blob: 69a2e1942542e1601e9e66078a1c052b86d51742 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/cifsglob.h
3 *
Steve French366781c2008-01-25 10:12:41 +00004 * Copyright (C) International Business Machines Corp., 2002,2008
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Author(s): Steve French (sfrench@us.ibm.com)
Jeremy Allison7ee1af72006-08-02 21:56:33 +00006 * Jeremy Allison (jra@samba.org)
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
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.
Steve Frenchd38d8c72007-06-28 19:44:13 +000017 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070018 */
19#include <linux/in.h>
20#include <linux/in6.h>
21#include "cifs_fs_sb.h"
Steve French442aa312007-09-24 20:25:46 +000022#include "cifsacl.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070023/*
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
Steve Frenchd38d8c72007-06-28 19:44:13 +000032#define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#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
Steve Frenchd38d8c72007-06-28 19:44:13 +000042 * value of max multiplex returned by servers. We may
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 * 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 */
Steve Frenchd38d8c72007-06-28 19:44:13 +000048#define CIFS_MAX_REQ 50
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
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/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 * CIFS vfs client Status information (based on what we know.)
74 */
75
76 /* associated with each tcp and smb session */
77enum statusEnum {
78 CifsNew = 0,
79 CifsGood,
80 CifsExiting,
81 CifsNeedReconnect
82};
83
84enum securityEnum {
Steve Frencha0136892007-10-04 20:05:09 +000085 PLAINTXT = 0, /* Legacy with Plaintext passwords */
86 LANMAN, /* Legacy LANMAN auth */
Steve French39798772006-05-31 22:40:51 +000087 NTLM, /* Legacy NTLM012 auth with NTLM hash */
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
89 RawNTLMSSP, /* NTLMSSP without SPNEGO */
90 NTLMSSP, /* NTLMSSP via SPNEGO */
91 Kerberos /* Kerberos via SPNEGO */
92};
93
94enum protocolEnum {
95 IPV4 = 0,
96 IPV6,
97 SCTP
98 /* Netbios frames protocol not supported at this time */
99};
100
Steve Frenchb609f062007-07-09 07:55:14 +0000101struct mac_key {
102 unsigned int len;
103 union {
104 char ntlm[CIFS_SESS_KEY_SIZE + 16];
Steve French24424212007-11-16 23:37:35 +0000105 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
Steve Frenchb609f062007-07-09 07:55:14 +0000106 struct {
107 char key[16];
108 struct ntlmv2_resp resp;
109 } ntlmv2;
110 } data;
111};
112
Steve French442aa312007-09-24 20:25:46 +0000113struct cifs_cred {
114 int uid;
115 int gid;
116 int mode;
117 int cecount;
118 struct cifs_sid osid;
119 struct cifs_sid gsid;
120 struct cifs_ntace *ntaces;
121 struct cifs_ace *aces;
122};
123
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124/*
125 *****************************************************************
126 * Except the CIFS PDUs themselves all the
127 * globally interesting structs should go here
128 *****************************************************************
129 */
130
131struct TCP_Server_Info {
Steve Frencha10faeb22005-08-22 21:38:31 -0700132 /* 15 character server name + 0x20 16th byte indicating type = srv */
133 char server_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
Steve Frenchd3485d32005-08-19 11:04:29 -0700134 char unicode_server_Name[SERVER_NAME_LEN_WITH_NULL * 2];
Jeff Laytonc359cf32007-11-16 22:22:06 +0000135 char *hostname; /* hostname portion of UNC string */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 struct socket *ssocket;
137 union {
138 struct sockaddr_in sockAddr;
139 struct sockaddr_in6 sockAddr6;
140 } addr;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000141 wait_queue_head_t response_q;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 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 */
Steve French131afd0b2005-10-07 09:51:05 -0700146 unsigned long ip_address; /* IP addr for the server if known */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000147 enum protocolEnum protocolType;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 char versionMajor;
149 char versionMinor;
150 unsigned svlocal:1; /* local server or remote */
151 atomic_t socketUseCount; /* number of open cifs sessions on socket */
152 atomic_t inFlight; /* number of requests on the wire to server */
Steve French131afd0b2005-10-07 09:51:05 -0700153#ifdef CONFIG_CIFS_STATS2
