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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
Steve Frenchadfeb3e2015-12-18 12:31:36 -060073/* echo interval in seconds */
74#define SMB_ECHO_INTERVAL_MIN 1
75#define SMB_ECHO_INTERVAL_MAX 600
76#define SMB_ECHO_INTERVAL_DEFAULT 60
Pavel Shilovsky9094fad2012-07-12 18:30:44 +040077
Linus Torvalds1da177e2005-04-16 15:20:36 -070078#include "cifspdu.h"
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080#ifndef XATTR_DOS_ATTRIB
81#define XATTR_DOS_ATTRIB "user.DOSATTRIB"
82#endif
83
84/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 * CIFS vfs client Status information (based on what we know.)
86 */
87
Steve French6c0f6212010-10-23 16:51:40 +000088/* associated with each tcp and smb session */
Linus Torvalds1da177e2005-04-16 15:20:36 -070089enum statusEnum {
90 CifsNew = 0,
91 CifsGood,
92 CifsExiting,
Steve Frenchfd88ce92011-04-12 01:01:14 +000093 CifsNeedReconnect,
94 CifsNeedNegotiate
Linus Torvalds1da177e2005-04-16 15:20:36 -070095};
96
97enum securityEnum {
Jeff Layton515d82f2013-05-26 07:00:58 -040098 Unspecified = 0, /* not specified */
99 LANMAN, /* Legacy LANMAN auth */
Steve French39798772006-05-31 22:40:51 +0000100 NTLM, /* Legacy NTLM012 auth with NTLM hash */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 NTLMv2, /* Legacy NTLM auth with NTLMv2 hash */
Steve Frenchac683922009-05-06 04:16:04 +0000102 RawNTLMSSP, /* NTLMSSP without SPNEGO, NTLMv2 hash */
Steve Frenchc16fefa2008-08-19 19:35:33 +0000103 Kerberos, /* Kerberos via SPNEGO */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104};
105
Shirish Pargaonkar5f98ca92010-09-18 22:01:58 -0500106struct session_key {
Steve Frenchb609f062007-07-09 07:55:14 +0000107 unsigned int len;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500108 char *response;
Steve Frenchb609f062007-07-09 07:55:14 +0000109};
110
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500111/* crypto security descriptor definition */
112struct sdesc {
113 struct shash_desc shash;
114 char ctx[];
115};
116
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -0500117/* crypto hashing related structure/fields, not specific to a sec mech */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500118struct cifs_secmech {
119 struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
120 struct crypto_shash *md5; /* md5 hash function */
Pavel Shilovsky3c1bf7e2012-09-18 16:20:30 -0700121 struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
Steve French429b46f2013-06-26 23:45:05 -0500122 struct crypto_shash *cmacaes; /* block-cipher based MAC function */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500123 struct sdesc *sdeschmacmd5; /* ctxt to generate ntlmv2 hash, CR1 */
124 struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
Pavel Shilovsky3c1bf7e2012-09-18 16:20:30 -0700125 struct sdesc *sdeschmacsha256; /* ctxt to generate smb2 signature */
Steve French429b46f2013-06-26 23:45:05 -0500126 struct sdesc *sdesccmacaes; /* ctxt to generate smb3 signature */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500127};
128
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500129/* per smb session structure/fields */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500130struct ntlmssp_auth {
Shirish Pargaonkar5c234aa2013-08-29 08:35:10 -0500131 bool sesskey_per_smbsess; /* whether session key is per smb session */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500132 __u32 client_flags; /* sent by client in type 1 ntlmsssp exchange */
133 __u32 server_flags; /* sent by server in type 2 ntlmssp exchange */
134 unsigned char ciphertext[CIFS_CPHTXT_SIZE]; /* sent to server */
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500135 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlmssp */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500136};
137
Steve French442aa312007-09-24 20:25:46 +0000138struct cifs_cred {
139 int uid;
140 int gid;
141 int mode;
142 int cecount;
143 struct cifs_sid osid;
144 struct cifs_sid gsid;
145 struct cifs_ntace *ntaces;
146 struct cifs_ace *aces;
147};
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149/*
150 *****************************************************************
151 * Except the CIFS PDUs themselves all the
152 * globally interesting structs should go here
153 *****************************************************************
154 */
155
Jeff Laytonbf5ea0e2012-09-18 16:20:34 -0700156/*
157 * A smb_rqst represents a complete request to be issued to a server. It's
158 * formed by a kvec array, followed by an array of pages. Page data is assumed
159 * to start at the beginning of the first page.
160 */
161struct smb_rqst {
162 struct kvec *rq_iov; /* array of kvecs */
163 unsigned int rq_nvec; /* number of kvecs in array */
164 struct page **rq_pages; /* pointer to array of page ptrs */
165 unsigned int rq_npages; /* number pages in array */
166 unsigned int rq_pagesz; /* page size to use */
167 unsigned int rq_tailsz; /* length of last page */
168};
169
Jeff Layton23db65f2012-05-15 12:20:51 -0400170enum smb_version {
171 Smb_1 = 1,
Steve Frenchdd446b12012-11-28 23:21:06 -0600172 Smb_20,
Steve French1080ef72011-02-24 18:07:19 +0000173 Smb_21,
Steve Frenche4aa25e2012-10-01 12:26:22 -0500174 Smb_30,
Steve French20b6d8b2013-06-12 22:48:41 -0500175 Smb_302,
Steve French5f7fbf72014-12-17 22:52:58 -0600176#ifdef CONFIG_CIFS_SMB311
177 Smb_311,
178#endif /* SMB311 */
179 Smb_version_err
Jeff Layton23db65f2012-05-15 12:20:51 -0400180};
181
Jeff Layton121b0462012-05-15 12:21:10 -0400182struct mid_q_entry;
183struct TCP_Server_Info;
Pavel Shilovsky55157df2012-02-28 14:04:17 +0300184struct cifsFileInfo;
Pavel Shilovsky082d0642012-05-17 12:18:21 +0400185struct cifs_ses;
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +0400186struct cifs_tcon;
Pavel Shilovskyb669f332012-05-27 20:21:53 +0400187struct dfs_info3_param;
Pavel Shilovsky1208ef12012-05-27 17:34:43 +0400188struct cifs_fattr;
Pavel Shilovsky9224dfc2012-05-27 20:39:52 +0400189struct smb_vol;
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700190struct cifs_fid;
Pavel Shilovskyfc9c5962012-09-18 16:20:28 -0700191struct cifs_readdata;
Pavel Shilovskyc9de5c82012-09-18 16:20:29 -0700192struct cifs_writedata;
Pavel Shilovskyf9c6e232012-09-18 16:20:29 -0700193struct cifs_io_parms;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700194struct cifs_search_info;
Pavel Shilovsky95a3f2f2012-09-18 16:20:33 -0700195struct cifsInodeInfo;
Pavel Shilovsky226730b2013-07-05 12:00:30 +0400196struct cifs_open_parms;
Jeff Layton121b0462012-05-15 12:21:10 -0400197
Jeff Layton23db65f2012-05-15 12:20:51 -0400198struct smb_version_operations {
Jeff Layton121b0462012-05-15 12:21:10 -0400199 int (*send_cancel)(struct TCP_Server_Info *, void *,
200 struct mid_q_entry *);
Pavel Shilovsky55157df2012-02-28 14:04:17 +0300201 bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
Pavel Shilovsky082d0642012-05-17 12:18:21 +0400202 /* setup request: allocate mid, sign message */
Jeff Laytonfec344e2012-09-18 16:20:35 -0700203 struct mid_q_entry *(*setup_request)(struct cifs_ses *,
204 struct smb_rqst *);
Pavel Shilovsky45740842012-06-01 14:26:18 +0400205 /* setup async request: allocate mid, sign message */
Jeff Laytonfec344e2012-09-18 16:20:35 -0700206 struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
207 struct smb_rqst *);
Pavel Shilovsky082d0642012-05-17 12:18:21 +0400208 /* check response: verify signature, map error */
209 int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
210 bool);
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400211 void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
212 const int);
Pavel Shilovsky45275782012-05-17 17:53:29 +0400213 void (*set_credits)(struct TCP_Server_Info *, const int);
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400214 int * (*get_credits_field)(struct TCP_Server_Info *, const int);
215 unsigned int (*get_credits)(struct mid_q_entry *);
Pavel Shilovsky88257362012-05-23 14:01:59 +0400216 __u64 (*get_next_mid)(struct TCP_Server_Info *);
Pavel Shilovskyeb378712012-05-17 13:02:51 +0400217 /* data offset from read response message */
218 unsigned int (*read_data_offset)(char *);
219 /* data length from read response message */
220 unsigned int (*read_data_length)(char *);
221 /* map smb to linux error */
222 int (*map_error)(char *, bool);
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400223 /* find mid corresponding to the response message */
224 struct mid_q_entry * (*find_mid)(struct TCP_Server_Info *, char *);
225 void (*dump_detail)(void *);
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400226 void (*clear_stats)(struct cifs_tcon *);
227 void (*print_stats)(struct seq_file *m, struct cifs_tcon *);
Steve French769ee6a2013-06-19 14:15:30 -0500228 void (*dump_share_caps)(struct seq_file *, struct cifs_tcon *);
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400229 /* verify the message */
Steve French373512e2015-12-18 13:05:30 -0600230 int (*check_message)(char *, unsigned int, struct TCP_Server_Info *);
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400231 bool (*is_oplock_break)(char *, struct TCP_Server_Info *);
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000232 void (*downgrade_oplock)(struct TCP_Server_Info *,
233 struct cifsInodeInfo *, bool);
