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"
29 * The sizes of various internal tables and strings
31 #define MAX_UID_INFO 16
32 #define MAX_SES_INFO 2
33 #define MAX_TCON_INFO 4
35 #define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
36 #define MAX_SERVER_SIZE 15
37 #define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */
38 #define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
39 termination then *2 for unicode versions */
40 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
42 #define CIFS_MIN_RCV_POOL 4
45 * MAX_REQ is the maximum number of requests that WE will send
46 * on one socket concurrently. It also matches the most common
47 * value of max multiplex returned by servers. We may
48 * eventually want to use the negotiated value (in case
49 * future servers can handle more) when we are more confident that
50 * we will not have problems oveloading the socket with pending
53 #define CIFS_MAX_REQ 50
55 #define RFC1001_NAME_LEN 15
56 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
58 /* currently length of NIP6_FMT */
59 #define SERVER_NAME_LENGTH 40
60 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
62 /* used to define string lengths for reversing unicode strings */
64 /* (max path length + 1 for null) * 2 for unicode */
69 #ifndef XATTR_DOS_ATTRIB
70 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
74 * CIFS vfs client Status information (based on what we know.)
77 /* associated with each tcp and smb session */
86 LANMAN = 0, /* Legacy LANMAN auth */
87 NTLM, /* Legacy NTLM012 auth with NTLM hash */
88 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
89 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
90 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
91 Kerberos, /* Kerberos via SPNEGO */
97 /* Netbios frames protocol not supported at this time */
103 char ntlm[CIFS_SESS_KEY_SIZE + 16];
104 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
107 struct ntlmv2_resp resp;
117 struct cifs_sid osid;
118 struct cifs_sid gsid;
119 struct cifs_ntace *ntaces;
120 struct cifs_ace *aces;
124 *****************************************************************
125 * Except the CIFS PDUs themselves all the
126 * globally interesting structs should go here
127 *****************************************************************
130 struct TCP_Server_Info {
131 struct list_head tcp_ses_list;
132 struct list_head smb_ses_list;
133 int srv_count; /* reference counter */
134 /* 15 character server name + 0x20 16th byte indicating type = srv */
135 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
136 char *hostname; /* hostname portion of UNC string */
137 struct socket *ssocket;
139 struct sockaddr_in sockAddr;
140 struct sockaddr_in6 sockAddr6;
142 struct sockaddr_storage srcaddr; /* locally bind to this IP */
143 wait_queue_head_t response_q;
144 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
145 struct list_head pending_mid_q;
146 void *Server_NlsInfo; /* BB - placeholder for future NLS info */
147 unsigned short server_codepage; /* codepage for the server */
148 enum protocolEnum protocolType;
151 bool svlocal:1; /* local server or remote */
152 bool noblocksnd; /* use blocking sendmsg */
153 bool noautotune; /* do not autotune send buf sizes */
155 atomic_t inFlight; /* number of requests on the wire to server */
156 #ifdef CONFIG_CIFS_STATS2
157 atomic_t inSend; /* requests trying to send */
158 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
160 enum statusEnum tcpStatus; /* what we think the status is */
161 struct mutex srv_mutex;
162 struct task_struct *tsk;
163 char server_GUID[16];
165 enum securityEnum secType;
166 unsigned int maxReq; /* Clients should submit no more */
167 /* than maxReq distinct unanswered SMBs to the server when using */
168 /* multiplexed reads or writes */
169 unsigned int maxBuf; /* maxBuf specifies the maximum */
170 /* message size the server can send or receive for non-raw SMBs */
171 unsigned int max_rw; /* maxRw specifies the maximum */
172 /* message size the server can send or receive for */
173 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
174 unsigned int max_vcs; /* maximum number of smb sessions, at least
175 those that can be specified uniquely with
177 char sessid[4]; /* unique token id for this session */
178 /* (returned on Negotiate */
179 int capabilities; /* allow selective disabling of caps by smb sess */
180 int timeAdj; /* Adjust for difference in server time zone in sec */
181 __u16 CurrentMid; /* multiplex id - rotating counter */
182 /* 16th byte of RFC1001 workstation name is always null */
183 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
184 __u32 sequence_number; /* needed for CIFS PDU signature */
