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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
Pavel Shilovsky9094fad2012-07-12 18:30:44 +040073/* SMB echo "timeout" -- FIXME: tunable? */
74#define SMB_ECHO_INTERVAL (60 * HZ)
75
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#include "cifspdu.h"
77
Linus Torvalds1da177e2005-04-16 15:20:36 -070078#ifndef XATTR_DOS_ATTRIB
79#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
80#endif
81
82/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 * CIFS vfs client Status information (based on what we know.)
84 */
85
Steve French6c0f6212010-10-23 16:51:40 +000086/* associated with each tcp and smb session */
Linus Torvalds1da177e2005-04-16 15:20:36 -070087enum statusEnum {
88 CifsNew = 0,
89 CifsGood,
90 CifsExiting,
Steve Frenchfd88ce92011-04-12 01:01:14 +000091 CifsNeedReconnect,
92 CifsNeedNegotiate
Linus Torvalds1da177e2005-04-16 15:20:36 -070093};
94
95enum securityEnum {
Jeff Layton515d82f2013-05-26 07:00:58 -040096 Unspecified = 0, /* not specified */
97 LANMAN, /* Legacy LANMAN auth */
Steve French39798772006-05-31 22:40:51 +000098 NTLM, /* Legacy NTLM012 auth with NTLM hash */
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
Steve Frenchac683922009-05-06 04:16:04 +0000100 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
Steve Frenchc16fefa2008-08-19 19:35:33 +0000101 Kerberos, /* Kerberos via SPNEGO */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102};
103
Shirish Pargaonkar5f98ca92010-09-18 22:01:58 -0500104struct session_key {
Steve Frenchb609f062007-07-09 07:55:14 +0000105 unsigned int len;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500106 char *response;
Steve Frenchb609f062007-07-09 07:55:14 +0000107};
108
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500109/* crypto security descriptor definition */
110struct sdesc {
111 struct shash_desc shash;
112 char ctx[];
113};
114
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -0500115/* crypto hashing related structure/fields, not specific to a sec mech */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500116struct cifs_secmech {
117 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
118 struct crypto_shash *md5; /* md5 hash function */
Pavel Shilovsky3c1bf7e2012-09-18 16:20:30 -0700119 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
Steve French429b46f2013-06-26 23:45:05 -0500120 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500121 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
122 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
Pavel Shilovsky3c1bf7e2012-09-18 16:20:30 -0700123 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
Steve French429b46f2013-06-26 23:45:05 -0500124 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500125};
126
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500127/* per smb session structure/fields */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500128struct ntlmssp_auth {
Shirish Pargaonkar5c234aa2013-08-29 08:35:10 -0500129 bool sesskey_per_smbsess; /* whether session key is per smb session */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500130 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
131 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
132 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500133 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500134};
135
Steve French442aa312007-09-24 20:25:46 +0000136struct cifs_cred {
137 int uid;
138 int gid;
139 int mode;
140 int cecount;
141 struct cifs_sid osid;
142 struct cifs_sid gsid;
143 struct cifs_ntace *ntaces;
144 struct cifs_ace *aces;
145};
146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147/*
148 *****************************************************************
149 * Except the CIFS PDUs themselves all the
150 * globally interesting structs should go here
151 *****************************************************************
152 */
153
Jeff Laytonbf5ea0e2012-09-18 16:20:34 -0700154/*
155 * A smb_rqst represents a complete request to be issued to a server. It's
156 * formed by a kvec array, followed by an array of pages. Page data is assumed
157 * to start at the beginning of the first page.
158 */
159struct smb_rqst {
160 struct kvec *rq_iov; /* array of kvecs */
161 unsigned int rq_nvec; /* number of kvecs in array */
162 struct page **rq_pages; /* pointer to array of page ptrs */
163 unsigned int rq_npages; /* number pages in array */
164 unsigned int rq_pagesz; /* page size to use */
165 unsigned int rq_tailsz; /* length of last page */
166};
167
Jeff Layton23db65f2012-05-15 12:20:51 -0400168enum smb_version {
169 Smb_1 = 1,
Steve Frenchdd446b12012-11-28 23:21:06 -0600170 Smb_20,
Steve French1080ef72011-02-24 18:07:19 +0000171 Smb_21,
Steve Frenche4aa25e2012-10-01 12:26:22 -0500172 Smb_30,
Steve French20b6d8b2013-06-12 22:48:41 -0500173 Smb_302,
Jeff Layton23db65f2012-05-15 12:20:51 -0400174};
175
Jeff Layton121b0462012-05-15 12:21:10 -0400176struct mid_q_entry;
177struct TCP_Server_Info;
Pavel Shilovsky55157df2012-02-28 14:04:17 +0300178struct cifsFileInfo;
Pavel Shilovsky082d0642012-05-17 12:18:21 +0400179struct cifs_ses;
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +0400180struct cifs_tcon;
Pavel Shilovskyb669f332012-05-27 20:21:53 +0400181struct dfs_info3_param;
Pavel Shilovsky1208ef12012-05-27 17:34:43 +0400182struct cifs_fattr;
Pavel Shilovsky9224dfc2012-05-27 20:39:52 +0400183struct smb_vol;
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700184struct cifs_fid;
Pavel Shilovskyfc9c5962012-09-18 16:20:28 -0700185struct cifs_readdata;
Pavel Shilovskyc9de5c82012-09-18 16:20:29 -0700186struct cifs_writedata;
Pavel Shilovskyf9c6e232012-09-18 16:20:29 -0700187struct cifs_io_parms;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700188struct cifs_search_info;
Pavel Shilovsky95a3f2f2012-09-18 16:20:33 -0700189struct cifsInodeInfo;
Pavel Shilovsky226730b2013-07-05 12:00:30 +0400190struct cifs_open_parms;
Jeff Layton121b0462012-05-15 12:21:10 -0400191
Jeff Layton23db65f2012-05-15 12:20:51 -0400192struct smb_version_operations {
Jeff Layton121b0462012-05-15 12:21:10 -0400193 int (*send_cancel)(struct TCP_Server_Info *, void *,
194 struct mid_q_entry *);
Pavel Shilovsky55157df2012-02-28 14:04:17 +0300195 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
Pavel Shilovsky082d0642012-05-17 12:18:21 +0400196 /* setup request: allocate mid, sign message */
Jeff Laytonfec344e2012-09-18 16:20:35 -0700197 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
198 struct smb_rqst *);
Pavel Shilovsky45740842012-06-01 14:26:18 +0400199 /* setup async request: allocate mid, sign message */
Jeff Laytonfec344e2012-09-18 16:20:35 -0700200 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
201 struct smb_rqst *);
Pavel Shilovsky082d0642012-05-17 12:18:21 +0400202 /* check response: verify signature, map error */
203 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
204 bool);
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400205 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
206 const int);
Pavel Shilovsky45275782012-05-17 17:53:29 +0400207 void (*set_credits)(struct TCP_Server_Info *, const int);
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400208 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
209 unsigned int (*get_credits)(struct mid_q_entry *);
Pavel Shilovsky88257362012-05-23 14:01:59 +0400210 __u64 (*get_next_mid)(struct TCP_Server_Info *);
Pavel Shilovskyeb378712012-05-17 13:02:51 +0400211 /* data offset from read response message */
212 unsigned int (*read_data_offset)(char *);
213 /* data length from read response message */
214 unsigned int (*read_data_length)(char *);
215 /* map smb to linux error */
216 int (*map_error)(char *, bool);
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400217 /* find mid corresponding to the response message */
218 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
219 void (*dump_detail)(void *);
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400220 void (*clear_stats)(struct cifs_tcon *);
221 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
Steve French769ee6a2013-06-19 14:15:30 -0500222 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400223 /* verify the message */
224 int (*check_message)(char *, unsigned int);
225 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000226 void (*downgrade_oplock)(struct TCP_Server_Info *,
227 struct cifsInodeInfo *, bool);
Pavel Shilovsky316cf942012-05-23 14:31:03 +0400228 /* process transaction2 response */
229 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
230 char *, int);
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400231 /* check if we need to negotiate */
232 bool (*need_neg)(struct TCP_Server_Info *);
233 /* negotiate to the server */
234 int (*negotiate)(const unsigned int, struct cifs_ses *);
Pavel Shilovsky24985c52012-09-18 16:20:28 -0700235 /* set negotiated write size */
236 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
237 /* set negotiated read size */
238 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
Pavel Shilovsky58c45c52012-05-25 10:54:49 +0400239 /* setup smb sessionn */
240 int (*sess_setup)(const unsigned int, struct cifs_ses *,
241 const struct nls_table *);
242 /* close smb session */
243 int (*logoff)(const unsigned int, struct cifs_ses *);
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +0400244 /* connect to a server share */
245 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
246 struct cifs_tcon *, const struct nls_table *);
247 /* close tree connecion */
248 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
Pavel Shilovskyb669f332012-05-27 20:21:53 +0400249 /* get DFS referrals */
250 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
251 const char *, struct dfs_info3_param **,
252 unsigned int *, const struct nls_table *, int);
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +0400253 /* informational QFS call */
254 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
Pavel Shilovsky68889f22012-05-25 14:40:22 +0400255 /* check if a path is accessible or not */
256 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
257 struct cifs_sb_info *, const char *);
Pavel Shilovsky1208ef12012-05-27 17:34:43 +0400258 /* query path data from the server */
259 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