Pavel Shilovsky316cf942012-05-23 14:31:03 +0400234 /* process transaction2 response */
235 bool (*check_trans2)(struct mid_q_entry *, struct TCP_Server_Info *,
236 char *, int);
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400237 /* check if we need to negotiate */
238 bool (*need_neg)(struct TCP_Server_Info *);
239 /* negotiate to the server */
240 int (*negotiate)(const unsigned int, struct cifs_ses *);
Pavel Shilovsky24985c52012-09-18 16:20:28 -0700241 /* set negotiated write size */
242 unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
243 /* set negotiated read size */
244 unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
Pavel Shilovsky58c45c52012-05-25 10:54:49 +0400245 /* setup smb sessionn */
246 int (*sess_setup)(const unsigned int, struct cifs_ses *,
247 const struct nls_table *);
248 /* close smb session */
249 int (*logoff)(const unsigned int, struct cifs_ses *);
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +0400250 /* connect to a server share */
251 int (*tree_connect)(const unsigned int, struct cifs_ses *, const char *,
252 struct cifs_tcon *, const struct nls_table *);
253 /* close tree connecion */
254 int (*tree_disconnect)(const unsigned int, struct cifs_tcon *);
Pavel Shilovskyb669f332012-05-27 20:21:53 +0400255 /* get DFS referrals */
256 int (*get_dfs_refer)(const unsigned int, struct cifs_ses *,
257 const char *, struct dfs_info3_param **,
258 unsigned int *, const struct nls_table *, int);
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +0400259 /* informational QFS call */
260 void (*qfs_tcon)(const unsigned int, struct cifs_tcon *);
Pavel Shilovsky68889f22012-05-25 14:40:22 +0400261 /* check if a path is accessible or not */
262 int (*is_path_accessible)(const unsigned int, struct cifs_tcon *,
263 struct cifs_sb_info *, const char *);
Pavel Shilovsky1208ef12012-05-27 17:34:43 +0400264 /* query path data from the server */
265 int (*query_path_info)(const unsigned int, struct cifs_tcon *,
266 struct cifs_sb_info *, const char *,
Pavel Shilovskyeb85d94b2013-10-23 17:49:47 +0400267 FILE_ALL_INFO *, bool *, bool *);
Pavel Shilovsky4ad65042012-09-18 16:20:26 -0700268 /* query file data from the server */
269 int (*query_file_info)(const unsigned int, struct cifs_tcon *,
270 struct cifs_fid *, FILE_ALL_INFO *);
Pavel Shilovsky1208ef12012-05-27 17:34:43 +0400271 /* get server index number */
272 int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
273 struct cifs_sb_info *, const char *,
274 u64 *uniqueid, FILE_ALL_INFO *);
Pavel Shilovskyd1433412012-09-18 16:20:31 -0700275 /* set size by path */
276 int (*set_path_size)(const unsigned int, struct cifs_tcon *,
277 const char *, __u64, struct cifs_sb_info *, bool);
278 /* set size by file handle */
279 int (*set_file_size)(const unsigned int, struct cifs_tcon *,
280 struct cifsFileInfo *, __u64, bool);
Pavel Shilovsky6bdf6db2012-09-18 16:20:32 -0700281 /* set attributes */
282 int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
283 const unsigned int);
Steve French64a5cfa2013-10-14 15:31:32 -0500284 int (*set_compression)(const unsigned int, struct cifs_tcon *,
285 struct cifsFileInfo *);
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400286 /* check if we can send an echo or nor */
287 bool (*can_echo)(struct TCP_Server_Info *);
288 /* send echo request */
289 int (*echo)(struct TCP_Server_Info *);
Pavel Shilovskyf4367202012-03-17 11:41:12 +0300290 /* create directory */
291 int (*mkdir)(const unsigned int, struct cifs_tcon *, const char *,
292 struct cifs_sb_info *);
293 /* set info on created directory */
294 void (*mkdir_setinfo)(struct inode *, const char *,
295 struct cifs_sb_info *, struct cifs_tcon *,
296 const unsigned int);
Pavel Shilovskyf958ca52012-07-10 16:14:18 +0400297 /* remove directory */
298 int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
299 struct cifs_sb_info *);
Pavel Shilovskyed6875e2012-09-18 16:20:25 -0700300 /* unlink file */
301 int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
302 struct cifs_sb_info *);
303 /* open, rename and delete file */
304 int (*rename_pending_delete)(const char *, struct dentry *,
305 const unsigned int);
Pavel Shilovsky8ceb9842012-09-18 16:20:30 -0700306 /* send rename request */
307 int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
308 const char *, struct cifs_sb_info *);
Steve Frenchd6e906f2012-09-18 16:20:31 -0700309 /* send create hardlink request */
310 int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
311 const char *, const char *,
312 struct cifs_sb_info *);
Pavel Shilovskyb42bf882013-08-14 19:25:21 +0400313 /* query symlink target */
314 int (*query_symlink)(const unsigned int, struct cifs_tcon *,
315 const char *, char **, struct cifs_sb_info *);
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700316 /* open a file for non-posix mounts */
Pavel Shilovsky226730b2013-07-05 12:00:30 +0400317 int (*open)(const unsigned int, struct cifs_open_parms *,
318 __u32 *, FILE_ALL_INFO *);
Pavel Shilovskyfb1214e2012-09-18 16:20:26 -0700319 /* set fid protocol-specific info */
320 void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
Pavel Shilovsky0ff78a22012-09-18 16:20:26 -0700321 /* close a file */
Pavel Shilovsky760ad0c2012-09-25 11:00:07 +0400322 void (*close)(const unsigned int, struct cifs_tcon *,
323 struct cifs_fid *);
Pavel Shilovsky1d8c4c02012-09-18 16:20:27 -0700324 /* send a flush request to the server */
325 int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
Pavel Shilovskyfc9c5962012-09-18 16:20:28 -0700326 /* async read from the server */
327 int (*async_readv)(struct cifs_readdata *);
Pavel Shilovskyc9de5c82012-09-18 16:20:29 -0700328 /* async write to the server */
Steve French4a5c80d2014-02-07 20:45:12 -0600329 int (*async_writev)(struct cifs_writedata *,
330 void (*release)(struct kref *));
Pavel Shilovskyf9c6e232012-09-18 16:20:29 -0700331 /* sync read from the server */
Steve Frenchdb8b6312014-09-22 05:13:55 -0500332 int (*sync_read)(const unsigned int, struct cifs_fid *,
Pavel Shilovskyf9c6e232012-09-18 16:20:29 -0700333 struct cifs_io_parms *, unsigned int *, char **,
334 int *);
Pavel Shilovskyba9ad7252012-09-18 16:20:30 -0700335 /* sync write to the server */
Steve Frenchdb8b6312014-09-22 05:13:55 -0500336 int (*sync_write)(const unsigned int, struct cifs_fid *,
Pavel Shilovskyba9ad7252012-09-18 16:20:30 -0700337 struct cifs_io_parms *, unsigned int *, struct kvec *,
338 unsigned long);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700339 /* open dir, start readdir */
340 int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
341 const char *, struct cifs_sb_info *,
342 struct cifs_fid *, __u16,
343 struct cifs_search_info *);
344 /* continue readdir */
345 int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
346 struct cifs_fid *,
347 __u16, struct cifs_search_info *srch_inf);
348 /* close dir */
349 int (*close_dir)(const unsigned int, struct cifs_tcon *,
350 struct cifs_fid *);
351 /* calculate a size of SMB message */
352 unsigned int (*calc_smb_size)(void *);
Pavel Shilovsky2e44b282012-09-18 16:20:33 -0700353 /* check for STATUS_PENDING and process it in a positive case */
354 bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
Pavel Shilovsky95a3f2f2012-09-18 16:20:33 -0700355 /* send oplock break response */
356 int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
357 struct cifsInodeInfo *);
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700358 /* query remote filesystem */
359 int (*queryfs)(const unsigned int, struct cifs_tcon *,
360 struct kstatfs *);
Pavel Shilovskyd39a4f72012-09-19 06:22:43 -0700361 /* send mandatory brlock to the server */
362 int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
363 __u64, __u32, int, int, bool);
364 /* unlock range of mandatory locks */
365 int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
366 const unsigned int);
367 /* push brlocks from the cache to the server */
368 int (*push_mand_locks)(struct cifsFileInfo *);
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700369 /* get lease key of the inode */
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400370 void (*get_lease_key)(struct inode *, struct cifs_fid *);
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700371 /* set lease key of the inode */
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400372 void (*set_lease_key)(struct inode *, struct cifs_fid *);
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700373 /* generate new lease key */
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400374 void (*new_lease_key)(struct cifs_fid *);
Shirish Pargaonkar32811d22013-08-29 08:35:11 -0500375 int (*generate_signingkey)(struct cifs_ses *);
Pavel Shilovsky53ef1012013-09-05 16:11:28 +0400376 int (*calc_signature)(struct smb_rqst *, struct TCP_Server_Info *);
Steve Frenchb3152e22015-06-24 03:17:02 -0500377 int (*set_integrity)(const unsigned int, struct cifs_tcon *tcon,
378 struct cifsFileInfo *src_file);
Sachin Prabhub5be1a12013-11-25 17:09:49 +0000379 int (*query_mf_symlink)(unsigned int, struct cifs_tcon *,
380 struct cifs_sb_info *, const unsigned char *,
381 char *, unsigned int *);
Sachin Prabhucbb0aba2013-11-25 17:09:52 +0000382 int (*create_mf_symlink)(unsigned int, struct cifs_tcon *,
383 struct cifs_sb_info *, const unsigned char *,
