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
46 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
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.
61 #define CIFS_MAX_REQ 32767
63 #define RFC1001_NAME_LEN 15
64 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
66 /* currently length of NIP6_FMT */
67 #define SERVER_NAME_LENGTH 40
68 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
70 /* used to define string lengths for reversing unicode strings */
72 /* (max path length + 1 for null) * 2 for unicode */
77 #ifndef XATTR_DOS_ATTRIB
78 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
82 * CIFS vfs client Status information (based on what we know.)
85 /* associated with each tcp and smb session */
95 LANMAN = 0, /* Legacy LANMAN auth */
96 NTLM, /* Legacy NTLM012 auth with NTLM hash */
97 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
98 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
99 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
100 Kerberos, /* Kerberos via SPNEGO */
106 /* Netbios frames protocol not supported at this time */
114 /* crypto security descriptor definition */
116 struct shash_desc shash;
120 /* crypto hashing related structure/fields, not specific to a sec mech */
121 struct cifs_secmech {
122 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
123 struct crypto_shash *md5; /* md5 hash function */
124 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
125 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
128 /* per smb session structure/fields */
129 struct ntlmssp_auth {
130 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
131 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
132 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
133 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
141 struct cifs_sid osid;
142 struct cifs_sid gsid;
143 struct cifs_ntace *ntaces;
144 struct cifs_ace *aces;
148 *****************************************************************
149 * Except the CIFS PDUs themselves all the
150 * globally interesting structs should go here
151 *****************************************************************
160 char *iocharset; /* local code page for mapping to and from Unicode */
161 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
162 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
178 bool no_psx_acl:1; /* set if posix acl support should be disabled */
180 bool backupuid_specified; /* mount option backupuid is specified */
181 bool backupgid_specified; /* mount option backupgid is specified */
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 */
203 bool rwpidforward:1; /* pid forward for read/write operations */
206 bool sockopt_tcp_nodelay:1;
207 unsigned short int port;
208 unsigned long actimeo; /* attribute cache timeout (jiffies) */
210 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
211 struct nls_table *local_nls;
214 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
215 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
216 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
217 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
218 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
219 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
220 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
221 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
222 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
223 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
225 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
226 MS_NODEV | MS_SYNCHRONOUS)
228 struct cifs_mnt_data {
229 struct cifs_sb_info *cifs_sb;
234 struct TCP_Server_Info {
235 struct list_head tcp_ses_list;
236 struct list_head smb_ses_list;
237 int srv_count; /* reference counter */
238 /* 15 character server name + 0x20 16th byte indicating type = srv */
239 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
240 enum statusEnum tcpStatus; /* what we think the status is */
241 char *hostname; /* hostname portion of UNC string */
242 struct socket *ssocket;
243 struct sockaddr_storage dstaddr;
244 struct sockaddr_storage srcaddr; /* locally bind to this IP */
248 wait_queue_head_t response_q;
249 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
250 struct list_head pending_mid_q;
251 bool noblocksnd; /* use blocking sendmsg */
252 bool noautotune; /* do not autotune send buf sizes */