260 struct cifs_sb_info *, const char *,
Pavel Shilovskyeb85d94b2013-10-23 17:49:47 +0400261 FILE_ALL_INFO *, bool *, bool *);
Pavel Shilovsky4ad65042012-09-18 16:20:26 -0700262 /* query file data from the server */
263 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
264 struct cifs_fid *, FILE_ALL_INFO *);
Pavel Shilovsky1208ef12012-05-27 17:34:43 +0400265 /* get server index number */
266 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
267 struct cifs_sb_info *, const char *,
268 u64 *uniqueid, FILE_ALL_INFO *);
Pavel Shilovskyd1433412012-09-18 16:20:31 -0700269 /* set size by path */
270 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
271 const char *, __u64, struct cifs_sb_info *, bool);
272 /* set size by file handle */
273 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
274 struct cifsFileInfo *, __u64, bool);
Pavel Shilovsky6bdf6db2012-09-18 16:20:32 -0700275 /* set attributes */
276 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
277 const unsigned int);
Steve French64a5cfa2013-10-14 15:31:32 -0500278 int (*set_compression)(const unsigned int, struct cifs_tcon *,
279 struct cifsFileInfo *);
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400280 /* check if we can send an echo or nor */
281 bool (*can_echo)(struct TCP_Server_Info *);
282 /* send echo request */
283 int (*echo)(struct TCP_Server_Info *);
Pavel Shilovskyf4367202012-03-17 11:41:12 +0300284 /* create directory */
285 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
286 struct cifs_sb_info *);
287 /* set info on created directory */
288 void (*mkdir_setinfo)(struct inode *, const char *,
289 struct cifs_sb_info *, struct cifs_tcon *,
290 const unsigned int);
Pavel Shilovskyf958ca52012-07-10 16:14:18 +0400291 /* remove directory */
292 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
293 struct cifs_sb_info *);
Pavel Shilovskyed6875e2012-09-18 16:20:25 -0700294 /* unlink file */
295 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
296 struct cifs_sb_info *);
297 /* open, rename and delete file */
298 int (*rename_pending_delete)(const char *, struct dentry *,
299 const unsigned int);
Pavel Shilovsky8ceb9842012-09-18 16:20:30 -0700300 /* send rename request */
301 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
302 const char *, struct cifs_sb_info *);
Steve Frenchd6e906f2012-09-18 16:20:31 -0700303 /* send create hardlink request */
304 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
305 const char *, const char *,
306 struct cifs_sb_info *);
Pavel Shilovskyb42bf882013-08-14 19:25:21 +0400307 /* query symlink target */
308 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
309 const char *, char **, struct cifs_sb_info *);
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700310 /* open a file for non-posix mounts */
Pavel Shilovsky226730b2013-07-05 12:00:30 +0400311 int (*open)(const unsigned int, struct cifs_open_parms *,
312 __u32 *, FILE_ALL_INFO *);
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700313 /* set fid protocol-specific info */
314 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
Pavel Shilovsky0ff78a22012-09-18 16:20:26 -0700315 /* close a file */
Pavel Shilovsky760ad0c2012-09-25 11:00:07 +0400316 void (*close)(const unsigned int, struct cifs_tcon *,
317 struct cifs_fid *);
Pavel Shilovsky1d8c4c02012-09-18 16:20:27 -0700318 /* send a flush request to the server */
319 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
Pavel Shilovskyfc9c5962012-09-18 16:20:28 -0700320 /* async read from the server */
321 int (*async_readv)(struct cifs_readdata *);
Pavel Shilovskyc9de5c82012-09-18 16:20:29 -0700322 /* async write to the server */
Steve French4a5c80d2014-02-07 20:45:12 -0600323 int (*async_writev)(struct cifs_writedata *,
324 void (*release)(struct kref *));
Pavel Shilovskyf9c6e232012-09-18 16:20:29 -0700325 /* sync read from the server */
Steve Frenchdb8b6312014-09-22 05:13:55 -0500326 int (*sync_read)(const unsigned int, struct cifs_fid *,
Pavel Shilovskyf9c6e232012-09-18 16:20:29 -0700327 struct cifs_io_parms *, unsigned int *, char **,
328 int *);
Pavel Shilovskyba9ad7252012-09-18 16:20:30 -0700329 /* sync write to the server */
Steve Frenchdb8b6312014-09-22 05:13:55 -0500330 int (*sync_write)(const unsigned int, struct cifs_fid *,
Pavel Shilovskyba9ad7252012-09-18 16:20:30 -0700331 struct cifs_io_parms *, unsigned int *, struct kvec *,
332 unsigned long);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700333 /* open dir, start readdir */
334 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
335 const char *, struct cifs_sb_info *,
336 struct cifs_fid *, __u16,
337 struct cifs_search_info *);
338 /* continue readdir */
339 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
340 struct cifs_fid *,
341 __u16, struct cifs_search_info *srch_inf);
342 /* close dir */
343 int (*close_dir)(const unsigned int, struct cifs_tcon *,
344 struct cifs_fid *);
345 /* calculate a size of SMB message */
346 unsigned int (*calc_smb_size)(void *);
Pavel Shilovsky2e44b282012-09-18 16:20:33 -0700347 /* check for STATUS_PENDING and process it in a positive case */
348 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
Pavel Shilovsky95a3f2f2012-09-18 16:20:33 -0700349 /* send oplock break response */
350 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
351 struct cifsInodeInfo *);
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700352 /* query remote filesystem */
353 int (*queryfs)(const unsigned int, struct cifs_tcon *,
354 struct kstatfs *);
Pavel Shilovskyd39a4f72012-09-19 06:22:43 -0700355 /* send mandatory brlock to the server */
356 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
357 __u64, __u32, int, int, bool);
358 /* unlock range of mandatory locks */
359 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
360 const unsigned int);
361 /* push brlocks from the cache to the server */
362 int (*push_mand_locks)(struct cifsFileInfo *);
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700363 /* get lease key of the inode */
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400364 void (*get_lease_key)(struct inode *, struct cifs_fid *);
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700365 /* set lease key of the inode */
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400366 void (*set_lease_key)(struct inode *, struct cifs_fid *);
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700367 /* generate new lease key */
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400368 void (*new_lease_key)(struct cifs_fid *);
Shirish Pargaonkar32811d22013-08-29 08:35:11 -0500369 int (*generate_signingkey)(struct cifs_ses *);
Pavel Shilovsky53ef1012013-09-05 16:11:28 +0400370 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
Sachin Prabhub5be1a12013-11-25 17:09:49 +0000371 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
372 struct cifs_sb_info *, const unsigned char *,
373 char *, unsigned int *);
Sachin Prabhucbb0aba2013-11-25 17:09:52 +0000374 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
375 struct cifs_sb_info *, const unsigned char *,
376 char *, unsigned int *);
Pavel Shilovsky53ef1012013-09-05 16:11:28 +0400377 /* if we can do cache read operations */
378 bool (*is_read_op)(__u32);
379 /* set oplock level for the inode */
Pavel Shilovsky42873b02013-09-05 21:30:16 +0400380 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
381 bool *);
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400382 /* create lease context buffer for CREATE request */
383 char * (*create_lease_buf)(u8 *, u8);
Pavel Shilovsky42873b02013-09-05 21:30:16 +0400384 /* parse lease context buffer and return oplock/epoch info */
385 __u8 (*parse_lease_buf)(void *, unsigned int *);
Steve French41c13582013-11-14 00:05:36 -0600386 int (*clone_range)(const unsigned int, struct cifsFileInfo *src_file,
387 struct cifsFileInfo *target_file, u64 src_off, u64 len,
388 u64 dest_off);
Steve Frenchff1c0382013-11-19 23:44:46 -0600389 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
Steve French666753c2014-01-26 23:53:43 -0600390 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
391 const unsigned char *, const unsigned char *, char *,
392 size_t, const struct nls_table *, int);
393 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
394 const char *, const void *, const __u16,
395 const struct nls_table *, int);
Steve French83e3bc22014-02-02 23:31:47 -0600396 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
397 const char *, u32 *);
Steve French42eacf92014-02-10 14:08:16 -0600398 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
399 const struct cifs_fid *, u32 *);
Steve French83e3bc22014-02-02 23:31:47 -0600400 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
401 int);
Pavel Shilovsky7f6c5002014-06-22 11:03:22 +0400402 /* writepages retry size */
403 unsigned int (*wp_retry_size)(struct inode *);
Pavel Shilovskycb7e9ea2014-06-05 19:03:27 +0400404 /* get mtu credits */
405 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
406 unsigned int *, unsigned int *);
Pavel Shilovsky52755802014-08-18 20:49:57 +0400407 /* check if we need to issue closedir */
408 bool (*dir_needs_close)(struct cifsFileInfo *);
Steve French31742c52014-08-17 08:38:47 -0500409 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
410 loff_t);
Jeff Layton23db65f2012-05-15 12:20:51 -0400411};
412
413struct smb_version_values {
414 char *version_string;
Steve Frenche4aa25e2012-10-01 12:26:22 -0500415 __u16 protocol_id;
416 __u32 req_capabilities;
Pavel Shilovsky106dc532012-02-28 14:23:34 +0300417 __u32 large_lock_type;
418 __u32 exclusive_lock_type;
419 __u32 shared_lock_type;
420 __u32 unlock_lock_type;
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400421 size_t header_size;
422 size_t max_header_size;
Pavel Shilovskyeb378712012-05-17 13:02:51 +0400423 size_t read_rsp_size;
Pavel Shilovsky2dc7e1c2011-12-26 22:53:34 +0400424 __le16 lock_cmd;
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400425 unsigned int cap_unix;
426 unsigned int cap_nt_find;
427 unsigned int cap_large_files;
Jeff Layton50285882013-06-27 12:45:00 -0400428 __u16 signing_enabled;
429 __u16 signing_required;
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400430 size_t create_lease_size;
Jeff Layton23db65f2012-05-15 12:20:51 -0400431};
432
