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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>
Pavel Shilovsky2dc7e1c2011-12-26 22:53:34 +040025#include <linux/mempool.h>
Tejun Heo9b646972010-07-20 22:09:02 +020026#include <linux/workqueue.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "cifs_fs_sb.h"
Steve French442aa312007-09-24 20:25:46 +000028#include "cifsacl.h"
Shirish Pargaonkard2b91522010-10-21 14:25:08 -050029#include <crypto/internal/hash.h>
30#include <linux/scatterlist.h>
Scott Lovenberg8c3a2b42013-08-09 08:47:17 -040031#include <uapi/linux/cifs/cifs_mount.h>
Pavel Shilovskyd60622e2012-05-28 15:19:39 +040032#ifdef CONFIG_CIFS_SMB2
33#include "smb2pdu.h"
34#endif
Shirish Pargaonkard2b91522010-10-21 14:25:08 -050035
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -070036#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038/*
39 * The sizes of various internal tables and strings
40 */
41#define MAX_UID_INFO 16
42#define MAX_SES_INFO 2
43#define MAX_TCON_INFO 4
44
Scott Lovenbergcdf12462013-08-09 08:47:19 -040045#define MAX_TREE_SIZE (2 + CIFS_NI_MAXHOST + 1 + CIFS_MAX_SHARE_LEN + 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
47#define CIFS_MIN_RCV_POOL 4
48
Shirish Pargaonkar2c0c2a02012-05-21 09:20:12 -050049#define MAX_REOPEN_ATT 5 /* these many maximum attempts to reopen a file */
Linus Torvalds1da177e2005-04-16 15:20:36 -070050/*
Suresh Jayaraman6d20e842010-12-01 14:42:28 +053051 * default attribute cache timeout (jiffies)
52 */
53#define CIFS_DEF_ACTIMEO (1 * HZ)
54
55/*
56 * max attribute cache timeout (jiffies) - 2^30
57 */
58#define CIFS_MAX_ACTIMEO (1 << 30)
59
60/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 * MAX_REQ is the maximum number of requests that WE will send
Pavel Shilovsky10b9b982012-03-20 12:55:09 +030062 * on one socket concurrently.
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 */
Pavel Shilovsky10b9b982012-03-20 12:55:09 +030064#define CIFS_MAX_REQ 32767
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Jeff Layton8ecaf672008-12-01 15:23:50 -050066#define RFC1001_NAME_LEN 15
67#define RFC1001_NAME_LEN_WITH_NULL (RFC1001_NAME_LEN + 1)
68
69/* currently length of NIP6_FMT */
70#define SERVER_NAME_LENGTH 40
Linus Torvalds1da177e2005-04-16 15:20:36 -070071#define SERVER_NAME_LEN_WITH_NULL (SERVER_NAME_LENGTH + 1)
72
73/* used to define string lengths for reversing unicode strings */
74/* (256+1)*2 = 514 */
75/* (max path length + 1 for null) * 2 for unicode */
76#define MAX_NAME 514
77
Pavel Shilovsky9094fad2012-07-12 18:30:44 +040078/* SMB echo "timeout" -- FIXME: tunable? */
79#define SMB_ECHO_INTERVAL (60 * HZ)
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081#include "cifspdu.h"
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#ifndef XATTR_DOS_ATTRIB
84#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
85#endif
86
87/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 * CIFS vfs client Status information (based on what we know.)
89 */
90
Steve French6c0f6212010-10-23 16:51:40 +000091/* associated with each tcp and smb session */
Linus Torvalds1da177e2005-04-16 15:20:36 -070092enum statusEnum {
93 CifsNew = 0,
94 CifsGood,
95 CifsExiting,
Steve Frenchfd88ce92011-04-12 01:01:14 +000096 CifsNeedReconnect,
97 CifsNeedNegotiate
Linus Torvalds1da177e2005-04-16 15:20:36 -070098};
99
100enum securityEnum {
Jeff Layton515d82f2013-05-26 07:00:58 -0400101 Unspecified = 0, /* not specified */
102 LANMAN, /* Legacy LANMAN auth */
Steve French39798772006-05-31 22:40:51 +0000103 NTLM, /* Legacy NTLM012 auth with NTLM hash */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
Steve Frenchac683922009-05-06 04:16:04 +0000105 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
Steve Frenchc16fefa2008-08-19 19:35:33 +0000106 Kerberos, /* Kerberos via SPNEGO */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107};
108
Shirish Pargaonkar5f98ca92010-09-18 22:01:58 -0500109struct session_key {
Steve Frenchb609f062007-07-09 07:55:14 +0000110 unsigned int len;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500111 char *response;
Steve Frenchb609f062007-07-09 07:55:14 +0000112};
113
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500114/* crypto security descriptor definition */
115struct sdesc {
116 struct shash_desc shash;
117 char ctx[];
118};
119
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -0500120/* crypto hashing related structure/fields, not specific to a sec mech */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500121struct cifs_secmech {
122 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
123 struct crypto_shash *md5; /* md5 hash function */
Pavel Shilovsky3c1bf7e2012-09-18 16:20:30 -0700124 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
Steve French429b46f2013-06-26 23:45:05 -0500125 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500126 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
127 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
Pavel Shilovsky3c1bf7e2012-09-18 16:20:30 -0700128 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
Steve French429b46f2013-06-26 23:45:05 -0500129 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500130};
131
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500132/* per smb session structure/fields */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500133struct ntlmssp_auth {
Shirish Pargaonkar5c234aa2013-08-29 08:35:10 -0500134 bool sesskey_per_smbsess; /* whether session key is per smb session */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500135 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
136 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
137 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500138 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500139};
140
Steve French442aa312007-09-24 20:25:46 +0000141struct cifs_cred {
142 int uid;
143 int gid;
144 int mode;
145 int cecount;
146 struct cifs_sid osid;
147 struct cifs_sid gsid;
148 struct cifs_ntace *ntaces;
149 struct cifs_ace *aces;
150};
151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152/*
153 *****************************************************************
154 * Except the CIFS PDUs themselves all the
155 * globally interesting structs should go here
156 *****************************************************************
157 */
158
Jeff Laytonbf5ea0e2012-09-18 16:20:34 -0700159/*
160 * A smb_rqst represents a complete request to be issued to a server. It's
161 * formed by a kvec array, followed by an array of pages. Page data is assumed
162 * to start at the beginning of the first page.
163 */
164struct smb_rqst {
165 struct kvec *rq_iov; /* array of kvecs */
166 unsigned int rq_nvec; /* number of kvecs in array */
167 struct page **rq_pages; /* pointer to array of page ptrs */
168 unsigned int rq_npages; /* number pages in array */
169 unsigned int rq_pagesz; /* page size to use */
170 unsigned int rq_tailsz; /* length of last page */
171};
172
Jeff Layton23db65f2012-05-15 12:20:51 -0400173enum smb_version {
174 Smb_1 = 1,
Steve Frenchdd446b12012-11-28 23:21:06 -0600175 Smb_20,
Steve French1080ef72011-02-24 18:07:19 +0000176 Smb_21,
Steve Frenche4aa25e2012-10-01 12:26:22 -0500177 Smb_30,
Steve French20b6d8b2013-06-12 22:48:41 -0500178 Smb_302,
Jeff Layton23db65f2012-05-15 12:20:51 -0400179};
180
Jeff Layton121b0462012-05-15 12:21:10 -0400181struct mid_q_entry;
182struct TCP_Server_Info;
Pavel Shilovsky55157df2012-02-28 14:04:17 +0300183struct cifsFileInfo;
Pavel Shilovsky082d0642012-05-17 12:18:21 +0400184struct cifs_ses;
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +0400185struct cifs_tcon;
Pavel Shilovskyb669f332012-05-27 20:21:53 +0400186struct dfs_info3_param;
Pavel Shilovsky1208ef12012-05-27 17:34:43 +0400187struct cifs_fattr;
Pavel Shilovsky9224dfc2012-05-27 20:39:52 +0400188struct smb_vol;
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700189struct cifs_fid;
Pavel Shilovskyfc9c5962012-09-18 16:20:28 -0700190struct cifs_readdata;
Pavel Shilovskyc9de5c82012-09-18 16:20:29 -0700191struct cifs_writedata;
Pavel Shilovskyf9c6e232012-09-18 16:20:29 -0700192struct cifs_io_parms;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700193struct cifs_search_info;
Pavel Shilovsky95a3f2f2012-09-18 16:20:33 -0700194struct cifsInodeInfo;
Pavel Shilovsky226730b2013-07-05 12:00:30 +0400195struct cifs_open_parms;
Jeff Layton121b0462012-05-15 12:21:10 -0400196
Jeff Layton23db65f2012-05-15 12:20:51 -0400197struct smb_version_operations {
Jeff Layton121b0462012-05-15 12:21:10 -0400198 int (*send_cancel)(struct TCP_Server_Info *, void *,
199 struct mid_q_entry *);
Pavel Shilovsky55157df2012-02-28 14:04:17 +0300200 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
Pavel Shilovsky082d0642012-05-17 12:18:21 +0400201 /* setup request: allocate mid, sign message */
Jeff Laytonfec344e2012-09-18 16:20:35 -0700202 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
203 struct smb_rqst *);
Pavel Shilovsky45740842012-06-01 14:26:18 +0400204 /* setup async request: allocate mid, sign message */
Jeff Laytonfec344e2012-09-18 16:20:35 -0700205 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
206 struct smb_rqst *);
Pavel Shilovsky082d0642012-05-17 12:18:21 +0400207 /* check response: verify signature, map error */
208 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
209 bool);
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400210 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
211 const int);
Pavel Shilovsky45275782012-05-17 17:53:29 +0400212 void (*set_credits)(struct TCP_Server_Info *, const int);
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400213 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
214 unsigned int (*get_credits)(struct mid_q_entry *);
Pavel Shilovsky88257362012-05-23 14:01:59 +0400215 __u64 (*get_next_mid)(struct TCP_Server_Info *);
