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;
182 struct smb_version_operations {
183 int (*send_cancel)(struct TCP_Server_Info *, void *,
184 struct mid_q_entry *);
185 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
186 /* setup request: allocate mid, sign message */
187 int (*setup_request)(struct cifs_ses *, struct kvec *, unsigned int,
188 struct mid_q_entry **);
189 /* setup async request: allocate mid, sign message */
190 int (*setup_async_request)(struct TCP_Server_Info *, struct kvec *,
191 unsigned int, struct mid_q_entry **);
192 /* check response: verify signature, map error */
193 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
195 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
197 void (*set_credits)(struct TCP_Server_Info *, const int);
198 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
199 unsigned int (*get_credits)(struct mid_q_entry *);
200 __u64 (*get_next_mid)(struct TCP_Server_Info *);
201 /* data offset from read response message */
202 unsigned int (*read_data_offset)(char *);
203 /* data length from read response message */
204 unsigned int (*read_data_length)(char *);
205 /* map smb to linux error */
206 int (*map_error)(char *, bool);
207 /* find mid corresponding to the response message */
208 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
209 void (*dump_detail)(void *);
210 void (*clear_stats)(struct cifs_tcon *);
211 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
212 /* verify the message */
213 int (*check_message)(char *, unsigned int);
214 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
215 /* process transaction2 response */
216 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
218 /* check if we need to negotiate */
219 bool (*need_neg)(struct TCP_Server_Info *);
220 /* negotiate to the server */
221 int (*negotiate)(const unsigned int, struct cifs_ses *);
222 /* set negotiated write size */
223 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
224 /* set negotiated read size */
225 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
226 /* setup smb sessionn */
227 int (*sess_setup)(const unsigned int, struct cifs_ses *,
228 const struct nls_table *);
229 /* close smb session */
230 int (*logoff)(const unsigned int, struct cifs_ses *);
231 /* connect to a server share */
232 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
233 struct cifs_tcon *, const struct nls_table *);
234 /* close tree connecion */
235 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
236 /* get DFS referrals */
237 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
238 const char *, struct dfs_info3_param **,
239 unsigned int *, const struct nls_table *, int);
240 /* informational QFS call */
241 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
242 /* check if a path is accessible or not */
243 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
244 struct cifs_sb_info *, const char *);
245 /* query path data from the server */
246 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
247 struct cifs_sb_info *, const char *,
248 FILE_ALL_INFO *, bool *);
249 /* query file data from the server */
250 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
251 struct cifs_fid *, FILE_ALL_INFO *);
252 /* get server index number */
253 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
254 struct cifs_sb_info *, const char *,
255 u64 *uniqueid, FILE_ALL_INFO *);
256 /* set size by path */
257 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
258 const char *, __u64, struct cifs_sb_info *, bool);
259 /* set size by file handle */
260 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
261 struct cifsFileInfo *, __u64, bool);
263 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
265 /* build a full path to the root of the mount */
266 char * (*build_path_to_root)(struct smb_vol *, struct cifs_sb_info *,
268 /* check if we can send an echo or nor */
269 bool (*can_echo)(struct TCP_Server_Info *);
270 /* send echo request */
271 int (*echo)(struct TCP_Server_Info *);
272 /* create directory */
273 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
274 struct cifs_sb_info *);
275 /* set info on created directory */
276 void (*mkdir_setinfo)(struct inode *, const char *,
277 struct cifs_sb_info *, struct cifs_tcon *,
279 /* remove directory */
280 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
281 struct cifs_sb_info *);
283 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
284 struct cifs_sb_info *);
285 /* open, rename and delete file */
286 int (*rename_pending_delete)(const char *, struct dentry *,
288 /* send rename request */
289 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
290 const char *, struct cifs_sb_info *);
291 /* send create hardlink request */
292 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
293 const char *, const char *,
294 struct cifs_sb_info *);
295 /* open a file for non-posix mounts */
296 int (*open)(const unsigned int, struct cifs_tcon *, const char *, int,
297 int, int, struct cifs_fid *, __u32 *, FILE_ALL_INFO *,
298 struct cifs_sb_info *);
299 /* set fid protocol-specific info */
300 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
302 int (*close)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
303 /* send a flush request to the server */
