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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 */
Suresh Jayaramanabd2e442010-06-22 20:52:50 +053019#ifndef _CIFS_GLOB_H
20#define _CIFS_GLOB_H
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/in.h>
23#include <linux/in6.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090024#include <linux/slab.h>
Tejun Heo9b646972010-07-20 22:09:02 +020025#include <linux/workqueue.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "cifs_fs_sb.h"
Steve French442aa312007-09-24 20:25:46 +000027#include "cifsacl.h"
Shirish Pargaonkard2b91522010-10-21 14:25:08 -050028#include <crypto/internal/hash.h>
29#include <linux/scatterlist.h>
30
Linus Torvalds1da177e2005-04-16 15:20:36 -070031/*
32 * The sizes of various internal tables and strings
33 */
34#define MAX_UID_INFO 16
35#define MAX_SES_INFO 2
36#define MAX_TCON_INFO 4
37
Shirish Pargaonkaref571ca2008-07-24 15:56:05 +000038#define MAX_TREE_SIZE (2 + MAX_SERVER_SIZE + 1 + MAX_SHARE_SIZE + 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#define MAX_SERVER_SIZE 15
Steve Frenchd38d8c72007-06-28 19:44:13 +000040#define MAX_SHARE_SIZE 64 /* used to be 20, this should still be enough */
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#define MAX_USERNAME_SIZE 32 /* 32 is to allow for 15 char names + null
42 termination then *2 for unicode versions */
Jeff Layton4ff67b72010-07-06 20:43:02 -040043#define MAX_PASSWORD_SIZE 512 /* max for windows seems to be 256 wide chars */
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45#define CIFS_MIN_RCV_POOL 4
46
47/*
48 * MAX_REQ is the maximum number of requests that WE will send
André Goddard Rosaaf901ca2009-11-14 13:09:05 -020049 * on one socket concurrently. It also matches the most common
Steve Frenchd38d8c72007-06-28 19:44:13 +000050 * value of max multiplex returned by servers. We may
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 * eventually want to use the negotiated value (in case
52 * future servers can handle more) when we are more confident that
53 * we will not have problems oveloading the socket with pending
54 * write data.
55 */
Steve Frenchd38d8c72007-06-28 19:44:13 +000056#define CIFS_MAX_REQ 50
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
Jeff Layton8ecaf672008-12-01 15:23:50 -050058#define RFC1001_NAME_LEN 15
59#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
60
61/* currently length of NIP6_FMT */
62#define SERVER_NAME_LENGTH 40
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
64
65/* used to define string lengths for reversing unicode strings */
66/* (256+1)*2 = 514 */
67/* (max path length + 1 for null) * 2 for unicode */
68#define MAX_NAME 514
69
70#include "cifspdu.h"
71
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#ifndef XATTR_DOS_ATTRIB
73#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
74#endif
75
76/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 * CIFS vfs client Status information (based on what we know.)
78 */
79
Steve French6c0f6212010-10-23 16:51:40 +000080/* associated with each tcp and smb session */
Linus Torvalds1da177e2005-04-16 15:20:36 -070081enum statusEnum {
82 CifsNew = 0,
83 CifsGood,
84 CifsExiting,
85 CifsNeedReconnect
86};
87
88enum securityEnum {
Jeff Laytondaf5b0b2010-07-06 20:43:02 -040089 LANMAN = 0, /* Legacy LANMAN auth */
Steve French39798772006-05-31 22:40:51 +000090 NTLM, /* Legacy NTLM012 auth with NTLM hash */
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
Steve Frenchac683922009-05-06 04:16:04 +000092 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
Steve Frenchf46c7232009-06-25 03:04:20 +000093/* NTLMSSP, */ /* can use rawNTLMSSP instead of NTLMSSP via SPNEGO */
Steve Frenchc16fefa2008-08-19 19:35:33 +000094 Kerberos, /* Kerberos via SPNEGO */
Linus Torvalds1da177e2005-04-16 15:20:36 -070095};
96
97enum protocolEnum {
Steve French3ec332e2008-11-14 03:35:10 +000098 TCP = 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 SCTP
100 /* Netbios frames protocol not supported at this time */
101};
102
Shirish Pargaonkar5f98ca92010-09-18 22:01:58 -0500103struct session_key {
Steve Frenchb609f062007-07-09 07:55:14 +0000104 unsigned int len;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500105 char *response;
Steve Frenchb609f062007-07-09 07:55:14 +0000106};
107
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500108/* crypto security descriptor definition */
109struct sdesc {
110 struct shash_desc shash;
111 char ctx[];
112};
113
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -0500114/* crypto hashing related structure/fields, not specific to a sec mech */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500115struct cifs_secmech {
116 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
117 struct crypto_shash *md5; /* md5 hash function */
118 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
119 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