Pavel Shilovskyeb378712012-05-17 13:02:51 +0400216 /* data offset from read response message */
217 unsigned int (*read_data_offset)(char *);
218 /* data length from read response message */
219 unsigned int (*read_data_length)(char *);
220 /* map smb to linux error */
221 int (*map_error)(char *, bool);
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400222 /* find mid corresponding to the response message */
223 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
224 void (*dump_detail)(void *);
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400225 void (*clear_stats)(struct cifs_tcon *);
226 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
Steve French769ee6a2013-06-19 14:15:30 -0500227 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400228 /* verify the message */
229 int (*check_message)(char *, unsigned int);
230 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
Pavel Shilovsky316cf942012-05-23 14:31:03 +0400231 /* process transaction2 response */
232 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
233 char *, int);
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400234 /* check if we need to negotiate */
235 bool (*need_neg)(struct TCP_Server_Info *);
236 /* negotiate to the server */
237 int (*negotiate)(const unsigned int, struct cifs_ses *);
Pavel Shilovsky24985c52012-09-18 16:20:28 -0700238 /* set negotiated write size */
239 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
240 /* set negotiated read size */
241 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
Pavel Shilovsky58c45c52012-05-25 10:54:49 +0400242 /* setup smb sessionn */
243 int (*sess_setup)(const unsigned int, struct cifs_ses *,
244 const struct nls_table *);
245 /* close smb session */
246 int (*logoff)(const unsigned int, struct cifs_ses *);
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +0400247 /* connect to a server share */
248 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
249 struct cifs_tcon *, const struct nls_table *);
250 /* close tree connecion */
251 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
Pavel Shilovskyb669f332012-05-27 20:21:53 +0400252 /* get DFS referrals */
253 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
254 const char *, struct dfs_info3_param **,
255 unsigned int *, const struct nls_table *, int);
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +0400256 /* informational QFS call */
257 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
Pavel Shilovsky68889f22012-05-25 14:40:22 +0400258 /* check if a path is accessible or not */
259 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
260 struct cifs_sb_info *, const char *);
Pavel Shilovsky1208ef12012-05-27 17:34:43 +0400261 /* query path data from the server */
262 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
263 struct cifs_sb_info *, const char *,
Pavel Shilovskyeb85d94b2013-10-23 17:49:47 +0400264 FILE_ALL_INFO *, bool *, bool *);
Pavel Shilovsky4ad65042012-09-18 16:20:26 -0700265 /* query file data from the server */
266 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
267 struct cifs_fid *, FILE_ALL_INFO *);
Pavel Shilovsky1208ef12012-05-27 17:34:43 +0400268 /* get server index number */
269 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
270 struct cifs_sb_info *, const char *,
271 u64 *uniqueid, FILE_ALL_INFO *);
Pavel Shilovskyd1433412012-09-18 16:20:31 -0700272 /* set size by path */
273 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
274 const char *, __u64, struct cifs_sb_info *, bool);
275 /* set size by file handle */
276 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
277 struct cifsFileInfo *, __u64, bool);
Pavel Shilovsky6bdf6db2012-09-18 16:20:32 -0700278 /* set attributes */
279 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
280 const unsigned int);
Steve French64a5cfa2013-10-14 15:31:32 -0500281 int (*set_compression)(const unsigned int, struct cifs_tcon *,
282 struct cifsFileInfo *);
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400283 /* check if we can send an echo or nor */
284 bool (*can_echo)(struct TCP_Server_Info *);
285 /* send echo request */
286 int (*echo)(struct TCP_Server_Info *);
Pavel Shilovskyf4367202012-03-17 11:41:12 +0300287 /* create directory */
288 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
289 struct cifs_sb_info *);
290 /* set info on created directory */
291 void (*mkdir_setinfo)(struct inode *, const char *,
292 struct cifs_sb_info *, struct cifs_tcon *,
293 const unsigned int);
Pavel Shilovskyf958ca52012-07-10 16:14:18 +0400294 /* remove directory */
295 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
296 struct cifs_sb_info *);
Pavel Shilovskyed6875e2012-09-18 16:20:25 -0700297 /* unlink file */
298 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
299 struct cifs_sb_info *);
300 /* open, rename and delete file */
301 int (*rename_pending_delete)(const char *, struct dentry *,
302 const unsigned int);
Pavel Shilovsky8ceb9842012-09-18 16:20:30 -0700303 /* send rename request */
304 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
305 const char *, struct cifs_sb_info *);
Steve Frenchd6e906f2012-09-18 16:20:31 -0700306 /* send create hardlink request */
307 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
308 const char *, const char *,
309 struct cifs_sb_info *);
Pavel Shilovskyb42bf882013-08-14 19:25:21 +0400310 /* query symlink target */
311 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
312 const char *, char **, struct cifs_sb_info *);
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700313 /* open a file for non-posix mounts */
Pavel Shilovsky226730b2013-07-05 12:00:30 +0400314 int (*open)(const unsigned int, struct cifs_open_parms *,
315 __u32 *, FILE_ALL_INFO *);
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700316 /* set fid protocol-specific info */
317 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
Pavel Shilovsky0ff78a22012-09-18 16:20:26 -0700318 /* close a file */
Pavel Shilovsky760ad0c2012-09-25 11:00:07 +0400319 void (*close)(const unsigned int, struct cifs_tcon *,
320 struct cifs_fid *);
Pavel Shilovsky1d8c4c02012-09-18 16:20:27 -0700321 /* send a flush request to the server */
322 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
Pavel Shilovskyfc9c5962012-09-18 16:20:28 -0700323 /* async read from the server */
324 int (*async_readv)(struct cifs_readdata *);
Pavel Shilovskyc9de5c82012-09-18 16:20:29 -0700325 /* async write to the server */
Steve French4a5c80d2014-02-07 20:45:12 -0600326 int (*async_writev)(struct cifs_writedata *,
327 void (*release)(struct kref *));
Pavel Shilovskyf9c6e232012-09-18 16:20:29 -0700328 /* sync read from the server */
329 int (*sync_read)(const unsigned int, struct cifsFileInfo *,
330 struct cifs_io_parms *, unsigned int *, char **,
331 int *);
Pavel Shilovskyba9ad7252012-09-18 16:20:30 -0700332 /* sync write to the server */
333 int (*sync_write)(const unsigned int, struct cifsFileInfo *,
334 struct cifs_io_parms *, unsigned int *, struct kvec *,
335 unsigned long);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700336 /* open dir, start readdir */
337 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
338 const char *, struct cifs_sb_info *,
339 struct cifs_fid *, __u16,
340 struct cifs_search_info *);
341 /* continue readdir */
342 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
343 struct cifs_fid *,
344 __u16, struct cifs_search_info *srch_inf);
345 /* close dir */
346 int (*close_dir)(const unsigned int, struct cifs_tcon *,
347 struct cifs_fid *);
348 /* calculate a size of SMB message */
349 unsigned int (*calc_smb_size)(void *);
Pavel Shilovsky2e44b282012-09-18 16:20:33 -0700350 /* check for STATUS_PENDING and process it in a positive case */
351 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
Pavel Shilovsky95a3f2f2012-09-18 16:20:33 -0700352 /* send oplock break response */
353 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
354 struct cifsInodeInfo *);
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700355 /* query remote filesystem */
356 int (*queryfs)(const unsigned int, struct cifs_tcon *,
357 struct kstatfs *);
Pavel Shilovskyd39a4f72012-09-19 06:22:43 -0700358 /* send mandatory brlock to the server */
359 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
360 __u64, __u32, int, int, bool);
361 /* unlock range of mandatory locks */
362 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
363 const unsigned int);
364 /* push brlocks from the cache to the server */
365 int (*push_mand_locks)(struct cifsFileInfo *);
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700366 /* get lease key of the inode */
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400367 void (*get_lease_key)(struct inode *, struct cifs_fid *);
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700368 /* set lease key of the inode */
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400369 void (*set_lease_key)(struct inode *, struct cifs_fid *);
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700370 /* generate new lease key */
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400371 void (*new_lease_key)(struct cifs_fid *);
Shirish Pargaonkar32811d22013-08-29 08:35:11 -0500372 int (*generate_signingkey)(struct cifs_ses *);
Pavel Shilovsky53ef1012013-09-05 16:11:28 +0400373 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
Sachin Prabhub5be1a12013-11-25 17:09:49 +0000374 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
375 struct cifs_sb_info *, const unsigned char *,
376 char *, unsigned int *);
Sachin Prabhucbb0aba2013-11-25 17:09:52 +0000377 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
378 struct cifs_sb_info *, const unsigned char *,
379 char *, unsigned int *);
