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1 | /* | |
2 | * fs/cifs/cifsglob.h | |
3 | * | |
4 | * Copyright (C) International Business Machines Corp., 2002,2007 | |
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 | #include <linux/in.h> | |
20 | #include <linux/in6.h> | |
21 | #include "cifs_fs_sb.h" | |
22 | #include "cifsacl.h" | |
23 | /* | |
24 | * The sizes of various internal tables and strings | |
25 | */ | |
26 | #define MAX_UID_INFO 16 | |
27 | #define MAX_SES_INFO 2 | |
28 | #define MAX_TCON_INFO 4 | |
29 | ||
30 | #define MAX_TREE_SIZE 2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1 | |
31 | #define MAX_SERVER_SIZE 15 | |
32 | #define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */ | |
33 | #define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null | |
34 | termination then *2 for unicode versions */ | |
35 | #define MAX_PASSWORD_SIZE 16 | |
36 | ||
37 | #define CIFS_MIN_RCV_POOL 4 | |
38 | ||
39 | /* | |
40 | * MAX_REQ is the maximum number of requests that WE will send | |
41 | * on one socket concurently. It also matches the most common | |
42 | * value of max multiplex returned by servers. We may | |
43 | * eventually want to use the negotiated value (in case | |
44 | * future servers can handle more) when we are more confident that | |
45 | * we will not have problems oveloading the socket with pending | |
46 | * write data. | |
47 | */ | |
48 | #define CIFS_MAX_REQ 50 | |
49 | ||
50 | #define SERVER_NAME_LENGTH 15 | |
51 | #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) | |
52 | ||
53 | /* used to define string lengths for reversing unicode strings */ | |
54 | /* (256+1)*2 = 514 */ | |
55 | /* (max path length + 1 for null) * 2 for unicode */ | |
56 | #define MAX_NAME 514 | |
57 | ||
58 | #include "cifspdu.h" | |
59 | ||
60 | #ifndef FALSE | |
61 | #define FALSE 0 | |
62 | #endif | |
63 | ||
64 | #ifndef TRUE | |
65 | #define TRUE 1 | |
66 | #endif | |
67 | ||
68 | #ifndef XATTR_DOS_ATTRIB | |
69 | #define XATTR_DOS_ATTRIB "user.DOSATTRIB" | |
70 | #endif | |
71 | ||
72 | /* | |
73 | * This information is kept on every Server we know about. | |
74 | * | |
75 | * Some things to note: | |
76 | * | |
77 | */ | |
78 | #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1) | |
79 | ||
80 | /* | |
81 | * CIFS vfs client Status information (based on what we know.) | |
82 | */ | |
83 | ||
84 | /* associated with each tcp and smb session */ | |
85 | enum statusEnum { | |
86 | CifsNew = 0, | |
87 | CifsGood, | |
88 | CifsExiting, | |
89 | CifsNeedReconnect | |
90 | }; | |
91 | ||
92 | enum securityEnum { | |
93 | PLAINTXT = 0, /* Legacy with Plaintext passwords */ | |
94 | LANMAN, /* Legacy LANMAN auth */ | |
95 | NTLM, /* Legacy NTLM012 auth with NTLM hash */ | |
96 | NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */ | |
97 | RawNTLMSSP, /* NTLMSSP without SPNEGO */ | |
98 | NTLMSSP, /* NTLMSSP via SPNEGO */ | |
99 | Kerberos /* Kerberos via SPNEGO */ | |
100 | }; | |
101 | ||
102 | enum protocolEnum { | |
103 | IPV4 = 0, | |
104 | IPV6, | |
105 | SCTP | |
106 | /* Netbios frames protocol not supported at this time */ | |
107 | }; | |
108 | ||
109 | struct mac_key { | |
110 | unsigned int len; | |
111 | union { | |
112 | char ntlm[CIFS_SESS_KEY_SIZE + 16]; | |
113 | struct { | |
114 | char key[16]; | |
115 | struct ntlmv2_resp resp; | |
116 | } ntlmv2; | |
117 | } data; | |
118 | }; | |
119 | ||
120 | struct cifs_cred { | |
121 | int uid; | |
122 | int gid; | |
123 | int mode; | |