185 struct session_key session_key;
186 unsigned long lstrp; /* when we got last response from this server */
187 u16 dialect; /* dialect index that server chose */
188 /* extended security flavors that server supports */
189 bool sec_kerberos; /* supports plain Kerberos */
190 bool sec_mskerberos; /* supports legacy MS Kerberos */
191 bool sec_kerberosu2u; /* supports U2U Kerberos */
192 bool sec_ntlmssp; /* supports NTLMSSP */
193 bool session_estab; /* mark when very first sess is established */
194 #ifdef CONFIG_CIFS_FSCACHE
195 struct fscache_cookie *fscache; /* client index cache cookie */
200 * Session structure. One of these for each uid session with a particular host
203 struct list_head smb_ses_list;
204 struct list_head tcon_list;
205 struct mutex session_mutex;
206 struct TCP_Server_Info *server; /* pointer to server info */
207 int ses_count; /* reference counter */
208 enum statusEnum status;
209 unsigned overrideSecFlg; /* if non-zero override global sec flags */
210 __u16 ipc_tid; /* special tid for connection to IPC share */
213 char *serverOS; /* name of operating system underlying server */
214 char *serverNOS; /* name of network operating system of server */
215 char *serverDomain; /* security realm of server */
216 int Suid; /* remote smb uid */
217 uid_t linux_uid; /* overriding owner of files on the mount */
218 uid_t cred_uid; /* owner of credentials */
220 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
221 TCP names - will ipv6 and sctp addresses fit? */
222 char userName[MAX_USERNAME_SIZE + 1];
225 char cryptKey[CIFS_CRYPTO_KEY_SIZE];
226 struct session_key auth_key;
227 char ntlmv2_hash[16];
228 unsigned int tilen; /* length of the target info blob */
229 unsigned char *tiblob; /* target info blob in challenge response */
230 bool need_reconnect:1; /* connection reset, uid now invalid */
232 /* no more than one of the following three session flags may be set */
233 #define CIFS_SES_NT4 1
234 #define CIFS_SES_OS2 2
235 #define CIFS_SES_W9X 4
236 /* following flag is set for old servers such as OS2 (and Win95?)
237 which do not negotiate NTLM or POSIX dialects, but instead
238 negotiate one of the older LANMAN dialects */
239 #define CIFS_SES_LANMAN 8
241 * there is one of these for each connection to a resource on a particular
244 struct cifsTconInfo {
245 struct list_head tcon_list;
247 struct list_head openFileList;
248 struct cifsSesInfo *ses; /* pointer to session associated with */
249 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
250 char *nativeFileSystem;
251 char *password; /* for share-level security */
252 __u16 tid; /* The 2 byte tree id */
253 __u16 Flags; /* optional support bits */
254 enum statusEnum tidStatus;
255 #ifdef CONFIG_CIFS_STATS
256 atomic_t num_smbs_sent;
259 atomic_t num_flushes;
260 atomic_t num_oplock_brks;
263 atomic_t num_deletes;
265 atomic_t num_posixopens;
266 atomic_t num_posixmkdirs;
268 atomic_t num_renames;
269 atomic_t num_t2renames;
273 atomic_t num_hardlinks;
274 atomic_t num_symlinks;
276 atomic_t num_acl_get;
277 atomic_t num_acl_set;
278 #ifdef CONFIG_CIFS_STATS2
279 unsigned long long time_writes;
280 unsigned long long time_reads;
281 unsigned long long time_opens;
282 unsigned long long time_deletes;
283 unsigned long long time_closes;
284 unsigned long long time_mkdirs;
285 unsigned long long time_rmdirs;
286 unsigned long long time_renames;
287 unsigned long long time_t2renames;
288 unsigned long long time_ffirst;
289 unsigned long long time_fnext;
290 unsigned long long time_fclose;
291 #endif /* CONFIG_CIFS_STATS2 */
294 spinlock_t stat_lock;
295 #endif /* CONFIG_CIFS_STATS */
296 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
297 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
298 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
299 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
302 bool seal:1; /* transport encryption for this mounted share */
303 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
304 for this mount even if server would support */
305 bool local_lease:1; /* check leases (only) on local system not remote */
306 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
307 bool need_reconnect:1; /* connection reset, tid now invalid */
308 #ifdef CONFIG_CIFS_FSCACHE
309 u64 resource_id; /* server resource id */
310 struct fscache_cookie *fscache; /* cookie for share */
312 /* BB add field for back pointer to sb struct(s)? */
316 * This is a refcounted and timestamped container for a tcon pointer. The
317 * container holds a tcon reference. It is considered safe to free one of
318 * these when the tl_count goes to 0. The tl_time is the time of the last
319 * "get" on the container.