120};
121
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500122/* per smb session structure/fields */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500123struct ntlmssp_auth {
124 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
125 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
126 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500127 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500128};
129
Steve French442aa312007-09-24 20:25:46 +0000130struct cifs_cred {
131 int uid;
132 int gid;
133 int mode;
134 int cecount;
135 struct cifs_sid osid;
136 struct cifs_sid gsid;
137 struct cifs_ntace *ntaces;
138 struct cifs_ace *aces;
139};
140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141/*
142 *****************************************************************
143 * Except the CIFS PDUs themselves all the
144 * globally interesting structs should go here
145 *****************************************************************
146 */
147
148struct TCP_Server_Info {
Steve French3b795212008-11-13 19:45:32 +0000149 struct list_head tcp_ses_list;
150 struct list_head smb_ses_list;
Jeff Laytone7ddee92008-11-14 13:44:38 -0500151 int srv_count; /* reference counter */
Steve Frencha10faeb22005-08-22 21:38:31 -0700152 /* 15 character server name + 0x20 16th byte indicating type = srv */
Jeff Layton8ecaf672008-12-01 15:23:50 -0500153 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
Jeff Laytonc359cf32007-11-16 22:22:06 +0000154 char *hostname; /* hostname portion of UNC string */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 struct socket *ssocket;
156 union {
157 struct sockaddr_in sockAddr;
158 struct sockaddr_in6 sockAddr6;
159 } addr;
Ben Greear3eb9a882010-09-01 17:06:02 -0700160 struct sockaddr_storage srcaddr; /* locally bind to this IP */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000161 wait_queue_head_t response_q;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
163 struct list_head pending_mid_q;
164 void *Server_NlsInfo; /* BB - placeholder for future NLS info */
165 unsigned short server_codepage; /* codepage for the server */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000166 enum protocolEnum protocolType;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 char versionMajor;
168 char versionMinor;
Steve French4b18f2a2008-04-29 00:06:05 +0000169 bool svlocal:1; /* local server or remote */
Steve Frenchedf1ae42008-10-29 00:47:57 +0000170 bool noblocksnd; /* use blocking sendmsg */
171 bool noautotune; /* do not autotune send buf sizes */
Steve French6a5fa2362010-01-01 01:28:43 +0000172 bool tcp_nodelay;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 atomic_t inFlight; /* number of requests on the wire to server */
Steve French131afd0b2005-10-07 09:51:05 -0700174#ifdef CONFIG_CIFS_STATS2
175 atomic_t inSend; /* requests trying to send */
176 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
177#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 enum statusEnum tcpStatus; /* what we think the status is */
Jeff Layton72ca5452008-12-01 07:09:36 -0500179 struct mutex srv_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 struct task_struct *tsk;
181 char server_GUID[16];
182 char secMode;
183 enum securityEnum secType;
184 unsigned int maxReq; /* Clients should submit no more */
185 /* than maxReq distinct unanswered SMBs to the server when using */
186 /* multiplexed reads or writes */
187 unsigned int maxBuf; /* maxBuf specifies the maximum */
188 /* message size the server can send or receive for non-raw SMBs */
Steve Frencheca6acf2009-02-20 05:43:09 +0000189 unsigned int max_rw; /* maxRw specifies the maximum */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 /* message size the server can send or receive for */
191 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
Steve Frencheca6acf2009-02-20 05:43:09 +0000192 unsigned int max_vcs; /* maximum number of smb sessions, at least
193 those that can be specified uniquely with
194 vcnumbers */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 char sessid[4]; /* unique token id for this session */
196 /* (returned on Negotiate */
197 int capabilities; /* allow selective disabling of caps by smb sess */
Steve Frenchde7ed552006-09-30 13:25:52 +0000198 int timeAdj; /* Adjust for difference in server time zone in sec */
Steve French1982c342005-08-17 12:38:22 -0700199 __u16 CurrentMid; /* multiplex id - rotating counter */
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -0500200 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
Steve Frencha10faeb22005-08-22 21:38:31 -0700201 /* 16th byte of RFC1001 workstation name is always null */
Jeff Layton8ecaf672008-12-01 15:23:50 -0500202 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
Steve Frenchad009ac2005-04-28 22:41:05 -0700203 __u32 sequence_number; /* needed for CIFS PDU signature */
