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
36 * The sizes of various internal tables and strings
38 #define MAX_UID_INFO 16
39 #define MAX_SES_INFO 2
40 #define MAX_TCON_INFO 4
42 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
43 #define MAX_SERVER_SIZE 15
44 #define MAX_SHARE_SIZE 80
45 #define MAX_USERNAME_SIZE 256 /* reasonable maximum for current servers */
46 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
48 #define CIFS_MIN_RCV_POOL 4
50 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
52 * default attribute cache timeout (jiffies)
54 #define CIFS_DEF_ACTIMEO (1 * HZ)
57 * max attribute cache timeout (jiffies) - 2^30
59 #define CIFS_MAX_ACTIMEO (1 << 30)
62 * MAX_REQ is the maximum number of requests that WE will send
63 * on one socket concurrently.
65 #define CIFS_MAX_REQ 32767
67 #define RFC1001_NAME_LEN 15
68 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
70 /* currently length of NIP6_FMT */
71 #define SERVER_NAME_LENGTH 40
72 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
74 /* used to define string lengths for reversing unicode strings */
76 /* (max path length + 1 for null) * 2 for unicode */
79 /* SMB echo "timeout" -- FIXME: tunable? */
80 #define SMB_ECHO_INTERVAL (60 * HZ)
84 #ifndef XATTR_DOS_ATTRIB
85 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
89 * CIFS vfs client Status information (based on what we know.)
92 /* associated with each tcp and smb session */
102 LANMAN = 0, /* Legacy LANMAN auth */
103 NTLM, /* Legacy NTLM012 auth with NTLM hash */
104 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
105 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
106 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
107 Kerberos, /* Kerberos via SPNEGO */
113 /* Netbios frames protocol not supported at this time */
121 /* crypto security descriptor definition */
123 struct shash_desc shash;
127 /* crypto hashing related structure/fields, not specific to a sec mech */
128 struct cifs_secmech {
129 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
130 struct crypto_shash *md5; /* md5 hash function */
131 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
132 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
133 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
134 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
137 /* per smb session structure/fields */
138 struct ntlmssp_auth {
139 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
140 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
141 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
142 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
150 struct cifs_sid osid;
151 struct cifs_sid gsid;
152 struct cifs_ntace *ntaces;
153 struct cifs_ace *aces;
157 *****************************************************************
158 * Except the CIFS PDUs themselves all the
159 * globally interesting structs should go here
160 *****************************************************************
169 struct TCP_Server_Info;
173 struct dfs_info3_param;
177 struct cifs_readdata;
178 struct cifs_writedata;
179 struct cifs_io_parms;
180 struct cifs_search_info;
181 struct cifsInodeInfo;
183 struct smb_version_operations {
184 int (*send_cancel)(struct TCP_Server_Info *, void *,
185 struct mid_q_entry *);
186 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
187 /* setup request: allocate mid, sign message */
188 int (*setup_request)(struct cifs_ses *, struct kvec *, unsigned int,
189 struct mid_q_entry **);
190 /* setup async request: allocate mid, sign message */
191 int (*setup_async_request)(struct TCP_Server_Info *, struct kvec *,
192 unsigned int, struct mid_q_entry **);
193 /* check response: verify signature, map error */
194 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
196 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
198 void (*set_credits)(struct TCP_Server_Info *, const int);
199 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
200 unsigned int (*get_credits)(struct mid_q_entry *);
201 __u64 (*get_next_mid)(struct TCP_Server_Info *);
202 /* data offset from read response message */
203 unsigned int (*read_data_offset)(char *);
204 /* data length from read response message */
205 unsigned int (*read_data_length)(char *);
206 /* map smb to linux error */
207 int (*map_error)(char *, bool);
208 /* find mid corresponding to the response message */
209 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
210 void (*dump_detail)(void *);
211 void (*clear_stats)(struct cifs_tcon *);
212 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
213 /* verify the message */
214 int (*check_message)(char *, unsigned int);
215 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
216 /* process transaction2 response */
217 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
219 /* check if we need to negotiate */
220 bool (*need_neg)(struct TCP_Server_Info *);
221 /* negotiate to the server */
222 int (*negotiate)(const unsigned int, struct cifs_ses *);
223 /* set negotiated write size */
224 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
225 /* set negotiated read size */
226 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
227 /* setup smb sessionn */
228 int (*sess_setup)(const unsigned int, struct cifs_ses *,
229 const struct nls_table *);
230 /* close smb session */
231 int (*logoff)(const unsigned int, struct cifs_ses *);
232 /* connect to a server share */
233 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
234 struct cifs_tcon *, const struct nls_table *);
235 /* close tree connecion */
236 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
237 /* get DFS referrals */
238 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
239 const char *, struct dfs_info3_param **,
240 unsigned int *, const struct nls_table *, int);