Pavel Shilovsky53ef1012013-09-05 16:11:28 +0400380 /* if we can do cache read operations */
381 bool (*is_read_op)(__u32);
382 /* set oplock level for the inode */
Pavel Shilovsky42873b02013-09-05 21:30:16 +0400383 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
384 bool *);
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400385 /* create lease context buffer for CREATE request */
386 char * (*create_lease_buf)(u8 *, u8);
Pavel Shilovsky42873b02013-09-05 21:30:16 +0400387 /* parse lease context buffer and return oplock/epoch info */
388 __u8 (*parse_lease_buf)(void *, unsigned int *);
Steve French41c13582013-11-14 00:05:36 -0600389 int (*clone_range)(const unsigned int, struct cifsFileInfo *src_file,
390 struct cifsFileInfo *target_file, u64 src_off, u64 len,
391 u64 dest_off);
Steve Frenchff1c0382013-11-19 23:44:46 -0600392 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
Steve French666753c2014-01-26 23:53:43 -0600393 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
394 const unsigned char *, const unsigned char *, char *,
395 size_t, const struct nls_table *, int);
396 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
397 const char *, const void *, const __u16,
398 const struct nls_table *, int);
Steve French83e3bc22014-02-02 23:31:47 -0600399 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
400 const char *, u32 *);
Steve French42eacf92014-02-10 14:08:16 -0600401 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
402 const struct cifs_fid *, u32 *);
Steve French83e3bc22014-02-02 23:31:47 -0600403 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
404 int);
Jeff Layton23db65f2012-05-15 12:20:51 -0400405};
406
407struct smb_version_values {
408 char *version_string;
Steve Frenche4aa25e2012-10-01 12:26:22 -0500409 __u16 protocol_id;
410 __u32 req_capabilities;
Pavel Shilovsky106dc532012-02-28 14:23:34 +0300411 __u32 large_lock_type;
412 __u32 exclusive_lock_type;
413 __u32 shared_lock_type;
414 __u32 unlock_lock_type;
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400415 size_t header_size;
416 size_t max_header_size;
Pavel Shilovskyeb378712012-05-17 13:02:51 +0400417 size_t read_rsp_size;
Pavel Shilovsky2dc7e1c2011-12-26 22:53:34 +0400418 __le16 lock_cmd;
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400419 unsigned int cap_unix;
420 unsigned int cap_nt_find;
421 unsigned int cap_large_files;
Jeff Layton50285882013-06-27 12:45:00 -0400422 __u16 signing_enabled;
423 __u16 signing_required;
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400424 size_t create_lease_size;
Jeff Layton23db65f2012-05-15 12:20:51 -0400425};
426
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400427#define HEADER_SIZE(server) (server->vals->header_size)
428#define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
429
Steve Frenchf87d39d2011-05-27 03:50:55 +0000430struct smb_vol {
431 char *username;
432 char *password;
433 char *domainname;
434 char *UNC;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000435 char *iocharset; /* local code page for mapping to and from Unicode */
436 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
437 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
Eric W. Biederman3da46562013-02-06 01:37:39 -0800438 kuid_t cred_uid;
439 kuid_t linux_uid;
440 kgid_t linux_gid;
441 kuid_t backupuid;
442 kgid_t backupgid;
Al Viro5206efd2011-07-26 03:22:14 -0400443 umode_t file_mode;
444 umode_t dir_mode;
Jeff Layton1e3cc572013-06-10 17:12:23 -0500445 enum securityEnum sectype; /* sectype requested via mnt opts */
446 bool sign; /* was signing requested via mnt opts? */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000447 bool retry:1;
448 bool intr:1;
449 bool setuids:1;
450 bool override_uid:1;
451 bool override_gid:1;
452 bool dynperm:1;
453 bool noperm:1;
454 bool no_psx_acl:1; /* set if posix acl support should be disabled */
455 bool cifs_acl:1;
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -0500456 bool backupuid_specified; /* mount option backupuid is specified */
457 bool backupgid_specified; /* mount option backupgid is specified */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000458 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
459 bool server_ino:1; /* use inode numbers from server ie UniqueId */
460 bool direct_io:1;
461 bool strict_io:1; /* strict cache behavior */
462 bool remap:1; /* set to remap seven reserved chars in filenames */
463 bool posix_paths:1; /* unset to not ask for posix pathnames. */
464 bool no_linux_ext:1;
465 bool sfu_emul:1;
466 bool nullauth:1; /* attempt to authenticate with null user */
467 bool nocase:1; /* request case insensitive filenames */
468 bool nobrl:1; /* disable sending byte range locks to srv */
469 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
470 bool seal:1; /* request transport encryption on share */
471 bool nodfs:1; /* Do not request DFS, even if available */
472 bool local_lease:1; /* check leases only on local system, not remote */
473 bool noblocksnd:1;
474 bool noautotune:1;
475 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
476 bool fsc:1; /* enable fscache */
477 bool mfsymlinks:1; /* use Minshall+French Symlinks */
478 bool multiuser:1;
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000479 bool rwpidforward:1; /* pid forward for read/write operations */
Jeff Laytona0b3df52013-05-24 07:40:59 -0400480 bool nosharesock;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000481 unsigned int rsize;
482 unsigned int wsize;
483 bool sockopt_tcp_nodelay:1;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000484 unsigned long actimeo; /* attribute cache timeout (jiffies) */
Jeff Layton23db65f2012-05-15 12:20:51 -0400485 struct smb_version_operations *ops;
486 struct smb_version_values *vals;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000487 char *prepath;
Jeff Laytonb979aaa2012-11-26 11:09:55 -0500488 struct sockaddr_storage dstaddr; /* destination address */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000489 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
490 struct nls_table *local_nls;
491};
492
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400493#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
494 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
495 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
496 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
497 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
498 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
499 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
500 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -0500501 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
502 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400503
504#define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
505 MS_NODEV | MS_SYNCHRONOUS)
506
507struct cifs_mnt_data {
508 struct cifs_sb_info *cifs_sb;
509 struct smb_vol *vol;
510 int flags;
511};
512
Pavel Shilovsky792af7b2012-03-23 14:28:02 -0400513static inline unsigned int
514get_rfc1002_length(void *buf)
515{
Jeff Laytondca1c8d2014-02-22 19:35:38 -0500516 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
Pavel Shilovsky792af7b2012-03-23 14:28:02 -0400517}
518
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400519static inline void
520inc_rfc1001_len(void *buf, int count)
521{
522 be32_add_cpu((__be32 *)buf, count);
523}
524
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525struct TCP_Server_Info {
Steve French3b795212008-11-13 19:45:32 +0000526 struct list_head tcp_ses_list;
527 struct list_head smb_ses_list;
Jeff Laytone7ddee92008-11-14 13:44:38 -0500528 int srv_count; /* reference counter */
Steve Frencha10faeb22005-08-22 21:38:31 -0700529 /* 15 character server name + 0x20 16th byte indicating type = srv */
Jeff Layton8ecaf672008-12-01 15:23:50 -0500530 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
Jeff Layton23db65f2012-05-15 12:20:51 -0400531 struct smb_version_operations *ops;
532 struct smb_version_values *vals;
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500533 enum statusEnum tcpStatus; /* what we think the status is */
Jeff Laytonc359cf32007-11-16 22:22:06 +0000534 char *hostname; /* hostname portion of UNC string */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 struct socket *ssocket;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300536 struct sockaddr_storage dstaddr;
Ben Greear3eb9a882010-09-01 17:06:02 -0700537 struct sockaddr_storage srcaddr; /* locally bind to this IP */
Rob Landleyf1d0c992011-01-22 15:44:05 -0600538#ifdef CONFIG_NET_NS
539 struct net *net;
540#endif
Steve Frenchd38d8c72007-06-28 19:44:13 +0000541 wait_queue_head_t response_q;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
543 struct list_head pending_mid_q;
Steve Frenchedf1ae42008-10-29 00:47:57 +0000544 bool noblocksnd; /* use blocking sendmsg */
545 bool noautotune; /* do not autotune send buf sizes */
Steve French6a5fa2362010-01-01 01:28:43 +0000546 bool tcp_nodelay;
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400547 int credits; /* send no more requests at once */
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300548 unsigned int in_flight; /* number of requests on the wire to server */
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400549 spinlock_t req_lock; /* protect the two values above */
Jeff Layton72ca5452008-12-01 07:09:36 -0500550 struct mutex srv_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 struct task_struct *tsk;
552 char server_GUID[16];
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400553 __u16 sec_mode;
Jeff Layton38d77c52013-05-26 07:01:00 -0400554 bool sign; /* is signing enabled on this connection? */
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500555 bool session_estab; /* mark when very first sess is established */