384 char *, unsigned int *);
Pavel Shilovsky53ef1012013-09-05 16:11:28 +0400385 /* if we can do cache read operations */
386 bool (*is_read_op)(__u32);
387 /* set oplock level for the inode */
Pavel Shilovsky42873b02013-09-05 21:30:16 +0400388 void (*set_oplock_level)(struct cifsInodeInfo *, __u32, unsigned int,
389 bool *);
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400390 /* create lease context buffer for CREATE request */
391 char * (*create_lease_buf)(u8 *, u8);
Pavel Shilovsky42873b02013-09-05 21:30:16 +0400392 /* parse lease context buffer and return oplock/epoch info */
393 __u8 (*parse_lease_buf)(void *, unsigned int *);
Steve French41c13582013-11-14 00:05:36 -0600394 int (*clone_range)(const unsigned int, struct cifsFileInfo *src_file,
395 struct cifsFileInfo *target_file, u64 src_off, u64 len,
396 u64 dest_off);
Steve French02b16662015-06-27 21:18:36 -0700397 int (*duplicate_extents)(const unsigned int, struct cifsFileInfo *src,
398 struct cifsFileInfo *target_file, u64 src_off, u64 len,
399 u64 dest_off);
Steve Frenchff1c0382013-11-19 23:44:46 -0600400 int (*validate_negotiate)(const unsigned int, struct cifs_tcon *);
Steve French666753c2014-01-26 23:53:43 -0600401 ssize_t (*query_all_EAs)(const unsigned int, struct cifs_tcon *,
402 const unsigned char *, const unsigned char *, char *,
403 size_t, const struct nls_table *, int);
404 int (*set_EA)(const unsigned int, struct cifs_tcon *, const char *,
405 const char *, const void *, const __u16,
406 const struct nls_table *, int);
Steve French83e3bc22014-02-02 23:31:47 -0600407 struct cifs_ntsd * (*get_acl)(struct cifs_sb_info *, struct inode *,
408 const char *, u32 *);
Steve French42eacf92014-02-10 14:08:16 -0600409 struct cifs_ntsd * (*get_acl_by_fid)(struct cifs_sb_info *,
410 const struct cifs_fid *, u32 *);
Steve French83e3bc22014-02-02 23:31:47 -0600411 int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
412 int);
Pavel Shilovsky7f6c5002014-06-22 11:03:22 +0400413 /* writepages retry size */
414 unsigned int (*wp_retry_size)(struct inode *);
Pavel Shilovskycb7e9ea2014-06-05 19:03:27 +0400415 /* get mtu credits */
416 int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
417 unsigned int *, unsigned int *);
Pavel Shilovsky52755802014-08-18 20:49:57 +0400418 /* check if we need to issue closedir */
419 bool (*dir_needs_close)(struct cifsFileInfo *);
Steve French31742c52014-08-17 08:38:47 -0500420 long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
421 loff_t);
Jeff Layton23db65f2012-05-15 12:20:51 -0400422};
423
424struct smb_version_values {
425 char *version_string;
Steve Frenche4aa25e2012-10-01 12:26:22 -0500426 __u16 protocol_id;
427 __u32 req_capabilities;
Pavel Shilovsky106dc532012-02-28 14:23:34 +0300428 __u32 large_lock_type;
429 __u32 exclusive_lock_type;
430 __u32 shared_lock_type;
431 __u32 unlock_lock_type;
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400432 size_t header_size;
433 size_t max_header_size;
Pavel Shilovskyeb378712012-05-17 13:02:51 +0400434 size_t read_rsp_size;
Pavel Shilovsky2dc7e1c2011-12-26 22:53:34 +0400435 __le16 lock_cmd;
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400436 unsigned int cap_unix;
437 unsigned int cap_nt_find;
438 unsigned int cap_large_files;
Jeff Layton50285882013-06-27 12:45:00 -0400439 __u16 signing_enabled;
440 __u16 signing_required;
Pavel Shilovskya41a28b2013-09-04 13:07:41 +0400441 size_t create_lease_size;
Jeff Layton23db65f2012-05-15 12:20:51 -0400442};
443
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400444#define HEADER_SIZE(server) (server->vals->header_size)
445#define MAX_HEADER_SIZE(server) (server->vals->max_header_size)
446
Steve Frenchf87d39d2011-05-27 03:50:55 +0000447struct smb_vol {
448 char *username;
449 char *password;
450 char *domainname;
451 char *UNC;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000452 char *iocharset; /* local code page for mapping to and from Unicode */
453 char source_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* clnt nb name */
454 char target_rfc1001_name[RFC1001_NAME_LEN_WITH_NULL]; /* srvr nb name */
Eric W. Biederman3da46562013-02-06 01:37:39 -0800455 kuid_t cred_uid;
456 kuid_t linux_uid;
457 kgid_t linux_gid;
458 kuid_t backupuid;
459 kgid_t backupgid;
Al Viro5206efd2011-07-26 03:22:14 -0400460 umode_t file_mode;
461 umode_t dir_mode;
Jeff Layton1e3cc572013-06-10 17:12:23 -0500462 enum securityEnum sectype; /* sectype requested via mnt opts */
463 bool sign; /* was signing requested via mnt opts? */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000464 bool retry:1;
465 bool intr:1;
466 bool setuids:1;
467 bool override_uid:1;
468 bool override_gid:1;
469 bool dynperm:1;
470 bool noperm:1;
471 bool no_psx_acl:1; /* set if posix acl support should be disabled */
472 bool cifs_acl:1;
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -0500473 bool backupuid_specified; /* mount option backupuid is specified */
474 bool backupgid_specified; /* mount option backupgid is specified */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000475 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
476 bool server_ino:1; /* use inode numbers from server ie UniqueId */
477 bool direct_io:1;
478 bool strict_io:1; /* strict cache behavior */
479 bool remap:1; /* set to remap seven reserved chars in filenames */
Steve French2baa2682014-09-27 02:19:01 -0500480 bool sfu_remap:1; /* remap seven reserved chars ala SFU */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000481 bool posix_paths:1; /* unset to not ask for posix pathnames. */
482 bool no_linux_ext:1;
483 bool sfu_emul:1;
484 bool nullauth:1; /* attempt to authenticate with null user */
485 bool nocase:1; /* request case insensitive filenames */
486 bool nobrl:1; /* disable sending byte range locks to srv */
487 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
488 bool seal:1; /* request transport encryption on share */
489 bool nodfs:1; /* Do not request DFS, even if available */
490 bool local_lease:1; /* check leases only on local system, not remote */
491 bool noblocksnd:1;
492 bool noautotune:1;
493 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
494 bool fsc:1; /* enable fscache */
495 bool mfsymlinks:1; /* use Minshall+French Symlinks */
496 bool multiuser:1;
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000497 bool rwpidforward:1; /* pid forward for read/write operations */
Steve Frenchb2a30772015-09-29 21:49:28 -0500498 bool nosharesock:1;
499 bool persistent:1;
500 bool nopersistent:1;
Steve French592fafe2015-11-03 10:08:53 -0600501 bool resilient:1; /* noresilient not required since not fored for CA */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000502 unsigned int rsize;
503 unsigned int wsize;
504 bool sockopt_tcp_nodelay:1;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000505 unsigned long actimeo; /* attribute cache timeout (jiffies) */
Jeff Layton23db65f2012-05-15 12:20:51 -0400506 struct smb_version_operations *ops;
507 struct smb_version_values *vals;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000508 char *prepath;
Jeff Laytonb979aaa2012-11-26 11:09:55 -0500509 struct sockaddr_storage dstaddr; /* destination address */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000510 struct sockaddr_storage srcaddr; /* allow binding to a local IP */
511 struct nls_table *local_nls;
Steve Frenchadfeb3e2015-12-18 12:31:36 -0600512 unsigned int echo_interval; /* echo interval in secs */
Steve Frenchf87d39d2011-05-27 03:50:55 +0000513};
514
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400515#define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
516 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
517 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
Steve French2baa2682014-09-27 02:19:01 -0500518 CIFS_MOUNT_MAP_SFM_CHR | \
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400519 CIFS_MOUNT_UNX_EMUL | CIFS_MOUNT_NO_BRL | \
520 CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_OVERR_UID | \
521 CIFS_MOUNT_OVERR_GID | CIFS_MOUNT_DYNPERM | \
522 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
523 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -0500524 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
525 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400526
527#define CIFS_MS_MASK (MS_RDONLY | MS_MANDLOCK | MS_NOEXEC | MS_NOSUID | \
528 MS_NODEV | MS_SYNCHRONOUS)
529
530struct cifs_mnt_data {
531 struct cifs_sb_info *cifs_sb;
532 struct smb_vol *vol;
533 int flags;
534};
535
Pavel Shilovsky792af7b2012-03-23 14:28:02 -0400536static inline unsigned int
537get_rfc1002_length(void *buf)
538{
Jeff Laytondca1c8d2014-02-22 19:35:38 -0500539 return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
Pavel Shilovsky792af7b2012-03-23 14:28:02 -0400540}
541
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400542static inline void
543inc_rfc1001_len(void *buf, int count)
544{
545 be32_add_cpu((__be32 *)buf, count);
546}
547
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548struct TCP_Server_Info {
Steve French3b795212008-11-13 19:45:32 +0000549 struct list_head tcp_ses_list;
550 struct list_head smb_ses_list;
Jeff Laytone7ddee92008-11-14 13:44:38 -0500551 int srv_count; /* reference counter */
Steve Frencha10faeb22005-08-22 21:38:31 -0700552 /* 15 character server name + 0x20 16th byte indicating type = srv */
