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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>
Jeff Layton3bc303c2009-09-21 06:47:50 -040021#include <linux/slow-work.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include "cifs_fs_sb.h"
Steve French442aa312007-09-24 20:25:46 +000023#include "cifsacl.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024/*
25 * The sizes of various internal tables and strings
26 */
27#define MAX_UID_INFO 16
28#define MAX_SES_INFO 2
29#define MAX_TCON_INFO 4
30
Shirish Pargaonkaref571ca2008-07-24 15:56:05 +000031#define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#define MAX_SERVER_SIZE 15
Steve Frenchd38d8c72007-06-28 19:44:13 +000033#define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
35 termination then *2 for unicode versions */
36#define MAX_PASSWORD_SIZE 16
37
38#define CIFS_MIN_RCV_POOL 4
39
40/*
41 * MAX_REQ is the maximum number of requests that WE will send
André Goddard Rosaaf901ca2009-11-14 13:09:05 -020042 * on one socket concurrently. It also matches the most common
Steve Frenchd38d8c72007-06-28 19:44:13 +000043 * value of max multiplex returned by servers. We may
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 * eventually want to use the negotiated value (in case
45 * future servers can handle more) when we are more confident that
46 * we will not have problems oveloading the socket with pending
47 * write data.
48 */
Steve Frenchd38d8c72007-06-28 19:44:13 +000049#define CIFS_MAX_REQ 50
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Jeff Layton8ecaf672008-12-01 15:23:50 -050051#define RFC1001_NAME_LEN 15
52#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
53
54/* currently length of NIP6_FMT */
55#define SERVER_NAME_LENGTH 40
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
57
58/* used to define string lengths for reversing unicode strings */
59/* (256+1)*2 = 514 */
60/* (max path length + 1 for null) * 2 for unicode */
61#define MAX_NAME 514
62
63#include "cifspdu.h"
64
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#ifndef XATTR_DOS_ATTRIB
66#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
67#endif
68
69/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 * CIFS vfs client Status information (based on what we know.)
71 */
72
73 /* associated with each tcp and smb session */
74enum statusEnum {
75 CifsNew = 0,
76 CifsGood,
77 CifsExiting,
78 CifsNeedReconnect
79};
80
81enum securityEnum {
Steve Frencha0136892007-10-04 20:05:09 +000082 PLAINTXT = 0, /* Legacy with Plaintext passwords */
83 LANMAN, /* Legacy LANMAN auth */
Steve French39798772006-05-31 22:40:51 +000084 NTLM, /* Legacy NTLM012 auth with NTLM hash */
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
Steve Frenchac683922009-05-06 04:16:04 +000086 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
Steve Frenchf46c7232009-06-25 03:04:20 +000087/* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
Steve Frenchc16fefa2008-08-19 19:35:33 +000088 Kerberos, /* Kerberos via SPNEGO */
89 MSKerberos, /* MS Kerberos via SPNEGO */
Linus Torvalds1da177e2005-04-16 15:20:36 -070090};
91
92enum protocolEnum {
Steve French3ec332e2008-11-14 03:35:10 +000093 TCP = 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 SCTP
95 /* Netbios frames protocol not supported at this time */
96};
97
Steve Frenchb609f062007-07-09 07:55:14 +000098struct mac_key {
99 unsigned int len;
100 union {
101 char ntlm[CIFS_SESS_KEY_SIZE + 16];
Steve French24424212007-11-16 23:37:35 +0000102 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
Steve Frenchb609f062007-07-09 07:55:14 +0000103 struct {
104 char key[16];
105 struct ntlmv2_resp resp;
106 } ntlmv2;
107 } data;
108};
109
Steve French442aa312007-09-24 20:25:46 +0000110struct cifs_cred {
111 int uid;
112 int gid;
113 int mode;
114 int cecount;
115 struct cifs_sid osid;
116 struct cifs_sid gsid;
117 struct cifs_ntace *ntaces;
118 struct cifs_ace *aces;
119};
120
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121/*
122 *****************************************************************
123 * Except the CIFS PDUs themselves all the
124 * globally interesting structs should go here