322 unsigned long tl_index;
323 unsigned long tl_flags;
324 #define TCON_LINK_MASTER 0
325 #define TCON_LINK_PENDING 1
326 #define TCON_LINK_IN_TREE 2
327 unsigned long tl_time;
329 struct cifsTconInfo *tl_tcon;
332 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
334 static inline struct cifsTconInfo *
335 tlink_tcon(struct tcon_link *tlink)
337 return tlink->tl_tcon;
340 extern void cifs_put_tlink(struct tcon_link *tlink);
342 static inline struct tcon_link *
343 cifs_get_tlink(struct tcon_link *tlink)
345 if (tlink && !IS_ERR(tlink))
346 atomic_inc(&tlink->tl_count);
350 /* This function is always expected to succeed */
351 extern struct cifsTconInfo *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
354 * This info hangs off the cifsFileInfo structure, pointed to by llist.
355 * This is used to track byte stream locks on the file
357 struct cifsLockInfo {
358 struct list_head llist; /* pointer to next cifsLockInfo */
365 * One of these for each open instance of a file
367 struct cifs_search_info {
368 loff_t index_of_last_entry;
369 __u16 entries_in_buffer;
372 char *ntwrk_buf_start;
373 char *srch_entries_start;
376 unsigned int resume_name_len;
380 bool smallBuf:1; /* so we know which buf_release function to call */
383 struct cifsFileInfo {
384 struct list_head tlist; /* pointer to next fid owned by tcon */
385 struct list_head flist; /* next fid (file instance) for this inode */
386 unsigned int uid; /* allows finding which FileInfo structure */
387 __u32 pid; /* process id who opened file */
388 __u16 netfid; /* file id from remote */
389 /* BB add lock scope info here if needed */ ;
390 /* lock scope id (0 if none) */
391 struct dentry *dentry;
392 unsigned int f_flags;
393 struct tcon_link *tlink;
394 struct mutex lock_mutex;
395 struct list_head llist; /* list of byte range locks we have. */
396 bool invalidHandle:1; /* file closed via session abend */
397 bool oplock_break_cancelled:1;
398 int count; /* refcount protected by cifs_file_list_lock */
399 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
400 struct cifs_search_info srch_inf;
401 struct work_struct oplock_break; /* work for oplock breaks */
405 * Take a reference on the file private data. Must be called with
406 * cifs_file_list_lock held.