154 atomic_t inSend; /* requests trying to send */
155 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
156#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 enum statusEnum tcpStatus; /* what we think the status is */
158 struct semaphore tcpSem;
159 struct task_struct *tsk;
160 char server_GUID[16];
161 char secMode;
162 enum securityEnum secType;
163 unsigned int maxReq; /* Clients should submit no more */
164 /* than maxReq distinct unanswered SMBs to the server when using */
165 /* multiplexed reads or writes */
166 unsigned int maxBuf; /* maxBuf specifies the maximum */
167 /* message size the server can send or receive for non-raw SMBs */
168 unsigned int maxRw; /* maxRw specifies the maximum */
169 /* message size the server can send or receive for */
170 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
171 char sessid[4]; /* unique token id for this session */
172 /* (returned on Negotiate */
173 int capabilities; /* allow selective disabling of caps by smb sess */
Steve Frenchde7ed552006-09-30 13:25:52 +0000174 int timeAdj; /* Adjust for difference in server time zone in sec */
Steve French1982c342005-08-17 12:38:22 -0700175 __u16 CurrentMid; /* multiplex id - rotating counter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 char cryptKey[CIFS_CRYPTO_KEY_SIZE];
Steve Frencha10faeb22005-08-22 21:38:31 -0700177 /* 16th byte of RFC1001 workstation name is always null */
178 char workstation_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
Steve Frenchad009ac2005-04-28 22:41:05 -0700179 __u32 sequence_number; /* needed for CIFS PDU signature */
Steve Frenchb609f062007-07-09 07:55:14 +0000180 struct mac_key mac_signing_key;
181 char ntlmv2_hash[16];
Steve French3a5ff612006-07-14 22:37:11 +0000182 unsigned long lstrp; /* when we got last response from this server */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183};
184
185/*
186 * The following is our shortcut to user information. We surface the uid,
187 * and name. We always get the password on the fly in case it
Steve Frenchd38d8c72007-06-28 19:44:13 +0000188 * has changed. We also hang a list of sessions owned by this user off here.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 */
190struct cifsUidInfo {
191 struct list_head userList;
192 struct list_head sessionList; /* SMB sessions for this user */
193 uid_t linux_uid;
194 char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */
195 /* BB may need ptr or callback for PAM or WinBind info */
196};
197
198/*
199 * Session structure. One of these for each uid session with a particular host
200 */
201struct cifsSesInfo {
202 struct list_head cifsSessionList;
203 struct semaphore sesSem;
Steve French39798772006-05-31 22:40:51 +0000204#if 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 struct cifsUidInfo *uidInfo; /* pointer to user info */
Steve French39798772006-05-31 22:40:51 +0000206#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 struct TCP_Server_Info *server; /* pointer to server info */
208 atomic_t inUse; /* # of mounts (tree connections) on this ses */
209 enum statusEnum status;
Steve French750d1152006-06-27 06:28:30 +0000210 unsigned overrideSecFlg; /* if non-zero override global sec flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 __u16 ipc_tid; /* special tid for connection to IPC share */
212 __u16 flags;
Steve Frenchad009ac2005-04-28 22:41:05 -0700213 char *serverOS; /* name of operating system underlying server */
214 char *serverNOS; /* name of network operating system of server */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 char *serverDomain; /* security realm of server */
216 int Suid; /* remote smb uid */
217 uid_t linux_uid; /* local Linux uid */
218 int capabilities;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000219 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
Steve Frenchad009ac2005-04-28 22:41:05 -0700220 TCP names - will ipv6 and sctp addresses fit? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 char userName[MAX_USERNAME_SIZE + 1];
Steve Frenchd38d8c72007-06-28 19:44:13 +0000222 char *domainName;
223 char *password;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224};
Steve French9ac00b72006-09-30 04:13:17 +0000225/* no more than one of the following three session flags may be set */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226#define CIFS_SES_NT4 1
Steve French9ac00b72006-09-30 04:13:17 +0000227#define CIFS_SES_OS2 2
228#define CIFS_SES_W9X 4
229/* following flag is set for old servers such as OS2 (and Win95?)