Jeff Layton8ecaf672008-12-01 15:23:50 -0500553 char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
Jeff Layton23db65f2012-05-15 12:20:51 -0400554 struct smb_version_operations *ops;
555 struct smb_version_values *vals;
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500556 enum statusEnum tcpStatus; /* what we think the status is */
Jeff Laytonc359cf32007-11-16 22:22:06 +0000557 char *hostname; /* hostname portion of UNC string */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 struct socket *ssocket;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300559 struct sockaddr_storage dstaddr;
Ben Greear3eb9a882010-09-01 17:06:02 -0700560 struct sockaddr_storage srcaddr; /* locally bind to this IP */
Rob Landleyf1d0c992011-01-22 15:44:05 -0600561#ifdef CONFIG_NET_NS
562 struct net *net;
563#endif
Steve Frenchd38d8c72007-06-28 19:44:13 +0000564 wait_queue_head_t response_q;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/
566 struct list_head pending_mid_q;
Steve Frenchedf1ae42008-10-29 00:47:57 +0000567 bool noblocksnd; /* use blocking sendmsg */
568 bool noautotune; /* do not autotune send buf sizes */
Steve French6a5fa2362010-01-01 01:28:43 +0000569 bool tcp_nodelay;
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400570 int credits; /* send no more requests at once */
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300571 unsigned int in_flight; /* number of requests on the wire to server */
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400572 spinlock_t req_lock; /* protect the two values above */
Jeff Layton72ca5452008-12-01 07:09:36 -0500573 struct mutex srv_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 struct task_struct *tsk;
575 char server_GUID[16];
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400576 __u16 sec_mode;
Jeff Layton38d77c52013-05-26 07:01:00 -0400577 bool sign; /* is signing enabled on this connection? */
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500578 bool session_estab; /* mark when very first sess is established */
Pavel Shilovsky28ea5292012-05-23 16:18:00 +0400579#ifdef CONFIG_CIFS_SMB2
580 int echo_credits; /* echo reserved slots */
581 int oplock_credits; /* oplock break reserved slots */
582 bool echoes:1; /* enable echoes */
Sachin Prabhu39552ea2014-05-13 00:48:12 +0100583 __u8 client_guid[SMB2_CLIENT_GUID_SIZE]; /* Client GUID */
Pavel Shilovsky28ea5292012-05-23 16:18:00 +0400584#endif
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500585 u16 dialect; /* dialect index that server chose */
Pavel Shilovsky10b9b982012-03-20 12:55:09 +0300586 bool oplocks:1; /* enable oplocks */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 unsigned int maxReq; /* Clients should submit no more */
588 /* than maxReq distinct unanswered SMBs to the server when using */
589 /* multiplexed reads or writes */
590 unsigned int maxBuf; /* maxBuf specifies the maximum */
591 /* message size the server can send or receive for non-raw SMBs */
Steve French7e90d702011-02-08 23:52:32 +0000592 /* maxBuf is returned by SMB NegotiateProtocol so maxBuf is only 0 */
593 /* when socket is setup (and during reconnect) before NegProt sent */
Steve Frencheca6acf2009-02-20 05:43:09 +0000594 unsigned int max_rw; /* maxRw specifies the maximum */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 /* message size the server can send or receive for */
596 /* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400597 unsigned int capabilities; /* selective disabling of caps by smb sess */
Steve Frenchde7ed552006-09-30 13:25:52 +0000598 int timeAdj; /* Adjust for difference in server time zone in sec */
Pavel Shilovsky243d04b2012-03-23 14:28:03 -0400599 __u64 CurrentMid; /* multiplex id - rotating counter */
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -0500600 char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
Steve Frencha10faeb22005-08-22 21:38:31 -0700601 /* 16th byte of RFC1001 workstation name is always null */
Jeff Layton8ecaf672008-12-01 15:23:50 -0500602 char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
Jeff Laytona0f8b4f2011-01-07 11:30:28 -0500603 __u32 sequence_number; /* for signing, protected by srv_mutex */
Shirish Pargaonkar5f98ca92010-09-18 22:01:58 -0500604 struct session_key session_key;
Steve French3a5ff612006-07-14 22:37:11 +0000605 unsigned long lstrp; /* when we got last response from this server */
Shirish Pargaonkard2b91522010-10-21 14:25:08 -0500606 struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */
Jeff Laytone598d1d82013-05-26 07:00:59 -0400607#define CIFS_NEGFLAVOR_LANMAN 0 /* wct == 13, LANMAN */
608#define CIFS_NEGFLAVOR_UNENCAP 1 /* wct == 17, but no ext_sec */
609#define CIFS_NEGFLAVOR_EXTENDED 2 /* wct == 17, ext_sec bit set */
610 char negflavor; /* NEGOTIATE response flavor */
Jeff Layton26efa0b2010-04-24 07:57:49 -0400611 /* extended security flavors that server supports */
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500612 bool sec_ntlmssp; /* supports NTLMSSP */
613 bool sec_kerberosu2u; /* supports U2U Kerberos */
Jeff Layton26efa0b2010-04-24 07:57:49 -0400614 bool sec_kerberos; /* supports plain Kerberos */
615 bool sec_mskerberos; /* supports legacy MS Kerberos */
Jeff Layton2a37ef92011-10-19 15:29:23 -0400616 bool large_buf; /* is current buffer large? */
Jeff Laytonc74093b2011-01-11 07:24:23 -0500617 struct delayed_work echo; /* echo ping workqueue job */
Jeff Layton1041e3f2011-10-19 15:28:27 -0400618 struct kvec *iov; /* reusable kvec array for receives */
619 unsigned int nr_iov; /* number of kvecs in array */
Jeff Layton2a37ef92011-10-19 15:29:23 -0400620 char *smallbuf; /* pointer to current "small" buffer */
621 char *bigbuf; /* pointer to current "big" buffer */
622 unsigned int total_read; /* total amount of data read in this pass */
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +0530623#ifdef CONFIG_CIFS_FSCACHE
624 struct fscache_cookie *fscache; /* client index cache cookie */
625#endif
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500626#ifdef CONFIG_CIFS_STATS2
Steve French789e6662011-08-09 18:44:44 +0000627 atomic_t in_send; /* requests trying to send */
Jeff Laytonc3dccf42011-01-20 13:36:50 -0500628 atomic_t num_waiters; /* blocked waiting to get in sendrecv */
629#endif
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400630#ifdef CONFIG_CIFS_SMB2
631 unsigned int max_read;
632 unsigned int max_write;
Steve French373512e2015-12-18 13:05:30 -0600633 __u8 preauth_hash[512];
Pavel Shilovskyec2e4522011-12-27 16:12:43 +0400634#endif /* CONFIG_CIFS_SMB2 */
Steve Frenchadfeb3e2015-12-18 12:31:36 -0600635 unsigned long echo_interval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636};
637
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300638static inline unsigned int
639in_flight(struct TCP_Server_Info *server)
640{
641 unsigned int num;
642 spin_lock(&server->req_lock);
643 num = server->in_flight;
644 spin_unlock(&server->req_lock);
645 return num;
646}
647
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400648static inline bool
Pavel Shilovskybc205ed2012-03-15 13:22:27 +0300649has_credits(struct TCP_Server_Info *server, int *credits)
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300650{
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400651 int num;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300652 spin_lock(&server->req_lock);
Pavel Shilovskybc205ed2012-03-15 13:22:27 +0300653 num = *credits;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300654 spin_unlock(&server->req_lock);
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400655 return num > 0;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300656}
657
Pavel Shilovsky45275782012-05-17 17:53:29 +0400658static inline void
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400659add_credits(struct TCP_Server_Info *server, const unsigned int add,
660 const int optype)
Pavel Shilovsky45275782012-05-17 17:53:29 +0400661{
Pavel Shilovskya891f0f2012-05-23 16:14:34 +0400662 server->ops->add_credits(server, add, optype);
Pavel Shilovsky45275782012-05-17 17:53:29 +0400663}
664
665static inline void
Pavel Shilovskycb7e9ea2014-06-05 19:03:27 +0400666add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
667 const int optype)
668{
669 if (add) {
670 server->ops->add_credits(server, add, optype);
671 wake_up(&server->request_q);
672 }
673}
674
675static inline void
Pavel Shilovsky45275782012-05-17 17:53:29 +0400676set_credits(struct TCP_Server_Info *server, const int val)
677{
678 server->ops->set_credits(server, val);
679}
680
Sachin Prabhu9235d092014-12-09 17:37:00 +0000681static inline __le64
Tim Gardner3d378d32013-11-02 12:50:34 -0500682get_next_mid64(struct TCP_Server_Info *server)
Pavel Shilovsky88257362012-05-23 14:01:59 +0400683{
Sachin Prabhu9235d092014-12-09 17:37:00 +0000684 return cpu_to_le64(server->ops->get_next_mid(server));
Pavel Shilovsky88257362012-05-23 14:01:59 +0400685}
686
Tim Gardner3d378d32013-11-02 12:50:34 -0500687static inline __le16
688get_next_mid(struct TCP_Server_Info *server)
689{
Sachin Prabhu9235d092014-12-09 17:37:00 +0000690 __u16 mid = server->ops->get_next_mid(server);
Tim Gardner3d378d32013-11-02 12:50:34 -0500691 /*
692 * The value in the SMB header should be little endian for easy
693 * on-the-wire decoding.