241 /* informational QFS call */
242 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
243 /* check if a path is accessible or not */
244 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
245 struct cifs_sb_info *, const char *);
246 /* query path data from the server */
247 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
248 struct cifs_sb_info *, const char *,
249 FILE_ALL_INFO *, bool *);
250 /* query file data from the server */
251 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
252 struct cifs_fid *, FILE_ALL_INFO *);
253 /* get server index number */
254 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
255 struct cifs_sb_info *, const char *,
256 u64 *uniqueid, FILE_ALL_INFO *);
257 /* set size by path */
258 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
259 const char *, __u64, struct cifs_sb_info *, bool);
260 /* set size by file handle */
261 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
262 struct cifsFileInfo *, __u64, bool);
264 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
266 /* build a full path to the root of the mount */
267 char * (*build_path_to_root)(struct smb_vol *, struct cifs_sb_info *,
269 /* check if we can send an echo or nor */
270 bool (*can_echo)(struct TCP_Server_Info *);
271 /* send echo request */
272 int (*echo)(struct TCP_Server_Info *);
273 /* create directory */
274 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
275 struct cifs_sb_info *);
276 /* set info on created directory */
277 void (*mkdir_setinfo)(struct inode *, const char *,
278 struct cifs_sb_info *, struct cifs_tcon *,
280 /* remove directory */
281 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
282 struct cifs_sb_info *);
284 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
285 struct cifs_sb_info *);
286 /* open, rename and delete file */
287 int (*rename_pending_delete)(const char *, struct dentry *,
289 /* send rename request */
290 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
291 const char *, struct cifs_sb_info *);
292 /* send create hardlink request */
293 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
294 const char *, const char *,
295 struct cifs_sb_info *);
296 /* open a file for non-posix mounts */
297 int (*open)(const unsigned int, struct cifs_tcon *, const char *, int,
298 int, int, struct cifs_fid *, __u32 *, FILE_ALL_INFO *,
299 struct cifs_sb_info *);
300 /* set fid protocol-specific info */
301 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
303 int (*close)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
304 /* send a flush request to the server */
305 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
306 /* async read from the server */
307 int (*async_readv)(struct cifs_readdata *);
308 /* async write to the server */
309 int (*async_writev)(struct cifs_writedata *);
310 /* sync read from the server */
311 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
312 struct cifs_io_parms *, unsigned int *, char **,
314 /* sync write to the server */
315 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
316 struct cifs_io_parms *, unsigned int *, struct kvec *,
318 /* open dir, start readdir */
319 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
320 const char *, struct cifs_sb_info *,
321 struct cifs_fid *, __u16,
322 struct cifs_search_info *);
323 /* continue readdir */
324 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
326 __u16, struct cifs_search_info *srch_inf);
328 int (*close_dir)(const unsigned int, struct cifs_tcon *,
330 /* calculate a size of SMB message */
331 unsigned int (*calc_smb_size)(void *);
332 /* check for STATUS_PENDING and process it in a positive case */
333 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
334 /* send oplock break response */
335 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
336 struct cifsInodeInfo *);
339 struct smb_version_values {
340 char *version_string;
341 __u32 large_lock_type;
342 __u32 exclusive_lock_type;
343 __u32 shared_lock_type;
344 __u32 unlock_lock_type;
346 size_t max_header_size;
347 size_t read_rsp_size;
349 unsigned int cap_unix;
350 unsigned int cap_nt_find;
351 unsigned int cap_large_files;
354 #define HEADER_SIZE(server) (server->vals->header_size)
355 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
363 char *iocharset; /* local code page for mapping to and from Unicode */
364 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
365 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
381 bool no_psx_acl:1; /* set if posix acl support should be disabled */
383 bool backupuid_specified; /* mount option backupuid is specified */
384 bool backupgid_specified; /* mount option backupgid is specified */
385 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
386 bool server_ino:1; /* use inode numbers from server ie UniqueId */
388 bool strict_io:1; /* strict cache behavior */
389 bool remap:1; /* set to remap seven reserved chars in filenames */
390 bool posix_paths:1; /* unset to not ask for posix pathnames. */
393 bool nullauth:1; /* attempt to authenticate with null user */
394 bool nocase:1; /* request case insensitive filenames */
395 bool nobrl:1; /* disable sending byte range locks to srv */
396 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
397 bool seal:1; /* request transport encryption on share */
398 bool nodfs:1; /* Do not request DFS, even if available */
399 bool local_lease:1; /* check leases only on local system, not remote */
402 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
403 bool fsc:1; /* enable fscache */
404 bool mfsymlinks:1; /* use Minshall+French Symlinks */
406 bool rwpidforward:1; /* pid forward for read/write operations */
409 bool sockopt_tcp_nodelay:1;
410 unsigned short int port;