124 | int cecount; | |
125 | struct cifs_sid osid; | |
126 | struct cifs_sid gsid; | |
127 | struct cifs_ntace *ntaces; | |
128 | struct cifs_ace *aces; | |
129 | }; | |
130 | ||
131 | /* | |
132 | ***************************************************************** | |
133 | * Except the CIFS PDUs themselves all the | |
134 | * globally interesting structs should go here | |
135 | ***************************************************************** | |
136 | */ | |
137 | ||
138 | struct TCP_Server_Info { | |
139 | /* 15 character server name + 0x20 16th byte indicating type = srv */ | |
140 | char server_RFC1001_name[SERVER_NAME_LEN_WITH_NULL]; | |
141 | char unicode_server_Name[SERVER_NAME_LEN_WITH_NULL * 2]; | |
142 | struct socket *ssocket; | |
143 | union { | |
144 | struct sockaddr_in sockAddr; | |
145 | struct sockaddr_in6 sockAddr6; | |
146 | } addr; | |
147 | wait_queue_head_t response_q; | |
148 | wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ | |
149 | struct list_head pending_mid_q; | |
150 | void *Server_NlsInfo; /* BB - placeholder for future NLS info */ | |
151 | unsigned short server_codepage; /* codepage for the server */ | |
152 | unsigned long ip_address; /* IP addr for the server if known */ | |
153 | enum protocolEnum protocolType; | |
154 | char versionMajor; | |
155 | char versionMinor; | |
156 | unsigned svlocal:1; /* local server or remote */ | |
157 | atomic_t socketUseCount; /* number of open cifs sessions on socket */ | |
158 | atomic_t inFlight; /* number of requests on the wire to server */ | |
159 | #ifdef CONFIG_CIFS_STATS2 | |
160 | atomic_t inSend; /* requests trying to send */ | |
161 | atomic_t num_waiters; /* blocked waiting to get in sendrecv */ | |
162 | #endif | |
163 | enum statusEnum tcpStatus; /* what we think the status is */ | |
164 | struct semaphore tcpSem; | |
165 | struct task_struct *tsk; | |
166 | char server_GUID[16]; | |
167 | char secMode; | |
168 | enum securityEnum secType; | |
169 | unsigned int maxReq; /* Clients should submit no more */ | |
170 | /* than maxReq distinct unanswered SMBs to the server when using */ | |
171 | /* multiplexed reads or writes */ | |
172 | unsigned int maxBuf; /* maxBuf specifies the maximum */ | |
173 | /* message size the server can send or receive for non-raw SMBs */ | |
174 | unsigned int maxRw; /* maxRw specifies the maximum */ | |
175 | /* message size the server can send or receive for */ | |
176 | /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */ | |
177 | char sessid[4]; /* unique token id for this session */ | |
178 | /* (returned on Negotiate */ | |
179 | int capabilities; /* allow selective disabling of caps by smb sess */ | |
180 | int timeAdj; /* Adjust for difference in server time zone in sec */ | |
181 | __u16 CurrentMid; /* multiplex id - rotating counter */ | |
182 | char cryptKey[CIFS_CRYPTO_KEY_SIZE]; | |
183 | /* 16th byte of RFC1001 workstation name is always null */ | |
184 | char workstation_RFC1001_name[SERVER_NAME_LEN_WITH_NULL]; | |
185 | __u32 sequence_number; /* needed for CIFS PDU signature */ | |
186 | struct mac_key mac_signing_key; | |
187 | char ntlmv2_hash[16]; | |
188 | unsigned long lstrp; /* when we got last response from this server */ | |
189 | }; | |
190 | ||
191 | /* | |
192 | * The following is our shortcut to user information. We surface the uid, | |
193 | * and name. We always get the password on the fly in case it | |
194 | * has changed. We also hang a list of sessions owned by this user off here. | |
195 | */ | |