304 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
305 /* async read from the server */
306 int (*async_readv)(struct cifs_readdata *);
307 /* async write to the server */
308 int (*async_writev)(struct cifs_writedata *);
309 /* sync read from the server */
310 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
311 struct cifs_io_parms *, unsigned int *, char **,
313 /* sync write to the server */
314 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
315 struct cifs_io_parms *, unsigned int *, struct kvec *,
317 /* open dir, start readdir */
318 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
319 const char *, struct cifs_sb_info *,
320 struct cifs_fid *, __u16,
321 struct cifs_search_info *);
322 /* continue readdir */
323 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
325 __u16, struct cifs_search_info *srch_inf);
327 int (*close_dir)(const unsigned int, struct cifs_tcon *,
329 /* calculate a size of SMB message */
330 unsigned int (*calc_smb_size)(void *);
331 /* check for STATUS_PENDING and process it in a positive case */
332 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
335 struct smb_version_values {
336 char *version_string;
337 __u32 large_lock_type;
338 __u32 exclusive_lock_type;
339 __u32 shared_lock_type;
340 __u32 unlock_lock_type;
342 size_t max_header_size;
343 size_t read_rsp_size;
345 unsigned int cap_unix;
346 unsigned int cap_nt_find;
347 unsigned int cap_large_files;
350 #define HEADER_SIZE(server) (server->vals->header_size)
351 #define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
359 char *iocharset; /* local code page for mapping to and from Unicode */
360 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
361 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
377 bool no_psx_acl:1; /* set if posix acl support should be disabled */
379 bool backupuid_specified; /* mount option backupuid is specified */
380 bool backupgid_specified; /* mount option backupgid is specified */
381 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
382 bool server_ino:1; /* use inode numbers from server ie UniqueId */
384 bool strict_io:1; /* strict cache behavior */
385 bool remap:1; /* set to remap seven reserved chars in filenames */
386 bool posix_paths:1; /* unset to not ask for posix pathnames. */
389 bool nullauth:1; /* attempt to authenticate with null user */
390 bool nocase:1; /* request case insensitive filenames */
391 bool nobrl:1; /* disable sending byte range locks to srv */
392 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
393 bool seal:1; /* request transport encryption on share */
394 bool nodfs:1; /* Do not request DFS, even if available */
395 bool local_lease:1; /* check leases only on local system, not remote */
398 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
399 bool fsc:1; /* enable fscache */
400 bool mfsymlinks:1; /* use Minshall+French Symlinks */
402 bool rwpidforward:1; /* pid forward for read/write operations */
405 bool sockopt_tcp_nodelay:1;
406 unsigned short int port;
407 unsigned long actimeo; /* attribute cache timeout (jiffies) */
408 struct smb_version_operations *ops;
409 struct smb_version_values *vals;
411 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
412 struct nls_table *local_nls;
415 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
416 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
417 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
418 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
419 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
420 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
421 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
422 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
423 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
424 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
426 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
427 MS_NODEV | MS_SYNCHRONOUS)
429 struct cifs_mnt_data {
430 struct cifs_sb_info *cifs_sb;
435 static inline unsigned int
436 get_rfc1002_length(void *buf)
438 return be32_to_cpu(*((__be32 *)buf));
442 inc_rfc1001_len(void *buf, int count)
444 be32_add_cpu((__be32 *)buf, count);
447 struct TCP_Server_Info {
448 struct list_head tcp_ses_list;
449 struct list_head smb_ses_list;
450 int srv_count; /* reference counter */
451 /* 15 character server name + 0x20 16th byte indicating type = srv */
452 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
453 struct smb_version_operations *ops;
454 struct smb_version_values *vals;
455 enum statusEnum tcpStatus; /* what we think the status is */
456 char *hostname; /* hostname portion of UNC string */
457 struct socket *ssocket;
458 struct sockaddr_storage dstaddr;
459 struct sockaddr_storage srcaddr; /* locally bind to this IP */
463 wait_queue_head_t response_q;
464 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
465 struct list_head pending_mid_q;
466 bool noblocksnd; /* use blocking sendmsg */
467 bool noautotune; /* do not autotune send buf sizes */
469 int credits; /* send no more requests at once */
470 unsigned int in_flight; /* number of requests on the wire to server */
471 spinlock_t req_lock; /* protect the two values above */
472 struct mutex srv_mutex;
473 struct task_struct *tsk;
474 char server_GUID[16];