254 atomic_t inFlight; /* number of requests on the wire to server */
255 struct mutex srv_mutex;
256 struct task_struct *tsk;
257 char server_GUID[16];
259 bool session_estab; /* mark when very first sess is established */
260 u16 dialect; /* dialect index that server chose */
261 enum securityEnum secType;
262 bool oplocks:1; /* enable oplocks */
263 unsigned int maxReq; /* Clients should submit no more */
264 /* than maxReq distinct unanswered SMBs to the server when using */
265 /* multiplexed reads or writes */
266 unsigned int maxBuf; /* maxBuf specifies the maximum */
267 /* message size the server can send or receive for non-raw SMBs */
268 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
269 /* when socket is setup (and during reconnect) before NegProt sent */
270 unsigned int max_rw; /* maxRw specifies the maximum */
271 /* message size the server can send or receive for */
272 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
273 unsigned int max_vcs; /* maximum number of smb sessions, at least
274 those that can be specified uniquely with
276 int capabilities; /* allow selective disabling of caps by smb sess */
277 int timeAdj; /* Adjust for difference in server time zone in sec */
278 __u16 CurrentMid; /* multiplex id - rotating counter */
279 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
280 /* 16th byte of RFC1001 workstation name is always null */
281 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
282 __u32 sequence_number; /* for signing, protected by srv_mutex */
283 struct session_key session_key;
284 unsigned long lstrp; /* when we got last response from this server */
285 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
286 /* extended security flavors that server supports */
287 bool sec_ntlmssp; /* supports NTLMSSP */
288 bool sec_kerberosu2u; /* supports U2U Kerberos */
289 bool sec_kerberos; /* supports plain Kerberos */
290 bool sec_mskerberos; /* supports legacy MS Kerberos */
291 bool large_buf; /* is current buffer large? */
292 struct delayed_work echo; /* echo ping workqueue job */
293 struct kvec *iov; /* reusable kvec array for receives */
294 unsigned int nr_iov; /* number of kvecs in array */
295 char *smallbuf; /* pointer to current "small" buffer */
296 char *bigbuf; /* pointer to current "big" buffer */
297 unsigned int total_read; /* total amount of data read in this pass */
298 #ifdef CONFIG_CIFS_FSCACHE
299 struct fscache_cookie *fscache; /* client index cache cookie */
301 #ifdef CONFIG_CIFS_STATS2
302 atomic_t in_send; /* requests trying to send */
303 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
308 * Macros to allow the TCP_Server_Info->net field and related code to drop out
309 * when CONFIG_NET_NS isn't set.
314 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
319 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
326 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
331 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
338 * Session structure. One of these for each uid session with a particular host
341 struct list_head smb_ses_list;
342 struct list_head tcon_list;
343 struct mutex session_mutex;
344 struct TCP_Server_Info *server; /* pointer to server info */
345 int ses_count; /* reference counter */
346 enum statusEnum status;
347 unsigned overrideSecFlg; /* if non-zero override global sec flags */
348 __u16 ipc_tid; /* special tid for connection to IPC share */
351 char *serverOS; /* name of operating system underlying server */
352 char *serverNOS; /* name of network operating system of server */
353 char *serverDomain; /* security realm of server */
354 int Suid; /* remote smb uid */
355 uid_t linux_uid; /* overriding owner of files on the mount */
356 uid_t cred_uid; /* owner of credentials */
358 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
359 TCP names - will ipv6 and sctp addresses fit? */
360 char *user_name; /* must not be null except during init of sess
361 and after mount option parsing we fill it */
364 struct session_key auth_key;
365 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
366 bool need_reconnect:1; /* connection reset, uid now invalid */
368 /* no more than one of the following three session flags may be set */
369 #define CIFS_SES_NT4 1
370 #define CIFS_SES_OS2 2
371 #define CIFS_SES_W9X 4
372 /* following flag is set for old servers such as OS2 (and Win95?)