230 which do not negotiate NTLM or POSIX dialects, but instead
231 negotiate one of the older LANMAN dialects */
232#define CIFS_SES_LANMAN 8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233/*
234 * there is one of these for each connection to a resource on a particular
Steve Frenchd38d8c72007-06-28 19:44:13 +0000235 * session
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 */
237struct cifsTconInfo {
238 struct list_head cifsConnectionList;
239 struct list_head openFileList;
240 struct semaphore tconSem;
241 struct cifsSesInfo *ses; /* pointer to session associated with */
Steve French254e55e2006-06-04 05:53:15 +0000242 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 char *nativeFileSystem;
244 __u16 tid; /* The 2 byte tree id */
245 __u16 Flags; /* optional support bits */
246 enum statusEnum tidStatus;
Steve French254e55e2006-06-04 05:53:15 +0000247 atomic_t useCount; /* how many explicit/implicit mounts to share */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248#ifdef CONFIG_CIFS_STATS
249 atomic_t num_smbs_sent;
250 atomic_t num_writes;
251 atomic_t num_reads;
252 atomic_t num_oplock_brks;
253 atomic_t num_opens;
Steve Frencha5a2b482005-08-20 21:42:53 -0700254 atomic_t num_closes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 atomic_t num_deletes;
256 atomic_t num_mkdirs;
257 atomic_t num_rmdirs;
258 atomic_t num_renames;
259 atomic_t num_t2renames;
Steve Frenchdfb75332005-06-22 17:13:47 -0700260 atomic_t num_ffirst;
261 atomic_t num_fnext;
262 atomic_t num_fclose;
Steve Frencha5a2b482005-08-20 21:42:53 -0700263 atomic_t num_hardlinks;
264 atomic_t num_symlinks;
265 atomic_t num_locks;
Steve French0a4b92c2006-01-12 15:44:21 -0800266 atomic_t num_acl_get;
267 atomic_t num_acl_set;
Steve Frencha5a2b482005-08-20 21:42:53 -0700268#ifdef CONFIG_CIFS_STATS2
269 unsigned long long time_writes;
270 unsigned long long time_reads;
271 unsigned long long time_opens;
272 unsigned long long time_deletes;
273 unsigned long long time_closes;
274 unsigned long long time_mkdirs;
275 unsigned long long time_rmdirs;
276 unsigned long long time_renames;
277 unsigned long long time_t2renames;
278 unsigned long long time_ffirst;
279 unsigned long long time_fnext;
280 unsigned long long time_fclose;
281#endif /* CONFIG_CIFS_STATS2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 __u64 bytes_read;
283 __u64 bytes_written;
284 spinlock_t stat_lock;
Steve Frencha5a2b482005-08-20 21:42:53 -0700285#endif /* CONFIG_CIFS_STATS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
Steve French254e55e2006-06-04 05:53:15 +0000287 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
Steve French7f8ed422007-09-28 22:28:55 +0000289 unsigned ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 unsigned retry:1;
Steve Frenchd3485d32005-08-19 11:04:29 -0700291 unsigned nocase:1;
Steve Frenchc18c8422007-07-18 23:21:09 +0000292 unsigned unix_ext:1; /* if off disable Linux extensions to CIFS protocol
293 for this mount even if server would support */
294 /* BB add field for back pointer to sb struct(s)? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295};
296
297/*
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000298 * This info hangs off the cifsFileInfo structure, pointed to by llist.
299 * This is used to track byte stream locks on the file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 */
301struct cifsLockInfo {
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000302 struct list_head llist; /* pointer to next cifsLockInfo */
303 __u64 offset;
304 __u64 length;
305 __u8 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306};
307
308/*
309 * One of these for each open instance of a file
310 */
311struct cifs_search_info {
312 loff_t index_of_last_entry;
313 __u16 entries_in_buffer;
314 __u16 info_level;
315 __u32 resume_key;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000316 char *ntwrk_buf_start;
317 char *srch_entries_start;
318 char *presume_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 unsigned int resume_name_len;
320 unsigned endOfSearch:1;
321 unsigned emptyDir:1;
322 unsigned unicode:1;
Steve Frenchec637e32005-12-12 20:53:18 -0800323 unsigned smallBuf:1; /* so we know which buf_release function to call */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324};
325
326struct cifsFileInfo {
327 struct list_head tlist; /* pointer to next fid owned by tcon */
328 struct list_head flist; /* next fid (file instance) for this inode */
329 unsigned int uid; /* allows finding which FileInfo structure */
330 __u32 pid; /* process id who opened file */
331 __u16 netfid; /* file id from remote */
332 /* BB add lock scope info here if needed */ ;
333 /* lock scope id (0 if none) */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000334 struct file *pfile; /* needed for writepage */
335 struct inode *pInode; /* needed for oplock break */