411 unsigned long actimeo; /* attribute cache timeout (jiffies) */
412 struct smb_version_operations *ops;
413 struct smb_version_values *vals;
415 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
416 struct nls_table *local_nls;
419 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
420 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
421 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
422 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
423 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
424 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
425 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
426 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
427 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
428 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
430 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
431 MS_NODEV | MS_SYNCHRONOUS)
433 struct cifs_mnt_data {
434 struct cifs_sb_info *cifs_sb;
439 static inline unsigned int
440 get_rfc1002_length(void *buf)
442 return be32_to_cpu(*((__be32 *)buf));
446 inc_rfc1001_len(void *buf, int count)
448 be32_add_cpu((__be32 *)buf, count);
451 struct TCP_Server_Info {
452 struct list_head tcp_ses_list;
453 struct list_head smb_ses_list;
454 int srv_count; /* reference counter */
455 /* 15 character server name + 0x20 16th byte indicating type = srv */
456 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
457 struct smb_version_operations *ops;
458 struct smb_version_values *vals;
459 enum statusEnum tcpStatus; /* what we think the status is */
460 char *hostname; /* hostname portion of UNC string */
461 struct socket *ssocket;
462 struct sockaddr_storage dstaddr;
463 struct sockaddr_storage srcaddr; /* locally bind to this IP */
467 wait_queue_head_t response_q;
468 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
469 struct list_head pending_mid_q;
470 bool noblocksnd; /* use blocking sendmsg */
471 bool noautotune; /* do not autotune send buf sizes */
473 int credits; /* send no more requests at once */
474 unsigned int in_flight; /* number of requests on the wire to server */
475 spinlock_t req_lock; /* protect the two values above */
476 struct mutex srv_mutex;
477 struct task_struct *tsk;
478 char server_GUID[16];
480 bool session_estab; /* mark when very first sess is established */
481 #ifdef CONFIG_CIFS_SMB2
482 int echo_credits; /* echo reserved slots */
483 int oplock_credits; /* oplock break reserved slots */
484 bool echoes:1; /* enable echoes */
486 u16 dialect; /* dialect index that server chose */
487 enum securityEnum secType;
488 bool oplocks:1; /* enable oplocks */
489 unsigned int maxReq; /* Clients should submit no more */
490 /* than maxReq distinct unanswered SMBs to the server when using */
491 /* multiplexed reads or writes */
492 unsigned int maxBuf; /* maxBuf specifies the maximum */
493 /* message size the server can send or receive for non-raw SMBs */
494 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
495 /* when socket is setup (and during reconnect) before NegProt sent */
496 unsigned int max_rw; /* maxRw specifies the maximum */
497 /* message size the server can send or receive for */
498 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
499 unsigned int max_vcs; /* maximum number of smb sessions, at least
500 those that can be specified uniquely with
502 unsigned int capabilities; /* selective disabling of caps by smb sess */
503 int timeAdj; /* Adjust for difference in server time zone in sec */
504 __u64 CurrentMid; /* multiplex id - rotating counter */
505 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
506 /* 16th byte of RFC1001 workstation name is always null */
507 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
508 __u32 sequence_number; /* for signing, protected by srv_mutex */
509 struct session_key session_key;
510 unsigned long lstrp; /* when we got last response from this server */
511 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
512 /* extended security flavors that server supports */
513 bool sec_ntlmssp; /* supports NTLMSSP */
514 bool sec_kerberosu2u; /* supports U2U Kerberos */
515 bool sec_kerberos; /* supports plain Kerberos */
516 bool sec_mskerberos; /* supports legacy MS Kerberos */
517 bool large_buf; /* is current buffer large? */
518 struct delayed_work echo; /* echo ping workqueue job */
519 struct kvec *iov; /* reusable kvec array for receives */
520 unsigned int nr_iov; /* number of kvecs in array */
521 char *smallbuf; /* pointer to current "small" buffer */
522 char *bigbuf; /* pointer to current "big" buffer */
523 unsigned int total_read; /* total amount of data read in this pass */
524 #ifdef CONFIG_CIFS_FSCACHE
525 struct fscache_cookie *fscache; /* client index cache cookie */
527 #ifdef CONFIG_CIFS_STATS2
528 atomic_t in_send; /* requests trying to send */
529 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
531 #ifdef CONFIG_CIFS_SMB2
532 unsigned int max_read;
533 unsigned int max_write;
534 #endif /* CONFIG_CIFS_SMB2 */
537 static inline unsigned int
538 in_flight(struct TCP_Server_Info *server)
541 spin_lock(&server->req_lock);
542 num = server->in_flight;
543 spin_unlock(&server->req_lock);
548 has_credits(struct TCP_Server_Info *server, int *credits)
551 spin_lock(&server->req_lock);
553 spin_unlock(&server->req_lock);
558 add_credits(struct TCP_Server_Info *server, const unsigned int add,
561 server->ops->add_credits(server, add, optype);
565 set_credits(struct TCP_Server_Info *server, const int val)
567 server->ops->set_credits(server, val);
571 get_next_mid(struct TCP_Server_Info *server)
573 return server->ops->get_next_mid(server);
577 * When the server supports very large reads and writes via POSIX extensions,
578 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
579 * including the RFC1001 length.
