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 80
41 #define MAX_USERNAME_SIZE 256 /* reasonable maximum for current servers */
42 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
44 #define CIFS_MIN_RCV_POOL 4
47 * default attribute cache timeout (jiffies)
49 #define CIFS_DEF_ACTIMEO (1 * HZ)
52 * max attribute cache timeout (jiffies) - 2^30
54 #define CIFS_MAX_ACTIMEO (1 << 30)
57 * MAX_REQ is the maximum number of requests that WE will send
58 * on one socket concurrently. It also matches the most common
59 * value of max multiplex returned by servers. We may
60 * eventually want to use the negotiated value (in case
61 * future servers can handle more) when we are more confident that
62 * we will not have problems oveloading the socket with pending
65 #define CIFS_MAX_REQ 50
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 */
81 #ifndef XATTR_DOS_ATTRIB
82 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
86 * CIFS vfs client Status information (based on what we know.)
89 /* 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 enum statusEnum tcpStatus; /* what we think the status is */
165 char *hostname; /* hostname portion of UNC string */
166 struct socket *ssocket;
167 struct sockaddr_storage dstaddr;
168 struct sockaddr_storage srcaddr; /* locally bind to this IP */
172 wait_queue_head_t response_q;
173 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
174 struct list_head pending_mid_q;
175 bool noblocksnd; /* use blocking sendmsg */
176 bool noautotune; /* do not autotune send buf sizes */
178 atomic_t inFlight; /* number of requests on the wire to server */
179 struct mutex srv_mutex;
180 struct task_struct *tsk;
181 char server_GUID[16];
183 bool session_estab; /* mark when very first sess is established */
184 u16 dialect; /* dialect index that server chose */
185 enum securityEnum secType;
186 unsigned int maxReq; /* Clients should submit no more */
187 /* than maxReq distinct unanswered SMBs to the server when using */
188 /* multiplexed reads or writes */
189 unsigned int maxBuf; /* maxBuf specifies the maximum */
190 /* message size the server can send or receive for non-raw SMBs */
191 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
192 /* when socket is setup (and during reconnect) before NegProt sent */
193 unsigned int max_rw; /* maxRw specifies the maximum */
194 /* message size the server can send or receive for */
195 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
196 unsigned int max_vcs; /* maximum number of smb sessions, at least
197 those that can be specified uniquely with
199 int capabilities; /* allow selective disabling of caps by smb sess */
200 int timeAdj; /* Adjust for difference in server time zone in sec */
201 __u16 CurrentMid; /* multiplex id - rotating counter */
202 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
203 /* 16th byte of RFC1001 workstation name is always null */
204 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
205 __u32 sequence_number; /* for signing, protected by srv_mutex */
206 struct session_key session_key;
207 unsigned long lstrp; /* when we got last response from this server */
208 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
209 /* extended security flavors that server supports */
210 bool sec_ntlmssp; /* supports NTLMSSP */
211 bool sec_kerberosu2u; /* supports U2U Kerberos */
212 bool sec_kerberos; /* supports plain Kerberos */
213 bool sec_mskerberos; /* supports legacy MS Kerberos */
214 struct delayed_work echo; /* echo ping workqueue job */
215 #ifdef CONFIG_CIFS_FSCACHE
216 struct fscache_cookie *fscache; /* client index cache cookie */
218 #ifdef CONFIG_CIFS_STATS2
219 atomic_t inSend; /* requests trying to send */
220 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
225 * Macros to allow the TCP_Server_Info->net field and related code to drop out
226 * when CONFIG_NET_NS isn't set.
