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.
60 #define CIFS_MAX_REQ 32767
62 #define RFC1001_NAME_LEN 15
63 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
65 /* currently length of NIP6_FMT */
66 #define SERVER_NAME_LENGTH 40
67 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
69 /* used to define string lengths for reversing unicode strings */
71 /* (max path length + 1 for null) * 2 for unicode */
76 #ifndef XATTR_DOS_ATTRIB
77 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
81 * CIFS vfs client Status information (based on what we know.)
84 /* associated with each tcp and smb session */
94 LANMAN = 0, /* Legacy LANMAN auth */
95 NTLM, /* Legacy NTLM012 auth with NTLM hash */
96 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
97 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
98 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
99 Kerberos, /* Kerberos via SPNEGO */
105 /* Netbios frames protocol not supported at this time */
113 /* crypto security descriptor definition */
115 struct shash_desc shash;
119 /* crypto hashing related structure/fields, not specific to a sec mech */
120 struct cifs_secmech {
121 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
122 struct crypto_shash *md5; /* md5 hash function */
123 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
124 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
127 /* per smb session structure/fields */
128 struct ntlmssp_auth {
129 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
130 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
131 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
132 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
140 struct cifs_sid osid;
141 struct cifs_sid gsid;
142 struct cifs_ntace *ntaces;
143 struct cifs_ace *aces;
147 *****************************************************************
148 * Except the CIFS PDUs themselves all the
149 * globally interesting structs should go here
150 *****************************************************************
159 char *iocharset; /* local code page for mapping to and from Unicode */
160 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
161 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
177 bool no_psx_acl:1; /* set if posix acl support should be disabled */
179 bool backupuid_specified; /* mount option backupuid is specified */
180 bool backupgid_specified; /* mount option backupgid is specified */
181 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
182 bool server_ino:1; /* use inode numbers from server ie UniqueId */
184 bool strict_io:1; /* strict cache behavior */
185 bool remap:1; /* set to remap seven reserved chars in filenames */
186 bool posix_paths:1; /* unset to not ask for posix pathnames. */
189 bool nullauth:1; /* attempt to authenticate with null user */
190 bool nocase:1; /* request case insensitive filenames */
191 bool nobrl:1; /* disable sending byte range locks to srv */
192 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
193 bool seal:1; /* request transport encryption on share */
194 bool nodfs:1; /* Do not request DFS, even if available */
195 bool local_lease:1; /* check leases only on local system, not remote */
198 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
199 bool fsc:1; /* enable fscache */
200 bool mfsymlinks:1; /* use Minshall+French Symlinks */
202 bool rwpidforward:1; /* pid forward for read/write operations */
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 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
214 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
215 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
216 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
217 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
218 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
219 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
220 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
221 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
222 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
224 #define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
225 MS_NODEV | MS_SYNCHRONOUS)
227 struct cifs_mnt_data {
228 struct cifs_sb_info *cifs_sb;
233 struct TCP_Server_Info {
234 struct list_head tcp_ses_list;
235 struct list_head smb_ses_list;
236 int srv_count; /* reference counter */
237 /* 15 character server name + 0x20 16th byte indicating type = srv */
238 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
239 enum statusEnum tcpStatus; /* what we think the status is */
240 char *hostname; /* hostname portion of UNC string */
241 struct socket *ssocket;
242 struct sockaddr_storage dstaddr;
243 struct sockaddr_storage srcaddr; /* locally bind to this IP */
247 wait_queue_head_t response_q;
248 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
249 struct list_head pending_mid_q;
250 bool noblocksnd; /* use blocking sendmsg */
251 bool noautotune; /* do not autotune send buf sizes */
253 unsigned int in_flight; /* number of requests on the wire to server */
254 spinlock_t req_lock; /* protect the value above */
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 */
307 static inline unsigned int
308 in_flight(struct TCP_Server_Info *server)
311 spin_lock(&server->req_lock);
312 num = server->in_flight;
313 spin_unlock(&server->req_lock);
318 dec_in_flight(struct TCP_Server_Info *server)
320 spin_lock(&server->req_lock);
322 spin_unlock(&server->req_lock);
326 * Macros to allow the TCP_Server_Info->net field and related code to drop out
327 * when CONFIG_NET_NS isn't set.
