1 /*
2 * fs/cifs/cifsglob.h
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2008
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 * Jeremy Allison (jra@samba.org)
7 *
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.
12 *
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.
17 *
18 */
19 #ifndef _CIFS_GLOB_H
20 #define _CIFS_GLOB_H
21
22 #include <linux/in.h>
23 #include <linux/in6.h>
24 #include <linux/slab.h>
25 #include <linux/workqueue.h>
26 #include "cifs_fs_sb.h"
27 #include "cifsacl.h"
28 #include <crypto/internal/hash.h>
29 #include <linux/scatterlist.h>
30
31 /*
32 * The sizes of various internal tables and strings
33 */
34 #define MAX_UID_INFO 16
35 #define MAX_SES_INFO 2
36 #define MAX_TCON_INFO 4
37
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 */
43
44 #define CIFS_MIN_RCV_POOL 4
45
46 /*
47 * default attribute cache timeout (jiffies)
48 */
49 #define CIFS_DEF_ACTIMEO (1 * HZ)
50
51 /*
52 * max attribute cache timeout (jiffies) - 2^30
53 */
54 #define CIFS_MAX_ACTIMEO (1 << 30)
55
56 /*
57 * MAX_REQ is the maximum number of requests that WE will send
58 * on one socket concurrently. It also matches the most common
59 * value of max multiplex returned by servers. We may
60 * eventually want to use the negotiated value (in case
61 * future servers can handle more) when we are more confident that
62 * we will not have problems oveloading the socket with pending
63 * write data.
64 */
65 #define CIFS_MAX_REQ 50
66
67 #define RFC1001_NAME_LEN 15
68 #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
69
70 /* currently length of NIP6_FMT */
71 #define SERVER_NAME_LENGTH 40
72 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
73
74 /* used to define string lengths for reversing unicode strings */
75 /* (256+1)*2 = 514 */
76 /* (max path length + 1 for null) * 2 for unicode */
77 #define MAX_NAME 514
78
79 #include "cifspdu.h"
80
81 #ifndef XATTR_DOS_ATTRIB
82 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
83 #endif
84
85 /*
86 * CIFS vfs client Status information (based on what we know.)
87 */
88
89 /* associated with each tcp and smb session */
90 enum statusEnum {
91 CifsNew = 0,
92 CifsGood,
93 CifsExiting,
94 CifsNeedReconnect,
95 CifsNeedNegotiate
96 };
97
98 enum securityEnum {
99 LANMAN = 0, /* Legacy LANMAN auth */
100 NTLM, /* Legacy NTLM012 auth with NTLM hash */
101 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
102 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
103 /* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
104 Kerberos, /* Kerberos via SPNEGO */
105 };
106
107 enum protocolEnum {
108 TCP = 0,
109 SCTP
110 /* Netbios frames protocol not supported at this time */
111 };
112
113 struct session_key {
114 unsigned int len;
115 char *response;
116 };
117
118 /* crypto security descriptor definition */
119 struct sdesc {
120 struct shash_desc shash;
121 char ctx[];
122 };
123
124 /* crypto hashing related structure/fields, not specific to a sec mech */
125 struct cifs_secmech {
126 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
127 struct crypto_shash *md5; /* md5 hash function */
128 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
129 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
130 };
131
132 /* per smb session structure/fields */
133 struct ntlmssp_auth {
134 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
135 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
136 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
137 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
138 };
139
140 struct cifs_cred {
141 int uid;
142 int gid;
143 int mode;
144 int cecount;
145 struct cifs_sid osid;
146 struct cifs_sid gsid;
147 struct cifs_ntace *ntaces;
148 struct cifs_ace *aces;
149 };
150
151 /*
152 *****************************************************************
153 * Except the CIFS PDUs themselves all the
154 * globally interesting structs should go here
155 *****************************************************************
156 */
157
158 struct TCP_Server_Info {
159 struct list_head tcp_ses_list;
160 struct list_head smb_ses_list;
161 int srv_count; /* reference counter */
162 /* 15 character server name + 0x20 16th byte indicating type = srv */
163 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
164 enum statusEnum tcpStatus; /* what we think the status is */
165 char *hostname; /* hostname portion of UNC string */
166 struct socket *ssocket;
167 struct sockaddr_storage dstaddr;
168 struct sockaddr_storage srcaddr; /* locally bind to this IP */
169 #ifdef CONFIG_NET_NS
170 struct net *net;
171 #endif
172 wait_queue_head_t response_q;
173 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