196 | struct cifsUidInfo { | |
197 | struct list_head userList; | |
198 | struct list_head sessionList; /* SMB sessions for this user */ | |
199 | uid_t linux_uid; | |
200 | char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */ | |
201 | /* BB may need ptr or callback for PAM or WinBind info */ | |
202 | }; | |
203 | ||
204 | /* | |
205 | * Session structure. One of these for each uid session with a particular host | |
206 | */ | |
207 | struct cifsSesInfo { | |
208 | struct list_head cifsSessionList; | |
209 | struct semaphore sesSem; | |
210 | #if 0 | |
211 | struct cifsUidInfo *uidInfo; /* pointer to user info */ | |
212 | #endif | |
213 | struct TCP_Server_Info *server; /* pointer to server info */ | |
214 | atomic_t inUse; /* # of mounts (tree connections) on this ses */ | |
215 | enum statusEnum status; | |
216 | unsigned overrideSecFlg; /* if non-zero override global sec flags */ | |
217 | __u16 ipc_tid; /* special tid for connection to IPC share */ | |
218 | __u16 flags; | |
219 | char *serverOS; /* name of operating system underlying server */ | |
220 | char *serverNOS; /* name of network operating system of server */ | |
221 | char *serverDomain; /* security realm of server */ | |
222 | int Suid; /* remote smb uid */ | |
223 | uid_t linux_uid; /* local Linux uid */ | |
224 | int capabilities; | |
225 | char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for | |
226 | TCP names - will ipv6 and sctp addresses fit? */ | |
227 | char userName[MAX_USERNAME_SIZE + 1]; | |
228 | char *domainName; | |
229 | char *password; | |
230 | }; | |
231 | /* no more than one of the following three session flags may be set */ | |
232 | #define CIFS_SES_NT4 1 | |
233 | #define CIFS_SES_OS2 2 | |
234 | #define CIFS_SES_W9X 4 | |
235 | /* following flag is set for old servers such as OS2 (and Win95?) | |
236 | which do not negotiate NTLM or POSIX dialects, but instead | |
237 | negotiate one of the older LANMAN dialects */ | |
238 | #define CIFS_SES_LANMAN 8 | |
239 | /* | |
240 | * there is one of these for each connection to a resource on a particular | |
241 | * session | |
242 | */ | |
243 | struct cifsTconInfo { | |
244 | struct list_head cifsConnectionList; | |
245 | struct list_head openFileList; | |
246 | struct semaphore tconSem; | |
247 | struct cifsSesInfo *ses; /* pointer to session associated with */ | |
248 | char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */ | |
249 | char *nativeFileSystem; | |
250 | __u16 tid; /* The 2 byte tree id */ | |
251 | __u16 Flags; /* optional support bits */ | |
252 | enum statusEnum tidStatus; | |
253 | atomic_t useCount; /* how many explicit/implicit mounts to share */ | |
254 | #ifdef CONFIG_CIFS_STATS | |
255 | atomic_t num_smbs_sent; | |
256 | atomic_t num_writes; | |
257 | atomic_t num_reads; | |
258 | atomic_t num_oplock_brks; | |
259 | atomic_t num_opens; | |
260 | atomic_t num_closes; | |
261 | atomic_t num_deletes; | |
262 | atomic_t num_mkdirs; | |
263 | atomic_t num_rmdirs; | |
264 | atomic_t num_renames; | |
265 | atomic_t num_t2renames; | |
266 | atomic_t num_ffirst; | |
267 | atomic_t num_fnext; | |
268 | atomic_t num_fclose; | |
269 | atomic_t num_hardlinks; | |
270 | atomic_t num_symlinks; | |
271 | atomic_t num_locks; | |
272 | atomic_t num_acl_get; | |
273 | atomic_t num_acl_set; | |
274 | #ifdef CONFIG_CIFS_STATS2 | |
275 | unsigned long long time_writes; | |
276 | unsigned long long time_reads; | |
277 | unsigned long long time_opens; | |
278 | unsigned long long time_deletes; | |
