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 /* SMB echo "timeout" -- FIXME: tunable? */
78 #define SMB_ECHO_INTERVAL (60 * HZ)
82 #ifndef XATTR_DOS_ATTRIB
83 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
87 * CIFS vfs client Status information (based on what we know.)
90 /* associated with each tcp and smb session */
100 LANMAN = 0, /* Legacy LANMAN auth */
101 NTLM, /* Legacy NTLM012 auth with NTLM hash */
102 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
103 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
104 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
105 Kerberos, /* Kerberos via SPNEGO */
111 /* Netbios frames protocol not supported at this time */
119 /* crypto security descriptor definition */
121 struct shash_desc shash;
125 /* crypto hashing related structure/fields, not specific to a sec mech */
126 struct cifs_secmech {
127 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
128 struct crypto_shash *md5; /* md5 hash function */
129 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
130 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
131 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
132 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
135 /* per smb session structure/fields */
136 struct ntlmssp_auth {
137 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
138 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
139 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
140 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
148 struct cifs_sid osid;
149 struct cifs_sid gsid;
150 struct cifs_ntace *ntaces;
151 struct cifs_ace *aces;
155 *****************************************************************
156 * Except the CIFS PDUs themselves all the
157 * globally interesting structs should go here
158 *****************************************************************
162 * A smb_rqst represents a complete request to be issued to a server. It's
163 * formed by a kvec array, followed by an array of pages. Page data is assumed
164 * to start at the beginning of the first page.
167 struct kvec *rq_iov; /* array of kvecs */
168 unsigned int rq_nvec; /* number of kvecs in array */
169 struct page **rq_pages; /* pointer to array of page ptrs */
170 unsigned int rq_npages; /* number pages in array */
171 unsigned int rq_pagesz; /* page size to use */
172 unsigned int rq_tailsz; /* length of last page */
183 struct TCP_Server_Info;
187 struct dfs_info3_param;
191 struct cifs_readdata;
192 struct cifs_writedata;
193 struct cifs_io_parms;
194 struct cifs_search_info;
195 struct cifsInodeInfo;
197 struct smb_version_operations {
198 int (*send_cancel)(struct TCP_Server_Info *, void *,
199 struct mid_q_entry *);
200 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
201 /* setup request: allocate mid, sign message */
202 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
204 /* setup async request: allocate mid, sign message */
205 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
207 /* check response: verify signature, map error */
208 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
210 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
212 void (*set_credits)(struct TCP_Server_Info *, const int);
213 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
214 unsigned int (*get_credits)(struct mid_q_entry *);
215 __u64 (*get_next_mid)(struct TCP_Server_Info *);
216 /* data offset from read response message */
217 unsigned int (*read_data_offset)(char *);
218 /* data length from read response message */
219 unsigned int (*read_data_length)(char *);
220 /* map smb to linux error */
221 int (*map_error)(char *, bool);
222 /* find mid corresponding to the response message */
223 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
224 void (*dump_detail)(void *);
225 void (*clear_stats)(struct cifs_tcon *);
226 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
227 /* verify the message */
228 int (*check_message)(char *, unsigned int);
229 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
230 /* process transaction2 response */
231 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
233 /* check if we need to negotiate */
234 bool (*need_neg)(struct TCP_Server_Info *);
235 /* negotiate to the server */
236 int (*negotiate)(const unsigned int, struct cifs_ses *);
237 /* set negotiated write size */
238 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
239 /* set negotiated read size */
240 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
241 /* setup smb sessionn */
242 int (*sess_setup)(const unsigned int, struct cifs_ses *,
243 const struct nls_table *);
244 /* close smb session */
245 int (*logoff)(const unsigned int, struct cifs_ses *);
246 /* connect to a server share */
247 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
248 struct cifs_tcon *, const struct nls_table *);
249 /* close tree connecion */
250 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
251 /* get DFS referrals */
252 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
253 const char *, struct dfs_info3_param **,
254 unsigned int *, const struct nls_table *, int);
255 /* informational QFS call */
256 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
257 /* check if a path is accessible or not */
258 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
259 struct cifs_sb_info *, const char *);
260 /* query path data from the server */
261 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
262 struct cifs_sb_info *, const char *,
263 FILE_ALL_INFO *, bool *);
264 /* query file data from the server */
265 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
266 struct cifs_fid *, FILE_ALL_INFO *);
267 /* get server index number */
268 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
269 struct cifs_sb_info *, const char *,
270 u64 *uniqueid, FILE_ALL_INFO *);
271 /* set size by path */
272 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
273 const char *, __u64, struct cifs_sb_info *, bool);