Shirish Pargaonkar5f98ca92010-09-18 22:01:58 -0500204 struct session_key session_key;
Steve French3a5ff612006-07-14 22:37:11 +0000205 unsigned long lstrp; /* when we got last response from this server */
Jeff Layton9bf67e52010-04-24 07:57:46 -0400206 u16 dialect; /* dialect index that server chose */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500207 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
Jeff Layton26efa0b2010-04-24 07:57:49 -0400208 /* extended security flavors that server supports */
209 bool sec_kerberos; /* supports plain Kerberos */
210 bool sec_mskerberos; /* supports legacy MS Kerberos */
211 bool sec_kerberosu2u; /* supports U2U Kerberos */
212 bool sec_ntlmssp; /* supports NTLMSSP */
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -0500213 bool session_estab; /* mark when very first sess is established */
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +0530214#ifdef CONFIG_CIFS_FSCACHE
215 struct fscache_cookie *fscache; /* client index cache cookie */
216#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217};
218
219/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 * Session structure. One of these for each uid session with a particular host
221 */
222struct cifsSesInfo {
Jeff Layton14fbf502008-11-14 13:53:46 -0500223 struct list_head smb_ses_list;
Steve French3b795212008-11-13 19:45:32 +0000224 struct list_head tcon_list;
Steve Frenchd7b619c2010-02-25 05:36:46 +0000225 struct mutex session_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 struct TCP_Server_Info *server; /* pointer to server info */
Jeff Layton14fbf502008-11-14 13:53:46 -0500227 int ses_count; /* reference counter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 enum statusEnum status;
Steve French750d1152006-06-27 06:28:30 +0000229 unsigned overrideSecFlg; /* if non-zero override global sec flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 __u16 ipc_tid; /* special tid for connection to IPC share */
231 __u16 flags;
Steve Frencheca6acf2009-02-20 05:43:09 +0000232 __u16 vcnum;
Steve Frenchad009ac2005-04-28 22:41:05 -0700233 char *serverOS; /* name of operating system underlying server */
234 char *serverNOS; /* name of network operating system of server */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 char *serverDomain; /* security realm of server */
236 int Suid; /* remote smb uid */
Jeff Layton3e4b3e12010-07-19 18:00:17 -0400237 uid_t linux_uid; /* overriding owner of files on the mount */
238 uid_t cred_uid; /* owner of credentials */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 int capabilities;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000240 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
Steve Frenchad009ac2005-04-28 22:41:05 -0700241 TCP names - will ipv6 and sctp addresses fit? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 char userName[MAX_USERNAME_SIZE + 1];
Steve Frenchd38d8c72007-06-28 19:44:13 +0000243 char *domainName;
244 char *password;
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -0500245 struct session_key auth_key;
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500246 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
Steve French3b795212008-11-13 19:45:32 +0000247 bool need_reconnect:1; /* connection reset, uid now invalid */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248};
Steve French9ac00b72006-09-30 04:13:17 +0000249/* no more than one of the following three session flags may be set */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250#define CIFS_SES_NT4 1
Steve French9ac00b72006-09-30 04:13:17 +0000251#define CIFS_SES_OS2 2
252#define CIFS_SES_W9X 4
253/* following flag is set for old servers such as OS2 (and Win95?)
254 which do not negotiate NTLM or POSIX dialects, but instead
255 negotiate one of the older LANMAN dialects */
256#define CIFS_SES_LANMAN 8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257/*
258 * there is one of these for each connection to a resource on a particular
Steve Frenchd38d8c72007-06-28 19:44:13 +0000259 * session
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 */
261struct cifsTconInfo {
Jeff Laytonf1987b42008-11-15 11:12:47 -0500262 struct list_head tcon_list;
263 int tc_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 struct list_head openFileList;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 struct cifsSesInfo *ses; /* pointer to session associated with */
Steve French254e55e2006-06-04 05:53:15 +0000266 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 char *nativeFileSystem;
Jeff Layton00e485b2008-12-05 20:41:21 -0500268 char *password; /* for share-level security */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 __u16 tid; /* The 2 byte tree id */
270 __u16 Flags; /* optional support bits */
271 enum statusEnum tidStatus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272#ifdef CONFIG_CIFS_STATS
273 atomic_t num_smbs_sent;
274 atomic_t num_writes;