581 * Note that this might make for "interesting" allocation problems during
582 * writeback however as we have to allocate an array of pointers for the
583 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
585 * For reads, there is a similar problem as we need to allocate an array
586 * of kvecs to handle the receive, though that should only need to be done
589 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
590 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
593 * When the server doesn't allow large posix writes, only allow a rsize/wsize
594 * of 2^17-1 minus the size of the call header. That allows for a read or
595 * write up to the maximum size described by RFC1002.
597 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
598 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
601 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
602 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
603 * a single wsize request with a single call.
605 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
608 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
609 * those values when posix extensions aren't in force. In actuality here, we
610 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
611 * to be ok with the extra byte even though Windows doesn't send writes that
616 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
618 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
619 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
622 * On hosts with high memory, we can't currently support wsize/rsize that are
623 * larger than we can kmap at once. Cap the rsize/wsize at
624 * LAST_PKMAP * PAGE_SIZE. We'll never be able to fill a read or write request
625 * larger than that anyway.
627 #ifdef CONFIG_HIGHMEM
628 #define CIFS_KMAP_SIZE_LIMIT (LAST_PKMAP * PAGE_CACHE_SIZE)
629 #else /* CONFIG_HIGHMEM */
630 #define CIFS_KMAP_SIZE_LIMIT (1<<24)
631 #endif /* CONFIG_HIGHMEM */
633 #ifdef CONFIG_HIGHMEM
635 * On arches that have high memory, kmap address space is limited. By
636 * serializing the kmap operations on those arches, we ensure that we don't
637 * end up with a bunch of threads in writeback with partially mapped page
638 * arrays, stuck waiting for kmap to come back. That situation prevents
639 * progress and can deadlock.
642 extern struct mutex cifs_kmap_mutex;
647 mutex_lock(&cifs_kmap_mutex);
651 cifs_kmap_unlock(void)
653 mutex_unlock(&cifs_kmap_mutex);
655 #else /* !CONFIG_HIGHMEM */
656 #define cifs_kmap_lock() do { ; } while (0)
657 #define cifs_kmap_unlock() do { ; } while (0)
658 #endif /* CONFIG_HIGHMEM */
661 * Macros to allow the TCP_Server_Info->net field and related code to drop out
662 * when CONFIG_NET_NS isn't set.
667 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
672 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
679 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
684 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
691 * Session structure. One of these for each uid session with a particular host
694 struct list_head smb_ses_list;
695 struct list_head tcon_list;
696 struct mutex session_mutex;
697 struct TCP_Server_Info *server; /* pointer to server info */
698 int ses_count; /* reference counter */
699 enum statusEnum status;
700 unsigned overrideSecFlg; /* if non-zero override global sec flags */
701 __u16 ipc_tid; /* special tid for connection to IPC share */
704 char *serverOS; /* name of operating system underlying server */
705 char *serverNOS; /* name of network operating system of server */
706 char *serverDomain; /* security realm of server */
707 __u64 Suid; /* remote smb uid */
708 uid_t linux_uid; /* overriding owner of files on the mount */
709 uid_t cred_uid; /* owner of credentials */
710 unsigned int capabilities;
711 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
712 TCP names - will ipv6 and sctp addresses fit? */
713 char *user_name; /* must not be null except during init of sess
714 and after mount option parsing we fill it */
717 struct session_key auth_key;
718 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
719 bool need_reconnect:1; /* connection reset, uid now invalid */
720 #ifdef CONFIG_CIFS_SMB2
722 #endif /* CONFIG_CIFS_SMB2 */
724 /* no more than one of the following three session flags may be set */
725 #define CIFS_SES_NT4 1
726 #define CIFS_SES_OS2 2
727 #define CIFS_SES_W9X 4
728 /* following flag is set for old servers such as OS2 (and Win95?)