476 bool session_estab; /* mark when very first sess is established */
477 #ifdef CONFIG_CIFS_SMB2
478 int echo_credits; /* echo reserved slots */
479 int oplock_credits; /* oplock break reserved slots */
480 bool echoes:1; /* enable echoes */
482 u16 dialect; /* dialect index that server chose */
483 enum securityEnum secType;
484 bool oplocks:1; /* enable oplocks */
485 unsigned int maxReq; /* Clients should submit no more */
486 /* than maxReq distinct unanswered SMBs to the server when using */
487 /* multiplexed reads or writes */
488 unsigned int maxBuf; /* maxBuf specifies the maximum */
489 /* message size the server can send or receive for non-raw SMBs */
490 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
491 /* when socket is setup (and during reconnect) before NegProt sent */
492 unsigned int max_rw; /* maxRw specifies the maximum */
493 /* message size the server can send or receive for */
494 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
495 unsigned int max_vcs; /* maximum number of smb sessions, at least
496 those that can be specified uniquely with
498 unsigned int capabilities; /* selective disabling of caps by smb sess */
499 int timeAdj; /* Adjust for difference in server time zone in sec */
500 __u64 CurrentMid; /* multiplex id - rotating counter */
501 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
502 /* 16th byte of RFC1001 workstation name is always null */
503 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
504 __u32 sequence_number; /* for signing, protected by srv_mutex */
505 struct session_key session_key;
506 unsigned long lstrp; /* when we got last response from this server */
507 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
508 /* extended security flavors that server supports */
509 bool sec_ntlmssp; /* supports NTLMSSP */
510 bool sec_kerberosu2u; /* supports U2U Kerberos */
511 bool sec_kerberos; /* supports plain Kerberos */
512 bool sec_mskerberos; /* supports legacy MS Kerberos */
513 bool large_buf; /* is current buffer large? */
514 struct delayed_work echo; /* echo ping workqueue job */
515 struct kvec *iov; /* reusable kvec array for receives */
516 unsigned int nr_iov; /* number of kvecs in array */
517 char *smallbuf; /* pointer to current "small" buffer */
518 char *bigbuf; /* pointer to current "big" buffer */
519 unsigned int total_read; /* total amount of data read in this pass */
520 #ifdef CONFIG_CIFS_FSCACHE
521 struct fscache_cookie *fscache; /* client index cache cookie */
523 #ifdef CONFIG_CIFS_STATS2
524 atomic_t in_send; /* requests trying to send */
525 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
527 #ifdef CONFIG_CIFS_SMB2
528 unsigned int max_read;
529 unsigned int max_write;
530 #endif /* CONFIG_CIFS_SMB2 */
533 static inline unsigned int
534 in_flight(struct TCP_Server_Info *server)
537 spin_lock(&server->req_lock);
538 num = server->in_flight;
539 spin_unlock(&server->req_lock);
544 has_credits(struct TCP_Server_Info *server, int *credits)
547 spin_lock(&server->req_lock);
549 spin_unlock(&server->req_lock);
554 add_credits(struct TCP_Server_Info *server, const unsigned int add,
557 server->ops->add_credits(server, add, optype);
561 set_credits(struct TCP_Server_Info *server, const int val)
563 server->ops->set_credits(server, val);
567 get_next_mid(struct TCP_Server_Info *server)
569 return server->ops->get_next_mid(server);
573 * When the server supports very large reads and writes via POSIX extensions,
574 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
575 * including the RFC1001 length.
577 * Note that this might make for "interesting" allocation problems during
578 * writeback however as we have to allocate an array of pointers for the
579 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
581 * For reads, there is a similar problem as we need to allocate an array
582 * of kvecs to handle the receive, though that should only need to be done
585 #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
586 #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
589 * When the server doesn't allow large posix writes, only allow a rsize/wsize
590 * of 2^17-1 minus the size of the call header. That allows for a read or
591 * write up to the maximum size described by RFC1002.
593 #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
594 #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
597 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
598 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
599 * a single wsize request with a single call.
601 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
604 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
605 * those values when posix extensions aren't in force. In actuality here, we
606 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
607 * to be ok with the extra byte even though Windows doesn't send writes that
612 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
614 #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
615 #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
618 * On hosts with high memory, we can't currently support wsize/rsize that are
619 * larger than we can kmap at once. Cap the rsize/wsize at
620 * LAST_PKMAP * PAGE_SIZE. We'll never be able to fill a read or write request
621 * larger than that anyway.
