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 CIFS_MAX_DOMAINNAME_LEN 256 /* max domain name length */
42 #define MAX_USERNAME_SIZE 256 /* reasonable maximum for current servers */
43 #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
45 #define CIFS_MIN_RCV_POOL 4
47 #define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
49 * default attribute cache timeout (jiffies)
51 #define CIFS_DEF_ACTIMEO (1 * HZ)
54 * max attribute cache timeout (jiffies) - 2^30
56 #define CIFS_MAX_ACTIMEO (1 << 30)
59 * MAX_REQ is the maximum number of requests that WE will send
60 * on one socket concurrently.
62 #define CIFS_MAX_REQ 32767
64 #define RFC1001_NAME_LEN 15
65 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
67 /* currently length of NIP6_FMT */
68 #define SERVER_NAME_LENGTH 40
69 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
71 /* used to define string lengths for reversing unicode strings */
73 /* (max path length + 1 for null) * 2 for unicode */
78 #ifndef XATTR_DOS_ATTRIB
79 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
83 * CIFS vfs client Status information (based on what we know.)
86 /* associated with each tcp and smb session */
96 LANMAN = 0, /* Legacy LANMAN auth */
97 NTLM, /* Legacy NTLM012 auth with NTLM hash */
98 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
99 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
100 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
101 Kerberos, /* Kerberos via SPNEGO */
107 /* Netbios frames protocol not supported at this time */
115 /* crypto security descriptor definition */
117 struct shash_desc shash;
121 /* crypto hashing related structure/fields, not specific to a sec mech */
122 struct cifs_secmech {
123 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
124 struct crypto_shash *md5; /* md5 hash function */
125 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
126 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
129 /* per smb session structure/fields */
130 struct ntlmssp_auth {
131 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
132 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
133 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
134 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
142 struct cifs_sid osid;
143 struct cifs_sid gsid;
144 struct cifs_ntace *ntaces;
145 struct cifs_ace *aces;
149 *****************************************************************
150 * Except the CIFS PDUs themselves all the
151 * globally interesting structs should go here
152 *****************************************************************
161 char *iocharset; /* local code page for mapping to and from Unicode */
162 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
163 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
179 bool no_psx_acl:1; /* set if posix acl support should be disabled */
181 bool backupuid_specified; /* mount option backupuid is specified */
182 bool backupgid_specified; /* mount option backupgid is specified */
183 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
184 bool server_ino:1; /* use inode numbers from server ie UniqueId */
186 bool strict_io:1; /* strict cache behavior */
187 bool remap:1; /* set to remap seven reserved chars in filenames */
188 bool posix_paths:1; /* unset to not ask for posix pathnames. */
191 bool nullauth:1; /* attempt to authenticate with null user */
192 bool nocase:1; /* request case insensitive filenames */
193 bool nobrl:1; /* disable sending byte range locks to srv */
194 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
195 bool seal:1; /* request transport encryption on share */
196 bool nodfs:1; /* Do not request DFS, even if available */
197 bool local_lease:1; /* check leases only on local system, not remote */
200 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
201 bool fsc:1; /* enable fscache */
202 bool mfsymlinks:1; /* use Minshall+French Symlinks */
204 bool rwpidforward:1; /* pid forward for read/write operations */
207 bool sockopt_tcp_nodelay:1;
208 unsigned short int port;
209 unsigned long actimeo; /* attribute cache timeout (jiffies) */
211 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
212 struct nls_table *local_nls;
215 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
216 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
217 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
218 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
219 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
220 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
221 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
222 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
223 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
224 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
226 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
227 MS_NODEV | MS_SYNCHRONOUS)
229 struct cifs_mnt_data {
230 struct cifs_sb_info *cifs_sb;
235 struct TCP_Server_Info {
236 struct list_head tcp_ses_list;
237 struct list_head smb_ses_list;