231 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
236 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
243 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
248 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
255 * Session structure. One of these for each uid session with a particular host
258 struct list_head smb_ses_list;
259 struct list_head tcon_list;
260 struct mutex session_mutex;
261 struct TCP_Server_Info *server; /* pointer to server info */
262 int ses_count; /* reference counter */
263 enum statusEnum status;
264 unsigned overrideSecFlg; /* if non-zero override global sec flags */
265 __u16 ipc_tid; /* special tid for connection to IPC share */
268 char *serverOS; /* name of operating system underlying server */
269 char *serverNOS; /* name of network operating system of server */
270 char *serverDomain; /* security realm of server */
271 int Suid; /* remote smb uid */
272 uid_t linux_uid; /* overriding owner of files on the mount */
273 uid_t cred_uid; /* owner of credentials */
275 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
276 TCP names - will ipv6 and sctp addresses fit? */
277 char *user_name; /* must not be null except during init of sess
278 and after mount option parsing we fill it */
281 struct session_key auth_key;
282 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
283 bool need_reconnect:1; /* connection reset, uid now invalid */
285 /* no more than one of the following three session flags may be set */
286 #define CIFS_SES_NT4 1
287 #define CIFS_SES_OS2 2
288 #define CIFS_SES_W9X 4
289 /* following flag is set for old servers such as OS2 (and Win95?)
290 which do not negotiate NTLM or POSIX dialects, but instead
291 negotiate one of the older LANMAN dialects */
292 #define CIFS_SES_LANMAN 8
294 * there is one of these for each connection to a resource on a particular
297 struct cifsTconInfo {
298 struct list_head tcon_list;
300 struct list_head openFileList;
301 struct cifsSesInfo *ses; /* pointer to session associated with */
302 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
303 char *nativeFileSystem;
304 char *password; /* for share-level security */
305 __u16 tid; /* The 2 byte tree id */
306 __u16 Flags; /* optional support bits */
307 enum statusEnum tidStatus;
308 #ifdef CONFIG_CIFS_STATS
309 atomic_t num_smbs_sent;
312 atomic_t num_flushes;
313 atomic_t num_oplock_brks;
316 atomic_t num_deletes;
318 atomic_t num_posixopens;
319 atomic_t num_posixmkdirs;
321 atomic_t num_renames;
322 atomic_t num_t2renames;
326 atomic_t num_hardlinks;
327 atomic_t num_symlinks;
329 atomic_t num_acl_get;
330 atomic_t num_acl_set;
331 #ifdef CONFIG_CIFS_STATS2
332 unsigned long long time_writes;
333 unsigned long long time_reads;
334 unsigned long long time_opens;
335 unsigned long long time_deletes;
336 unsigned long long time_closes;
337 unsigned long long time_mkdirs;
338 unsigned long long time_rmdirs;
339 unsigned long long time_renames;
340 unsigned long long time_t2renames;
341 unsigned long long time_ffirst;
342 unsigned long long time_fnext;
343 unsigned long long time_fclose;
344 #endif /* CONFIG_CIFS_STATS2 */
347 spinlock_t stat_lock;
348 #endif /* CONFIG_CIFS_STATS */
349 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
350 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
351 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
352 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
355 bool seal:1; /* transport encryption for this mounted share */
356 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
357 for this mount even if server would support */
358 bool local_lease:1; /* check leases (only) on local system not remote */
359 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
360 bool need_reconnect:1; /* connection reset, tid now invalid */
361 #ifdef CONFIG_CIFS_FSCACHE
362 u64 resource_id; /* server resource id */
363 struct fscache_cookie *fscache; /* cookie for share */
365 /* BB add field for back pointer to sb struct(s)? */
369 * This is a refcounted and timestamped container for a tcon pointer. The
370 * container holds a tcon reference. It is considered safe to free one of
371 * these when the tl_count goes to 0. The tl_time is the time of the last
372 * "get" on the container.
375 struct rb_node tl_rbnode;
377 unsigned long tl_flags;
378 #define TCON_LINK_MASTER 0
379 #define TCON_LINK_PENDING 1
380 #define TCON_LINK_IN_TREE 2
381 unsigned long tl_time;
383 struct cifsTconInfo *tl_tcon;
386 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
388 static inline struct cifsTconInfo *
389 tlink_tcon(struct tcon_link *tlink)
391 return tlink->tl_tcon;
394 extern void cifs_put_tlink(struct tcon_link *tlink);
396 static inline struct tcon_link *
397 cifs_get_tlink(struct tcon_link *tlink)
399 if (tlink && !IS_ERR(tlink))
400 atomic_inc(&tlink->tl_count);
404 /* This function is always expected to succeed */
405 extern struct cifsTconInfo *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
408 * This info hangs off the cifsFileInfo structure, pointed to by llist.