729 which do not negotiate NTLM or POSIX dialects, but instead
730 negotiate one of the older LANMAN dialects */
731 #define CIFS_SES_LANMAN 8
734 cap_unix(struct cifs_ses *ses)
736 return ses->server->vals->cap_unix & ses->capabilities;
740 * there is one of these for each connection to a resource on a particular
744 struct list_head tcon_list;
746 struct list_head openFileList;
747 struct cifs_ses *ses; /* pointer to session associated with */
748 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
749 char *nativeFileSystem;
750 char *password; /* for share-level security */
751 __u32 tid; /* The 4 byte tree id */
752 __u16 Flags; /* optional support bits */
753 enum statusEnum tidStatus;
754 #ifdef CONFIG_CIFS_STATS
755 atomic_t num_smbs_sent;
760 atomic_t num_flushes;
761 atomic_t num_oplock_brks;
764 atomic_t num_deletes;
766 atomic_t num_posixopens;
767 atomic_t num_posixmkdirs;
769 atomic_t num_renames;
770 atomic_t num_t2renames;
774 atomic_t num_hardlinks;
775 atomic_t num_symlinks;
777 atomic_t num_acl_get;
778 atomic_t num_acl_set;
780 #ifdef CONFIG_CIFS_SMB2
782 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
783 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
785 #endif /* CONFIG_CIFS_SMB2 */
787 #ifdef CONFIG_CIFS_STATS2
788 unsigned long long time_writes;
789 unsigned long long time_reads;
790 unsigned long long time_opens;
791 unsigned long long time_deletes;
792 unsigned long long time_closes;
793 unsigned long long time_mkdirs;
794 unsigned long long time_rmdirs;
795 unsigned long long time_renames;
796 unsigned long long time_t2renames;
797 unsigned long long time_ffirst;
798 unsigned long long time_fnext;
799 unsigned long long time_fclose;
800 #endif /* CONFIG_CIFS_STATS2 */
803 spinlock_t stat_lock;
804 #endif /* CONFIG_CIFS_STATS */
805 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
806 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
807 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
808 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
811 bool seal:1; /* transport encryption for this mounted share */
812 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
813 for this mount even if server would support */
814 bool local_lease:1; /* check leases (only) on local system not remote */
815 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
816 bool need_reconnect:1; /* connection reset, tid now invalid */
817 #ifdef CONFIG_CIFS_SMB2
818 bool print:1; /* set if connection to printer share */
819 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
822 __u32 maximal_access;
823 __u32 vol_serial_number;
824 __le64 vol_create_time;
825 #endif /* CONFIG_CIFS_SMB2 */
826 #ifdef CONFIG_CIFS_FSCACHE
827 u64 resource_id; /* server resource id */
828 struct fscache_cookie *fscache; /* cookie for share */
830 /* BB add field for back pointer to sb struct(s)? */
834 * This is a refcounted and timestamped container for a tcon pointer. The
835 * container holds a tcon reference. It is considered safe to free one of
836 * these when the tl_count goes to 0. The tl_time is the time of the last
837 * "get" on the container.
840 struct rb_node tl_rbnode;
842 unsigned long tl_flags;
843 #define TCON_LINK_MASTER 0
844 #define TCON_LINK_PENDING 1
845 #define TCON_LINK_IN_TREE 2
846 unsigned long tl_time;
848 struct cifs_tcon *tl_tcon;
851 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
853 static inline struct cifs_tcon *
854 tlink_tcon(struct tcon_link *tlink)
856 return tlink->tl_tcon;
859 extern void cifs_put_tlink(struct tcon_link *tlink);
861 static inline struct tcon_link *
862 cifs_get_tlink(struct tcon_link *tlink)
864 if (tlink && !IS_ERR(tlink))
865 atomic_inc(&tlink->tl_count);
869 /* This function is always expected to succeed */
870 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
873 * This info hangs off the cifsFileInfo structure, pointed to by llist.
