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1da177e4 LT |
1 | /* |
2 | * fs/cifs/cifsglob.h | |
3 | * | |
5815449d | 4 | * Copyright (C) International Business Machines Corp., 2002,2006 |
1da177e4 | 5 | * Author(s): Steve French (sfrench@us.ibm.com) |
7ee1af76 | 6 | * Jeremy Allison (jra@samba.org) |
1da177e4 LT |
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 | #include <linux/in.h> | |
20 | #include <linux/in6.h> | |
21 | #include "cifs_fs_sb.h" | |
22 | /* | |
23 | * The sizes of various internal tables and strings | |
24 | */ | |
25 | #define MAX_UID_INFO 16 | |
26 | #define MAX_SES_INFO 2 | |
27 | #define MAX_TCON_INFO 4 | |
28 | ||
29 | #define MAX_TREE_SIZE 2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1 | |
30 | #define MAX_SERVER_SIZE 15 | |
31 | #define MAX_SHARE_SIZE 64 /* used to be 20 - this should still be enough */ | |
32 | #define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null | |
33 | termination then *2 for unicode versions */ | |
34 | #define MAX_PASSWORD_SIZE 16 | |
35 | ||
36 | #define CIFS_MIN_RCV_POOL 4 | |
37 | ||
38 | /* | |
39 | * MAX_REQ is the maximum number of requests that WE will send | |
40 | * on one socket concurently. It also matches the most common | |
41 | * value of max multiplex returned by servers. We may | |
42 | * eventually want to use the negotiated value (in case | |
43 | * future servers can handle more) when we are more confident that | |
44 | * we will not have problems oveloading the socket with pending | |
45 | * write data. | |
46 | */ | |
47 | #define CIFS_MAX_REQ 50 | |
48 | ||
49 | #define SERVER_NAME_LENGTH 15 | |
50 | #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) | |
51 | ||
52 | /* used to define string lengths for reversing unicode strings */ | |
53 | /* (256+1)*2 = 514 */ | |
54 | /* (max path length + 1 for null) * 2 for unicode */ | |
55 | #define MAX_NAME 514 | |
56 | ||
57 | #include "cifspdu.h" | |
58 | ||
59 | #ifndef FALSE | |
60 | #define FALSE 0 | |
61 | #endif | |
62 | ||
63 | #ifndef TRUE | |
64 | #define TRUE 1 | |
65 | #endif | |
66 | ||
67 | #ifndef XATTR_DOS_ATTRIB | |
68 | #define XATTR_DOS_ATTRIB "user.DOSATTRIB" | |
69 | #endif | |
70 | ||
71 | /* | |
72 | * This information is kept on every Server we know about. | |
73 | * | |
74 | * Some things to note: | |
75 | * | |
76 | */ | |
77 | #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) | |
78 | ||
79 | /* | |
80 | * CIFS vfs client Status information (based on what we know.) | |
81 | */ | |
82 | ||
83 | /* associated with each tcp and smb session */ | |
84 | enum statusEnum { | |
85 | CifsNew = 0, | |
86 | CifsGood, | |
87 | CifsExiting, | |
88 | CifsNeedReconnect | |
89 | }; | |
90 | ||
91 | enum securityEnum { | |
3979877e SF |
92 | LANMAN = 0, /* Legacy LANMAN auth */ |
93 | NTLM, /* Legacy NTLM012 auth with NTLM hash */ | |
1da177e4 LT |
94 | NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */ |
95 | RawNTLMSSP, /* NTLMSSP without SPNEGO */ | |
96 | NTLMSSP, /* NTLMSSP via SPNEGO */ | |
97 | Kerberos /* Kerberos via SPNEGO */ | |
98 | }; | |
99 | ||
100 | enum protocolEnum { | |
101 | IPV4 = 0, | |
102 | IPV6, | |
103 | SCTP | |
104 | /* Netbios frames protocol not supported at this time */ | |
105 | }; | |
106 | ||
107 | /* | |
108 | ***************************************************************** | |
109 | * Except the CIFS PDUs themselves all the | |
110 | * globally interesting structs should go here | |