238 int srv_count; /* reference counter */
239 /* 15 character server name + 0x20 16th byte indicating type = srv */
240 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
241 enum statusEnum tcpStatus; /* what we think the status is */
242 char *hostname; /* hostname portion of UNC string */
243 struct socket *ssocket;
244 struct sockaddr_storage dstaddr;
245 struct sockaddr_storage srcaddr; /* locally bind to this IP */
249 wait_queue_head_t response_q;
250 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
251 struct list_head pending_mid_q;
252 bool noblocksnd; /* use blocking sendmsg */
253 bool noautotune; /* do not autotune send buf sizes */
255 atomic_t inFlight; /* number of requests on the wire to server */
256 struct mutex srv_mutex;
257 struct task_struct *tsk;
258 char server_GUID[16];
260 bool session_estab; /* mark when very first sess is established */
261 u16 dialect; /* dialect index that server chose */
262 enum securityEnum secType;
263 bool oplocks:1; /* enable oplocks */
264 unsigned int maxReq; /* Clients should submit no more */
265 /* than maxReq distinct unanswered SMBs to the server when using */
266 /* multiplexed reads or writes */
267 unsigned int maxBuf; /* maxBuf specifies the maximum */
268 /* message size the server can send or receive for non-raw SMBs */
269 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
270 /* when socket is setup (and during reconnect) before NegProt sent */
271 unsigned int max_rw; /* maxRw specifies the maximum */
272 /* message size the server can send or receive for */
273 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
274 unsigned int max_vcs; /* maximum number of smb sessions, at least
275 those that can be specified uniquely with
277 int capabilities; /* allow selective disabling of caps by smb sess */
278 int timeAdj; /* Adjust for difference in server time zone in sec */
279 __u16 CurrentMid; /* multiplex id - rotating counter */
280 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
281 /* 16th byte of RFC1001 workstation name is always null */
282 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
283 __u32 sequence_number; /* for signing, protected by srv_mutex */
284 struct session_key session_key;
285 unsigned long lstrp; /* when we got last response from this server */
286 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
287 /* extended security flavors that server supports */
288 bool sec_ntlmssp; /* supports NTLMSSP */
289 bool sec_kerberosu2u; /* supports U2U Kerberos */
290 bool sec_kerberos; /* supports plain Kerberos */
291 bool sec_mskerberos; /* supports legacy MS Kerberos */
292 bool large_buf; /* is current buffer large? */
293 struct delayed_work echo; /* echo ping workqueue job */
294 struct kvec *iov; /* reusable kvec array for receives */
295 unsigned int nr_iov; /* number of kvecs in array */
296 char *smallbuf; /* pointer to current "small" buffer */
297 char *bigbuf; /* pointer to current "big" buffer */
298 unsigned int total_read; /* total amount of data read in this pass */
299 #ifdef CONFIG_CIFS_FSCACHE
300 struct fscache_cookie *fscache; /* client index cache cookie */
302 #ifdef CONFIG_CIFS_STATS2
303 atomic_t in_send; /* requests trying to send */
304 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
309 * Macros to allow the TCP_Server_Info->net field and related code to drop out
310 * when CONFIG_NET_NS isn't set.
315 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
320 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
327 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
332 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
339 * Session structure. One of these for each uid session with a particular host
342 struct list_head smb_ses_list;
343 struct list_head tcon_list;
344 struct mutex session_mutex;
345 struct TCP_Server_Info *server; /* pointer to server info */
346 int ses_count; /* reference counter */
347 enum statusEnum status;
348 unsigned overrideSecFlg; /* if non-zero override global sec flags */
349 __u16 ipc_tid; /* special tid for connection to IPC share */
352 char *serverOS; /* name of operating system underlying server */
353 char *serverNOS; /* name of network operating system of server */
354 char *serverDomain; /* security realm of server */
355 int Suid; /* remote smb uid */
356 uid_t linux_uid; /* overriding owner of files on the mount */
357 uid_t cred_uid; /* owner of credentials */
359 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
360 TCP names - will ipv6 and sctp addresses fit? */
361 char *user_name; /* must not be null except during init of sess
362 and after mount option parsing we fill it */
365 struct session_key auth_key;
366 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
367 bool need_reconnect:1; /* connection reset, uid now invalid */
369 /* no more than one of the following three session flags may be set */
370 #define CIFS_SES_NT4 1
371 #define CIFS_SES_OS2 2
372 #define CIFS_SES_W9X 4
373 /* following flag is set for old servers such as OS2 (and Win95?)