408 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
413 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
416 * One of these for each file inode
419 struct cifsInodeInfo {
420 struct list_head lockList;
421 /* BB add in lists for dirty pages i.e. write caching info for oplock */
422 struct list_head openFileList;
423 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
424 unsigned long time; /* jiffies of last update/check of inode */
425 bool clientCanCacheRead:1; /* read oplock */
426 bool clientCanCacheAll:1; /* read and writebehind oplock */
427 bool delete_pending:1; /* DELETE_ON_CLOSE is set */
428 bool invalid_mapping:1; /* pagecache is invalid */
429 u64 server_eof; /* current file size on server */
430 u64 uniqueid; /* server inode number */
431 #ifdef CONFIG_CIFS_FSCACHE
432 struct fscache_cookie *fscache;
434 struct inode vfs_inode;
437 static inline struct cifsInodeInfo *
438 CIFS_I(struct inode *inode)
440 return container_of(inode, struct cifsInodeInfo, vfs_inode);
443 static inline struct cifs_sb_info *
444 CIFS_SB(struct super_block *sb)
446 return sb->s_fs_info;
449 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
451 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
457 #ifdef CONFIG_CIFS_STATS
458 #define cifs_stats_inc atomic_inc
460 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
464 spin_lock(&tcon->stat_lock);
465 tcon->bytes_written += bytes;
466 spin_unlock(&tcon->stat_lock);
470 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
473 spin_lock(&tcon->stat_lock);
474 tcon->bytes_read += bytes;
475 spin_unlock(&tcon->stat_lock);
479 #define cifs_stats_inc(field) do {} while (0)
480 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
481 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
485 /* one of these for every pending CIFS request to the server */
487 struct list_head qhead; /* mids waiting on reply from this server */
488 __u16 mid; /* multiplex id */
489 __u16 pid; /* process id */
490 __u32 sequence_number; /* for CIFS signing */
491 unsigned long when_alloc; /* when mid was created */
492 #ifdef CONFIG_CIFS_STATS2
493 unsigned long when_sent; /* time when smb send finished */
494 unsigned long when_received; /* when demux complete (taken off wire) */
496 struct task_struct *tsk; /* task waiting for response */
497 struct smb_hdr *resp_buf; /* response buffer */
498 int midState; /* wish this were enum but can not pass to wait_event */
499 __u8 command; /* smb command code */
500 bool largeBuf:1; /* if valid response, is pointer to large buf */
501 bool multiRsp:1; /* multiple trans2 responses for one request */
502 bool multiEnd:1; /* both received */
505 struct oplock_q_entry {
506 struct list_head qhead;
507 struct inode *pinode;
508 struct cifsTconInfo *tcon;
512 /* for pending dnotify requests */
513 struct dir_notify_req {
514 struct list_head lhead;
521 __u32 filter; /* CompletionFilter (for multishot) */
526 struct dfs_info3_param {
527 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
536 * common struct for holding inode info when searching for or updating an
537 * inode with new info
540 #define CIFS_FATTR_DFS_REFERRAL 0x1
541 #define CIFS_FATTR_DELETE_PENDING 0x2
542 #define CIFS_FATTR_NEED_REVAL 0x4
543 #define CIFS_FATTR_INO_COLLISION 0x8
555 unsigned int cf_nlink;
556 unsigned int cf_dtype;
557 struct timespec cf_atime;
558 struct timespec cf_mtime;
559 struct timespec cf_ctime;
562 static inline void free_dfs_info_param(struct dfs_info3_param *param)
565 kfree(param->path_name);
566 kfree(param->node_name);
571 static inline void free_dfs_info_array(struct dfs_info3_param *param,
575 if ((number_of_items == 0) || (param == NULL))
577 for (i = 0; i < number_of_items; i++) {
578 kfree(param[i].path_name);
579 kfree(param[i].node_name);
585 #define MID_REQUEST_ALLOCATED 1
586 #define MID_REQUEST_SUBMITTED 2
587 #define MID_RESPONSE_RECEIVED 4
588 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
589 #define MID_NO_RESP_NEEDED 0x10
591 /* Types of response buffer returned from SendReceive2 */
592 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
593 #define CIFS_SMALL_BUFFER 1
594 #define CIFS_LARGE_BUFFER 2
595 #define CIFS_IOVEC 4 /* array of response buffers */
597 /* Type of Request to SendReceive2 */
598 #define CIFS_STD_OP 0 /* normal request timeout */
599 #define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
600 #define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
601 #define CIFS_BLOCKING_OP 4 /* operation can block */
602 #define CIFS_ASYNC_OP 8 /* do not wait for response */
603 #define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
604 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
605 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
606 #define CIFS_NO_RESP 0x040 /* no response buffer required */
608 /* Security Flags: indicate type of session setup needed */
609 #define CIFSSEC_MAY_SIGN 0x00001
610 #define CIFSSEC_MAY_NTLM 0x00002
611 #define CIFSSEC_MAY_NTLMV2 0x00004
612 #define CIFSSEC_MAY_KRB5 0x00008
613 #ifdef CONFIG_CIFS_WEAK_PW_HASH
614 #define CIFSSEC_MAY_LANMAN 0x00010
615 #define CIFSSEC_MAY_PLNTXT 0x00020
617 #define CIFSSEC_MAY_LANMAN 0
618 #define CIFSSEC_MAY_PLNTXT 0
619 #endif /* weak passwords */
620 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
621 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
623 #define CIFSSEC_MUST_SIGN 0x01001
624 /* note that only one of the following can be set so the
625 result of setting MUST flags more than once will be to
626 require use of the stronger protocol */
627 #define CIFSSEC_MUST_NTLM 0x02002
628 #define CIFSSEC_MUST_NTLMV2 0x04004
629 #define CIFSSEC_MUST_KRB5 0x08008
630 #ifdef CONFIG_CIFS_WEAK_PW_HASH
631 #define CIFSSEC_MUST_LANMAN 0x10010
632 #define CIFSSEC_MUST_PLNTXT 0x20020
633 #ifdef CONFIG_CIFS_UPCALL
634 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
636 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
638 #else /* do not allow weak pw hash */
639 #ifdef CONFIG_CIFS_UPCALL
640 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
642 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
644 #endif /* WEAK_PW_HASH */
645 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
646 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
648 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
649 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
650 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
652 *****************************************************************
653 * All constants go here
654 *****************************************************************
657 #define UID_HASH (16)
660 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
661 * following to be declared.