174 struct list_head pending_mid_q;
175 bool noblocksnd; /* use blocking sendmsg */
176 bool noautotune; /* do not autotune send buf sizes */
177 bool tcp_nodelay;
178 atomic_t inFlight; /* number of requests on the wire to server */
179 struct mutex srv_mutex;
180 struct task_struct *tsk;
181 char server_GUID[16];
182 char secMode;
183 bool session_estab; /* mark when very first sess is established */
184 u16 dialect; /* dialect index that server chose */
185 enum securityEnum secType;
186 unsigned int maxReq; /* Clients should submit no more */
187 /* than maxReq distinct unanswered SMBs to the server when using */
188 /* multiplexed reads or writes */
189 unsigned int maxBuf; /* maxBuf specifies the maximum */
190 /* message size the server can send or receive for non-raw SMBs */
191 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
192 /* when socket is setup (and during reconnect) before NegProt sent */
193 unsigned int max_rw; /* maxRw specifies the maximum */
194 /* message size the server can send or receive for */
195 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
196 unsigned int max_vcs; /* maximum number of smb sessions, at least
197 those that can be specified uniquely with
198 vcnumbers */
199 int capabilities; /* allow selective disabling of caps by smb sess */
200 int timeAdj; /* Adjust for difference in server time zone in sec */
201 __u16 CurrentMid; /* multiplex id - rotating counter */
202 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
203 /* 16th byte of RFC1001 workstation name is always null */
204 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
205 __u32 sequence_number; /* for signing, protected by srv_mutex */
206 struct session_key session_key;
207 unsigned long lstrp; /* when we got last response from this server */
208 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
209 /* extended security flavors that server supports */
210 bool sec_ntlmssp; /* supports NTLMSSP */
211 bool sec_kerberosu2u; /* supports U2U Kerberos */
212 bool sec_kerberos; /* supports plain Kerberos */
213 bool sec_mskerberos; /* supports legacy MS Kerberos */
214 struct delayed_work echo; /* echo ping workqueue job */
215 #ifdef CONFIG_CIFS_FSCACHE
216 struct fscache_cookie *fscache; /* client index cache cookie */
217 #endif
218 #ifdef CONFIG_CIFS_STATS2
219 atomic_t inSend; /* requests trying to send */
220 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
221 #endif
222 };
223
224 /*
225 * Macros to allow the TCP_Server_Info->net field and related code to drop out
226 * when CONFIG_NET_NS isn't set.
227 */
228
229 #ifdef CONFIG_NET_NS
230
cifs_net_ns(struct TCP_Server_Info * srv)231 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
232 {
233 return srv->net;
234 }
235
cifs_set_net_ns(struct TCP_Server_Info * srv,struct net * net)236 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
237 {
238 srv->net = net;
239 }
240
241 #else
242
cifs_net_ns(struct TCP_Server_Info * srv)243 static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
244 {
245 return &init_net;
246 }
247
cifs_set_net_ns(struct TCP_Server_Info * srv,struct net * net)248 static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
249 {
250 }
251
252 #endif
253
254 /*
255 * Session structure. One of these for each uid session with a particular host
256 */
257 struct cifsSesInfo {
258 struct list_head smb_ses_list;
259 struct list_head tcon_list;
260 struct mutex session_mutex;
261 struct TCP_Server_Info *server; /* pointer to server info */
262 int ses_count; /* reference counter */
263 enum statusEnum status;
264 unsigned overrideSecFlg; /* if non-zero override global sec flags */
265 __u16 ipc_tid; /* special tid for connection to IPC share */
266 __u16 flags;
267 __u16 vcnum;
268 char *serverOS; /* name of operating system underlying server */
269 char *serverNOS; /* name of network operating system of server */
270 char *serverDomain; /* security realm of server */
271 int Suid; /* remote smb uid */
272 uid_t linux_uid; /* overriding owner of files on the mount */
273 uid_t cred_uid; /* owner of credentials */
274 int capabilities;
275 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
276 TCP names - will ipv6 and sctp addresses fit? */
277 char *user_name;
278 char *domainName;
279 char *password;
280 struct session_key auth_key;
281 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
282 bool need_reconnect:1; /* connection reset, uid now invalid */
283 };
284 /* no more than one of the following three session flags may be set */
285 #define CIFS_SES_NT4 1
286 #define CIFS_SES_OS2 2
287 #define CIFS_SES_W9X 4
288 /* following flag is set for old servers such as OS2 (and Win95?)