125 *****************************************************************
126 */
127
128struct TCP_Server_Info {
Steve French3b795212008-11-13 19:45:32 +0000129 struct list_head tcp_ses_list;
130 struct list_head smb_ses_list;
Jeff Laytone7ddee92008-11-14 13:44:38 -0500131 int srv_count; /* reference counter */
Steve Frencha10faeb22005-08-22 21:38:31 -0700132 /* 15 character server name + 0x20 16th byte indicating type = srv */
Jeff Layton8ecaf672008-12-01 15:23:50 -0500133 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
Jeff Laytonc359cf32007-11-16 22:22:06 +0000134 char *hostname; /* hostname portion of UNC string */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 struct socket *ssocket;
136 union {
137 struct sockaddr_in sockAddr;
138 struct sockaddr_in6 sockAddr6;
139 } addr;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000140 wait_queue_head_t response_q;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
142 struct list_head pending_mid_q;
143 void *Server_NlsInfo; /* BB - placeholder for future NLS info */
144 unsigned short server_codepage; /* codepage for the server */
Steve French131afd02005-10-07 09:51:05 -0700145 unsigned long ip_address; /* IP addr for the server if known */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000146 enum protocolEnum protocolType;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 char versionMajor;
148 char versionMinor;
Steve French4b18f2a2008-04-29 00:06:05 +0000149 bool svlocal:1; /* local server or remote */
Steve Frenchedf1ae42008-10-29 00:47:57 +0000150 bool noblocksnd; /* use blocking sendmsg */
151 bool noautotune; /* do not autotune send buf sizes */
Steve French6a5fa2362010-01-01 01:28:43 +0000152 bool tcp_nodelay;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 atomic_t inFlight; /* number of requests on the wire to server */
Steve French131afd02005-10-07 09:51:05 -0700154#ifdef CONFIG_CIFS_STATS2
155 atomic_t inSend; /* requests trying to send */
156 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
157#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 enum statusEnum tcpStatus; /* what we think the status is */
Jeff Layton72ca5452008-12-01 07:09:36 -0500159 struct mutex srv_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 struct task_struct *tsk;
161 char server_GUID[16];
162 char secMode;
163 enum securityEnum secType;
164 unsigned int maxReq; /* Clients should submit no more */
165 /* than maxReq distinct unanswered SMBs to the server when using */
166 /* multiplexed reads or writes */
167 unsigned int maxBuf; /* maxBuf specifies the maximum */
168 /* message size the server can send or receive for non-raw SMBs */
Steve Frencheca6acf2009-02-20 05:43:09 +0000169 unsigned int max_rw; /* maxRw specifies the maximum */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 /* message size the server can send or receive for */
171 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
Steve Frencheca6acf2009-02-20 05:43:09 +0000172 unsigned int max_vcs; /* maximum number of smb sessions, at least
173 those that can be specified uniquely with
174 vcnumbers */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 char sessid[4]; /* unique token id for this session */
176 /* (returned on Negotiate */
177 int capabilities; /* allow selective disabling of caps by smb sess */
Steve Frenchde7ed552006-09-30 13:25:52 +0000178 int timeAdj; /* Adjust for difference in server time zone in sec */
Steve French1982c342005-08-17 12:38:22 -0700179 __u16 CurrentMid; /* multiplex id - rotating counter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 char cryptKey[CIFS_CRYPTO_KEY_SIZE];
Steve Frencha10faeb22005-08-22 21:38:31 -0700181 /* 16th byte of RFC1001 workstation name is always null */
Jeff Layton8ecaf672008-12-01 15:23:50 -0500182 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
Steve Frenchad009ac2005-04-28 22:41:05 -0700183 __u32 sequence_number; /* needed for CIFS PDU signature */
Steve Frenchb609f062007-07-09 07:55:14 +0000184 struct mac_key mac_signing_key;
185 char ntlmv2_hash[16];
Steve French3a5ff612006-07-14 22:37:11 +0000186 unsigned long lstrp; /* when we got last response from this server */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187};