111 | ***************************************************************** | |
112 | */ | |
113 | ||
114 | struct TCP_Server_Info { | |
a10faeb2 SF |
115 | /* 15 character server name + 0x20 16th byte indicating type = srv */ |
116 | char server_RFC1001_name[SERVER_NAME_LEN_WITH_NULL]; | |
d3485d37 | 117 | char unicode_server_Name[SERVER_NAME_LEN_WITH_NULL * 2]; |
1da177e4 LT |
118 | struct socket *ssocket; |
119 | union { | |
120 | struct sockaddr_in sockAddr; | |
121 | struct sockaddr_in6 sockAddr6; | |
122 | } addr; | |
123 | wait_queue_head_t response_q; | |
124 | wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ | |
125 | struct list_head pending_mid_q; | |
126 | void *Server_NlsInfo; /* BB - placeholder for future NLS info */ | |
127 | unsigned short server_codepage; /* codepage for the server */ | |
131afd0b | 128 | unsigned long ip_address; /* IP addr for the server if known */ |
1da177e4 LT |
129 | enum protocolEnum protocolType; |
130 | char versionMajor; | |
131 | char versionMinor; | |
132 | unsigned svlocal:1; /* local server or remote */ | |
133 | atomic_t socketUseCount; /* number of open cifs sessions on socket */ | |
134 | atomic_t inFlight; /* number of requests on the wire to server */ | |
131afd0b SF |
135 | #ifdef CONFIG_CIFS_STATS2 |
136 | atomic_t inSend; /* requests trying to send */ | |
137 | atomic_t num_waiters; /* blocked waiting to get in sendrecv */ | |
138 | #endif | |
1da177e4 LT |
139 | enum statusEnum tcpStatus; /* what we think the status is */ |
140 | struct semaphore tcpSem; | |
141 | struct task_struct *tsk; | |
142 | char server_GUID[16]; | |
143 | char secMode; | |
144 | enum securityEnum secType; | |
145 | unsigned int maxReq; /* Clients should submit no more */ | |
146 | /* than maxReq distinct unanswered SMBs to the server when using */ | |
147 | /* multiplexed reads or writes */ | |
148 | unsigned int maxBuf; /* maxBuf specifies the maximum */ | |
149 | /* message size the server can send or receive for non-raw SMBs */ | |
150 | unsigned int maxRw; /* maxRw specifies the maximum */ | |
151 | /* message size the server can send or receive for */ | |
152 | /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ | |
153 | char sessid[4]; /* unique token id for this session */ | |
154 | /* (returned on Negotiate */ | |
155 | int capabilities; /* allow selective disabling of caps by smb sess */ | |
175ec9e1 | 156 | __u16 timeAdj; /* Adjust for difference in server time zone in sec */ |
1982c344 | 157 | __u16 CurrentMid; /* multiplex id - rotating counter */ |
1da177e4 | 158 | char cryptKey[CIFS_CRYPTO_KEY_SIZE]; |
a10faeb2 SF |
159 | /* 16th byte of RFC1001 workstation name is always null */ |
160 | char workstation_RFC1001_name[SERVER_NAME_LEN_WITH_NULL]; | |
ad009ac9 | 161 | __u32 sequence_number; /* needed for CIFS PDU signature */ |
3a5ff61c SF |
162 | char mac_signing_key[CIFS_SESS_KEY_SIZE + 16]; |
163 | unsigned long lstrp; /* when we got last response from this server */ | |
1da177e4 LT |
164 | }; |
165 | ||
166 | /* | |
167 | * The following is our shortcut to user information. We surface the uid, | |
168 | * and name. We always get the password on the fly in case it | |
169 | * has changed. We also hang a list of sessions owned by this user off here. | |
170 | */ | |
171 | struct cifsUidInfo { | |
172 | struct list_head userList; | |
173 | struct list_head sessionList; /* SMB sessions for this user */ | |
174 | uid_t linux_uid; | |
175 | char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */ | |
176 | /* BB may need ptr or callback for PAM or WinBind info */ | |
177 | }; | |
178 | ||
179 | /* | |
180 | * Session structure. One of these for each uid session with a particular host | |
181 | */ | |
182 | struct cifsSesInfo { | |
183 | struct list_head cifsSessionList; | |
184 | struct semaphore sesSem; | |
3979877e | 185 | #if 0 |
1da177e4 | 186 | struct cifsUidInfo *uidInfo; /* pointer to user info */ |
3979877e | 187 | #endif |
1da177e4 LT |
188 | struct TCP_Server_Info *server; /* pointer to server info */ |
189 | atomic_t inUse; /* # of mounts (tree connections) on this ses */ | |
190 | enum statusEnum status; | |
750d1151 | 191 | unsigned overrideSecFlg; /* if non-zero override global sec flags */ |
1da177e4 LT |
192 | __u16 ipc_tid; /* special tid for connection to IPC share */ |
193 | __u16 flags; | |
ad009ac9 SF |
194 | char *serverOS; /* name of operating system underlying server */ |
195 | char *serverNOS; /* name of network operating system of server */ | |
1da177e4 LT |
196 | char *serverDomain; /* security realm of server */ |
197 | int Suid; /* remote smb uid */ | |
198 | uid_t linux_uid; /* local Linux uid */ | |
199 | int capabilities; | |
ad009ac9 SF |
200 | char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for |
201 | TCP names - will ipv6 and sctp addresses fit? */ | |
1da177e4 | 202 | char userName[MAX_USERNAME_SIZE + 1]; |
3979877e | 203 | char * domainName; |
1da177e4 LT |
204 | char * password; |
205 | }; | |
206 | /* session flags */ | |
207 | #define CIFS_SES_NT4 1 | |
208 | ||
209 | /* | |
210 | * there is one of these for each connection to a resource on a particular | |
211 | * session | |
212 | */ | |
213 | struct cifsTconInfo { | |
214 | struct list_head cifsConnectionList; | |
215 | struct list_head openFileList; | |
216 | struct semaphore tconSem; | |
217 | struct cifsSesInfo *ses; /* pointer to session associated with */ | |
254e55ed | 218 | char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ |
1da177e4 LT |
219 | char *nativeFileSystem; |
220 | __u16 tid; /* The 2 byte tree id */ | |
221 | __u16 Flags; /* optional support bits */ | |
222 | enum statusEnum tidStatus; | |
254e55ed | 223 | atomic_t useCount; /* how many explicit/implicit mounts to share */ |
1da177e4 LT |
224 | #ifdef CONFIG_CIFS_STATS |
225 | atomic_t num_smbs_sent; | |
226 | atomic_t num_writes; | |
227 | atomic_t num_reads; | |
228 | atomic_t num_oplock_brks; | |
229 | atomic_t num_opens; | |
a5a2b489 | 230 | atomic_t num_closes; |
1da177e4 LT |
231 | atomic_t num_deletes; |
232 | atomic_t num_mkdirs; | |
233 | atomic_t num_rmdirs; | |
234 | atomic_t num_renames; | |
235 | atomic_t num_t2renames; | |
dfb7533b SF |
236 | atomic_t num_ffirst; |
237 | atomic_t num_fnext; | |
238 | atomic_t num_fclose; | |
a5a2b489 SF |
239 | atomic_t num_hardlinks; |
240 | atomic_t num_symlinks; | |
241 | atomic_t num_locks; | |
0a4b92c0 SF |
242 | atomic_t num_acl_get; |
243 | atomic_t num_acl_set; | |
a5a2b489 SF |
244 | #ifdef CONFIG_CIFS_STATS2 |
245 | unsigned long long time_writes; | |
246 | unsigned long long time_reads; | |
247 | unsigned long long time_opens; | |
248 | unsigned long long time_deletes; | |
249 | unsigned long long time_closes; | |
250 | unsigned long long time_mkdirs; | |
251 | unsigned long long time_rmdirs; | |
252 | unsigned long long time_renames; | |
253 | unsigned long long time_t2renames; | |
254 | unsigned long long time_ffirst; | |
255 | unsigned long long time_fnext; | |