289 which do not negotiate NTLM or POSIX dialects, but instead
290 negotiate one of the older LANMAN dialects */
291 #define CIFS_SES_LANMAN 8
292 /*
293 * there is one of these for each connection to a resource on a particular
294 * session
295 */
296 struct cifsTconInfo {
297 struct list_head tcon_list;
298 int tc_count;
299 struct list_head openFileList;
300 struct cifsSesInfo *ses; /* pointer to session associated with */
301 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
302 char *nativeFileSystem;
303 char *password; /* for share-level security */
304 __u16 tid; /* The 2 byte tree id */
305 __u16 Flags; /* optional support bits */
306 enum statusEnum tidStatus;
307 #ifdef CONFIG_CIFS_STATS
308 atomic_t num_smbs_sent;
309 atomic_t num_writes;
310 atomic_t num_reads;
311 atomic_t num_flushes;
312 atomic_t num_oplock_brks;
313 atomic_t num_opens;
314 atomic_t num_closes;
315 atomic_t num_deletes;
316 atomic_t num_mkdirs;
317 atomic_t num_posixopens;
318 atomic_t num_posixmkdirs;
319 atomic_t num_rmdirs;
320 atomic_t num_renames;
321 atomic_t num_t2renames;
322 atomic_t num_ffirst;
323 atomic_t num_fnext;
324 atomic_t num_fclose;
325 atomic_t num_hardlinks;
326 atomic_t num_symlinks;
327 atomic_t num_locks;
328 atomic_t num_acl_get;
329 atomic_t num_acl_set;
330 #ifdef CONFIG_CIFS_STATS2
331 unsigned long long time_writes;
332 unsigned long long time_reads;
333 unsigned long long time_opens;
334 unsigned long long time_deletes;
335 unsigned long long time_closes;
336 unsigned long long time_mkdirs;
337 unsigned long long time_rmdirs;
338 unsigned long long time_renames;
339 unsigned long long time_t2renames;
340 unsigned long long time_ffirst;
341 unsigned long long time_fnext;
342 unsigned long long time_fclose;
343 #endif /* CONFIG_CIFS_STATS2 */
344 __u64 bytes_read;
345 __u64 bytes_written;
346 spinlock_t stat_lock;
347 #endif /* CONFIG_CIFS_STATS */
348 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
349 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
350 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
351 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
352 bool retry:1;
353 bool nocase:1;
354 bool seal:1; /* transport encryption for this mounted share */
355 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
356 for this mount even if server would support */
357 bool local_lease:1; /* check leases (only) on local system not remote */
358 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
359 bool need_reconnect:1; /* connection reset, tid now invalid */
360 #ifdef CONFIG_CIFS_FSCACHE
361 u64 resource_id; /* server resource id */
362 struct fscache_cookie *fscache; /* cookie for share */
363 #endif
364 /* BB add field for back pointer to sb struct(s)? */
365 };
366
367 /*
368 * This is a refcounted and timestamped container for a tcon pointer. The
369 * container holds a tcon reference. It is considered safe to free one of
370 * these when the tl_count goes to 0. The tl_time is the time of the last
371 * "get" on the container.
