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 *****************************************************************
164 char *iocharset; /* local code page for mapping to and from Unicode */
165 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
166 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
180 bool no_psx_acl:1; /* set if posix acl support should be disabled */
182 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
183 bool server_ino:1; /* use inode numbers from server ie UniqueId */
185 bool strict_io:1; /* strict cache behavior */
186 bool remap:1; /* set to remap seven reserved chars in filenames */
187 bool posix_paths:1; /* unset to not ask for posix pathnames. */
190 bool nullauth:1; /* attempt to authenticate with null user */
191 bool nocase:1; /* request case insensitive filenames */
192 bool nobrl:1; /* disable sending byte range locks to srv */
193 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
194 bool seal:1; /* request transport encryption on share */
195 bool nodfs:1; /* Do not request DFS, even if available */
196 bool local_lease:1; /* check leases only on local system, not remote */
199 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
200 bool fsc:1; /* enable fscache */
201 bool mfsymlinks:1; /* use Minshall+French Symlinks */
205 bool sockopt_tcp_nodelay:1;
206 unsigned short int port;
207 unsigned long actimeo; /* attribute cache timeout (jiffies) */
209 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
210 struct nls_table *local_nls;
213 struct TCP_Server_Info {
214 struct list_head tcp_ses_list;
215 struct list_head smb_ses_list;
216 int srv_count; /* reference counter */
217 /* 15 character server name + 0x20 16th byte indicating type = srv */
218 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
219 enum statusEnum tcpStatus; /* what we think the status is */
220 char *hostname; /* hostname portion of UNC string */
221 struct socket *ssocket;
222 struct sockaddr_storage dstaddr;
223 struct sockaddr_storage srcaddr; /* locally bind to this IP */
227 wait_queue_head_t response_q;
228 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
229 struct list_head pending_mid_q;
230 bool noblocksnd; /* use blocking sendmsg */
231 bool noautotune; /* do not autotune send buf sizes */
233 atomic_t inFlight; /* number of requests on the wire to server */
234 struct mutex srv_mutex;
235 struct task_struct *tsk;
236 char server_GUID[16];
238 bool session_estab; /* mark when very first sess is established */
239 u16 dialect; /* dialect index that server chose */
240 enum securityEnum secType;
241 unsigned int maxReq; /* Clients should submit no more */
242 /* than maxReq distinct unanswered SMBs to the server when using */
243 /* multiplexed reads or writes */
244 unsigned int maxBuf; /* maxBuf specifies the maximum */
245 /* message size the server can send or receive for non-raw SMBs */
246 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
247 /* when socket is setup (and during reconnect) before NegProt sent */
248 unsigned int max_rw; /* maxRw specifies the maximum */
249 /* message size the server can send or receive for */
250 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
251 unsigned int max_vcs; /* maximum number of smb sessions, at least
252 those that can be specified uniquely with
254 int capabilities; /* allow selective disabling of caps by smb sess */
255 int timeAdj; /* Adjust for difference in server time zone in sec */
256 __u16 CurrentMid; /* multiplex id - rotating counter */
257 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
258 /* 16th byte of RFC1001 workstation name is always null */
259 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
260 __u32 sequence_number; /* for signing, protected by srv_mutex */
261 struct session_key session_key;
262 unsigned long lstrp; /* when we got last response from this server */
263 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
264 /* extended security flavors that server supports */
265 bool sec_ntlmssp; /* supports NTLMSSP */
266 bool sec_kerberosu2u; /* supports U2U Kerberos */
267 bool sec_kerberos; /* supports plain Kerberos */
268 bool sec_mskerberos; /* supports legacy MS Kerberos */
269 struct delayed_work echo; /* echo ping workqueue job */
270 #ifdef CONFIG_CIFS_FSCACHE
271 struct fscache_cookie *fscache; /* client index cache cookie */
273 #ifdef CONFIG_CIFS_STATS2
274 atomic_t inSend; /* requests trying to send */
275 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
280 * Macros to allow the TCP_Server_Info->net field and related code to drop out
281 * when CONFIG_NET_NS isn't set.
