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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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090021#include <linux/slab.h>
Jeff Layton3bc303c2009-09-21 06:47:50 -040022#include <linux/slow-work.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include "cifs_fs_sb.h"
Steve French442aa312007-09-24 20:25:46 +000024#include "cifsacl.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025/*
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
Shirish Pargaonkaref571ca2008-07-24 15:56:05 +000032#define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#define MAX_SERVER_SIZE 15
Steve Frenchd38d8c72007-06-28 19:44:13 +000034#define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#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
André Goddard Rosaaf901ca2009-11-14 13:09:05 -020043 * on one socket concurrently. It also matches the most common
Steve Frenchd38d8c72007-06-28 19:44:13 +000044 * value of max multiplex returned by servers. We may
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 * 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 */
Steve Frenchd38d8c72007-06-28 19:44:13 +000050#define CIFS_MAX_REQ 50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Jeff Layton8ecaf672008-12-01 15:23:50 -050052#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070057#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070066#ifndef XATTR_DOS_ATTRIB
67#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
68#endif
69
70/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 * 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 {
Steve Frencha0136892007-10-04 20:05:09 +000083 PLAINTXT = 0, /* Legacy with Plaintext passwords */
84 LANMAN, /* Legacy LANMAN auth */
Steve French39798772006-05-31 22:40:51 +000085 NTLM, /* Legacy NTLM012 auth with NTLM hash */
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
Steve Frenchac683922009-05-06 04:16:04 +000087 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
Steve Frenchf46c7232009-06-25 03:04:20 +000088/* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
Steve Frenchc16fefa2008-08-19 19:35:33 +000089 Kerberos, /* Kerberos via SPNEGO */
90 MSKerberos, /* MS Kerberos via SPNEGO */
Linus Torvalds1da177e2005-04-16 15:20:36 -070091};
92
93enum protocolEnum {
Steve French3ec332e2008-11-14 03:35:10 +000094 TCP = 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 SCTP
96 /* Netbios frames protocol not supported at this time */
97};
98
Steve Frenchb609f062007-07-09 07:55:14 +000099struct mac_key {
100 unsigned int len;
101 union {
102 char ntlm[CIFS_SESS_KEY_SIZE + 16];
Steve French24424212007-11-16 23:37:35 +0000103 char krb5[CIFS_SESS_KEY_SIZE + 16]; /* BB: length correct? */
Steve Frenchb609f062007-07-09 07:55:14 +0000104 struct {
105 char key[16];
106 struct ntlmv2_resp resp;
107 } ntlmv2;
108 } data;
109};
110
Steve French442aa312007-09-24 20:25:46 +0000111struct 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122/*
123 *****************************************************************
124 * Except the CIFS PDUs themselves all the
125 * globally interesting structs should go here
126 *****************************************************************
127 */
128
129struct TCP_Server_Info {
Steve French3b795212008-11-13 19:45:32 +0000130 struct list_head tcp_ses_list;
131 struct list_head smb_ses_list;
Jeff Laytone7ddee92008-11-14 13:44:38 -0500132 int srv_count; /* reference counter */
Steve Frencha10faeb22005-08-22 21:38:31 -0700133 /* 15 character server name + 0x20 16th byte indicating type = srv */
Jeff Layton8ecaf672008-12-01 15:23:50 -0500134 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
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;
Steve French4b18f2a2008-04-29 00:06:05 +0000150 bool svlocal:1; /* local server or remote */
Steve Frenchedf1ae42008-10-29 00:47:57 +0000151 bool noblocksnd; /* use blocking sendmsg */
152 bool noautotune; /* do not autotune send buf sizes */
Steve French6a5fa2362010-01-01 01:28:43 +0000153 bool tcp_nodelay;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 atomic_t inFlight; /* number of requests on the wire to server */
Steve French131afd0b2005-10-07 09:51:05 -0700155#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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 enum statusEnum tcpStatus; /* what we think the status is */
Jeff Layton72ca5452008-12-01 07:09:36 -0500160 struct mutex srv_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 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 */
Steve Frencheca6acf2009-02-20 05:43:09 +0000170 unsigned int max_rw; /* maxRw specifies the maximum */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 /* message size the server can send or receive for */
