STATS2 */
813 spinlock_t stat_lock;
814 #endif /* CONFIG_CIFS_STATS */
815 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
816 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
817 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
818 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
821 bool seal:1; /* transport encryption for this mounted share */
822 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
823 for this mount even if server would support */
824 bool local_lease:1; /* check leases (only) on local system not remote */
825 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
826 bool need_reconnect:1; /* connection reset, tid now invalid */
827 #ifdef CONFIG_CIFS_SMB2
828 bool print:1; /* set if connection to printer share */
829 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
832 __u32 maximal_access;
833 __u32 vol_serial_number;
834 __le64 vol_create_time;
835 #endif /* CONFIG_CIFS_SMB2 */
836 #ifdef CONFIG_CIFS_FSCACHE
837 u64 resource_id; /* server resource id */
838 struct fscache_cookie *fscache; /* cookie for share */
840 struct list_head pending_opens; /* list of incomplete opens */
841 /* BB add field for back pointer to sb struct(s)? */
845 * This is a refcounted and timestamped container for a tcon pointer. The
846 * container holds a tcon reference. It is considered safe to free one of
847 * these when the tl_count goes to 0. The tl_time is the time of the last
848 * "get" on the container.
851 struct rb_node tl_rbnode;
853 unsigned long tl_flags;
854 #define TCON_LINK_MASTER 0
855 #define TCON_LINK_PENDING 1
856 #define TCON_LINK_IN_TREE 2
857 unsigned long tl_time;
859 struct cifs_tcon *tl_tcon;
862 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
864 static inline struct cifs_tcon *
865 tlink_tcon(struct tcon_link *tlink)
867 return tlink->tl_tcon;
870 extern void cifs_put_tlink(struct tcon_link *tlink);
872 static inline struct tcon_link *
873 cifs_get_tlink(struct tcon_link *tlink)
875 if (tlink && !IS_ERR(tlink))
876 atomic_inc(&tlink->tl_count);
880 /* This function is always expected to succeed */
881 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
883 #define CIFS_OPLOCK_NO_CHANGE 0xfe
885 struct cifs_pending_open {
886 struct list_head olist;
887 struct tcon_link *tlink;
893 * This info hangs off the cifsFileInfo structure, pointed to by llist.
894 * This is used to track byte stream locks on the file
896 struct cifsLockInfo {
897 struct list_head llist; /* pointer to next cifsLockInfo */
898 struct list_head blist; /* pointer to locks blocked on this */
899 wait_queue_head_t block_q;
907 * One of these for each open instance of a file
909 struct cifs_search_info {
910 loff_t index_of_last_entry;
911 __u16 entries_in_buffer;
914 char *ntwrk_buf_start;
915 char *srch_entries_start;
917 const char *presume_name;
918 unsigned int resume_name_len;
922 bool smallBuf:1; /* so we know which buf_release function to call */
927 #ifdef CONFIG_CIFS_SMB2
928 __u64 persistent_fid; /* persist file id for smb2 */
929 __u64 volatile_fid; /* volatile file id for smb2 */
930 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
932 struct cifs_pending_open *pending_open;
935 struct cifs_fid_locks {
936 struct list_head llist;
937 struct cifsFileInfo *cfile; /* fid that owns locks */
938 struct list_head locks; /* locks held by fid above */
941 struct cifsFileInfo {
942 struct list_head tlist; /* pointer to next fid owned by tcon */
943 struct list_head flist; /* next fid (file instance) for this inode */
944 struct cifs_fid_locks *llist; /* brlocks held by this fid */
945 kuid_t uid; /* allows finding which FileInfo structure */
946 __u32 pid; /* process id who opened file */
947 struct cifs_fid fid; /* file id from remote */
948 /* BB add lock scope info here if needed */ ;
949 /* lock scope id (0 if none) */
950 struct dentry *dentry;
951 unsigned int f_flags;
952 struct tcon_link *tlink;
953 bool invalidHandle:1; /* file closed via session abend */
954 bool oplock_break_cancelled:1;
955 int count; /* refcount protected by cifs_file_list_lock */
956 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
957 struct cifs_search_info srch_inf;
958 struct work_struct oplock_break; /* work for oplock breaks */
961 struct cifs_io_parms {
963 #ifdef CONFIG_CIFS_SMB2
964 __u64 persistent_fid; /* persist file id for smb2 */
965 __u64 volatile_fid; /* volatile file id for smb2 */
970 struct cifs_tcon *tcon;
973 struct cifs_readdata;
975 /* asynchronous read support */
976 struct cifs_readdata {
977 struct kref refcount;
978 struct list_head list;
979 struct completion done;
980 struct cifsFileInfo *cfile;
981 struct address_space *mapping;
986 struct work_struct work;
987 int (*read_into_pages)(struct TCP_Server_Info *server,
988 struct cifs_readdata *rdata,
993 unsigned int nr_pages;
994 struct page *pages[];
997 struct cifs_writedata;
999 /* asynchronous write support */
1000 struct cifs_writedata {
1001 struct kref refcount;
1002 struct list_head list;
1003 struct completion done;
1004 enum writeback_sync_modes sync_mode;
1005 struct work_struct work;
1006 struct cifsFileInfo *cfile;
1011 unsigned int pagesz;
1012 unsigned int tailsz;
1013 unsigned int nr_pages;
1014 struct page *pages[1];
1018 * Take a reference on the file private data. Must be called with
1019 * cifs_file_list_lock held.