409 * This is used to track byte stream locks on the file
411 struct cifsLockInfo {
412 struct list_head llist; /* pointer to next cifsLockInfo */
419 * One of these for each open instance of a file
421 struct cifs_search_info {
422 loff_t index_of_last_entry;
423 __u16 entries_in_buffer;
426 char *ntwrk_buf_start;
427 char *srch_entries_start;
430 unsigned int resume_name_len;
434 bool smallBuf:1; /* so we know which buf_release function to call */
437 struct cifsFileInfo {
438 struct list_head tlist; /* pointer to next fid owned by tcon */
439 struct list_head flist; /* next fid (file instance) for this inode */
440 unsigned int uid; /* allows finding which FileInfo structure */
441 __u32 pid; /* process id who opened file */
442 __u16 netfid; /* file id from remote */
443 /* BB add lock scope info here if needed */ ;
444 /* lock scope id (0 if none) */
445 struct dentry *dentry;
446 unsigned int f_flags;
447 struct tcon_link *tlink;
448 struct mutex lock_mutex;
449 struct list_head llist; /* list of byte range locks we have. */
450 bool invalidHandle:1; /* file closed via session abend */
451 bool oplock_break_cancelled:1;
452 int count; /* refcount protected by cifs_file_list_lock */
453 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
454 struct cifs_search_info srch_inf;
455 struct work_struct oplock_break; /* work for oplock breaks */
458 struct cifs_io_parms {
463 struct cifsTconInfo *tcon;
467 * Take a reference on the file private data. Must be called with
468 * cifs_file_list_lock held.
470 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
475 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
478 * One of these for each file inode
481 struct cifsInodeInfo {
482 struct list_head lockList;
483 /* BB add in lists for dirty pages i.e. write caching info for oplock */
484 struct list_head openFileList;
485 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
486 bool clientCanCacheRead; /* read oplock */
487 bool clientCanCacheAll; /* read and writebehind oplock */
488 bool delete_pending; /* DELETE_ON_CLOSE is set */
489 bool invalid_mapping; /* pagecache is invalid */
490 unsigned long time; /* jiffies of last update of inode */
491 u64 server_eof; /* current file size on server */
492 u64 uniqueid; /* server inode number */
493 u64 createtime; /* creation time on server */
494 #ifdef CONFIG_CIFS_FSCACHE
495 struct fscache_cookie *fscache;
497 struct inode vfs_inode;
500 static inline struct cifsInodeInfo *
501 CIFS_I(struct inode *inode)
503 return container_of(inode, struct cifsInodeInfo, vfs_inode);
506 static inline struct cifs_sb_info *
507 CIFS_SB(struct super_block *sb)
509 return sb->s_fs_info;
512 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
514 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
520 #ifdef CONFIG_CIFS_STATS
521 #define cifs_stats_inc atomic_inc
523 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
527 spin_lock(&tcon->stat_lock);
528 tcon->bytes_written += bytes;
529 spin_unlock(&tcon->stat_lock);
533 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
536 spin_lock(&tcon->stat_lock);
537 tcon->bytes_read += bytes;
538 spin_unlock(&tcon->stat_lock);
542 #define cifs_stats_inc(field) do {} while (0)
543 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
544 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
551 * This is the prototype for the mid callback function. When creating one,
552 * take special care to avoid deadlocks. Things to bear in mind:
554 * - it will be called by cifsd, with no locks held
555 * - the mid will be removed from any lists
557 typedef void (mid_callback_t)(struct mid_q_entry *mid);
559 /* one of these for every pending CIFS request to the server */
561 struct list_head qhead; /* mids waiting on reply from this server */
562 __u16 mid; /* multiplex id */
563 __u16 pid; /* process id */
564 __u32 sequence_number; /* for CIFS signing */
565 unsigned long when_alloc; /* when mid was created */
566 #ifdef CONFIG_CIFS_STATS2
567 unsigned long when_sent; /* time when smb send finished */
568 unsigned long when_received; /* when demux complete (taken off wire) */
570 mid_callback_t *callback; /* call completion callback */
571 void *callback_data; /* general purpose pointer for callback */