256 | unsigned long long time_fclose; | |
257 | #endif /* CONFIG_CIFS_STATS2 */ | |
1da177e4 LT |
258 | __u64 bytes_read; |
259 | __u64 bytes_written; | |
260 | spinlock_t stat_lock; | |
a5a2b489 | 261 | #endif /* CONFIG_CIFS_STATS */ |
1da177e4 | 262 | FILE_SYSTEM_DEVICE_INFO fsDevInfo; |
254e55ed | 263 | FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ |
1da177e4 LT |
264 | FILE_SYSTEM_UNIX_INFO fsUnixInfo; |
265 | unsigned retry:1; | |
d3485d37 | 266 | unsigned nocase:1; |
1da177e4 LT |
267 | /* BB add field for back pointer to sb struct? */ |
268 | }; | |
269 | ||
270 | /* | |
7ee1af76 JA |
271 | * This info hangs off the cifsFileInfo structure, pointed to by llist. |
272 | * This is used to track byte stream locks on the file | |
1da177e4 LT |
273 | */ |
274 | struct cifsLockInfo { | |
7ee1af76 JA |
275 | struct list_head llist; /* pointer to next cifsLockInfo */ |
276 | __u64 offset; | |
277 | __u64 length; | |
278 | __u8 type; | |
1da177e4 LT |
279 | }; |
280 | ||
281 | /* | |
282 | * One of these for each open instance of a file | |
283 | */ | |
284 | struct cifs_search_info { | |
285 | loff_t index_of_last_entry; | |
286 | __u16 entries_in_buffer; | |
287 | __u16 info_level; | |
288 | __u32 resume_key; | |
289 | char * ntwrk_buf_start; | |
290 | char * srch_entries_start; | |
291 | char * presume_name; | |
292 | unsigned int resume_name_len; | |
293 | unsigned endOfSearch:1; | |
294 | unsigned emptyDir:1; | |
295 | unsigned unicode:1; | |
ec637e3f | 296 | unsigned smallBuf:1; /* so we know which buf_release function to call */ |
1da177e4 LT |
297 | }; |
298 | ||
299 | struct cifsFileInfo { | |
300 | struct list_head tlist; /* pointer to next fid owned by tcon */ | |
301 | struct list_head flist; /* next fid (file instance) for this inode */ | |
302 | unsigned int uid; /* allows finding which FileInfo structure */ | |
303 | __u32 pid; /* process id who opened file */ | |
304 | __u16 netfid; /* file id from remote */ | |
305 | /* BB add lock scope info here if needed */ ; | |
306 | /* lock scope id (0 if none) */ | |
307 | struct file * pfile; /* needed for writepage */ | |
308 | struct inode * pInode; /* needed for oplock break */ | |
7ee1af76 JA |
309 | struct semaphore lock_sem; |
310 | struct list_head llist; /* list of byte range locks we have. */ | |
1da177e4 LT |
311 | unsigned closePend:1; /* file is marked to close */ |
312 | unsigned invalidHandle:1; /* file closed via session abend */ | |
23e7dd7d | 313 | atomic_t wrtPending; /* handle in use - defer close */ |
1da177e4 LT |
314 | struct semaphore fh_sem; /* prevents reopen race after dead ses*/ |
315 | char * search_resume_name; /* BB removeme BB */ | |
1da177e4 LT |
316 | struct cifs_search_info srch_inf; |
317 | }; | |
318 | ||
319 | /* | |
320 | * One of these for each file inode | |
321 | */ | |
322 | ||
323 | struct cifsInodeInfo { | |
324 | struct list_head lockList; | |
325 | /* BB add in lists for dirty pages - i.e. write caching info for oplock */ | |
326 | struct list_head openFileList; | |
327 | int write_behind_rc; | |
328 | __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ | |
329 | atomic_t inUse; /* num concurrent users (local openers cifs) of file*/ | |
330 | unsigned long time; /* jiffies of last update/check of inode */ | |
331 | unsigned clientCanCacheRead:1; /* read oplock */ | |
332 | unsigned clientCanCacheAll:1; /* read and writebehind oplock */ | |
333 | unsigned oplockPending:1; | |
334 | struct inode vfs_inode; | |
