4 * Copyright (C) International Business Machines Corp., 2002,2003
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
19 #include <linux/in6.h>
20 #include "cifs_fs_sb.h"
22 * The sizes of various internal tables and strings
24 #define MAX_UID_INFO 16
25 #define MAX_SES_INFO 2
26 #define MAX_TCON_INFO 4
28 #define MAX_TREE_SIZE 2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1
29 #define MAX_SERVER_SIZE 15
30 #define MAX_SHARE_SIZE 64 /* used to be 20 - this should still be enough */
31 #define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
32 termination then *2 for unicode versions */
33 #define MAX_PASSWORD_SIZE 16
36 * MAX_REQ is the maximum number of requests that WE will send
37 * on one NetBIOS handle concurently.
41 #define SERVER_NAME_LENGTH 15
42 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
44 /* used to define string lengths for reversing unicode strings */
46 /* (max path length + 1 for null) * 2 for unicode */
59 #ifndef XATTR_DOS_ATTRIB
60 #define XATTR_DOS_ATTRIB "user.DOSATTRIB"
64 * This information is kept on every Server we know about.
66 * Some things to note:
69 #define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
72 * CIFS vfs client Status information (based on what we know.)
75 /* associated with each tcp and smb session */
84 NTLM = 0, /* Legacy NTLM012 auth with NTLM hash */
85 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
86 RawNTLMSSP, /* NTLMSSP without SPNEGO */
87 NTLMSSP, /* NTLMSSP via SPNEGO */
88 Kerberos /* Kerberos via SPNEGO */
95 /* Netbios frames protocol not supported at this time */
99 *****************************************************************
100 * Except the CIFS PDUs themselves all the
101 * globally interesting structs should go here
102 *****************************************************************
105 struct TCP_Server_Info {
106 char server_Name[SERVER_NAME_LEN_WITH_NULL]; /* 15 chars + X'20'in 16th */
107 char unicode_server_Name[SERVER_NAME_LEN_WITH_NULL * 2]; /* Unicode version of server_Name */
108 struct socket *ssocket;
110 struct sockaddr_in sockAddr;
111 struct sockaddr_in6 sockAddr6;
113 wait_queue_head_t response_q;
114 struct list_head pending_mid_q;
115 void *Server_NlsInfo; /* BB - placeholder for future NLS info */
116 unsigned short server_codepage; /* codepage for the server */
117 unsigned long ip_address; /* IP addr for the server if known */
118 enum protocolEnum protocolType;
121 int svlocal:1; /* local server or remote */
122 atomic_t socketUseCount; /* indicates if the server has any open cifs sessions */
123 enum statusEnum tcpStatus; /* what we think the status is */
124 struct semaphore tcpSem;
125 struct task_struct *tsk;
126 char server_GUID[16];
128 enum securityEnum secType;
129 unsigned int maxReq; /* Clients should submit no more */
130 /* than maxReq distinct unanswered SMBs to the server when using */
131 /* multiplexed reads or writes */
132 unsigned int maxBuf; /* maxBuf specifies the maximum */
133 /* message size the server can send or receive for non-raw SMBs */
134 unsigned int maxRw; /* maxRw specifies the maximum */
135 /* message size the server can send or receive for */
136 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
137 char sessid[4]; /* unique token id for this session */
138 /* (returned on Negotiate */
139 int capabilities; /* allow selective disabling of caps by smb sess */
141 char cryptKey[CIFS_CRYPTO_KEY_SIZE];
142 char workstation_RFC1001_name[16]; /* 16th byte is always zero */
146 * The following is our shortcut to user information. We surface the uid,
147 * and name. We always get the password on the fly in case it
148 * has changed. We also hang a list of sessions owned by this user off here.