274 /* set size by file handle */
275 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
276 struct cifsFileInfo *, __u64, bool);
278 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
280 /* check if we can send an echo or nor */
281 bool (*can_echo)(struct TCP_Server_Info *);
282 /* send echo request */
283 int (*echo)(struct TCP_Server_Info *);
284 /* create directory */
285 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
286 struct cifs_sb_info *);
287 /* set info on created directory */
288 void (*mkdir_setinfo)(struct inode *, const char *,
289 struct cifs_sb_info *, struct cifs_tcon *,
291 /* remove directory */
292 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
293 struct cifs_sb_info *);
295 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
296 struct cifs_sb_info *);
297 /* open, rename and delete file */
298 int (*rename_pending_delete)(const char *, struct dentry *,
300 /* send rename request */
301 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
302 const char *, struct cifs_sb_info *);
303 /* send create hardlink request */
304 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
305 const char *, const char *,
306 struct cifs_sb_info *);
307 /* open a file for non-posix mounts */
308 int (*open)(const unsigned int, struct cifs_tcon *, const char *, int,
309 int, int, struct cifs_fid *, __u32 *, FILE_ALL_INFO *,
310 struct cifs_sb_info *);
311 /* set fid protocol-specific info */
312 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
314 void (*close)(const unsigned int, struct cifs_tcon *,
316 /* send a flush request to the server */
317 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
318 /* async read from the server */
319 int (*async_readv)(struct cifs_readdata *);
320 /* async write to the server */
321 int (*async_writev)(struct cifs_writedata *);
322 /* sync read from the server */
323 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
324 struct cifs_io_parms *, unsigned int *, char **,
326 /* sync write to the server */
327 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
328 struct cifs_io_parms *, unsigned int *, struct kvec *,
330 /* open dir, start readdir */
331 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
332 const char *, struct cifs_sb_info *,
333 struct cifs_fid *, __u16,
334 struct cifs_search_info *);
335 /* continue readdir */
336 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
338 __u16, struct cifs_search_info *srch_inf);
340 int (*close_dir)(const unsigned int, struct cifs_tcon *,
342 /* calculate a size of SMB message */
343 unsigned int (*calc_smb_size)(void *);
344 /* check for STATUS_PENDING and process it in a positive case */
345 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
346 /* send oplock break response */
347 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
348 struct cifsInodeInfo *);
349 /* query remote filesystem */
350 int (*queryfs)(const unsigned int, struct cifs_tcon *,
352 /* send mandatory brlock to the server */
353 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
354 __u64, __u32, int, int, bool);
355 /* unlock range of mandatory locks */
356 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
358 /* push brlocks from the cache to the server */
359 int (*push_mand_locks)(struct cifsFileInfo *);
360 /* get lease key of the inode */
361 void (*get_lease_key)(struct inode *, struct cifs_fid *fid);
362 /* set lease key of the inode */
363 void (*set_lease_key)(struct inode *, struct cifs_fid *fid);
364 /* generate new lease key */
365 void (*new_lease_key)(struct cifs_fid *fid);
366 int (*calc_signature)(struct smb_rqst *rqst,
367 struct TCP_Server_Info *server);
368 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
369 const unsigned char *, const unsigned char *, char *,
370 size_t, const struct nls_table *, int);
371 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
372 const char *, const void *, const __u16,
373 const struct nls_table *, int);
374 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
375 const char *, u32 *);
376 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
378 /* check if we need to issue closedir */
379 bool (*dir_needs_close)(struct cifsFileInfo *);
382 struct smb_version_values {
383 char *version_string;
385 __u32 req_capabilities;
386 __u32 large_lock_type;
387 __u32 exclusive_lock_type;
388 __u32 shared_lock_type;
389 __u32 unlock_lock_type;
391 size_t max_header_size;
392 size_t read_rsp_size;
394 unsigned int cap_unix;
395 unsigned int cap_nt_find;
396 unsigned int cap_large_files;
397 unsigned int oplock_read;
400 #define HEADER_SIZE(server) (server->vals->header_size)
401 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
408 char *iocharset; /* local code page for mapping to and from Unicode */
409 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
410 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
426 bool no_psx_acl:1; /* set if posix acl support should be disabled */
428 bool backupuid_specified; /* mount option backupuid is specified */
429 bool backupgid_specified; /* mount option backupgid is specified */
430 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
431 bool server_ino:1; /* use inode numbers from server ie UniqueId */
433 bool strict_io:1; /* strict cache behavior */
434 bool remap:1; /* set to remap seven reserved chars in filenames */
435 bool posix_paths:1; /* unset to not ask for posix pathnames. */
438 bool nullauth:1; /* attempt to authenticate with null user */
439 bool nocase:1; /* request case insensitive filenames */
440 bool nobrl:1; /* disable sending byte range locks to srv */
441 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
442 bool seal:1; /* request transport encryption on share */
443 bool nodfs:1; /* Do not request DFS, even if available */
444 bool local_lease:1; /* check leases only on local system, not remote */
447 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
448 bool fsc:1; /* enable fscache */
449 bool mfsymlinks:1; /* use Minshall+French Symlinks */