188
189/*
190 * The following is our shortcut to user information. We surface the uid,
191 * and name. We always get the password on the fly in case it
Steve Frenchd38d8c72007-06-28 19:44:13 +0000192 * has changed. We also hang a list of sessions owned by this user off here.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 */
194struct cifsUidInfo {
195 struct list_head userList;
196 struct list_head sessionList; /* SMB sessions for this user */
197 uid_t linux_uid;
198 char user[MAX_USERNAME_SIZE + 1]; /* ascii name of user */
199 /* BB may need ptr or callback for PAM or WinBind info */
200};
201
202/*
203 * Session structure. One of these for each uid session with a particular host
204 */
205struct cifsSesInfo {
Jeff Layton14fbf502008-11-14 13:53:46 -0500206 struct list_head smb_ses_list;
Steve French3b795212008-11-13 19:45:32 +0000207 struct list_head tcon_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 struct semaphore sesSem;
Steve French39798772006-05-31 22:40:51 +0000209#if 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 struct cifsUidInfo *uidInfo; /* pointer to user info */
Steve French39798772006-05-31 22:40:51 +0000211#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 struct TCP_Server_Info *server; /* pointer to server info */
Jeff Layton14fbf502008-11-14 13:53:46 -0500213 int ses_count; /* reference counter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 enum statusEnum status;
Steve French750d1152006-06-27 06:28:30 +0000215 unsigned overrideSecFlg; /* if non-zero override global sec flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 __u16 ipc_tid; /* special tid for connection to IPC share */
217 __u16 flags;
Steve Frencheca6acf2009-02-20 05:43:09 +0000218 __u16 vcnum;
Steve Frenchad009ac2005-04-28 22:41:05 -0700219 char *serverOS; /* name of operating system underlying server */
220 char *serverNOS; /* name of network operating system of server */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 char *serverDomain; /* security realm of server */
222 int Suid; /* remote smb uid */
223 uid_t linux_uid; /* local Linux uid */
224 int capabilities;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000225 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
Steve Frenchad009ac2005-04-28 22:41:05 -0700226 TCP names - will ipv6 and sctp addresses fit? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 char userName[MAX_USERNAME_SIZE + 1];
Steve Frenchd38d8c72007-06-28 19:44:13 +0000228 char *domainName;
229 char *password;
Steve French3b795212008-11-13 19:45:32 +0000230 bool need_reconnect:1; /* connection reset, uid now invalid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231};
Steve French9ac00b72006-09-30 04:13:17 +0000232/* no more than one of the following three session flags may be set */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233#define CIFS_SES_NT4 1
Steve French9ac00b72006-09-30 04:13:17 +0000234#define CIFS_SES_OS2 2
235#define CIFS_SES_W9X 4
236/* following flag is set for old servers such as OS2 (and Win95?)
237 which do not negotiate NTLM or POSIX dialects, but instead
238 negotiate one of the older LANMAN dialects */
239#define CIFS_SES_LANMAN 8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240/*
241 * there is one of these for each connection to a resource on a particular
Steve Frenchd38d8c72007-06-28 19:44:13 +0000242 * session
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 */
244struct cifsTconInfo {
Jeff Laytonf1987b42008-11-15 11:12:47 -0500245 struct list_head tcon_list;
246 int tc_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 struct list_head openFileList;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 struct cifsSesInfo *ses; /* pointer to session associated with */
Steve French254e55e2006-06-04 05:53:15 +0000249 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 char *nativeFileSystem;
Jeff Layton00e485b2008-12-05 20:41:21 -0500251 char *password; /* for share-level security */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 __u16 tid; /* The 2 byte tree id */
253 __u16 Flags; /* optional support bits */