1022 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1027 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1028 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1031 * One of these for each file inode
1034 struct cifsInodeInfo {
1035 bool can_cache_brlcks;
1036 struct list_head llist; /* locks helb by this inode */
1037 struct rw_semaphore lock_sem; /* protect the fields above */
1038 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1039 struct list_head openFileList;
1040 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1041 bool clientCanCacheRead; /* read oplock */
1042 bool clientCanCacheAll; /* read and writebehind oplock */
1043 bool delete_pending; /* DELETE_ON_CLOSE is set */
1044 bool invalid_mapping; /* pagecache is invalid */
1045 unsigned long time; /* jiffies of last update of inode */
1046 u64 server_eof; /* current file size on server -- protected by i_lock */
1047 u64 uniqueid; /* server inode number */
1048 u64 createtime; /* creation time on server */
1049 #ifdef CONFIG_CIFS_SMB2
1050 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1052 #ifdef CONFIG_CIFS_FSCACHE
1053 struct fscache_cookie *fscache;
1055 struct inode vfs_inode;
1058 static inline struct cifsInodeInfo *
1059 CIFS_I(struct inode *inode)
1061 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1064 static inline struct cifs_sb_info *
1065 CIFS_SB(struct super_block *sb)
1067 return sb->s_fs_info;
1070 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1072 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1079 convert_delimiter(char *path, char delim)
1081 char old_delim, *pos;
1089 while ((pos = strchr(pos, old_delim)))
1093 #ifdef CONFIG_CIFS_STATS
1094 #define cifs_stats_inc atomic_inc
1096 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1100 spin_lock(&tcon->stat_lock);
1101 tcon->bytes_written += bytes;
1102 spin_unlock(&tcon->stat_lock);
1106 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1109 spin_lock(&tcon->stat_lock);
1110 tcon->bytes_read += bytes;
1111 spin_unlock(&tcon->stat_lock);
1115 #define cifs_stats_inc(field) do {} while (0)
1116 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1117 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1123 * This is the prototype for the mid receive function. This function is for
1124 * receiving the rest of the SMB frame, starting with the WordCount (which is
1125 * just after the MID in struct smb_hdr). Note:
1127 * - This will be called by cifsd, with no locks held.
1128 * - The mid will still be on the pending_mid_q.
1129 * - mid->resp_buf will point to the current buffer.
1131 * Returns zero on a successful receive, or an error. The receive state in
1132 * the TCP_Server_Info will also be updated.