451 bool rwpidforward:1; /* pid forward for read/write operations */
454 bool sockopt_tcp_nodelay:1;
455 unsigned long actimeo; /* attribute cache timeout (jiffies) */
456 struct smb_version_operations *ops;
457 struct smb_version_values *vals;
459 struct sockaddr_storage dstaddr; /* destination address */
460 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
461 struct nls_table *local_nls;
464 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
465 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
466 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
467 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
468 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
469 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
470 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
471 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
472 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
473 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
475 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
476 MS_NODEV | MS_SYNCHRONOUS)
478 struct cifs_mnt_data {
479 struct cifs_sb_info *cifs_sb;
484 static inline unsigned int
485 get_rfc1002_length(void *buf)
487 return be32_to_cpu(*((__be32 *)buf));
491 inc_rfc1001_len(void *buf, int count)
493 be32_add_cpu((__be32 *)buf, count);
496 struct TCP_Server_Info {
497 struct list_head tcp_ses_list;
498 struct list_head smb_ses_list;
499 int srv_count; /* reference counter */
500 /* 15 character server name + 0x20 16th byte indicating type = srv */
501 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
502 struct smb_version_operations *ops;
503 struct smb_version_values *vals;
504 enum statusEnum tcpStatus; /* what we think the status is */
505 char *hostname; /* hostname portion of UNC string */
506 struct socket *ssocket;
507 struct sockaddr_storage dstaddr;
508 struct sockaddr_storage srcaddr; /* locally bind to this IP */
512 wait_queue_head_t response_q;
513 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
514 struct list_head pending_mid_q;
515 bool noblocksnd; /* use blocking sendmsg */
516 bool noautotune; /* do not autotune send buf sizes */
518 int credits; /* send no more requests at once */
519 unsigned int in_flight; /* number of requests on the wire to server */
520 spinlock_t req_lock; /* protect the two values above */
521 struct mutex srv_mutex;
522 struct task_struct *tsk;
523 char server_GUID[16];
525 bool session_estab; /* mark when very first sess is established */
526 #ifdef CONFIG_CIFS_SMB2
527 int echo_credits; /* echo reserved slots */
528 int oplock_credits; /* oplock break reserved slots */
529 bool echoes:1; /* enable echoes */
531 u16 dialect; /* dialect index that server chose */
532 enum securityEnum secType;
533 bool oplocks:1; /* enable oplocks */
534 unsigned int maxReq; /* Clients should submit no more */
535 /* than maxReq distinct unanswered SMBs to the server when using */
536 /* multiplexed reads or writes */
537 unsigned int maxBuf; /* maxBuf specifies the maximum */
538 /* message size the server can send or receive for non-raw SMBs */
539 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
540 /* when socket is setup (and during reconnect) before NegProt sent */
541 unsigned int max_rw; /* maxRw specifies the maximum */
542 /* message size the server can send or receive for */
543 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
544 unsigned int max_vcs; /* maximum number of smb sessions, at least
545 those that can be specified uniquely with
547 unsigned int capabilities; /* selective disabling of caps by smb sess */
548 int timeAdj; /* Adjust for difference in server time zone in sec */
549 __u64 CurrentMid; /* multiplex id - rotating counter */
550 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
551 /* 16th byte of RFC1001 workstation name is always null */
552 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
553 __u32 sequence_number; /* for signing, protected by srv_mutex */
554 struct session_key session_key;
555 unsigned long lstrp; /* when we got last response from this server */
556 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
557 /* extended security flavors that server supports */
558 bool sec_ntlmssp; /* supports NTLMSSP */
559 bool sec_kerberosu2u; /* supports U2U Kerberos */
560 bool sec_kerberos; /* supports plain Kerberos */
561 bool sec_mskerberos; /* supports legacy MS Kerberos */
562 bool large_buf; /* is current buffer large? */
563 struct delayed_work echo; /* echo ping workqueue job */
564 struct kvec *iov; /* reusable kvec array for receives */
565 unsigned int nr_iov; /* number of kvecs in array */
566 char *smallbuf; /* pointer to current "small" buffer */
567 char *bigbuf; /* pointer to current "big" buffer */
568 unsigned int total_read; /* total amount of data read in this pass */
569 #ifdef CONFIG_CIFS_FSCACHE
570 struct fscache_cookie *fscache; /* client index cache cookie */
572 #ifdef CONFIG_CIFS_STATS2
573 atomic_t in_send; /* requests trying to send */
574 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
576 #ifdef CONFIG_CIFS_SMB2
577 unsigned int max_read;
578 unsigned int max_write;
579 #endif /* CONFIG_CIFS_SMB2 */
582 static inline unsigned int
583 in_flight(struct TCP_Server_Info *server)
586 spin_lock(&server->req_lock);
587 num = server->in_flight;
588 spin_unlock(&server->req_lock);
593 has_credits(struct TCP_Server_Info *server, int *credits)
596 spin_lock(&server->req_lock);
598 spin_unlock(&server->req_lock);
603 add_credits(struct TCP_Server_Info *server, const unsigned int add,
606 server->ops->add_credits(server, add, optype);
610 set_credits(struct TCP_Server_Info *server, const int val)
612 server->ops->set_credits(server, val);
616 get_next_mid(struct TCP_Server_Info *server)
618 return server->ops->get_next_mid(server);
622 * When the server supports very large reads and writes via POSIX extensions,
623 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
624 * including the RFC1001 length.