694 */
695 return cpu_to_le16(mid);
696}
697
698static inline __u16
699get_mid(const struct smb_hdr *smb)
700{
701 return le16_to_cpu(smb->Mid);
702}
703
704static inline bool
705compare_mid(__u16 mid, const struct smb_hdr *smb)
706{
707 return mid == le16_to_cpu(smb->Mid);
708}
709
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710/*
Pavel Shilovsky24985c52012-09-18 16:20:28 -0700711 * When the server supports very large reads and writes via POSIX extensions,
712 * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
713 * including the RFC1001 length.
714 *
715 * Note that this might make for "interesting" allocation problems during
716 * writeback however as we have to allocate an array of pointers for the
717 * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
718 *
719 * For reads, there is a similar problem as we need to allocate an array
720 * of kvecs to handle the receive, though that should only need to be done
721 * once.
722 */
723#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
724#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
725
726/*
727 * When the server doesn't allow large posix writes, only allow a rsize/wsize
728 * of 2^17-1 minus the size of the call header. That allows for a read or
729 * write up to the maximum size described by RFC1002.
730 */
731#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
732#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
733
734/*
735 * The default wsize is 1M. find_get_pages seems to return a maximum of 256
736 * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
737 * a single wsize request with a single call.
738 */
739#define CIFS_DEFAULT_IOSIZE (1024 * 1024)
740
741/*
742 * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
743 * those values when posix extensions aren't in force. In actuality here, we
744 * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
745 * to be ok with the extra byte even though Windows doesn't send writes that
746 * are that large.
747 *
748 * Citation:
749 *
750 * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
751 */
752#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
753#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
754
755/*
Rob Landleyf1d0c992011-01-22 15:44:05 -0600756 * Macros to allow the TCP_Server_Info->net field and related code to drop out
757 * when CONFIG_NET_NS isn't set.
758 */
759
760#ifdef CONFIG_NET_NS
761
762static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
763{
764 return srv->net;
765}
766
767static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
768{
769 srv->net = net;
770}
771
772#else
773
774static inline struct net *cifs_net_ns(struct TCP_Server_Info *srv)
775{
776 return &init_net;
777}
778
779static inline void cifs_set_net_ns(struct TCP_Server_Info *srv, struct net *net)
780{
781}
782
783#endif
784
785/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 * Session structure. One of these for each uid session with a particular host
787 */
Steve French96daf2b2011-05-27 04:34:02 +0000788struct cifs_ses {
Jeff Layton14fbf502008-11-14 13:53:46 -0500789 struct list_head smb_ses_list;
Steve French3b795212008-11-13 19:45:32 +0000790 struct list_head tcon_list;
Steve Frenchd7b619c2010-02-25 05:36:46 +0000791 struct mutex session_mutex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 struct TCP_Server_Info *server; /* pointer to server info */
Jeff Layton14fbf502008-11-14 13:53:46 -0500793 int ses_count; /* reference counter */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 enum statusEnum status;
Steve French750d1152006-06-27 06:28:30 +0000795 unsigned overrideSecFlg; /* if non-zero override global sec flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 __u16 ipc_tid; /* special tid for connection to IPC share */
Steve Frenchad009ac2005-04-28 22:41:05 -0700797 char *serverOS; /* name of operating system underlying server */
798 char *serverNOS; /* name of network operating system of server */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 char *serverDomain; /* security realm of server */
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400800 __u64 Suid; /* remote smb uid */
Eric W. Biederman64ed39d2013-02-06 02:30:39 -0800801 kuid_t linux_uid; /* overriding owner of files on the mount */
802 kuid_t cred_uid; /* owner of credentials */
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400803 unsigned int capabilities;
Steve Frenchd38d8c72007-06-28 19:44:13 +0000804 char serverName[SERVER_NAME_LEN_WITH_NULL * 2]; /* BB make bigger for
Steve Frenchad009ac2005-04-28 22:41:05 -0700805 TCP names - will ipv6 and sctp addresses fit? */
Steve French34c87902011-03-01 05:02:57 +0000806 char *user_name; /* must not be null except during init of sess
807 and after mount option parsing we fill it */
Steve Frenchd38d8c72007-06-28 19:44:13 +0000808 char *domainName;
809 char *password;
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -0500810 struct session_key auth_key;
Shirish Pargaonkard3686d52010-10-28 09:53:07 -0500811 struct ntlmssp_auth *ntlmssp; /* ciphertext, flags, server challenge */
Jeff Layton28e11bd2013-05-26 07:01:00 -0400812 enum securityEnum sectype; /* what security flavor was specified? */
813 bool sign; /* is signing required? */
Steve French3b795212008-11-13 19:45:32 +0000814 bool need_reconnect:1; /* connection reset, uid now invalid */
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400815#ifdef CONFIG_CIFS_SMB2
816 __u16 session_flags;
Steve French373512e2015-12-18 13:05:30 -0600817 __u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];
818 __u8 smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
819 __u8 smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
820 __u8 preauth_hash[512];
Pavel Shilovsky5478f9b2011-12-27 16:22:00 +0400821#endif /* CONFIG_CIFS_SMB2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822};
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700823
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400824static inline bool
825cap_unix(struct cifs_ses *ses)
826{
827 return ses->server->vals->cap_unix & ses->capabilities;
828}
829
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830/*
831 * there is one of these for each connection to a resource on a particular
Steve Frenchd38d8c72007-06-28 19:44:13 +0000832 * session
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 */
Steve French96daf2b2011-05-27 04:34:02 +0000834struct cifs_tcon {
Jeff Laytonf1987b42008-11-15 11:12:47 -0500835 struct list_head tcon_list;
836 int tc_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 struct list_head openFileList;
Steve French96daf2b2011-05-27 04:34:02 +0000838 struct cifs_ses *ses; /* pointer to session associated with */
Steve French254e55e2006-06-04 05:53:15 +0000839 char treeName[MAX_TREE_SIZE + 1]; /* UNC name of resource in ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 char *nativeFileSystem;
Jeff Layton00e485b2008-12-05 20:41:21 -0500841 char *password; /* for share-level security */
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400842 __u32 tid; /* The 4 byte tree id */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 __u16 Flags; /* optional support bits */
844 enum statusEnum tidStatus;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845#ifdef CONFIG_CIFS_STATS
846 atomic_t num_smbs_sent;
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400847 union {
848 struct {
849 atomic_t num_writes;
850 atomic_t num_reads;
851 atomic_t num_flushes;
852 atomic_t num_oplock_brks;
853 atomic_t num_opens;
854 atomic_t num_closes;
855 atomic_t num_deletes;
856 atomic_t num_mkdirs;
857 atomic_t num_posixopens;
858 atomic_t num_posixmkdirs;
859 atomic_t num_rmdirs;
860 atomic_t num_renames;
861 atomic_t num_t2renames;
862 atomic_t num_ffirst;
863 atomic_t num_fnext;
864 atomic_t num_fclose;
865 atomic_t num_hardlinks;
866 atomic_t num_symlinks;
867 atomic_t num_locks;
868 atomic_t num_acl_get;
869 atomic_t num_acl_set;
870 } cifs_stats;
Pavel Shilovskyd60622e2012-05-28 15:19:39 +0400871#ifdef CONFIG_CIFS_SMB2
872 struct {
873 atomic_t smb2_com_sent[NUMBER_OF_SMB2_COMMANDS];
874 atomic_t smb2_com_failed[NUMBER_OF_SMB2_COMMANDS];
875 } smb2_stats;
876#endif /* CONFIG_CIFS_SMB2 */
Pavel Shilovsky44c58182012-05-28 14:16:31 +0400877 } stats;
Steve Frencha5a2b482005-08-20 21:42:53 -0700878#ifdef CONFIG_CIFS_STATS2
879 unsigned long long time_writes;
880 unsigned long long time_reads;
881 unsigned long long time_opens;
882 unsigned long long time_deletes;