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400433#define HEADER_SIZE(server) (server->vals->header_size)
434#define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
435
Steve Frenchf87d39d2011-05-27 03:50:55 +0000436struct smb_vol {
437 char *username;
438 char *password;
439 char *domainname;
440 char *UNC;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000441 char *iocharset; /* local code page for mapping to and from Unicode */
442 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
443 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
Eric W. Biederman3da46562013-02-06 01:37:39 -0800444 kuid_t cred_uid;
445 kuid_t linux_uid;
446 kgid_t linux_gid;
447 kuid_t backupuid;
448 kgid_t backupgid;
Al Viro5206efd2011-07-26 03:22:14 -0400449 umode_t file_mode;
450 umode_t dir_mode;
Jeff Layton1e3cc572013-06-10 17:12:23 -0500451 enum securityEnum sectype; /* sectype requested via mnt opts */
452 bool sign; /* was signing requested via mnt opts? */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000453 bool retry:1;
454 bool intr:1;
455 bool setuids:1;
456 bool override_uid:1;
457 bool override_gid:1;
458 bool dynperm:1;
459 bool noperm:1;
460 bool no_psx_acl:1; /* set if posix acl support should be disabled */
461 bool cifs_acl:1;
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -0500462 bool backupuid_specified; /* mount option backupuid is specified */
463 bool backupgid_specified; /* mount option backupgid is specified */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000464 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
465 bool server_ino:1; /* use inode numbers from server ie UniqueId */
466 bool direct_io:1;
467 bool strict_io:1; /* strict cache behavior */
468 bool remap:1; /* set to remap seven reserved chars in filenames */
Steve French2baa2682014-09-27 02:19:01 -0500469 bool sfu_remap:1; /* remap seven reserved chars ala SFU */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000470 bool posix_paths:1; /* unset to not ask for posix pathnames. */
471 bool no_linux_ext:1;
472 bool sfu_emul:1;
473 bool nullauth:1; /* attempt to authenticate with null user */
474 bool nocase:1; /* request case insensitive filenames */
475 bool nobrl:1; /* disable sending byte range locks to srv */
476 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
477 bool seal:1; /* request transport encryption on share */
478 bool nodfs:1; /* Do not request DFS, even if available */
479 bool local_lease:1; /* check leases only on local system, not remote */
480 bool noblocksnd:1;
481 bool noautotune:1;
482 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
483 bool fsc:1; /* enable fscache */
484 bool mfsymlinks:1; /* use Minshall+French Symlinks */
485 bool multiuser:1;
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000486 bool rwpidforward:1; /* pid forward for read/write operations */
Jeff Laytona0b3df52013-05-24 07:40:59 -0400487 bool nosharesock;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000488 unsigned int rsize;
489 unsigned int wsize;
490 bool sockopt_tcp_nodelay:1;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000491 unsigned long actimeo; /* attribute cache timeout (jiffies) */
Jeff Layton23db65f2012-05-15 12:20:51 -0400492 struct smb_version_operations *ops;
493 struct smb_version_values *vals;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000494 char *prepath;
Jeff Laytonb979aaa2012-11-26 11:09:55 -0500495 struct sockaddr_storage dstaddr; /* destination address */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000496 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
497 struct nls_table *local_nls;
498};
499
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400500#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
501 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
502 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
Steve French2baa2682014-09-27 02:19:01 -0500503 CIFS_MOUNT_MAP_SFM_CHR | \
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400504 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
505 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
506 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
507 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
508 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -0500509 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
510 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400511
512#define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
513 MS_NODEV | MS_SYNCHRONOUS)
514
515struct cifs_mnt_data {
516 struct cifs_sb_info *cifs_sb;
517 struct smb_vol *vol;
518 int flags;
519};
520
Pavel Shilovsky792af7b2012-03-23 14:28:02 -0400521static inline unsigned int
522get_rfc1002_length(void *buf)
523{
Jeff Laytondca1c8d2014-02-22 19:35:38 -0500524 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
Pavel Shilovsky792af7b2012-03-23 14:28:02 -0400525}
526
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400527static inline void
528inc_rfc1001_len(void *buf, int count)
529{
530 be32_add_cpu((__be32 *)buf, count);
531}
532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533struct TCP_Server_Info {
Steve French3b795212008-11-13 19:45:32 +0000534 struct list_head tcp_ses_list;
535 struct list_head smb_ses_list;
Jeff Laytone7ddee92008-11-14 13:44:38 -0500536 int srv_count; /* reference counter */
Steve Frencha10faeb22005-08-22 21:38:31 -0700537 /* 15 character server name + 0x20 16th byte indicating type = srv */
Jeff Layton8ecaf672008-12-01 15:23:50 -0500538 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
Jeff Layton23db65f2012-05-15 12:20:51 -0400539 struct smb_version_operations *ops;
540 struct smb_version_values *vals;
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500541 enum statusEnum tcpStatus; /* what we think the status is */
Jeff Laytonc359cf32007-11-16 22:22:06 +0000542 char *hostname; /* hostname portion of UNC string */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 struct socket *ssocket;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300544 struct sockaddr_storage dstaddr;
Ben Greear3eb9a882010-09-01 17:06:02 -0700545 struct sockaddr_storage srcaddr; /* locally bind to this IP */
Rob Landleyf1d0c992011-01-22 15:44:05 -0600546#ifdef CONFIG_NET_NS
547 struct net *net;
548#endif
Steve Frenchd38d8c72007-06-28 19:44:13 +0000549 wait_queue_head_t response_q;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
551 struct list_head pending_mid_q;
Steve Frenchedf1ae42008-10-29 00:47:57 +0000552 bool noblocksnd; /* use blocking sendmsg */
553 bool noautotune; /* do not autotune send buf sizes */
Steve French6a5fa2362010-01-01 01:28:43 +0000554 bool tcp_nodelay;
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400555 int credits; /* send no more requests at once */
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300556 unsigned int in_flight; /* number of requests on the wire to server */
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400557 spinlock_t req_lock; /* protect the two values above */
Jeff Layton72ca5452008-12-01 07:09:36 -0500558 struct mutex srv_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 struct task_struct *tsk;
560 char server_GUID[16];
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400561 __u16 sec_mode;
Jeff Layton38d77c52013-05-26 07:01:00 -0400562 bool sign; /* is signing enabled on this connection? */
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500563 bool session_estab; /* mark when very first sess is established */
Pavel Shilovsky28ea5292012-05-23 16:18:00 +0400564#ifdef CONFIG_CIFS_SMB2
565 int echo_credits; /* echo reserved slots */
566 int oplock_credits; /* oplock break reserved slots */
567 bool echoes:1; /* enable echoes */
Sachin Prabhu39552ea2014-05-13 00:48:12 +0100568 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
Pavel Shilovsky28ea5292012-05-23 16:18:00 +0400569#endif
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500570 u16 dialect; /* dialect index that server chose */
Pavel Shilovsky10b9b982012-03-20 12:55:09 +0300571 bool oplocks:1; /* enable oplocks */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 unsigned int maxReq; /* Clients should submit no more */
573 /* than maxReq distinct unanswered SMBs to the server when using */
574 /* multiplexed reads or writes */
575 unsigned int maxBuf; /* maxBuf specifies the maximum */
576 /* message size the server can send or receive for non-raw SMBs */
Steve French7e90d702011-02-08 23:52:32 +0000577 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
578 /* when socket is setup (and during reconnect) before NegProt sent */
Steve Frencheca6acf2009-02-20 05:43:09 +0000579 unsigned int max_rw; /* maxRw specifies the maximum */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 /* message size the server can send or receive for */
581 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400582 unsigned int capabilities; /* selective disabling of caps by smb sess */
Steve Frenchde7ed552006-09-30 13:25:52 +0000583 int timeAdj; /* Adjust for difference in server time zone in sec */
Pavel Shilovsky243d04b2012-03-23 14:28:03 -0400584 __u64 CurrentMid; /* multiplex id - rotating counter */
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -0500585 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
Steve Frencha10faeb22005-08-22 21:38:31 -0700586 /* 16th byte of RFC1001 workstation name is always null */
Jeff Layton8ecaf672008-12-01 15:23:50 -0500587 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
Jeff Laytona0f8b4f2011-01-07 11:30:28 -0500588 __u32 sequence_number; /* for signing, protected by srv_mutex */
Shirish Pargaonkar5f98ca92010-09-18 22:01:58 -0500589 struct session_key session_key;
Steve French3a5ff612006-07-14 22:37:11 +0000590 unsigned long lstrp; /* when we got last response from this server */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500591 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
Jeff Laytone598d1d82013-05-26 07:00:59 -0400592#define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
593#define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
594#define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
595 char negflavor; /* NEGOTIATE response flavor */
Jeff Layton26efa0b2010-04-24 07:57:49 -0400596 /* extended security flavors that server supports */