332 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
337 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
344 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
349 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
356 * Session structure. One of these for each uid session with a particular host
359 struct list_head smb_ses_list;
360 struct list_head tcon_list;
361 struct mutex session_mutex;
362 struct TCP_Server_Info *server; /* pointer to server info */
363 int ses_count; /* reference counter */
364 enum statusEnum status;
365 unsigned overrideSecFlg; /* if non-zero override global sec flags */
366 __u16 ipc_tid; /* special tid for connection to IPC share */
369 char *serverOS; /* name of operating system underlying server */
370 char *serverNOS; /* name of network operating system of server */
371 char *serverDomain; /* security realm of server */
372 int Suid; /* remote smb uid */
373 uid_t linux_uid; /* overriding owner of files on the mount */
374 uid_t cred_uid; /* owner of credentials */
376 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
377 TCP names - will ipv6 and sctp addresses fit? */
378 char *user_name; /* must not be null except during init of sess
379 and after mount option parsing we fill it */
382 struct session_key auth_key;
383 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
384 bool need_reconnect:1; /* connection reset, uid now invalid */
386 /* no more than one of the following three session flags may be set */
387 #define CIFS_SES_NT4 1
388 #define CIFS_SES_OS2 2
389 #define CIFS_SES_W9X 4
390 /* following flag is set for old servers such as OS2 (and Win95?)
391 which do not negotiate NTLM or POSIX dialects, but instead
392 negotiate one of the older LANMAN dialects */
393 #define CIFS_SES_LANMAN 8
395 * there is one of these for each connection to a resource on a particular
399 struct list_head tcon_list;
401 struct list_head openFileList;
402 struct cifs_ses *ses; /* pointer to session associated with */
403 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
404 char *nativeFileSystem;
405 char *password; /* for share-level security */
406 __u16 tid; /* The 2 byte tree id */
407 __u16 Flags; /* optional support bits */
408 enum statusEnum tidStatus;
409 #ifdef CONFIG_CIFS_STATS
410 atomic_t num_smbs_sent;
413 atomic_t num_flushes;
414 atomic_t num_oplock_brks;
417 atomic_t num_deletes;
419 atomic_t num_posixopens;
420 atomic_t num_posixmkdirs;
422 atomic_t num_renames;
423 atomic_t num_t2renames;
427 atomic_t num_hardlinks;
428 atomic_t num_symlinks;
430 atomic_t num_acl_get;
431 atomic_t num_acl_set;
432 #ifdef CONFIG_CIFS_STATS2
433 unsigned long long time_writes;
434 unsigned long long time_reads;
435 unsigned long long time_opens;
436 unsigned long long time_deletes;
437 unsigned long long time_closes;
438 unsigned long long time_mkdirs;
439 unsigned long long time_rmdirs;
440 unsigned long long time_renames;
441 unsigned long long time_t2renames;
442 unsigned long long time_ffirst;
443 unsigned long long time_fnext;
444 unsigned long long time_fclose;
445 #endif /* CONFIG_CIFS_STATS2 */
448 spinlock_t stat_lock;
449 #endif /* CONFIG_CIFS_STATS */
450 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
451 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
452 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
453 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
456 bool seal:1; /* transport encryption for this mounted share */
457 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
458 for this mount even if server would support */
459 bool local_lease:1; /* check leases (only) on local system not remote */
460 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
461 bool need_reconnect:1; /* connection reset, tid now invalid */
462 #ifdef CONFIG_CIFS_FSCACHE
463 u64 resource_id; /* server resource id */
464 struct fscache_cookie *fscache; /* cookie for share */
466 /* BB add field for back pointer to sb struct(s)? */
470 * This is a refcounted and timestamped container for a tcon pointer. The
471 * container holds a tcon reference. It is considered safe to free one of
472 * these when the tl_count goes to 0. The tl_time is the time of the last
473 * "get" on the container.
476 struct rb_node tl_rbnode;
478 unsigned long tl_flags;
479 #define TCON_LINK_MASTER 0
480 #define TCON_LINK_PENDING 1
481 #define TCON_LINK_IN_TREE 2
482 unsigned long tl_time;
484 struct cifs_tcon *tl_tcon;
487 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
489 static inline struct cifs_tcon *
490 tlink_tcon(struct tcon_link *tlink)
492 return tlink->tl_tcon;
495 extern void cifs_put_tlink(struct tcon_link *tlink);
497 static inline struct tcon_link *
498 cifs_get_tlink(struct tcon_link *tlink)
500 if (tlink && !IS_ERR(tlink))
501 atomic_inc(&tlink->tl_count);
505 /* This function is always expected to succeed */
506 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
509 * This info hangs off the cifsFileInfo structure, pointed to by llist.