372 */
373 struct tcon_link {
374 struct rb_node tl_rbnode;
375 uid_t tl_uid;
376 unsigned long tl_flags;
377 #define TCON_LINK_MASTER 0
378 #define TCON_LINK_PENDING 1
379 #define TCON_LINK_IN_TREE 2
380 unsigned long tl_time;
381 atomic_t tl_count;
382 struct cifsTconInfo *tl_tcon;
383 };
384
385 extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
386
387 static inline struct cifsTconInfo *
tlink_tcon(struct tcon_link * tlink)388 tlink_tcon(struct tcon_link *tlink)
389 {
390 return tlink->tl_tcon;
391 }
392
393 extern void cifs_put_tlink(struct tcon_link *tlink);
394
395 static inline struct tcon_link *
cifs_get_tlink(struct tcon_link * tlink)396 cifs_get_tlink(struct tcon_link *tlink)
397 {
398 if (tlink && !IS_ERR(tlink))
399 atomic_inc(&tlink->tl_count);
400 return tlink;
401 }
402
403 /* This function is always expected to succeed */
404 extern struct cifsTconInfo *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
405
406 /*
407 * This info hangs off the cifsFileInfo structure, pointed to by llist.
408 * This is used to track byte stream locks on the file
409 */
410 struct cifsLockInfo {
411 struct list_head llist; /* pointer to next cifsLockInfo */
412 __u64 offset;
413 __u64 length;
414 __u8 type;
415 };
416
417 /*
418 * One of these for each open instance of a file
419 */
420 struct cifs_search_info {
421 loff_t index_of_last_entry;
422 __u16 entries_in_buffer;
423 __u16 info_level;
424 __u32 resume_key;
425 char *ntwrk_buf_start;
426 char *srch_entries_start;
427 char *last_entry;
428 char *presume_name;
429 unsigned int resume_name_len;
430 bool endOfSearch:1;
431 bool emptyDir:1;
432 bool unicode:1;
433 bool smallBuf:1; /* so we know which buf_release function to call */
434 };
435
436 struct cifsFileInfo {
437 struct list_head tlist; /* pointer to next fid owned by tcon */
438 struct list_head flist; /* next fid (file instance) for this inode */
439 unsigned int uid; /* allows finding which FileInfo structure */
440 __u32 pid; /* process id who opened file */
441 __u16 netfid; /* file id from remote */
442 /* BB add lock scope info here if needed */ ;
443 /* lock scope id (0 if none) */
444 struct dentry *dentry;
445 unsigned int f_flags;
446 struct tcon_link *tlink;
447 struct mutex lock_mutex;
448 struct list_head llist; /* list of byte range locks we have. */
449 bool invalidHandle:1; /* file closed via session abend */
450 bool oplock_break_cancelled:1;
451 int count; /* refcount protected by cifs_file_list_lock */
452 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
453 struct cifs_search_info srch_inf;
454 struct work_struct oplock_break; /* work for oplock breaks */
455 };
456
457 /*
458 * Take a reference on the file private data. Must be called with
459 * cifs_file_list_lock held.
