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[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / cifs / cifsglob.h
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1da177e4
LT		 1/*
2 * fs/cifs/cifsglob.h
3 *
366781c1 4 * Copyright (C) International Business Machines Corp., 2002,2008
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.
d38d8c74 17 *
1da177e4
LT		 18 */
19#include <linux/in.h>
20#include <linux/in6.h>
5a0e3ad6 21#include <linux/slab.h>
3bc303c2 22#include <linux/slow-work.h>
1da177e4 23#include "cifs_fs_sb.h"
442aa310 24#include "cifsacl.h"
1da177e4
LT		 25/*
26 * The sizes of various internal tables and strings
27 */
28#define MAX_UID_INFO 16
29#define MAX_SES_INFO 2
30#define MAX_TCON_INFO 4
31
ef571cad 32#define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
1da177e4 33#define MAX_SERVER_SIZE 15
d38d8c74 34#define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */
1da177e4
LT		 35#define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
36 termination then *2 for unicode versions */
37#define MAX_PASSWORD_SIZE 16
38
39#define CIFS_MIN_RCV_POOL 4
40
41/*
42 * MAX_REQ is the maximum number of requests that WE will send
af901ca1 43 * on one socket concurrently. It also matches the most common
d38d8c74 44 * value of max multiplex returned by servers. We may
1da177e4
LT		 45 * eventually want to use the negotiated value (in case
46 * future servers can handle more) when we are more confident that
47 * we will not have problems oveloading the socket with pending
48 * write data.
49 */
d38d8c74 50#define CIFS_MAX_REQ 50
1da177e4 51
8ecaf67a
JL		 52#define RFC1001_NAME_LEN 15
53#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
54
55/* currently length of NIP6_FMT */
56#define SERVER_NAME_LENGTH 40
1da177e4
LT		 57#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
58
59/* used to define string lengths for reversing unicode strings */
60/* (256+1)*2 = 514 */
61/* (max path length + 1 for null) * 2 for unicode */
62#define MAX_NAME 514
63
64#include "cifspdu.h"
65
1da177e4
LT		 66#ifndef XATTR_DOS_ATTRIB
67#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
68#endif
69
1da177e4
LT		 70/*
71 * CIFS vfs client Status information (based on what we know.)
72 */
73
74 /* associated with each tcp and smb session */
75enum statusEnum {
76 CifsNew = 0,
77 CifsGood,
78 CifsExiting,
79 CifsNeedReconnect
80};
81
82enum securityEnum {
a013689d
SF		 83 PLAINTXT = 0, /* Legacy with Plaintext passwords */
84 LANMAN, /* Legacy LANMAN auth */
3979877e 85 NTLM, /* Legacy NTLM012 auth with NTLM hash */
1da177e4 86 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
ac683924 87 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
f46c7234 88/* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
c16fefa5
SF		 89 Kerberos, /* Kerberos via SPNEGO */
90 MSKerberos, /* MS Kerberos via SPNEGO */
1da177e4
LT		 91};
92
93enum protocolEnum {
3ec332ef 94 TCP = 0,
1da177e4
LT		 95 SCTP
96 /* Netbios frames protocol not supported at this time */
97};
98
b609f06a
SF		 99struct mac_key {
100 unsigned int len;
101 union {
102 char ntlm[CIFS_SESS_KEY_SIZE + 16];
2442421b 103 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
b609f06a
SF		 104 struct {
105 char key[16];
106 struct ntlmv2_resp resp;
107 } ntlmv2;
108 } data;
109};
110
442aa310
SF		 111struct cifs_cred {
112 int uid;
113 int gid;
114 int mode;
115 int cecount;
116 struct cifs_sid osid;
117 struct cifs_sid gsid;
118 struct cifs_ntace *ntaces;
119 struct cifs_ace *aces;
120};
121
1da177e4
LT		 122/*