374 which do not negotiate NTLM or POSIX dialects, but instead
375 negotiate one of the older LANMAN dialects */
376 #define CIFS_SES_LANMAN 8
378 * there is one of these for each connection to a resource on a particular
382 struct list_head tcon_list;
384 struct list_head openFileList;
385 struct cifs_ses *ses; /* pointer to session associated with */
386 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
387 char *nativeFileSystem;
388 char *password; /* for share-level security */
389 __u16 tid; /* The 2 byte tree id */
390 __u16 Flags; /* optional support bits */
391 enum statusEnum tidStatus;
392 #ifdef CONFIG_CIFS_STATS
393 atomic_t num_smbs_sent;
396 atomic_t num_flushes;
397 atomic_t num_oplock_brks;
400 atomic_t num_deletes;
402 atomic_t num_posixopens;
403 atomic_t num_posixmkdirs;
405 atomic_t num_renames;
406 atomic_t num_t2renames;
410 atomic_t num_hardlinks;
411 atomic_t num_symlinks;
413 atomic_t num_acl_get;
414 atomic_t num_acl_set;
415 #ifdef CONFIG_CIFS_STATS2
416 unsigned long long time_writes;
417 unsigned long long time_reads;
418 unsigned long long time_opens;
419 unsigned long long time_deletes;
420 unsigned long long time_closes;
421 unsigned long long time_mkdirs;
422 unsigned long long time_rmdirs;
423 unsigned long long time_renames;
424 unsigned long long time_t2renames;
425 unsigned long long time_ffirst;
426 unsigned long long time_fnext;
427 unsigned long long time_fclose;
428 #endif /* CONFIG_CIFS_STATS2 */
431 spinlock_t stat_lock;
432 #endif /* CONFIG_CIFS_STATS */
433 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
434 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
435 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
436 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
439 bool seal:1; /* transport encryption for this mounted share */
440 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
441 for this mount even if server would support */
442 bool local_lease:1; /* check leases (only) on local system not remote */
443 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
444 bool need_reconnect:1; /* connection reset, tid now invalid */
445 #ifdef CONFIG_CIFS_FSCACHE
446 u64 resource_id; /* server resource id */
447 struct fscache_cookie *fscache; /* cookie for share */
449 /* BB add field for back pointer to sb struct(s)? */
453 * This is a refcounted and timestamped container for a tcon pointer. The
454 * container holds a tcon reference. It is considered safe to free one of
455 * these when the tl_count goes to 0. The tl_time is the time of the last
456 * "get" on the container.
459 struct rb_node tl_rbnode;
461 unsigned long tl_flags;
462 #define TCON_LINK_MASTER 0
463 #define TCON_LINK_PENDING 1
464 #define TCON_LINK_IN_TREE 2
465 unsigned long tl_time;
467 struct cifs_tcon *tl_tcon;
470 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
472 static inline struct cifs_tcon *
473 tlink_tcon(struct tcon_link *tlink)
475 return tlink->tl_tcon;
478 extern void cifs_put_tlink(struct tcon_link *tlink);
480 static inline struct tcon_link *
481 cifs_get_tlink(struct tcon_link *tlink)
483 if (tlink && !IS_ERR(tlink))
484 atomic_inc(&tlink->tl_count);
488 /* This function is always expected to succeed */
489 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
492 * This info hangs off the cifsFileInfo structure, pointed to by llist.