623 #ifdef CONFIG_HIGHMEM
624 #define CIFS_KMAP_SIZE_LIMIT (LAST_PKMAP * PAGE_CACHE_SIZE)
625 #else /* CONFIG_HIGHMEM */
626 #define CIFS_KMAP_SIZE_LIMIT (1<<24)
627 #endif /* CONFIG_HIGHMEM */
629 #ifdef CONFIG_HIGHMEM
631 * On arches that have high memory, kmap address space is limited. By
632 * serializing the kmap operations on those arches, we ensure that we don't
633 * end up with a bunch of threads in writeback with partially mapped page
634 * arrays, stuck waiting for kmap to come back. That situation prevents
635 * progress and can deadlock.
638 extern struct mutex cifs_kmap_mutex;
643 mutex_lock(&cifs_kmap_mutex);
647 cifs_kmap_unlock(void)
649 mutex_unlock(&cifs_kmap_mutex);
651 #else /* !CONFIG_HIGHMEM */
652 #define cifs_kmap_lock() do { ; } while (0)
653 #define cifs_kmap_unlock() do { ; } while (0)
654 #endif /* CONFIG_HIGHMEM */
657 * Macros to allow the TCP_Server_Info->net field and related code to drop out
658 * when CONFIG_NET_NS isn't set.
663 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
668 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
675 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
680 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
687 * Session structure. One of these for each uid session with a particular host
690 struct list_head smb_ses_list;
691 struct list_head tcon_list;
692 struct mutex session_mutex;
693 struct TCP_Server_Info *server; /* pointer to server info */
694 int ses_count; /* reference counter */
695 enum statusEnum status;
696 unsigned overrideSecFlg; /* if non-zero override global sec flags */
697 __u16 ipc_tid; /* special tid for connection to IPC share */
700 char *serverOS; /* name of operating system underlying server */
701 char *serverNOS; /* name of network operating system of server */
702 char *serverDomain; /* security realm of server */
703 __u64 Suid; /* remote smb uid */
704 uid_t linux_uid; /* overriding owner of files on the mount */
705 uid_t cred_uid; /* owner of credentials */
706 unsigned int capabilities;
707 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
708 TCP names - will ipv6 and sctp addresses fit? */
709 char *user_name; /* must not be null except during init of sess
710 and after mount option parsing we fill it */
713 struct session_key auth_key;
714 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
715 bool need_reconnect:1; /* connection reset, uid now invalid */
716 #ifdef CONFIG_CIFS_SMB2
718 #endif /* CONFIG_CIFS_SMB2 */
720 /* no more than one of the following three session flags may be set */
721 #define CIFS_SES_NT4 1
722 #define CIFS_SES_OS2 2
723 #define CIFS_SES_W9X 4
724 /* following flag is set for old servers such as OS2 (and Win95?)
725 which do not negotiate NTLM or POSIX dialects, but instead
726 negotiate one of the older LANMAN dialects */
727 #define CIFS_SES_LANMAN 8
730 cap_unix(struct cifs_ses *ses)
732 return ses->server->vals->cap_unix & ses->capabilities;
736 * there is one of these for each connection to a resource on a particular
740 struct list_head tcon_list;
742 struct list_head openFileList;
743 struct cifs_ses *ses; /* pointer to session associated with */
744 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
745 char *nativeFileSystem;
746 char *password; /* for share-level security */
747 __u32 tid; /* The 4 byte tree id */
748 __u16 Flags; /* optional support bits */
749 enum statusEnum tidStatus;
750 #ifdef CONFIG_CIFS_STATS
751 atomic_t num_smbs_sent;
756 atomic_t num_flushes;
757 atomic_t num_oplock_brks;
760 atomic_t num_deletes;
762 atomic_t num_posixopens;
763 atomic_t num_posixmkdirs;
765 atomic_t num_renames;
766 atomic_t num_t2renames;
770 atomic_t num_hardlinks;
771 atomic_t num_symlinks;
773 atomic_t num_acl_get;
774 atomic_t num_acl_set;
776 #ifdef CONFIG_CIFS_SMB2
778 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
779 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
781 #endif /* CONFIG_CIFS_SMB2 */
783 #ifdef CONFIG_CIFS_STATS2
784 unsigned long long time_writes;
785 unsigned long long time_reads;
786 unsigned long long time_opens;
787 unsigned long long time_deletes;
788 unsigned long long time_closes;
789 unsigned long long time_mkdirs;
790 unsigned long long time_rmdirs;
791 unsigned long long time_renames;
792 unsigned long long time_t2renames;
793 unsigned long long time_ffirst;
794 unsigned long long time_fnext;
795 unsigned long long time_fclose;
796 #endif /* CONFIG_CIFS_STATS2 */
799 spinlock_t stat_lock;
800 #endif /* CONFIG_CIFS_STATS */
801 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
802 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
803 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
804 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
807 bool seal:1; /* transport encryption for this mounted share */
808 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
809 for this mount even if server would support */
810 bool local_lease:1; /* check leases (only) on local system not remote */
811 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
812 bool need_reconnect:1; /* connection reset, tid now invalid */
813 #ifdef CONFIG_CIFS_SMB2
814 bool print:1; /* set if connection to printer share */
815 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
818 __u32 maximal_access;
819 __u32 vol_serial_number;
820 __le64 vol_create_time;
821 #endif /* CONFIG_CIFS_SMB2 */
822 #ifdef CONFIG_CIFS_FSCACHE
823 u64 resource_id; /* server resource id */
824 struct fscache_cookie *fscache; /* cookie for share */
826 /* BB add field for back pointer to sb struct(s)? */
830 * This is a refcounted and timestamped container for a tcon pointer. The
831 * container holds a tcon reference. It is considered safe to free one of
832 * these when the tl_count goes to 0. The tl_time is the time of the last
833 * "get" on the container.