123 *****************************************************************
124 * Except the CIFS PDUs themselves all the
125 * globally interesting structs should go here
126 *****************************************************************
127 */
128
129struct TCP_Server_Info {
3b795210
SF		 130 struct list_head tcp_ses_list;
131 struct list_head smb_ses_list;
e7ddee90 132 int srv_count; /* reference counter */
a10faeb2 133 /* 15 character server name + 0x20 16th byte indicating type = srv */
8ecaf67a 134 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
c359cf3c 135 char *hostname; /* hostname portion of UNC string */
1da177e4
LT		 136 struct socket *ssocket;
137 union {
138 struct sockaddr_in sockAddr;
139 struct sockaddr_in6 sockAddr6;
140 } addr;
d38d8c74 141 wait_queue_head_t response_q;
1da177e4
LT		 142 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
143 struct list_head pending_mid_q;
144 void *Server_NlsInfo; /* BB - placeholder for future NLS info */
145 unsigned short server_codepage; /* codepage for the server */
131afd0b 146 unsigned long ip_address; /* IP addr for the server if known */
d38d8c74 147 enum protocolEnum protocolType;
1da177e4
LT		 148 char versionMajor;
149 char versionMinor;
4b18f2a9 150 bool svlocal:1; /* local server or remote */
edf1ae40
SF		 151 bool noblocksnd; /* use blocking sendmsg */
152 bool noautotune; /* do not autotune send buf sizes */
6a5fa236 153 bool tcp_nodelay;
1da177e4 154 atomic_t inFlight; /* number of requests on the wire to server */
131afd0b
SF		 155#ifdef CONFIG_CIFS_STATS2
156 atomic_t inSend; /* requests trying to send */
157 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
158#endif
1da177e4 159 enum statusEnum tcpStatus; /* what we think the status is */
72ca545b 160 struct mutex srv_mutex;
1da177e4
LT		 161 struct task_struct *tsk;
162 char server_GUID[16];
163 char secMode;
164 enum securityEnum secType;
165 unsigned int maxReq; /* Clients should submit no more */
166 /* than maxReq distinct unanswered SMBs to the server when using */
167 /* multiplexed reads or writes */
168 unsigned int maxBuf; /* maxBuf specifies the maximum */
169 /* message size the server can send or receive for non-raw SMBs */
eca6acf9 170 unsigned int max_rw; /* maxRw specifies the maximum */
1da177e4
LT		 171 /* message size the server can send or receive for */
172 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
eca6acf9
SF		 173 unsigned int max_vcs; /* maximum number of smb sessions, at least
174 those that can be specified uniquely with
175 vcnumbers */
1da177e4
LT		 176 char sessid[4]; /* unique token id for this session */
177 /* (returned on Negotiate */
178 int capabilities; /* allow selective disabling of caps by smb sess */
de7ed55d 179 int timeAdj; /* Adjust for difference in server time zone in sec */
1982c344 180 __u16 CurrentMid; /* multiplex id - rotating counter */
1da177e4 181 char cryptKey[CIFS_CRYPTO_KEY_SIZE];
a10faeb2 182 /* 16th byte of RFC1001 workstation name is always null */
8ecaf67a 183 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
ad009ac9 184 __u32 sequence_number; /* needed for CIFS PDU signature */
b609f06a
SF		 185 struct mac_key mac_signing_key;
186 char ntlmv2_hash[16];
3a5ff61c 187 unsigned long lstrp; /* when we got last response from this server */
1da177e4
LT		 188};
189
190/*
191 * The following is our shortcut to user information. We surface the uid,
192 * and name. We always get the password on the fly in case it
d38d8c74 193 * has changed. We also hang a list of sessions owned by this user off here.