373 which do not negotiate NTLM or POSIX dialects, but instead
374 negotiate one of the older LANMAN dialects */
375 #define CIFS_SES_LANMAN 8
377 * there is one of these for each connection to a resource on a particular
381 struct list_head tcon_list;
383 struct list_head openFileList;
384 struct cifs_ses *ses; /* pointer to session associated with */
385 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
386 char *nativeFileSystem;
387 char *password; /* for share-level security */
388 __u16 tid; /* The 2 byte tree id */
389 __u16 Flags; /* optional support bits */
390 enum statusEnum tidStatus;
391 #ifdef CONFIG_CIFS_STATS
392 atomic_t num_smbs_sent;
395 atomic_t num_flushes;
396 atomic_t num_oplock_brks;
399 atomic_t num_deletes;
401 atomic_t num_posixopens;
402 atomic_t num_posixmkdirs;
404 atomic_t num_renames;
405 atomic_t num_t2renames;
409 atomic_t num_hardlinks;
410 atomic_t num_symlinks;
412 atomic_t num_acl_get;
413 atomic_t num_acl_set;
414 #ifdef CONFIG_CIFS_STATS2
415 unsigned long long time_writes;
416 unsigned long long time_reads;
417 unsigned long long time_opens;
418 unsigned long long time_deletes;
419 unsigned long long time_closes;
420 unsigned long long time_mkdirs;
421 unsigned long long time_rmdirs;
422 unsigned long long time_renames;
423 unsigned long long time_t2renames;
424 unsigned long long time_ffirst;
425 unsigned long long time_fnext;
426 unsigned long long time_fclose;
427 #endif /* CONFIG_CIFS_STATS2 */
430 spinlock_t stat_lock;
431 #endif /* CONFIG_CIFS_STATS */
432 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
433 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
434 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
435 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
438 bool seal:1; /* transport encryption for this mounted share */
439 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
440 for this mount even if server would support */
441 bool local_lease:1; /* check leases (only) on local system not remote */
442 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
443 bool need_reconnect:1; /* connection reset, tid now invalid */
444 #ifdef CONFIG_CIFS_FSCACHE
445 u64 resource_id; /* server resource id */
446 struct fscache_cookie *fscache; /* cookie for share */
448 /* BB add field for back pointer to sb struct(s)? */
452 * This is a refcounted and timestamped container for a tcon pointer. The
453 * container holds a tcon reference. It is considered safe to free one of
454 * these when the tl_count goes to 0. The tl_time is the time of the last
455 * "get" on the container.
458 struct rb_node tl_rbnode;
460 unsigned long tl_flags;
461 #define TCON_LINK_MASTER 0
462 #define TCON_LINK_PENDING 1
463 #define TCON_LINK_IN_TREE 2
464 unsigned long tl_time;
466 struct cifs_tcon *tl_tcon;
469 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
471 static inline struct cifs_tcon *
472 tlink_tcon(struct tcon_link *tlink)
474 return tlink->tl_tcon;
477 extern void cifs_put_tlink(struct tcon_link *tlink);
479 static inline struct tcon_link *
480 cifs_get_tlink(struct tcon_link *tlink)
482 if (tlink && !IS_ERR(tlink))
483 atomic_inc(&tlink->tl_count);
487 /* This function is always expected to succeed */
488 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
491 * This info hangs off the cifsFileInfo structure, pointed to by llist.
492 * This is used to track byte stream locks on the file
494 struct cifsLockInfo {
495 struct list_head llist; /* pointer to next cifsLockInfo */
496 struct list_head blist; /* pointer to locks blocked on this */
497 wait_queue_head_t block_q;
506 * One of these for each open instance of a file
508 struct cifs_search_info {
509 loff_t index_of_last_entry;
510 __u16 entries_in_buffer;
513 char *ntwrk_buf_start;
514 char *srch_entries_start;
516 const char *presume_name;
517 unsigned int resume_name_len;
521 bool smallBuf:1; /* so we know which buf_release function to call */
524 struct cifsFileInfo {
525 struct list_head tlist; /* pointer to next fid owned by tcon */
526 struct list_head flist; /* next fid (file instance) for this inode */
527 unsigned int uid; /* allows finding which FileInfo structure */
528 __u32 pid; /* process id who opened file */
529 __u16 netfid; /* file id from remote */
530 /* BB add lock scope info here if needed */ ;
531 /* lock scope id (0 if none) */
532 struct dentry *dentry;
533 unsigned int f_flags;
534 struct tcon_link *tlink;
535 bool invalidHandle:1; /* file closed via session abend */
536 bool oplock_break_cancelled:1;
537 int count; /* refcount protected by cifs_file_list_lock */
538 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
539 struct cifs_search_info srch_inf;
540 struct work_struct oplock_break; /* work for oplock breaks */
543 struct cifs_io_parms {
548 struct cifs_tcon *tcon;
552 * Take a reference on the file private data. Must be called with
553 * cifs_file_list_lock held.