883 unsigned long long time_closes;
884 unsigned long long time_mkdirs;
885 unsigned long long time_rmdirs;
886 unsigned long long time_renames;
887 unsigned long long time_t2renames;
888 unsigned long long time_ffirst;
889 unsigned long long time_fnext;
890 unsigned long long time_fclose;
891#endif /* CONFIG_CIFS_STATS2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 __u64 bytes_read;
893 __u64 bytes_written;
894 spinlock_t stat_lock;
Steve Frencha5a2b482005-08-20 21:42:53 -0700895#endif /* CONFIG_CIFS_STATS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 FILE_SYSTEM_DEVICE_INFO fsDevInfo;
Steve French254e55e2006-06-04 05:53:15 +0000897 FILE_SYSTEM_ATTRIBUTE_INFO fsAttrInfo; /* ok if fs name truncated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 FILE_SYSTEM_UNIX_INFO fsUnixInfo;
Steve French4b18f2a2008-04-29 00:06:05 +0000899 bool ipc:1; /* set if connection to IPC$ eg for RPC/PIPES */
900 bool retry:1;
901 bool nocase:1;
Steve French95b1cb92008-05-15 16:44:38 +0000902 bool seal:1; /* transport encryption for this mounted share */
Steve French4b18f2a2008-04-29 00:06:05 +0000903 bool unix_ext:1; /* if false disable Linux extensions to CIFS protocol
Steve Frenchc18c8422007-07-18 23:21:09 +0000904 for this mount even if server would support */
Steve French84210e92008-10-23 04:42:37 +0000905 bool local_lease:1; /* check leases (only) on local system not remote */
Steve French64cc2c62009-03-04 19:54:08 +0000906 bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
Steve French3d1a3742014-08-11 21:05:25 -0500907 bool broken_sparse_sup; /* if server or share does not support sparse */
Steve French3b795212008-11-13 19:45:32 +0000908 bool need_reconnect:1; /* connection reset, tid now invalid */
Steve French592fafe2015-11-03 10:08:53 -0600909 bool use_resilient:1; /* use resilient instead of durable handles */
Steve Frenchb618f002015-11-03 09:15:03 -0600910 bool use_persistent:1; /* use persistent instead of durable handles */
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400911#ifdef CONFIG_CIFS_SMB2
912 bool print:1; /* set if connection to printer share */
913 bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
Steve French769ee6a2013-06-19 14:15:30 -0500914 __le32 capabilities;
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400915 __u32 share_flags;
916 __u32 maximal_access;
917 __u32 vol_serial_number;
918 __le64 vol_create_time;
Steven Frenchaf6a12e2013-10-09 20:55:53 -0500919 __u32 ss_flags; /* sector size flags */
920 __u32 perf_sector_size; /* best sector size for perf */
Steve Frenchde9f68d2013-11-15 11:26:24 -0600921 __u32 max_chunks;
922 __u32 max_bytes_chunk;
923 __u32 max_bytes_copy;
Pavel Shilovskyfaaf9462011-12-27 16:04:00 +0400924#endif /* CONFIG_CIFS_SMB2 */
Suresh Jayaramand03382c2010-07-05 18:12:27 +0530925#ifdef CONFIG_CIFS_FSCACHE
926 u64 resource_id; /* server resource id */
927 struct fscache_cookie *fscache; /* cookie for share */
928#endif
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700929 struct list_head pending_opens; /* list of incomplete opens */
Steve Frenchc18c8422007-07-18 23:21:09 +0000930 /* BB add field for back pointer to sb struct(s)? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931};
932
933/*
Jeff Layton7ffec372010-09-29 19:51:11 -0400934 * This is a refcounted and timestamped container for a tcon pointer. The
935 * container holds a tcon reference. It is considered safe to free one of
936 * these when the tl_count goes to 0. The tl_time is the time of the last
937 * "get" on the container.
938 */
939struct tcon_link {
Jeff Laytonb647c352010-10-28 11:16:44 -0400940 struct rb_node tl_rbnode;
Eric W. Biederman6d4a0832013-02-06 01:48:56 -0800941 kuid_t tl_uid;
Jeff Layton9d002df2010-10-06 19:51:11 -0400942 unsigned long tl_flags;
943#define TCON_LINK_MASTER 0
944#define TCON_LINK_PENDING 1
945#define TCON_LINK_IN_TREE 2
946 unsigned long tl_time;
947 atomic_t tl_count;
Steve French96daf2b2011-05-27 04:34:02 +0000948 struct cifs_tcon *tl_tcon;
Jeff Layton7ffec372010-09-29 19:51:11 -0400949};
950
Jeff Layton9d002df2010-10-06 19:51:11 -0400951extern struct tcon_link *cifs_sb_tlink(struct cifs_sb_info *cifs_sb);
Jeff Layton7ffec372010-09-29 19:51:11 -0400952
Steve French96daf2b2011-05-27 04:34:02 +0000953static inline struct cifs_tcon *
Jeff Layton7ffec372010-09-29 19:51:11 -0400954tlink_tcon(struct tcon_link *tlink)
955{
Jeff Layton9d002df2010-10-06 19:51:11 -0400956 return tlink->tl_tcon;
Jeff Layton7ffec372010-09-29 19:51:11 -0400957}
958
Jeff Layton9d002df2010-10-06 19:51:11 -0400959extern void cifs_put_tlink(struct tcon_link *tlink);
Jeff Layton7ffec372010-09-29 19:51:11 -0400960
Jeff Layton13cfb732010-09-29 19:51:11 -0400961static inline struct tcon_link *
962cifs_get_tlink(struct tcon_link *tlink)
963{
Jeff Layton9d002df2010-10-06 19:51:11 -0400964 if (tlink && !IS_ERR(tlink))
965 atomic_inc(&tlink->tl_count);
Jeff Layton13cfb732010-09-29 19:51:11 -0400966 return tlink;
967}
968
Jeff Layton7ffec372010-09-29 19:51:11 -0400969/* This function is always expected to succeed */
Steve French96daf2b2011-05-27 04:34:02 +0000970extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
Jeff Layton7ffec372010-09-29 19:51:11 -0400971
Pavel Shilovsky233839b2012-09-19 06:22:45 -0700972#define CIFS_OPLOCK_NO_CHANGE 0xfe
973
974struct cifs_pending_open {
975 struct list_head olist;
976 struct tcon_link *tlink;
977 __u8 lease_key[16];
978 __u32 oplock;
979};
980
Jeff Layton7ffec372010-09-29 19:51:11 -0400981/*
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000982 * This info hangs off the cifsFileInfo structure, pointed to by llist.
983 * This is used to track byte stream locks on the file
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 */
985struct cifsLockInfo {
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000986 struct list_head llist; /* pointer to next cifsLockInfo */
Pavel Shilovsky85160e02011-10-22 15:33:29 +0400987 struct list_head blist; /* pointer to locks blocked on this */
988 wait_queue_head_t block_q;
Jeremy Allison7ee1af72006-08-02 21:56:33 +0000989 __u64 offset;
990 __u64 length;
Pavel Shilovsky03776f42010-08-17 11:26:00 +0400991 __u32 pid;
Pavel Shilovsky04a6aa82012-02-28 14:16:55 +0300992 __u32 type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993};
994
995/*
996 * One of these for each open instance of a file
997 */
998struct cifs_search_info {
999 loff_t index_of_last_entry;
1000 __u16 entries_in_buffer;
1001 __u16 info_level;
1002 __u32 resume_key;
Steve Frenchd38d8c72007-06-28 19:44:13 +00001003 char *ntwrk_buf_start;
1004 char *srch_entries_start;
Steve French0752f152008-10-07 20:03:33 +00001005 char *last_entry;
Christoph Hellwigeaf35b12011-07-16 15:24:37 -04001006 const char *presume_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 unsigned int resume_name_len;
Steve French4b18f2a2008-04-29 00:06:05 +00001008 bool endOfSearch:1;
1009 bool emptyDir:1;
1010 bool unicode:1;
1011 bool smallBuf:1; /* so we know which buf_release function to call */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012};
1013
Pavel Shilovsky226730b2013-07-05 12:00:30 +04001014struct cifs_open_parms {
1015 struct cifs_tcon *tcon;
1016 struct cifs_sb_info *cifs_sb;
1017 int disposition;
1018 int desired_access;
1019 int create_options;
1020 const char *path;
1021 struct cifs_fid *fid;
Pavel Shilovsky9cbc0b72013-07-09 18:40:58 +04001022 bool reconnect:1;
Pavel Shilovsky226730b2013-07-05 12:00:30 +04001023};
1024
Pavel Shilovsky4b4de762012-09-18 16:20:26 -07001025struct cifs_fid {
1026 __u16 netfid;
Pavel Shilovskyf0df7372012-09-18 16:20:26 -07001027#ifdef CONFIG_CIFS_SMB2
1028 __u64 persistent_fid; /* persist file id for smb2 */
1029 __u64 volatile_fid; /* volatile file id for smb2 */
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001030 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for smb2 */
Steve Frenchb56eae42015-11-03 09:26:27 -06001031 __u8 create_guid[16];
Pavel Shilovskyf0df7372012-09-18 16:20:26 -07001032#endif
Pavel Shilovsky233839b2012-09-19 06:22:45 -07001033 struct cifs_pending_open *pending_open;
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001034 unsigned int epoch;
1035 bool purge_cache;
Pavel Shilovsky4b4de762012-09-18 16:20:26 -07001036};
1037
Pavel Shilovskyf45d3412012-09-19 06:22:43 -07001038struct cifs_fid_locks {
1039 struct list_head llist;
1040 struct cifsFileInfo *cfile; /* fid that owns locks */
1041 struct list_head locks; /* locks held by fid above */
1042};
1043
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044struct cifsFileInfo {