1da177e4
LT		 194 */
195struct cifsUidInfo {
196 struct list_head userList;
197 struct list_head sessionList; /* SMB sessions for this user */
198 uid_t linux_uid;
199 char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */
200 /* BB may need ptr or callback for PAM or WinBind info */
201};
202
203/*
204 * Session structure. One of these for each uid session with a particular host
205 */
206struct cifsSesInfo {
14fbf50d 207 struct list_head smb_ses_list;
3b795210 208 struct list_head tcon_list;
d7b619cf 209 struct mutex session_mutex;
3979877e 210#if 0
1da177e4 211 struct cifsUidInfo *uidInfo; /* pointer to user info */
3979877e 212#endif
1da177e4 213 struct TCP_Server_Info *server; /* pointer to server info */
14fbf50d 214 int ses_count; /* reference counter */
1da177e4 215 enum statusEnum status;
750d1151 216 unsigned overrideSecFlg; /* if non-zero override global sec flags */
1da177e4
LT		 217 __u16 ipc_tid; /* special tid for connection to IPC share */
218 __u16 flags;
eca6acf9 219 __u16 vcnum;
ad009ac9
SF		 220 char *serverOS; /* name of operating system underlying server */
221 char *serverNOS; /* name of network operating system of server */
1da177e4
LT		 222 char *serverDomain; /* security realm of server */
223 int Suid; /* remote smb uid */
224 uid_t linux_uid; /* local Linux uid */
225 int capabilities;
d38d8c74 226 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
ad009ac9 227 TCP names - will ipv6 and sctp addresses fit? */
1da177e4 228 char userName[MAX_USERNAME_SIZE + 1];
d38d8c74
SF		 229 char *domainName;
230 char *password;
3b795210 231 bool need_reconnect:1; /* connection reset, uid now invalid */
1da177e4 232};
9ac00b7d 233/* no more than one of the following three session flags may be set */
1da177e4 234#define CIFS_SES_NT4 1
9ac00b7d
SF		 235#define CIFS_SES_OS2 2
236#define CIFS_SES_W9X 4
237/* following flag is set for old servers such as OS2 (and Win95?)
238 which do not negotiate NTLM or POSIX dialects, but instead
239 negotiate one of the older LANMAN dialects */
240#define CIFS_SES_LANMAN 8
1da177e4
LT		 241/*
242 * there is one of these for each connection to a resource on a particular
d38d8c74 243 * session
1da177e4
LT		 244 */
245struct cifsTconInfo {
f1987b44
JL		 246 struct list_head tcon_list;
247 int tc_count;
1da177e4 248 struct list_head openFileList;
1da177e4 249 struct cifsSesInfo *ses; /* pointer to session associated with */
254e55ed 250 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
1da177e4 251 char *nativeFileSystem;
00e485b0 252 char *password; /* for share-level security */
1da177e4
LT		 253 __u16 tid; /* The 2 byte tree id */
254 __u16 Flags; /* optional support bits */
255 enum statusEnum tidStatus;
1da177e4
LT		 256#ifdef CONFIG_CIFS_STATS
257 atomic_t num_smbs_sent;
258 atomic_t num_writes;
259 atomic_t num_reads;
b298f223 260 atomic_t num_flushes;
1da177e4
LT		 261 atomic_t num_oplock_brks;
262 atomic_t num_opens;
a5a2b489 263 atomic_t num_closes;
1da177e4
LT		 264 atomic_t num_deletes;
265 atomic_t num_mkdirs;
65bc98b0
SF		 266 atomic_t num_posixopens;
267 atomic_t num_posixmkdirs;
1da177e4
LT		 268 atomic_t num_rmdirs;
269 atomic_t num_renames;
270 atomic_t num_t2renames;
dfb7533b
SF		 271 atomic_t num_ffirst;
272 atomic_t num_fnext;
273 atomic_t num_fclose;
a5a2b489
SF		 274 atomic_t num_hardlinks;
275 atomic_t num_symlinks;
276 atomic_t num_locks;
0a4b92c0
SF		 277 atomic_t num_acl_get;
278 atomic_t num_acl_set;
a5a2b489
SF		 279#ifdef CONFIG_CIFS_STATS2
280 unsigned long long time_writes;
281 unsigned long long time_reads;
282 unsigned long long time_opens;
283 unsigned long long time_deletes;
284 unsigned long long time_closes;
285 unsigned long long time_mkdirs;
286 unsigned long long time_rmdirs;
287 unsigned long long time_renames;
288 unsigned long long time_t2renames;
289 unsigned long long time_ffirst;
290 unsigned long long time_fnext;
291 unsigned long long time_fclose;
292#endif /* CONFIG_CIFS_STATS2 */
1da177e4
LT		 293 __u64 bytes_read;
294 __u64 bytes_written;
295 spinlock_t stat_lock;
a5a2b489 296#endif /* CONFIG_CIFS_STATS */
1da177e4 297 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
254e55ed 298 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
1da177e4 299 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
4b18f2a9
SF		 300 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
301 bool retry:1;
302 bool nocase:1;
95b1cb90 303 bool seal:1; /* transport encryption for this mounted share */
4b18f2a9 304 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
c18c842b 305 for this mount even if server would support */
84210e91 306 bool local_lease:1; /* check leases (only) on local system not remote */
64cc2c63 307 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
3b795210 308 bool need_reconnect:1; /* connection reset, tid now invalid */
c18c842b 309 /* BB add field for back pointer to sb struct(s)? */
1da177e4
LT		 310};
311
312/*
7ee1af76
JA		 313 * This info hangs off the cifsFileInfo structure, pointed to by llist.