572 struct smb_hdr *resp_buf; /* response buffer */
573 int midState; /* wish this were enum but can not pass to wait_event */
574 __u8 command; /* smb command code */
575 bool largeBuf:1; /* if valid response, is pointer to large buf */
576 bool multiRsp:1; /* multiple trans2 responses for one request */
577 bool multiEnd:1; /* both received */
580 struct oplock_q_entry {
581 struct list_head qhead;
582 struct inode *pinode;
583 struct cifsTconInfo *tcon;
587 /* for pending dnotify requests */
588 struct dir_notify_req {
589 struct list_head lhead;
596 __u32 filter; /* CompletionFilter (for multishot) */
601 struct dfs_info3_param {
602 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
611 * common struct for holding inode info when searching for or updating an
612 * inode with new info
615 #define CIFS_FATTR_DFS_REFERRAL 0x1
616 #define CIFS_FATTR_DELETE_PENDING 0x2
617 #define CIFS_FATTR_NEED_REVAL 0x4
618 #define CIFS_FATTR_INO_COLLISION 0x8
631 unsigned int cf_nlink;
632 unsigned int cf_dtype;
633 struct timespec cf_atime;
634 struct timespec cf_mtime;
635 struct timespec cf_ctime;
638 static inline void free_dfs_info_param(struct dfs_info3_param *param)
641 kfree(param->path_name);
642 kfree(param->node_name);
647 static inline void free_dfs_info_array(struct dfs_info3_param *param,
651 if ((number_of_items == 0) || (param == NULL))
653 for (i = 0; i < number_of_items; i++) {
654 kfree(param[i].path_name);
655 kfree(param[i].node_name);
661 #define MID_REQUEST_ALLOCATED 1
662 #define MID_REQUEST_SUBMITTED 2
663 #define MID_RESPONSE_RECEIVED 4
664 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
665 #define MID_RESPONSE_MALFORMED 0x10
666 #define MID_SHUTDOWN 0x20
668 /* Types of response buffer returned from SendReceive2 */
669 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
670 #define CIFS_SMALL_BUFFER 1
671 #define CIFS_LARGE_BUFFER 2
672 #define CIFS_IOVEC 4 /* array of response buffers */
674 /* Type of Request to SendReceive2 */
675 #define CIFS_BLOCKING_OP 1 /* operation can block */
676 #define CIFS_ASYNC_OP 2 /* do not wait for response */
677 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
678 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
679 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
680 #define CIFS_NO_RESP 0x040 /* no response buffer required */
682 /* Security Flags: indicate type of session setup needed */
683 #define CIFSSEC_MAY_SIGN 0x00001
684 #define CIFSSEC_MAY_NTLM 0x00002
685 #define CIFSSEC_MAY_NTLMV2 0x00004
686 #define CIFSSEC_MAY_KRB5 0x00008
687 #ifdef CONFIG_CIFS_WEAK_PW_HASH
688 #define CIFSSEC_MAY_LANMAN 0x00010
689 #define CIFSSEC_MAY_PLNTXT 0x00020
691 #define CIFSSEC_MAY_LANMAN 0
692 #define CIFSSEC_MAY_PLNTXT 0
693 #endif /* weak passwords */
694 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
695 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
697 #define CIFSSEC_MUST_SIGN 0x01001
698 /* note that only one of the following can be set so the
699 result of setting MUST flags more than once will be to
700 require use of the stronger protocol */
701 #define CIFSSEC_MUST_NTLM 0x02002
702 #define CIFSSEC_MUST_NTLMV2 0x04004
703 #define CIFSSEC_MUST_KRB5 0x08008
704 #ifdef CONFIG_CIFS_WEAK_PW_HASH
705 #define CIFSSEC_MUST_LANMAN 0x10010
706 #define CIFSSEC_MUST_PLNTXT 0x20020
707 #ifdef CONFIG_CIFS_UPCALL
708 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
710 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
712 #else /* do not allow weak pw hash */
713 #ifdef CONFIG_CIFS_UPCALL
714 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
716 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
718 #endif /* WEAK_PW_HASH */
719 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
720 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
722 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
723 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
724 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
726 *****************************************************************
727 * All constants go here
728 *****************************************************************
731 #define UID_HASH (16)
734 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
735 * following to be declared.