286 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
291 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
298 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
303 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
310 * Session structure. One of these for each uid session with a particular host
313 struct list_head smb_ses_list;
314 struct list_head tcon_list;
315 struct mutex session_mutex;
316 struct TCP_Server_Info *server; /* pointer to server info */
317 int ses_count; /* reference counter */
318 enum statusEnum status;
319 unsigned overrideSecFlg; /* if non-zero override global sec flags */
320 __u16 ipc_tid; /* special tid for connection to IPC share */
323 char *serverOS; /* name of operating system underlying server */
324 char *serverNOS; /* name of network operating system of server */
325 char *serverDomain; /* security realm of server */
326 int Suid; /* remote smb uid */
327 uid_t linux_uid; /* overriding owner of files on the mount */
328 uid_t cred_uid; /* owner of credentials */
330 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
331 TCP names - will ipv6 and sctp addresses fit? */
332 char *user_name; /* must not be null except during init of sess
333 and after mount option parsing we fill it */
336 struct session_key auth_key;
337 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
338 bool need_reconnect:1; /* connection reset, uid now invalid */
340 /* no more than one of the following three session flags may be set */
341 #define CIFS_SES_NT4 1
342 #define CIFS_SES_OS2 2
343 #define CIFS_SES_W9X 4
344 /* following flag is set for old servers such as OS2 (and Win95?)
345 which do not negotiate NTLM or POSIX dialects, but instead
346 negotiate one of the older LANMAN dialects */
347 #define CIFS_SES_LANMAN 8
349 * there is one of these for each connection to a resource on a particular
352 struct cifsTconInfo {
353 struct list_head tcon_list;
355 struct list_head openFileList;
356 struct cifsSesInfo *ses; /* pointer to session associated with */
357 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
358 char *nativeFileSystem;
359 char *password; /* for share-level security */
360 __u16 tid; /* The 2 byte tree id */
361 __u16 Flags; /* optional support bits */
362 enum statusEnum tidStatus;
363 #ifdef CONFIG_CIFS_STATS
364 atomic_t num_smbs_sent;
367 atomic_t num_flushes;
368 atomic_t num_oplock_brks;
371 atomic_t num_deletes;
373 atomic_t num_posixopens;
374 atomic_t num_posixmkdirs;
376 atomic_t num_renames;
377 atomic_t num_t2renames;
381 atomic_t num_hardlinks;
382 atomic_t num_symlinks;
384 atomic_t num_acl_get;
385 atomic_t num_acl_set;
386 #ifdef CONFIG_CIFS_STATS2
387 unsigned long long time_writes;
388 unsigned long long time_reads;
389 unsigned long long time_opens;
390 unsigned long long time_deletes;
391 unsigned long long time_closes;
392 unsigned long long time_mkdirs;
393 unsigned long long time_rmdirs;
394 unsigned long long time_renames;
395 unsigned long long time_t2renames;
396 unsigned long long time_ffirst;
397 unsigned long long time_fnext;
398 unsigned long long time_fclose;
399 #endif /* CONFIG_CIFS_STATS2 */
402 spinlock_t stat_lock;
403 #endif /* CONFIG_CIFS_STATS */
404 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
405 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
406 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
407 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
410 bool seal:1; /* transport encryption for this mounted share */
411 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
412 for this mount even if server would support */
413 bool local_lease:1; /* check leases (only) on local system not remote */
414 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
415 bool need_reconnect:1; /* connection reset, tid now invalid */
416 #ifdef CONFIG_CIFS_FSCACHE
417 u64 resource_id; /* server resource id */
418 struct fscache_cookie *fscache; /* cookie for share */
420 /* BB add field for back pointer to sb struct(s)? */
424 * This is a refcounted and timestamped container for a tcon pointer. The
425 * container holds a tcon reference. It is considered safe to free one of
426 * these when the tl_count goes to 0. The tl_time is the time of the last
427 * "get" on the container.