1134 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1135 struct mid_q_entry *mid);
1138 * This is the prototype for the mid callback function. This is called once the
1139 * mid has been received off of the socket. When creating one, take special
1140 * care to avoid deadlocks. Things to bear in mind:
1142 * - it will be called by cifsd, with no locks held
1143 * - the mid will be removed from any lists
1145 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1147 /* one of these for every pending CIFS request to the server */
1148 struct mid_q_entry {
1149 struct list_head qhead; /* mids waiting on reply from this server */
1150 struct TCP_Server_Info *server; /* server corresponding to this mid */
1151 __u64 mid; /* multiplex id */
1152 __u32 pid; /* process id */
1153 __u32 sequence_number; /* for CIFS signing */
1154 unsigned long when_alloc; /* when mid was created */
1155 #ifdef CONFIG_CIFS_STATS2
1156 unsigned long when_sent; /* time when smb send finished */
1157 unsigned long when_received; /* when demux complete (taken off wire) */
1159 mid_receive_t *receive; /* call receive callback */
1160 mid_callback_t *callback; /* call completion callback */
1161 void *callback_data; /* general purpose pointer for callback */
1162 void *resp_buf; /* pointer to received SMB header */
1163 int mid_state; /* wish this were enum but can not pass to wait_event */
1164 __le16 command; /* smb command code */
1165 bool large_buf:1; /* if valid response, is pointer to large buf */
1166 bool multiRsp:1; /* multiple trans2 responses for one request */
1167 bool multiEnd:1; /* both received */
1170 /* Make code in transport.c a little cleaner by moving
1171 update of optional stats into function below */
1172 #ifdef CONFIG_CIFS_STATS2
1174 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1176 atomic_inc(&server->in_send);
1179 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1181 atomic_dec(&server->in_send);
1184 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1186 atomic_inc(&server->num_waiters);
1189 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1191 atomic_dec(&server->num_waiters);
1194 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1196 mid->when_sent = jiffies;
1199 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1202 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1206 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1210 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1214 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1219 /* for pending dnotify requests */
1220 struct dir_notify_req {
1221 struct list_head lhead;
1228 __u32 filter; /* CompletionFilter (for multishot) */
1233 struct dfs_info3_param {
1234 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1243 * common struct for holding inode info when searching for or updating an
1244 * inode with new info
1247 #define CIFS_FATTR_DFS_REFERRAL 0x1
1248 #define CIFS_FATTR_DELETE_PENDING 0x2
1249 #define CIFS_FATTR_NEED_REVAL 0x4
1250 #define CIFS_FATTR_INO_COLLISION 0x8
1263 unsigned int cf_nlink;
1264 unsigned int cf_dtype;
1265 struct timespec cf_atime;
1266 struct timespec cf_mtime;
1267 struct timespec cf_ctime;
1270 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1273 kfree(param->path_name);
1274 kfree(param->node_name);
1279 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1280 int number_of_items)
1283 if ((number_of_items == 0) || (param == NULL))
1285 for (i = 0; i < number_of_items; i++) {
1286 kfree(param[i].path_name);
1287 kfree(param[i].node_name);
1293 #define MID_REQUEST_ALLOCATED 1
1294 #define MID_REQUEST_SUBMITTED 2
1295 #define MID_RESPONSE_RECEIVED 4
1296 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1297 #define MID_RESPONSE_MALFORMED 0x10
1298 #define MID_SHUTDOWN 0x20
1300 /* Types of response buffer returned from SendReceive2 */
1301 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1302 #define CIFS_SMALL_BUFFER 1
1303 #define CIFS_LARGE_BUFFER 2
1304 #define CIFS_IOVEC 4 /* array of response buffers */
1306 /* Type of Request to SendReceive2 */
1307 #define CIFS_BLOCKING_OP 1 /* operation can block */
1308 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1309 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1310 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1311 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1312 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1314 /* Type of request operation */
1315 #define CIFS_ECHO_OP 0x080 /* echo request */
1316 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1317 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1318 #define CIFS_OP_MASK 0x0380 /* mask request type */
1320 /* Security Flags: indicate type of session setup needed */
1321 #define CIFSSEC_MAY_SIGN 0x00001
1322 #define CIFSSEC_MAY_NTLM 0x00002
1323 #define CIFSSEC_MAY_NTLMV2 0x00004
1324 #define CIFSSEC_MAY_KRB5 0x00008
1325 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1326 #define CIFSSEC_MAY_LANMAN 0x00010
1327 #define CIFSSEC_MAY_PLNTXT 0x00020
1329 #define CIFSSEC_MAY_LANMAN 0
1330 #define CIFSSEC_MAY_PLNTXT 0
1331 #endif /* weak passwords */
1332 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1333 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1335 #define CIFSSEC_MUST_SIGN 0x01001
1336 /* note that only one of the following can be set so the
1337 result of setting MUST flags more than once will be to
1338 require use of the stronger protocol */
1339 #define CIFSSEC_MUST_NTLM 0x02002
1340 #define CIFSSEC_MUST_NTLMV2 0x04004
1341 #define CIFSSEC_MUST_KRB5 0x08008
1342 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1343 #define CIFSSEC_MUST_LANMAN 0x10010
1344 #define CIFSSEC_MUST_PLNTXT 0x20020
1345 #ifdef CONFIG_CIFS_UPCALL
1346 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1348 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1350 #else /* do not allow weak pw hash */
1351 #define CIFSSEC_MUST_LANMAN 0
1352 #define CIFSSEC_MUST_PLNTXT 0
1353 #ifdef CONFIG_CIFS_UPCALL
1354 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1356 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1358 #endif /* WEAK_PW_HASH */
1359 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1360 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1362 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMSSP)
1363 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1364 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1366 *****************************************************************
1367 * All constants go here
1368 *****************************************************************
1371 #define UID_HASH (16)
1374 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1375 * following to be declared.