275 atomic_t num_reads;
Steve Frenchb298f222009-02-21 21:17:43 +0000276 atomic_t num_flushes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 atomic_t num_oplock_brks;
278 atomic_t num_opens;
Steve Frencha5a2b482005-08-20 21:42:53 -0700279 atomic_t num_closes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 atomic_t num_deletes;
281 atomic_t num_mkdirs;
Steve French65bc98b2009-07-10 15:27:25 +0000282 atomic_t num_posixopens;
283 atomic_t num_posixmkdirs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 atomic_t num_rmdirs;
285 atomic_t num_renames;
286 atomic_t num_t2renames;
Steve Frenchdfb75332005-06-22 17:13:47 -0700287 atomic_t num_ffirst;
288 atomic_t num_fnext;
289 atomic_t num_fclose;
Steve Frencha5a2b482005-08-20 21:42:53 -0700290 atomic_t num_hardlinks;
291 atomic_t num_symlinks;
292 atomic_t num_locks;
Steve French0a4b92c2006-01-12 15:44:21 -0800293 atomic_t num_acl_get;
294 atomic_t num_acl_set;
Steve Frencha5a2b482005-08-20 21:42:53 -0700295#ifdef CONFIG_CIFS_STATS2
296 unsigned long long time_writes;
297 unsigned long long time_reads;
298 unsigned long long time_opens;
299 unsigned long long time_deletes;
300 unsigned long long time_closes;
301 unsigned long long time_mkdirs;
302 unsigned long long time_rmdirs;
303 unsigned long long time_renames;
304 unsigned long long time_t2renames;
305 unsigned long long time_ffirst;
306 unsigned long long time_fnext;
307 unsigned long long time_fclose;
308#endif /* CONFIG_CIFS_STATS2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 __u64 bytes_read;
310 __u64 bytes_written;
311 spinlock_t stat_lock;
Steve Frencha5a2b482005-08-20 21:42:53 -0700312#endif /* CONFIG_CIFS_STATS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
Steve French254e55e2006-06-04 05:53:15 +0000314 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
Steve French4b18f2a2008-04-29 00:06:05 +0000316 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
317 bool retry:1;
318 bool nocase:1;
Steve French95b1cb92008-05-15 16:44:38 +0000319 bool seal:1; /* transport encryption for this mounted share */
Steve French4b18f2a2008-04-29 00:06:05 +0000320 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
Steve Frenchc18c8422007-07-18 23:21:09 +0000321 for this mount even if server would support */
Steve French84210e92008-10-23 04:42:37 +0000322 bool local_lease:1; /* check leases (only) on local system not remote */
Steve French64cc2c62009-03-04 19:54:08 +0000323 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
Steve French3b795212008-11-13 19:45:32 +0000324 bool need_reconnect:1; /* connection reset, tid now invalid */
Suresh Jayaramand03382c2010-07-05 18:12:27 +0530325#ifdef CONFIG_CIFS_FSCACHE
326 u64 resource_id; /* server resource id */
327 struct fscache_cookie *fscache; /* cookie for share */
328#endif
Steve Frenchc18c8422007-07-18 23:21:09 +0000329 /* BB add field for back pointer to sb struct(s)? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330};
331
332/*
Jeff Layton7ffec372010-09-29 19:51:11 -0400333 * This is a refcounted and timestamped container for a tcon pointer. The
334 * container holds a tcon reference. It is considered safe to free one of
335 * these when the tl_count goes to 0. The tl_time is the time of the last
336 * "get" on the container.
337 */
338struct tcon_link {
Jeff Laytonb647c352010-10-28 11:16:44 -0400339 struct rb_node tl_rbnode;
340 uid_t tl_uid;
Jeff Layton9d002df2010-10-06 19:51:11 -0400341 unsigned long tl_flags;
342#define TCON_LINK_MASTER 0
343#define TCON_LINK_PENDING 1
344#define TCON_LINK_IN_TREE 2
345 unsigned long tl_time;
346 atomic_t tl_count;
Jeff Layton7ffec372010-09-29 19:51:11 -0400347 struct cifsTconInfo *tl_tcon;
348};
349
Jeff Layton9d002df2010-10-06 19:51:11 -0400350extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
Jeff Layton7ffec372010-09-29 19:51:11 -0400351
352static inline struct cifsTconInfo *
353tlink_tcon(struct tcon_link *tlink)
354{
Jeff Layton9d002df2010-10-06 19:51:11 -0400355 return tlink->tl_tcon;
Jeff Layton7ffec372010-09-29 19:51:11 -0400356}
357
Jeff Layton9d002df2010-10-06 19:51:11 -0400358extern void cifs_put_tlink(struct tcon_link *tlink);
Jeff Layton7ffec372010-09-29 19:51:11 -0400359
Jeff Layton13cfb732010-09-29 19:51:11 -0400360static inline struct tcon_link *
361cifs_get_tlink(struct tcon_link *tlink)
362{
Jeff Layton9d002df2010-10-06 19:51:11 -0400363 if (tlink && !IS_ERR(tlink))
364 atomic_inc(&tlink->tl_count);
Jeff Layton13cfb732010-09-29 19:51:11 -0400365 return tlink;
366}
367
Jeff Layton7ffec372010-09-29 19:51:11 -0400368/* This function is always expected to succeed */
Jeff Layton9d002df2010-10-06 19:51:11 -0400369extern struct cifsTconInfo *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
Jeff Layton7ffec372010-09-29 19:51:11 -0400370
371/*
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000372 * This info hangs off the cifsFileInfo structure, pointed to by llist.