254 enum statusEnum tidStatus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255#ifdef CONFIG_CIFS_STATS
256 atomic_t num_smbs_sent;
257 atomic_t num_writes;
258 atomic_t num_reads;
Steve Frenchb298f222009-02-21 21:17:43 +0000259 atomic_t num_flushes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 atomic_t num_oplock_brks;
261 atomic_t num_opens;
Steve Frencha5a2b482005-08-20 21:42:53 -0700262 atomic_t num_closes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 atomic_t num_deletes;
264 atomic_t num_mkdirs;
Steve French65bc98b2009-07-10 15:27:25 +0000265 atomic_t num_posixopens;
266 atomic_t num_posixmkdirs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 atomic_t num_rmdirs;
268 atomic_t num_renames;
269 atomic_t num_t2renames;
Steve Frenchdfb75332005-06-22 17:13:47 -0700270 atomic_t num_ffirst;
271 atomic_t num_fnext;
272 atomic_t num_fclose;
Steve Frencha5a2b482005-08-20 21:42:53 -0700273 atomic_t num_hardlinks;
274 atomic_t num_symlinks;
275 atomic_t num_locks;
Steve French0a4b92c2006-01-12 15:44:21 -0800276 atomic_t num_acl_get;
277 atomic_t num_acl_set;
Steve Frencha5a2b482005-08-20 21:42:53 -0700278#ifdef CONFIG_CIFS_STATS2
279 unsigned long long time_writes;
280 unsigned long long time_reads;
281 unsigned long long time_opens;
282 unsigned long long time_deletes;
283 unsigned long long time_closes;
284 unsigned long long time_mkdirs;
285 unsigned long long time_rmdirs;
286 unsigned long long time_renames;
287 unsigned long long time_t2renames;
288 unsigned long long time_ffirst;
289 unsigned long long time_fnext;
290 unsigned long long time_fclose;
291#endif /* CONFIG_CIFS_STATS2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 __u64 bytes_read;
293 __u64 bytes_written;
294 spinlock_t stat_lock;
Steve Frencha5a2b482005-08-20 21:42:53 -0700295#endif /* CONFIG_CIFS_STATS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
Steve French254e55e2006-06-04 05:53:15 +0000297 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
Steve French4b18f2a2008-04-29 00:06:05 +0000299 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
300 bool retry:1;
301 bool nocase:1;
Steve French95b1cb92008-05-15 16:44:38 +0000302 bool seal:1; /* transport encryption for this mounted share */
Steve French4b18f2a2008-04-29 00:06:05 +0000303 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
Steve Frenchc18c8422007-07-18 23:21:09 +0000304 for this mount even if server would support */
Steve French84210e92008-10-23 04:42:37 +0000305 bool local_lease:1; /* check leases (only) on local system not remote */
Steve French64cc2c62009-03-04 19:54:08 +0000306 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
Steve French3b795212008-11-13 19:45:32 +0000307 bool need_reconnect:1; /* connection reset, tid now invalid */
Steve Frenchc18c8422007-07-18 23:21:09 +0000308 /* BB add field for back pointer to sb struct(s)? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309};
310
311/*
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000312 * This info hangs off the cifsFileInfo structure, pointed to by llist.
313 * This is used to track byte stream locks on the file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 */
315struct cifsLockInfo {
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000316 struct list_head llist; /* pointer to next cifsLockInfo */
317 __u64 offset;
318 __u64 length;
319 __u8 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320};
321
322/*
323 * One of these for each open instance of a file
324 */
325struct cifs_search_info {
326 loff_t index_of_last_entry;
327 __u16 entries_in_buffer;
328 __u16 info_level;
329 __u32 resume_key;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000330 char *ntwrk_buf_start;
331 char *srch_entries_start;
Steve French0752f152008-10-07 20:03:33 +0000332 char *last_entry;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000333 char *presume_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 unsigned int resume_name_len;
Steve French4b18f2a2008-04-29 00:06:05 +0000335 bool endOfSearch:1;
336 bool emptyDir:1;
337 bool unicode:1;
338 bool smallBuf:1; /* so we know which buf_release function to call */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339};