510 * This is used to track byte stream locks on the file
512 struct cifsLockInfo {
513 struct list_head llist; /* pointer to next cifsLockInfo */
514 struct list_head blist; /* pointer to locks blocked on this */
515 wait_queue_head_t block_q;
524 * One of these for each open instance of a file
526 struct cifs_search_info {
527 loff_t index_of_last_entry;
528 __u16 entries_in_buffer;
531 char *ntwrk_buf_start;
532 char *srch_entries_start;
534 const char *presume_name;
535 unsigned int resume_name_len;
539 bool smallBuf:1; /* so we know which buf_release function to call */
542 struct cifsFileInfo {
543 struct list_head tlist; /* pointer to next fid owned by tcon */
544 struct list_head flist; /* next fid (file instance) for this inode */
545 unsigned int uid; /* allows finding which FileInfo structure */
546 __u32 pid; /* process id who opened file */
547 __u16 netfid; /* file id from remote */
548 /* BB add lock scope info here if needed */ ;
549 /* lock scope id (0 if none) */
550 struct dentry *dentry;
551 unsigned int f_flags;
552 struct tcon_link *tlink;
553 bool invalidHandle:1; /* file closed via session abend */
554 bool oplock_break_cancelled:1;
555 int count; /* refcount protected by cifs_file_list_lock */
556 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
557 struct cifs_search_info srch_inf;
558 struct work_struct oplock_break; /* work for oplock breaks */
561 struct cifs_io_parms {
566 struct cifs_tcon *tcon;
570 * Take a reference on the file private data. Must be called with
571 * cifs_file_list_lock held.
573 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
578 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
581 * One of these for each file inode
584 struct cifsInodeInfo {
585 struct list_head llist; /* brlocks for this inode */
586 bool can_cache_brlcks;
587 struct mutex lock_mutex; /* protect two fields above */
588 /* BB add in lists for dirty pages i.e. write caching info for oplock */
589 struct list_head openFileList;
590 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
591 bool clientCanCacheRead; /* read oplock */
592 bool clientCanCacheAll; /* read and writebehind oplock */
593 bool delete_pending; /* DELETE_ON_CLOSE is set */
594 bool invalid_mapping; /* pagecache is invalid */
595 unsigned long time; /* jiffies of last update of inode */
596 u64 server_eof; /* current file size on server */
597 u64 uniqueid; /* server inode number */
598 u64 createtime; /* creation time on server */
599 #ifdef CONFIG_CIFS_FSCACHE
600 struct fscache_cookie *fscache;
602 struct inode vfs_inode;
605 static inline struct cifsInodeInfo *
606 CIFS_I(struct inode *inode)
608 return container_of(inode, struct cifsInodeInfo, vfs_inode);
611 static inline struct cifs_sb_info *
612 CIFS_SB(struct super_block *sb)
614 return sb->s_fs_info;
617 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
619 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
626 convert_delimiter(char *path, char delim)
639 for (i = 0; path[i] != '\0'; i++) {
640 if (path[i] == old_delim)
645 #ifdef CONFIG_CIFS_STATS
646 #define cifs_stats_inc atomic_inc
648 static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
652 spin_lock(&tcon->stat_lock);
653 tcon->bytes_written += bytes;
654 spin_unlock(&tcon->stat_lock);
658 static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
661 spin_lock(&tcon->stat_lock);
662 tcon->bytes_read += bytes;
663 spin_unlock(&tcon->stat_lock);
667 #define cifs_stats_inc(field) do {} while (0)
668 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
669 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
676 * This is the prototype for the mid receive function. This function is for
677 * receiving the rest of the SMB frame, starting with the WordCount (which is
678 * just after the MID in struct smb_hdr). Note:
680 * - This will be called by cifsd, with no locks held.
681 * - The mid will still be on the pending_mid_q.
682 * - mid->resp_buf will point to the current buffer.
684 * Returns zero on a successful receive, or an error. The receive state in
685 * the TCP_Server_Info will also be updated.