626 * Note that this might make for "interesting" allocation problems during
627 * writeback however as we have to allocate an array of pointers for the
628 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
630 * For reads, there is a similar problem as we need to allocate an array
631 * of kvecs to handle the receive, though that should only need to be done
634 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
635 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
638 * When the server doesn't allow large posix writes, only allow a rsize/wsize
639 * of 2^17-1 minus the size of the call header. That allows for a read or
640 * write up to the maximum size described by RFC1002.
642 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
643 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
646 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
647 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
648 * a single wsize request with a single call.
650 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
653 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
654 * those values when posix extensions aren't in force. In actuality here, we
655 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
656 * to be ok with the extra byte even though Windows doesn't send writes that
661 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
663 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
664 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
667 * Macros to allow the TCP_Server_Info->net field and related code to drop out
668 * when CONFIG_NET_NS isn't set.
673 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
678 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
685 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
690 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
697 * Session structure. One of these for each uid session with a particular host
700 struct list_head smb_ses_list;
701 struct list_head tcon_list;
702 struct mutex session_mutex;
703 struct TCP_Server_Info *server; /* pointer to server info */
704 int ses_count; /* reference counter */
705 enum statusEnum status;
706 unsigned overrideSecFlg; /* if non-zero override global sec flags */
707 __u16 ipc_tid; /* special tid for connection to IPC share */
710 char *serverOS; /* name of operating system underlying server */
711 char *serverNOS; /* name of network operating system of server */
712 char *serverDomain; /* security realm of server */
713 __u64 Suid; /* remote smb uid */
714 kuid_t linux_uid; /* overriding owner of files on the mount */
715 kuid_t cred_uid; /* owner of credentials */
716 unsigned int capabilities;
717 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
718 TCP names - will ipv6 and sctp addresses fit? */
719 char *user_name; /* must not be null except during init of sess
720 and after mount option parsing we fill it */
723 struct session_key auth_key;
724 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
725 bool need_reconnect:1; /* connection reset, uid now invalid */
726 #ifdef CONFIG_CIFS_SMB2
728 #endif /* CONFIG_CIFS_SMB2 */
731 /* no more than one of the following three session flags may be set */
732 #define CIFS_SES_NT4 1
733 #define CIFS_SES_OS2 2
734 #define CIFS_SES_W9X 4
735 /* following flag is set for old servers such as OS2 (and Win95?)