738 /****************************************************************************
739 * Locking notes. All updates to global variables and lists should be
740 * protected by spinlocks or semaphores.
744 * GlobalMid_Lock protects:
745 * list operations on pending_mid_q and oplockQ
746 * updates to XID counters, multiplex id and SMB sequence numbers
747 * cifs_file_list_lock protects:
748 * list operations on tcp and SMB session lists and tCon lists
749 * f_owner.lock protects certain per file struct operations
750 * mapping->page_lock protects certain per page operations
754 * sesSem operations on smb session
755 * tconSem operations on tree connection
756 * fh_sem file handle reconnection operations
758 ****************************************************************************/
760 #ifdef DECLARE_GLOBALS_HERE
761 #define GLOBAL_EXTERN
763 #define GLOBAL_EXTERN extern
767 * the list of TCP_Server_Info structures, ie each of the sockets
768 * connecting our client to a distinct server (ip address), is
769 * chained together by cifs_tcp_ses_list. The list of all our SMB
770 * sessions (and from that the tree connections) can be found
771 * by iterating over cifs_tcp_ses_list
773 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
776 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
777 * tcp session, and the list of tcon's per smb session. It also protects
778 * the reference counters for the server, smb session, and tcon. Finally,
779 * changes to the tcon->tidStatus should be done while holding this lock.
781 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
784 * This lock protects the cifs_file->llist and cifs_file->flist
785 * list operations, and updates to some flags (cifs_file->invalidHandle)
786 * It will be moved to either use the tcon->stat_lock or equivalent later.
787 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
788 * the cifs_tcp_ses_lock must be grabbed first and released last.
790 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
792 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
793 /* Outstanding dir notify requests */
794 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
795 /* DirNotify response queue */
796 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
797 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
800 * Global transaction id (XID) information
802 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
803 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
804 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
805 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
806 /* on midQ entries */
808 * Global counters, updated atomically
810 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
811 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
812 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
813 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
814 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
816 /* Various Debug counters */
817 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
818 #ifdef CONFIG_CIFS_STATS2
819 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
820 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
822 GLOBAL_EXTERN atomic_t smBufAllocCount;
823 GLOBAL_EXTERN atomic_t midCount;
826 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
827 to be established on existing mount if we
828 have the uid/password or Kerberos credential
829 or equivalent for current user */
830 GLOBAL_EXTERN unsigned int oplockEnabled;
831 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
832 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
833 with more secure ntlmssp2 challenge/resp */
834 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
835 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
836 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
837 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
838 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
839 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
841 /* reconnect after this many failed echo attempts */
842 GLOBAL_EXTERN unsigned short echo_retries;
844 GLOBAL_EXTERN struct rb_root uidtree;
845 GLOBAL_EXTERN struct rb_root gidtree;
846 GLOBAL_EXTERN spinlock_t siduidlock;
847 GLOBAL_EXTERN spinlock_t sidgidlock;
849 void cifs_oplock_break(struct work_struct *work);
850 void cifs_oplock_break_get(struct cifsFileInfo *cfile);
851 void cifs_oplock_break_put(struct cifsFileInfo *cfile);
853 extern const struct slow_work_ops cifs_oplock_break_ops;
855 #endif /* _CIFS_GLOB_H */