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500597 bool sec_ntlmssp; /* supports NTLMSSP */
598 bool sec_kerberosu2u; /* supports U2U Kerberos */
Jeff Layton26efa0b2010-04-24 07:57:49 -0400599 bool sec_kerberos; /* supports plain Kerberos */
600 bool sec_mskerberos; /* supports legacy MS Kerberos */
Jeff Layton2a37ef92011-10-19 15:29:23 -0400601 bool large_buf; /* is current buffer large? */
Jeff Laytonc74093b2011-01-11 07:24:23 -0500602 struct delayed_work echo; /* echo ping workqueue job */
Jeff Layton1041e3f2011-10-19 15:28:27 -0400603 struct kvec *iov; /* reusable kvec array for receives */
604 unsigned int nr_iov; /* number of kvecs in array */
Jeff Layton2a37ef92011-10-19 15:29:23 -0400605 char *smallbuf; /* pointer to current "small" buffer */
606 char *bigbuf; /* pointer to current "big" buffer */
607 unsigned int total_read; /* total amount of data read in this pass */
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +0530608#ifdef CONFIG_CIFS_FSCACHE
609 struct fscache_cookie *fscache; /* client index cache cookie */
610#endif
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500611#ifdef CONFIG_CIFS_STATS2
Steve French789e6662011-08-09 18:44:44 +0000612 atomic_t in_send; /* requests trying to send */
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500613 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
614#endif
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400615#ifdef CONFIG_CIFS_SMB2
616 unsigned int max_read;
617 unsigned int max_write;
618#endif /* CONFIG_CIFS_SMB2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619};
620
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300621static inline unsigned int
622in_flight(struct TCP_Server_Info *server)
623{
624 unsigned int num;
625 spin_lock(&server->req_lock);
626 num = server->in_flight;
627 spin_unlock(&server->req_lock);
628 return num;
629}
630
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400631static inline bool
Pavel Shilovskybc205ed2012-03-15 13:22:27 +0300632has_credits(struct TCP_Server_Info *server, int *credits)
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300633{
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400634 int num;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300635 spin_lock(&server->req_lock);
Pavel Shilovskybc205ed2012-03-15 13:22:27 +0300636 num = *credits;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300637 spin_unlock(&server->req_lock);
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400638 return num > 0;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300639}
640
Pavel Shilovsky45275782012-05-17 17:53:29 +0400641static inline void
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400642add_credits(struct TCP_Server_Info *server, const unsigned int add,
643 const int optype)
Pavel Shilovsky45275782012-05-17 17:53:29 +0400644{
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400645 server->ops->add_credits(server, add, optype);
Pavel Shilovsky45275782012-05-17 17:53:29 +0400646}
647
648static inline void
Pavel Shilovskycb7e9ea2014-06-05 19:03:27 +0400649add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
650 const int optype)
651{
652 if (add) {
653 server->ops->add_credits(server, add, optype);
654 wake_up(&server->request_q);
655 }
656}
657
658static inline void
Pavel Shilovsky45275782012-05-17 17:53:29 +0400659set_credits(struct TCP_Server_Info *server, const int val)
660{
661 server->ops->set_credits(server, val);
662}
663
Sachin Prabhu9235d092014-12-09 17:37:00 +0000664static inline __le64
Tim Gardner3d378d32013-11-02 12:50:34 -0500665get_next_mid64(struct TCP_Server_Info *server)
Pavel Shilovsky88257362012-05-23 14:01:59 +0400666{
Sachin Prabhu9235d092014-12-09 17:37:00 +0000667 return cpu_to_le64(server->ops->get_next_mid(server));
Pavel Shilovsky88257362012-05-23 14:01:59 +0400668}
669
Tim Gardner3d378d32013-11-02 12:50:34 -0500670static inline __le16
671get_next_mid(struct TCP_Server_Info *server)
672{
Sachin Prabhu9235d092014-12-09 17:37:00 +0000673 __u16 mid = server->ops->get_next_mid(server);
Tim Gardner3d378d32013-11-02 12:50:34 -0500674 /*
675 * The value in the SMB header should be little endian for easy
676 * on-the-wire decoding.
677 */
678 return cpu_to_le16(mid);
679}
680
681static inline __u16
682get_mid(const struct smb_hdr *smb)
683{
684 return le16_to_cpu(smb->Mid);
685}
686
687static inline bool
688compare_mid(__u16 mid, const struct smb_hdr *smb)
689{
690 return mid == le16_to_cpu(smb->Mid);
691}
692
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693/*
Pavel Shilovsky24985c52012-09-18 16:20:28 -0700694 * When the server supports very large reads and writes via POSIX extensions,
695 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
696 * including the RFC1001 length.
697 *
698 * Note that this might make for "interesting" allocation problems during
699 * writeback however as we have to allocate an array of pointers for the
700 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
701 *
702 * For reads, there is a similar problem as we need to allocate an array
703 * of kvecs to handle the receive, though that should only need to be done
704 * once.
705 */
706#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
707#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
708
709/*
710 * When the server doesn't allow large posix writes, only allow a rsize/wsize
711 * of 2^17-1 minus the size of the call header. That allows for a read or
712 * write up to the maximum size described by RFC1002.
713 */
714#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
715#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
716
717/*
718 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
719 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
720 * a single wsize request with a single call.
721 */
722#define CIFS_DEFAULT_IOSIZE (1024 * 1024)
723
724/*
725 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
726 * those values when posix extensions aren't in force. In actuality here, we
727 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
728 * to be ok with the extra byte even though Windows doesn't send writes that
729 * are that large.
730 *
731 * Citation:
732 *
733 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
734 */
735#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
736#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
737
738/*
Rob Landleyf1d0c992011-01-22 15:44:05 -0600739 * Macros to allow the TCP_Server_Info->net field and related code to drop out
740 * when CONFIG_NET_NS isn't set.
741 */
742
743#ifdef CONFIG_NET_NS
744
745static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
746{
747 return srv->net;
748}
749
750static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
751{
752 srv->net = net;
753}
754
755#else
756
757static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
758{
759 return &init_net;
760}
761
762static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
763{
764}
765
766#endif
767
768/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 * Session structure. One of these for each uid session with a particular host
770 */
Steve French96daf2b2011-05-27 04:34:02 +0000771struct cifs_ses {
Jeff Layton14fbf502008-11-14 13:53:46 -0500772 struct list_head smb_ses_list;
Steve French3b795212008-11-13 19:45:32 +0000773 struct list_head tcon_list;
Steve Frenchd7b619c2010-02-25 05:36:46 +0000774 struct mutex session_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 struct TCP_Server_Info *server; /* pointer to server info */
Jeff Layton14fbf502008-11-14 13:53:46 -0500776 int ses_count; /* reference counter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 enum statusEnum status;
Steve French750d1152006-06-27 06:28:30 +0000778 unsigned overrideSecFlg; /* if non-zero override global sec flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 __u16 ipc_tid; /* special tid for connection to IPC share */
Steve Frenchad009ac2005-04-28 22:41:05 -0700780 char *serverOS; /* name of operating system underlying server */
781 char *serverNOS; /* name of network operating system of server */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 char *serverDomain; /* security realm of server */
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400783 __u64 Suid; /* remote smb uid */
Eric W. Biederman64ed39d2013-02-06 02:30:39 -0800784 kuid_t linux_uid; /* overriding owner of files on the mount */
785 kuid_t cred_uid; /* owner of credentials */
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400786 unsigned int capabilities;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000787 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
Steve Frenchad009ac2005-04-28 22:41:05 -0700788 TCP names - will ipv6 and sctp addresses fit? */
Steve French34c87902011-03-01 05:02:57 +0000789 char *user_name; /* must not be null except during init of sess
790 and after mount option parsing we fill it */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000791 char *domainName;
792 char *password;
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -0500793 struct session_key auth_key;
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500794 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
Jeff Layton28e11bd2013-05-26 07:01:00 -0400795 enum securityEnum sectype; /* what security flavor was specified? */
796 bool sign; /* is signing required? */
Steve French3b795212008-11-13 19:45:32 +0000797 bool need_reconnect:1; /* connection reset, uid now invalid */
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400798#ifdef CONFIG_CIFS_SMB2
799 __u16 session_flags;
Shirish Pargaonkar32811d22013-08-29 08:35:11 -0500800 char smb3signingkey[SMB3_SIGN_KEY_SIZE]; /* for signing smb3 packets */
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400801#endif /* CONFIG_CIFS_SMB2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802};
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700803
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400804static inline bool
805cap_unix(struct cifs_ses *ses)
806{
807 return ses->server->vals->cap_unix & ses->capabilities;
808}
809
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810/*
811 * there is one of these for each connection to a resource on a particular
Steve Frenchd38d8c72007-06-28 19:44:13 +0000812 * session
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 */