Pavel Shilovsky28ea5292012-05-23 16:18:00 +0400556#ifdef CONFIG_CIFS_SMB2
557 int echo_credits; /* echo reserved slots */
558 int oplock_credits; /* oplock break reserved slots */
559 bool echoes:1; /* enable echoes */
560#endif
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500561 u16 dialect; /* dialect index that server chose */
Pavel Shilovsky10b9b982012-03-20 12:55:09 +0300562 bool oplocks:1; /* enable oplocks */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 unsigned int maxReq; /* Clients should submit no more */
564 /* than maxReq distinct unanswered SMBs to the server when using */
565 /* multiplexed reads or writes */
566 unsigned int maxBuf; /* maxBuf specifies the maximum */
567 /* message size the server can send or receive for non-raw SMBs */
Steve French7e90d702011-02-08 23:52:32 +0000568 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
569 /* when socket is setup (and during reconnect) before NegProt sent */
Steve Frencheca6acf2009-02-20 05:43:09 +0000570 unsigned int max_rw; /* maxRw specifies the maximum */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 /* message size the server can send or receive for */
572 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400573 unsigned int capabilities; /* selective disabling of caps by smb sess */
Steve Frenchde7ed552006-09-30 13:25:52 +0000574 int timeAdj; /* Adjust for difference in server time zone in sec */
Pavel Shilovsky243d04b2012-03-23 14:28:03 -0400575 __u64 CurrentMid; /* multiplex id - rotating counter */
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -0500576 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
Steve Frencha10faeb22005-08-22 21:38:31 -0700577 /* 16th byte of RFC1001 workstation name is always null */
Jeff Layton8ecaf672008-12-01 15:23:50 -0500578 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
Jeff Laytona0f8b4f2011-01-07 11:30:28 -0500579 __u32 sequence_number; /* for signing, protected by srv_mutex */
Shirish Pargaonkar5f98ca92010-09-18 22:01:58 -0500580 struct session_key session_key;
Steve French3a5ff612006-07-14 22:37:11 +0000581 unsigned long lstrp; /* when we got last response from this server */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500582 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
Jeff Laytone598d1d82013-05-26 07:00:59 -0400583#define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
584#define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
585#define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
586 char negflavor; /* NEGOTIATE response flavor */
Jeff Layton26efa0b2010-04-24 07:57:49 -0400587 /* extended security flavors that server supports */
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500588 bool sec_ntlmssp; /* supports NTLMSSP */
589 bool sec_kerberosu2u; /* supports U2U Kerberos */
Jeff Layton26efa0b2010-04-24 07:57:49 -0400590 bool sec_kerberos; /* supports plain Kerberos */
591 bool sec_mskerberos; /* supports legacy MS Kerberos */
Jeff Layton2a37ef92011-10-19 15:29:23 -0400592 bool large_buf; /* is current buffer large? */
Jeff Laytonc74093b2011-01-11 07:24:23 -0500593 struct delayed_work echo; /* echo ping workqueue job */
Jeff Layton1041e3f2011-10-19 15:28:27 -0400594 struct kvec *iov; /* reusable kvec array for receives */
595 unsigned int nr_iov; /* number of kvecs in array */
Jeff Layton2a37ef92011-10-19 15:29:23 -0400596 char *smallbuf; /* pointer to current "small" buffer */
597 char *bigbuf; /* pointer to current "big" buffer */
598 unsigned int total_read; /* total amount of data read in this pass */
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +0530599#ifdef CONFIG_CIFS_FSCACHE
600 struct fscache_cookie *fscache; /* client index cache cookie */
601#endif
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500602#ifdef CONFIG_CIFS_STATS2
Steve French789e6662011-08-09 18:44:44 +0000603 atomic_t in_send; /* requests trying to send */
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500604 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
605#endif
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400606#ifdef CONFIG_CIFS_SMB2
607 unsigned int max_read;
608 unsigned int max_write;
609#endif /* CONFIG_CIFS_SMB2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610};
611
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300612static inline unsigned int
613in_flight(struct TCP_Server_Info *server)
614{
615 unsigned int num;
616 spin_lock(&server->req_lock);
617 num = server->in_flight;
618 spin_unlock(&server->req_lock);
619 return num;
620}
621
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400622static inline bool
Pavel Shilovskybc205ed2012-03-15 13:22:27 +0300623has_credits(struct TCP_Server_Info *server, int *credits)
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300624{
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400625 int num;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300626 spin_lock(&server->req_lock);
Pavel Shilovskybc205ed2012-03-15 13:22:27 +0300627 num = *credits;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300628 spin_unlock(&server->req_lock);
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400629 return num > 0;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300630}
631
Pavel Shilovsky45275782012-05-17 17:53:29 +0400632static inline void
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400633add_credits(struct TCP_Server_Info *server, const unsigned int add,
634 const int optype)
Pavel Shilovsky45275782012-05-17 17:53:29 +0400635{
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400636 server->ops->add_credits(server, add, optype);
Pavel Shilovsky45275782012-05-17 17:53:29 +0400637}
638
639static inline void
640set_credits(struct TCP_Server_Info *server, const int val)
641{
642 server->ops->set_credits(server, val);
643}
644
Pavel Shilovsky88257362012-05-23 14:01:59 +0400645static inline __u64
Tim Gardner3d378d32013-11-02 12:50:34 -0500646get_next_mid64(struct TCP_Server_Info *server)
Pavel Shilovsky88257362012-05-23 14:01:59 +0400647{
648 return server->ops->get_next_mid(server);
649}
650
Tim Gardner3d378d32013-11-02 12:50:34 -0500651static inline __le16
652get_next_mid(struct TCP_Server_Info *server)
653{
654 __u16 mid = get_next_mid64(server);
655 /*
656 * The value in the SMB header should be little endian for easy
657 * on-the-wire decoding.
658 */
659 return cpu_to_le16(mid);
660}
661
662static inline __u16
663get_mid(const struct smb_hdr *smb)
664{
665 return le16_to_cpu(smb->Mid);
666}
667
668static inline bool
669compare_mid(__u16 mid, const struct smb_hdr *smb)
670{
671 return mid == le16_to_cpu(smb->Mid);
672}
673
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674/*
Pavel Shilovsky24985c52012-09-18 16:20:28 -0700675 * When the server supports very large reads and writes via POSIX extensions,
676 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
677 * including the RFC1001 length.
678 *
679 * Note that this might make for "interesting" allocation problems during
680 * writeback however as we have to allocate an array of pointers for the
681 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
682 *
683 * For reads, there is a similar problem as we need to allocate an array
684 * of kvecs to handle the receive, though that should only need to be done
685 * once.
686 */
687#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
688#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
689
690/*
691 * When the server doesn't allow large posix writes, only allow a rsize/wsize
692 * of 2^17-1 minus the size of the call header. That allows for a read or
693 * write up to the maximum size described by RFC1002.
694 */
695#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
696#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
697
698/*
699 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
700 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
701 * a single wsize request with a single call.
702 */
703#define CIFS_DEFAULT_IOSIZE (1024 * 1024)
704
705/*
706 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
707 * those values when posix extensions aren't in force. In actuality here, we
708 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
709 * to be ok with the extra byte even though Windows doesn't send writes that
710 * are that large.
711 *
712 * Citation:
713 *
714 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
715 */
716#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
717#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
718
719/*
Rob Landleyf1d0c992011-01-22 15:44:05 -0600720 * Macros to allow the TCP_Server_Info->net field and related code to drop out
721 * when CONFIG_NET_NS isn't set.
722 */
723
724#ifdef CONFIG_NET_NS
725
726static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
727{
728 return srv->net;
729}
730
731static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
732{
733 srv->net = net;
734}
735
736#else
737
738static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
739{
740 return &init_net;
741}
742
743static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
744{
745}
746
747#endif
748
749/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 * Session structure. One of these for each uid session with a particular host
751 */
Steve French96daf2b2011-05-27 04:34:02 +0000752struct cifs_ses {
Jeff Layton14fbf502008-11-14 13:53:46 -0500753 struct list_head smb_ses_list;
Steve French3b795212008-11-13 19:45:32 +0000754 struct list_head tcon_list;
Steve Frenchd7b619c2010-02-25 05:36:46 +0000755 struct mutex session_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 struct TCP_Server_Info *server; /* pointer to server info */
Jeff Layton14fbf502008-11-14 13:53:46 -0500757 int ses_count; /* reference counter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 enum statusEnum status;