555 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
560 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
563 * One of these for each file inode
566 struct cifsInodeInfo {
567 struct list_head llist; /* brlocks for this inode */
568 bool can_cache_brlcks;
569 struct mutex lock_mutex; /* protect two fields above */
570 /* BB add in lists for dirty pages i.e. write caching info for oplock */
571 struct list_head openFileList;
572 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
573 bool clientCanCacheRead; /* read oplock */
574 bool clientCanCacheAll; /* read and writebehind oplock */
575 bool delete_pending; /* DELETE_ON_CLOSE is set */
576 bool invalid_mapping; /* pagecache is invalid */
577 unsigned long time; /* jiffies of last update of inode */
578 u64 server_eof; /* current file size on server */
579 u64 uniqueid; /* server inode number */
580 u64 createtime; /* creation time on server */
581 #ifdef CONFIG_CIFS_FSCACHE
582 struct fscache_cookie *fscache;
584 struct inode vfs_inode;
587 static inline struct cifsInodeInfo *
588 CIFS_I(struct inode *inode)
590 return container_of(inode, struct cifsInodeInfo, vfs_inode);
593 static inline struct cifs_sb_info *
594 CIFS_SB(struct super_block *sb)
596 return sb->s_fs_info;
599 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
601 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
608 convert_delimiter(char *path, char delim)
621 for (i = 0; path[i] != '\0'; i++) {
622 if (path[i] == old_delim)
627 #ifdef CONFIG_CIFS_STATS
628 #define cifs_stats_inc atomic_inc
630 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
634 spin_lock(&tcon->stat_lock);
635 tcon->bytes_written += bytes;
636 spin_unlock(&tcon->stat_lock);
640 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
643 spin_lock(&tcon->stat_lock);
644 tcon->bytes_read += bytes;
645 spin_unlock(&tcon->stat_lock);
649 #define cifs_stats_inc(field) do {} while (0)
650 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
651 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
658 * This is the prototype for the mid receive function. This function is for
659 * receiving the rest of the SMB frame, starting with the WordCount (which is
660 * just after the MID in struct smb_hdr). Note:
662 * - This will be called by cifsd, with no locks held.
663 * - The mid will still be on the pending_mid_q.
664 * - mid->resp_buf will point to the current buffer.
666 * Returns zero on a successful receive, or an error. The receive state in
667 * the TCP_Server_Info will also be updated.
669 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
670 struct mid_q_entry *mid);
673 * This is the prototype for the mid callback function. This is called once the
674 * mid has been received off of the socket. When creating one, take special
675 * care to avoid deadlocks. Things to bear in mind:
677 * - it will be called by cifsd, with no locks held
678 * - the mid will be removed from any lists
680 typedef void (mid_callback_t)(struct mid_q_entry *mid);
682 /* one of these for every pending CIFS request to the server */
684 struct list_head qhead; /* mids waiting on reply from this server */
685 __u16 mid; /* multiplex id */
686 __u16 pid; /* process id */
687 __u32 sequence_number; /* for CIFS signing */
688 unsigned long when_alloc; /* when mid was created */
689 #ifdef CONFIG_CIFS_STATS2
690 unsigned long when_sent; /* time when smb send finished */
691 unsigned long when_received; /* when demux complete (taken off wire) */
693 mid_receive_t *receive; /* call receive callback */
694 mid_callback_t *callback; /* call completion callback */
695 void *callback_data; /* general purpose pointer for callback */
696 struct smb_hdr *resp_buf; /* pointer to received SMB header */
697 int midState; /* wish this were enum but can not pass to wait_event */
698 __u8 command; /* smb command code */
699 bool largeBuf:1; /* if valid response, is pointer to large buf */
700 bool multiRsp:1; /* multiple trans2 responses for one request */
701 bool multiEnd:1; /* both received */
704 /* Make code in transport.c a little cleaner by moving
705 update of optional stats into function below */
706 #ifdef CONFIG_CIFS_STATS2
708 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
710 atomic_inc(&server->in_send);
713 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
715 atomic_dec(&server->in_send);
