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/workqueue.h>
26 #include "cifs_fs_sb.h"
28 #include <crypto/internal/hash.h>
29 #include <linux/scatterlist.h>
32 * The sizes of various internal tables and strings
34 #define MAX_UID_INFO 16
35 #define MAX_SES_INFO 2
36 #define MAX_TCON_INFO 4
38 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
39 #define MAX_SERVER_SIZE 15
40 #define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */
41 #define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
42 termination then *2 for unicode versions */
43 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
45 #define CIFS_MIN_RCV_POOL 4
48 * default attribute cache timeout (jiffies)
50 #define CIFS_DEF_ACTIMEO (1 * HZ)
53 * max attribute cache timeout (jiffies) - 2^30
55 #define CIFS_MAX_ACTIMEO (1 << 30)
58 * MAX_REQ is the maximum number of requests that WE will send
59 * on one socket concurrently. It also matches the most common
60 * value of max multiplex returned by servers. We may
61 * eventually want to use the negotiated value (in case
62 * future servers can handle more) when we are more confident that
63 * we will not have problems oveloading the socket with pending
66 #define CIFS_MAX_REQ 50
68 #define RFC1001_NAME_LEN 15
69 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
71 /* currently length of NIP6_FMT */
72 #define SERVER_NAME_LENGTH 40
73 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
75 /* used to define string lengths for reversing unicode strings */
77 /* (max path length + 1 for null) * 2 for unicode */
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 */
99 LANMAN = 0, /* Legacy LANMAN auth */
100 NTLM, /* Legacy NTLM012 auth with NTLM hash */
101 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
102 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
103 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
104 Kerberos, /* Kerberos via SPNEGO */
110 /* Netbios frames protocol not supported at this time */
118 /* crypto security descriptor definition */
120 struct shash_desc shash;
124 /* crypto hashing related structure/fields, not specific to a sec mech */
125 struct cifs_secmech {
126 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
127 struct crypto_shash *md5; /* md5 hash function */
128 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
129 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
132 /* per smb session structure/fields */
133 struct ntlmssp_auth {
134 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
135 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
136 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
137 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
145 struct cifs_sid osid;
146 struct cifs_sid gsid;
147 struct cifs_ntace *ntaces;
148 struct cifs_ace *aces;
152 *****************************************************************
153 * Except the CIFS PDUs themselves all the
154 * globally interesting structs should go here
155 *****************************************************************
158 struct TCP_Server_Info {
159 struct list_head tcp_ses_list;
160 struct list_head smb_ses_list;
161 int srv_count; /* reference counter */
162 /* 15 character server name + 0x20 16th byte indicating type = srv */
163 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
164 char *hostname; /* hostname portion of UNC string */
165 struct socket *ssocket;
166 struct sockaddr_storage dstaddr;
167 struct sockaddr_storage srcaddr; /* locally bind to this IP */
168 wait_queue_head_t response_q;
169 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
170 struct list_head pending_mid_q;
171 void *Server_NlsInfo; /* BB - placeholder for future NLS info */
172 unsigned short server_codepage; /* codepage for the server */
173 enum protocolEnum protocolType;
176 bool svlocal:1; /* local server or remote */
177 bool noblocksnd; /* use blocking sendmsg */
178 bool noautotune; /* do not autotune send buf sizes */
180 atomic_t inFlight; /* number of requests on the wire to server */
181 #ifdef CONFIG_CIFS_STATS2
182 atomic_t inSend; /* requests trying to send */
183 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
185 enum statusEnum tcpStatus; /* what we think the status is */
186 struct mutex srv_mutex;
187 struct task_struct *tsk;
188 char server_GUID[16];
190 enum securityEnum secType;
191 unsigned int maxReq; /* Clients should submit no more */
192 /* than maxReq distinct unanswered SMBs to the server when using */
193 /* multiplexed reads or writes */
194 unsigned int maxBuf; /* maxBuf specifies the maximum */
195 /* message size the server can send or receive for non-raw SMBs */
196 unsigned int max_rw; /* maxRw specifies the maximum */
197 /* message size the server can send or receive for */
198 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
199 unsigned int max_vcs; /* maximum number of smb sessions, at least
200 those that can be specified uniquely with
202 char sessid[4]; /* unique token id for this session */
203 /* (returned on Negotiate */
204 int capabilities; /* allow selective disabling of caps by smb sess */