279 | unsigned long long time_closes; | |
280 | unsigned long long time_mkdirs; | |
281 | unsigned long long time_rmdirs; | |
282 | unsigned long long time_renames; | |
283 | unsigned long long time_t2renames; | |
284 | unsigned long long time_ffirst; | |
285 | unsigned long long time_fnext; | |
286 | unsigned long long time_fclose; | |
287 | #endif /* CONFIG_CIFS_STATS2 */ | |
288 | __u64 bytes_read; | |
289 | __u64 bytes_written; | |
290 | spinlock_t stat_lock; | |
291 | #endif /* CONFIG_CIFS_STATS */ | |
292 | FILE_SYSTEM_DEVICE_INFO fsDevInfo; | |
293 | FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */ | |
294 | FILE_SYSTEM_UNIX_INFO fsUnixInfo; | |
295 | unsigned ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */ | |
296 | unsigned retry:1; | |
297 | unsigned nocase:1; | |
298 | unsigned unix_ext:1; /* if off disable Linux extensions to CIFS protocol | |
299 | for this mount even if server would support */ | |
300 | /* BB add field for back pointer to sb struct(s)? */ | |
301 | }; | |
302 | ||
303 | /* | |
304 | * This info hangs off the cifsFileInfo structure, pointed to by llist. | |
305 | * This is used to track byte stream locks on the file | |
306 | */ | |
307 | struct cifsLockInfo { | |
308 | struct list_head llist; /* pointer to next cifsLockInfo */ | |
309 | __u64 offset; | |
310 | __u64 length; | |
311 | __u8 type; | |
312 | }; | |
313 | ||
314 | /* | |
315 | * One of these for each open instance of a file | |
316 | */ | |
317 | struct cifs_search_info { | |
318 | loff_t index_of_last_entry; | |
319 | __u16 entries_in_buffer; | |
320 | __u16 info_level; | |
321 | __u32 resume_key; | |
322 | char *ntwrk_buf_start; | |
323 | char *srch_entries_start; | |
324 | char *presume_name; | |
325 | unsigned int resume_name_len; | |
326 | unsigned endOfSearch:1; | |
327 | unsigned emptyDir:1; | |
328 | unsigned unicode:1; | |
329 | unsigned smallBuf:1; /* so we know which buf_release function to call */ | |
330 | }; | |
331 | ||
332 | struct cifsFileInfo { | |
333 | struct list_head tlist; /* pointer to next fid owned by tcon */ | |
334 | struct list_head flist; /* next fid (file instance) for this inode */ | |
335 | unsigned int uid; /* allows finding which FileInfo structure */ | |
336 | __u32 pid; /* process id who opened file */ | |
337 | __u16 netfid; /* file id from remote */ | |
338 | /* BB add lock scope info here if needed */ ; | |
339 | /* lock scope id (0 if none) */ | |
340 | struct file *pfile; /* needed for writepage */ | |
341 | struct inode *pInode; /* needed for oplock break */ | |
342 | struct mutex lock_mutex; | |
343 | struct list_head llist; /* list of byte range locks we have. */ | |
344 | unsigned closePend:1; /* file is marked to close */ | |
345 | unsigned invalidHandle:1; /* file closed via session abend */ | |
346 | unsigned messageMode:1; /* for pipes: message vs byte mode */ | |
347 | atomic_t wrtPending; /* handle in use - defer close */ | |
348 | struct semaphore fh_sem; /* prevents reopen race after dead ses*/ | |
349 | char *search_resume_name; /* BB removeme BB */ | |
350 | struct cifs_search_info srch_inf; | |
351 | }; | |
352 | ||
353 | /* | |
354 | * One of these for each file inode | |
355 | */ | |
356 | ||
357 | struct cifsInodeInfo { | |
358 | struct list_head lockList; | |
359 | /* BB add in lists for dirty pages i.e. write caching info for oplock */ | |
360 | struct list_head openFileList; | |
361 | int write_behind_rc; | |
362 | __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ | |
363 | atomic_t inUse; /* num concurrent users (local openers cifs) of file*/ | |
364 | unsigned long time; /* jiffies of last update/check of inode */ | |
365 | unsigned clientCanCacheRead:1; /* read oplock */ | |
366 | unsigned clientCanCacheAll:1; /* read and writebehind oplock */ | |
367 | unsigned oplockPending:1; | |
368 | struct inode vfs_inode; | |
369 | }; | |
370 | ||
371 | static inline struct cifsInodeInfo * | |
372 | CIFS_I(struct inode *inode) | |
373 | { | |
374 | return container_of(inode, struct cifsInodeInfo, vfs_inode); | |
375 | } | |
376 | ||
377 | static inline struct cifs_sb_info * | |
378 | CIFS_SB(struct super_block *sb) | |
379 | { | |
380 | return sb->s_fs_info; | |
381 | } | |
382 | ||
383 | static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb) | |
384 | { | |
385 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) | |
386 | return '/'; | |
387 | else | |
388 | return '\\'; | |
389 | } | |
390 | ||
391 | #ifdef CONFIG_CIFS_STATS | |
392 | #define cifs_stats_inc atomic_inc | |
393 | ||
394 | static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon, | |
395 | unsigned int bytes) | |
396 | { | |
397 | if (bytes) { | |
398 | spin_lock(&tcon->stat_lock); | |
399 | tcon->bytes_written += bytes; | |
400 | spin_unlock(&tcon->stat_lock); | |
401 | } | |
402 | } | |
403 | ||
404 | static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon, | |
405 | unsigned int bytes) | |
406 | { | |
407 | spin_lock(&tcon->stat_lock); | |
408 | tcon->bytes_read += bytes; | |
409 | spin_unlock(&tcon->stat_lock); | |
410 | } | |
411 | #else | |
412 | ||
413 | #define cifs_stats_inc(field) do {} while (0) | |
414 | #define cifs_stats_bytes_written(tcon, bytes) do {} while (0) | |
415 | #define cifs_stats_bytes_read(tcon, bytes) do {} while (0) | |
416 | ||
417 | #endif | |
418 | ||
419 | /* one of these for every pending CIFS request to the server */ | |
420 | struct mid_q_entry { | |
421 | struct list_head qhead; /* mids waiting on reply from this server */ | |
422 | __u16 mid; /* multiplex id */ | |
423 | __u16 pid; /* process id */ | |
424 | __u32 sequence_number; /* for CIFS signing */ | |
425 | unsigned long when_alloc; /* when mid was created */ | |
426 | #ifdef CONFIG_CIFS_STATS2 | |
427 | unsigned long when_sent; /* time when smb send finished */ | |
428 | unsigned long when_received; /* when demux complete (taken off wire) */ | |
429 | #endif | |
430 | struct cifsSesInfo *ses; /* smb was sent to this server */ | |
431 | struct task_struct *tsk; /* task waiting for response */ | |
432 | struct smb_hdr *resp_buf; /* response buffer */ | |
433 | int midState; /* wish this were enum but can not pass to wait_event */ | |
434 | __u8 command; /* smb command code */ | |
435 | unsigned largeBuf:1; /* if valid response, is pointer to large buf */ | |
436 | unsigned multiRsp:1; /* multiple trans2 responses for one request */ | |
437 | unsigned multiEnd:1; /* both received */ | |
438 | }; | |
439 | ||
440 | struct oplock_q_entry { | |
441 | struct list_head qhead; | |
442 | struct inode *pinode; | |
443 | struct cifsTconInfo *tcon; | |
444 | __u16 netfid; | |
445 | }; | |
446 | ||
447 | /* for pending dnotify requests */ | |
448 | struct dir_notify_req { | |
449 | struct list_head lhead; | |
450 | __le16 Pid; | |
451 | __le16 PidHigh; | |
452 | __u16 Mid; | |
453 | __u16 Tid; | |
454 | __u16 Uid; | |
455 | __u16 netfid; | |
456 | __u32 filter; /* CompletionFilter (for multishot) */ | |
457 | int multishot; | |
458 | struct file *pfile; | |