151 struct list_head userList;
152 struct list_head sessionList; /* SMB sessions for this user */
154 char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */
155 /* BB may need ptr or callback for PAM or WinBind info */
159 * Session structure. One of these for each uid session with a particular host
162 struct list_head cifsSessionList;
163 struct semaphore sesSem;
164 struct cifsUidInfo *uidInfo; /* pointer to user info */
165 struct TCP_Server_Info *server; /* pointer to server info */
166 atomic_t inUse; /* # of CURRENT users of this ses */
167 enum statusEnum status;
168 __u32 sequence_number; /* needed for CIFS PDU signature */
169 __u16 ipc_tid; /* special tid for connection to IPC share */
170 char mac_signing_key[CIFS_SESSION_KEY_SIZE + 16];
171 char *serverOS; /* name of operating system underlying the server */
172 char *serverNOS; /* name of network operating system that the server is running */
173 char *serverDomain; /* security realm of server */
174 int Suid; /* remote smb uid */
175 uid_t linux_uid; /* local Linux uid */
177 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for tcp names - will ipv6 and sctp addresses fit here?? */
178 char userName[MAX_USERNAME_SIZE + 1];
179 char domainName[MAX_USERNAME_SIZE + 1];
184 * there is one of these for each connection to a resource on a particular
187 struct cifsTconInfo {
188 struct list_head cifsConnectionList;
189 struct list_head openFileList;
190 struct semaphore tconSem;
191 struct cifsSesInfo *ses; /* pointer to session associated with */
192 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource (in ASCII not UTF) */
193 char *nativeFileSystem;
194 __u16 tid; /* The 2 byte tree id */
195 __u16 Flags; /* optional support bits */
196 enum statusEnum tidStatus;
197 atomic_t useCount; /* how many mounts (explicit or implicit) to this share */
198 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
199 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if file system name truncated */
200 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
202 /* BB add field for back pointer to sb struct? */
206 * This info hangs off the cifsFileInfo structure. This is used to track
207 * byte stream locks on the file
209 struct cifsLockInfo {
210 struct cifsLockInfo *next;
217 * One of these for each open instance of a file
219 struct cifsFileInfo {
220 struct list_head tlist; /* pointer to next fid owned by tcon */
221 struct list_head flist; /* next fid (file instance) for this inode */
222 unsigned int uid; /* allows finding which FileInfo structure */
223 __u32 pid; /* process id who opened file */
224 __u16 netfid; /* file id from remote */
225 /* BB add lock scope info here if needed */ ;
226 /* lock scope id (0 if none) */
227 struct file * pfile; /* needed for writepage */
228 struct inode * pInode; /* needed for oplock break */
229 int endOfSearch:1; /* we have reached end of search */
230 int closePend:1; /* file is marked to close */
232 int invalidHandle:1; /* file closed via session abend */
233 struct semaphore fh_sem; /* prevents reopen race after dead ses*/
234 char * search_resume_name;
235 unsigned int resume_name_length;
240 * One of these for each file inode
243 struct cifsInodeInfo {
244 struct list_head lockList;
245 /* BB add in lists for dirty pages - i.e. write caching info for oplock */
246 struct list_head openFileList;
248 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
249 atomic_t inUse; /* num concurrent users (local openers cifs) of file*/
250 unsigned long time; /* jiffies of last update/check of inode */
251 int clientCanCacheRead:1; /* read oplock */
252 int clientCanCacheAll:1; /* read and writebehind oplock */
254 struct inode vfs_inode;
257 static inline struct cifsInodeInfo *
258 CIFS_I(struct inode *inode)
260 return container_of(inode, struct cifsInodeInfo, vfs_inode);
263 static inline struct cifs_sb_info *
264 CIFS_SB(struct super_block *sb)
266 return sb->s_fs_info;
270 /* one of these for every pending CIFS request to the server */
272 struct list_head qhead; /* mids waiting on reply from this server */
273 __u16 mid; /* multiplex id */
274 __u16 pid; /* process id */
275 __u32 sequence_number; /* for CIFS signing */
276 __u16 command; /* smb command code */
277 struct timeval when_sent; /* time when smb sent */
278 struct cifsSesInfo *ses; /* smb was sent to this server */
279 struct task_struct *tsk; /* task waiting for response */
280 struct smb_hdr *resp_buf; /* response buffer */
281 int midState; /* wish this were enum but can not pass to wait_event */
284 struct oplock_q_entry {
285 struct list_head qhead;
286 struct inode * pinode;
287 struct cifsTconInfo * tcon;
292 #define MID_REQUEST_ALLOCATED 1
293 #define MID_REQUEST_SUBMITTED 2
294 #define MID_RESPONSE_RECEIVED 4
295 #define MID_RETRY_NEEDED 8 /* session closed while this request out */
297 struct servers_not_supported { /* @z4a */
298 struct servers_not_supported *next1; /* @z4a */
299 char server_Name[SERVER_NAME_LEN_WITH_NULL]; /* @z4a */
300 /* Server Names in SMB protocol are 15 chars + X'20' */
301 /* in 16th byte... @z4a */
305 *****************************************************************
306 * All constants go here
307 *****************************************************************
310 #define UID_HASH (16)
313 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
314 * following to be declared.