460 */
cifsFileInfo_get(struct cifsFileInfo * cifs_file)461 static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
462 {
463 ++cifs_file->count;
464 }
465
466 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
467
468 /*
469 * One of these for each file inode
470 */
471
472 struct cifsInodeInfo {
473 struct list_head lockList;
474 /* BB add in lists for dirty pages i.e. write caching info for oplock */
475 struct list_head openFileList;
476 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
477 bool clientCanCacheRead; /* read oplock */
478 bool clientCanCacheAll; /* read and writebehind oplock */
479 bool delete_pending; /* DELETE_ON_CLOSE is set */
480 bool invalid_mapping; /* pagecache is invalid */
481 unsigned long time; /* jiffies of last update of inode */
482 u64 server_eof; /* current file size on server */
483 u64 uniqueid; /* server inode number */
484 u64 createtime; /* creation time on server */
485 #ifdef CONFIG_CIFS_FSCACHE
486 struct fscache_cookie *fscache;
487 #endif
488 struct inode vfs_inode;
489 };
490
491 static inline struct cifsInodeInfo *
CIFS_I(struct inode * inode)492 CIFS_I(struct inode *inode)
493 {
494 return container_of(inode, struct cifsInodeInfo, vfs_inode);
495 }
496
497 static inline struct cifs_sb_info *
CIFS_SB(struct super_block * sb)498 CIFS_SB(struct super_block *sb)
499 {
500 return sb->s_fs_info;
501 }
502
CIFS_DIR_SEP(const struct cifs_sb_info * cifs_sb)503 static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
504 {
505 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
506 return '/';
507 else
508 return '\\';
509 }
510
511 #ifdef CONFIG_CIFS_STATS
512 #define cifs_stats_inc atomic_inc
513
cifs_stats_bytes_written(struct cifsTconInfo * tcon,unsigned int bytes)514 static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
515 unsigned int bytes)
516 {
517 if (bytes) {
518 spin_lock(&tcon->stat_lock);
519 tcon->bytes_written += bytes;
520 spin_unlock(&tcon->stat_lock);
521 }
522 }
523
cifs_stats_bytes_read(struct cifsTconInfo * tcon,unsigned int bytes)524 static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
525 unsigned int bytes)
526 {
527 spin_lock(&tcon->stat_lock);
528 tcon->bytes_read += bytes;
529 spin_unlock(&tcon->stat_lock);
530 }
531 #else
532
533 #define cifs_stats_inc(field) do {} while (0)
534 #define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
535 #define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
536
537 #endif
538
539 struct mid_q_entry;
540
541 /*
542 * This is the prototype for the mid callback function. When creating one,
543 * take special care to avoid deadlocks. Things to bear in mind:
544 *
545 * - it will be called by cifsd
546 * - the GlobalMid_Lock will be held
547 * - the mid will be removed from the pending_mid_q list
548 */
549 typedef void (mid_callback_t)(struct mid_q_entry *mid);
550
551 /* one of these for every pending CIFS request to the server */
552 struct mid_q_entry {
553 struct list_head qhead; /* mids waiting on reply from this server */
554 __u16 mid; /* multiplex id */
555 __u16 pid; /* process id */
556 __u32 sequence_number; /* for CIFS signing */
557 unsigned long when_alloc; /* when mid was created */
558 #ifdef CONFIG_CIFS_STATS2
559 unsigned long when_sent; /* time when smb send finished */
560 unsigned long when_received; /* when demux complete (taken off wire) */
561 #endif
562 mid_callback_t *callback; /* call completion callback */
563 void *callback_data; /* general purpose pointer for callback */
564 struct smb_hdr *resp_buf; /* response buffer */
565 int midState; /* wish this were enum but can not pass to wait_event */
566 __u8 command; /* smb command code */
567 bool largeBuf:1; /* if valid response, is pointer to large buf */
568 bool multiRsp:1; /* multiple trans2 responses for one request */
569 bool multiEnd:1; /* both received */
570 };
571
572 struct oplock_q_entry {
573 struct list_head qhead;
574 struct inode *pinode;
575 struct cifsTconInfo *tcon;
576 __u16 netfid;
577 };
578
579 /* for pending dnotify requests */
580 struct dir_notify_req {
581 struct list_head lhead;
582 __le16 Pid;
583 __le16 PidHigh;
584 __u16 Mid;
585 __u16 Tid;
586 __u16 Uid;
587 __u16 netfid;
588 __u32 filter; /* CompletionFilter (for multishot) */
589 int multishot;
590 struct file *pfile;
591 };
592
593 struct dfs_info3_param {
594 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