Steve French750d1152006-06-27 06:28:30 +0000759 unsigned overrideSecFlg; /* if non-zero override global sec flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 __u16 ipc_tid; /* special tid for connection to IPC share */
Steve Frenchad009ac2005-04-28 22:41:05 -0700761 char *serverOS; /* name of operating system underlying server */
762 char *serverNOS; /* name of network operating system of server */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 char *serverDomain; /* security realm of server */
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400764 __u64 Suid; /* remote smb uid */
Eric W. Biederman64ed39d2013-02-06 02:30:39 -0800765 kuid_t linux_uid; /* overriding owner of files on the mount */
766 kuid_t cred_uid; /* owner of credentials */
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400767 unsigned int capabilities;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000768 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
Steve Frenchad009ac2005-04-28 22:41:05 -0700769 TCP names - will ipv6 and sctp addresses fit? */
Steve French34c87902011-03-01 05:02:57 +0000770 char *user_name; /* must not be null except during init of sess
771 and after mount option parsing we fill it */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000772 char *domainName;
773 char *password;
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -0500774 struct session_key auth_key;
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500775 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
Jeff Layton28e11bd2013-05-26 07:01:00 -0400776 enum securityEnum sectype; /* what security flavor was specified? */
777 bool sign; /* is signing required? */
Steve French3b795212008-11-13 19:45:32 +0000778 bool need_reconnect:1; /* connection reset, uid now invalid */
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400779#ifdef CONFIG_CIFS_SMB2
780 __u16 session_flags;
Shirish Pargaonkar32811d22013-08-29 08:35:11 -0500781 char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400782#endif /* CONFIG_CIFS_SMB2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783};
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700784
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400785static inline bool
786cap_unix(struct cifs_ses *ses)
787{
788 return ses->server->vals->cap_unix & ses->capabilities;
789}
790
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791/*
792 * there is one of these for each connection to a resource on a particular
Steve Frenchd38d8c72007-06-28 19:44:13 +0000793 * session
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 */
Steve French96daf2b2011-05-27 04:34:02 +0000795struct cifs_tcon {
Jeff Laytonf1987b42008-11-15 11:12:47 -0500796 struct list_head tcon_list;
797 int tc_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 struct list_head openFileList;
Steve French96daf2b2011-05-27 04:34:02 +0000799 struct cifs_ses *ses; /* pointer to session associated with */
Steve French254e55e2006-06-04 05:53:15 +0000800 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 char *nativeFileSystem;
Jeff Layton00e485b2008-12-05 20:41:21 -0500802 char *password; /* for share-level security */
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400803 __u32 tid; /* The 4 byte tree id */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 __u16 Flags; /* optional support bits */
805 enum statusEnum tidStatus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806#ifdef CONFIG_CIFS_STATS
807 atomic_t num_smbs_sent;
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400808 union {
809 struct {
810 atomic_t num_writes;
811 atomic_t num_reads;
812 atomic_t num_flushes;
813 atomic_t num_oplock_brks;
814 atomic_t num_opens;
815 atomic_t num_closes;
816 atomic_t num_deletes;
817 atomic_t num_mkdirs;
818 atomic_t num_posixopens;
819 atomic_t num_posixmkdirs;
820 atomic_t num_rmdirs;
821 atomic_t num_renames;
822 atomic_t num_t2renames;
823 atomic_t num_ffirst;
824 atomic_t num_fnext;
825 atomic_t num_fclose;
826 atomic_t num_hardlinks;
827 atomic_t num_symlinks;
828 atomic_t num_locks;
829 atomic_t num_acl_get;
830 atomic_t num_acl_set;
831 } cifs_stats;
Pavel Shilovskyd60622e2012-05-28 15:19:39 +0400832#ifdef CONFIG_CIFS_SMB2
833 struct {
834 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
835 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
836 } smb2_stats;
837#endif /* CONFIG_CIFS_SMB2 */
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400838 } stats;
Steve Frencha5a2b482005-08-20 21:42:53 -0700839#ifdef CONFIG_CIFS_STATS2
840 unsigned long long time_writes;
841 unsigned long long time_reads;
842 unsigned long long time_opens;
843 unsigned long long time_deletes;
844 unsigned long long time_closes;
845 unsigned long long time_mkdirs;
846 unsigned long long time_rmdirs;
847 unsigned long long time_renames;
848 unsigned long long time_t2renames;
849 unsigned long long time_ffirst;
850 unsigned long long time_fnext;
851 unsigned long long time_fclose;
852#endif /* CONFIG_CIFS_STATS2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 __u64 bytes_read;
854 __u64 bytes_written;
855 spinlock_t stat_lock;
Steve Frencha5a2b482005-08-20 21:42:53 -0700856#endif /* CONFIG_CIFS_STATS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
Steve French254e55e2006-06-04 05:53:15 +0000858 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
Steve French4b18f2a2008-04-29 00:06:05 +0000860 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
861 bool retry:1;
862 bool nocase:1;
Steve French95b1cb92008-05-15 16:44:38 +0000863 bool seal:1; /* transport encryption for this mounted share */
Steve French4b18f2a2008-04-29 00:06:05 +0000864 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
Steve Frenchc18c8422007-07-18 23:21:09 +0000865 for this mount even if server would support */
Steve French84210e92008-10-23 04:42:37 +0000866 bool local_lease:1; /* check leases (only) on local system not remote */
Steve French64cc2c62009-03-04 19:54:08 +0000867 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
Steve French3b795212008-11-13 19:45:32 +0000868 bool need_reconnect:1; /* connection reset, tid now invalid */
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400869#ifdef CONFIG_CIFS_SMB2
870 bool print:1; /* set if connection to printer share */
871 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
Steve French769ee6a2013-06-19 14:15:30 -0500872 __le32 capabilities;
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400873 __u32 share_flags;
874 __u32 maximal_access;
875 __u32 vol_serial_number;
876 __le64 vol_create_time;
Steven Frenchaf6a12e2013-10-09 20:55:53 -0500877 __u32 ss_flags; /* sector size flags */
878 __u32 perf_sector_size; /* best sector size for perf */
Steve Frenchde9f68d2013-11-15 11:26:24 -0600879 __u32 max_chunks;
880 __u32 max_bytes_chunk;
881 __u32 max_bytes_copy;
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400882#endif /* CONFIG_CIFS_SMB2 */
Suresh Jayaramand03382c2010-07-05 18:12:27 +0530883#ifdef CONFIG_CIFS_FSCACHE
884 u64 resource_id; /* server resource id */
885 struct fscache_cookie *fscache; /* cookie for share */
886#endif
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700887 struct list_head pending_opens; /* list of incomplete opens */
Steve Frenchc18c8422007-07-18 23:21:09 +0000888 /* BB add field for back pointer to sb struct(s)? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889};
890
891/*
Jeff Layton7ffec372010-09-29 19:51:11 -0400892 * This is a refcounted and timestamped container for a tcon pointer. The
893 * container holds a tcon reference. It is considered safe to free one of
894 * these when the tl_count goes to 0. The tl_time is the time of the last
895 * "get" on the container.
896 */
897struct tcon_link {
Jeff Laytonb647c352010-10-28 11:16:44 -0400898 struct rb_node tl_rbnode;
Eric W. Biederman6d4a0832013-02-06 01:48:56 -0800899 kuid_t tl_uid;
Jeff Layton9d002df2010-10-06 19:51:11 -0400900 unsigned long tl_flags;
901#define TCON_LINK_MASTER 0
902#define TCON_LINK_PENDING 1
903#define TCON_LINK_IN_TREE 2
904 unsigned long tl_time;
905 atomic_t tl_count;
Steve French96daf2b2011-05-27 04:34:02 +0000906 struct cifs_tcon *tl_tcon;
Jeff Layton7ffec372010-09-29 19:51:11 -0400907};
908
Jeff Layton9d002df2010-10-06 19:51:11 -0400909extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
Jeff Layton7ffec372010-09-29 19:51:11 -0400910
Steve French96daf2b2011-05-27 04:34:02 +0000911static inline struct cifs_tcon *
Jeff Layton7ffec372010-09-29 19:51:11 -0400912tlink_tcon(struct tcon_link *tlink)
913{
Jeff Layton9d002df2010-10-06 19:51:11 -0400914 return tlink->tl_tcon;
Jeff Layton7ffec372010-09-29 19:51:11 -0400915}
916
Jeff Layton9d002df2010-10-06 19:51:11 -0400917extern void cifs_put_tlink(struct tcon_link *tlink);
Jeff Layton7ffec372010-09-29 19:51:11 -0400918
Jeff Layton13cfb732010-09-29 19:51:11 -0400919static inline struct tcon_link *
920cifs_get_tlink(struct tcon_link *tlink)
921{
Jeff Layton9d002df2010-10-06 19:51:11 -0400922 if (tlink && !IS_ERR(tlink))
923 atomic_inc(&tlink->tl_count);
Jeff Layton13cfb732010-09-29 19:51:11 -0400924 return tlink;
925}
926
Jeff Layton7ffec372010-09-29 19:51:11 -0400927/* This function is always expected to succeed */
Steve French96daf2b2011-05-27 04:34:02 +0000928extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
Jeff Layton7ffec372010-09-29 19:51:11 -0400929
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700930#define CIFS_OPLOCK_NO_CHANGE 0xfe
931
932struct cifs_pending_open {
933 struct list_head olist;
934 struct tcon_link *tlink;
935 __u8 lease_key[16];
936 __u32 oplock;
937};
938
Jeff Layton7ffec372010-09-29 19:51:11 -0400939/*
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000940 * This info hangs off the cifsFileInfo structure, pointed to by llist.