Steve French96daf2b2011-05-27 04:34:02 +0000814struct cifs_tcon {
Jeff Laytonf1987b42008-11-15 11:12:47 -0500815 struct list_head tcon_list;
816 int tc_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 struct list_head openFileList;
Steve French96daf2b2011-05-27 04:34:02 +0000818 struct cifs_ses *ses; /* pointer to session associated with */
Steve French254e55e2006-06-04 05:53:15 +0000819 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 char *nativeFileSystem;
Jeff Layton00e485b2008-12-05 20:41:21 -0500821 char *password; /* for share-level security */
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400822 __u32 tid; /* The 4 byte tree id */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 __u16 Flags; /* optional support bits */
824 enum statusEnum tidStatus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825#ifdef CONFIG_CIFS_STATS
826 atomic_t num_smbs_sent;
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400827 union {
828 struct {
829 atomic_t num_writes;
830 atomic_t num_reads;
831 atomic_t num_flushes;
832 atomic_t num_oplock_brks;
833 atomic_t num_opens;
834 atomic_t num_closes;
835 atomic_t num_deletes;
836 atomic_t num_mkdirs;
837 atomic_t num_posixopens;
838 atomic_t num_posixmkdirs;
839 atomic_t num_rmdirs;
840 atomic_t num_renames;
841 atomic_t num_t2renames;
842 atomic_t num_ffirst;
843 atomic_t num_fnext;
844 atomic_t num_fclose;
845 atomic_t num_hardlinks;
846 atomic_t num_symlinks;
847 atomic_t num_locks;
848 atomic_t num_acl_get;
849 atomic_t num_acl_set;
850 } cifs_stats;
Pavel Shilovskyd60622e2012-05-28 15:19:39 +0400851#ifdef CONFIG_CIFS_SMB2
852 struct {
853 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
854 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
855 } smb2_stats;
856#endif /* CONFIG_CIFS_SMB2 */
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400857 } stats;
Steve Frencha5a2b482005-08-20 21:42:53 -0700858#ifdef CONFIG_CIFS_STATS2
859 unsigned long long time_writes;
860 unsigned long long time_reads;
861 unsigned long long time_opens;
862 unsigned long long time_deletes;
863 unsigned long long time_closes;
864 unsigned long long time_mkdirs;
865 unsigned long long time_rmdirs;
866 unsigned long long time_renames;
867 unsigned long long time_t2renames;
868 unsigned long long time_ffirst;
869 unsigned long long time_fnext;
870 unsigned long long time_fclose;
871#endif /* CONFIG_CIFS_STATS2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 __u64 bytes_read;
873 __u64 bytes_written;
874 spinlock_t stat_lock;
Steve Frencha5a2b482005-08-20 21:42:53 -0700875#endif /* CONFIG_CIFS_STATS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
Steve French254e55e2006-06-04 05:53:15 +0000877 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
Steve French4b18f2a2008-04-29 00:06:05 +0000879 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
880 bool retry:1;
881 bool nocase:1;
Steve French95b1cb92008-05-15 16:44:38 +0000882 bool seal:1; /* transport encryption for this mounted share */
Steve French4b18f2a2008-04-29 00:06:05 +0000883 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
Steve Frenchc18c8422007-07-18 23:21:09 +0000884 for this mount even if server would support */
Steve French84210e92008-10-23 04:42:37 +0000885 bool local_lease:1; /* check leases (only) on local system not remote */
Steve French64cc2c62009-03-04 19:54:08 +0000886 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
Steve French3d1a3742014-08-11 21:05:25 -0500887 bool broken_sparse_sup; /* if server or share does not support sparse */
Steve French3b795212008-11-13 19:45:32 +0000888 bool need_reconnect:1; /* connection reset, tid now invalid */
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400889#ifdef CONFIG_CIFS_SMB2
890 bool print:1; /* set if connection to printer share */
891 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
Steve French769ee6a2013-06-19 14:15:30 -0500892 __le32 capabilities;
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400893 __u32 share_flags;
894 __u32 maximal_access;
895 __u32 vol_serial_number;
896 __le64 vol_create_time;
Steven Frenchaf6a12e2013-10-09 20:55:53 -0500897 __u32 ss_flags; /* sector size flags */
898 __u32 perf_sector_size; /* best sector size for perf */
Steve Frenchde9f68d2013-11-15 11:26:24 -0600899 __u32 max_chunks;
900 __u32 max_bytes_chunk;
901 __u32 max_bytes_copy;
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400902#endif /* CONFIG_CIFS_SMB2 */
Suresh Jayaramand03382c2010-07-05 18:12:27 +0530903#ifdef CONFIG_CIFS_FSCACHE
904 u64 resource_id; /* server resource id */
905 struct fscache_cookie *fscache; /* cookie for share */
906#endif
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700907 struct list_head pending_opens; /* list of incomplete opens */
Steve Frenchc18c8422007-07-18 23:21:09 +0000908 /* BB add field for back pointer to sb struct(s)? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909};
910
911/*
Jeff Layton7ffec372010-09-29 19:51:11 -0400912 * This is a refcounted and timestamped container for a tcon pointer. The
913 * container holds a tcon reference. It is considered safe to free one of
914 * these when the tl_count goes to 0. The tl_time is the time of the last
915 * "get" on the container.
916 */
917struct tcon_link {
Jeff Laytonb647c352010-10-28 11:16:44 -0400918 struct rb_node tl_rbnode;
Eric W. Biederman6d4a0832013-02-06 01:48:56 -0800919 kuid_t tl_uid;
Jeff Layton9d002df2010-10-06 19:51:11 -0400920 unsigned long tl_flags;
921#define TCON_LINK_MASTER 0
922#define TCON_LINK_PENDING 1
923#define TCON_LINK_IN_TREE 2
924 unsigned long tl_time;
925 atomic_t tl_count;
Steve French96daf2b2011-05-27 04:34:02 +0000926 struct cifs_tcon *tl_tcon;
Jeff Layton7ffec372010-09-29 19:51:11 -0400927};
928
Jeff Layton9d002df2010-10-06 19:51:11 -0400929extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
Jeff Layton7ffec372010-09-29 19:51:11 -0400930
Steve French96daf2b2011-05-27 04:34:02 +0000931static inline struct cifs_tcon *
Jeff Layton7ffec372010-09-29 19:51:11 -0400932tlink_tcon(struct tcon_link *tlink)
933{
Jeff Layton9d002df2010-10-06 19:51:11 -0400934 return tlink->tl_tcon;
Jeff Layton7ffec372010-09-29 19:51:11 -0400935}
936
Jeff Layton9d002df2010-10-06 19:51:11 -0400937extern void cifs_put_tlink(struct tcon_link *tlink);
Jeff Layton7ffec372010-09-29 19:51:11 -0400938
Jeff Layton13cfb732010-09-29 19:51:11 -0400939static inline struct tcon_link *
940cifs_get_tlink(struct tcon_link *tlink)
941{
Jeff Layton9d002df2010-10-06 19:51:11 -0400942 if (tlink && !IS_ERR(tlink))
943 atomic_inc(&tlink->tl_count);
Jeff Layton13cfb732010-09-29 19:51:11 -0400944 return tlink;
945}
946
Jeff Layton7ffec372010-09-29 19:51:11 -0400947/* This function is always expected to succeed */
Steve French96daf2b2011-05-27 04:34:02 +0000948extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
Jeff Layton7ffec372010-09-29 19:51:11 -0400949
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700950#define CIFS_OPLOCK_NO_CHANGE 0xfe
951
952struct cifs_pending_open {
953 struct list_head olist;
954 struct tcon_link *tlink;
955 __u8 lease_key[16];
956 __u32 oplock;
957};
958
Jeff Layton7ffec372010-09-29 19:51:11 -0400959/*
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000960 * This info hangs off the cifsFileInfo structure, pointed to by llist.
961 * This is used to track byte stream locks on the file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 */
963struct cifsLockInfo {
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000964 struct list_head llist; /* pointer to next cifsLockInfo */
Pavel Shilovsky85160e02011-10-22 15:33:29 +0400965 struct list_head blist; /* pointer to locks blocked on this */
966 wait_queue_head_t block_q;
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000967 __u64 offset;
968 __u64 length;
Pavel Shilovsky03776f42010-08-17 11:26:00 +0400969 __u32 pid;
Pavel Shilovsky04a6aa82012-02-28 14:16:55 +0300970 __u32 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971};
972
973/*
974 * One of these for each open instance of a file
975 */
976struct cifs_search_info {
977 loff_t index_of_last_entry;
978 __u16 entries_in_buffer;
979 __u16 info_level;
980 __u32 resume_key;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000981 char *ntwrk_buf_start;
982 char *srch_entries_start;
Steve French0752f152008-10-07 20:03:33 +0000983 char *last_entry;
Christoph Hellwigeaf35b12011-07-16 15:24:37 -0400984 const char *presume_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 unsigned int resume_name_len;
Steve French4b18f2a2008-04-29 00:06:05 +0000986 bool endOfSearch:1;
987 bool emptyDir:1;
988 bool unicode:1;
989 bool smallBuf:1; /* so we know which buf_release function to call */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990};
991
Pavel Shilovsky226730b2013-07-05 12:00:30 +0400992struct cifs_open_parms {
993 struct cifs_tcon *tcon;
994 struct cifs_sb_info *cifs_sb;
995 int disposition;
996 int desired_access;
997 int create_options;
998 const char *path;
999 struct cifs_fid *fid;
Pavel Shilovsky9cbc0b72013-07-09 18:40:58 +04001000 bool reconnect:1;
Pavel Shilovsky226730b2013-07-05 12:00:30 +04001001};
1002
Pavel Shilovsky4b4de762012-09-18 16:20:26 -07001003struct cifs_fid {
1004 __u16 netfid;
Pavel Shilovskyf0df7372012-09-18 16:20:26 -07001005#ifdef CONFIG_CIFS_SMB2
1006 __u64 persistent_fid; /* persist file id for smb2 */
1007 __u64 volatile_fid; /* volatile file id for smb2 */
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001008 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
Pavel Shilovskyf0df7372012-09-18 16:20:26 -07001009#endif
Pavel Shilovsky233839b2012-09-19 06:22:45 -07001010 struct cifs_pending_open *pending_open;
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001011 unsigned int epoch;
1012 bool purge_cache;
Pavel Shilovsky4b4de762012-09-18 16:20:26 -07001013};
1014
Pavel Shilovskyf45d3412012-09-19 06:22:43 -07001015struct cifs_fid_locks {
1016 struct list_head llist;
1017 struct cifsFileInfo *cfile; /* fid that owns locks */
1018 struct list_head locks; /* locks held by fid above */
1019};
1020
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021struct cifsFileInfo {
1022 struct list_head tlist; /* pointer to next fid owned by tcon */
1023 struct list_head flist; /* next fid (file instance) for this inode */
Pavel Shilovskyf45d3412012-09-19 06:22:43 -07001024 struct cifs_fid_locks *llist; /* brlocks held by this fid */