335 | }; | |
336 | ||
337 | static inline struct cifsInodeInfo * | |
338 | CIFS_I(struct inode *inode) | |
339 | { | |
340 | return container_of(inode, struct cifsInodeInfo, vfs_inode); | |
341 | } | |
342 | ||
343 | static inline struct cifs_sb_info * | |
344 | CIFS_SB(struct super_block *sb) | |
345 | { | |
346 | return sb->s_fs_info; | |
347 | } | |
348 | ||
ab2f218f | 349 | static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) |
ac67055e JA |
350 | { |
351 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) | |
352 | return '/'; | |
353 | else | |
354 | return '\\'; | |
355 | } | |
1da177e4 | 356 | |
a4544347 SF |
357 | #ifdef CONFIG_CIFS_STATS |
358 | #define cifs_stats_inc atomic_inc | |
359 | ||
360 | static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon, | |
361 | unsigned int bytes) | |
362 | { | |
363 | if (bytes) { | |
364 | spin_lock(&tcon->stat_lock); | |
365 | tcon->bytes_written += bytes; | |
366 | spin_unlock(&tcon->stat_lock); | |
367 | } | |
368 | } | |
369 | ||
370 | static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon, | |
371 | unsigned int bytes) | |
372 | { | |
373 | spin_lock(&tcon->stat_lock); | |
374 | tcon->bytes_read += bytes; | |
375 | spin_unlock(&tcon->stat_lock); | |
376 | } | |
377 | #else | |
378 | ||
379 | #define cifs_stats_inc(field) do {} while(0) | |
380 | #define cifs_stats_bytes_written(tcon, bytes) do {} while(0) | |
381 | #define cifs_stats_bytes_read(tcon, bytes) do {} while(0) | |
382 | ||
383 | #endif | |
384 | ||
1da177e4 LT |
385 | /* one of these for every pending CIFS request to the server */ |
386 | struct mid_q_entry { | |
387 | struct list_head qhead; /* mids waiting on reply from this server */ | |
388 | __u16 mid; /* multiplex id */ | |
389 | __u16 pid; /* process id */ | |
390 | __u32 sequence_number; /* for CIFS signing */ | |
1047abc1 SF |
391 | unsigned long when_alloc; /* when mid was created */ |
392 | #ifdef CONFIG_CIFS_STATS2 | |
393 | unsigned long when_sent; /* time when smb send finished */ | |
394 | unsigned long when_received; /* when demux complete (taken off wire) */ | |
395 | #endif | |
1da177e4 LT |
396 | struct cifsSesInfo *ses; /* smb was sent to this server */ |
397 | struct task_struct *tsk; /* task waiting for response */ | |
398 | struct smb_hdr *resp_buf; /* response buffer */ | |
399 | int midState; /* wish this were enum but can not pass to wait_event */ | |
c81156dd | 400 | __u8 command; /* smb command code */ |
c81156dd | 401 | unsigned largeBuf:1; /* if valid response, is pointer to large buf */ |
3979877e SF |
402 | unsigned multiRsp:1; /* multiple trans2 responses for one request */ |
403 | unsigned multiEnd:1; /* both received */ | |
1da177e4 LT |
404 | }; |
405 | ||
406 | struct oplock_q_entry { | |
407 | struct list_head qhead; | |
408 | struct inode * pinode; | |
409 | struct cifsTconInfo * tcon; | |
410 | __u16 netfid; | |
411 | }; | |
412 | ||
ff5dbd9e SF |
413 | /* for pending dnotify requests */ |
414 | struct dir_notify_req { | |
415 | struct list_head lhead; | |
416 | __le16 Pid; | |
417 | __le16 PidHigh; | |
418 | __u16 Mid; | |
419 | __u16 Tid; | |
420 | __u16 Uid; | |
421 | __u16 netfid; | |
422 | __u32 filter; /* CompletionFilter (for multishot) */ | |
423 | int multishot; | |
e22cb8bc | 424 | struct file * pfile; |
ff5dbd9e SF |
425 | }; |
426 | ||
1da177e4 LT |
427 | #define MID_FREE 0 |
428 | #define MID_REQUEST_ALLOCATED 1 | |
429 | #define MID_REQUEST_SUBMITTED 2 | |