314 * This is used to track byte stream locks on the file
1da177e4
LT		 315 */
316struct cifsLockInfo {
7ee1af76
JA		 317 struct list_head llist; /* pointer to next cifsLockInfo */
318 __u64 offset;
319 __u64 length;
320 __u8 type;
1da177e4
LT		 321};
322
323/*
324 * One of these for each open instance of a file
325 */
326struct cifs_search_info {
327 loff_t index_of_last_entry;
328 __u16 entries_in_buffer;
329 __u16 info_level;
330 __u32 resume_key;
d38d8c74
SF		 331 char *ntwrk_buf_start;
332 char *srch_entries_start;
0752f152 333 char *last_entry;
d38d8c74 334 char *presume_name;
1da177e4 335 unsigned int resume_name_len;
4b18f2a9
SF		 336 bool endOfSearch:1;
337 bool emptyDir:1;
338 bool unicode:1;
339 bool smallBuf:1; /* so we know which buf_release function to call */
1da177e4
LT		 340};
341
342struct cifsFileInfo {
343 struct list_head tlist; /* pointer to next fid owned by tcon */
344 struct list_head flist; /* next fid (file instance) for this inode */
345 unsigned int uid; /* allows finding which FileInfo structure */
346 __u32 pid; /* process id who opened file */
347 __u16 netfid; /* file id from remote */
348 /* BB add lock scope info here if needed */ ;
349 /* lock scope id (0 if none) */
d38d8c74
SF		 350 struct file *pfile; /* needed for writepage */
351 struct inode *pInode; /* needed for oplock break */
3bc303c2 352 struct vfsmount *mnt;
796e5661 353 struct mutex lock_mutex;
7ee1af76 354 struct list_head llist; /* list of byte range locks we have. */
4b18f2a9
SF		 355 bool closePend:1; /* file is marked to close */
356 bool invalidHandle:1; /* file closed via session abend */
3bc303c2 357 bool oplock_break_cancelled:1;
6ab409b5 358 atomic_t count; /* reference count */
a6ce4932 359 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
1da177e4 360 struct cifs_search_info srch_inf;
3bc303c2 361 struct slow_work oplock_break; /* slow_work job for oplock breaks */
1da177e4
LT		 362};
363
6ab409b5
DK		 364/* Take a reference on the file private data */
365static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
366{
367 atomic_inc(&cifs_file->count);
368}
369
370/* Release a reference on the file private data */
371static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
372{
48541bd3
JL		 373 if (atomic_dec_and_test(&cifs_file->count)) {
374 iput(cifs_file->pInode);
6ab409b5 375 kfree(cifs_file);
48541bd3 376 }
6ab409b5
DK		 377}
378
1da177e4
LT		 379/*
380 * One of these for each file inode
381 */
382
383struct cifsInodeInfo {
384 struct list_head lockList;
d38d8c74 385 /* BB add in lists for dirty pages i.e. write caching info for oplock */
1da177e4
LT		 386 struct list_head openFileList;
387 int write_behind_rc;
388 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
1da177e4 389 unsigned long time; /* jiffies of last update/check of inode */
4b18f2a9
SF		 390 bool clientCanCacheRead:1; /* read oplock */
391 bool clientCanCacheAll:1; /* read and writebehind oplock */
9a8165fc 392 bool delete_pending:1; /* DELETE_ON_CLOSE is set */
df2cf170 393 bool invalid_mapping:1; /* pagecache is invalid */
fbec9ab9 394 u64 server_eof; /* current file size on server */
cc0bad75 395 u64 uniqueid; /* server inode number */
1da177e4
LT		 396 struct inode vfs_inode;
397};
398
399static inline struct cifsInodeInfo *
400CIFS_I(struct inode *inode)
401{
402 return container_of(inode, struct cifsInodeInfo, vfs_inode);
403}
404
405static inline struct cifs_sb_info *
406CIFS_SB(struct super_block *sb)
407{
408 return sb->s_fs_info;
409}
410
ab2f218f 411static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