373 * This is used to track byte stream locks on the file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 */
375struct cifsLockInfo {
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000376 struct list_head llist; /* pointer to next cifsLockInfo */
377 __u64 offset;
378 __u64 length;
379 __u8 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380};
381
382/*
383 * One of these for each open instance of a file
384 */
385struct cifs_search_info {
386 loff_t index_of_last_entry;
387 __u16 entries_in_buffer;
388 __u16 info_level;
389 __u32 resume_key;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000390 char *ntwrk_buf_start;
391 char *srch_entries_start;
Steve French0752f152008-10-07 20:03:33 +0000392 char *last_entry;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000393 char *presume_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 unsigned int resume_name_len;
Steve French4b18f2a2008-04-29 00:06:05 +0000395 bool endOfSearch:1;
396 bool emptyDir:1;
397 bool unicode:1;
398 bool smallBuf:1; /* so we know which buf_release function to call */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399};
400
401struct cifsFileInfo {
402 struct list_head tlist; /* pointer to next fid owned by tcon */
403 struct list_head flist; /* next fid (file instance) for this inode */
404 unsigned int uid; /* allows finding which FileInfo structure */
405 __u32 pid; /* process id who opened file */
406 __u16 netfid; /* file id from remote */
407 /* BB add lock scope info here if needed */ ;
408 /* lock scope id (0 if none) */
Jeff Laytona5e18bc2010-10-11 15:07:18 -0400409 struct dentry *dentry;
Jeff Layton15886172010-10-15 15:33:59 -0400410 unsigned int f_flags;
Jeff Layton13cfb732010-09-29 19:51:11 -0400411 struct tcon_link *tlink;
Roland Dreier796e5662007-05-03 04:33:45 +0000412 struct mutex lock_mutex;
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000413 struct list_head llist; /* list of byte range locks we have. */
Steve French4b18f2a2008-04-29 00:06:05 +0000414 bool invalidHandle:1; /* file closed via session abend */
Jeff Layton3bc303c2009-09-21 06:47:50 -0400415 bool oplock_break_cancelled:1;
Steve French6c0f6212010-10-23 16:51:40 +0000416 int count; /* refcount protected by cifs_file_list_lock */
Steve Frencha6ce4932009-04-09 01:14:32 +0000417 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 struct cifs_search_info srch_inf;
Tejun Heo9b646972010-07-20 22:09:02 +0200419 struct work_struct oplock_break; /* work for oplock breaks */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420};
421
Jeff Layton5f6dbc92010-10-15 15:34:06 -0400422/*
423 * Take a reference on the file private data. Must be called with
424 * cifs_file_list_lock held.
425 */
Dave Kleikamp6ab409b2009-08-31 11:07:12 -0400426static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
427{
Jeff Layton5f6dbc92010-10-15 15:34:06 -0400428 ++cifs_file->count;
Dave Kleikamp6ab409b2009-08-31 11:07:12 -0400429}
430
Jeff Laytonb33879a2010-10-15 15:34:04 -0400431void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
Dave Kleikamp6ab409b2009-08-31 11:07:12 -0400432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433/*
434 * One of these for each file inode
435 */
436
437struct cifsInodeInfo {
438 struct list_head lockList;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000439 /* BB add in lists for dirty pages i.e. write caching info for oplock */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 struct list_head openFileList;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 unsigned long time; /* jiffies of last update/check of inode */
Steve French4b18f2a2008-04-29 00:06:05 +0000443 bool clientCanCacheRead:1; /* read oplock */
444 bool clientCanCacheAll:1; /* read and writebehind oplock */
Jeff Layton9a8165f2008-10-17 21:03:20 -0400445 bool delete_pending:1; /* DELETE_ON_CLOSE is set */
Jeff Laytondf2cf172010-02-12 07:44:16 -0500446 bool invalid_mapping:1; /* pagecache is invalid */
Jeff Laytonfbec9ab2009-04-03 13:44:00 -0400447 u64 server_eof; /* current file size on server */
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400448 u64 uniqueid; /* server inode number */
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530449#ifdef CONFIG_CIFS_FSCACHE
450 struct fscache_cookie *fscache;
451#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 struct inode vfs_inode;
453};
454
455static inline struct cifsInodeInfo *
456CIFS_I(struct inode *inode)
457{
458 return container_of(inode, struct cifsInodeInfo, vfs_inode);
459}
460
461static inline struct cifs_sb_info *
462CIFS_SB(struct super_block *sb)
463{