493 * This is used to track byte stream locks on the file
495 struct cifsLockInfo {
496 struct list_head llist; /* pointer to next cifsLockInfo */
497 struct list_head blist; /* pointer to locks blocked on this */
498 wait_queue_head_t block_q;
507 * One of these for each open instance of a file
509 struct cifs_search_info {
510 loff_t index_of_last_entry;
511 __u16 entries_in_buffer;
514 char *ntwrk_buf_start;
515 char *srch_entries_start;
517 const char *presume_name;
518 unsigned int resume_name_len;
522 bool smallBuf:1; /* so we know which buf_release function to call */
525 struct cifsFileInfo {
526 struct list_head tlist; /* pointer to next fid owned by tcon */
527 struct list_head flist; /* next fid (file instance) for this inode */
528 unsigned int uid; /* allows finding which FileInfo structure */
529 __u32 pid; /* process id who opened file */
530 __u16 netfid; /* file id from remote */
531 /* BB add lock scope info here if needed */ ;
532 /* lock scope id (0 if none) */
533 struct dentry *dentry;
534 unsigned int f_flags;
535 struct tcon_link *tlink;
536 bool invalidHandle:1; /* file closed via session abend */
537 bool oplock_break_cancelled:1;
538 int count; /* refcount protected by cifs_file_list_lock */
539 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
540 struct cifs_search_info srch_inf;
541 struct work_struct oplock_break; /* work for oplock breaks */
544 struct cifs_io_parms {
549 struct cifs_tcon *tcon;
553 * Take a reference on the file private data. Must be called with
554 * cifs_file_list_lock held.
556 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
561 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
564 * One of these for each file inode
567 struct cifsInodeInfo {
568 struct list_head llist; /* brlocks for this inode */
569 bool can_cache_brlcks;
570 struct mutex lock_mutex; /* protect two fields above */
571 /* BB add in lists for dirty pages i.e. write caching info for oplock */
572 struct list_head openFileList;
573 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
574 bool clientCanCacheRead; /* read oplock */
575 bool clientCanCacheAll; /* read and writebehind oplock */
576 bool delete_pending; /* DELETE_ON_CLOSE is set */
577 bool invalid_mapping; /* pagecache is invalid */
578 unsigned long time; /* jiffies of last update of inode */
579 u64 server_eof; /* current file size on server */
580 u64 uniqueid; /* server inode number */
581 u64 createtime; /* creation time on server */
582 #ifdef CONFIG_CIFS_FSCACHE
583 struct fscache_cookie *fscache;
585 struct inode vfs_inode;
588 static inline struct cifsInodeInfo *
589 CIFS_I(struct inode *inode)
591 return container_of(inode, struct cifsInodeInfo, vfs_inode);
594 static inline struct cifs_sb_info *
595 CIFS_SB(struct super_block *sb)
597 return sb->s_fs_info;
600 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
602 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
609 convert_delimiter(char *path, char delim)
622 for (i = 0; path[i] != '\0'; i++) {
623 if (path[i] == old_delim)
628 #ifdef CONFIG_CIFS_STATS
629 #define cifs_stats_inc atomic_inc
631 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
635 spin_lock(&tcon->stat_lock);
636 tcon->bytes_written += bytes;
637 spin_unlock(&tcon->stat_lock);
641 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
644 spin_lock(&tcon->stat_lock);
645 tcon->bytes_read += bytes;
646 spin_unlock(&tcon->stat_lock);
650 #define cifs_stats_inc(field) do {} while (0)
651 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
652 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
659 * This is the prototype for the mid receive function. This function is for
660 * receiving the rest of the SMB frame, starting with the WordCount (which is
661 * just after the MID in struct smb_hdr). Note:
663 * - This will be called by cifsd, with no locks held.
664 * - The mid will still be on the pending_mid_q.
665 * - mid->resp_buf will point to the current buffer.
667 * Returns zero on a successful receive, or an error. The receive state in
668 * the TCP_Server_Info will also be updated.