205 int timeAdj; /* Adjust for difference in server time zone in sec */
206 __u16 CurrentMid; /* multiplex id - rotating counter */
207 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
208 /* 16th byte of RFC1001 workstation name is always null */
209 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
210 __u32 sequence_number; /* for signing, protected by srv_mutex */
211 struct session_key session_key;
212 unsigned long lstrp; /* when we got last response from this server */
213 u16 dialect; /* dialect index that server chose */
214 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
215 /* extended security flavors that server supports */
216 bool sec_kerberos; /* supports plain Kerberos */
217 bool sec_mskerberos; /* supports legacy MS Kerberos */
218 bool sec_kerberosu2u; /* supports U2U Kerberos */
219 bool sec_ntlmssp; /* supports NTLMSSP */
220 bool session_estab; /* mark when very first sess is established */
221 struct delayed_work echo; /* echo ping workqueue job */
222 #ifdef CONFIG_CIFS_FSCACHE
223 struct fscache_cookie *fscache; /* client index cache cookie */
228 * Session structure. One of these for each uid session with a particular host
231 struct list_head smb_ses_list;
232 struct list_head tcon_list;
233 struct mutex session_mutex;
234 struct TCP_Server_Info *server; /* pointer to server info */
235 int ses_count; /* reference counter */
236 enum statusEnum status;
237 unsigned overrideSecFlg; /* if non-zero override global sec flags */
238 __u16 ipc_tid; /* special tid for connection to IPC share */
241 char *serverOS; /* name of operating system underlying server */
242 char *serverNOS; /* name of network operating system of server */
243 char *serverDomain; /* security realm of server */
244 int Suid; /* remote smb uid */
245 uid_t linux_uid; /* overriding owner of files on the mount */
246 uid_t cred_uid; /* owner of credentials */
248 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
249 TCP names - will ipv6 and sctp addresses fit? */
250 char userName[MAX_USERNAME_SIZE + 1];
253 struct session_key auth_key;
254 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
255 bool need_reconnect:1; /* connection reset, uid now invalid */
257 /* no more than one of the following three session flags may be set */
258 #define CIFS_SES_NT4 1
259 #define CIFS_SES_OS2 2
260 #define CIFS_SES_W9X 4
261 /* following flag is set for old servers such as OS2 (and Win95?)
262 which do not negotiate NTLM or POSIX dialects, but instead
263 negotiate one of the older LANMAN dialects */
264 #define CIFS_SES_LANMAN 8
266 * there is one of these for each connection to a resource on a particular
269 struct cifsTconInfo {
270 struct list_head tcon_list;
272 struct list_head openFileList;
273 struct cifsSesInfo *ses; /* pointer to session associated with */
274 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
275 char *nativeFileSystem;
276 char *password; /* for share-level security */
277 __u16 tid; /* The 2 byte tree id */
278 __u16 Flags; /* optional support bits */
279 enum statusEnum tidStatus;
280 #ifdef CONFIG_CIFS_STATS
281 atomic_t num_smbs_sent;
284 atomic_t num_flushes;
285 atomic_t num_oplock_brks;
288 atomic_t num_deletes;
290 atomic_t num_posixopens;
291 atomic_t num_posixmkdirs;
293 atomic_t num_renames;
294 atomic_t num_t2renames;
298 atomic_t num_hardlinks;
299 atomic_t num_symlinks;
301 atomic_t num_acl_get;
302 atomic_t num_acl_set;
303 #ifdef CONFIG_CIFS_STATS2
304 unsigned long long time_writes;
305 unsigned long long time_reads;
306 unsigned long long time_opens;
307 unsigned long long time_deletes;
308 unsigned long long time_closes;
309 unsigned long long time_mkdirs;
310 unsigned long long time_rmdirs;
311 unsigned long long time_renames;
312 unsigned long long time_t2renames;
313 unsigned long long time_ffirst;
314 unsigned long long time_fnext;
315 unsigned long long time_fclose;
316 #endif /* CONFIG_CIFS_STATS2 */
319 spinlock_t stat_lock;
320 #endif /* CONFIG_CIFS_STATS */
321 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
322 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
323 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
324 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
327 bool seal:1; /* transport encryption for this mounted share */
328 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
329 for this mount even if server would support */
330 bool local_lease:1; /* check leases (only) on local system not remote */
331 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
332 bool need_reconnect:1; /* connection reset, tid now invalid */
333 #ifdef CONFIG_CIFS_FSCACHE
334 u64 resource_id; /* server resource id */
335 struct fscache_cookie *fscache; /* cookie for share */
337 /* BB add field for back pointer to sb struct(s)? */
341 * This is a refcounted and timestamped container for a tcon pointer. The
342 * container holds a tcon reference. It is considered safe to free one of
343 * these when the tl_count goes to 0. The tl_time is the time of the last
344 * "get" on the container.