836 struct rb_node tl_rbnode;
838 unsigned long tl_flags;
839 #define TCON_LINK_MASTER 0
840 #define TCON_LINK_PENDING 1
841 #define TCON_LINK_IN_TREE 2
842 unsigned long tl_time;
844 struct cifs_tcon *tl_tcon;
847 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
849 static inline struct cifs_tcon *
850 tlink_tcon(struct tcon_link *tlink)
852 return tlink->tl_tcon;
855 extern void cifs_put_tlink(struct tcon_link *tlink);
857 static inline struct tcon_link *
858 cifs_get_tlink(struct tcon_link *tlink)
860 if (tlink && !IS_ERR(tlink))
861 atomic_inc(&tlink->tl_count);
865 /* This function is always expected to succeed */
866 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
869 * This info hangs off the cifsFileInfo structure, pointed to by llist.
870 * This is used to track byte stream locks on the file
872 struct cifsLockInfo {
873 struct list_head llist; /* pointer to next cifsLockInfo */
874 struct list_head blist; /* pointer to locks blocked on this */
875 wait_queue_head_t block_q;
883 * One of these for each open instance of a file
885 struct cifs_search_info {
886 loff_t index_of_last_entry;
887 __u16 entries_in_buffer;
890 char *ntwrk_buf_start;
891 char *srch_entries_start;
893 const char *presume_name;
894 unsigned int resume_name_len;
898 bool smallBuf:1; /* so we know which buf_release function to call */
903 #ifdef CONFIG_CIFS_SMB2
904 __u64 persistent_fid; /* persist file id for smb2 */
905 __u64 volatile_fid; /* volatile file id for smb2 */
909 struct cifsFileInfo {
910 struct list_head tlist; /* pointer to next fid owned by tcon */
911 struct list_head flist; /* next fid (file instance) for this inode */
912 struct list_head llist; /*
913 * brlocks held by this fid, protected by
914 * lock_mutex from cifsInodeInfo structure
916 unsigned int uid; /* allows finding which FileInfo structure */
917 __u32 pid; /* process id who opened file */
918 struct cifs_fid fid; /* file id from remote */
919 /* BB add lock scope info here if needed */ ;
920 /* lock scope id (0 if none) */
921 struct dentry *dentry;
922 unsigned int f_flags;
923 struct tcon_link *tlink;
924 bool invalidHandle:1; /* file closed via session abend */
925 bool oplock_break_cancelled:1;
926 int count; /* refcount protected by cifs_file_list_lock */
927 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
928 struct cifs_search_info srch_inf;
929 struct work_struct oplock_break; /* work for oplock breaks */
932 struct cifs_io_parms {
934 #ifdef CONFIG_CIFS_SMB2
935 __u64 persistent_fid; /* persist file id for smb2 */
936 __u64 volatile_fid; /* volatile file id for smb2 */
941 struct cifs_tcon *tcon;
944 struct cifs_readdata;
946 /* asynchronous read support */
947 struct cifs_readdata {
948 struct kref refcount;
949 struct list_head list;
950 struct completion done;
951 struct cifsFileInfo *cfile;
952 struct address_space *mapping;
957 struct list_head pages;
958 struct work_struct work;
959 int (*marshal_iov) (struct cifs_readdata *rdata,
960 unsigned int remaining);
965 struct cifs_writedata;
967 /* asynchronous write support */
968 struct cifs_writedata {
969 struct kref refcount;
970 struct list_head list;
971 struct completion done;
972 enum writeback_sync_modes sync_mode;
973 struct work_struct work;
974 struct cifsFileInfo *cfile;
979 void (*marshal_iov) (struct kvec *iov,
980 struct cifs_writedata *wdata);
981 unsigned int nr_pages;
982 struct page *pages[1];
986 * Take a reference on the file private data. Must be called with
987 * cifs_file_list_lock held.