941 * This is used to track byte stream locks on the file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 */
943struct cifsLockInfo {
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000944 struct list_head llist; /* pointer to next cifsLockInfo */
Pavel Shilovsky85160e02011-10-22 15:33:29 +0400945 struct list_head blist; /* pointer to locks blocked on this */
946 wait_queue_head_t block_q;
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000947 __u64 offset;
948 __u64 length;
Pavel Shilovsky03776f42010-08-17 11:26:00 +0400949 __u32 pid;
Pavel Shilovsky04a6aa82012-02-28 14:16:55 +0300950 __u32 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951};
952
953/*
954 * One of these for each open instance of a file
955 */
956struct cifs_search_info {
957 loff_t index_of_last_entry;
958 __u16 entries_in_buffer;
959 __u16 info_level;
960 __u32 resume_key;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000961 char *ntwrk_buf_start;
962 char *srch_entries_start;
Steve French0752f152008-10-07 20:03:33 +0000963 char *last_entry;
Christoph Hellwigeaf35b12011-07-16 15:24:37 -0400964 const char *presume_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 unsigned int resume_name_len;
Steve French4b18f2a2008-04-29 00:06:05 +0000966 bool endOfSearch:1;
967 bool emptyDir:1;
968 bool unicode:1;
969 bool smallBuf:1; /* so we know which buf_release function to call */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970};
971
Pavel Shilovsky226730b2013-07-05 12:00:30 +0400972struct cifs_open_parms {
973 struct cifs_tcon *tcon;
974 struct cifs_sb_info *cifs_sb;
975 int disposition;
976 int desired_access;
977 int create_options;
978 const char *path;
979 struct cifs_fid *fid;
Pavel Shilovsky9cbc0b72013-07-09 18:40:58 +0400980 bool reconnect:1;
Pavel Shilovsky226730b2013-07-05 12:00:30 +0400981};
982
Pavel Shilovsky4b4de762012-09-18 16:20:26 -0700983struct cifs_fid {
984 __u16 netfid;
Pavel Shilovskyf0df7372012-09-18 16:20:26 -0700985#ifdef CONFIG_CIFS_SMB2
986 __u64 persistent_fid; /* persist file id for smb2 */
987 __u64 volatile_fid; /* volatile file id for smb2 */
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700988 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
Pavel Shilovskyf0df7372012-09-18 16:20:26 -0700989#endif
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700990 struct cifs_pending_open *pending_open;
Pavel Shilovsky42873b02013-09-05 21:30:16 +0400991 unsigned int epoch;
992 bool purge_cache;
Pavel Shilovsky4b4de762012-09-18 16:20:26 -0700993};
994
Pavel Shilovskyf45d3412012-09-19 06:22:43 -0700995struct cifs_fid_locks {
996 struct list_head llist;
997 struct cifsFileInfo *cfile; /* fid that owns locks */
998 struct list_head locks; /* locks held by fid above */
999};
1000
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001struct cifsFileInfo {
1002 struct list_head tlist; /* pointer to next fid owned by tcon */
1003 struct list_head flist; /* next fid (file instance) for this inode */
Pavel Shilovskyf45d3412012-09-19 06:22:43 -07001004 struct cifs_fid_locks *llist; /* brlocks held by this fid */
Eric W. Biedermanfef59fd2013-02-06 02:23:02 -08001005 kuid_t uid; /* allows finding which FileInfo structure */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 __u32 pid; /* process id who opened file */
Pavel Shilovsky4b4de762012-09-18 16:20:26 -07001007 struct cifs_fid fid; /* file id from remote */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 /* BB add lock scope info here if needed */ ;
1009 /* lock scope id (0 if none) */
Jeff Laytona5e18bc2010-10-11 15:07:18 -04001010 struct dentry *dentry;
Jeff Layton15886172010-10-15 15:33:59 -04001011 unsigned int f_flags;
Jeff Layton13cfb732010-09-29 19:51:11 -04001012 struct tcon_link *tlink;
Steve French4b18f2a2008-04-29 00:06:05 +00001013 bool invalidHandle:1; /* file closed via session abend */
Jeff Layton3bc303c2009-09-21 06:47:50 -04001014 bool oplock_break_cancelled:1;
Steve French6c0f6212010-10-23 16:51:40 +00001015 int count; /* refcount protected by cifs_file_list_lock */
Steve Frencha6ce4932009-04-09 01:14:32 +00001016 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 struct cifs_search_info srch_inf;
Tejun Heo9b646972010-07-20 22:09:02 +02001018 struct work_struct oplock_break; /* work for oplock breaks */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019};
1020
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +04001021struct cifs_io_parms {
1022 __u16 netfid;
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001023#ifdef CONFIG_CIFS_SMB2
1024 __u64 persistent_fid; /* persist file id for smb2 */
1025 __u64 volatile_fid; /* volatile file id for smb2 */
1026#endif
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +04001027 __u32 pid;
1028 __u64 offset;
1029 unsigned int length;
Steve French96daf2b2011-05-27 04:34:02 +00001030 struct cifs_tcon *tcon;
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +04001031};
1032
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001033struct cifs_readdata;
1034
1035/* asynchronous read support */
1036struct cifs_readdata {
1037 struct kref refcount;
1038 struct list_head list;
1039 struct completion done;
1040 struct cifsFileInfo *cfile;
1041 struct address_space *mapping;
1042 __u64 offset;
1043 unsigned int bytes;
1044 pid_t pid;
1045 int result;
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001046 struct work_struct work;
Jeff Layton8321fec2012-09-19 06:22:32 -07001047 int (*read_into_pages)(struct TCP_Server_Info *server,
1048 struct cifs_readdata *rdata,
1049 unsigned int len);
Jeff Layton58195752012-09-19 06:22:34 -07001050 struct kvec iov;
Jeff Layton8321fec2012-09-19 06:22:32 -07001051 unsigned int pagesz;
1052 unsigned int tailsz;
Jeff Laytonc5fab6f2012-09-19 06:22:30 -07001053 unsigned int nr_pages;
1054 struct page *pages[];
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001055};
1056
Pavel Shilovsky33319142012-09-18 16:20:29 -07001057struct cifs_writedata;
1058
1059/* asynchronous write support */
1060struct cifs_writedata {
1061 struct kref refcount;
1062 struct list_head list;
1063 struct completion done;
1064 enum writeback_sync_modes sync_mode;
1065 struct work_struct work;
1066 struct cifsFileInfo *cfile;
1067 __u64 offset;
1068 pid_t pid;
1069 unsigned int bytes;
1070 int result;
Jeff Laytoneddb0792012-09-18 16:20:35 -07001071 unsigned int pagesz;
1072 unsigned int tailsz;
Pavel Shilovsky33319142012-09-18 16:20:29 -07001073 unsigned int nr_pages;
Jeff Layton26c8f0d2014-02-07 11:04:04 -05001074 struct page *pages[];
Pavel Shilovsky33319142012-09-18 16:20:29 -07001075};
1076
Jeff Layton5f6dbc92010-10-15 15:34:06 -04001077/*
1078 * Take a reference on the file private data. Must be called with
1079 * cifs_file_list_lock held.
1080 */
Jeff Layton764a1b12012-07-25 14:59:54 -04001081static inline void
1082cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
Dave Kleikamp6ab409b2009-08-31 11:07:12 -04001083{
Jeff Layton5f6dbc92010-10-15 15:34:06 -04001084 ++cifs_file->count;
Dave Kleikamp6ab409b2009-08-31 11:07:12 -04001085}
1086
Jeff Layton764a1b12012-07-25 14:59:54 -04001087struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
Jeff Laytonb33879a2010-10-15 15:34:04 -04001088void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
Dave Kleikamp6ab409b2009-08-31 11:07:12 -04001089
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001090#define CIFS_CACHE_READ_FLG 1
1091#define CIFS_CACHE_HANDLE_FLG 2
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001092#define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001093#define CIFS_CACHE_WRITE_FLG 4
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001094#define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1095#define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001096
1097#define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
Pavel Shilovsky53ef1012013-09-05 16:11:28 +04001098#define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001099#define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1100
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101/*
1102 * One of these for each file inode
1103 */
1104
1105struct cifsInodeInfo {
Pavel Shilovskyd59dad22011-09-22 09:53:59 +04001106 bool can_cache_brlcks;
Pavel Shilovskyf45d3412012-09-19 06:22:43 -07001107 struct list_head llist; /* locks helb by this inode */
Pavel Shilovsky1b4b55a2012-09-19 06:22:44 -07001108 struct rw_semaphore lock_sem; /* protect the fields above */
Steve Frenchd38d8c72007-06-28 19:44:13 +00001109 /* BB add in lists for dirty pages i.e. write caching info for oplock */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 struct list_head openFileList;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001112 unsigned int oplock; /* oplock/lease level we have */
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001113 unsigned int epoch; /* used to track lease state changes */
Jeff Laytonaae62fd2011-01-20 13:36:50 -05001114 bool delete_pending; /* DELETE_ON_CLOSE is set */
1115 bool invalid_mapping; /* pagecache is invalid */
1116 unsigned long time; /* jiffies of last update of inode */
Jeff Layton597b0272012-03-23 14:40:56 -04001117 u64 server_eof; /* current file size on server -- protected by i_lock */
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001118 u64 uniqueid; /* server inode number */
Jeff Layton20054bd2011-01-07 11:30:27 -05001119 u64 createtime; /* creation time on server */
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001120#ifdef CONFIG_CIFS_SMB2
1121 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1122#endif
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +05301123#ifdef CONFIG_CIFS_FSCACHE
1124 struct fscache_cookie *fscache;
1125#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 struct inode vfs_inode;
1127};
1128
1129static inline struct cifsInodeInfo *
1130CIFS_I(struct inode *inode)
1131{
1132 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1133}
1134
1135static inline struct cifs_sb_info *
1136CIFS_SB(struct super_block *sb)
1137{
1138 return sb->s_fs_info;
1139}
1140
Steve Frenchab2f2182005-09-15 20:44:50 -07001141static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
Jeremy Allisonac670552005-06-22 17:26:35 -07001142{
1143 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1144 return '/';
1145 else
1146 return '\\';
1147}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148
Steve Frenchf87d39d2011-05-27 03:50:55 +00001149static inline void
1150convert_delimiter(char *path, char delim)
1151{
Steve French1cc9bd62012-11-29 18:07:51 -06001152 char old_delim, *pos;
Steve Frenchf87d39d2011-05-27 03:50:55 +00001153
1154 if (delim == '/')
1155 old_delim = '\\';
1156 else
1157 old_delim = '/';
1158
Steve French1cc9bd62012-11-29 18:07:51 -06001159 pos = path;
1160 while ((pos = strchr(pos, old_delim)))
1161 *pos = delim;
Steve Frenchf87d39d2011-05-27 03:50:55 +00001162}
1163
Steve Frencha4544342005-08-24 13:59:35 -07001164#ifdef CONFIG_CIFS_STATS
1165#define cifs_stats_inc atomic_inc
1166
Steve French96daf2b2011-05-27 04:34:02 +00001167static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
Steve Frencha4544342005-08-24 13:59:35 -07001168 unsigned int bytes)
1169{
1170 if (bytes) {
1171 spin_lock(&tcon->stat_lock);
1172 tcon->bytes_written += bytes;
1173 spin_unlock(&tcon->stat_lock);
1174 }
1175}
1176
Steve French96daf2b2011-05-27 04:34:02 +00001177static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
Steve Frencha4544342005-08-24 13:59:35 -07001178 unsigned int bytes)
1179{
1180 spin_lock(&tcon->stat_lock);
1181 tcon->bytes_read += bytes;
1182 spin_unlock(&tcon->stat_lock);
1183}
1184#else
1185
Steve Frenchd38d8c72007-06-28 19:44:13 +00001186#define cifs_stats_inc(field) do {} while (0)
1187#define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1188#define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
Steve Frencha4544342005-08-24 13:59:35 -07001189
1190#endif
1191
Jeff Layton2b84a36c2011-01-11 07:24:21 -05001192
1193/*
Jeff Layton44d22d82011-10-19 15:29:49 -04001194 * This is the prototype for the mid receive function. This function is for
1195 * receiving the rest of the SMB frame, starting with the WordCount (which is
1196 * just after the MID in struct smb_hdr). Note:
1197 *
1198 * - This will be called by cifsd, with no locks held.