874 * This is used to track byte stream locks on the file
876 struct cifsLockInfo {
877 struct list_head llist; /* pointer to next cifsLockInfo */
878 struct list_head blist; /* pointer to locks blocked on this */
879 wait_queue_head_t block_q;
887 * One of these for each open instance of a file
889 struct cifs_search_info {
890 loff_t index_of_last_entry;
891 __u16 entries_in_buffer;
894 char *ntwrk_buf_start;
895 char *srch_entries_start;
897 const char *presume_name;
898 unsigned int resume_name_len;
902 bool smallBuf:1; /* so we know which buf_release function to call */
907 #ifdef CONFIG_CIFS_SMB2
908 __u64 persistent_fid; /* persist file id for smb2 */
909 __u64 volatile_fid; /* volatile file id for smb2 */
913 struct cifsFileInfo {
914 struct list_head tlist; /* pointer to next fid owned by tcon */
915 struct list_head flist; /* next fid (file instance) for this inode */
916 struct list_head llist; /*
917 * brlocks held by this fid, protected by
918 * lock_mutex from cifsInodeInfo structure
920 unsigned int uid; /* allows finding which FileInfo structure */
921 __u32 pid; /* process id who opened file */
922 struct cifs_fid fid; /* file id from remote */
923 /* BB add lock scope info here if needed */ ;
924 /* lock scope id (0 if none) */
925 struct dentry *dentry;
926 unsigned int f_flags;
927 struct tcon_link *tlink;
928 bool invalidHandle:1; /* file closed via session abend */
929 bool oplock_break_cancelled:1;
930 int count; /* refcount protected by cifs_file_list_lock */
931 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
932 struct cifs_search_info srch_inf;
933 struct work_struct oplock_break; /* work for oplock breaks */
936 struct cifs_io_parms {
938 #ifdef CONFIG_CIFS_SMB2
939 __u64 persistent_fid; /* persist file id for smb2 */
940 __u64 volatile_fid; /* volatile file id for smb2 */
945 struct cifs_tcon *tcon;
948 struct cifs_readdata;
950 /* asynchronous read support */
951 struct cifs_readdata {
952 struct kref refcount;
953 struct list_head list;
954 struct completion done;
955 struct cifsFileInfo *cfile;
956 struct address_space *mapping;
961 struct list_head pages;
962 struct work_struct work;
963 int (*marshal_iov) (struct cifs_readdata *rdata,
964 unsigned int remaining);
969 struct cifs_writedata;
971 /* asynchronous write support */
972 struct cifs_writedata {
973 struct kref refcount;
974 struct list_head list;
975 struct completion done;
976 enum writeback_sync_modes sync_mode;
977 struct work_struct work;
978 struct cifsFileInfo *cfile;
983 void (*marshal_iov) (struct kvec *iov,
984 struct cifs_writedata *wdata);
985 unsigned int nr_pages;
986 struct page *pages[1];
990 * Take a reference on the file private data. Must be called with
991 * cifs_file_list_lock held.
994 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
999 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
1000 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
1003 * One of these for each file inode
1006 struct cifsInodeInfo {
1007 bool can_cache_brlcks;
1008 struct mutex lock_mutex; /*
1009 * protect the field above and llist
1010 * from every cifsFileInfo structure
1013 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1014 struct list_head openFileList;
1015 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1016 bool clientCanCacheRead; /* read oplock */
1017 bool clientCanCacheAll; /* read and writebehind oplock */
1018 bool delete_pending; /* DELETE_ON_CLOSE is set */
1019 bool invalid_mapping; /* pagecache is invalid */
1020 unsigned long time; /* jiffies of last update of inode */
1021 u64 server_eof; /* current file size on server -- protected by i_lock */
1022 u64 uniqueid; /* server inode number */
1023 u64 createtime; /* creation time on server */
1024 #ifdef CONFIG_CIFS_FSCACHE
1025 struct fscache_cookie *fscache;
1027 struct inode vfs_inode;
1030 static inline struct cifsInodeInfo *
1031 CIFS_I(struct inode *inode)
1033 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1036 static inline struct cifs_sb_info *
1037 CIFS_SB(struct super_block *sb)
1039 return sb->s_fs_info;
1042 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1044 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1051 convert_delimiter(char *path, char delim)
1064 for (i = 0; path[i] != '\0'; i++) {
1065 if (path[i] == old_delim)
1070 static inline char *
1071 build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
1072 struct cifs_tcon *tcon)
1074 if (!vol->ops->build_path_to_root)
1076 return vol->ops->build_path_to_root(vol, cifs_sb, tcon);
1079 #ifdef CONFIG_CIFS_STATS
1080 #define cifs_stats_inc atomic_inc
1082 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1086 spin_lock(&tcon->stat_lock);
1087 tcon->bytes_written += bytes;
1088 spin_unlock(&tcon->stat_lock);
1092 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1095 spin_lock(&tcon->stat_lock);
1096 tcon->bytes_read += bytes;
1097 spin_unlock(&tcon->stat_lock);
1101 #define cifs_stats_inc(field) do {} while (0)
1102 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1103 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1109 * This is the prototype for the mid receive function. This function is for
1110 * receiving the rest of the SMB frame, starting with the WordCount (which is
1111 * just after the MID in struct smb_hdr). Note:
1113 * - This will be called by cifsd, with no locks held.
1114 * - The mid will still be on the pending_mid_q.
1115 * - mid->resp_buf will point to the current buffer.
1117 * Returns zero on a successful receive, or an error. The receive state in
1118 * the TCP_Server_Info will also be updated.