Roland Dreier796e5662007-05-03 04:33:45 +0000336 struct mutex lock_mutex;
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000337 struct list_head llist; /* list of byte range locks we have. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 unsigned closePend:1; /* file is marked to close */
339 unsigned invalidHandle:1; /* file closed via session abend */
Steve French92ad9b92007-09-29 05:21:58 +0000340 unsigned messageMode:1; /* for pipes: message vs byte mode */
Steve French23e7dd72005-10-20 13:44:56 -0700341 atomic_t wrtPending; /* handle in use - defer close */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 struct semaphore fh_sem; /* prevents reopen race after dead ses*/
Steve Frenchd38d8c72007-06-28 19:44:13 +0000343 char *search_resume_name; /* BB removeme BB */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 struct cifs_search_info srch_inf;
345};
346
347/*
348 * One of these for each file inode
349 */
350
351struct cifsInodeInfo {
352 struct list_head lockList;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000353 /* BB add in lists for dirty pages i.e. write caching info for oplock */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 struct list_head openFileList;
355 int write_behind_rc;
356 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
357 atomic_t inUse; /* num concurrent users (local openers cifs) of file*/
358 unsigned long time; /* jiffies of last update/check of inode */
359 unsigned clientCanCacheRead:1; /* read oplock */
360 unsigned clientCanCacheAll:1; /* read and writebehind oplock */
361 unsigned oplockPending:1;
362 struct inode vfs_inode;
363};
364
365static inline struct cifsInodeInfo *
366CIFS_I(struct inode *inode)
367{
368 return container_of(inode, struct cifsInodeInfo, vfs_inode);
369}
370
371static inline struct cifs_sb_info *
372CIFS_SB(struct super_block *sb)
373{
374 return sb->s_fs_info;
375}
376
Steve Frenchab2f2182005-09-15 20:44:50 -0700377static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
Jeremy Allisonac670552005-06-22 17:26:35 -0700378{
379 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
380 return '/';
381 else
382 return '\\';
383}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
Steve Frencha4544342005-08-24 13:59:35 -0700385#ifdef CONFIG_CIFS_STATS
386#define cifs_stats_inc atomic_inc
387
388static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
389 unsigned int bytes)
390{
391 if (bytes) {
392 spin_lock(&tcon->stat_lock);
393 tcon->bytes_written += bytes;
394 spin_unlock(&tcon->stat_lock);
395 }
396}
397
398static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
399 unsigned int bytes)
400{
401 spin_lock(&tcon->stat_lock);
402 tcon->bytes_read += bytes;
403 spin_unlock(&tcon->stat_lock);
404}
405#else
406
Steve Frenchd38d8c72007-06-28 19:44:13 +0000407#define cifs_stats_inc(field) do {} while (0)
408#define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
409#define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
Steve Frencha4544342005-08-24 13:59:35 -0700410
411#endif
412
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413/* one of these for every pending CIFS request to the server */
414struct mid_q_entry {
415 struct list_head qhead; /* mids waiting on reply from this server */
416 __u16 mid; /* multiplex id */
417 __u16 pid; /* process id */
418 __u32 sequence_number; /* for CIFS signing */
Steve French1047abc2005-10-11 19:58:06 -0700419 unsigned long when_alloc; /* when mid was created */
420#ifdef CONFIG_CIFS_STATS2
421 unsigned long when_sent; /* time when smb send finished */
422 unsigned long when_received; /* when demux complete (taken off wire) */
423#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 struct cifsSesInfo *ses; /* smb was sent to this server */
425 struct task_struct *tsk; /* task waiting for response */
426 struct smb_hdr *resp_buf; /* response buffer */
427 int midState; /* wish this were enum but can not pass to wait_event */
Steve Frenchc81156d2005-04-28 22:41:07 -0700428 __u8 command; /* smb command code */
Steve Frenchc81156d2005-04-28 22:41:07 -0700429 unsigned largeBuf:1; /* if valid response, is pointer to large buf */
Steve French39798772006-05-31 22:40:51 +0000430 unsigned multiRsp:1; /* multiple trans2 responses for one request */
431 unsigned multiEnd:1; /* both received */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432};
433
434struct oplock_q_entry {
435 struct list_head qhead;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000436 struct inode *pinode;
437 struct cifsTconInfo *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 __u16 netfid;
439};
440
Steve Frenchff5dbd92005-08-24 17:10:36 -0700441/* for pending dnotify requests */
442struct dir_notify_req {
443 struct list_head lhead;
444 __le16 Pid;
445 __le16 PidHigh;
446 __u16 Mid;
447 __u16 Tid;
448 __u16 Uid;
449 __u16 netfid;