736 which do not negotiate NTLM or POSIX dialects, but instead
737 negotiate one of the older LANMAN dialects */
738 #define CIFS_SES_LANMAN 8
741 cap_unix(struct cifs_ses *ses)
743 return ses->server->vals->cap_unix & ses->capabilities;
747 * there is one of these for each connection to a resource on a particular
751 struct list_head tcon_list;
753 struct list_head openFileList;
754 struct cifs_ses *ses; /* pointer to session associated with */
755 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
756 char *nativeFileSystem;
757 char *password; /* for share-level security */
758 __u32 tid; /* The 4 byte tree id */
759 __u16 Flags; /* optional support bits */
760 enum statusEnum tidStatus;
761 #ifdef CONFIG_CIFS_STATS
762 atomic_t num_smbs_sent;
767 atomic_t num_flushes;
768 atomic_t num_oplock_brks;
771 atomic_t num_deletes;
773 atomic_t num_posixopens;
774 atomic_t num_posixmkdirs;
776 atomic_t num_renames;
777 atomic_t num_t2renames;
781 atomic_t num_hardlinks;
782 atomic_t num_symlinks;
784 atomic_t num_acl_get;
785 atomic_t num_acl_set;
787 #ifdef CONFIG_CIFS_SMB2
789 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
790 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
792 #endif /* CONFIG_CIFS_SMB2 */
794 #ifdef CONFIG_CIFS_STATS2
795 unsigned long long time_writes;
796 unsigned long long time_reads;
797 unsigned long long time_opens;
798 unsigned long long time_deletes;
799 unsigned long long time_closes;
800 unsigned long long time_mkdirs;
801 unsigned long long time_rmdirs;
802 unsigned long long time_renames;
803 unsigned long long time_t2renames;
804 unsigned long long time_ffirst;
805 unsigned long long time_fnext;
806 unsigned long long time_fclose;
807 #endif /* CONFIG_CIFS_STATS2 */
810 spinlock_t stat_lock;
811 #endif /* CONFIG_CIFS_STATS */
812 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
813 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
814 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
815 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
818 bool seal:1; /* transport encryption for this mounted share */
819 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
820 for this mount even if server would support */
821 bool local_lease:1; /* check leases (only) on local system not remote */
822 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
823 bool need_reconnect:1; /* connection reset, tid now invalid */
824 #ifdef CONFIG_CIFS_SMB2
825 bool print:1; /* set if connection to printer share */
826 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
829 __u32 maximal_access;
830 __u32 vol_serial_number;
831 __le64 vol_create_time;
832 #endif /* CONFIG_CIFS_SMB2 */
833 #ifdef CONFIG_CIFS_FSCACHE
834 u64 resource_id; /* server resource id */
835 struct fscache_cookie *fscache; /* cookie for share */
837 struct list_head pending_opens; /* list of incomplete opens */
838 /* BB add field for back pointer to sb struct(s)? */
842 * This is a refcounted and timestamped container for a tcon pointer. The
843 * container holds a tcon reference. It is considered safe to free one of
844 * these when the tl_count goes to 0. The tl_time is the time of the last
845 * "get" on the container.
848 struct rb_node tl_rbnode;
850 unsigned long tl_flags;
851 #define TCON_LINK_MASTER 0
852 #define TCON_LINK_PENDING 1
853 #define TCON_LINK_IN_TREE 2
854 unsigned long tl_time;
856 struct cifs_tcon *tl_tcon;
859 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
861 static inline struct cifs_tcon *
862 tlink_tcon(struct tcon_link *tlink)
864 return tlink->tl_tcon;
867 extern void cifs_put_tlink(struct tcon_link *tlink);
869 static inline struct tcon_link *
870 cifs_get_tlink(struct tcon_link *tlink)
872 if (tlink && !IS_ERR(tlink))
873 atomic_inc(&tlink->tl_count);
877 /* This function is always expected to succeed */
878 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
880 #define CIFS_OPLOCK_NO_CHANGE 0xfe
882 struct cifs_pending_open {
883 struct list_head olist;
884 struct tcon_link *tlink;
890 * This info hangs off the cifsFileInfo structure, pointed to by llist.
891 * This is used to track byte stream locks on the file
893 struct cifsLockInfo {
894 struct list_head llist; /* pointer to next cifsLockInfo */
895 struct list_head blist; /* pointer to locks blocked on this */
896 wait_queue_head_t block_q;
904 * One of these for each open instance of a file
906 struct cifs_search_info {
907 loff_t index_of_last_entry;
908 __u16 entries_in_buffer;
911 char *ntwrk_buf_start;
912 char *srch_entries_start;
914 const char *presume_name;
915 unsigned int resume_name_len;
919 bool smallBuf:1; /* so we know which buf_release function to call */
924 #ifdef CONFIG_CIFS_SMB2
925 __u64 persistent_fid; /* persist file id for smb2 */
926 __u64 volatile_fid; /* volatile file id for smb2 */
927 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
929 struct cifs_pending_open *pending_open;