347 struct rb_node tl_rbnode;
349 unsigned long tl_flags;
350 #define TCON_LINK_MASTER 0
351 #define TCON_LINK_PENDING 1
352 #define TCON_LINK_IN_TREE 2
353 unsigned long tl_time;
355 struct cifsTconInfo *tl_tcon;
358 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
360 static inline struct cifsTconInfo *
361 tlink_tcon(struct tcon_link *tlink)
363 return tlink->tl_tcon;
366 extern void cifs_put_tlink(struct tcon_link *tlink);
368 static inline struct tcon_link *
369 cifs_get_tlink(struct tcon_link *tlink)
371 if (tlink && !IS_ERR(tlink))
372 atomic_inc(&tlink->tl_count);
376 /* This function is always expected to succeed */
377 extern struct cifsTconInfo *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
380 * This info hangs off the cifsFileInfo structure, pointed to by llist.
381 * This is used to track byte stream locks on the file
383 struct cifsLockInfo {
384 struct list_head llist; /* pointer to next cifsLockInfo */
391 * One of these for each open instance of a file
393 struct cifs_search_info {
394 loff_t index_of_last_entry;
395 __u16 entries_in_buffer;
398 char *ntwrk_buf_start;
399 char *srch_entries_start;
402 unsigned int resume_name_len;
406 bool smallBuf:1; /* so we know which buf_release function to call */
409 struct cifsFileInfo {
410 struct list_head tlist; /* pointer to next fid owned by tcon */
411 struct list_head flist; /* next fid (file instance) for this inode */
412 unsigned int uid; /* allows finding which FileInfo structure */
413 __u32 pid; /* process id who opened file */
414 __u16 netfid; /* file id from remote */
415 /* BB add lock scope info here if needed */ ;
416 /* lock scope id (0 if none) */
417 struct dentry *dentry;
418 unsigned int f_flags;
419 struct tcon_link *tlink;
420 struct mutex lock_mutex;
421 struct list_head llist; /* list of byte range locks we have. */
422 bool invalidHandle:1; /* file closed via session abend */
423 bool oplock_break_cancelled:1;
424 int count; /* refcount protected by cifs_file_list_lock */
425 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
426 struct cifs_search_info srch_inf;
427 struct work_struct oplock_break; /* work for oplock breaks */
431 * Take a reference on the file private data. Must be called with
432 * cifs_file_list_lock held.