670 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
671 struct mid_q_entry *mid);
674 * This is the prototype for the mid callback function. This is called once the
675 * mid has been received off of the socket. When creating one, take special
676 * care to avoid deadlocks. Things to bear in mind:
678 * - it will be called by cifsd, with no locks held
679 * - the mid will be removed from any lists
681 typedef void (mid_callback_t)(struct mid_q_entry *mid);
683 /* one of these for every pending CIFS request to the server */
685 struct list_head qhead; /* mids waiting on reply from this server */
686 __u16 mid; /* multiplex id */
687 __u16 pid; /* process id */
688 __u32 sequence_number; /* for CIFS signing */
689 unsigned long when_alloc; /* when mid was created */
690 #ifdef CONFIG_CIFS_STATS2
691 unsigned long when_sent; /* time when smb send finished */
692 unsigned long when_received; /* when demux complete (taken off wire) */
694 mid_receive_t *receive; /* call receive callback */
695 mid_callback_t *callback; /* call completion callback */
696 void *callback_data; /* general purpose pointer for callback */
697 struct smb_hdr *resp_buf; /* pointer to received SMB header */
698 int midState; /* wish this were enum but can not pass to wait_event */
699 __u8 command; /* smb command code */
700 bool largeBuf:1; /* if valid response, is pointer to large buf */
701 bool multiRsp:1; /* multiple trans2 responses for one request */
702 bool multiEnd:1; /* both received */
705 /* Make code in transport.c a little cleaner by moving
706 update of optional stats into function below */
707 #ifdef CONFIG_CIFS_STATS2
709 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
711 atomic_inc(&server->in_send);
714 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
716 atomic_dec(&server->in_send);
719 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
721 atomic_inc(&server->num_waiters);
724 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
726 atomic_dec(&server->num_waiters);
729 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
731 mid->when_sent = jiffies;
734 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
737 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
741 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
745 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
749 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
754 /* for pending dnotify requests */
755 struct dir_notify_req {
756 struct list_head lhead;
763 __u32 filter; /* CompletionFilter (for multishot) */
768 struct dfs_info3_param {
769 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
778 * common struct for holding inode info when searching for or updating an
779 * inode with new info
782 #define CIFS_FATTR_DFS_REFERRAL 0x1
783 #define CIFS_FATTR_DELETE_PENDING 0x2
784 #define CIFS_FATTR_NEED_REVAL 0x4
785 #define CIFS_FATTR_INO_COLLISION 0x8
798 unsigned int cf_nlink;
799 unsigned int cf_dtype;
800 struct timespec cf_atime;
801 struct timespec cf_mtime;
802 struct timespec cf_ctime;
805 static inline void free_dfs_info_param(struct dfs_info3_param *param)
808 kfree(param->path_name);
809 kfree(param->node_name);
814 static inline void free_dfs_info_array(struct dfs_info3_param *param,
818 if ((number_of_items == 0) || (param == NULL))
820 for (i = 0; i < number_of_items; i++) {
821 kfree(param[i].path_name);
822 kfree(param[i].node_name);
828 #define MID_REQUEST_ALLOCATED 1
829 #define MID_REQUEST_SUBMITTED 2
830 #define MID_RESPONSE_RECEIVED 4
831 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
832 #define MID_RESPONSE_MALFORMED 0x10
833 #define MID_SHUTDOWN 0x20
835 /* Types of response buffer returned from SendReceive2 */
836 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
837 #define CIFS_SMALL_BUFFER 1
838 #define CIFS_LARGE_BUFFER 2
839 #define CIFS_IOVEC 4 /* array of response buffers */
841 /* Type of Request to SendReceive2 */
842 #define CIFS_BLOCKING_OP 1 /* operation can block */
843 #define CIFS_ASYNC_OP 2 /* do not wait for response */
844 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
845 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
846 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
847 #define CIFS_NO_RESP 0x040 /* no response buffer required */
849 /* Security Flags: indicate type of session setup needed */
850 #define CIFSSEC_MAY_SIGN 0x00001
851 #define CIFSSEC_MAY_NTLM 0x00002
852 #define CIFSSEC_MAY_NTLMV2 0x00004
853 #define CIFSSEC_MAY_KRB5 0x00008
854 #ifdef CONFIG_CIFS_WEAK_PW_HASH
855 #define CIFSSEC_MAY_LANMAN 0x00010
856 #define CIFSSEC_MAY_PLNTXT 0x00020
858 #define CIFSSEC_MAY_LANMAN 0
859 #define CIFSSEC_MAY_PLNTXT 0
860 #endif /* weak passwords */
861 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
862 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
864 #define CIFSSEC_MUST_SIGN 0x01001
865 /* note that only one of the following can be set so the
866 result of setting MUST flags more than once will be to
867 require use of the stronger protocol */
868 #define CIFSSEC_MUST_NTLM 0x02002
869 #define CIFSSEC_MUST_NTLMV2 0x04004
870 #define CIFSSEC_MUST_KRB5 0x08008
871 #ifdef CONFIG_CIFS_WEAK_PW_HASH
872 #define CIFSSEC_MUST_LANMAN 0x10010
873 #define CIFSSEC_MUST_PLNTXT 0x20020
874 #ifdef CONFIG_CIFS_UPCALL
875 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
877 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
879 #else /* do not allow weak pw hash */
880 #ifdef CONFIG_CIFS_UPCALL
881 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
883 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
885 #endif /* WEAK_PW_HASH */
886 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
887 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
889 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
890 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
891 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
893 *****************************************************************
894 * All constants go here
895 *****************************************************************
898 #define UID_HASH (16)
901 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
902 * following to be declared.