932 struct cifs_fid_locks {
933 struct list_head llist;
934 struct cifsFileInfo *cfile; /* fid that owns locks */
935 struct list_head locks; /* locks held by fid above */
938 struct cifsFileInfo {
939 struct list_head tlist; /* pointer to next fid owned by tcon */
940 struct list_head flist; /* next fid (file instance) for this inode */
941 struct cifs_fid_locks *llist; /* brlocks held by this fid */
942 kuid_t uid; /* allows finding which FileInfo structure */
943 __u32 pid; /* process id who opened file */
944 struct cifs_fid fid; /* file id from remote */
945 /* BB add lock scope info here if needed */ ;
946 /* lock scope id (0 if none) */
947 struct dentry *dentry;
948 unsigned int f_flags;
949 struct tcon_link *tlink;
950 bool invalidHandle:1; /* file closed via session abend */
951 bool oplock_break_cancelled:1;
952 int count; /* refcount protected by cifs_file_list_lock */
953 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
954 struct cifs_search_info srch_inf;
955 struct work_struct oplock_break; /* work for oplock breaks */
958 struct cifs_io_parms {
960 #ifdef CONFIG_CIFS_SMB2
961 __u64 persistent_fid; /* persist file id for smb2 */
962 __u64 volatile_fid; /* volatile file id for smb2 */
967 struct cifs_tcon *tcon;
970 struct cifs_readdata;
972 /* asynchronous read support */
973 struct cifs_readdata {
974 struct kref refcount;
975 struct list_head list;
976 struct completion done;
977 struct cifsFileInfo *cfile;
978 struct address_space *mapping;
983 struct work_struct work;
984 int (*read_into_pages)(struct TCP_Server_Info *server,
985 struct cifs_readdata *rdata,
990 unsigned int nr_pages;
991 struct page *pages[];
994 struct cifs_writedata;
996 /* asynchronous write support */
997 struct cifs_writedata {
998 struct kref refcount;
999 struct list_head list;
1000 struct completion done;
1001 enum writeback_sync_modes sync_mode;
1002 struct work_struct work;
1003 struct cifsFileInfo *cfile;
1008 unsigned int pagesz;
1009 unsigned int tailsz;
1010 unsigned int nr_pages;
1011 struct page *pages[1];
1015 * Take a reference on the file private data. Must be called with
1016 * cifs_file_list_lock held.
1019 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
1024 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1025 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1028 * One of these for each file inode
1031 struct cifsInodeInfo {
1032 bool can_cache_brlcks;
1033 struct list_head llist; /* locks helb by this inode */
1034 struct rw_semaphore lock_sem; /* protect the fields above */
1035 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1036 struct list_head openFileList;
1037 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1038 bool clientCanCacheRead; /* read oplock */
1039 bool clientCanCacheAll; /* read and writebehind oplock */
1040 bool delete_pending; /* DELETE_ON_CLOSE is set */
1041 bool invalid_mapping; /* pagecache is invalid */
1042 unsigned long time; /* jiffies of last update of inode */
1043 u64 server_eof; /* current file size on server -- protected by i_lock */
1044 u64 uniqueid; /* server inode number */
1045 u64 createtime; /* creation time on server */
1046 #ifdef CONFIG_CIFS_SMB2
1047 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1049 #ifdef CONFIG_CIFS_FSCACHE
1050 struct fscache_cookie *fscache;
1052 struct inode vfs_inode;
1055 static inline struct cifsInodeInfo *
1056 CIFS_I(struct inode *inode)
1058 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1061 static inline struct cifs_sb_info *
1062 CIFS_SB(struct super_block *sb)
1064 return sb->s_fs_info;
1067 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1069 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1076 convert_delimiter(char *path, char delim)
1078 char old_delim, *pos;
1086 while ((pos = strchr(pos, old_delim)))
1090 #ifdef CONFIG_CIFS_STATS
1091 #define cifs_stats_inc atomic_inc
1093 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1097 spin_lock(&tcon->stat_lock);
1098 tcon->bytes_written += bytes;
1099 spin_unlock(&tcon->stat_lock);
1103 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1106 spin_lock(&tcon->stat_lock);
1107 tcon->bytes_read += bytes;
1108 spin_unlock(&tcon->stat_lock);
1112 #define cifs_stats_inc(field) do {} while (0)
1113 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1114 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1120 * This is the prototype for the mid receive function. This function is for
1121 * receiving the rest of the SMB frame, starting with the WordCount (which is
1122 * just after the MID in struct smb_hdr). Note:
1124 * - This will be called by cifsd, with no locks held.
1125 * - The mid will still be on the pending_mid_q.
1126 * - mid->resp_buf will point to the current buffer.
1128 * Returns zero on a successful receive, or an error. The receive state in
1129 * the TCP_Server_Info will also be updated.