340
341struct cifsFileInfo {
342 struct list_head tlist; /* pointer to next fid owned by tcon */
343 struct list_head flist; /* next fid (file instance) for this inode */
344 unsigned int uid; /* allows finding which FileInfo structure */
345 __u32 pid; /* process id who opened file */
346 __u16 netfid; /* file id from remote */
347 /* BB add lock scope info here if needed */ ;
348 /* lock scope id (0 if none) */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000349 struct file *pfile; /* needed for writepage */
350 struct inode *pInode; /* needed for oplock break */
Jeff Layton3bc303c2009-09-21 06:47:50 -0400351 struct vfsmount *mnt;
Roland Dreier796e5662007-05-03 04:33:45 +0000352 struct mutex lock_mutex;
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000353 struct list_head llist; /* list of byte range locks we have. */
Steve French4b18f2a2008-04-29 00:06:05 +0000354 bool closePend:1; /* file is marked to close */
355 bool invalidHandle:1; /* file closed via session abend */
Jeff Layton3bc303c2009-09-21 06:47:50 -0400356 bool oplock_break_cancelled:1;
Dave Kleikamp6ab409b2009-08-31 11:07:12 -0400357 atomic_t count; /* reference count */
Steve Frencha6ce4932009-04-09 01:14:32 +0000358 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 struct cifs_search_info srch_inf;
Jeff Layton3bc303c2009-09-21 06:47:50 -0400360 struct slow_work oplock_break; /* slow_work job for oplock breaks */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361};
362
Dave Kleikamp6ab409b2009-08-31 11:07:12 -0400363/* Take a reference on the file private data */
364static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
365{
366 atomic_inc(&cifs_file->count);
367}
368
369/* Release a reference on the file private data */
370static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
371{
Jeff Layton48541bd2009-09-12 11:54:29 -0400372 if (atomic_dec_and_test(&cifs_file->count)) {
373 iput(cifs_file->pInode);
Dave Kleikamp6ab409b2009-08-31 11:07:12 -0400374 kfree(cifs_file);
Jeff Layton48541bd2009-09-12 11:54:29 -0400375 }
Dave Kleikamp6ab409b2009-08-31 11:07:12 -0400376}
377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378/*
379 * One of these for each file inode
380 */
381
382struct cifsInodeInfo {
383 struct list_head lockList;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000384 /* BB add in lists for dirty pages i.e. write caching info for oplock */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 struct list_head openFileList;
386 int write_behind_rc;
387 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 unsigned long time; /* jiffies of last update/check of inode */
Steve French4b18f2a2008-04-29 00:06:05 +0000389 bool clientCanCacheRead:1; /* read oplock */
390 bool clientCanCacheAll:1; /* read and writebehind oplock */
Jeff Layton9a8165f2008-10-17 21:03:20 -0400391 bool delete_pending:1; /* DELETE_ON_CLOSE is set */
Jeff Laytonfbec9ab2009-04-03 13:44:00 -0400392 u64 server_eof; /* current file size on server */
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400393 u64 uniqueid; /* server inode number */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 struct inode vfs_inode;
395};
396
397static inline struct cifsInodeInfo *
398CIFS_I(struct inode *inode)
399{
400 return container_of(inode, struct cifsInodeInfo, vfs_inode);
401}
402
403static inline struct cifs_sb_info *
404CIFS_SB(struct super_block *sb)
405{
406 return sb->s_fs_info;
407}
408
Steve Frenchab2f2182005-09-15 20:44:50 -0700409static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
Jeremy Allisonac670552005-06-22 17:26:35 -0700410{
411 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
412 return '/';
413 else
414 return '\\';
415}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
Steve Frencha4544342005-08-24 13:59:35 -0700417#ifdef CONFIG_CIFS_STATS
418#define cifs_stats_inc atomic_inc
419
420static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
421 unsigned int bytes)
422{
423 if (bytes) {
424 spin_lock(&tcon->stat_lock);
425 tcon->bytes_written += bytes;
426 spin_unlock(&tcon->stat_lock);
427 }
428}
429
430static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