905 /****************************************************************************
906 * Locking notes. All updates to global variables and lists should be
907 * protected by spinlocks or semaphores.
911 * GlobalMid_Lock protects:
912 * list operations on pending_mid_q and oplockQ
913 * updates to XID counters, multiplex id and SMB sequence numbers
914 * cifs_file_list_lock protects:
915 * list operations on tcp and SMB session lists and tCon lists
916 * f_owner.lock protects certain per file struct operations
917 * mapping->page_lock protects certain per page operations
921 * sesSem operations on smb session
922 * tconSem operations on tree connection
923 * fh_sem file handle reconnection operations
925 ****************************************************************************/
927 #ifdef DECLARE_GLOBALS_HERE
928 #define GLOBAL_EXTERN
930 #define GLOBAL_EXTERN extern
934 * the list of TCP_Server_Info structures, ie each of the sockets
935 * connecting our client to a distinct server (ip address), is
936 * chained together by cifs_tcp_ses_list. The list of all our SMB
937 * sessions (and from that the tree connections) can be found
938 * by iterating over cifs_tcp_ses_list
940 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
943 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
944 * tcp session, and the list of tcon's per smb session. It also protects
945 * the reference counters for the server, smb session, and tcon. Finally,
946 * changes to the tcon->tidStatus should be done while holding this lock.
948 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
951 * This lock protects the cifs_file->llist and cifs_file->flist
952 * list operations, and updates to some flags (cifs_file->invalidHandle)
953 * It will be moved to either use the tcon->stat_lock or equivalent later.
954 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
955 * the cifs_tcp_ses_lock must be grabbed first and released last.
957 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
959 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
960 /* Outstanding dir notify requests */
961 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
962 /* DirNotify response queue */
963 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
964 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
967 * Global transaction id (XID) information
969 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
970 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
971 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
972 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
973 /* on midQ entries */
975 * Global counters, updated atomically
977 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
978 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
979 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
980 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
981 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
983 /* Various Debug counters */
984 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
985 #ifdef CONFIG_CIFS_STATS2
986 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
987 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
989 GLOBAL_EXTERN atomic_t smBufAllocCount;
990 GLOBAL_EXTERN atomic_t midCount;
993 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
994 to be established on existing mount if we
995 have the uid/password or Kerberos credential
996 or equivalent for current user */
997 /* enable or disable oplocks */
998 GLOBAL_EXTERN bool enable_oplocks;
999 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1000 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1001 with more secure ntlmssp2 challenge/resp */
1002 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1003 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1004 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1005 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1006 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1007 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1009 /* reconnect after this many failed echo attempts */
1010 GLOBAL_EXTERN unsigned short echo_retries;
1012 #ifdef CONFIG_CIFS_ACL
1013 GLOBAL_EXTERN struct rb_root uidtree;
1014 GLOBAL_EXTERN struct rb_root gidtree;
1015 GLOBAL_EXTERN spinlock_t siduidlock;
1016 GLOBAL_EXTERN spinlock_t sidgidlock;
1017 GLOBAL_EXTERN struct rb_root siduidtree;
1018 GLOBAL_EXTERN struct rb_root sidgidtree;
1019 GLOBAL_EXTERN spinlock_t uidsidlock;
1020 GLOBAL_EXTERN spinlock_t gidsidlock;
1021 #endif /* CONFIG_CIFS_ACL */
1023 void cifs_oplock_break(struct work_struct *work);
1025 extern const struct slow_work_ops cifs_oplock_break_ops;
1027 #endif /* _CIFS_GLOB_H */