1120 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1121 struct mid_q_entry *mid);
1124 * This is the prototype for the mid callback function. This is called once the
1125 * mid has been received off of the socket. When creating one, take special
1126 * care to avoid deadlocks. Things to bear in mind:
1128 * - it will be called by cifsd, with no locks held
1129 * - the mid will be removed from any lists
1131 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1133 /* one of these for every pending CIFS request to the server */
1134 struct mid_q_entry {
1135 struct list_head qhead; /* mids waiting on reply from this server */
1136 struct TCP_Server_Info *server; /* server corresponding to this mid */
1137 __u64 mid; /* multiplex id */
1138 __u32 pid; /* process id */
1139 __u32 sequence_number; /* for CIFS signing */
1140 unsigned long when_alloc; /* when mid was created */
1141 #ifdef CONFIG_CIFS_STATS2
1142 unsigned long when_sent; /* time when smb send finished */
1143 unsigned long when_received; /* when demux complete (taken off wire) */
1145 mid_receive_t *receive; /* call receive callback */
1146 mid_callback_t *callback; /* call completion callback */
1147 void *callback_data; /* general purpose pointer for callback */
1148 void *resp_buf; /* pointer to received SMB header */
1149 int mid_state; /* wish this were enum but can not pass to wait_event */
1150 __le16 command; /* smb command code */
1151 bool large_buf:1; /* if valid response, is pointer to large buf */
1152 bool multiRsp:1; /* multiple trans2 responses for one request */
1153 bool multiEnd:1; /* both received */
1156 /* Make code in transport.c a little cleaner by moving
1157 update of optional stats into function below */
1158 #ifdef CONFIG_CIFS_STATS2
1160 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1162 atomic_inc(&server->in_send);
1165 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1167 atomic_dec(&server->in_send);
1170 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1172 atomic_inc(&server->num_waiters);
1175 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1177 atomic_dec(&server->num_waiters);
1180 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1182 mid->when_sent = jiffies;
1185 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1188 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1192 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1196 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1200 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1205 /* for pending dnotify requests */
1206 struct dir_notify_req {
1207 struct list_head lhead;
1214 __u32 filter; /* CompletionFilter (for multishot) */
1219 struct dfs_info3_param {
1220 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1229 * common struct for holding inode info when searching for or updating an
1230 * inode with new info
1233 #define CIFS_FATTR_DFS_REFERRAL 0x1
1234 #define CIFS_FATTR_DELETE_PENDING 0x2
1235 #define CIFS_FATTR_NEED_REVAL 0x4
1236 #define CIFS_FATTR_INO_COLLISION 0x8
1249 unsigned int cf_nlink;
1250 unsigned int cf_dtype;
1251 struct timespec cf_atime;
1252 struct timespec cf_mtime;
1253 struct timespec cf_ctime;
1256 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1259 kfree(param->path_name);
1260 kfree(param->node_name);
1265 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1266 int number_of_items)
1269 if ((number_of_items == 0) || (param == NULL))
1271 for (i = 0; i < number_of_items; i++) {
1272 kfree(param[i].path_name);
1273 kfree(param[i].node_name);
1279 #define MID_REQUEST_ALLOCATED 1
1280 #define MID_REQUEST_SUBMITTED 2
1281 #define MID_RESPONSE_RECEIVED 4
1282 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1283 #define MID_RESPONSE_MALFORMED 0x10
1284 #define MID_SHUTDOWN 0x20
1286 /* Types of response buffer returned from SendReceive2 */
1287 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1288 #define CIFS_SMALL_BUFFER 1
1289 #define CIFS_LARGE_BUFFER 2
1290 #define CIFS_IOVEC 4 /* array of response buffers */
1292 /* Type of Request to SendReceive2 */
1293 #define CIFS_BLOCKING_OP 1 /* operation can block */
1294 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1295 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1296 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1297 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1298 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1300 /* Type of request operation */
1301 #define CIFS_ECHO_OP 0x080 /* echo request */
1302 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1303 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1304 #define CIFS_OP_MASK 0x0380 /* mask request type */
1306 /* Security Flags: indicate type of session setup needed */
1307 #define CIFSSEC_MAY_SIGN 0x00001
1308 #define CIFSSEC_MAY_NTLM 0x00002
1309 #define CIFSSEC_MAY_NTLMV2 0x00004
1310 #define CIFSSEC_MAY_KRB5 0x00008
1311 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1312 #define CIFSSEC_MAY_LANMAN 0x00010
1313 #define CIFSSEC_MAY_PLNTXT 0x00020
1315 #define CIFSSEC_MAY_LANMAN 0
1316 #define CIFSSEC_MAY_PLNTXT 0
1317 #endif /* weak passwords */
1318 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1319 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1321 #define CIFSSEC_MUST_SIGN 0x01001
1322 /* note that only one of the following can be set so the
1323 result of setting MUST flags more than once will be to
1324 require use of the stronger protocol */
1325 #define CIFSSEC_MUST_NTLM 0x02002
1326 #define CIFSSEC_MUST_NTLMV2 0x04004
1327 #define CIFSSEC_MUST_KRB5 0x08008
1328 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1329 #define CIFSSEC_MUST_LANMAN 0x10010
1330 #define CIFSSEC_MUST_PLNTXT 0x20020
1331 #ifdef CONFIG_CIFS_UPCALL
1332 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1334 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1336 #else /* do not allow weak pw hash */
1337 #define CIFSSEC_MUST_LANMAN 0
1338 #define CIFSSEC_MUST_PLNTXT 0
1339 #ifdef CONFIG_CIFS_UPCALL
1340 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1342 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1344 #endif /* WEAK_PW_HASH */
1345 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1346 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1348 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
1349 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1350 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1352 *****************************************************************
1353 * All constants go here
1354 *****************************************************************
1357 #define UID_HASH (16)
1360 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1361 * following to be declared.