317 /****************************************************************************
318 * Locking notes. All updates to global variables and lists should be
319 * protected by spinlocks or semaphores.
323 * GlobalMid_Lock protects:
324 * list operations on pending_mid_q and oplockQ
325 * updates to XID counters, multiplex id and SMB sequence numbers
326 * GlobalSMBSesLock protects:
327 * list operations on tcp and SMB session lists and tCon lists
328 * f_owner.lock protects certain per file struct operations
329 * mapping->page_lock protects certain per page operations
333 * sesSem operations on smb session
334 * tconSem operations on tree connection
335 * fh_sem file handle reconnection operations
337 ****************************************************************************/
339 #ifdef DECLARE_GLOBALS_HERE
340 #define GLOBAL_EXTERN
342 #define GLOBAL_EXTERN extern
346 * The list of servers that did not respond with NT LM 0.12.
347 * This list helps improve performance and eliminate the messages indicating
348 * that we had a communications error talking to the server in this list.
350 GLOBAL_EXTERN struct servers_not_supported *NotSuppList; /*@z4a */
353 * The following is a hash table of all the users we know about.
355 GLOBAL_EXTERN struct smbUidInfo *GlobalUidList[UID_HASH];
357 GLOBAL_EXTERN struct list_head GlobalServerList; /* BB not implemented yet */
358 GLOBAL_EXTERN struct list_head GlobalSMBSessionList;
359 GLOBAL_EXTERN struct list_head GlobalTreeConnectionList;
360 GLOBAL_EXTERN rwlock_t GlobalSMBSeslock; /* protects list inserts on 3 above */
362 GLOBAL_EXTERN struct list_head GlobalOplock_Q;
365 * Global transaction id (XID) information
367 GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
368 GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
369 GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
370 GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above and list operations */
371 /* on midQ entries */
372 GLOBAL_EXTERN char Local_System_Name[15];
375 * Global counters, updated atomically
377 GLOBAL_EXTERN atomic_t sesInfoAllocCount;
378 GLOBAL_EXTERN atomic_t tconInfoAllocCount;
380 GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
381 GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
383 /* Various Debug counters to remove someday (BB) */
384 GLOBAL_EXTERN atomic_t bufAllocCount;
385 GLOBAL_EXTERN atomic_t midCount;
388 GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
389 to be established on existing mount if we
390 have the uid/password or Kerberos credential
391 or equivalent for current user */
392 GLOBAL_EXTERN unsigned int oplockEnabled;
393 GLOBAL_EXTERN unsigned int quotaEnabled;
394 GLOBAL_EXTERN unsigned int lookupCacheEnabled;
395 GLOBAL_EXTERN unsigned int extended_security; /* if on, session setup sent
396 with more secure ntlmssp2 challenge/resp */
397 GLOBAL_EXTERN unsigned int ntlmv2_support; /* better optional password hash */
398 GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
399 GLOBAL_EXTERN unsigned int linuxExtEnabled; /* enable Linux/Unix CIFS extensions */