1199 * - The mid will still be on the pending_mid_q.
1200 * - mid->resp_buf will point to the current buffer.
1201 *
1202 * Returns zero on a successful receive, or an error. The receive state in
1203 * the TCP_Server_Info will also be updated.
1204 */
1205typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1206 struct mid_q_entry *mid);
1207
1208/*
1209 * This is the prototype for the mid callback function. This is called once the
1210 * mid has been received off of the socket. When creating one, take special
1211 * care to avoid deadlocks. Things to bear in mind:
Jeff Layton2b84a36c2011-01-11 07:24:21 -05001212 *
Jeff Layton3c1105d2011-05-22 07:09:13 -04001213 * - it will be called by cifsd, with no locks held
1214 * - the mid will be removed from any lists
Jeff Layton2b84a36c2011-01-11 07:24:21 -05001215 */
1216typedef void (mid_callback_t)(struct mid_q_entry *mid);
1217
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218/* one of these for every pending CIFS request to the server */
1219struct mid_q_entry {
1220 struct list_head qhead; /* mids waiting on reply from this server */
Pavel Shilovsky2dc7e1c2011-12-26 22:53:34 +04001221 struct TCP_Server_Info *server; /* server corresponding to this mid */
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -04001222 __u64 mid; /* multiplex id */
1223 __u32 pid; /* process id */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 __u32 sequence_number; /* for CIFS signing */
Steve French1047abc2005-10-11 19:58:06 -07001225 unsigned long when_alloc; /* when mid was created */
1226#ifdef CONFIG_CIFS_STATS2
1227 unsigned long when_sent; /* time when smb send finished */
1228 unsigned long when_received; /* when demux complete (taken off wire) */
1229#endif
Jeff Layton44d22d82011-10-19 15:29:49 -04001230 mid_receive_t *receive; /* call receive callback */
Jeff Layton2b84a36c2011-01-11 07:24:21 -05001231 mid_callback_t *callback; /* call completion callback */
1232 void *callback_data; /* general purpose pointer for callback */
Pavel Shilovskyd4e48542012-03-23 14:28:02 -04001233 void *resp_buf; /* pointer to received SMB header */
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -04001234 int mid_state; /* wish this were enum but can not pass to wait_event */
1235 __le16 command; /* smb command code */
1236 bool large_buf:1; /* if valid response, is pointer to large buf */
Steve French4b18f2a2008-04-29 00:06:05 +00001237 bool multiRsp:1; /* multiple trans2 responses for one request */
1238 bool multiEnd:1; /* both received */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239};
1240
Steve French789e6662011-08-09 18:44:44 +00001241/* Make code in transport.c a little cleaner by moving
1242 update of optional stats into function below */
1243#ifdef CONFIG_CIFS_STATS2
1244
1245static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1246{
1247 atomic_inc(&server->in_send);
1248}
1249
1250static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1251{
1252 atomic_dec(&server->in_send);
1253}
1254
1255static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1256{
1257 atomic_inc(&server->num_waiters);
1258}
1259
1260static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1261{
1262 atomic_dec(&server->num_waiters);
1263}
1264
1265static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1266{
1267 mid->when_sent = jiffies;
1268}
1269#else
1270static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1271{
1272}
1273static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1274{
1275}
1276
1277static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1278{
1279}
1280
1281static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1282{
1283}
1284
1285static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1286{
1287}
1288#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289
Steve Frenchff5dbd92005-08-24 17:10:36 -07001290/* for pending dnotify requests */
1291struct dir_notify_req {
Steve French13cd4b72010-10-07 18:46:32 +00001292 struct list_head lhead;
1293 __le16 Pid;
1294 __le16 PidHigh;
1295 __u16 Mid;
1296 __u16 Tid;
1297 __u16 Uid;
1298 __u16 netfid;
1299 __u32 filter; /* CompletionFilter (for multishot) */
1300 int multishot;
1301 struct file *pfile;
Steve Frenchff5dbd92005-08-24 17:10:36 -07001302};
1303
Steve French366781c2008-01-25 10:12:41 +00001304struct dfs_info3_param {
1305 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
Igor Mammedov8aad0182008-02-15 18:21:49 +00001306 int path_consumed;
Steve French366781c2008-01-25 10:12:41 +00001307 int server_type;
1308 int ref_flag;
1309 char *path_name;
1310 char *node_name;
1311};
1312
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001313/*
1314 * common struct for holding inode info when searching for or updating an
1315 * inode with new info
1316 */
1317
1318#define CIFS_FATTR_DFS_REFERRAL 0x1
Jeff Layton0b8f18e2009-07-09 01:46:37 -04001319#define CIFS_FATTR_DELETE_PENDING 0x2
1320#define CIFS_FATTR_NEED_REVAL 0x4
Jeff Layton3d694382010-05-11 14:59:55 -04001321#define CIFS_FATTR_INO_COLLISION 0x8
Jim McDonough74d290d2013-09-21 10:36:10 -05001322#define CIFS_FATTR_UNKNOWN_NLINK 0x10
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001323
1324struct cifs_fattr {
1325 u32 cf_flags;
1326 u32 cf_cifsattrs;
1327 u64 cf_uniqueid;
1328 u64 cf_eof;
1329 u64 cf_bytes;
Jeff Layton20054bd2011-01-07 11:30:27 -05001330 u64 cf_createtime;
Eric W. Biederman4a2c8cf2013-02-06 01:53:25 -08001331 kuid_t cf_uid;
1332 kgid_t cf_gid;
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001333 umode_t cf_mode;
1334 dev_t cf_rdev;
1335 unsigned int cf_nlink;
1336 unsigned int cf_dtype;
1337 struct timespec cf_atime;
1338 struct timespec cf_mtime;
1339 struct timespec cf_ctime;
1340};
1341
Steve French366781c2008-01-25 10:12:41 +00001342static inline void free_dfs_info_param(struct dfs_info3_param *param)
1343{
1344 if (param) {
1345 kfree(param->path_name);
1346 kfree(param->node_name);
1347 kfree(param);
1348 }
1349}
1350
1351static inline void free_dfs_info_array(struct dfs_info3_param *param,
1352 int number_of_items)
1353{
1354 int i;
1355 if ((number_of_items == 0) || (param == NULL))
1356 return;
1357 for (i = 0; i < number_of_items; i++) {
1358 kfree(param[i].path_name);
1359 kfree(param[i].node_name);
1360 }
1361 kfree(param);
1362}
1363
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364#define MID_FREE 0
1365#define MID_REQUEST_ALLOCATED 1
1366#define MID_REQUEST_SUBMITTED 2
1367#define MID_RESPONSE_RECEIVED 4
1368#define MID_RETRY_NEEDED 8 /* session closed while this request out */
Jeff Layton71823ba2011-02-10 08:03:50 -05001369#define MID_RESPONSE_MALFORMED 0x10
Jeff Layton3c1105d2011-05-22 07:09:13 -04001370#define MID_SHUTDOWN 0x20
Steve Frenchec637e32005-12-12 20:53:18 -08001371
1372/* Types of response buffer returned from SendReceive2 */
1373#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1374#define CIFS_SMALL_BUFFER 1
1375#define CIFS_LARGE_BUFFER 2
1376#define CIFS_IOVEC 4 /* array of response buffers */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377
Steve French133672e2007-11-13 22:41:37 +00001378/* Type of Request to SendReceive2 */
Jeff Layton77499812011-01-11 07:24:23 -05001379#define CIFS_BLOCKING_OP 1 /* operation can block */
1380#define CIFS_ASYNC_OP 2 /* do not wait for response */
1381#define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
Steve French133672e2007-11-13 22:41:37 +00001382#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1383#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1384#define CIFS_NO_RESP 0x040 /* no response buffer required */
1385
Pavel Shilovskya891f0f2012-05-23 16:14:34 +04001386/* Type of request operation */
1387#define CIFS_ECHO_OP 0x080 /* echo request */
1388#define CIFS_OBREAK_OP 0x0100 /* oplock break request */
Pavel Shilovskyec2e4522011-12-27 16:12:43 +04001389#define CIFS_NEG_OP 0x0200 /* negotiate request */
1390#define CIFS_OP_MASK 0x0380 /* mask request type */
Pavel Shilovskya891f0f2012-05-23 16:14:34 +04001391
Steve French39798772006-05-31 22:40:51 +00001392/* Security Flags: indicate type of session setup needed */
1393#define CIFSSEC_MAY_SIGN 0x00001
1394#define CIFSSEC_MAY_NTLM 0x00002
1395#define CIFSSEC_MAY_NTLMV2 0x00004
1396#define CIFSSEC_MAY_KRB5 0x00008
1397#ifdef CONFIG_CIFS_WEAK_PW_HASH
1398#define CIFSSEC_MAY_LANMAN 0x00010
1399#define CIFSSEC_MAY_PLNTXT 0x00020
Steve French516897a2007-10-12 19:24:06 +00001400#else
1401#define CIFSSEC_MAY_LANMAN 0
1402#define CIFSSEC_MAY_PLNTXT 0
Steve French39798772006-05-31 22:40:51 +00001403#endif /* weak passwords */
1404#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
Steve Frenchac683922009-05-06 04:16:04 +00001405#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
Steve French5815449d2006-02-14 01:36:20 +00001406
Steve French39798772006-05-31 22:40:51 +00001407#define CIFSSEC_MUST_SIGN 0x01001
1408/* note that only one of the following can be set so the
1409result of setting MUST flags more than once will be to
1410require use of the stronger protocol */
1411#define CIFSSEC_MUST_NTLM 0x02002
1412#define CIFSSEC_MUST_NTLMV2 0x04004
1413#define CIFSSEC_MUST_KRB5 0x08008
1414#ifdef CONFIG_CIFS_WEAK_PW_HASH
1415#define CIFSSEC_MUST_LANMAN 0x10010
1416#define CIFSSEC_MUST_PLNTXT 0x20020
Jeff Layton0d3a01f2007-10-16 17:32:19 +00001417#ifdef CONFIG_CIFS_UPCALL
Chuck Ebbert20d17522009-09-15 01:53:21 -04001418#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
Steve Frenchd38d8c72007-06-28 19:44:13 +00001419#else
Chuck Ebbert20d17522009-09-15 01:53:21 -04001420#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
Steve French016ec752007-10-16 18:10:10 +00001421#endif /* UPCALL */
Jeff Layton0d3a01f2007-10-16 17:32:19 +00001422#else /* do not allow weak pw hash */
Steve French88a44122012-01-18 17:13:47 -06001423#define CIFSSEC_MUST_LANMAN 0
1424#define CIFSSEC_MUST_PLNTXT 0
Jeff Layton0d3a01f2007-10-16 17:32:19 +00001425#ifdef CONFIG_CIFS_UPCALL
Steve Frenchac683922009-05-06 04:16:04 +00001426#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
Jeff Layton0d3a01f2007-10-16 17:32:19 +00001427#else
Steve Frenchac683922009-05-06 04:16:04 +00001428#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
Steve French016ec752007-10-16 18:10:10 +00001429#endif /* UPCALL */
Steve French39798772006-05-31 22:40:51 +00001430#endif /* WEAK_PW_HASH */
1431#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
Steve Frenchac683922009-05-06 04:16:04 +00001432#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
Steve French39798772006-05-31 22:40:51 +00001433
Jeff Layton896a8fc2013-05-26 07:01:01 -04001434#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
Shirish Pargaonkaref571ca2008-07-24 15:56:05 +00001435#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
Steve Frenchac683922009-05-06 04:16:04 +00001436#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 -07001437/*
1438 *****************************************************************
1439 * All constants go here
1440 *****************************************************************
1441 */
1442
1443#define UID_HASH (16)
1444
1445/*
1446 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1447 * following to be declared.