718 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
720 atomic_inc(&server->num_waiters);
723 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
725 atomic_dec(&server->num_waiters);
728 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
730 mid->when_sent = jiffies;
733 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
736 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
740 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
744 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
748 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
753 /* for pending dnotify requests */
754 struct dir_notify_req {
755 struct list_head lhead;
762 __u32 filter; /* CompletionFilter (for multishot) */
767 struct dfs_info3_param {
768 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
777 * common struct for holding inode info when searching for or updating an
778 * inode with new info
781 #define CIFS_FATTR_DFS_REFERRAL 0x1
782 #define CIFS_FATTR_DELETE_PENDING 0x2
783 #define CIFS_FATTR_NEED_REVAL 0x4
784 #define CIFS_FATTR_INO_COLLISION 0x8
797 unsigned int cf_nlink;
798 unsigned int cf_dtype;
799 struct timespec cf_atime;
800 struct timespec cf_mtime;
801 struct timespec cf_ctime;
804 static inline void free_dfs_info_param(struct dfs_info3_param *param)
807 kfree(param->path_name);
808 kfree(param->node_name);
813 static inline void free_dfs_info_array(struct dfs_info3_param *param,
817 if ((number_of_items == 0) || (param == NULL))
819 for (i = 0; i < number_of_items; i++) {
820 kfree(param[i].path_name);
821 kfree(param[i].node_name);
827 #define MID_REQUEST_ALLOCATED 1
828 #define MID_REQUEST_SUBMITTED 2
829 #define MID_RESPONSE_RECEIVED 4
830 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
831 #define MID_RESPONSE_MALFORMED 0x10
832 #define MID_SHUTDOWN 0x20
834 /* Types of response buffer returned from SendReceive2 */
835 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
836 #define CIFS_SMALL_BUFFER 1
837 #define CIFS_LARGE_BUFFER 2
838 #define CIFS_IOVEC 4 /* array of response buffers */
840 /* Type of Request to SendReceive2 */
841 #define CIFS_BLOCKING_OP 1 /* operation can block */
842 #define CIFS_ASYNC_OP 2 /* do not wait for response */
843 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
844 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
845 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
846 #define CIFS_NO_RESP 0x040 /* no response buffer required */
848 /* Security Flags: indicate type of session setup needed */
849 #define CIFSSEC_MAY_SIGN 0x00001
850 #define CIFSSEC_MAY_NTLM 0x00002
851 #define CIFSSEC_MAY_NTLMV2 0x00004
852 #define CIFSSEC_MAY_KRB5 0x00008
853 #ifdef CONFIG_CIFS_WEAK_PW_HASH
854 #define CIFSSEC_MAY_LANMAN 0x00010
855 #define CIFSSEC_MAY_PLNTXT 0x00020
857 #define CIFSSEC_MAY_LANMAN 0
858 #define CIFSSEC_MAY_PLNTXT 0
859 #endif /* weak passwords */
860 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
861 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
863 #define CIFSSEC_MUST_SIGN 0x01001
864 /* note that only one of the following can be set so the
865 result of setting MUST flags more than once will be to
866 require use of the stronger protocol */
867 #define CIFSSEC_MUST_NTLM 0x02002
868 #define CIFSSEC_MUST_NTLMV2 0x04004
869 #define CIFSSEC_MUST_KRB5 0x08008
870 #ifdef CONFIG_CIFS_WEAK_PW_HASH
871 #define CIFSSEC_MUST_LANMAN 0x10010
872 #define CIFSSEC_MUST_PLNTXT 0x20020
873 #ifdef CONFIG_CIFS_UPCALL
874 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
876 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
878 #else /* do not allow weak pw hash */
879 #ifdef CONFIG_CIFS_UPCALL
880 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
882 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
884 #endif /* WEAK_PW_HASH */
885 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
886 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
888 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
889 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
890 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
892 *****************************************************************
893 * All constants go here
894 *****************************************************************
897 #define UID_HASH (16)
900 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
901 * following to be declared.