1378 /****************************************************************************
1379 * Locking notes. All updates to global variables and lists should be
1380 * protected by spinlocks or semaphores.
1384 * GlobalMid_Lock protects:
1385 * list operations on pending_mid_q and oplockQ
1386 * updates to XID counters, multiplex id and SMB sequence numbers
1387 * cifs_file_list_lock protects:
1388 * list operations on tcp and SMB session lists and tCon lists
1389 * f_owner.lock protects certain per file struct operations
1390 * mapping->page_lock protects certain per page operations
1394 * sesSem operations on smb session
1395 * tconSem operations on tree connection
1396 * fh_sem file handle reconnection operations
1398 ****************************************************************************/
1400 #ifdef DECLARE_GLOBALS_HERE
1401 #define GLOBAL_EXTERN
1403 #define GLOBAL_EXTERN extern
1407 * the list of TCP_Server_Info structures, ie each of the sockets
1408 * connecting our client to a distinct server (ip address), is
1409 * chained together by cifs_tcp_ses_list. The list of all our SMB
1410 * sessions (and from that the tree connections) can be found
1411 * by iterating over cifs_tcp_ses_list
1413 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1416 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1417 * tcp session, and the list of tcon's per smb session. It also protects
1418 * the reference counters for the server, smb session, and tcon. Finally,
1419 * changes to the tcon->tidStatus should be done while holding this lock.
1421 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1424 * This lock protects the cifs_file->llist and cifs_file->flist
1425 * list operations, and updates to some flags (cifs_file->invalidHandle)
1426 * It will be moved to either use the tcon->stat_lock or equivalent later.
1427 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1428 * the cifs_tcp_ses_lock must be grabbed first and released last.
1430 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1432 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1433 /* Outstanding dir notify requests */
1434 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1435 /* DirNotify response queue */
1436 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1437 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1440 * Global transaction id (XID) information
1442 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1443 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1444 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1445 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1446 /* on midQ entries */
1448 * Global counters, updated atomically
1450 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1451 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1452 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1453 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1454 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1456 /* Various Debug counters */
1457 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1458 #ifdef CONFIG_CIFS_STATS2
1459 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1460 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1462 GLOBAL_EXTERN atomic_t smBufAllocCount;
1463 GLOBAL_EXTERN atomic_t midCount;
1466 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1467 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1468 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1469 with more secure ntlmssp2 challenge/resp */
1470 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1471 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1472 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1473 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1474 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1475 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1477 #ifdef CONFIG_CIFS_ACL
1478 GLOBAL_EXTERN struct rb_root uidtree;
1479 GLOBAL_EXTERN struct rb_root gidtree;
1480 GLOBAL_EXTERN spinlock_t siduidlock;
1481 GLOBAL_EXTERN spinlock_t sidgidlock;
1482 GLOBAL_EXTERN struct rb_root siduidtree;
1483 GLOBAL_EXTERN struct rb_root sidgidtree;
1484 GLOBAL_EXTERN spinlock_t uidsidlock;
1485 GLOBAL_EXTERN spinlock_t gidsidlock;
1486 #endif /* CONFIG_CIFS_ACL */
1488 void cifs_oplock_break(struct work_struct *work);
1490 extern const struct slow_work_ops cifs_oplock_break_ops;
1491 extern struct workqueue_struct *cifsiod_wq;
1493 extern mempool_t *cifs_mid_poolp;
1495 /* Operations for different SMB versions */
1496 #define SMB1_VERSION_STRING "1.0"
1497 extern struct smb_version_operations smb1_operations;
1498 extern struct smb_version_values smb1_values;
1499 #define SMB20_VERSION_STRING "2.0"
1500 /*extern struct smb_version_operations smb20_operations; */ /* not needed yet */
1501 extern struct smb_version_values smb20_values;
1502 #define SMB21_VERSION_STRING "2.1"
1503 extern struct smb_version_operations smb21_operations;
1504 extern struct smb_version_values smb21_values;
1505 #define SMB30_VERSION_STRING "3.0"
1506 extern struct smb_version_operations smb30_operations;
1507 extern struct smb_version_values smb30_values;
1508 #endif /* _CIFS_GLOB_H */