172 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
Steve Frencheca6acf2009-02-20 05:43:09 +0000173 unsigned int max_vcs; /* maximum number of smb sessions, at least
174 those that can be specified uniquely with
175 vcnumbers */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 char sessid[4]; /* unique token id for this session */
177 /* (returned on Negotiate */
178 int capabilities; /* allow selective disabling of caps by smb sess */
Steve Frenchde7ed552006-09-30 13:25:52 +0000179 int timeAdj; /* Adjust for difference in server time zone in sec */
Steve French1982c342005-08-17 12:38:22 -0700180 __u16 CurrentMid; /* multiplex id - rotating counter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 char cryptKey[CIFS_CRYPTO_KEY_SIZE];
Steve Frencha10faeb22005-08-22 21:38:31 -0700182 /* 16th byte of RFC1001 workstation name is always null */
Jeff Layton8ecaf672008-12-01 15:23:50 -0500183 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
Steve Frenchad009ac2005-04-28 22:41:05 -0700184 __u32 sequence_number; /* needed for CIFS PDU signature */
Steve Frenchb609f062007-07-09 07:55:14 +0000185 struct mac_key mac_signing_key;
186 char ntlmv2_hash[16];
Steve French3a5ff612006-07-14 22:37:11 +0000187 unsigned long lstrp; /* when we got last response from this server */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188};
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
Steve Frenchd38d8c72007-06-28 19:44:13 +0000193 * has changed. We also hang a list of sessions owned by this user off here.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 */
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 {
Jeff Layton14fbf502008-11-14 13:53:46 -0500207 struct list_head smb_ses_list;
Steve French3b795212008-11-13 19:45:32 +0000208 struct list_head tcon_list;
Steve Frenchd7b619c2010-02-25 05:36:46 +0000209 struct mutex session_mutex;
Steve French39798772006-05-31 22:40:51 +0000210#if 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 struct cifsUidInfo *uidInfo; /* pointer to user info */
Steve French39798772006-05-31 22:40:51 +0000212#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 struct TCP_Server_Info *server; /* pointer to server info */
Jeff Layton14fbf502008-11-14 13:53:46 -0500214 int ses_count; /* reference counter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 enum statusEnum status;
Steve French750d1152006-06-27 06:28:30 +0000216 unsigned overrideSecFlg; /* if non-zero override global sec flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 __u16 ipc_tid; /* special tid for connection to IPC share */
218 __u16 flags;
Steve Frencheca6acf2009-02-20 05:43:09 +0000219 __u16 vcnum;
Steve Frenchad009ac2005-04-28 22:41:05 -0700220 char *serverOS; /* name of operating system underlying server */
221 char *serverNOS; /* name of network operating system of server */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 char *serverDomain; /* security realm of server */
223 int Suid; /* remote smb uid */
224 uid_t linux_uid; /* local Linux uid */
225 int capabilities;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000226 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
Steve Frenchad009ac2005-04-28 22:41:05 -0700227 TCP names - will ipv6 and sctp addresses fit? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 char userName[MAX_USERNAME_SIZE + 1];
Steve Frenchd38d8c72007-06-28 19:44:13 +0000229 char *domainName;
230 char *password;
Steve French3b795212008-11-13 19:45:32 +0000231 bool need_reconnect:1; /* connection reset, uid now invalid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232};
Steve French9ac00b72006-09-30 04:13:17 +0000233/* no more than one of the following three session flags may be set */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234#define CIFS_SES_NT4 1
Steve French9ac00b72006-09-30 04:13:17 +0000235#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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241/*
242 * there is one of these for each connection to a resource on a particular
Steve Frenchd38d8c72007-06-28 19:44:13 +0000243 * session
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 */
245struct cifsTconInfo {
Jeff Laytonf1987b42008-11-15 11:12:47 -0500246 struct list_head tcon_list;
247 int tc_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 struct list_head openFileList;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 struct cifsSesInfo *ses; /* pointer to session associated with */
Steve French254e55e2006-06-04 05:53:15 +0000250 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 char *nativeFileSystem;
Jeff Layton00e485b2008-12-05 20:41:21 -0500252 char *password; /* for share-level security */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 __u16 tid; /* The 2 byte tree id */