990 cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
995 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
996 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
999 * One of these for each file inode
1002 struct cifsInodeInfo {
1003 bool can_cache_brlcks;
1004 struct mutex lock_mutex; /*
1005 * protect the field above and llist
1006 * from every cifsFileInfo structure
1009 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1010 struct list_head openFileList;
1011 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1012 bool clientCanCacheRead; /* read oplock */
1013 bool clientCanCacheAll; /* read and writebehind oplock */
1014 bool delete_pending; /* DELETE_ON_CLOSE is set */
1015 bool invalid_mapping; /* pagecache is invalid */
1016 unsigned long time; /* jiffies of last update of inode */
1017 u64 server_eof; /* current file size on server -- protected by i_lock */
1018 u64 uniqueid; /* server inode number */
1019 u64 createtime; /* creation time on server */
1020 #ifdef CONFIG_CIFS_FSCACHE
1021 struct fscache_cookie *fscache;
1023 struct inode vfs_inode;
1026 static inline struct cifsInodeInfo *
1027 CIFS_I(struct inode *inode)
1029 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1032 static inline struct cifs_sb_info *
1033 CIFS_SB(struct super_block *sb)
1035 return sb->s_fs_info;
1038 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
1040 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1047 convert_delimiter(char *path, char delim)
1060 for (i = 0; path[i] != '\0'; i++) {
1061 if (path[i] == old_delim)
1066 static inline char *
1067 build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
1068 struct cifs_tcon *tcon)
1070 if (!vol->ops->build_path_to_root)
1072 return vol->ops->build_path_to_root(vol, cifs_sb, tcon);
1075 #ifdef CONFIG_CIFS_STATS
1076 #define cifs_stats_inc atomic_inc
1078 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
1082 spin_lock(&tcon->stat_lock);
1083 tcon->bytes_written += bytes;
1084 spin_unlock(&tcon->stat_lock);
1088 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
1091 spin_lock(&tcon->stat_lock);
1092 tcon->bytes_read += bytes;
1093 spin_unlock(&tcon->stat_lock);
1097 #define cifs_stats_inc(field) do {} while (0)
1098 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1099 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
1105 * This is the prototype for the mid receive function. This function is for
1106 * receiving the rest of the SMB frame, starting with the WordCount (which is
1107 * just after the MID in struct smb_hdr). Note:
1109 * - This will be called by cifsd, with no locks held.
1110 * - The mid will still be on the pending_mid_q.
1111 * - mid->resp_buf will point to the current buffer.
1113 * Returns zero on a successful receive, or an error. The receive state in
1114 * the TCP_Server_Info will also be updated.