464 return sb->s_fs_info;
465}
466
Steve Frenchab2f2182005-09-15 20:44:50 -0700467static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
Jeremy Allisonac670552005-06-22 17:26:35 -0700468{
469 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
470 return '/';
471 else
472 return '\\';
473}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
Steve Frencha45443472005-08-24 13:59:35 -0700475#ifdef CONFIG_CIFS_STATS
476#define cifs_stats_inc atomic_inc
477
478static inline void cifs_stats_bytes_written(struct cifsTconInfo *tcon,
479 unsigned int bytes)
480{
481 if (bytes) {
482 spin_lock(&tcon->stat_lock);
483 tcon->bytes_written += bytes;
484 spin_unlock(&tcon->stat_lock);
485 }
486}
487
488static inline void cifs_stats_bytes_read(struct cifsTconInfo *tcon,
489 unsigned int bytes)
490{
491 spin_lock(&tcon->stat_lock);
492 tcon->bytes_read += bytes;
493 spin_unlock(&tcon->stat_lock);
494}
495#else
496
Steve Frenchd38d8c72007-06-28 19:44:13 +0000497#define cifs_stats_inc(field) do {} while (0)
498#define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
499#define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
Steve Frencha45443472005-08-24 13:59:35 -0700500
501#endif
502
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503/* one of these for every pending CIFS request to the server */
504struct mid_q_entry {
505 struct list_head qhead; /* mids waiting on reply from this server */
506 __u16 mid; /* multiplex id */
507 __u16 pid; /* process id */
508 __u32 sequence_number; /* for CIFS signing */
Steve French1047abc2005-10-11 19:58:06 -0700509 unsigned long when_alloc; /* when mid was created */
510#ifdef CONFIG_CIFS_STATS2
511 unsigned long when_sent; /* time when smb send finished */
512 unsigned long when_received; /* when demux complete (taken off wire) */
513#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 struct task_struct *tsk; /* task waiting for response */
515 struct smb_hdr *resp_buf; /* response buffer */
516 int midState; /* wish this were enum but can not pass to wait_event */
Steve Frenchc81156d2005-04-28 22:41:07 -0700517 __u8 command; /* smb command code */
Steve French4b18f2a2008-04-29 00:06:05 +0000518 bool largeBuf:1; /* if valid response, is pointer to large buf */
519 bool multiRsp:1; /* multiple trans2 responses for one request */
520 bool multiEnd:1; /* both received */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521};
522
523struct oplock_q_entry {
524 struct list_head qhead;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000525 struct inode *pinode;
526 struct cifsTconInfo *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 __u16 netfid;
528};
529
Steve Frenchff5dbd92005-08-24 17:10:36 -0700530/* for pending dnotify requests */
531struct dir_notify_req {
Steve French13cd4b72010-10-07 18:46:32 +0000532 struct list_head lhead;
533 __le16 Pid;
534 __le16 PidHigh;
535 __u16 Mid;
536 __u16 Tid;
537 __u16 Uid;
538 __u16 netfid;
539 __u32 filter; /* CompletionFilter (for multishot) */
540 int multishot;
541 struct file *pfile;
Steve Frenchff5dbd92005-08-24 17:10:36 -0700542};
543
Steve French366781c2008-01-25 10:12:41 +0000544struct dfs_info3_param {
545 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
Igor Mammedov8aad0182008-02-15 18:21:49 +0000546 int path_consumed;
Steve French366781c2008-01-25 10:12:41 +0000547 int server_type;
548 int ref_flag;
549 char *path_name;
550 char *node_name;
551};
552
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400553/*
554 * common struct for holding inode info when searching for or updating an
555 * inode with new info
556 */
557
558#define CIFS_FATTR_DFS_REFERRAL 0x1
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400559#define CIFS_FATTR_DELETE_PENDING 0x2
560#define CIFS_FATTR_NEED_REVAL 0x4
Jeff Layton3d694382010-05-11 14:59:55 -0400561#define CIFS_FATTR_INO_COLLISION 0x8
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400562
563struct cifs_fattr {
564 u32 cf_flags;
565 u32 cf_cifsattrs;
566 u64 cf_uniqueid;
567 u64 cf_eof;
568 u64 cf_bytes;
569 uid_t cf_uid;
570 gid_t cf_gid;
571 umode_t cf_mode;
572 dev_t cf_rdev;
573 unsigned int cf_nlink;
574 unsigned int cf_dtype;
575 struct timespec cf_atime;
576 struct timespec cf_mtime;
577 struct timespec cf_ctime;
578};
579
Steve French366781c2008-01-25 10:12:41 +0000580static inline void free_dfs_info_param(struct dfs_info3_param *param)
581{
582 if (param) {
583 kfree(param->path_name);
584 kfree(param->node_name);
585 kfree(param);
586 }
587}
588
589static inline void free_dfs_info_array(struct dfs_info3_param *param,
590 int number_of_items)
591{
592 int i;