ac67055e
JA		 412{
413 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
414 return '/';
415 else
416 return '\\';
417}
1da177e4 418
a4544347
SF		 419#ifdef CONFIG_CIFS_STATS
420#define cifs_stats_inc atomic_inc
421
422static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
423 unsigned int bytes)
424{
425 if (bytes) {
426 spin_lock(&tcon->stat_lock);
427 tcon->bytes_written += bytes;
428 spin_unlock(&tcon->stat_lock);
429 }
430}
431
432static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
433 unsigned int bytes)
434{
435 spin_lock(&tcon->stat_lock);
436 tcon->bytes_read += bytes;
437 spin_unlock(&tcon->stat_lock);
438}
439#else
440
d38d8c74
SF		 441#define cifs_stats_inc(field) do {} while (0)
442#define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
443#define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
a4544347
SF		 444
445#endif
446
1da177e4
LT		 447/* one of these for every pending CIFS request to the server */
448struct mid_q_entry {
449 struct list_head qhead; /* mids waiting on reply from this server */
450 __u16 mid; /* multiplex id */
451 __u16 pid; /* process id */
452 __u32 sequence_number; /* for CIFS signing */
1047abc1
SF		 453 unsigned long when_alloc; /* when mid was created */
454#ifdef CONFIG_CIFS_STATS2
455 unsigned long when_sent; /* time when smb send finished */
456 unsigned long when_received; /* when demux complete (taken off wire) */
457#endif
1da177e4
LT		 458 struct task_struct *tsk; /* task waiting for response */
459 struct smb_hdr *resp_buf; /* response buffer */
460 int midState; /* wish this were enum but can not pass to wait_event */
c81156dd 461 __u8 command; /* smb command code */
4b18f2a9
SF		 462 bool largeBuf:1; /* if valid response, is pointer to large buf */
463 bool multiRsp:1; /* multiple trans2 responses for one request */
464 bool multiEnd:1; /* both received */
1da177e4
LT		 465};
466
467struct oplock_q_entry {
468 struct list_head qhead;
d38d8c74
SF		 469 struct inode *pinode;
470 struct cifsTconInfo *tcon;
1da177e4
LT		 471 __u16 netfid;
472};
473
ff5dbd9e
SF		 474/* for pending dnotify requests */
475struct dir_notify_req {
476 struct list_head lhead;
477 __le16 Pid;
478 __le16 PidHigh;
479 __u16 Mid;
480 __u16 Tid;
481 __u16 Uid;
482 __u16 netfid;
483 __u32 filter; /* CompletionFilter (for multishot) */
484 int multishot;
d38d8c74 485 struct file *pfile;
ff5dbd9e
SF		 486};
487
366781c1
SF		 488struct dfs_info3_param {
489 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
8aad018b 490 int path_consumed;
366781c1
SF		 491 int server_type;
492 int ref_flag;
493 char *path_name;
494 char *node_name;
495};
496
cc0bad75
JL		 497/*
498 * common struct for holding inode info when searching for or updating an
499 * inode with new info
500 */
501
502#define CIFS_FATTR_DFS_REFERRAL 0x1
0b8f18e3
JL		 503#define CIFS_FATTR_DELETE_PENDING 0x2
504#define CIFS_FATTR_NEED_REVAL 0x4
cc0bad75
JL		 505
506struct cifs_fattr {
507 u32 cf_flags;
508 u32 cf_cifsattrs;
509 u64 cf_uniqueid;
510 u64 cf_eof;
511 u64 cf_bytes;
512 uid_t cf_uid;
513 gid_t cf_gid;
514 umode_t cf_mode;
515 dev_t cf_rdev;
516 unsigned int cf_nlink;
517 unsigned int cf_dtype;
518 struct timespec cf_atime;
519 struct timespec cf_mtime;
520 struct timespec cf_ctime;
521};
522
366781c1
SF		 523static inline void free_dfs_info_param(struct dfs_info3_param *param)
524{
525 if (param) {
526 kfree(param->path_name);
527 kfree(param->node_name);
528 kfree(param);
529 }
530}
531
532static inline void free_dfs_info_array(struct dfs_info3_param *param,
533 int number_of_items)