430 struct rb_node tl_rbnode;
432 unsigned long tl_flags;
433 #define TCON_LINK_MASTER 0
434 #define TCON_LINK_PENDING 1
435 #define TCON_LINK_IN_TREE 2
436 unsigned long tl_time;
438 struct cifsTconInfo *tl_tcon;
441 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
443 static inline struct cifsTconInfo *
444 tlink_tcon(struct tcon_link *tlink)
446 return tlink->tl_tcon;
449 extern void cifs_put_tlink(struct tcon_link *tlink);
451 static inline struct tcon_link *
452 cifs_get_tlink(struct tcon_link *tlink)
454 if (tlink && !IS_ERR(tlink))
455 atomic_inc(&tlink->tl_count);
459 /* This function is always expected to succeed */
460 extern struct cifsTconInfo *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
463 * This info hangs off the cifsFileInfo structure, pointed to by llist.
464 * This is used to track byte stream locks on the file
466 struct cifsLockInfo {
467 struct list_head llist; /* pointer to next cifsLockInfo */
474 * One of these for each open instance of a file
476 struct cifs_search_info {
477 loff_t index_of_last_entry;
478 __u16 entries_in_buffer;
481 char *ntwrk_buf_start;
482 char *srch_entries_start;
485 unsigned int resume_name_len;
489 bool smallBuf:1; /* so we know which buf_release function to call */
492 struct cifsFileInfo {
493 struct list_head tlist; /* pointer to next fid owned by tcon */
494 struct list_head flist; /* next fid (file instance) for this inode */
495 unsigned int uid; /* allows finding which FileInfo structure */
496 __u32 pid; /* process id who opened file */
497 __u16 netfid; /* file id from remote */
498 /* BB add lock scope info here if needed */ ;
499 /* lock scope id (0 if none) */
500 struct dentry *dentry;
501 unsigned int f_flags;
502 struct tcon_link *tlink;
503 struct mutex lock_mutex;
504 struct list_head llist; /* list of byte range locks we have. */
505 bool invalidHandle:1; /* file closed via session abend */
506 bool oplock_break_cancelled:1;
507 int count; /* refcount protected by cifs_file_list_lock */
508 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
509 struct cifs_search_info srch_inf;
510 struct work_struct oplock_break; /* work for oplock breaks */
513 struct cifs_io_parms {
518 struct cifsTconInfo *tcon;
522 * Take a reference on the file private data. Must be called with
523 * cifs_file_list_lock held.
525 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
530 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
533 * One of these for each file inode
536 struct cifsInodeInfo {
537 struct list_head lockList;
538 /* BB add in lists for dirty pages i.e. write caching info for oplock */
539 struct list_head openFileList;
540 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
541 bool clientCanCacheRead; /* read oplock */
542 bool clientCanCacheAll; /* read and writebehind oplock */
543 bool delete_pending; /* DELETE_ON_CLOSE is set */
544 bool invalid_mapping; /* pagecache is invalid */
545 unsigned long time; /* jiffies of last update of inode */
546 u64 server_eof; /* current file size on server */
547 u64 uniqueid; /* server inode number */
548 u64 createtime; /* creation time on server */
549 #ifdef CONFIG_CIFS_FSCACHE
550 struct fscache_cookie *fscache;
552 struct inode vfs_inode;
555 static inline struct cifsInodeInfo *
556 CIFS_I(struct inode *inode)
558 return container_of(inode, struct cifsInodeInfo, vfs_inode);
561 static inline struct cifs_sb_info *
562 CIFS_SB(struct super_block *sb)
564 return sb->s_fs_info;
567 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
569 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
576 convert_delimiter(char *path, char delim)
589 for (i = 0; path[i] != '\0'; i++) {
590 if (path[i] == old_delim)
595 #ifdef CONFIG_CIFS_STATS
596 #define cifs_stats_inc atomic_inc
598 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
602 spin_lock(&tcon->stat_lock);
603 tcon->bytes_written += bytes;
604 spin_unlock(&tcon->stat_lock);
608 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
611 spin_lock(&tcon->stat_lock);
612 tcon->bytes_read += bytes;
613 spin_unlock(&tcon->stat_lock);
617 #define cifs_stats_inc(field) do {} while (0)
618 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
619 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
626 * This is the prototype for the mid callback function. When creating one,
627 * take special care to avoid deadlocks. Things to bear in mind:
629 * - it will be called by cifsd, with no locks held
630 * - the mid will be removed from any lists
632 typedef void (mid_callback_t)(struct mid_q_entry *mid);
634 /* one of these for every pending CIFS request to the server */
636 struct list_head qhead; /* mids waiting on reply from this server */