1116 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1117 struct mid_q_entry *mid);
1120 * This is the prototype for the mid callback function. This is called once the
1121 * mid has been received off of the socket. When creating one, take special
1122 * care to avoid deadlocks. Things to bear in mind:
1124 * - it will be called by cifsd, with no locks held
1125 * - the mid will be removed from any lists
1127 typedef void (mid_callback_t)(struct mid_q_entry *mid);
1129 /* one of these for every pending CIFS request to the server */
1130 struct mid_q_entry {
1131 struct list_head qhead; /* mids waiting on reply from this server */
1132 struct TCP_Server_Info *server; /* server corresponding to this mid */
1133 __u64 mid; /* multiplex id */
1134 __u32 pid; /* process id */
1135 __u32 sequence_number; /* for CIFS signing */
1136 unsigned long when_alloc; /* when mid was created */
1137 #ifdef CONFIG_CIFS_STATS2
1138 unsigned long when_sent; /* time when smb send finished */
1139 unsigned long when_received; /* when demux complete (taken off wire) */
1141 mid_receive_t *receive; /* call receive callback */
1142 mid_callback_t *callback; /* call completion callback */
1143 void *callback_data; /* general purpose pointer for callback */
1144 void *resp_buf; /* pointer to received SMB header */
1145 int mid_state; /* wish this were enum but can not pass to wait_event */
1146 __le16 command; /* smb command code */
1147 bool large_buf:1; /* if valid response, is pointer to large buf */
1148 bool multiRsp:1; /* multiple trans2 responses for one request */
1149 bool multiEnd:1; /* both received */
1152 /* Make code in transport.c a little cleaner by moving
1153 update of optional stats into function below */
1154 #ifdef CONFIG_CIFS_STATS2
1156 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1158 atomic_inc(&server->in_send);
1161 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1163 atomic_dec(&server->in_send);
1166 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1168 atomic_inc(&server->num_waiters);
1171 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1173 atomic_dec(&server->num_waiters);
1176 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1178 mid->when_sent = jiffies;
1181 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1184 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1188 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1192 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1196 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1201 /* for pending dnotify requests */
1202 struct dir_notify_req {
1203 struct list_head lhead;
1210 __u32 filter; /* CompletionFilter (for multishot) */
1215 struct dfs_info3_param {
1216 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
1225 * common struct for holding inode info when searching for or updating an
1226 * inode with new info
1229 #define CIFS_FATTR_DFS_REFERRAL 0x1
1230 #define CIFS_FATTR_DELETE_PENDING 0x2
1231 #define CIFS_FATTR_NEED_REVAL 0x4
1232 #define CIFS_FATTR_INO_COLLISION 0x8
1245 unsigned int cf_nlink;
1246 unsigned int cf_dtype;
1247 struct timespec cf_atime;
1248 struct timespec cf_mtime;
1249 struct timespec cf_ctime;
1252 static inline void free_dfs_info_param(struct dfs_info3_param *param)
1255 kfree(param->path_name);
1256 kfree(param->node_name);
1261 static inline void free_dfs_info_array(struct dfs_info3_param *param,
1262 int number_of_items)
1265 if ((number_of_items == 0) || (param == NULL))
1267 for (i = 0; i < number_of_items; i++) {
1268 kfree(param[i].path_name);
1269 kfree(param[i].node_name);
1275 #define MID_REQUEST_ALLOCATED 1
1276 #define MID_REQUEST_SUBMITTED 2
1277 #define MID_RESPONSE_RECEIVED 4
1278 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
1279 #define MID_RESPONSE_MALFORMED 0x10
1280 #define MID_SHUTDOWN 0x20
1282 /* Types of response buffer returned from SendReceive2 */
1283 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1284 #define CIFS_SMALL_BUFFER 1
1285 #define CIFS_LARGE_BUFFER 2
1286 #define CIFS_IOVEC 4 /* array of response buffers */
1288 /* Type of Request to SendReceive2 */
1289 #define CIFS_BLOCKING_OP 1 /* operation can block */
1290 #define CIFS_ASYNC_OP 2 /* do not wait for response */
1291 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
1292 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1293 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1294 #define CIFS_NO_RESP 0x040 /* no response buffer required */
1296 /* Type of request operation */
1297 #define CIFS_ECHO_OP 0x080 /* echo request */
1298 #define CIFS_OBREAK_OP 0x0100 /* oplock break request */
1299 #define CIFS_NEG_OP 0x0200 /* negotiate request */
1300 #define CIFS_OP_MASK 0x0380 /* mask request type */
1302 /* Security Flags: indicate type of session setup needed */
1303 #define CIFSSEC_MAY_SIGN 0x00001
1304 #define CIFSSEC_MAY_NTLM 0x00002
1305 #define CIFSSEC_MAY_NTLMV2 0x00004
1306 #define CIFSSEC_MAY_KRB5 0x00008
1307 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1308 #define CIFSSEC_MAY_LANMAN 0x00010
1309 #define CIFSSEC_MAY_PLNTXT 0x00020
1311 #define CIFSSEC_MAY_LANMAN 0
1312 #define CIFSSEC_MAY_PLNTXT 0
1313 #endif /* weak passwords */
1314 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
1315 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
1317 #define CIFSSEC_MUST_SIGN 0x01001
1318 /* note that only one of the following can be set so the
1319 result of setting MUST flags more than once will be to
1320 require use of the stronger protocol */
1321 #define CIFSSEC_MUST_NTLM 0x02002
1322 #define CIFSSEC_MUST_NTLMV2 0x04004
1323 #define CIFSSEC_MUST_KRB5 0x08008
1324 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1325 #define CIFSSEC_MUST_LANMAN 0x10010
1326 #define CIFSSEC_MUST_PLNTXT 0x20020
1327 #ifdef CONFIG_CIFS_UPCALL
1328 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
1330 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
1332 #else /* do not allow weak pw hash */
1333 #define CIFSSEC_MUST_LANMAN 0
1334 #define CIFSSEC_MUST_PLNTXT 0
1335 #ifdef CONFIG_CIFS_UPCALL
1336 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
1338 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
1340 #endif /* WEAK_PW_HASH */
1341 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
1342 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
1344 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
1345 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
1346 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1348 *****************************************************************
1349 * All constants go here
1350 *****************************************************************
1353 #define UID_HASH (16)
1356 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1357 * following to be declared.