534{
535 int i;
536 if ((number_of_items == 0) || (param == NULL))
537 return;
538 for (i = 0; i < number_of_items; i++) {
539 kfree(param[i].path_name);
540 kfree(param[i].node_name);
541 }
542 kfree(param);
543}
544
1da177e4
LT		 545#define MID_FREE 0
546#define MID_REQUEST_ALLOCATED 1
547#define MID_REQUEST_SUBMITTED 2
548#define MID_RESPONSE_RECEIVED 4
549#define MID_RETRY_NEEDED 8 /* session closed while this request out */
550#define MID_NO_RESP_NEEDED 0x10
ec637e3f
SF		 551
552/* Types of response buffer returned from SendReceive2 */
553#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
554#define CIFS_SMALL_BUFFER 1
555#define CIFS_LARGE_BUFFER 2
556#define CIFS_IOVEC 4 /* array of response buffers */
1da177e4 557
133672ef
SF		 558/* Type of Request to SendReceive2 */
559#define CIFS_STD_OP 0 /* normal request timeout */
560#define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
561#define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
562#define CIFS_BLOCKING_OP 4 /* operation can block */
563#define CIFS_ASYNC_OP 8 /* do not wait for response */
564#define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
565#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
566#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
567#define CIFS_NO_RESP 0x040 /* no response buffer required */
568
3979877e
SF		 569/* Security Flags: indicate type of session setup needed */
570#define CIFSSEC_MAY_SIGN 0x00001
571#define CIFSSEC_MAY_NTLM 0x00002
572#define CIFSSEC_MAY_NTLMV2 0x00004
573#define CIFSSEC_MAY_KRB5 0x00008
574#ifdef CONFIG_CIFS_WEAK_PW_HASH
575#define CIFSSEC_MAY_LANMAN 0x00010
576#define CIFSSEC_MAY_PLNTXT 0x00020
516897a2
SF		 577#else
578#define CIFSSEC_MAY_LANMAN 0
579#define CIFSSEC_MAY_PLNTXT 0
3979877e
SF		 580#endif /* weak passwords */
581#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
ac683924 582#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
3979877e
SF		 583
584#define CIFSSEC_MUST_SIGN 0x01001
585/* note that only one of the following can be set so the
586result of setting MUST flags more than once will be to
587require use of the stronger protocol */
588#define CIFSSEC_MUST_NTLM 0x02002
589#define CIFSSEC_MUST_NTLMV2 0x04004
590#define CIFSSEC_MUST_KRB5 0x08008
591#ifdef CONFIG_CIFS_WEAK_PW_HASH
592#define CIFSSEC_MUST_LANMAN 0x10010
593#define CIFSSEC_MUST_PLNTXT 0x20020
0d3a01fa 594#ifdef CONFIG_CIFS_UPCALL
20d1752f 595#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
0d3a01fa 596#else
20d1752f 597#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
016ec75f 598#endif /* UPCALL */
0d3a01fa
JL		 599#else /* do not allow weak pw hash */
600#ifdef CONFIG_CIFS_UPCALL
ac683924 601#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
d38d8c74 602#else
ac683924 603#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
016ec75f 604#endif /* UPCALL */
3979877e
SF		 605#endif /* WEAK_PW_HASH */
606#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
ac683924 607#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
3979877e 608
ef571cad
SP		 609#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
610#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
ac683924 611#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
1da177e4
LT		 612/*
613 *****************************************************************
614 * All constants go here
615 *****************************************************************
616 */
617
618#define UID_HASH (16)
619
620/*
621 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
622 * following to be declared.