1448 */
1449
1450/****************************************************************************
1451 * Locking notes. All updates to global variables and lists should be
1452 * protected by spinlocks or semaphores.
1453 *
1454 * Spinlocks
1455 * ---------
1456 * GlobalMid_Lock protects:
1457 * list operations on pending_mid_q and oplockQ
1458 * updates to XID counters, multiplex id and SMB sequence numbers
Suresh Jayaraman6573e9b2010-10-18 23:52:18 +05301459 * cifs_file_list_lock protects:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 * list operations on tcp and SMB session lists and tCon lists
1461 * f_owner.lock protects certain per file struct operations
1462 * mapping->page_lock protects certain per page operations
1463 *
1464 * Semaphores
1465 * ----------
1466 * sesSem operations on smb session
1467 * tconSem operations on tree connection
Steve Frenchd38d8c72007-06-28 19:44:13 +00001468 * fh_sem file handle reconnection operations
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 *
1470 ****************************************************************************/
1471
1472#ifdef DECLARE_GLOBALS_HERE
1473#define GLOBAL_EXTERN
1474#else
1475#define GLOBAL_EXTERN extern
1476#endif
1477
Jeff Laytone7ddee92008-11-14 13:44:38 -05001478/*
1479 * the list of TCP_Server_Info structures, ie each of the sockets
Steve Frenchfb396012008-11-13 20:04:07 +00001480 * connecting our client to a distinct server (ip address), is
Jeff Laytone7ddee92008-11-14 13:44:38 -05001481 * chained together by cifs_tcp_ses_list. The list of all our SMB
Steve Frenchfb396012008-11-13 20:04:07 +00001482 * sessions (and from that the tree connections) can be found
Jeff Laytone7ddee92008-11-14 13:44:38 -05001483 * by iterating over cifs_tcp_ses_list
1484 */
1485GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1486
Jeff Laytonf1987b42008-11-15 11:12:47 -05001487/*
1488 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1489 * tcp session, and the list of tcon's per smb session. It also protects
1490 * the reference counters for the server, smb session, and tcon. Finally,
1491 * changes to the tcon->tidStatus should be done while holding this lock.
1492 */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301493GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
Steve Frenchddb4cbf2008-11-20 20:00:44 +00001494
1495/*
1496 * This lock protects the cifs_file->llist and cifs_file->flist
1497 * list operations, and updates to some flags (cifs_file->invalidHandle)
1498 * It will be moved to either use the tcon->stat_lock or equivalent later.
1499 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1500 * the cifs_tcp_ses_lock must be grabbed first and released last.
1501 */
Jeff Layton44772882010-10-15 15:34:03 -04001502GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503
Steve French0eff0e22011-02-24 05:39:23 +00001504#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
Steve French99ee4db2007-02-27 05:35:17 +00001505/* Outstanding dir notify requests */
1506GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1507/* DirNotify response queue */
1508GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
Steve French0eff0e22011-02-24 05:39:23 +00001509#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
Steve Frenchff5dbd92005-08-24 17:10:36 -07001510
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511/*
1512 * Global transaction id (XID) information
1513 */
1514GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +00001515GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +00001517GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1518 /* on midQ entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519/*
1520 * Global counters, updated atomically
1521 */
1522GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1523GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1524GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1525GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1526GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1527
Steve Frenchaaa9bbe2008-05-23 17:38:32 +00001528/* Various Debug counters */
Steve French4498eed52005-12-03 13:58:57 -08001529GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1530#ifdef CONFIG_CIFS_STATS2
1531GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1532GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1533#endif
1534GLOBAL_EXTERN atomic_t smBufAllocCount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535GLOBAL_EXTERN atomic_t midCount;
1536
1537/* Misc globals */
Jeff Layton5e500ed2012-05-16 07:13:17 -04001538GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539GLOBAL_EXTERN unsigned int lookupCacheEnabled;
Jeff Layton04912d62010-04-24 07:57:45 -04001540GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541 with more secure ntlmssp2 challenge/resp */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1544GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1545GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1546GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1547GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1548
Shirish Pargaonkar21fed0d2011-08-09 14:30:48 -05001549#ifdef CONFIG_CIFS_ACL
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001550GLOBAL_EXTERN struct rb_root uidtree;
1551GLOBAL_EXTERN struct rb_root gidtree;
1552GLOBAL_EXTERN spinlock_t siduidlock;
1553GLOBAL_EXTERN spinlock_t sidgidlock;
Shirish Pargaonkar21fed0d2011-08-09 14:30:48 -05001554GLOBAL_EXTERN struct rb_root siduidtree;
1555GLOBAL_EXTERN struct rb_root sidgidtree;
1556GLOBAL_EXTERN spinlock_t uidsidlock;
1557GLOBAL_EXTERN spinlock_t gidsidlock;
1558#endif /* CONFIG_CIFS_ACL */
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001559
Tejun Heo9b646972010-07-20 22:09:02 +02001560void cifs_oplock_break(struct work_struct *work);
Linus Torvalds3b7433b2010-08-07 12:42:58 -07001561
Jeff Layton3bc303c2009-09-21 06:47:50 -04001562extern const struct slow_work_ops cifs_oplock_break_ops;
Jeff Laytonda472fc2012-03-23 14:40:53 -04001563extern struct workqueue_struct *cifsiod_wq;
Suresh Jayaramanabd2e442010-06-22 20:52:50 +05301564
Pavel Shilovsky2dc7e1c2011-12-26 22:53:34 +04001565extern mempool_t *cifs_mid_poolp;
1566
Jeff Layton23db65f2012-05-15 12:20:51 -04001567/* Operations for different SMB versions */
1568#define SMB1_VERSION_STRING "1.0"
1569extern struct smb_version_operations smb1_operations;
1570extern struct smb_version_values smb1_values;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001571#define SMB20_VERSION_STRING "2.0"
Pavel Shilovsky53ef1012013-09-05 16:11:28 +04001572extern struct smb_version_operations smb20_operations;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001573extern struct smb_version_values smb20_values;
Steve French1080ef72011-02-24 18:07:19 +00001574#define SMB21_VERSION_STRING "2.1"
1575extern struct smb_version_operations smb21_operations;
1576extern struct smb_version_values smb21_values;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001577#define SMB30_VERSION_STRING "3.0"
Steve French38107d42012-12-08 22:08:06 -06001578extern struct smb_version_operations smb30_operations;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001579extern struct smb_version_values smb30_values;
Steve French20b6d8b2013-06-12 22:48:41 -05001580#define SMB302_VERSION_STRING "3.02"
1581/*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1582extern struct smb_version_values smb302_values;
Suresh Jayaramanabd2e442010-06-22 20:52:50 +05301583#endif /* _CIFS_GLOB_H */