687 typedef int (mid_receive_t)(struct TCP_Server_Info *server,
688 struct mid_q_entry *mid);
691 * This is the prototype for the mid callback function. This is called once the
692 * mid has been received off of the socket. When creating one, take special
693 * care to avoid deadlocks. Things to bear in mind:
695 * - it will be called by cifsd, with no locks held
696 * - the mid will be removed from any lists
698 typedef void (mid_callback_t)(struct mid_q_entry *mid);
700 /* one of these for every pending CIFS request to the server */
702 struct list_head qhead; /* mids waiting on reply from this server */
703 __u16 mid; /* multiplex id */
704 __u16 pid; /* process id */
705 __u32 sequence_number; /* for CIFS signing */
706 unsigned long when_alloc; /* when mid was created */
707 #ifdef CONFIG_CIFS_STATS2
708 unsigned long when_sent; /* time when smb send finished */
709 unsigned long when_received; /* when demux complete (taken off wire) */
711 mid_receive_t *receive; /* call receive callback */
712 mid_callback_t *callback; /* call completion callback */
713 void *callback_data; /* general purpose pointer for callback */
714 struct smb_hdr *resp_buf; /* pointer to received SMB header */
715 int midState; /* wish this were enum but can not pass to wait_event */
716 __u8 command; /* smb command code */
717 bool largeBuf:1; /* if valid response, is pointer to large buf */
718 bool multiRsp:1; /* multiple trans2 responses for one request */
719 bool multiEnd:1; /* both received */
722 /* Make code in transport.c a little cleaner by moving
723 update of optional stats into function below */
724 #ifdef CONFIG_CIFS_STATS2
726 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
728 atomic_inc(&server->in_send);
731 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
733 atomic_dec(&server->in_send);
736 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
738 atomic_inc(&server->num_waiters);
741 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
743 atomic_dec(&server->num_waiters);
746 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
748 mid->when_sent = jiffies;
751 static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
754 static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
758 static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
762 static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
766 static inline void cifs_save_when_sent(struct mid_q_entry *mid)
771 /* for pending dnotify requests */
772 struct dir_notify_req {
773 struct list_head lhead;
780 __u32 filter; /* CompletionFilter (for multishot) */
785 struct dfs_info3_param {
786 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
795 * common struct for holding inode info when searching for or updating an
796 * inode with new info
799 #define CIFS_FATTR_DFS_REFERRAL 0x1
800 #define CIFS_FATTR_DELETE_PENDING 0x2
801 #define CIFS_FATTR_NEED_REVAL 0x4
802 #define CIFS_FATTR_INO_COLLISION 0x8
815 unsigned int cf_nlink;
816 unsigned int cf_dtype;
817 struct timespec cf_atime;
818 struct timespec cf_mtime;
819 struct timespec cf_ctime;
822 static inline void free_dfs_info_param(struct dfs_info3_param *param)
825 kfree(param->path_name);
826 kfree(param->node_name);
831 static inline void free_dfs_info_array(struct dfs_info3_param *param,
835 if ((number_of_items == 0) || (param == NULL))
837 for (i = 0; i < number_of_items; i++) {
838 kfree(param[i].path_name);
839 kfree(param[i].node_name);
845 #define MID_REQUEST_ALLOCATED 1
846 #define MID_REQUEST_SUBMITTED 2
847 #define MID_RESPONSE_RECEIVED 4
848 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
849 #define MID_RESPONSE_MALFORMED 0x10
850 #define MID_SHUTDOWN 0x20
852 /* Types of response buffer returned from SendReceive2 */
853 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
854 #define CIFS_SMALL_BUFFER 1
855 #define CIFS_LARGE_BUFFER 2
856 #define CIFS_IOVEC 4 /* array of response buffers */
858 /* Type of Request to SendReceive2 */
859 #define CIFS_BLOCKING_OP 1 /* operation can block */
860 #define CIFS_ASYNC_OP 2 /* do not wait for response */
861 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
862 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
863 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
864 #define CIFS_NO_RESP 0x040 /* no response buffer required */
866 /* Security Flags: indicate type of session setup needed */
867 #define CIFSSEC_MAY_SIGN 0x00001
868 #define CIFSSEC_MAY_NTLM 0x00002
869 #define CIFSSEC_MAY_NTLMV2 0x00004
870 #define CIFSSEC_MAY_KRB5 0x00008
871 #ifdef CONFIG_CIFS_WEAK_PW_HASH
872 #define CIFSSEC_MAY_LANMAN 0x00010
873 #define CIFSSEC_MAY_PLNTXT 0x00020
875 #define CIFSSEC_MAY_LANMAN 0
876 #define CIFSSEC_MAY_PLNTXT 0
877 #endif /* weak passwords */
878 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
879 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
881 #define CIFSSEC_MUST_SIGN 0x01001
882 /* note that only one of the following can be set so the
883 result of setting MUST flags more than once will be to
884 require use of the stronger protocol */
885 #define CIFSSEC_MUST_NTLM 0x02002
886 #define CIFSSEC_MUST_NTLMV2 0x04004
887 #define CIFSSEC_MUST_KRB5 0x08008
888 #ifdef CONFIG_CIFS_WEAK_PW_HASH
889 #define CIFSSEC_MUST_LANMAN 0x10010
890 #define CIFSSEC_MUST_PLNTXT 0x20020
891 #ifdef CONFIG_CIFS_UPCALL
892 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
894 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
896 #else /* do not allow weak pw hash */
897 #define CIFSSEC_MUST_LANMAN 0
898 #define CIFSSEC_MUST_PLNTXT 0
899 #ifdef CONFIG_CIFS_UPCALL
900 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
902 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
904 #endif /* WEAK_PW_HASH */
905 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
906 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
908 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
909 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
910 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
912 *****************************************************************
913 * All constants go here
914 *****************************************************************
917 #define UID_HASH (16)
920 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
921 * following to be declared.