430 | #define MID_RESPONSE_RECEIVED 4 | |
431 | #define MID_RETRY_NEEDED 8 /* session closed while this request out */ | |
432 | #define MID_NO_RESP_NEEDED 0x10 | |
ec637e3f SF |
433 | |
434 | /* Types of response buffer returned from SendReceive2 */ | |
435 | #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ | |
436 | #define CIFS_SMALL_BUFFER 1 | |
437 | #define CIFS_LARGE_BUFFER 2 | |
438 | #define CIFS_IOVEC 4 /* array of response buffers */ | |
1da177e4 | 439 | |
3979877e SF |
440 | /* Security Flags: indicate type of session setup needed */ |
441 | #define CIFSSEC_MAY_SIGN 0x00001 | |
442 | #define CIFSSEC_MAY_NTLM 0x00002 | |
443 | #define CIFSSEC_MAY_NTLMV2 0x00004 | |
444 | #define CIFSSEC_MAY_KRB5 0x00008 | |
445 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
446 | #define CIFSSEC_MAY_LANMAN 0x00010 | |
447 | #define CIFSSEC_MAY_PLNTXT 0x00020 | |
448 | #endif /* weak passwords */ | |
449 | #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ | |
450 | ||
451 | #define CIFSSEC_MUST_SIGN 0x01001 | |
452 | /* note that only one of the following can be set so the | |
453 | result of setting MUST flags more than once will be to | |
454 | require use of the stronger protocol */ | |
455 | #define CIFSSEC_MUST_NTLM 0x02002 | |
456 | #define CIFSSEC_MUST_NTLMV2 0x04004 | |
457 | #define CIFSSEC_MUST_KRB5 0x08008 | |
458 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
459 | #define CIFSSEC_MUST_LANMAN 0x10010 | |
460 | #define CIFSSEC_MUST_PLNTXT 0x20020 | |
461 | #define CIFSSEC_MASK 0x37037 /* current flags supported if weak */ | |
462 | #else | |
463 | #define CIFSSEC_MASK 0x07007 /* flags supported if no weak config */ | |
464 | #endif /* WEAK_PW_HASH */ | |
465 | #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ | |
466 | ||
467 | #define CIFSSEC_DEF CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | |
468 | #define CIFSSEC_MAX CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2 | |
1da177e4 LT |
469 | /* |
470 | ***************************************************************** | |
471 | * All constants go here | |
472 | ***************************************************************** | |
473 | */ | |
474 | ||
475 | #define UID_HASH (16) | |
476 | ||
477 | /* | |
478 | * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the | |
479 | * following to be declared. | |
480 | */ | |
481 | ||
482 | /**************************************************************************** | |
483 | * Locking notes. All updates to global variables and lists should be | |
484 | * protected by spinlocks or semaphores. | |
485 | * | |
486 | * Spinlocks | |
487 | * --------- | |
488 | * GlobalMid_Lock protects: | |
489 | * list operations on pending_mid_q and oplockQ | |
490 | * updates to XID counters, multiplex id and SMB sequence numbers | |
491 | * GlobalSMBSesLock protects: | |
492 | * list operations on tcp and SMB session lists and tCon lists | |
493 | * f_owner.lock protects certain per file struct operations | |
494 | * mapping->page_lock protects certain per page operations | |
495 | * | |
496 | * Semaphores | |
497 | * ---------- | |
498 | * sesSem operations on smb session | |
499 | * tconSem operations on tree connection | |
500 | * fh_sem file handle reconnection operations | |
501 | * | |
502 | ****************************************************************************/ | |
503 | ||
504 | #ifdef DECLARE_GLOBALS_HERE | |
505 | #define GLOBAL_EXTERN | |
506 | #else | |
507 | #define GLOBAL_EXTERN extern | |