254 __u16 Flags; /* optional support bits */
255 enum statusEnum tidStatus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256#ifdef CONFIG_CIFS_STATS
257 atomic_t num_smbs_sent;
258 atomic_t num_writes;
259 atomic_t num_reads;
Steve Frenchb298f222009-02-21 21:17:43 +0000260 atomic_t num_flushes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 atomic_t num_oplock_brks;
262 atomic_t num_opens;
Steve Frencha5a2b482005-08-20 21:42:53 -0700263 atomic_t num_closes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 atomic_t num_deletes;
265 atomic_t num_mkdirs;
Steve French65bc98b2009-07-10 15:27:25 +0000266 atomic_t num_posixopens;
267 atomic_t num_posixmkdirs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 atomic_t num_rmdirs;
269 atomic_t num_renames;
270 atomic_t num_t2renames;
Steve Frenchdfb75332005-06-22 17:13:47 -0700271 atomic_t num_ffirst;
272 atomic_t num_fnext;
273 atomic_t num_fclose;
Steve Frencha5a2b482005-08-20 21:42:53 -0700274 atomic_t num_hardlinks;
275 atomic_t num_symlinks;
276 atomic_t num_locks;
Steve French0a4b92c2006-01-12 15:44:21 -0800277 atomic_t num_acl_get;
278 atomic_t num_acl_set;
Steve Frencha5a2b482005-08-20 21:42:53 -0700279#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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 __u64 bytes_read;
294 __u64 bytes_written;
295 spinlock_t stat_lock;
Steve Frencha5a2b482005-08-20 21:42:53 -0700296#endif /* CONFIG_CIFS_STATS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
Steve French254e55e2006-06-04 05:53:15 +0000298 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
Steve French4b18f2a2008-04-29 00:06:05 +0000300 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
301 bool retry:1;
302 bool nocase:1;
Steve French95b1cb92008-05-15 16:44:38 +0000303 bool seal:1; /* transport encryption for this mounted share */
Steve French4b18f2a2008-04-29 00:06:05 +0000304 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
Steve Frenchc18c8422007-07-18 23:21:09 +0000305 for this mount even if server would support */
Steve French84210e92008-10-23 04:42:37 +0000306 bool local_lease:1; /* check leases (only) on local system not remote */
Steve French64cc2c62009-03-04 19:54:08 +0000307 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
Steve French3b795212008-11-13 19:45:32 +0000308 bool need_reconnect:1; /* connection reset, tid now invalid */
Steve Frenchc18c8422007-07-18 23:21:09 +0000309 /* BB add field for back pointer to sb struct(s)? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310};
311
312/*
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000313 * This info hangs off the cifsFileInfo structure, pointed to by llist.
314 * This is used to track byte stream locks on the file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 */
316struct cifsLockInfo {
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000317 struct list_head llist; /* pointer to next cifsLockInfo */
318 __u64 offset;
319 __u64 length;
320 __u8 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321};
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;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000331 char *ntwrk_buf_start;
332 char *srch_entries_start;
Steve French0752f152008-10-07 20:03:33 +0000333 char *last_entry;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000334 char *presume_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 unsigned int resume_name_len;
Steve French4b18f2a2008-04-29 00:06:05 +0000336 bool endOfSearch:1;
337 bool emptyDir:1;
338 bool unicode:1;
339 bool smallBuf:1; /* so we know which buf_release function to call */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340};
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) */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000350 struct file *pfile; /* needed for writepage */
351 struct inode *pInode; /* needed for oplock break */
Jeff Layton3bc303c2009-09-21 06:47:50 -0400352 struct vfsmount *mnt;
Roland Dreier796e5662007-05-03 04:33:45 +0000353 struct mutex lock_mutex;
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000354 struct list_head llist; /* list of byte range locks we have. */
Steve French4b18f2a2008-04-29 00:06:05 +0000355 bool closePend:1; /* file is marked to close */
356 bool invalidHandle:1; /* file closed via session abend */
Jeff Layton3bc303c2009-09-21 06:47:50 -0400357 bool oplock_break_cancelled:1;
Dave Kleikamp6ab409b2009-08-31 11:07:12 -0400358 atomic_t count; /* reference count */
Steve Frencha6ce4932009-04-09 01:14:32 +0000359 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 struct cifs_search_info srch_inf;