1364 /****************************************************************************
1365 * Locking notes. All updates to global variables and lists should be
1366 * protected by spinlocks or semaphores.
1370 * GlobalMid_Lock protects:
1371 * list operations on pending_mid_q and oplockQ
1372 * updates to XID counters, multiplex id and SMB sequence numbers
1373 * cifs_file_list_lock protects:
1374 * list operations on tcp and SMB session lists and tCon lists
1375 * f_owner.lock protects certain per file struct operations
1376 * mapping->page_lock protects certain per page operations
1380 * sesSem operations on smb session
1381 * tconSem operations on tree connection
1382 * fh_sem file handle reconnection operations
1384 ****************************************************************************/
1386 #ifdef DECLARE_GLOBALS_HERE
1387 #define GLOBAL_EXTERN
1389 #define GLOBAL_EXTERN extern
1393 * the list of TCP_Server_Info structures, ie each of the sockets
1394 * connecting our client to a distinct server (ip address), is
1395 * chained together by cifs_tcp_ses_list. The list of all our SMB
1396 * sessions (and from that the tree connections) can be found
1397 * by iterating over cifs_tcp_ses_list
1399 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1402 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1403 * tcp session, and the list of tcon's per smb session. It also protects
1404 * the reference counters for the server, smb session, and tcon. Finally,
1405 * changes to the tcon->tidStatus should be done while holding this lock.
1407 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1410 * This lock protects the cifs_file->llist and cifs_file->flist
1411 * list operations, and updates to some flags (cifs_file->invalidHandle)
1412 * It will be moved to either use the tcon->stat_lock or equivalent later.
1413 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1414 * the cifs_tcp_ses_lock must be grabbed first and released last.
1416 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1418 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1419 /* Outstanding dir notify requests */
1420 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1421 /* DirNotify response queue */
1422 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1423 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1426 * Global transaction id (XID) information
1428 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1429 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1430 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1431 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1432 /* on midQ entries */
1434 * Global counters, updated atomically
1436 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1437 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1438 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1439 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1440 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1442 /* Various Debug counters */
1443 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1444 #ifdef CONFIG_CIFS_STATS2
1445 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1446 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1448 GLOBAL_EXTERN atomic_t smBufAllocCount;
1449 GLOBAL_EXTERN atomic_t midCount;
1452 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1453 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1454 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1455 with more secure ntlmssp2 challenge/resp */
1456 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1457 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1458 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1459 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1460 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1461 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1463 #ifdef CONFIG_CIFS_ACL
1464 GLOBAL_EXTERN struct rb_root uidtree;
1465 GLOBAL_EXTERN struct rb_root gidtree;
1466 GLOBAL_EXTERN spinlock_t siduidlock;
1467 GLOBAL_EXTERN spinlock_t sidgidlock;
1468 GLOBAL_EXTERN struct rb_root siduidtree;
1469 GLOBAL_EXTERN struct rb_root sidgidtree;
1470 GLOBAL_EXTERN spinlock_t uidsidlock;
1471 GLOBAL_EXTERN spinlock_t gidsidlock;
1472 #endif /* CONFIG_CIFS_ACL */
1474 void cifs_oplock_break(struct work_struct *work);
1476 extern const struct slow_work_ops cifs_oplock_break_ops;
1477 extern struct workqueue_struct *cifsiod_wq;
1479 extern mempool_t *cifs_mid_poolp;
1481 /* Operations for different SMB versions */
1482 #define SMB1_VERSION_STRING "1.0"
1483 extern struct smb_version_operations smb1_operations;
1484 extern struct smb_version_values smb1_values;
1485 #define SMB21_VERSION_STRING "2.1"
1486 extern struct smb_version_operations smb21_operations;
1487 extern struct smb_version_values smb21_values;
1488 #endif /* _CIFS_GLOB_H */