434 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
439 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
442 * One of these for each file inode
445 struct cifsInodeInfo {
446 struct list_head lockList;
447 /* BB add in lists for dirty pages i.e. write caching info for oplock */
448 struct list_head openFileList;
449 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
450 unsigned long time; /* jiffies of last update/check of inode */
451 bool clientCanCacheRead:1; /* read oplock */
452 bool clientCanCacheAll:1; /* read and writebehind oplock */
453 bool delete_pending:1; /* DELETE_ON_CLOSE is set */
454 bool invalid_mapping:1; /* pagecache is invalid */
455 u64 server_eof; /* current file size on server */
456 u64 uniqueid; /* server inode number */
457 u64 createtime; /* creation time on server */
458 #ifdef CONFIG_CIFS_FSCACHE
459 struct fscache_cookie *fscache;
461 struct inode vfs_inode;
464 static inline struct cifsInodeInfo *
465 CIFS_I(struct inode *inode)
467 return container_of(inode, struct cifsInodeInfo, vfs_inode);
470 static inline struct cifs_sb_info *
471 CIFS_SB(struct super_block *sb)
473 return sb->s_fs_info;
476 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
478 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
484 #ifdef CONFIG_CIFS_STATS
485 #define cifs_stats_inc atomic_inc
487 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
491 spin_lock(&tcon->stat_lock);
492 tcon->bytes_written += bytes;
493 spin_unlock(&tcon->stat_lock);
497 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
500 spin_lock(&tcon->stat_lock);
501 tcon->bytes_read += bytes;
502 spin_unlock(&tcon->stat_lock);
506 #define cifs_stats_inc(field) do {} while (0)
507 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
508 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
515 * This is the prototype for the mid callback function. When creating one,
516 * take special care to avoid deadlocks. Things to bear in mind:
518 * - it will be called by cifsd
519 * - the GlobalMid_Lock will be held
520 * - the mid will be removed from the pending_mid_q list
522 typedef void (mid_callback_t)(struct mid_q_entry *mid);
524 /* one of these for every pending CIFS request to the server */
526 struct list_head qhead; /* mids waiting on reply from this server */
527 __u16 mid; /* multiplex id */
528 __u16 pid; /* process id */
529 __u32 sequence_number; /* for CIFS signing */
530 unsigned long when_alloc; /* when mid was created */
531 #ifdef CONFIG_CIFS_STATS2
532 unsigned long when_sent; /* time when smb send finished */
533 unsigned long when_received; /* when demux complete (taken off wire) */
535 mid_callback_t *callback; /* call completion callback */
536 void *callback_data; /* general purpose pointer for callback */
537 struct smb_hdr *resp_buf; /* response buffer */
538 int midState; /* wish this were enum but can not pass to wait_event */
539 __u8 command; /* smb command code */
540 bool largeBuf:1; /* if valid response, is pointer to large buf */
541 bool multiRsp:1; /* multiple trans2 responses for one request */
542 bool multiEnd:1; /* both received */
545 struct oplock_q_entry {
546 struct list_head qhead;
547 struct inode *pinode;
548 struct cifsTconInfo *tcon;
552 /* for pending dnotify requests */
553 struct dir_notify_req {
554 struct list_head lhead;
561 __u32 filter; /* CompletionFilter (for multishot) */
566 struct dfs_info3_param {
567 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
576 * common struct for holding inode info when searching for or updating an
577 * inode with new info
580 #define CIFS_FATTR_DFS_REFERRAL 0x1
581 #define CIFS_FATTR_DELETE_PENDING 0x2
582 #define CIFS_FATTR_NEED_REVAL 0x4
583 #define CIFS_FATTR_INO_COLLISION 0x8
596 unsigned int cf_nlink;
597 unsigned int cf_dtype;
598 struct timespec cf_atime;
599 struct timespec cf_mtime;
600 struct timespec cf_ctime;
603 static inline void free_dfs_info_param(struct dfs_info3_param *param)
606 kfree(param->path_name);
607 kfree(param->node_name);
612 static inline void free_dfs_info_array(struct dfs_info3_param *param,
616 if ((number_of_items == 0) || (param == NULL))
618 for (i = 0; i < number_of_items; i++) {
619 kfree(param[i].path_name);
620 kfree(param[i].node_name);
626 #define MID_REQUEST_ALLOCATED 1
627 #define MID_REQUEST_SUBMITTED 2
628 #define MID_RESPONSE_RECEIVED 4
629 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
630 #define MID_NO_RESP_NEEDED 0x10
632 /* Types of response buffer returned from SendReceive2 */
633 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
634 #define CIFS_SMALL_BUFFER 1
635 #define CIFS_LARGE_BUFFER 2
636 #define CIFS_IOVEC 4 /* array of response buffers */
638 /* Type of Request to SendReceive2 */
639 #define CIFS_BLOCKING_OP 1 /* operation can block */
640 #define CIFS_ASYNC_OP 2 /* do not wait for response */
641 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
642 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
643 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
644 #define CIFS_NO_RESP 0x040 /* no response buffer required */
646 /* Security Flags: indicate type of session setup needed */
647 #define CIFSSEC_MAY_SIGN 0x00001
648 #define CIFSSEC_MAY_NTLM 0x00002
649 #define CIFSSEC_MAY_NTLMV2 0x00004
650 #define CIFSSEC_MAY_KRB5 0x00008
651 #ifdef CONFIG_CIFS_WEAK_PW_HASH
652 #define CIFSSEC_MAY_LANMAN 0x00010
653 #define CIFSSEC_MAY_PLNTXT 0x00020
655 #define CIFSSEC_MAY_LANMAN 0
656 #define CIFSSEC_MAY_PLNTXT 0
657 #endif /* weak passwords */
658 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
659 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
661 #define CIFSSEC_MUST_SIGN 0x01001
662 /* note that only one of the following can be set so the
663 result of setting MUST flags more than once will be to
664 require use of the stronger protocol */
665 #define CIFSSEC_MUST_NTLM 0x02002
666 #define CIFSSEC_MUST_NTLMV2 0x04004
667 #define CIFSSEC_MUST_KRB5 0x08008
668 #ifdef CONFIG_CIFS_WEAK_PW_HASH
669 #define CIFSSEC_MUST_LANMAN 0x10010
670 #define CIFSSEC_MUST_PLNTXT 0x20020
671 #ifdef CONFIG_CIFS_UPCALL
672 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
674 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
676 #else /* do not allow weak pw hash */
677 #ifdef CONFIG_CIFS_UPCALL
678 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
680 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
682 #endif /* WEAK_PW_HASH */
683 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
684 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
686 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
687 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
688 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
690 *****************************************************************
691 * All constants go here
692 *****************************************************************
695 #define UID_HASH (16)
698 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
699 * following to be declared.