1360 /****************************************************************************
1361 * Locking notes. All updates to global variables and lists should be
1362 * protected by spinlocks or semaphores.
1366 * GlobalMid_Lock protects:
1367 * list operations on pending_mid_q and oplockQ
1368 * updates to XID counters, multiplex id and SMB sequence numbers
1369 * cifs_file_list_lock protects:
1370 * list operations on tcp and SMB session lists and tCon lists
1371 * f_owner.lock protects certain per file struct operations
1372 * mapping->page_lock protects certain per page operations
1376 * sesSem operations on smb session
1377 * tconSem operations on tree connection
1378 * fh_sem file handle reconnection operations
1380 ****************************************************************************/
1382 #ifdef DECLARE_GLOBALS_HERE
1383 #define GLOBAL_EXTERN
1385 #define GLOBAL_EXTERN extern
1389 * the list of TCP_Server_Info structures, ie each of the sockets
1390 * connecting our client to a distinct server (ip address), is
1391 * chained together by cifs_tcp_ses_list. The list of all our SMB
1392 * sessions (and from that the tree connections) can be found
1393 * by iterating over cifs_tcp_ses_list
1395 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1398 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1399 * tcp session, and the list of tcon's per smb session. It also protects
1400 * the reference counters for the server, smb session, and tcon. Finally,
1401 * changes to the tcon->tidStatus should be done while holding this lock.
1403 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
1406 * This lock protects the cifs_file->llist and cifs_file->flist
1407 * list operations, and updates to some flags (cifs_file->invalidHandle)
1408 * It will be moved to either use the tcon->stat_lock or equivalent later.
1409 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1410 * the cifs_tcp_ses_lock must be grabbed first and released last.
1412 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
1414 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
1415 /* Outstanding dir notify requests */
1416 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1417 /* DirNotify response queue */
1418 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
1419 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
1422 * Global transaction id (XID) information
1424 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
1425 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1426 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
1427 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1428 /* on midQ entries */
1430 * Global counters, updated atomically
1432 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1433 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1434 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1435 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1436 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1438 /* Various Debug counters */
1439 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1440 #ifdef CONFIG_CIFS_STATS2
1441 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1442 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1444 GLOBAL_EXTERN atomic_t smBufAllocCount;
1445 GLOBAL_EXTERN atomic_t midCount;
1448 GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
1449 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1450 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1451 with more secure ntlmssp2 challenge/resp */
1452 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1453 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1454 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1455 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1456 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1457 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1459 #ifdef CONFIG_CIFS_ACL
1460 GLOBAL_EXTERN struct rb_root uidtree;
1461 GLOBAL_EXTERN struct rb_root gidtree;
1462 GLOBAL_EXTERN spinlock_t siduidlock;
1463 GLOBAL_EXTERN spinlock_t sidgidlock;
1464 GLOBAL_EXTERN struct rb_root siduidtree;
1465 GLOBAL_EXTERN struct rb_root sidgidtree;
1466 GLOBAL_EXTERN spinlock_t uidsidlock;
1467 GLOBAL_EXTERN spinlock_t gidsidlock;
1468 #endif /* CONFIG_CIFS_ACL */
1470 void cifs_oplock_break(struct work_struct *work);
1472 extern const struct slow_work_ops cifs_oplock_break_ops;
1473 extern struct workqueue_struct *cifsiod_wq;
1475 extern mempool_t *cifs_mid_poolp;
1477 /* Operations for different SMB versions */
1478 #define SMB1_VERSION_STRING "1.0"
1479 extern struct smb_version_operations smb1_operations;
1480 extern struct smb_version_values smb1_values;
1481 #define SMB21_VERSION_STRING "2.1"
1482 extern struct smb_version_operations smb21_operations;
1483 extern struct smb_version_values smb21_values;
1484 #endif /* _CIFS_GLOB_H */