593 if ((number_of_items == 0) || (param == NULL))
594 return;
595 for (i = 0; i < number_of_items; i++) {
596 kfree(param[i].path_name);
597 kfree(param[i].node_name);
598 }
599 kfree(param);
600}
601
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602#define MID_FREE 0
603#define MID_REQUEST_ALLOCATED 1
604#define MID_REQUEST_SUBMITTED 2
605#define MID_RESPONSE_RECEIVED 4
606#define MID_RETRY_NEEDED 8 /* session closed while this request out */
607#define MID_NO_RESP_NEEDED 0x10
Steve Frenchec637e32005-12-12 20:53:18 -0800608
609/* Types of response buffer returned from SendReceive2 */
610#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
611#define CIFS_SMALL_BUFFER 1
612#define CIFS_LARGE_BUFFER 2
613#define CIFS_IOVEC 4 /* array of response buffers */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614
Steve French133672e2007-11-13 22:41:37 +0000615/* Type of Request to SendReceive2 */
616#define CIFS_STD_OP 0 /* normal request timeout */
617#define CIFS_LONG_OP 1 /* long op (up to 45 sec, oplock time) */
618#define CIFS_VLONG_OP 2 /* sloow op - can take up to 180 seconds */
619#define CIFS_BLOCKING_OP 4 /* operation can block */
620#define CIFS_ASYNC_OP 8 /* do not wait for response */
621#define CIFS_TIMEOUT_MASK 0x00F /* only one of 5 above set in req */
622#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
623#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
624#define CIFS_NO_RESP 0x040 /* no response buffer required */
625
Steve French39798772006-05-31 22:40:51 +0000626/* Security Flags: indicate type of session setup needed */
627#define CIFSSEC_MAY_SIGN 0x00001
628#define CIFSSEC_MAY_NTLM 0x00002
629#define CIFSSEC_MAY_NTLMV2 0x00004
630#define CIFSSEC_MAY_KRB5 0x00008
631#ifdef CONFIG_CIFS_WEAK_PW_HASH
632#define CIFSSEC_MAY_LANMAN 0x00010
633#define CIFSSEC_MAY_PLNTXT 0x00020
Steve French516897a2007-10-12 19:24:06 +0000634#else
635#define CIFSSEC_MAY_LANMAN 0
636#define CIFSSEC_MAY_PLNTXT 0
Steve French39798772006-05-31 22:40:51 +0000637#endif /* weak passwords */
638#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
Steve Frenchac683922009-05-06 04:16:04 +0000639#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
Steve French5815449d2006-02-14 01:36:20 +0000640
Steve French39798772006-05-31 22:40:51 +0000641#define CIFSSEC_MUST_SIGN 0x01001
642/* note that only one of the following can be set so the
643result of setting MUST flags more than once will be to
644require use of the stronger protocol */
645#define CIFSSEC_MUST_NTLM 0x02002
646#define CIFSSEC_MUST_NTLMV2 0x04004
647#define CIFSSEC_MUST_KRB5 0x08008
648#ifdef CONFIG_CIFS_WEAK_PW_HASH
649#define CIFSSEC_MUST_LANMAN 0x10010
650#define CIFSSEC_MUST_PLNTXT 0x20020
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000651#ifdef CONFIG_CIFS_UPCALL
Chuck Ebbert20d17522009-09-15 01:53:21 -0400652#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000653#else
Chuck Ebbert20d17522009-09-15 01:53:21 -0400654#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
Steve French016ec752007-10-16 18:10:10 +0000655#endif /* UPCALL */
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000656#else /* do not allow weak pw hash */
657#ifdef CONFIG_CIFS_UPCALL
Steve Frenchac683922009-05-06 04:16:04 +0000658#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
Jeff Layton0d3a01f2007-10-16 17:32:19 +0000659#else
Steve Frenchac683922009-05-06 04:16:04 +0000660#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
Steve French016ec752007-10-16 18:10:10 +0000661#endif /* UPCALL */
Steve French39798772006-05-31 22:40:51 +0000662#endif /* WEAK_PW_HASH */
663#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
Steve Frenchac683922009-05-06 04:16:04 +0000664#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
Steve French39798772006-05-31 22:40:51 +0000665
Shirish Pargaonkaref571ca2008-07-24 15:56:05 +0000666#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
667#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
Steve Frenchac683922009-05-06 04:16:04 +0000668#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 -0700669/*
670 *****************************************************************
671 * All constants go here
672 *****************************************************************
673 */
674
675#define UID_HASH (16)
676
677/*
678 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
679 * following to be declared.
680 */
681
682/****************************************************************************
683 * Locking notes. All updates to global variables and lists should be
684 * protected by spinlocks or semaphores.