431 unsigned int bytes)
432{
433 spin_lock(&tcon->stat_lock);
434 tcon->bytes_read += bytes;
435 spin_unlock(&tcon->stat_lock);
436}
437#else
438
Steve Frenchd38d8c72007-06-28 19:44:13 +0000439#define cifs_stats_inc(field) do {} while (0)
440#define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
441#define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
Steve Frencha4544342005-08-24 13:59:35 -0700442
443#endif
444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445/* one of these for every pending CIFS request to the server */
446struct mid_q_entry {
447 struct list_head qhead; /* mids waiting on reply from this server */
448 __u16 mid; /* multiplex id */
449 __u16 pid; /* process id */
450 __u32 sequence_number; /* for CIFS signing */
Steve French1047abc2005-10-11 19:58:06 -0700451 unsigned long when_alloc; /* when mid was created */
452#ifdef CONFIG_CIFS_STATS2
453 unsigned long when_sent; /* time when smb send finished */
454 unsigned long when_received; /* when demux complete (taken off wire) */
455#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 struct task_struct *tsk; /* task waiting for response */
457 struct smb_hdr *resp_buf; /* response buffer */
458 int midState; /* wish this were enum but can not pass to wait_event */
Steve Frenchc81156d2005-04-28 22:41:07 -0700459 __u8 command; /* smb command code */
Steve French4b18f2a2008-04-29 00:06:05 +0000460 bool largeBuf:1; /* if valid response, is pointer to large buf */
461 bool multiRsp:1; /* multiple trans2 responses for one request */
462 bool multiEnd:1; /* both received */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463};
464
465struct oplock_q_entry {
466 struct list_head qhead;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000467 struct inode *pinode;
468 struct cifsTconInfo *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 __u16 netfid;
470};
471
Steve Frenchff5dbd92005-08-24 17:10:36 -0700472/* for pending dnotify requests */
473struct dir_notify_req {
474 struct list_head lhead;
475 __le16 Pid;
476 __le16 PidHigh;
477 __u16 Mid;
478 __u16 Tid;
479 __u16 Uid;
480 __u16 netfid;
481 __u32 filter; /* CompletionFilter (for multishot) */
482 int multishot;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000483 struct file *pfile;
Steve Frenchff5dbd92005-08-24 17:10:36 -0700484};
485
Steve French366781c2008-01-25 10:12:41 +0000486struct dfs_info3_param {
487 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
Igor Mammedov8aad0182008-02-15 18:21:49 +0000488 int path_consumed;
Steve French366781c2008-01-25 10:12:41 +0000489 int server_type;
490 int ref_flag;
491 char *path_name;
492 char *node_name;
493};
494
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400495/*
496 * common struct for holding inode info when searching for or updating an
497 * inode with new info
498 */
499
500#define CIFS_FATTR_DFS_REFERRAL 0x1
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400501#define CIFS_FATTR_DELETE_PENDING 0x2
502#define CIFS_FATTR_NEED_REVAL 0x4
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400503
504struct cifs_fattr {
505 u32 cf_flags;
506 u32 cf_cifsattrs;
507 u64 cf_uniqueid;
508 u64 cf_eof;
509 u64 cf_bytes;
510 uid_t cf_uid;
511 gid_t cf_gid;
512 umode_t cf_mode;
513 dev_t cf_rdev;
514 unsigned int cf_nlink;
515 unsigned int cf_dtype;
516 struct timespec cf_atime;
517 struct timespec cf_mtime;
518 struct timespec cf_ctime;
519};
520
Steve French366781c2008-01-25 10:12:41 +0000521static inline void free_dfs_info_param(struct dfs_info3_param *param)
522{
523 if (param) {
524 kfree(param->path_name);
525 kfree(param->node_name);
526 kfree(param);
527 }
528}
529
530static inline void free_dfs_info_array(struct dfs_info3_param *param,
531 int number_of_items)
532{
533 int i;
534 if ((number_of_items == 0) || (param == NULL))
535 return;
536 for (i = 0; i < number_of_items; i++) {
537 kfree(param[i].path_name);
538 kfree(param[i].node_name);
539 }
540 kfree(param);
541}
542
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543#define MID_FREE 0
544#define MID_REQUEST_ALLOCATED 1
545#define MID_REQUEST_SUBMITTED 2
546#define MID_RESPONSE_RECEIVED 4