Eric W. Biedermanfef59fd2013-02-06 02:23:02 -08001025 kuid_t uid; /* allows finding which FileInfo structure */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 __u32 pid; /* process id who opened file */
Pavel Shilovsky4b4de762012-09-18 16:20:26 -07001027 struct cifs_fid fid; /* file id from remote */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 /* BB add lock scope info here if needed */ ;
1029 /* lock scope id (0 if none) */
Jeff Laytona5e18bc2010-10-11 15:07:18 -04001030 struct dentry *dentry;
Jeff Layton15886172010-10-15 15:33:59 -04001031 unsigned int f_flags;
Jeff Layton13cfb732010-09-29 19:51:11 -04001032 struct tcon_link *tlink;
Steve French4b18f2a2008-04-29 00:06:05 +00001033 bool invalidHandle:1; /* file closed via session abend */
Jeff Layton3bc303c2009-09-21 06:47:50 -04001034 bool oplock_break_cancelled:1;
Steve French6c0f6212010-10-23 16:51:40 +00001035 int count; /* refcount protected by cifs_file_list_lock */
Steve Frencha6ce4932009-04-09 01:14:32 +00001036 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 struct cifs_search_info srch_inf;
Tejun Heo9b646972010-07-20 22:09:02 +02001038 struct work_struct oplock_break; /* work for oplock breaks */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039};
1040
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +04001041struct cifs_io_parms {
1042 __u16 netfid;
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001043#ifdef CONFIG_CIFS_SMB2
1044 __u64 persistent_fid; /* persist file id for smb2 */
1045 __u64 volatile_fid; /* volatile file id for smb2 */
1046#endif
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +04001047 __u32 pid;
1048 __u64 offset;
1049 unsigned int length;
Steve French96daf2b2011-05-27 04:34:02 +00001050 struct cifs_tcon *tcon;
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +04001051};
1052
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001053struct cifs_readdata;
1054
1055/* asynchronous read support */
1056struct cifs_readdata {
1057 struct kref refcount;
1058 struct list_head list;
1059 struct completion done;
1060 struct cifsFileInfo *cfile;
1061 struct address_space *mapping;
1062 __u64 offset;
1063 unsigned int bytes;
Pavel Shilovsky34a54d62014-07-10 10:03:29 +04001064 unsigned int got_bytes;
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001065 pid_t pid;
1066 int result;
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001067 struct work_struct work;
Jeff Layton8321fec2012-09-19 06:22:32 -07001068 int (*read_into_pages)(struct TCP_Server_Info *server,
1069 struct cifs_readdata *rdata,
1070 unsigned int len);
Jeff Layton58195752012-09-19 06:22:34 -07001071 struct kvec iov;
Jeff Layton8321fec2012-09-19 06:22:32 -07001072 unsigned int pagesz;
1073 unsigned int tailsz;
Pavel Shilovskybed9da02014-06-25 11:28:57 +04001074 unsigned int credits;
Jeff Laytonc5fab6f2012-09-19 06:22:30 -07001075 unsigned int nr_pages;
1076 struct page *pages[];
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001077};
1078
Pavel Shilovsky33319142012-09-18 16:20:29 -07001079struct cifs_writedata;
1080
1081/* asynchronous write support */
1082struct cifs_writedata {
1083 struct kref refcount;
1084 struct list_head list;
1085 struct completion done;
1086 enum writeback_sync_modes sync_mode;
1087 struct work_struct work;
1088 struct cifsFileInfo *cfile;
1089 __u64 offset;
1090 pid_t pid;
1091 unsigned int bytes;
1092 int result;
Jeff Laytoneddb0792012-09-18 16:20:35 -07001093 unsigned int pagesz;
1094 unsigned int tailsz;
Pavel Shilovskycb7e9ea2014-06-05 19:03:27 +04001095 unsigned int credits;
Pavel Shilovsky33319142012-09-18 16:20:29 -07001096 unsigned int nr_pages;
Jeff Layton26c8f0d2014-02-07 11:04:04 -05001097 struct page *pages[];
Pavel Shilovsky33319142012-09-18 16:20:29 -07001098};
1099
Jeff Layton5f6dbc92010-10-15 15:34:06 -04001100/*
1101 * Take a reference on the file private data. Must be called with
1102 * cifs_file_list_lock held.
1103 */
Jeff Layton764a1b12012-07-25 14:59:54 -04001104static inline void
1105cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
Dave Kleikamp6ab409b2009-08-31 11:07:12 -04001106{
Jeff Layton5f6dbc92010-10-15 15:34:06 -04001107 ++cifs_file->count;
Dave Kleikamp6ab409b2009-08-31 11:07:12 -04001108}
1109
Jeff Layton764a1b12012-07-25 14:59:54 -04001110struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
Jeff Laytonb33879a2010-10-15 15:34:04 -04001111void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
Dave Kleikamp6ab409b2009-08-31 11:07:12 -04001112
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001113#define CIFS_CACHE_READ_FLG 1
1114#define CIFS_CACHE_HANDLE_FLG 2
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001115#define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001116#define CIFS_CACHE_WRITE_FLG 4
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001117#define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1118#define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001119
1120#define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
Pavel Shilovsky53ef1012013-09-05 16:11:28 +04001121#define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001122#define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1123
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124/*
1125 * One of these for each file inode
1126 */
1127
1128struct cifsInodeInfo {
Pavel Shilovskyd59dad22011-09-22 09:53:59 +04001129 bool can_cache_brlcks;
Pavel Shilovskyf45d3412012-09-19 06:22:43 -07001130 struct list_head llist; /* locks helb by this inode */
Pavel Shilovsky1b4b55a2012-09-19 06:22:44 -07001131 struct rw_semaphore lock_sem; /* protect the fields above */
Steve Frenchd38d8c72007-06-28 19:44:13 +00001132 /* BB add in lists for dirty pages i.e. write caching info for oplock */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 struct list_head openFileList;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001135 unsigned int oplock; /* oplock/lease level we have */
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001136 unsigned int epoch; /* used to track lease state changes */
Sachin Prabhuc11f1df2014-03-11 16:11:47 +00001137#define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1138#define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1139#define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
Jeff Laytonaff8d5c2014-04-30 09:31:45 -04001140#define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1141#define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
Jeff Layton4f73c7d2014-04-30 09:31:47 -04001142#define CIFS_INO_LOCK (5) /* lock bit for synchronization */
Jeff Laytonaff8d5c2014-04-30 09:31:45 -04001143 unsigned long flags;
Sachin Prabhuc11f1df2014-03-11 16:11:47 +00001144 spinlock_t writers_lock;
1145 unsigned int writers; /* Number of writers on this inode */
Jeff Laytonaae62fd2011-01-20 13:36:50 -05001146 unsigned long time; /* jiffies of last update of inode */
Jeff Layton597b0272012-03-23 14:40:56 -04001147 u64 server_eof; /* current file size on server -- protected by i_lock */
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001148 u64 uniqueid; /* server inode number */
Jeff Layton20054bd2011-01-07 11:30:27 -05001149 u64 createtime; /* creation time on server */
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001150#ifdef CONFIG_CIFS_SMB2
1151 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1152#endif
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +05301153#ifdef CONFIG_CIFS_FSCACHE
1154 struct fscache_cookie *fscache;
1155#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 struct inode vfs_inode;
1157};
1158
1159static inline struct cifsInodeInfo *
1160CIFS_I(struct inode *inode)
1161{
1162 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1163}
1164
1165static inline struct cifs_sb_info *
1166CIFS_SB(struct super_block *sb)
1167{
1168 return sb->s_fs_info;
1169}
1170
Al Viro7119e222014-10-22 00:25:12 -04001171static inline struct cifs_sb_info *
1172CIFS_FILE_SB(struct file *file)
1173{
1174 return CIFS_SB(file_inode(file)->i_sb);
1175}
1176
Steve Frenchab2f2182005-09-15 20:44:50 -07001177static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
Jeremy Allisonac670552005-06-22 17:26:35 -07001178{
1179 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1180 return '/';
1181 else
1182 return '\\';
1183}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184
Steve Frenchf87d39d2011-05-27 03:50:55 +00001185static inline void
1186convert_delimiter(char *path, char delim)
1187{
Steve French1cc9bd62012-11-29 18:07:51 -06001188 char old_delim, *pos;
Steve Frenchf87d39d2011-05-27 03:50:55 +00001189
1190 if (delim == '/')
1191 old_delim = '\\';
1192 else
1193 old_delim = '/';
1194
Steve French1cc9bd62012-11-29 18:07:51 -06001195 pos = path;
1196 while ((pos = strchr(pos, old_delim)))
1197 *pos = delim;
Steve Frenchf87d39d2011-05-27 03:50:55 +00001198}
1199
Steve Frencha4544342005-08-24 13:59:35 -07001200#ifdef CONFIG_CIFS_STATS
1201#define cifs_stats_inc atomic_inc
1202
Steve French96daf2b2011-05-27 04:34:02 +00001203static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
Steve Frencha4544342005-08-24 13:59:35 -07001204 unsigned int bytes)
1205{
1206 if (bytes) {
1207 spin_lock(&tcon->stat_lock);
1208 tcon->bytes_written += bytes;
1209 spin_unlock(&tcon->stat_lock);
1210 }
1211}
1212
Steve French96daf2b2011-05-27 04:34:02 +00001213static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
Steve Frencha4544342005-08-24 13:59:35 -07001214 unsigned int bytes)
1215{
1216 spin_lock(&tcon->stat_lock);
1217 tcon->bytes_read += bytes;
1218 spin_unlock(&tcon->stat_lock);
1219}
1220#else
1221
Steve Frenchd38d8c72007-06-28 19:44:13 +00001222#define cifs_stats_inc(field) do {} while (0)
1223#define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1224#define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
Steve Frencha4544342005-08-24 13:59:35 -07001225
1226#endif
1227
Jeff Layton2b84a36c2011-01-11 07:24:21 -05001228
1229/*
Jeff Layton44d22d82011-10-19 15:29:49 -04001230 * This is the prototype for the mid receive function. This function is for
1231 * receiving the rest of the SMB frame, starting with the WordCount (which is
1232 * just after the MID in struct smb_hdr). Note:
1233 *
1234 * - This will be called by cifsd, with no locks held.