459 | }; | |
460 | ||
461 | #define MID_FREE 0 | |
462 | #define MID_REQUEST_ALLOCATED 1 | |
463 | #define MID_REQUEST_SUBMITTED 2 | |
464 | #define MID_RESPONSE_RECEIVED 4 | |
465 | #define MID_RETRY_NEEDED 8 /* session closed while this request out */ | |
466 | #define MID_NO_RESP_NEEDED 0x10 | |
467 | ||
468 | /* Types of response buffer returned from SendReceive2 */ | |
469 | #define CIFS_NO_BUFFER 0 /* Response buffer not returned */ | |
470 | #define CIFS_SMALL_BUFFER 1 | |
471 | #define CIFS_LARGE_BUFFER 2 | |
472 | #define CIFS_IOVEC 4 /* array of response buffers */ | |
473 | ||
474 | /* Security Flags: indicate type of session setup needed */ | |
475 | #define CIFSSEC_MAY_SIGN 0x00001 | |
476 | #define CIFSSEC_MAY_NTLM 0x00002 | |
477 | #define CIFSSEC_MAY_NTLMV2 0x00004 | |
478 | #define CIFSSEC_MAY_KRB5 0x00008 | |
479 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
480 | #define CIFSSEC_MAY_LANMAN 0x00010 | |
481 | #define CIFSSEC_MAY_PLNTXT 0x00020 | |
482 | #endif /* weak passwords */ | |
483 | #define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */ | |
484 | ||
485 | #define CIFSSEC_MUST_SIGN 0x01001 | |
486 | /* note that only one of the following can be set so the | |
487 | result of setting MUST flags more than once will be to | |
488 | require use of the stronger protocol */ | |
489 | #define CIFSSEC_MUST_NTLM 0x02002 | |
490 | #define CIFSSEC_MUST_NTLMV2 0x04004 | |
491 | #define CIFSSEC_MUST_KRB5 0x08008 | |
492 | #ifdef CONFIG_CIFS_WEAK_PW_HASH | |
493 | #define CIFSSEC_MUST_LANMAN 0x10010 | |
494 | #define CIFSSEC_MUST_PLNTXT 0x20020 | |
495 | #define CIFSSEC_MASK 0x37037 /* current flags supported if weak */ | |
496 | #else | |
497 | #define CIFSSEC_MASK 0x07007 /* flags supported if no weak config */ | |
498 | #endif /* WEAK_PW_HASH */ | |
499 | #define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */ | |
500 | ||
501 | #define CIFSSEC_DEF CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | |
502 | #define CIFSSEC_MAX CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2 | |
503 | #define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5) | |
504 | /* | |
505 | ***************************************************************** | |
506 | * All constants go here | |
507 | ***************************************************************** | |
508 | */ | |
509 | ||
510 | #define UID_HASH (16) | |
511 | ||
512 | /* | |
513 | * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the | |
514 | * following to be declared. | |
515 | */ | |
516 | ||
517 | /**************************************************************************** | |
518 | * Locking notes. All updates to global variables and lists should be | |
519 | * protected by spinlocks or semaphores. | |
520 | * | |
521 | * Spinlocks | |
522 | * --------- | |
523 | * GlobalMid_Lock protects: | |
524 | * list operations on pending_mid_q and oplockQ | |
525 | * updates to XID counters, multiplex id and SMB sequence numbers | |
526 | * GlobalSMBSesLock protects: | |
527 | * list operations on tcp and SMB session lists and tCon lists | |
528 | * f_owner.lock protects certain per file struct operations | |
529 | * mapping->page_lock protects certain per page operations | |
530 | * | |
531 | * Semaphores | |
532 | * ---------- | |
533 | * sesSem operations on smb session | |
534 | * tconSem operations on tree connection | |
535 | * fh_sem file handle reconnection operations | |
536 | * | |
537 | ****************************************************************************/ | |