595 int path_consumed;
596 int server_type;
597 int ref_flag;
598 char *path_name;
599 char *node_name;
600 };
601
602 /*
603 * common struct for holding inode info when searching for or updating an
604 * inode with new info
605 */
606
607 #define CIFS_FATTR_DFS_REFERRAL 0x1
608 #define CIFS_FATTR_DELETE_PENDING 0x2
609 #define CIFS_FATTR_NEED_REVAL 0x4
610 #define CIFS_FATTR_INO_COLLISION 0x8
611
612 struct cifs_fattr {
613 u32 cf_flags;
614 u32 cf_cifsattrs;
615 u64 cf_uniqueid;
616 u64 cf_eof;
617 u64 cf_bytes;
618 u64 cf_createtime;
619 uid_t cf_uid;
620 gid_t cf_gid;
621 umode_t cf_mode;
622 dev_t cf_rdev;
623 unsigned int cf_nlink;
624 unsigned int cf_dtype;
625 struct timespec cf_atime;
626 struct timespec cf_mtime;
627 struct timespec cf_ctime;
628 };
629
free_dfs_info_param(struct dfs_info3_param * param)630 static inline void free_dfs_info_param(struct dfs_info3_param *param)
631 {
632 if (param) {
633 kfree(param->path_name);
634 kfree(param->node_name);
635 kfree(param);
636 }
637 }
638
free_dfs_info_array(struct dfs_info3_param * param,int number_of_items)639 static inline void free_dfs_info_array(struct dfs_info3_param *param,
640 int number_of_items)
641 {
642 int i;
643 if ((number_of_items == 0) || (param == NULL))
644 return;
645 for (i = 0; i < number_of_items; i++) {
646 kfree(param[i].path_name);
647 kfree(param[i].node_name);
648 }
649 kfree(param);
650 }
651
652 #define MID_FREE 0
653 #define MID_REQUEST_ALLOCATED 1
654 #define MID_REQUEST_SUBMITTED 2
655 #define MID_RESPONSE_RECEIVED 4
656 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
657 #define MID_RESPONSE_MALFORMED 0x10
658
659 /* Types of response buffer returned from SendReceive2 */
660 #define CIFS_NO_BUFFER 0 /* Response buffer not returned */
661 #define CIFS_SMALL_BUFFER 1
662 #define CIFS_LARGE_BUFFER 2
663 #define CIFS_IOVEC 4 /* array of response buffers */
664
665 /* Type of Request to SendReceive2 */
666 #define CIFS_BLOCKING_OP 1 /* operation can block */
667 #define CIFS_ASYNC_OP 2 /* do not wait for response */
668 #define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
669 #define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
670 #define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
671 #define CIFS_NO_RESP 0x040 /* no response buffer required */
672
673 /* Security Flags: indicate type of session setup needed */
674 #define CIFSSEC_MAY_SIGN 0x00001
675 #define CIFSSEC_MAY_NTLM 0x00002
676 #define CIFSSEC_MAY_NTLMV2 0x00004
677 #define CIFSSEC_MAY_KRB5 0x00008
678 #ifdef CONFIG_CIFS_WEAK_PW_HASH
679 #define CIFSSEC_MAY_LANMAN 0x00010
680 #define CIFSSEC_MAY_PLNTXT 0x00020
681 #else
682 #define CIFSSEC_MAY_LANMAN 0
683 #define CIFSSEC_MAY_PLNTXT 0
684 #endif /* weak passwords */
685 #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
686 #define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
687
688 #define CIFSSEC_MUST_SIGN 0x01001
689 /* note that only one of the following can be set so the
690 result of setting MUST flags more than once will be to
691 require use of the stronger protocol */
692 #define CIFSSEC_MUST_NTLM 0x02002
693 #define CIFSSEC_MUST_NTLMV2 0x04004
694 #define CIFSSEC_MUST_KRB5 0x08008
695 #ifdef CONFIG_CIFS_WEAK_PW_HASH
696 #define CIFSSEC_MUST_LANMAN 0x10010
697 #define CIFSSEC_MUST_PLNTXT 0x20020
698 #ifdef CONFIG_CIFS_UPCALL
699 #define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
700 #else
701 #define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
702 #endif /* UPCALL */
703 #else /* do not allow weak pw hash */
704 #ifdef CONFIG_CIFS_UPCALL
705 #define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
706 #else
707 #define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
708 #endif /* UPCALL */
709 #endif /* WEAK_PW_HASH */
710 #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
711 #define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
712
713 #define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
714 #define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
715 #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
716 /*
717 *****************************************************************
718 * All constants go here
719 *****************************************************************
720 */
721
722 #define UID_HASH (16)
723
724 /*
725 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
726 * following to be declared.