1131 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1132 struct mid_q_entry *mid);
1135 * This is the prototype for the mid callback function. This is called once the
1136 * mid has been received off of the socket. When creating one, take special
1137 * care to avoid deadlocks. Things to bear in mind:
1139 * - it will be called by cifsd, with no locks held
1140 * - the mid will be removed from any lists
1142 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1144 /* one of these for every pending CIFS request to the server */
1145 struct mid_q_entry {
1146 struct list_head qhead; /* mids waiting on reply from this server */
1147 struct TCP_Server_Info *server; /* server corresponding to this mid */
1148 __u64 mid; /* multiplex id */
1149 __u32 pid; /* process id */
1150 __u32 sequence_number; /* for CIFS signing */
1151 unsigned long when_alloc; /* when mid was created */
1152 #ifdef CONFIG_CIFS_STATS2
1153 unsigned long when_sent; /* time when smb send finished */
1154 unsigned long when_received; /* when demux complete (taken off wire) */
1156 mid_receive_t *receive; /* call receive callback */
1157 mid_callback_t *callback; /* call completion callback */
1158 void *callback_data; /* general purpose pointer for callback */
1159 void *resp_buf; /* pointer to received SMB header */
1160 int mid_state; /* wish this were enum but can not pass to wait_event */
1161 __le16 command; /* smb command code */
1162 bool large_buf:1; /* if valid response, is pointer to large buf */
1163 bool multiRsp:1; /* multiple trans2 responses for one request */
1164 bool multiEnd:1; /* both received */
1167 /* Make code in transport.c a little cleaner by moving
1168 update of optional stats into function below */
1169 #ifdef CONFIG_CIFS_STATS2
1171 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1173 atomic_inc(&server->in_send);
1176 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1178 atomic_dec(&server->in_send);
1181 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1183 atomic_inc(&server->num_waiters);
1186 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1188 atomic_dec(&server->num_waiters);
1191 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1193 mid->when_sent = jiffies;
1196 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1199 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1203 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1207 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1211 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1216 /* for pending dnotify requests */
1217 struct dir_notify_req {
1218 struct list_head lhead;
1225 __u32 filter; /* CompletionFilter (for multishot) */
1230 struct dfs_info3_param {
1231 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1240 * common struct for holding inode info when searching for or updating an
1241 * inode with new info
1244 #define CIFS_FATTR_DFS_REFERRAL 0x1
1245 #define CIFS_FATTR_DELETE_PENDING 0x2
1246 #define CIFS_FATTR_NEED_REVAL 0x4
1247 #define CIFS_FATTR_INO_COLLISION 0x8
1260 unsigned int cf_nlink;
1261 unsigned int cf_dtype;
1262 struct timespec cf_atime;
1263 struct timespec cf_mtime;
1264 struct timespec cf_ctime;
1267 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1270 kfree(param->path_name);
1271 kfree(param->node_name);
1276 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1277 int number_of_items)
1280 if ((number_of_items == 0) || (param == NULL))
1282 for (i = 0; i < number_of_items; i++) {
1283 kfree(param[i].path_name);
1284 kfree(param[i].node_name);
1290 #define MID_REQUEST_ALLOCATED 1
1291 #define MID_REQUEST_SUBMITTED 2
1292 #define MID_RESPONSE_RECEIVED 4
1293 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1294 #define MID_RESPONSE_MALFORMED 0x10
1295 #define MID_SHUTDOWN 0x20
1297 /* Types of response buffer returned from SendReceive2 */
1298 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1299 #define CIFS_SMALL_BUFFER 1
1300 #define CIFS_LARGE_BUFFER 2
1301 #define CIFS_IOVEC 4 /* array of response buffers */
1303 /* Type of Request to SendReceive2 */
1304 #define CIFS_BLOCKING_OP 1 /* operation can block */
1305 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1306 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1307 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1308 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1309 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1311 /* Type of request operation */
1312 #define CIFS_ECHO_OP 0x080 /* echo request */
1313 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1314 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1315 #define CIFS_OP_MASK 0x0380 /* mask request type */
1317 /* Security Flags: indicate type of session setup needed */
1318 #define CIFSSEC_MAY_SIGN 0x00001
1319 #define CIFSSEC_MAY_NTLM 0x00002
1320 #define CIFSSEC_MAY_NTLMV2 0x00004
1321 #define CIFSSEC_MAY_KRB5 0x00008
1322 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1323 #define CIFSSEC_MAY_LANMAN 0x00010
1324 #define CIFSSEC_MAY_PLNTXT 0x00020
1326 #define CIFSSEC_MAY_LANMAN 0
1327 #define CIFSSEC_MAY_PLNTXT 0
1328 #endif /* weak passwords */
1329 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1330 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1332 #define CIFSSEC_MUST_SIGN 0x01001
1333 /* note that only one of the following can be set so the
1334 result of setting MUST flags more than once will be to
1335 require use of the stronger protocol */
1336 #define CIFSSEC_MUST_NTLM 0x02002
1337 #define CIFSSEC_MUST_NTLMV2 0x04004
1338 #define CIFSSEC_MUST_KRB5 0x08008
1339 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1340 #define CIFSSEC_MUST_LANMAN 0x10010
1341 #define CIFSSEC_MUST_PLNTXT 0x20020
1342 #ifdef CONFIG_CIFS_UPCALL
1343 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1345 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1347 #else /* do not allow weak pw hash */
1348 #define CIFSSEC_MUST_LANMAN 0
1349 #define CIFSSEC_MUST_PLNTXT 0
1350 #ifdef CONFIG_CIFS_UPCALL
1351 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1353 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1355 #endif /* WEAK_PW_HASH */
1356 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1357 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1359 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMSSP)
1360 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1361 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1363 *****************************************************************
1364 * All constants go here
1365 *****************************************************************
1368 #define UID_HASH (16)
1371 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1372 * following to be declared.
