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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 64 /* used to be 20, this should still be enough */ | |
41 | #define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null | |
42 | termination then *2 for unicode versions */ | |
43 | #define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */ | |
44 | ||
45 | #define CIFS_MIN_RCV_POOL 4 | |
46 | ||
47 | /* | |
48 | * default attribute cache timeout (jiffies) | |
49 | */ | |
50 | #define CIFS_DEF_ACTIMEO (1 * HZ) | |
51 | ||
52 | /* | |
53 | * max attribute cache timeout (jiffies) - 2^30 | |
54 | */ | |
55 | #define CIFS_MAX_ACTIMEO (1 << 30) | |
56 | ||
57 | /* | |
58 | * MAX_REQ is the maximum number of requests that WE will send | |
59 | * on one socket concurrently. It also matches the most common | |
60 | * value of max multiplex returned by servers. We may | |
61 | * eventually want to use the negotiated value (in case | |
62 | * future servers can handle more) when we are more confident that | |
63 | * we will not have problems oveloading the socket with pending | |
64 | * write data. | |
65 | */ | |
66 | #define CIFS_MAX_REQ 50 | |
67 | ||
68 | #define RFC1001_NAME_LEN 15 | |
69 | #define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1) | |
70 | ||
71 | /* currently length of NIP6_FMT */ | |
72 | #define SERVER_NAME_LENGTH 40 | |
73 | #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) | |
74 | ||
75 | /* used to define string lengths for reversing unicode strings */ | |
76 | /* (256+1)*2 = 514 */ | |
77 | /* (max path length + 1 for null) * 2 for unicode */ | |
78 | #define MAX_NAME 514 | |
79 | ||
80 | #include "cifspdu.h" | |
81 | ||
82 | #ifndef XATTR_DOS_ATTRIB | |
83 | #define XATTR_DOS_ATTRIB "user.DOSATTRIB" | |
84 | #endif | |
85 | ||
86 | /* | |
87 | * CIFS vfs client Status information (based on what we know.) | |
88 | */ | |
89 | ||
90 | /* associated with each tcp and smb session */ | |
91 | enum statusEnum { | |
92 | CifsNew = 0, | |
93 | CifsGood, | |
94 | CifsExiting, | |
95 | CifsNeedReconnect | |
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 | ||
231 | static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) | |
232 | { | |
233 | return srv->net; | |
234 | } | |
235 | ||
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 | ||
243 | static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv) | |
244 | { | |
245 | return &init_net; | |
246 | } | |
247 | ||
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 userName[MAX_USERNAME_SIZE + 1]; | |
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 * | |
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 * | |
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 | */ | |
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 * | |
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 * | |
498 | CIFS_SB(struct super_block *sb) | |
499 | { | |
500 | return sb->s_fs_info; | |
501 | } | |
502 | ||
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 | ||
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 | ||
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 | ||
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 | ||
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 experimEnabled; | |
821 | GLOBAL_EXTERN unsigned int lookupCacheEnabled; | |
822 | GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent | |
823 | with more secure ntlmssp2 challenge/resp */ | |
824 | GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ | |
825 | GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ | |
826 | GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */ | |
827 | GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ | |
828 | GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */ | |
829 | GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/ | |
830 | ||
831 | /* reconnect after this many failed echo attempts */ | |
832 | GLOBAL_EXTERN unsigned short echo_retries; | |
833 | ||
834 | void cifs_oplock_break(struct work_struct *work); | |
835 | void cifs_oplock_break_get(struct cifsFileInfo *cfile); | |
836 | void cifs_oplock_break_put(struct cifsFileInfo *cfile); | |
837 | ||
838 | extern const struct slow_work_ops cifs_oplock_break_ops; | |
839 | ||
840 | #endif /* _CIFS_GLOB_H */ |