1045 struct list_head tlist; /* pointer to next fid owned by tcon */
1046 struct list_head flist; /* next fid (file instance) for this inode */
Pavel Shilovskyf45d3412012-09-19 06:22:43 -07001047 struct cifs_fid_locks *llist; /* brlocks held by this fid */
Eric W. Biedermanfef59fd2013-02-06 02:23:02 -08001048 kuid_t uid; /* allows finding which FileInfo structure */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 __u32 pid; /* process id who opened file */
Pavel Shilovsky4b4de762012-09-18 16:20:26 -07001050 struct cifs_fid fid; /* file id from remote */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 /* BB add lock scope info here if needed */ ;
1052 /* lock scope id (0 if none) */
Jeff Laytona5e18bc2010-10-11 15:07:18 -04001053 struct dentry *dentry;
Jeff Layton15886172010-10-15 15:33:59 -04001054 unsigned int f_flags;
Jeff Layton13cfb732010-09-29 19:51:11 -04001055 struct tcon_link *tlink;
Steve French4b18f2a2008-04-29 00:06:05 +00001056 bool invalidHandle:1; /* file closed via session abend */
Jeff Layton3bc303c2009-09-21 06:47:50 -04001057 bool oplock_break_cancelled:1;
Steve French6c0f6212010-10-23 16:51:40 +00001058 int count; /* refcount protected by cifs_file_list_lock */
Steve Frencha6ce4932009-04-09 01:14:32 +00001059 struct mutex fh_mutex; /* prevents reopen race after dead ses*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 struct cifs_search_info srch_inf;
Tejun Heo9b646972010-07-20 22:09:02 +02001061 struct work_struct oplock_break; /* work for oplock breaks */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062};
1063
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +04001064struct cifs_io_parms {
1065 __u16 netfid;
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001066#ifdef CONFIG_CIFS_SMB2
1067 __u64 persistent_fid; /* persist file id for smb2 */
1068 __u64 volatile_fid; /* volatile file id for smb2 */
1069#endif
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +04001070 __u32 pid;
1071 __u64 offset;
1072 unsigned int length;
Steve French96daf2b2011-05-27 04:34:02 +00001073 struct cifs_tcon *tcon;
Pavel Shilovskyfa2989f2011-05-26 10:01:59 +04001074};
1075
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001076struct cifs_readdata;
1077
1078/* asynchronous read support */
1079struct cifs_readdata {
1080 struct kref refcount;
1081 struct list_head list;
1082 struct completion done;
1083 struct cifsFileInfo *cfile;
1084 struct address_space *mapping;
1085 __u64 offset;
1086 unsigned int bytes;
Pavel Shilovsky34a54d62014-07-10 10:03:29 +04001087 unsigned int got_bytes;
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001088 pid_t pid;
1089 int result;
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001090 struct work_struct work;
Jeff Layton8321fec2012-09-19 06:22:32 -07001091 int (*read_into_pages)(struct TCP_Server_Info *server,
1092 struct cifs_readdata *rdata,
1093 unsigned int len);
Jeff Layton58195752012-09-19 06:22:34 -07001094 struct kvec iov;
Jeff Layton8321fec2012-09-19 06:22:32 -07001095 unsigned int pagesz;
1096 unsigned int tailsz;
Pavel Shilovskybed9da02014-06-25 11:28:57 +04001097 unsigned int credits;
Jeff Laytonc5fab6f2012-09-19 06:22:30 -07001098 unsigned int nr_pages;
1099 struct page *pages[];
Pavel Shilovsky09a47072012-09-18 16:20:29 -07001100};
1101
Pavel Shilovsky33319142012-09-18 16:20:29 -07001102struct cifs_writedata;
1103
1104/* asynchronous write support */
1105struct cifs_writedata {
1106 struct kref refcount;
1107 struct list_head list;
1108 struct completion done;
1109 enum writeback_sync_modes sync_mode;
1110 struct work_struct work;
1111 struct cifsFileInfo *cfile;
1112 __u64 offset;
1113 pid_t pid;
1114 unsigned int bytes;
1115 int result;
Jeff Laytoneddb0792012-09-18 16:20:35 -07001116 unsigned int pagesz;
1117 unsigned int tailsz;
Pavel Shilovskycb7e9ea2014-06-05 19:03:27 +04001118 unsigned int credits;
Pavel Shilovsky33319142012-09-18 16:20:29 -07001119 unsigned int nr_pages;
Jeff Layton26c8f0d2014-02-07 11:04:04 -05001120 struct page *pages[];
Pavel Shilovsky33319142012-09-18 16:20:29 -07001121};
1122
Jeff Layton5f6dbc92010-10-15 15:34:06 -04001123/*
1124 * Take a reference on the file private data. Must be called with
1125 * cifs_file_list_lock held.
1126 */
Jeff Layton764a1b12012-07-25 14:59:54 -04001127static inline void
1128cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
Dave Kleikamp6ab409b2009-08-31 11:07:12 -04001129{
Jeff Layton5f6dbc92010-10-15 15:34:06 -04001130 ++cifs_file->count;
Dave Kleikamp6ab409b2009-08-31 11:07:12 -04001131}
1132
Jeff Layton764a1b12012-07-25 14:59:54 -04001133struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
Jeff Laytonb33879a2010-10-15 15:34:04 -04001134void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
Dave Kleikamp6ab409b2009-08-31 11:07:12 -04001135
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001136#define CIFS_CACHE_READ_FLG 1
1137#define CIFS_CACHE_HANDLE_FLG 2
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001138#define CIFS_CACHE_RH_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_HANDLE_FLG)
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001139#define CIFS_CACHE_WRITE_FLG 4
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001140#define CIFS_CACHE_RW_FLG (CIFS_CACHE_READ_FLG | CIFS_CACHE_WRITE_FLG)
1141#define CIFS_CACHE_RHW_FLG (CIFS_CACHE_RW_FLG | CIFS_CACHE_HANDLE_FLG)
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001142
1143#define CIFS_CACHE_READ(cinode) (cinode->oplock & CIFS_CACHE_READ_FLG)
Pavel Shilovsky53ef1012013-09-05 16:11:28 +04001144#define CIFS_CACHE_HANDLE(cinode) (cinode->oplock & CIFS_CACHE_HANDLE_FLG)
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001145#define CIFS_CACHE_WRITE(cinode) (cinode->oplock & CIFS_CACHE_WRITE_FLG)
1146
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147/*
1148 * One of these for each file inode
1149 */
1150
1151struct cifsInodeInfo {
Pavel Shilovskyd59dad22011-09-22 09:53:59 +04001152 bool can_cache_brlcks;
Pavel Shilovskyf45d3412012-09-19 06:22:43 -07001153 struct list_head llist; /* locks helb by this inode */
Pavel Shilovsky1b4b55a2012-09-19 06:22:44 -07001154 struct rw_semaphore lock_sem; /* protect the fields above */
Steve Frenchd38d8c72007-06-28 19:44:13 +00001155 /* BB add in lists for dirty pages i.e. write caching info for oplock */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 struct list_head openFileList;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
Pavel Shilovsky18cceb62013-09-05 13:01:06 +04001158 unsigned int oplock; /* oplock/lease level we have */
Pavel Shilovsky42873b02013-09-05 21:30:16 +04001159 unsigned int epoch; /* used to track lease state changes */
Sachin Prabhuc11f1df2014-03-11 16:11:47 +00001160#define CIFS_INODE_PENDING_OPLOCK_BREAK (0) /* oplock break in progress */
1161#define CIFS_INODE_PENDING_WRITERS (1) /* Writes in progress */
1162#define CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2 (2) /* Downgrade oplock to L2 */
Jeff Laytonaff8d5c2014-04-30 09:31:45 -04001163#define CIFS_INO_DELETE_PENDING (3) /* delete pending on server */
1164#define CIFS_INO_INVALID_MAPPING (4) /* pagecache is invalid */
Jeff Layton4f73c7d2014-04-30 09:31:47 -04001165#define CIFS_INO_LOCK (5) /* lock bit for synchronization */
Jeff Laytonaff8d5c2014-04-30 09:31:45 -04001166 unsigned long flags;
Sachin Prabhuc11f1df2014-03-11 16:11:47 +00001167 spinlock_t writers_lock;
1168 unsigned int writers; /* Number of writers on this inode */
Jeff Laytonaae62fd2011-01-20 13:36:50 -05001169 unsigned long time; /* jiffies of last update of inode */
Jeff Layton597b0272012-03-23 14:40:56 -04001170 u64 server_eof; /* current file size on server -- protected by i_lock */
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001171 u64 uniqueid; /* server inode number */
Jeff Layton20054bd2011-01-07 11:30:27 -05001172 u64 createtime; /* creation time on server */
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001173#ifdef CONFIG_CIFS_SMB2
1174 __u8 lease_key[SMB2_LEASE_KEY_SIZE]; /* lease key for this inode */
1175#endif
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +05301176#ifdef CONFIG_CIFS_FSCACHE
1177 struct fscache_cookie *fscache;
1178#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 struct inode vfs_inode;
1180};
1181
1182static inline struct cifsInodeInfo *
1183CIFS_I(struct inode *inode)
1184{
1185 return container_of(inode, struct cifsInodeInfo, vfs_inode);
1186}
1187
1188static inline struct cifs_sb_info *