727 */
728
729 /****************************************************************************
730 * Locking notes. All updates to global variables and lists should be
731 * protected by spinlocks or semaphores.
732 *
733 * Spinlocks
734 * ---------
735 * GlobalMid_Lock protects:
736 * list operations on pending_mid_q and oplockQ
737 * updates to XID counters, multiplex id and SMB sequence numbers
738 * cifs_file_list_lock protects:
739 * list operations on tcp and SMB session lists and tCon lists
740 * f_owner.lock protects certain per file struct operations
741 * mapping->page_lock protects certain per page operations
742 *
743 * Semaphores
744 * ----------
745 * sesSem operations on smb session
746 * tconSem operations on tree connection
747 * fh_sem file handle reconnection operations
748 *
749 ****************************************************************************/
750
751 #ifdef DECLARE_GLOBALS_HERE
752 #define GLOBAL_EXTERN
753 #else
754 #define GLOBAL_EXTERN extern
755 #endif
756
757 /*
758 * the list of TCP_Server_Info structures, ie each of the sockets
759 * connecting our client to a distinct server (ip address), is
760 * chained together by cifs_tcp_ses_list. The list of all our SMB
761 * sessions (and from that the tree connections) can be found
762 * by iterating over cifs_tcp_ses_list
763 */
764 GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
765
766 /*
767 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
768 * tcp session, and the list of tcon's per smb session. It also protects
769 * the reference counters for the server, smb session, and tcon. Finally,
770 * changes to the tcon->tidStatus should be done while holding this lock.
771 */
772 GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
773
774 /*
775 * This lock protects the cifs_file->llist and cifs_file->flist
776 * list operations, and updates to some flags (cifs_file->invalidHandle)
777 * It will be moved to either use the tcon->stat_lock or equivalent later.
778 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
779 * the cifs_tcp_ses_lock must be grabbed first and released last.
780 */
781 GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
782
783 /* Outstanding dir notify requests */
784 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
785 /* DirNotify response queue */
786 GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
787
788 /*
789 * Global transaction id (XID) information
790 */
791 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
792 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
793 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
794 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
795 /* on midQ entries */
796 /*
797 * Global counters, updated atomically
798 */
799 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
800 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
801 GLOBAL_EXTERN atomic_t tcpSesAllocCount;
802 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
803 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
804
805 /* Various Debug counters */
806 GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
807 #ifdef CONFIG_CIFS_STATS2
808 GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
809 GLOBAL_EXTERN atomic_t totSmBufAllocCount;
810 #endif
811 GLOBAL_EXTERN atomic_t smBufAllocCount;
812 GLOBAL_EXTERN atomic_t midCount;
813
814 /* Misc globals */
815 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
816 to be established on existing mount if we
817 have the uid/password or Kerberos credential
818 or equivalent for current user */
819 GLOBAL_EXTERN unsigned int oplockEnabled;
820 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
821 GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
822 with more secure ntlmssp2 challenge/resp */
823 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
824 GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
825 GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
826 GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
827 GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
828 GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
829
830 /* reconnect after this many failed echo attempts */
831 GLOBAL_EXTERN unsigned short echo_retries;
832
833 void cifs_oplock_break(struct work_struct *work);
834 void cifs_oplock_break_get(struct cifsFileInfo *cfile);
835 void cifs_oplock_break_put(struct cifsFileInfo *cfile);
836
837 extern const struct slow_work_ops cifs_oplock_break_ops;
838
839 #endif /* _CIFS_GLOB_H */
840