Jeff Layton3bc303c2009-09-21 06:47:50 -0400361 struct slow_work oplock_break; /* slow_work job for oplock breaks */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362};
363
Dave Kleikamp6ab409b2009-08-31 11:07:12 -0400364/* 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{
Jeff Layton48541bd2009-09-12 11:54:29 -0400373 if (atomic_dec_and_test(&cifs_file->count)) {
374 iput(cifs_file->pInode);
Dave Kleikamp6ab409b2009-08-31 11:07:12 -0400375 kfree(cifs_file);
Jeff Layton48541bd2009-09-12 11:54:29 -0400376 }
Dave Kleikamp6ab409b2009-08-31 11:07:12 -0400377}
378
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379/*
380 * One of these for each file inode
381 */
382
383struct cifsInodeInfo {
384 struct list_head lockList;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000385 /* BB add in lists for dirty pages i.e. write caching info for oplock */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 struct list_head openFileList;
387 int write_behind_rc;
388 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 unsigned long time; /* jiffies of last update/check of inode */
Steve French4b18f2a2008-04-29 00:06:05 +0000390 bool clientCanCacheRead:1; /* read oplock */
391 bool clientCanCacheAll:1; /* read and writebehind oplock */
Jeff Layton9a8165f2008-10-17 21:03:20 -0400392 bool delete_pending:1; /* DELETE_ON_CLOSE is set */
Jeff Laytondf2cf172010-02-12 07:44:16 -0500393 bool invalid_mapping:1; /* pagecache is invalid */
Jeff Laytonfbec9ab2009-04-03 13:44:00 -0400394 u64 server_eof; /* current file size on server */
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400395 u64 uniqueid; /* server inode number */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 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
Steve Frenchab2f2182005-09-15 20:44:50 -0700411static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
Jeremy Allisonac670552005-06-22 17:26:35 -0700412{
413 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
414 return '/';
415 else
416 return '\\';
417}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
Steve Frencha4544342005-08-24 13:59:35 -0700419#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
Steve Frenchd38d8c72007-06-28 19:44:13 +0000441#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)
Steve Frencha4544342005-08-24 13:59:35 -0700444
445#endif
446
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447/* 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 */
Steve French1047abc2005-10-11 19:58:06 -0700453 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 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 */
Steve Frenchc81156d2005-04-28 22:41:07 -0700461 __u8 command; /* smb command code */
Steve French4b18f2a2008-04-29 00:06:05 +0000462 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465};
466
467struct oplock_q_entry {
468 struct list_head qhead;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000469 struct inode *pinode;
470 struct cifsTconInfo *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 __u16 netfid;
472};
473
Steve Frenchff5dbd92005-08-24 17:10:36 -0700474/* 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;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000485 struct file *pfile;
Steve Frenchff5dbd92005-08-24 17:10:36 -0700486};
487
Steve French366781c2008-01-25 10:12:41 +0000488struct dfs_info3_param {
489 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
Igor Mammedov8aad0182008-02-15 18:21:49 +0000490 int path_consumed;
Steve French366781c2008-01-25 10:12:41 +0000491 int server_type;
492 int ref_flag;
493 char *path_name;
494 char *node_name;
495};
496
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400497/*
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
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400503#define CIFS_FATTR_DELETE_PENDING 0x2
504#define CIFS_FATTR_NEED_REVAL 0x4
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400505
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
Steve French366781c2008-01-25 10:12:41 +0000523static 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545#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
Steve Frenchec637e32005-12-12 20:53:18 -0800551
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
Steve French133672e2007-11-13 22:41:37 +0000558/* 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
Steve French39798772006-05-31 22:40:51 +0000569/* 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
Steve French516897a2007-10-12 19:24:06 +0000577#else
578#define CIFSSEC_MAY_LANMAN 0
579#define CIFSSEC_MAY_PLNTXT 0
Steve French39798772006-05-31 22:40:51 +0000580#endif /* weak passwords */
581#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
Steve Frenchac683922009-05-06 04:16:04 +0000582#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