538 | ||
539 | #ifdef DECLARE_GLOBALS_HERE | |
540 | #define GLOBAL_EXTERN | |
541 | #else | |
542 | #define GLOBAL_EXTERN extern | |
543 | #endif | |
544 | ||
545 | /* | |
546 | * The list of servers that did not respond with NT LM 0.12. | |
547 | * This list helps improve performance and eliminate the messages indicating | |
548 | * that we had a communications error talking to the server in this list. | |
549 | */ | |
550 | /* Feature not supported */ | |
551 | /* GLOBAL_EXTERN struct servers_not_supported *NotSuppList; */ | |
552 | ||
553 | /* | |
554 | * The following is a hash table of all the users we know about. | |
555 | */ | |
556 | GLOBAL_EXTERN struct smbUidInfo *GlobalUidList[UID_HASH]; | |
557 | ||
558 | /* GLOBAL_EXTERN struct list_head GlobalServerList; BB not implemented yet */ | |
559 | GLOBAL_EXTERN struct list_head GlobalSMBSessionList; | |
560 | GLOBAL_EXTERN struct list_head GlobalTreeConnectionList; | |
561 | GLOBAL_EXTERN rwlock_t GlobalSMBSeslock; /* protects list inserts on 3 above */ | |
562 | ||
563 | GLOBAL_EXTERN struct list_head GlobalOplock_Q; | |
564 | ||
565 | /* Outstanding dir notify requests */ | |
566 | GLOBAL_EXTERN struct list_head GlobalDnotifyReqList; | |
567 | /* DirNotify response queue */ | |
568 | GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q; | |
569 | ||
570 | /* | |
571 | * Global transaction id (XID) information | |
572 | */ | |
573 | GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ | |
574 | GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ | |
575 | GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ | |
576 | GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */ | |
577 | /* on midQ entries */ | |
578 | GLOBAL_EXTERN char Local_System_Name[15]; | |
579 | ||
580 | /* | |
581 | * Global counters, updated atomically | |
582 | */ | |
583 | GLOBAL_EXTERN atomic_t sesInfoAllocCount; | |
584 | GLOBAL_EXTERN atomic_t tconInfoAllocCount; | |
585 | GLOBAL_EXTERN atomic_t tcpSesAllocCount; | |
586 | GLOBAL_EXTERN atomic_t tcpSesReconnectCount; | |
587 | GLOBAL_EXTERN atomic_t tconInfoReconnectCount; | |
588 | ||
589 | /* Various Debug counters to remove someday (BB) */ | |
590 | GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */ | |
591 | #ifdef CONFIG_CIFS_STATS2 | |
592 | GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */ | |
593 | GLOBAL_EXTERN atomic_t totSmBufAllocCount; | |
594 | #endif | |
595 | GLOBAL_EXTERN atomic_t smBufAllocCount; | |
596 | GLOBAL_EXTERN atomic_t midCount; | |
597 | ||
598 | /* Misc globals */ | |
599 | GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions | |
600 | to be established on existing mount if we | |
601 | have the uid/password or Kerberos credential | |
602 | or equivalent for current user */ | |
603 | GLOBAL_EXTERN unsigned int oplockEnabled; | |
604 | GLOBAL_EXTERN unsigned int experimEnabled; | |
605 | GLOBAL_EXTERN unsigned int lookupCacheEnabled; | |
606 | GLOBAL_EXTERN unsigned int extended_security; /* if on, session setup sent | |
607 | with more secure ntlmssp2 challenge/resp */ | |
608 | GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */ | |
609 | GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/ | |
610 | GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */ | |
611 | GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */ | |
612 | GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */ | |
613 | GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/ | |
614 |