623 */
624
625/****************************************************************************
626 * Locking notes. All updates to global variables and lists should be
627 * protected by spinlocks or semaphores.
628 *
629 * Spinlocks
630 * ---------
631 * GlobalMid_Lock protects:
632 * list operations on pending_mid_q and oplockQ
633 * updates to XID counters, multiplex id and SMB sequence numbers
634 * GlobalSMBSesLock protects:
635 * list operations on tcp and SMB session lists and tCon lists
636 * f_owner.lock protects certain per file struct operations
637 * mapping->page_lock protects certain per page operations
638 *
639 * Semaphores
640 * ----------
641 * sesSem operations on smb session
642 * tconSem operations on tree connection
d38d8c74 643 * fh_sem file handle reconnection operations
1da177e4
LT		 644 *
645 ****************************************************************************/
646
647#ifdef DECLARE_GLOBALS_HERE
648#define GLOBAL_EXTERN
649#else
650#define GLOBAL_EXTERN extern
651#endif
652
e7ddee90
JL		 653/*
654 * the list of TCP_Server_Info structures, ie each of the sockets
fb396016 655 * connecting our client to a distinct server (ip address), is
e7ddee90 656 * chained together by cifs_tcp_ses_list. The list of all our SMB
fb396016 657 * sessions (and from that the tree connections) can be found
e7ddee90
JL		 658 * by iterating over cifs_tcp_ses_list
659 */
660GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
661
f1987b44
JL		 662/*
663 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
664 * tcp session, and the list of tcon's per smb session. It also protects
665 * the reference counters for the server, smb session, and tcon. Finally,
666 * changes to the tcon->tidStatus should be done while holding this lock.
667 */
e7ddee90 668GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock;
ddb4cbfc
SF		 669
670/*
671 * This lock protects the cifs_file->llist and cifs_file->flist
672 * list operations, and updates to some flags (cifs_file->invalidHandle)
673 * It will be moved to either use the tcon->stat_lock or equivalent later.
674 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
675 * the cifs_tcp_ses_lock must be grabbed first and released last.
676 */
677GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
1da177e4 678
99ee4dbd
SF		 679/* Outstanding dir notify requests */
680GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
681/* DirNotify response queue */
682GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
ff5dbd9e 683
1da177e4
LT		 684/*
685 * Global transaction id (XID) information
686 */
687GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
254e55ed 688GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
1da177e4 689GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
254e55ed
SF		 690GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
691 /* on midQ entries */
1da177e4
LT		 692GLOBAL_EXTERN char Local_System_Name[15];
693
694/*
695 * Global counters, updated atomically
696 */
697GLOBAL_EXTERN atomic_t sesInfoAllocCount;
698GLOBAL_EXTERN atomic_t tconInfoAllocCount;
699GLOBAL_EXTERN atomic_t tcpSesAllocCount;
700GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
701GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
702
aaa9bbe0 703/* Various Debug counters */
4498eed5
SF		 704GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
705#ifdef CONFIG_CIFS_STATS2
706GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
707GLOBAL_EXTERN atomic_t totSmBufAllocCount;
708#endif
709GLOBAL_EXTERN atomic_t smBufAllocCount;
1da177e4
LT		 710GLOBAL_EXTERN atomic_t midCount;
711
712/* Misc globals */
254e55ed 713GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
1da177e4 714 to be established on existing mount if we
d38d8c74 715 have the uid/password or Kerberos credential
1da177e4
LT		 716 or equivalent for current user */
717GLOBAL_EXTERN unsigned int oplockEnabled;
718GLOBAL_EXTERN unsigned int experimEnabled;
719GLOBAL_EXTERN unsigned int lookupCacheEnabled;
04912d6a 720GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
1da177e4 721 with more secure ntlmssp2 challenge/resp */
1da177e4
LT		 722GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
723GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
724GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
725GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
726GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
727GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
728
3bc303c2 729extern const struct slow_work_ops cifs_oplock_break_ops;
kernel source for telekom puls (alcatel/mediatek)