547#define MID_RETRY_NEEDED 8 /* session closed while this request out */
548#define MID_NO_RESP_NEEDED 0x10
Steve Frenchec637e32005-12-12 20:53:18 -0800549
550/* Types of response buffer returned from SendReceive2 */
551#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
552#define CIFS_SMALL_BUFFER 1
553#define CIFS_LARGE_BUFFER 2
554#define CIFS_IOVEC 4 /* array of response buffers */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
Steve French133672e2007-11-13 22:41:37 +0000556/* Type of Request to SendReceive2 */
557#define CIFS_STD_OP 0 /* normal request timeout */
558#define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
559#define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
560#define CIFS_BLOCKING_OP 4 /* operation can block */
561#define CIFS_ASYNC_OP 8 /* do not wait for response */
562#define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
563#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
564#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
565#define CIFS_NO_RESP 0x040 /* no response buffer required */
566
Steve French39798772006-05-31 22:40:51 +0000567/* Security Flags: indicate type of session setup needed */
568#define CIFSSEC_MAY_SIGN 0x00001
569#define CIFSSEC_MAY_NTLM 0x00002
570#define CIFSSEC_MAY_NTLMV2 0x00004
571#define CIFSSEC_MAY_KRB5 0x00008
572#ifdef CONFIG_CIFS_WEAK_PW_HASH
573#define CIFSSEC_MAY_LANMAN 0x00010
574#define CIFSSEC_MAY_PLNTXT 0x00020
Steve French516897a2007-10-12 19:24:06 +0000575#else
576#define CIFSSEC_MAY_LANMAN 0
577#define CIFSSEC_MAY_PLNTXT 0
Steve French39798772006-05-31 22:40:51 +0000578#endif /* weak passwords */
579#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
Steve Frenchac683922009-05-06 04:16:04 +0000580#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
Steve French5815449d2006-02-14 01:36:20 +0000581
Steve French39798772006-05-31 22:40:51 +0000582#define CIFSSEC_MUST_SIGN 0x01001
583/* note that only one of the following can be set so the
584result of setting MUST flags more than once will be to
585require use of the stronger protocol */
586#define CIFSSEC_MUST_NTLM 0x02002
587#define CIFSSEC_MUST_NTLMV2 0x04004
588#define CIFSSEC_MUST_KRB5 0x08008
589#ifdef CONFIG_CIFS_WEAK_PW_HASH
590#define CIFSSEC_MUST_LANMAN 0x10010
591#define CIFSSEC_MUST_PLNTXT 0x20020
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000592#ifdef CONFIG_CIFS_UPCALL
Chuck Ebbert20d17522009-09-15 01:53:21 -0400593#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000594#else
Chuck Ebbert20d17522009-09-15 01:53:21 -0400595#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
Steve French016ec752007-10-16 18:10:10 +0000596#endif /* UPCALL */
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000597#else /* do not allow weak pw hash */
598#ifdef CONFIG_CIFS_UPCALL
Steve Frenchac683922009-05-06 04:16:04 +0000599#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000600#else
Steve Frenchac683922009-05-06 04:16:04 +0000601#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
Steve French016ec752007-10-16 18:10:10 +0000602#endif /* UPCALL */
Steve French39798772006-05-31 22:40:51 +0000603#endif /* WEAK_PW_HASH */
604#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
Steve Frenchac683922009-05-06 04:16:04 +0000605#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
Steve French39798772006-05-31 22:40:51 +0000606
Shirish Pargaonkaref571ca2008-07-24 15:56:05 +0000607#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
608#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
Steve Frenchac683922009-05-06 04:16:04 +0000609#define CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610/*
611 *****************************************************************
612 * All constants go here
613 *****************************************************************
614 */
615
616#define UID_HASH (16)
617
618/*
619 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
620 * following to be declared.
621 */
622
623/****************************************************************************
624 * Locking notes. All updates to global variables and lists should be
625 * protected by spinlocks or semaphores.