637 __u16 mid; /* multiplex id */
638 __u16 pid; /* process id */
639 __u32 sequence_number; /* for CIFS signing */
640 unsigned long when_alloc; /* when mid was created */
641 #ifdef CONFIG_CIFS_STATS2
642 unsigned long when_sent; /* time when smb send finished */
643 unsigned long when_received; /* when demux complete (taken off wire) */
645 mid_callback_t *callback; /* call completion callback */
646 void *callback_data; /* general purpose pointer for callback */
647 struct smb_hdr *resp_buf; /* response buffer */
648 int midState; /* wish this were enum but can not pass to wait_event */
649 __u8 command; /* smb command code */
650 bool largeBuf:1; /* if valid response, is pointer to large buf */
651 bool multiRsp:1; /* multiple trans2 responses for one request */
652 bool multiEnd:1; /* both received */
655 struct oplock_q_entry {
656 struct list_head qhead;
657 struct inode *pinode;
658 struct cifsTconInfo *tcon;
662 /* for pending dnotify requests */
663 struct dir_notify_req {
664 struct list_head lhead;
671 __u32 filter; /* CompletionFilter (for multishot) */
676 struct dfs_info3_param {
677 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
686 * common struct for holding inode info when searching for or updating an
687 * inode with new info
690 #define CIFS_FATTR_DFS_REFERRAL 0x1
691 #define CIFS_FATTR_DELETE_PENDING 0x2
692 #define CIFS_FATTR_NEED_REVAL 0x4
693 #define CIFS_FATTR_INO_COLLISION 0x8
706 unsigned int cf_nlink;
707 unsigned int cf_dtype;
708 struct timespec cf_atime;
709 struct timespec cf_mtime;
710 struct timespec cf_ctime;
713 static inline void free_dfs_info_param(struct dfs_info3_param *param)
716 kfree(param->path_name);
717 kfree(param->node_name);
722 static inline void free_dfs_info_array(struct dfs_info3_param *param,
726 if ((number_of_items == 0) || (param == NULL))
728 for (i = 0; i < number_of_items; i++) {
729 kfree(param[i].path_name);
730 kfree(param[i].node_name);
736 #define MID_REQUEST_ALLOCATED 1
737 #define MID_REQUEST_SUBMITTED 2
738 #define MID_RESPONSE_RECEIVED 4
739 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
740 #define MID_RESPONSE_MALFORMED 0x10
741 #define MID_SHUTDOWN 0x20
743 /* Types of response buffer returned from SendReceive2 */
744 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
745 #define CIFS_SMALL_BUFFER 1
746 #define CIFS_LARGE_BUFFER 2
747 #define CIFS_IOVEC 4 /* array of response buffers */
749 /* Type of Request to SendReceive2 */
750 #define CIFS_BLOCKING_OP 1 /* operation can block */
751 #define CIFS_ASYNC_OP 2 /* do not wait for response */
752 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
753 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
754 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
755 #define CIFS_NO_RESP 0x040 /* no response buffer required */
757 /* Security Flags: indicate type of session setup needed */
758 #define CIFSSEC_MAY_SIGN 0x00001
759 #define CIFSSEC_MAY_NTLM 0x00002
760 #define CIFSSEC_MAY_NTLMV2 0x00004
761 #define CIFSSEC_MAY_KRB5 0x00008
762 #ifdef CONFIG_CIFS_WEAK_PW_HASH
763 #define CIFSSEC_MAY_LANMAN 0x00010
764 #define CIFSSEC_MAY_PLNTXT 0x00020
766 #define CIFSSEC_MAY_LANMAN 0
767 #define CIFSSEC_MAY_PLNTXT 0
768 #endif /* weak passwords */
769 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
770 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
772 #define CIFSSEC_MUST_SIGN 0x01001
773 /* note that only one of the following can be set so the
774 result of setting MUST flags more than once will be to
775 require use of the stronger protocol */
776 #define CIFSSEC_MUST_NTLM 0x02002
777 #define CIFSSEC_MUST_NTLMV2 0x04004
778 #define CIFSSEC_MUST_KRB5 0x08008
779 #ifdef CONFIG_CIFS_WEAK_PW_HASH
780 #define CIFSSEC_MUST_LANMAN 0x10010
781 #define CIFSSEC_MUST_PLNTXT 0x20020
782 #ifdef CONFIG_CIFS_UPCALL
783 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
785 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
787 #else /* do not allow weak pw hash */
788 #ifdef CONFIG_CIFS_UPCALL
789 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
791 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
793 #endif /* WEAK_PW_HASH */
794 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
795 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
797 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
798 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
799 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
801 *****************************************************************
802 * All constants go here
803 *****************************************************************
806 #define UID_HASH (16)
809 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
810 * following to be declared.