685 *
686 * Spinlocks
687 * ---------
688 * GlobalMid_Lock protects:
689 * list operations on pending_mid_q and oplockQ
690 * updates to XID counters, multiplex id and SMB sequence numbers
Suresh Jayaraman6573e9b2010-10-18 23:52:18 +0530691 * cifs_file_list_lock protects:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 * list operations on tcp and SMB session lists and tCon lists
693 * f_owner.lock protects certain per file struct operations
694 * mapping->page_lock protects certain per page operations
695 *
696 * Semaphores
697 * ----------
698 * sesSem operations on smb session
699 * tconSem operations on tree connection
Steve Frenchd38d8c72007-06-28 19:44:13 +0000700 * fh_sem file handle reconnection operations
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 *
702 ****************************************************************************/
703
704#ifdef DECLARE_GLOBALS_HERE
705#define GLOBAL_EXTERN
706#else
707#define GLOBAL_EXTERN extern
708#endif
709
Jeff Laytone7ddee92008-11-14 13:44:38 -0500710/*
711 * the list of TCP_Server_Info structures, ie each of the sockets
Steve Frenchfb396012008-11-13 20:04:07 +0000712 * connecting our client to a distinct server (ip address), is
Jeff Laytone7ddee92008-11-14 13:44:38 -0500713 * chained together by cifs_tcp_ses_list. The list of all our SMB
Steve Frenchfb396012008-11-13 20:04:07 +0000714 * sessions (and from that the tree connections) can be found
Jeff Laytone7ddee92008-11-14 13:44:38 -0500715 * by iterating over cifs_tcp_ses_list
716 */
717GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
718
Jeff Laytonf1987b42008-11-15 11:12:47 -0500719/*
720 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
721 * tcp session, and the list of tcon's per smb session. It also protects
722 * the reference counters for the server, smb session, and tcon. Finally,
723 * changes to the tcon->tidStatus should be done while holding this lock.
724 */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530725GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000726
727/*
728 * This lock protects the cifs_file->llist and cifs_file->flist
729 * list operations, and updates to some flags (cifs_file->invalidHandle)
730 * It will be moved to either use the tcon->stat_lock or equivalent later.
731 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
732 * the cifs_tcp_ses_lock must be grabbed first and released last.
733 */
Jeff Layton44772882010-10-15 15:34:03 -0400734GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
Steve French99ee4db2007-02-27 05:35:17 +0000736/* Outstanding dir notify requests */
737GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
738/* DirNotify response queue */
739GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
Steve Frenchff5dbd92005-08-24 17:10:36 -0700740
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741/*
742 * Global transaction id (XID) information
743 */
744GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +0000745GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +0000747GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
748 /* on midQ entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749GLOBAL_EXTERN char Local_System_Name[15];
750
751/*
752 * Global counters, updated atomically
753 */
754GLOBAL_EXTERN atomic_t sesInfoAllocCount;
755GLOBAL_EXTERN atomic_t tconInfoAllocCount;
756GLOBAL_EXTERN atomic_t tcpSesAllocCount;
757GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
758GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
759
Steve Frenchaaa9bbe2008-05-23 17:38:32 +0000760/* Various Debug counters */
Steve French4498eed52005-12-03 13:58:57 -0800761GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
762#ifdef CONFIG_CIFS_STATS2
763GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
764GLOBAL_EXTERN atomic_t totSmBufAllocCount;
765#endif
766GLOBAL_EXTERN atomic_t smBufAllocCount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767GLOBAL_EXTERN atomic_t midCount;
768
769/* Misc globals */
Steve French254e55e2006-06-04 05:53:15 +0000770GLOBAL_EXTERN unsigned int multiuser_mount; /* if enabled allows new sessions
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 to be established on existing mount if we
Steve Frenchd38d8c72007-06-28 19:44:13 +0000772 have the uid/password or Kerberos credential
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 or equivalent for current user */
774GLOBAL_EXTERN unsigned int oplockEnabled;
775GLOBAL_EXTERN unsigned int experimEnabled;
776GLOBAL_EXTERN unsigned int lookupCacheEnabled;
Jeff Layton04912d62010-04-24 07:57:45 -0400777GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 with more secure ntlmssp2 challenge/resp */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
781GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
782GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
783GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
784GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
785
Tejun Heo9b646972010-07-20 22:09:02 +0200786void cifs_oplock_break(struct work_struct *work);
787void cifs_oplock_break_get(struct cifsFileInfo *cfile);
788void cifs_oplock_break_put(struct cifsFileInfo *cfile);
Linus Torvalds3b7433b2010-08-07 12:42:58 -0700789
Jeff Layton3bc303c2009-09-21 06:47:50 -0400790extern const struct slow_work_ops cifs_oplock_break_ops;
Suresh Jayaramanabd2e442010-06-22 20:52:50 +0530791
792#endif /* _CIFS_GLOB_H */