450 __u32 filter; /* CompletionFilter (for multishot) */
451 int multishot;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000452 struct file *pfile;
Steve Frenchff5dbd92005-08-24 17:10:36 -0700453};
454
Steve French366781c2008-01-25 10:12:41 +0000455struct dfs_info3_param {
456 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
Igor Mammedov8aad0182008-02-15 18:21:49 +0000457 int path_consumed;
Steve French366781c2008-01-25 10:12:41 +0000458 int server_type;
459 int ref_flag;
460 char *path_name;
461 char *node_name;
462};
463
464static inline void free_dfs_info_param(struct dfs_info3_param *param)
465{
466 if (param) {
467 kfree(param->path_name);
468 kfree(param->node_name);
469 kfree(param);
470 }
471}
472
473static inline void free_dfs_info_array(struct dfs_info3_param *param,
474 int number_of_items)
475{
476 int i;
477 if ((number_of_items == 0) || (param == NULL))
478 return;
479 for (i = 0; i < number_of_items; i++) {
480 kfree(param[i].path_name);
481 kfree(param[i].node_name);
482 }
483 kfree(param);
484}
485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486#define MID_FREE 0
487#define MID_REQUEST_ALLOCATED 1
488#define MID_REQUEST_SUBMITTED 2
489#define MID_RESPONSE_RECEIVED 4
490#define MID_RETRY_NEEDED 8 /* session closed while this request out */
491#define MID_NO_RESP_NEEDED 0x10
Steve Frenchec637e32005-12-12 20:53:18 -0800492
493/* Types of response buffer returned from SendReceive2 */
494#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
495#define CIFS_SMALL_BUFFER 1
496#define CIFS_LARGE_BUFFER 2
497#define CIFS_IOVEC 4 /* array of response buffers */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
Steve French133672e2007-11-13 22:41:37 +0000499/* Type of Request to SendReceive2 */
500#define CIFS_STD_OP 0 /* normal request timeout */
501#define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
502#define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
503#define CIFS_BLOCKING_OP 4 /* operation can block */
504#define CIFS_ASYNC_OP 8 /* do not wait for response */
505#define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
506#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
507#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
508#define CIFS_NO_RESP 0x040 /* no response buffer required */
509
Steve French39798772006-05-31 22:40:51 +0000510/* Security Flags: indicate type of session setup needed */
511#define CIFSSEC_MAY_SIGN 0x00001
512#define CIFSSEC_MAY_NTLM 0x00002
513#define CIFSSEC_MAY_NTLMV2 0x00004
514#define CIFSSEC_MAY_KRB5 0x00008
515#ifdef CONFIG_CIFS_WEAK_PW_HASH
516#define CIFSSEC_MAY_LANMAN 0x00010
517#define CIFSSEC_MAY_PLNTXT 0x00020
Steve French516897a2007-10-12 19:24:06 +0000518#else
519#define CIFSSEC_MAY_LANMAN 0
520#define CIFSSEC_MAY_PLNTXT 0
Steve French39798772006-05-31 22:40:51 +0000521#endif /* weak passwords */
522#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
Steve French5815449d2006-02-14 01:36:20 +0000523
Steve French39798772006-05-31 22:40:51 +0000524#define CIFSSEC_MUST_SIGN 0x01001
525/* note that only one of the following can be set so the
526result of setting MUST flags more than once will be to
527require use of the stronger protocol */
528#define CIFSSEC_MUST_NTLM 0x02002
529#define CIFSSEC_MUST_NTLMV2 0x04004
530#define CIFSSEC_MUST_KRB5 0x08008
531#ifdef CONFIG_CIFS_WEAK_PW_HASH
532#define CIFSSEC_MUST_LANMAN 0x10010
533#define CIFSSEC_MUST_PLNTXT 0x20020
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000534#ifdef CONFIG_CIFS_UPCALL
535#define CIFSSEC_MASK 0x3F03F /* allows weak security but also krb5 */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000536#else
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000537#define CIFSSEC_MASK 0x37037 /* current flags supported if weak */
Steve French016ec752007-10-16 18:10:10 +0000538#endif /* UPCALL */
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000539#else /* do not allow weak pw hash */
540#ifdef CONFIG_CIFS_UPCALL
541#define CIFSSEC_MASK 0x0F00F /* flags supported if no weak allowed */
542#else
543#define CIFSSEC_MASK 0x07007 /* flags supported if no weak allowed */
Steve French016ec752007-10-16 18:10:10 +0000544#endif /* UPCALL */
Steve French39798772006-05-31 22:40:51 +0000545#endif /* WEAK_PW_HASH */
546#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
547
548#define CIFSSEC_DEF CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2
549#define CIFSSEC_MAX CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2
Steve Frencha0136892007-10-04 20:05:09 +0000550#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551/*
552 *****************************************************************
553 * All constants go here
554 *****************************************************************
555 */
556
557#define UID_HASH (16)
558
559/*
560 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
561 * following to be declared.