664 /****************************************************************************
665 * Locking notes. All updates to global variables and lists should be
666 * protected by spinlocks or semaphores.
670 * GlobalMid_Lock protects:
671 * list operations on pending_mid_q and oplockQ
672 * updates to XID counters, multiplex id and SMB sequence numbers
673 * GlobalSMBSesLock protects:
674 * list operations on tcp and SMB session lists and tCon lists
675 * f_owner.lock protects certain per file struct operations
676 * mapping->page_lock protects certain per page operations
680 * sesSem operations on smb session
681 * tconSem operations on tree connection
682 * fh_sem file handle reconnection operations
684 ****************************************************************************/
686 #ifdef DECLARE_GLOBALS_HERE
687 #define GLOBAL_EXTERN
689 #define GLOBAL_EXTERN extern
693 * the list of TCP_Server_Info structures, ie each of the sockets
694 * connecting our client to a distinct server (ip address), is
695 * chained together by cifs_tcp_ses_list. The list of all our SMB
696 * sessions (and from that the tree connections) can be found
697 * by iterating over cifs_tcp_ses_list
699 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
702 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
703 * tcp session, and the list of tcon's per smb session. It also protects
704 * the reference counters for the server, smb session, and tcon. Finally,
705 * changes to the tcon->tidStatus should be done while holding this lock.
707 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
710 * This lock protects the cifs_file->llist and cifs_file->flist
711 * list operations, and updates to some flags (cifs_file->invalidHandle)
712 * It will be moved to either use the tcon->stat_lock or equivalent later.
713 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
714 * the cifs_tcp_ses_lock must be grabbed first and released last.
716 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
718 /* Outstanding dir notify requests */
719 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
720 /* DirNotify response queue */
721 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
724 * Global transaction id (XID) information
726 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
727 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
728 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
729 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
730 /* on midQ entries */
731 GLOBAL_EXTERN char Local_System_Name[15];
734 * Global counters, updated atomically
736 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
737 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
738 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
739 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
740 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
742 /* Various Debug counters */
743 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
744 #ifdef CONFIG_CIFS_STATS2
745 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
746 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
748 GLOBAL_EXTERN atomic_t smBufAllocCount;
749 GLOBAL_EXTERN atomic_t midCount;
752 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
753 to be established on existing mount if we
754 have the uid/password or Kerberos credential
755 or equivalent for current user */
756 GLOBAL_EXTERN unsigned int oplockEnabled;
757 GLOBAL_EXTERN unsigned int experimEnabled;
758 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
759 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
760 with more secure ntlmssp2 challenge/resp */
761 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
762 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
763 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
764 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
765 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
766 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
768 void cifs_oplock_break(struct work_struct *work);
769 void cifs_oplock_break_get(struct cifsFileInfo *cfile);
770 void cifs_oplock_break_put(struct cifsFileInfo *cfile);
772 extern const struct slow_work_ops cifs_oplock_break_ops;
774 #endif /* _CIFS_GLOB_H */