1375 /****************************************************************************
1376 * Locking notes. All updates to global variables and lists should be
1377 * protected by spinlocks or semaphores.
1381 * GlobalMid_Lock protects:
1382 * list operations on pending_mid_q and oplockQ
1383 * updates to XID counters, multiplex id and SMB sequence numbers
1384 * cifs_file_list_lock protects:
1385 * list operations on tcp and SMB session lists and tCon lists
1386 * f_owner.lock protects certain per file struct operations
1387 * mapping->page_lock protects certain per page operations
1391 * sesSem operations on smb session
1392 * tconSem operations on tree connection
1393 * fh_sem file handle reconnection operations
1395 ****************************************************************************/
1397 #ifdef DECLARE_GLOBALS_HERE
1398 #define GLOBAL_EXTERN
1400 #define GLOBAL_EXTERN extern
1404 * the list of TCP_Server_Info structures, ie each of the sockets
1405 * connecting our client to a distinct server (ip address), is
1406 * chained together by cifs_tcp_ses_list. The list of all our SMB
1407 * sessions (and from that the tree connections) can be found
1408 * by iterating over cifs_tcp_ses_list
1410 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1413 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1414 * tcp session, and the list of tcon's per smb session. It also protects
1415 * the reference counters for the server, smb session, and tcon. Finally,
1416 * changes to the tcon->tidStatus should be done while holding this lock.
1418 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1421 * This lock protects the cifs_file->llist and cifs_file->flist
1422 * list operations, and updates to some flags (cifs_file->invalidHandle)
1423 * It will be moved to either use the tcon->stat_lock or equivalent later.
1424 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1425 * the cifs_tcp_ses_lock must be grabbed first and released last.
1427 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1429 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1430 /* Outstanding dir notify requests */
1431 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1432 /* DirNotify response queue */
1433 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1434 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1437 * Global transaction id (XID) information
1439 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1440 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1441 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1442 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1443 /* on midQ entries */
1445 * Global counters, updated atomically
1447 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1448 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1449 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1450 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1451 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1453 /* Various Debug counters */
1454 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1455 #ifdef CONFIG_CIFS_STATS2
1456 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1457 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1459 GLOBAL_EXTERN atomic_t smBufAllocCount;
1460 GLOBAL_EXTERN atomic_t midCount;
1463 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1464 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1465 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1466 with more secure ntlmssp2 challenge/resp */
1467 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1468 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1469 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1470 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1471 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1472 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1474 #ifdef CONFIG_CIFS_ACL
1475 GLOBAL_EXTERN struct rb_root uidtree;
1476 GLOBAL_EXTERN struct rb_root gidtree;
1477 GLOBAL_EXTERN spinlock_t siduidlock;
1478 GLOBAL_EXTERN spinlock_t sidgidlock;
1479 GLOBAL_EXTERN struct rb_root siduidtree;
1480 GLOBAL_EXTERN struct rb_root sidgidtree;
1481 GLOBAL_EXTERN spinlock_t uidsidlock;
1482 GLOBAL_EXTERN spinlock_t gidsidlock;
1483 #endif /* CONFIG_CIFS_ACL */
1485 void cifs_oplock_break(struct work_struct *work);
1487 extern const struct slow_work_ops cifs_oplock_break_ops;
1488 extern struct workqueue_struct *cifsiod_wq;
1490 extern mempool_t *cifs_mid_poolp;
1492 /* Operations for different SMB versions */
1493 #define SMB1_VERSION_STRING "1.0"
1494 extern struct smb_version_operations smb1_operations;
1495 extern struct smb_version_values smb1_values;
1496 #define SMB20_VERSION_STRING "2.0"
1497 /*extern struct smb_version_operations smb20_operations; */ /* not needed yet */
1498 extern struct smb_version_values smb20_values;
1499 #define SMB21_VERSION_STRING "2.1"
1500 extern struct smb_version_operations smb21_operations;
1501 extern struct smb_version_values smb21_values;
1502 #define SMB30_VERSION_STRING "3.0"
1503 extern struct smb_version_operations smb30_operations;
1504 extern struct smb_version_values smb30_values;
1505 #endif /* _CIFS_GLOB_H */