924 /****************************************************************************
925 * Locking notes. All updates to global variables and lists should be
926 * protected by spinlocks or semaphores.
930 * GlobalMid_Lock protects:
931 * list operations on pending_mid_q and oplockQ
932 * updates to XID counters, multiplex id and SMB sequence numbers
933 * cifs_file_list_lock protects:
934 * list operations on tcp and SMB session lists and tCon lists
935 * f_owner.lock protects certain per file struct operations
936 * mapping->page_lock protects certain per page operations
940 * sesSem operations on smb session
941 * tconSem operations on tree connection
942 * fh_sem file handle reconnection operations
944 ****************************************************************************/
946 #ifdef DECLARE_GLOBALS_HERE
947 #define GLOBAL_EXTERN
949 #define GLOBAL_EXTERN extern
953 * the list of TCP_Server_Info structures, ie each of the sockets
954 * connecting our client to a distinct server (ip address), is
955 * chained together by cifs_tcp_ses_list. The list of all our SMB
956 * sessions (and from that the tree connections) can be found
957 * by iterating over cifs_tcp_ses_list
959 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
962 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
963 * tcp session, and the list of tcon's per smb session. It also protects
964 * the reference counters for the server, smb session, and tcon. Finally,
965 * changes to the tcon->tidStatus should be done while holding this lock.
967 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
970 * This lock protects the cifs_file->llist and cifs_file->flist
971 * list operations, and updates to some flags (cifs_file->invalidHandle)
972 * It will be moved to either use the tcon->stat_lock or equivalent later.
973 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
974 * the cifs_tcp_ses_lock must be grabbed first and released last.
976 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
978 #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
979 /* Outstanding dir notify requests */
980 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
981 /* DirNotify response queue */
982 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
983 #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
986 * Global transaction id (XID) information
988 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
989 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
990 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
991 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
992 /* on midQ entries */
994 * Global counters, updated atomically
996 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
997 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
998 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
999 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1000 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1002 /* Various Debug counters */
1003 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1004 #ifdef CONFIG_CIFS_STATS2
1005 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1006 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1008 GLOBAL_EXTERN atomic_t smBufAllocCount;
1009 GLOBAL_EXTERN atomic_t midCount;
1012 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
1013 to be established on existing mount if we
1014 have the uid/password or Kerberos credential
1015 or equivalent for current user */
1016 /* enable or disable oplocks */
1017 GLOBAL_EXTERN bool enable_oplocks;
1018 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
1019 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1020 with more secure ntlmssp2 challenge/resp */
1021 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
1022 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1023 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1024 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1025 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1026 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1028 /* reconnect after this many failed echo attempts */
1029 GLOBAL_EXTERN unsigned short echo_retries;
1031 #ifdef CONFIG_CIFS_ACL
1032 GLOBAL_EXTERN struct rb_root uidtree;
1033 GLOBAL_EXTERN struct rb_root gidtree;
1034 GLOBAL_EXTERN spinlock_t siduidlock;
1035 GLOBAL_EXTERN spinlock_t sidgidlock;
1036 GLOBAL_EXTERN struct rb_root siduidtree;
1037 GLOBAL_EXTERN struct rb_root sidgidtree;
1038 GLOBAL_EXTERN spinlock_t uidsidlock;
1039 GLOBAL_EXTERN spinlock_t gidsidlock;
1040 #endif /* CONFIG_CIFS_ACL */
1042 void cifs_oplock_break(struct work_struct *work);
1044 extern const struct slow_work_ops cifs_oplock_break_ops;
1046 #endif /* _CIFS_GLOB_H */