1235 * - The mid will still be on the pending_mid_q.
1236 * - mid->resp_buf will point to the current buffer.
1237 *
1238 * Returns zero on a successful receive, or an error. The receive state in
1239 * the TCP_Server_Info will also be updated.
1240 */
1241typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1242 struct mid_q_entry *mid);
1243
1244/*
1245 * This is the prototype for the mid callback function. This is called once the
1246 * mid has been received off of the socket. When creating one, take special
1247 * care to avoid deadlocks. Things to bear in mind:
Jeff Layton2b84a36c2011-01-11 07:24:21 -05001248 *
Jeff Layton3c1105d2011-05-22 07:09:13 -04001249 * - it will be called by cifsd, with no locks held
1250 * - the mid will be removed from any lists
Jeff Layton2b84a36c2011-01-11 07:24:21 -05001251 */
1252typedef void (mid_callback_t)(struct mid_q_entry *mid);
1253
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254/* one of these for every pending CIFS request to the server */
1255struct mid_q_entry {
1256 struct list_head qhead; /* mids waiting on reply from this server */
Pavel Shilovsky2dc7e1c2011-12-26 22:53:34 +04001257 struct TCP_Server_Info *server; /* server corresponding to this mid */
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -04001258 __u64 mid; /* multiplex id */
1259 __u32 pid; /* process id */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 __u32 sequence_number; /* for CIFS signing */
Steve French1047abc2005-10-11 19:58:06 -07001261 unsigned long when_alloc; /* when mid was created */
1262#ifdef CONFIG_CIFS_STATS2
1263 unsigned long when_sent; /* time when smb send finished */
1264 unsigned long when_received; /* when demux complete (taken off wire) */
1265#endif
Jeff Layton44d22d82011-10-19 15:29:49 -04001266 mid_receive_t *receive; /* call receive callback */
Jeff Layton2b84a36c2011-01-11 07:24:21 -05001267 mid_callback_t *callback; /* call completion callback */
1268 void *callback_data; /* general purpose pointer for callback */
Pavel Shilovskyd4e48542012-03-23 14:28:02 -04001269 void *resp_buf; /* pointer to received SMB header */
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -04001270 int mid_state; /* wish this were enum but can not pass to wait_event */
1271 __le16 command; /* smb command code */
1272 bool large_buf:1; /* if valid response, is pointer to large buf */
Steve French4b18f2a2008-04-29 00:06:05 +00001273 bool multiRsp:1; /* multiple trans2 responses for one request */
1274 bool multiEnd:1; /* both received */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275};
1276
Steve French789e6662011-08-09 18:44:44 +00001277/* Make code in transport.c a little cleaner by moving
1278 update of optional stats into function below */
1279#ifdef CONFIG_CIFS_STATS2
1280
1281static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1282{
1283 atomic_inc(&server->in_send);
1284}
1285
1286static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1287{
1288 atomic_dec(&server->in_send);
1289}
1290
1291static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1292{
1293 atomic_inc(&server->num_waiters);
1294}
1295
1296static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1297{
1298 atomic_dec(&server->num_waiters);
1299}
1300
1301static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1302{
1303 mid->when_sent = jiffies;
1304}
1305#else
1306static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1307{
1308}
1309static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1310{
1311}
1312
1313static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1314{
1315}
1316
1317static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1318{
1319}
1320
1321static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1322{
1323}
1324#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325
Steve Frenchff5dbd92005-08-24 17:10:36 -07001326/* for pending dnotify requests */
1327struct dir_notify_req {
Steve French13cd4b72010-10-07 18:46:32 +00001328 struct list_head lhead;
1329 __le16 Pid;
1330 __le16 PidHigh;
1331 __u16 Mid;
1332 __u16 Tid;
1333 __u16 Uid;
1334 __u16 netfid;
1335 __u32 filter; /* CompletionFilter (for multishot) */
1336 int multishot;
1337 struct file *pfile;
Steve Frenchff5dbd92005-08-24 17:10:36 -07001338};
1339
Steve French366781c2008-01-25 10:12:41 +00001340struct dfs_info3_param {
1341 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
Igor Mammedov8aad0182008-02-15 18:21:49 +00001342 int path_consumed;
Steve French366781c2008-01-25 10:12:41 +00001343 int server_type;
1344 int ref_flag;
1345 char *path_name;
1346 char *node_name;
1347};
1348
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001349/*
1350 * common struct for holding inode info when searching for or updating an
1351 * inode with new info
1352 */
1353
1354#define CIFS_FATTR_DFS_REFERRAL 0x1
Jeff Layton0b8f18e2009-07-09 01:46:37 -04001355#define CIFS_FATTR_DELETE_PENDING 0x2
1356#define CIFS_FATTR_NEED_REVAL 0x4
Jeff Layton3d694382010-05-11 14:59:55 -04001357#define CIFS_FATTR_INO_COLLISION 0x8
Jim McDonough74d290d2013-09-21 10:36:10 -05001358#define CIFS_FATTR_UNKNOWN_NLINK 0x10
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001359
1360struct cifs_fattr {
1361 u32 cf_flags;
1362 u32 cf_cifsattrs;
1363 u64 cf_uniqueid;
1364 u64 cf_eof;
1365 u64 cf_bytes;
Jeff Layton20054bd2011-01-07 11:30:27 -05001366 u64 cf_createtime;
Eric W. Biederman4a2c8cf2013-02-06 01:53:25 -08001367 kuid_t cf_uid;
1368 kgid_t cf_gid;
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001369 umode_t cf_mode;
1370 dev_t cf_rdev;
1371 unsigned int cf_nlink;
1372 unsigned int cf_dtype;
1373 struct timespec cf_atime;
1374 struct timespec cf_mtime;
1375 struct timespec cf_ctime;
1376};
1377
Steve French366781c2008-01-25 10:12:41 +00001378static inline void free_dfs_info_param(struct dfs_info3_param *param)
1379{
1380 if (param) {
1381 kfree(param->path_name);
1382 kfree(param->node_name);
1383 kfree(param);
1384 }
1385}
1386
1387static inline void free_dfs_info_array(struct dfs_info3_param *param,
1388 int number_of_items)
1389{
1390 int i;
1391 if ((number_of_items == 0) || (param == NULL))
1392 return;
1393 for (i = 0; i < number_of_items; i++) {
1394 kfree(param[i].path_name);
1395 kfree(param[i].node_name);
1396 }
1397 kfree(param);
1398}
1399
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400#define MID_FREE 0
1401#define MID_REQUEST_ALLOCATED 1
1402#define MID_REQUEST_SUBMITTED 2
1403#define MID_RESPONSE_RECEIVED 4
1404#define MID_RETRY_NEEDED 8 /* session closed while this request out */
Jeff Layton71823ba2011-02-10 08:03:50 -05001405#define MID_RESPONSE_MALFORMED 0x10
Jeff Layton3c1105d2011-05-22 07:09:13 -04001406#define MID_SHUTDOWN 0x20
Steve Frenchec637e32005-12-12 20:53:18 -08001407
1408/* Types of response buffer returned from SendReceive2 */
1409#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1410#define CIFS_SMALL_BUFFER 1
1411#define CIFS_LARGE_BUFFER 2
1412#define CIFS_IOVEC 4 /* array of response buffers */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413
Steve French133672e2007-11-13 22:41:37 +00001414/* Type of Request to SendReceive2 */
Jeff Layton77499812011-01-11 07:24:23 -05001415#define CIFS_BLOCKING_OP 1 /* operation can block */
1416#define CIFS_ASYNC_OP 2 /* do not wait for response */
1417#define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
Steve French133672e2007-11-13 22:41:37 +00001418#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1419#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1420#define CIFS_NO_RESP 0x040 /* no response buffer required */
1421
Pavel Shilovskya891f0f2012-05-23 16:14:34 +04001422/* Type of request operation */
1423#define CIFS_ECHO_OP 0x080 /* echo request */
1424#define CIFS_OBREAK_OP 0x0100 /* oplock break request */
Pavel Shilovskyec2e4522011-12-27 16:12:43 +04001425#define CIFS_NEG_OP 0x0200 /* negotiate request */
1426#define CIFS_OP_MASK 0x0380 /* mask request type */
Pavel Shilovskycb7e9ea2014-06-05 19:03:27 +04001427#define CIFS_HAS_CREDITS 0x0400 /* already has credits */
Pavel Shilovskya891f0f2012-05-23 16:14:34 +04001428
Steve French39798772006-05-31 22:40:51 +00001429/* Security Flags: indicate type of session setup needed */
1430#define CIFSSEC_MAY_SIGN 0x00001
1431#define CIFSSEC_MAY_NTLM 0x00002
1432#define CIFSSEC_MAY_NTLMV2 0x00004
1433#define CIFSSEC_MAY_KRB5 0x00008
1434#ifdef CONFIG_CIFS_WEAK_PW_HASH
1435#define CIFSSEC_MAY_LANMAN 0x00010
1436#define CIFSSEC_MAY_PLNTXT 0x00020
Steve French516897a2007-10-12 19:24:06 +00001437#else
1438#define CIFSSEC_MAY_LANMAN 0
1439#define CIFSSEC_MAY_PLNTXT 0
Steve French39798772006-05-31 22:40:51 +00001440#endif /* weak passwords */
1441#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
Steve Frenchac683922009-05-06 04:16:04 +00001442#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
Steve French5815449d2006-02-14 01:36:20 +00001443
Steve French39798772006-05-31 22:40:51 +00001444#define CIFSSEC_MUST_SIGN 0x01001
1445/* note that only one of the following can be set so the
1446result of setting MUST flags more than once will be to
1447require use of the stronger protocol */
1448#define CIFSSEC_MUST_NTLM 0x02002
1449#define CIFSSEC_MUST_NTLMV2 0x04004
1450#define CIFSSEC_MUST_KRB5 0x08008
1451#ifdef CONFIG_CIFS_WEAK_PW_HASH
1452#define CIFSSEC_MUST_LANMAN 0x10010
1453#define CIFSSEC_MUST_PLNTXT 0x20020
Jeff Layton0d3a01f2007-10-16 17:32:19 +00001454#ifdef CONFIG_CIFS_UPCALL