904 /****************************************************************************
905 * Locking notes. All updates to global variables and lists should be
906 * protected by spinlocks or semaphores.
910 * GlobalMid_Lock protects:
911 * list operations on pending_mid_q and oplockQ
912 * updates to XID counters, multiplex id and SMB sequence numbers
913 * cifs_file_list_lock protects:
914 * list operations on tcp and SMB session lists and tCon lists
915 * f_owner.lock protects certain per file struct operations
916 * mapping->page_lock protects certain per page operations
920 * sesSem operations on smb session
921 * tconSem operations on tree connection
922 * fh_sem file handle reconnection operations
924 ****************************************************************************/
926 #ifdef DECLARE_GLOBALS_HERE
927 #define GLOBAL_EXTERN
929 #define GLOBAL_EXTERN extern
933 * the list of TCP_Server_Info structures, ie each of the sockets
934 * connecting our client to a distinct server (ip address), is
935 * chained together by cifs_tcp_ses_list. The list of all our SMB
936 * sessions (and from that the tree connections) can be found
937 * by iterating over cifs_tcp_ses_list
939 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
942 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
943 * tcp session, and the list of tcon's per smb session. It also protects
944 * the reference counters for the server, smb session, and tcon. Finally,
945 * changes to the tcon->tidStatus should be done while holding this lock.
947 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
950 * This lock protects the cifs_file->llist and cifs_file->flist
951 * list operations, and updates to some flags (cifs_file->invalidHandle)
952 * It will be moved to either use the tcon->stat_lock or equivalent later.
953 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
954 * the cifs_tcp_ses_lock must be grabbed first and released last.
956 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
958 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
959 /* Outstanding dir notify requests */
960 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
961 /* DirNotify response queue */
962 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
963 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
966 * Global transaction id (XID) information
968 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
969 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
970 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
971 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
972 /* on midQ entries */
974 * Global counters, updated atomically
976 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
977 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
978 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
979 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
980 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
982 /* Various Debug counters */
983 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
984 #ifdef CONFIG_CIFS_STATS2
985 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
986 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
988 GLOBAL_EXTERN atomic_t smBufAllocCount;
989 GLOBAL_EXTERN atomic_t midCount;
992 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
993 to be established on existing mount if we
994 have the uid/password or Kerberos credential
995 or equivalent for current user */
996 /* enable or disable oplocks */
997 GLOBAL_EXTERN bool enable_oplocks;
998 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
999 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1000 with more secure ntlmssp2 challenge/resp */
1001 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1002 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1003 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1004 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1005 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1006 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1008 /* reconnect after this many failed echo attempts */
1009 GLOBAL_EXTERN unsigned short echo_retries;
1011 #ifdef CONFIG_CIFS_ACL
1012 GLOBAL_EXTERN struct rb_root uidtree;
1013 GLOBAL_EXTERN struct rb_root gidtree;
1014 GLOBAL_EXTERN spinlock_t siduidlock;
1015 GLOBAL_EXTERN spinlock_t sidgidlock;
1016 GLOBAL_EXTERN struct rb_root siduidtree;
1017 GLOBAL_EXTERN struct rb_root sidgidtree;
1018 GLOBAL_EXTERN spinlock_t uidsidlock;
1019 GLOBAL_EXTERN spinlock_t gidsidlock;
1020 #endif /* CONFIG_CIFS_ACL */
1022 void cifs_oplock_break(struct work_struct *work);
1024 extern const struct slow_work_ops cifs_oplock_break_ops;
1026 #endif /* _CIFS_GLOB_H */