508 | #endif | |
509 | ||
510 | /* | |
511 | * The list of servers that did not respond with NT LM 0.12. | |
512 | * This list helps improve performance and eliminate the messages indicating | |
513 | * that we had a communications error talking to the server in this list. | |
514 | */ | |
2cd646a2 SF |
515 | /* Feature not supported */ |
516 | /* GLOBAL_EXTERN struct servers_not_supported *NotSuppList; */ | |
1da177e4 LT |
517 | |
518 | /* | |
519 | * The following is a hash table of all the users we know about. | |
520 | */ | |
521 | GLOBAL_EXTERN struct smbUidInfo *GlobalUidList[UID_HASH]; | |
522 | ||
523 | GLOBAL_EXTERN struct list_head GlobalServerList; /* BB not implemented yet */ | |
524 | GLOBAL_EXTERN struct list_head GlobalSMBSessionList; | |
525 | GLOBAL_EXTERN struct list_head GlobalTreeConnectionList; | |
526 | GLOBAL_EXTERN rwlock_t GlobalSMBSeslock; /* protects list inserts on 3 above */ | |
527 | ||
528 | GLOBAL_EXTERN struct list_head GlobalOplock_Q; | |
529 | ||
ff5dbd9e | 530 | GLOBAL_EXTERN struct list_head GlobalDnotifyReqList; /* Outstanding dir notify requests */ |
254e55ed | 531 | GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;/* DirNotify response queue */ |
ff5dbd9e | 532 | |
1da177e4 LT |
533 | /* |
534 | * Global transaction id (XID) information | |
535 | */ | |
536 | GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ | |
254e55ed | 537 | GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ |
1da177e4 | 538 | GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ |
254e55ed SF |
539 | GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */ |
540 | /* on midQ entries */ | |
1da177e4 LT |
541 | GLOBAL_EXTERN char Local_System_Name[15]; |
542 | ||
543 | /* | |
544 | * Global counters, updated atomically | |
545 | */ | |
546 | GLOBAL_EXTERN atomic_t sesInfoAllocCount; | |
547 | GLOBAL_EXTERN atomic_t tconInfoAllocCount; | |
548 | GLOBAL_EXTERN atomic_t tcpSesAllocCount; | |
549 | GLOBAL_EXTERN atomic_t tcpSesReconnectCount; | |
550 | GLOBAL_EXTERN atomic_t tconInfoReconnectCount; | |
551 | ||
552 | /* Various Debug counters to remove someday (BB) */ | |
4498eed5 SF |
553 | GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */ |
554 | #ifdef CONFIG_CIFS_STATS2 | |
555 | GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */ | |
556 | GLOBAL_EXTERN atomic_t totSmBufAllocCount; | |
557 | #endif | |
558 | GLOBAL_EXTERN atomic_t smBufAllocCount; | |
1da177e4 LT |
559 | GLOBAL_EXTERN atomic_t midCount; |
560 | ||
561 | /* Misc globals */ | |
254e55ed | 562 | GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions |
1da177e4 LT |
563 | to be established on existing mount if we |
564 | have the uid/password or Kerberos credential | |
565 | or equivalent for current user */ | |
566 | GLOBAL_EXTERN unsigned int oplockEnabled; | |
567 | GLOBAL_EXTERN unsigned int experimEnabled; | |
568 | GLOBAL_EXTERN unsigned int lookupCacheEnabled; | |
569 | GLOBAL_EXTERN unsigned int extended_security; /* if on, session setup sent | |
570 | with more secure ntlmssp2 challenge/resp */ | |
1da177e4 LT |
571 | GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ |
572 | GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ | |
573 | GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */ | |
574 | GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ | |
575 | GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */ | |
576 | GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/ | |
577 |