702 /****************************************************************************
703 * Locking notes. All updates to global variables and lists should be
704 * protected by spinlocks or semaphores.
708 * GlobalMid_Lock protects:
709 * list operations on pending_mid_q and oplockQ
710 * updates to XID counters, multiplex id and SMB sequence numbers
711 * cifs_file_list_lock protects:
712 * list operations on tcp and SMB session lists and tCon lists
713 * f_owner.lock protects certain per file struct operations
714 * mapping->page_lock protects certain per page operations
718 * sesSem operations on smb session
719 * tconSem operations on tree connection
720 * fh_sem file handle reconnection operations
722 ****************************************************************************/
724 #ifdef DECLARE_GLOBALS_HERE
725 #define GLOBAL_EXTERN
727 #define GLOBAL_EXTERN extern
731 * the list of TCP_Server_Info structures, ie each of the sockets
732 * connecting our client to a distinct server (ip address), is
733 * chained together by cifs_tcp_ses_list. The list of all our SMB
734 * sessions (and from that the tree connections) can be found
735 * by iterating over cifs_tcp_ses_list
737 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
740 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
741 * tcp session, and the list of tcon's per smb session. It also protects
742 * the reference counters for the server, smb session, and tcon. Finally,
743 * changes to the tcon->tidStatus should be done while holding this lock.
745 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
748 * This lock protects the cifs_file->llist and cifs_file->flist
749 * list operations, and updates to some flags (cifs_file->invalidHandle)
750 * It will be moved to either use the tcon->stat_lock or equivalent later.
751 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
752 * the cifs_tcp_ses_lock must be grabbed first and released last.
754 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
756 /* Outstanding dir notify requests */
757 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
758 /* DirNotify response queue */
759 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
762 * Global transaction id (XID) information
764 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
765 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
766 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
767 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
768 /* on midQ entries */
770 * Global counters, updated atomically
772 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
773 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
774 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
775 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
776 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
778 /* Various Debug counters */
779 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
780 #ifdef CONFIG_CIFS_STATS2
781 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
782 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
784 GLOBAL_EXTERN atomic_t smBufAllocCount;
785 GLOBAL_EXTERN atomic_t midCount;
788 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
789 to be established on existing mount if we
790 have the uid/password or Kerberos credential
791 or equivalent for current user */
792 GLOBAL_EXTERN unsigned int oplockEnabled;
793 GLOBAL_EXTERN unsigned int experimEnabled;
794 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
795 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
796 with more secure ntlmssp2 challenge/resp */
797 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
798 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
799 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
800 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
801 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
802 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
804 /* reconnect after this many failed echo attempts */
805 GLOBAL_EXTERN unsigned short echo_retries;
807 void cifs_oplock_break(struct work_struct *work);
808 void cifs_oplock_break_get(struct cifsFileInfo *cfile);
809 void cifs_oplock_break_put(struct cifsFileInfo *cfile);
811 extern const struct slow_work_ops cifs_oplock_break_ops;
813 #endif /* _CIFS_GLOB_H */