626 *
627 * Spinlocks
628 * ---------
629 * GlobalMid_Lock protects:
630 * list operations on pending_mid_q and oplockQ
631 * updates to XID counters, multiplex id and SMB sequence numbers
632 * GlobalSMBSesLock protects:
633 * list operations on tcp and SMB session lists and tCon lists
634 * f_owner.lock protects certain per file struct operations
635 * mapping->page_lock protects certain per page operations
636 *
637 * Semaphores
638 * ----------
639 * sesSem operations on smb session
640 * tconSem operations on tree connection
Steve Frenchd38d8c72007-06-28 19:44:13 +0000641 * fh_sem file handle reconnection operations
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 *
643 ****************************************************************************/
644
645#ifdef DECLARE_GLOBALS_HERE
646#define GLOBAL_EXTERN
647#else
648#define GLOBAL_EXTERN extern
649#endif
650
Jeff Laytone7ddee92008-11-14 13:44:38 -0500651/*
652 * the list of TCP_Server_Info structures, ie each of the sockets
Steve Frenchfb396012008-11-13 20:04:07 +0000653 * connecting our client to a distinct server (ip address), is
Jeff Laytone7ddee92008-11-14 13:44:38 -0500654 * chained together by cifs_tcp_ses_list. The list of all our SMB
Steve Frenchfb396012008-11-13 20:04:07 +0000655 * sessions (and from that the tree connections) can be found
Jeff Laytone7ddee92008-11-14 13:44:38 -0500656 * by iterating over cifs_tcp_ses_list
657 */
658GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
659
Jeff Laytonf1987b42008-11-15 11:12:47 -0500660/*
661 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
662 * tcp session, and the list of tcon's per smb session. It also protects
663 * the reference counters for the server, smb session, and tcon. Finally,
664 * changes to the tcon->tidStatus should be done while holding this lock.
665 */
Jeff Laytone7ddee92008-11-14 13:44:38 -0500666GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock;
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000667
668/*
669 * This lock protects the cifs_file->llist and cifs_file->flist
670 * list operations, and updates to some flags (cifs_file->invalidHandle)
671 * It will be moved to either use the tcon->stat_lock or equivalent later.
672 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
673 * the cifs_tcp_ses_lock must be grabbed first and released last.
674 */
675GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676
Steve French99ee4db2007-02-27 05:35:17 +0000677/* Outstanding dir notify requests */
678GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
679/* DirNotify response queue */
680GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
Steve Frenchff5dbd92005-08-24 17:10:36 -0700681
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682/*
683 * Global transaction id (XID) information
684 */
685GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +0000686GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +0000688GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
689 /* on midQ entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690GLOBAL_EXTERN char Local_System_Name[15];
691
692/*
693 * Global counters, updated atomically
694 */
695GLOBAL_EXTERN atomic_t sesInfoAllocCount;
696GLOBAL_EXTERN atomic_t tconInfoAllocCount;
697GLOBAL_EXTERN atomic_t tcpSesAllocCount;
698GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
699GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
700
Steve Frenchaaa9bbe2008-05-23 17:38:32 +0000701/* Various Debug counters */
Steve French4498eed2005-12-03 13:58:57 -0800702GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
703#ifdef CONFIG_CIFS_STATS2
704GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
705GLOBAL_EXTERN atomic_t totSmBufAllocCount;
706#endif
707GLOBAL_EXTERN atomic_t smBufAllocCount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708GLOBAL_EXTERN atomic_t midCount;
709
710/* Misc globals */
Steve French254e55e2006-06-04 05:53:15 +0000711GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 to be established on existing mount if we
Steve Frenchd38d8c72007-06-28 19:44:13 +0000713 have the uid/password or Kerberos credential
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 or equivalent for current user */
715GLOBAL_EXTERN unsigned int oplockEnabled;
716GLOBAL_EXTERN unsigned int experimEnabled;
717GLOBAL_EXTERN unsigned int lookupCacheEnabled;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000718GLOBAL_EXTERN unsigned int extended_security; /* if on, session setup sent
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 with more secure ntlmssp2 challenge/resp */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
722GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
723GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
724GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
725GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
726
Jeff Layton3bc303c2009-09-21 06:47:50 -0400727extern const struct slow_work_ops cifs_oplock_break_ops;