Chuck Ebbert20d17522009-09-15 01:53:21 -04001455#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
Steve Frenchd38d8c72007-06-28 19:44:13 +00001456#else
Chuck Ebbert20d17522009-09-15 01:53:21 -04001457#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
Steve French016ec752007-10-16 18:10:10 +00001458#endif /* UPCALL */
Jeff Layton0d3a01f2007-10-16 17:32:19 +00001459#else /* do not allow weak pw hash */
Steve French88a44122012-01-18 17:13:47 -06001460#define CIFSSEC_MUST_LANMAN 0
1461#define CIFSSEC_MUST_PLNTXT 0
Jeff Layton0d3a01f2007-10-16 17:32:19 +00001462#ifdef CONFIG_CIFS_UPCALL
Steve Frenchac683922009-05-06 04:16:04 +00001463#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
Jeff Layton0d3a01f2007-10-16 17:32:19 +00001464#else
Steve Frenchac683922009-05-06 04:16:04 +00001465#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
Steve French016ec752007-10-16 18:10:10 +00001466#endif /* UPCALL */
Steve French39798772006-05-31 22:40:51 +00001467#endif /* WEAK_PW_HASH */
1468#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
Steve Frenchac683922009-05-06 04:16:04 +00001469#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
Steve French39798772006-05-31 22:40:51 +00001470
Jeff Layton896a8fc2013-05-26 07:01:01 -04001471#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
Shirish Pargaonkaref571ca2008-07-24 15:56:05 +00001472#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
Steve Frenchac683922009-05-06 04:16:04 +00001473#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 -07001474/*
1475 *****************************************************************
1476 * All constants go here
1477 *****************************************************************
1478 */
1479
1480#define UID_HASH (16)
1481
1482/*
1483 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1484 * following to be declared.
1485 */
1486
1487/****************************************************************************
1488 * Locking notes. All updates to global variables and lists should be
1489 * protected by spinlocks or semaphores.
1490 *
1491 * Spinlocks
1492 * ---------
1493 * GlobalMid_Lock protects:
1494 * list operations on pending_mid_q and oplockQ
1495 * updates to XID counters, multiplex id and SMB sequence numbers
Suresh Jayaraman6573e9b2010-10-18 23:52:18 +05301496 * cifs_file_list_lock protects:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497 * list operations on tcp and SMB session lists and tCon lists
1498 * f_owner.lock protects certain per file struct operations
1499 * mapping->page_lock protects certain per page operations
1500 *
1501 * Semaphores
1502 * ----------
1503 * sesSem operations on smb session
1504 * tconSem operations on tree connection
Steve Frenchd38d8c72007-06-28 19:44:13 +00001505 * fh_sem file handle reconnection operations
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506 *
1507 ****************************************************************************/
1508
1509#ifdef DECLARE_GLOBALS_HERE
1510#define GLOBAL_EXTERN
1511#else
1512#define GLOBAL_EXTERN extern
1513#endif
1514
Jeff Laytone7ddee92008-11-14 13:44:38 -05001515/*
1516 * the list of TCP_Server_Info structures, ie each of the sockets
Steve Frenchfb396012008-11-13 20:04:07 +00001517 * connecting our client to a distinct server (ip address), is
Jeff Laytone7ddee92008-11-14 13:44:38 -05001518 * chained together by cifs_tcp_ses_list. The list of all our SMB
Steve Frenchfb396012008-11-13 20:04:07 +00001519 * sessions (and from that the tree connections) can be found
Jeff Laytone7ddee92008-11-14 13:44:38 -05001520 * by iterating over cifs_tcp_ses_list
1521 */
1522GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1523
Jeff Laytonf1987b42008-11-15 11:12:47 -05001524/*
1525 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1526 * tcp session, and the list of tcon's per smb session. It also protects
1527 * the reference counters for the server, smb session, and tcon. Finally,
1528 * changes to the tcon->tidStatus should be done while holding this lock.
1529 */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301530GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
Steve Frenchddb4cbf2008-11-20 20:00:44 +00001531
1532/*
1533 * This lock protects the cifs_file->llist and cifs_file->flist
1534 * list operations, and updates to some flags (cifs_file->invalidHandle)
1535 * It will be moved to either use the tcon->stat_lock or equivalent later.
1536 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1537 * the cifs_tcp_ses_lock must be grabbed first and released last.
1538 */
Jeff Layton44772882010-10-15 15:34:03 -04001539GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540
Steve French0eff0e22011-02-24 05:39:23 +00001541#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
Steve French99ee4db2007-02-27 05:35:17 +00001542/* Outstanding dir notify requests */
1543GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1544/* DirNotify response queue */
1545GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
Steve French0eff0e22011-02-24 05:39:23 +00001546#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
Steve Frenchff5dbd92005-08-24 17:10:36 -07001547
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548/*
1549 * Global transaction id (XID) information
1550 */
1551GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +00001552GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +00001554GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1555 /* on midQ entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556/*
1557 * Global counters, updated atomically
1558 */
1559GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1560GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1561GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1562GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1563GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1564
Steve Frenchaaa9bbe2008-05-23 17:38:32 +00001565/* Various Debug counters */
Steve French4498eed52005-12-03 13:58:57 -08001566GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1567#ifdef CONFIG_CIFS_STATS2
1568GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1569GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1570#endif
1571GLOBAL_EXTERN atomic_t smBufAllocCount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572GLOBAL_EXTERN atomic_t midCount;
1573
1574/* Misc globals */
Jeff Layton5e500ed2012-05-16 07:13:17 -04001575GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576GLOBAL_EXTERN unsigned int lookupCacheEnabled;
Jeff Layton04912d62010-04-24 07:57:45 -04001577GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578 with more secure ntlmssp2 challenge/resp */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1581GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1582GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1583GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1584GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1585
Shirish Pargaonkar21fed0d2011-08-09 14:30:48 -05001586#ifdef CONFIG_CIFS_ACL
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001587GLOBAL_EXTERN struct rb_root uidtree;
1588GLOBAL_EXTERN struct rb_root gidtree;
1589GLOBAL_EXTERN spinlock_t siduidlock;
1590GLOBAL_EXTERN spinlock_t sidgidlock;
Shirish Pargaonkar21fed0d2011-08-09 14:30:48 -05001591GLOBAL_EXTERN struct rb_root siduidtree;
1592GLOBAL_EXTERN struct rb_root sidgidtree;
1593GLOBAL_EXTERN spinlock_t uidsidlock;
1594GLOBAL_EXTERN spinlock_t gidsidlock;
1595#endif /* CONFIG_CIFS_ACL */
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001596
Tejun Heo9b646972010-07-20 22:09:02 +02001597void cifs_oplock_break(struct work_struct *work);
Linus Torvalds3b7433b2010-08-07 12:42:58 -07001598
Jeff Layton3bc303c2009-09-21 06:47:50 -04001599extern const struct slow_work_ops cifs_oplock_break_ops;
Jeff Laytonda472fc2012-03-23 14:40:53 -04001600extern struct workqueue_struct *cifsiod_wq;
Suresh Jayaramanabd2e442010-06-22 20:52:50 +05301601
Pavel Shilovsky2dc7e1c2011-12-26 22:53:34 +04001602extern mempool_t *cifs_mid_poolp;
1603
Jeff Layton23db65f2012-05-15 12:20:51 -04001604/* Operations for different SMB versions */
1605#define SMB1_VERSION_STRING "1.0"
1606extern struct smb_version_operations smb1_operations;
1607extern struct smb_version_values smb1_values;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001608#define SMB20_VERSION_STRING "2.0"
Pavel Shilovsky53ef1012013-09-05 16:11:28 +04001609extern struct smb_version_operations smb20_operations;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001610extern struct smb_version_values smb20_values;
Steve French1080ef72011-02-24 18:07:19 +00001611#define SMB21_VERSION_STRING "2.1"
1612extern struct smb_version_operations smb21_operations;
1613extern struct smb_version_values smb21_values;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001614#define SMB30_VERSION_STRING "3.0"
Steve French38107d42012-12-08 22:08:06 -06001615extern struct smb_version_operations smb30_operations;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001616extern struct smb_version_values smb30_values;
Steve French20b6d8b2013-06-12 22:48:41 -05001617#define SMB302_VERSION_STRING "3.02"
1618/*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1619extern struct smb_version_values smb302_values;
Suresh Jayaramanabd2e442010-06-22 20:52:50 +05301620#endif /* _CIFS_GLOB_H */