813 /****************************************************************************
814 * Locking notes. All updates to global variables and lists should be
815 * protected by spinlocks or semaphores.
819 * GlobalMid_Lock protects:
820 * list operations on pending_mid_q and oplockQ
821 * updates to XID counters, multiplex id and SMB sequence numbers
822 * cifs_file_list_lock protects:
823 * list operations on tcp and SMB session lists and tCon lists
824 * f_owner.lock protects certain per file struct operations
825 * mapping->page_lock protects certain per page operations
829 * sesSem operations on smb session
830 * tconSem operations on tree connection
831 * fh_sem file handle reconnection operations
833 ****************************************************************************/
835 #ifdef DECLARE_GLOBALS_HERE
836 #define GLOBAL_EXTERN
838 #define GLOBAL_EXTERN extern
842 * the list of TCP_Server_Info structures, ie each of the sockets
843 * connecting our client to a distinct server (ip address), is
844 * chained together by cifs_tcp_ses_list. The list of all our SMB
845 * sessions (and from that the tree connections) can be found
846 * by iterating over cifs_tcp_ses_list
848 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
851 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
852 * tcp session, and the list of tcon's per smb session. It also protects
853 * the reference counters for the server, smb session, and tcon. Finally,
854 * changes to the tcon->tidStatus should be done while holding this lock.
856 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
859 * This lock protects the cifs_file->llist and cifs_file->flist
860 * list operations, and updates to some flags (cifs_file->invalidHandle)
861 * It will be moved to either use the tcon->stat_lock or equivalent later.
862 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
863 * the cifs_tcp_ses_lock must be grabbed first and released last.
865 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
867 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
868 /* Outstanding dir notify requests */
869 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
870 /* DirNotify response queue */
871 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
872 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
875 * Global transaction id (XID) information
877 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
878 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
879 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
880 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
881 /* on midQ entries */
883 * Global counters, updated atomically
885 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
886 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
887 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
888 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
889 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
891 /* Various Debug counters */
892 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
893 #ifdef CONFIG_CIFS_STATS2
894 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
895 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
897 GLOBAL_EXTERN atomic_t smBufAllocCount;
898 GLOBAL_EXTERN atomic_t midCount;
901 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
902 to be established on existing mount if we
903 have the uid/password or Kerberos credential
904 or equivalent for current user */
905 GLOBAL_EXTERN unsigned int oplockEnabled;
906 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
907 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
908 with more secure ntlmssp2 challenge/resp */
909 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
910 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
911 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
912 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
913 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
914 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
916 /* reconnect after this many failed echo attempts */
917 GLOBAL_EXTERN unsigned short echo_retries;
919 GLOBAL_EXTERN struct rb_root uidtree;
920 GLOBAL_EXTERN struct rb_root gidtree;
921 GLOBAL_EXTERN spinlock_t siduidlock;
922 GLOBAL_EXTERN spinlock_t sidgidlock;
924 void cifs_oplock_break(struct work_struct *work);
925 void cifs_oplock_break_get(struct cifsFileInfo *cfile);
926 void cifs_oplock_break_put(struct cifsFileInfo *cfile);
928 extern const struct slow_work_ops cifs_oplock_break_ops;
930 #endif /* _CIFS_GLOB_H */