Steve French5815449d2006-02-14 01:36:20 +0000583
Steve French39798772006-05-31 22:40:51 +0000584#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
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000594#ifdef CONFIG_CIFS_UPCALL
Chuck Ebbert20d17522009-09-15 01:53:21 -0400595#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000596#else
Chuck Ebbert20d17522009-09-15 01:53:21 -0400597#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
Steve French016ec752007-10-16 18:10:10 +0000598#endif /* UPCALL */
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000599#else /* do not allow weak pw hash */
600#ifdef CONFIG_CIFS_UPCALL
Steve Frenchac683922009-05-06 04:16:04 +0000601#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000602#else
Steve Frenchac683922009-05-06 04:16:04 +0000603#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
Steve French016ec752007-10-16 18:10:10 +0000604#endif /* UPCALL */
Steve French39798772006-05-31 22:40:51 +0000605#endif /* WEAK_PW_HASH */
606#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
Steve Frenchac683922009-05-06 04:16:04 +0000607#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
Steve French39798772006-05-31 22:40:51 +0000608
Shirish Pargaonkaref571ca2008-07-24 15:56:05 +0000609#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
610#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
Steve Frenchac683922009-05-06 04:16:04 +0000611#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 -0700612/*
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
Steve Frenchd38d8c72007-06-28 19:44:13 +0000643 * fh_sem file handle reconnection operations
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 *
645 ****************************************************************************/
646
647#ifdef DECLARE_GLOBALS_HERE
648#define GLOBAL_EXTERN
649#else
650#define GLOBAL_EXTERN extern
651#endif
652
Jeff Laytone7ddee92008-11-14 13:44:38 -0500653/*
654 * the list of TCP_Server_Info structures, ie each of the sockets
Steve Frenchfb396012008-11-13 20:04:07 +0000655 * connecting our client to a distinct server (ip address), is
Jeff Laytone7ddee92008-11-14 13:44:38 -0500656 * chained together by cifs_tcp_ses_list. The list of all our SMB
Steve Frenchfb396012008-11-13 20:04:07 +0000657 * sessions (and from that the tree connections) can be found
Jeff Laytone7ddee92008-11-14 13:44:38 -0500658 * by iterating over cifs_tcp_ses_list
659 */
660GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
661
Jeff Laytonf1987b42008-11-15 11:12:47 -0500662/*
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 */
Jeff Laytone7ddee92008-11-14 13:44:38 -0500668GLOBAL_EXTERN rwlock_t cifs_tcp_ses_lock;
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000669
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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
Steve French99ee4db2007-02-27 05:35:17 +0000679/* Outstanding dir notify requests */
680GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
681/* DirNotify response queue */
682GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
Steve Frenchff5dbd92005-08-24 17:10:36 -0700683
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684/*
685 * Global transaction id (XID) information
686 */
687GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +0000688GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +0000690GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
691 /* on midQ entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692GLOBAL_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
Steve Frenchaaa9bbe2008-05-23 17:38:32 +0000703/* Various Debug counters */
Steve French4498eed52005-12-03 13:58:57 -0800704GLOBAL_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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710GLOBAL_EXTERN atomic_t midCount;
711
712/* Misc globals */
Steve French254e55e2006-06-04 05:53:15 +0000713GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 to be established on existing mount if we
Steve Frenchd38d8c72007-06-28 19:44:13 +0000715 have the uid/password or Kerberos credential
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 or equivalent for current user */
717GLOBAL_EXTERN unsigned int oplockEnabled;
718GLOBAL_EXTERN unsigned int experimEnabled;
719GLOBAL_EXTERN unsigned int lookupCacheEnabled;
Jeff Layton04912d62010-04-24 07:57:45 -0400720GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 with more secure ntlmssp2 challenge/resp */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723GLOBAL_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
Jeff Layton3bc303c2009-09-21 06:47:50 -0400729extern const struct slow_work_ops cifs_oplock_break_ops;