562 */
563
564/****************************************************************************
565 * Locking notes. All updates to global variables and lists should be
566 * protected by spinlocks or semaphores.
567 *
568 * Spinlocks
569 * ---------
570 * GlobalMid_Lock protects:
571 * list operations on pending_mid_q and oplockQ
572 * updates to XID counters, multiplex id and SMB sequence numbers
573 * GlobalSMBSesLock protects:
574 * list operations on tcp and SMB session lists and tCon lists
575 * f_owner.lock protects certain per file struct operations
576 * mapping->page_lock protects certain per page operations
577 *
578 * Semaphores
579 * ----------
580 * sesSem operations on smb session
581 * tconSem operations on tree connection
Steve Frenchd38d8c72007-06-28 19:44:13 +0000582 * fh_sem file handle reconnection operations
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 *
584 ****************************************************************************/
585
586#ifdef DECLARE_GLOBALS_HERE
587#define GLOBAL_EXTERN
588#else
589#define GLOBAL_EXTERN extern
590#endif
591
592/*
593 * The list of servers that did not respond with NT LM 0.12.
594 * This list helps improve performance and eliminate the messages indicating
Steve Frenchd38d8c72007-06-28 19:44:13 +0000595 * that we had a communications error talking to the server in this list.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 */
Steve French2cd646a2006-09-28 19:43:08 +0000597/* Feature not supported */
598/* GLOBAL_EXTERN struct servers_not_supported *NotSuppList; */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599
600/*
601 * The following is a hash table of all the users we know about.
602 */
603GLOBAL_EXTERN struct smbUidInfo *GlobalUidList[UID_HASH];
604
Steve French99ee4db2007-02-27 05:35:17 +0000605/* GLOBAL_EXTERN struct list_head GlobalServerList; BB not implemented yet */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606GLOBAL_EXTERN struct list_head GlobalSMBSessionList;
607GLOBAL_EXTERN struct list_head GlobalTreeConnectionList;
608GLOBAL_EXTERN rwlock_t GlobalSMBSeslock; /* protects list inserts on 3 above */
609
610GLOBAL_EXTERN struct list_head GlobalOplock_Q;
611
Steve French99ee4db2007-02-27 05:35:17 +0000612/* Outstanding dir notify requests */
613GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
614/* DirNotify response queue */
615GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
Steve Frenchff5dbd92005-08-24 17:10:36 -0700616
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617/*
618 * Global transaction id (XID) information
619 */
620GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +0000621GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +0000623GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
624 /* on midQ entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625GLOBAL_EXTERN char Local_System_Name[15];
626
627/*
628 * Global counters, updated atomically
629 */
630GLOBAL_EXTERN atomic_t sesInfoAllocCount;
631GLOBAL_EXTERN atomic_t tconInfoAllocCount;
632GLOBAL_EXTERN atomic_t tcpSesAllocCount;
633GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
634GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
635
636/* Various Debug counters to remove someday (BB) */
Steve French4498eed52005-12-03 13:58:57 -0800637GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
638#ifdef CONFIG_CIFS_STATS2
639GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
640GLOBAL_EXTERN atomic_t totSmBufAllocCount;
641#endif
642GLOBAL_EXTERN atomic_t smBufAllocCount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643GLOBAL_EXTERN atomic_t midCount;
644
645/* Misc globals */
Steve French254e55e2006-06-04 05:53:15 +0000646GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 to be established on existing mount if we
Steve Frenchd38d8c72007-06-28 19:44:13 +0000648 have the uid/password or Kerberos credential
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 or equivalent for current user */
650GLOBAL_EXTERN unsigned int oplockEnabled;
651GLOBAL_EXTERN unsigned int experimEnabled;
652GLOBAL_EXTERN unsigned int lookupCacheEnabled;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000653GLOBAL_EXTERN unsigned int extended_security; /* if on, session setup sent
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 with more secure ntlmssp2 challenge/resp */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
657GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
658GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
659GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
660GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
661