1189CIFS_SB(struct super_block *sb)
1190{
1191 return sb->s_fs_info;
1192}
1193
Al Viro7119e222014-10-22 00:25:12 -04001194static inline struct cifs_sb_info *
1195CIFS_FILE_SB(struct file *file)
1196{
1197 return CIFS_SB(file_inode(file)->i_sb);
1198}
1199
Steve Frenchab2f2182005-09-15 20:44:50 -07001200static inline char CIFS_DIR_SEP(const struct cifs_sb_info *cifs_sb)
Jeremy Allisonac670552005-06-22 17:26:35 -07001201{
1202 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
1203 return '/';
1204 else
1205 return '\\';
1206}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207
Steve Frenchf87d39d2011-05-27 03:50:55 +00001208static inline void
1209convert_delimiter(char *path, char delim)
1210{
Steve French1cc9bd62012-11-29 18:07:51 -06001211 char old_delim, *pos;
Steve Frenchf87d39d2011-05-27 03:50:55 +00001212
1213 if (delim == '/')
1214 old_delim = '\\';
1215 else
1216 old_delim = '/';
1217
Steve French1cc9bd62012-11-29 18:07:51 -06001218 pos = path;
1219 while ((pos = strchr(pos, old_delim)))
1220 *pos = delim;
Steve Frenchf87d39d2011-05-27 03:50:55 +00001221}
1222
Steve Frencha4544342005-08-24 13:59:35 -07001223#ifdef CONFIG_CIFS_STATS
1224#define cifs_stats_inc atomic_inc
1225
Steve French96daf2b2011-05-27 04:34:02 +00001226static inline void cifs_stats_bytes_written(struct cifs_tcon *tcon,
Steve Frencha4544342005-08-24 13:59:35 -07001227 unsigned int bytes)
1228{
1229 if (bytes) {
1230 spin_lock(&tcon->stat_lock);
1231 tcon->bytes_written += bytes;
1232 spin_unlock(&tcon->stat_lock);
1233 }
1234}
1235
Steve French96daf2b2011-05-27 04:34:02 +00001236static inline void cifs_stats_bytes_read(struct cifs_tcon *tcon,
Steve Frencha4544342005-08-24 13:59:35 -07001237 unsigned int bytes)
1238{
1239 spin_lock(&tcon->stat_lock);
1240 tcon->bytes_read += bytes;
1241 spin_unlock(&tcon->stat_lock);
1242}
1243#else
1244
Steve Frenchd38d8c72007-06-28 19:44:13 +00001245#define cifs_stats_inc(field) do {} while (0)
1246#define cifs_stats_bytes_written(tcon, bytes) do {} while (0)
1247#define cifs_stats_bytes_read(tcon, bytes) do {} while (0)
Steve Frencha4544342005-08-24 13:59:35 -07001248
1249#endif
1250
Jeff Layton2b84a36c2011-01-11 07:24:21 -05001251
1252/*
Jeff Layton44d22d82011-10-19 15:29:49 -04001253 * This is the prototype for the mid receive function. This function is for
1254 * receiving the rest of the SMB frame, starting with the WordCount (which is
1255 * just after the MID in struct smb_hdr). Note:
1256 *
1257 * - This will be called by cifsd, with no locks held.
1258 * - The mid will still be on the pending_mid_q.
1259 * - mid->resp_buf will point to the current buffer.
1260 *
1261 * Returns zero on a successful receive, or an error. The receive state in
1262 * the TCP_Server_Info will also be updated.
1263 */
1264typedef int (mid_receive_t)(struct TCP_Server_Info *server,
1265 struct mid_q_entry *mid);
1266
1267/*
1268 * This is the prototype for the mid callback function. This is called once the
1269 * mid has been received off of the socket. When creating one, take special
1270 * care to avoid deadlocks. Things to bear in mind:
Jeff Layton2b84a36c2011-01-11 07:24:21 -05001271 *
Jeff Layton3c1105d2011-05-22 07:09:13 -04001272 * - it will be called by cifsd, with no locks held
1273 * - the mid will be removed from any lists
Jeff Layton2b84a36c2011-01-11 07:24:21 -05001274 */
1275typedef void (mid_callback_t)(struct mid_q_entry *mid);
1276
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277/* one of these for every pending CIFS request to the server */
1278struct mid_q_entry {
1279 struct list_head qhead; /* mids waiting on reply from this server */
Pavel Shilovsky2dc7e1c2011-12-26 22:53:34 +04001280 struct TCP_Server_Info *server; /* server corresponding to this mid */
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -04001281 __u64 mid; /* multiplex id */
1282 __u32 pid; /* process id */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 __u32 sequence_number; /* for CIFS signing */
Steve French1047abc2005-10-11 19:58:06 -07001284 unsigned long when_alloc; /* when mid was created */
1285#ifdef CONFIG_CIFS_STATS2
1286 unsigned long when_sent; /* time when smb send finished */
1287 unsigned long when_received; /* when demux complete (taken off wire) */
1288#endif
Jeff Layton44d22d82011-10-19 15:29:49 -04001289 mid_receive_t *receive; /* call receive callback */
Jeff Layton2b84a36c2011-01-11 07:24:21 -05001290 mid_callback_t *callback; /* call completion callback */
1291 void *callback_data; /* general purpose pointer for callback */
Pavel Shilovskyd4e48542012-03-23 14:28:02 -04001292 void *resp_buf; /* pointer to received SMB header */
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -04001293 int mid_state; /* wish this were enum but can not pass to wait_event */
1294 __le16 command; /* smb command code */
1295 bool large_buf:1; /* if valid response, is pointer to large buf */
Steve French4b18f2a2008-04-29 00:06:05 +00001296 bool multiRsp:1; /* multiple trans2 responses for one request */
1297 bool multiEnd:1; /* both received */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298};
1299
Steve French789e6662011-08-09 18:44:44 +00001300/* Make code in transport.c a little cleaner by moving
1301 update of optional stats into function below */
1302#ifdef CONFIG_CIFS_STATS2
1303
1304static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1305{
1306 atomic_inc(&server->in_send);
1307}
1308
1309static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1310{
1311 atomic_dec(&server->in_send);
1312}
1313
1314static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1315{
1316 atomic_inc(&server->num_waiters);
1317}
1318
1319static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1320{
1321 atomic_dec(&server->num_waiters);
1322}
1323
1324static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1325{
1326 mid->when_sent = jiffies;
1327}
1328#else
1329static inline void cifs_in_send_inc(struct TCP_Server_Info *server)
1330{
1331}
1332static inline void cifs_in_send_dec(struct TCP_Server_Info *server)
1333{
1334}
1335
1336static inline void cifs_num_waiters_inc(struct TCP_Server_Info *server)
1337{
1338}
1339
1340static inline void cifs_num_waiters_dec(struct TCP_Server_Info *server)
1341{
1342}
1343
1344static inline void cifs_save_when_sent(struct mid_q_entry *mid)
1345{
1346}
1347#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348
Steve Frenchff5dbd92005-08-24 17:10:36 -07001349/* for pending dnotify requests */
1350struct dir_notify_req {
Steve French13cd4b72010-10-07 18:46:32 +00001351 struct list_head lhead;
1352 __le16 Pid;
1353 __le16 PidHigh;
1354 __u16 Mid;
1355 __u16 Tid;
1356 __u16 Uid;
1357 __u16 netfid;
1358 __u32 filter; /* CompletionFilter (for multishot) */
1359 int multishot;
1360 struct file *pfile;
Steve Frenchff5dbd92005-08-24 17:10:36 -07001361};
1362
Steve French366781c2008-01-25 10:12:41 +00001363struct dfs_info3_param {
1364 int flags; /* DFSREF_REFERRAL_SERVER, DFSREF_STORAGE_SERVER*/
Igor Mammedov8aad0182008-02-15 18:21:49 +00001365 int path_consumed;
Steve French366781c2008-01-25 10:12:41 +00001366 int server_type;
1367 int ref_flag;
1368 char *path_name;
1369 char *node_name;
1370};
1371
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001372/*
1373 * common struct for holding inode info when searching for or updating an
1374 * inode with new info
1375 */
1376
1377#define CIFS_FATTR_DFS_REFERRAL 0x1
Jeff Layton0b8f18e2009-07-09 01:46:37 -04001378#define CIFS_FATTR_DELETE_PENDING 0x2
1379#define CIFS_FATTR_NEED_REVAL 0x4
Jeff Layton3d694382010-05-11 14:59:55 -04001380#define CIFS_FATTR_INO_COLLISION 0x8
Jim McDonough74d290d2013-09-21 10:36:10 -05001381#define CIFS_FATTR_UNKNOWN_NLINK 0x10
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001382
1383struct cifs_fattr {
1384 u32 cf_flags;
1385 u32 cf_cifsattrs;
1386 u64 cf_uniqueid;
1387 u64 cf_eof;
1388 u64 cf_bytes;
Jeff Layton20054bd2011-01-07 11:30:27 -05001389 u64 cf_createtime;
Eric W. Biederman4a2c8cf2013-02-06 01:53:25 -08001390 kuid_t cf_uid;
1391 kgid_t cf_gid;
Jeff Laytoncc0bad72009-06-25 00:56:52 -04001392 umode_t cf_mode;
1393 dev_t cf_rdev;
1394 unsigned int cf_nlink;
1395 unsigned int cf_dtype;
1396 struct timespec cf_atime;
1397 struct timespec cf_mtime;
1398 struct timespec cf_ctime;
1399};
1400
Steve French366781c2008-01-25 10:12:41 +00001401static inline void free_dfs_info_param(struct dfs_info3_param *param)
1402{
1403 if (param) {
1404 kfree(param->path_name);
1405 kfree(param->node_name);
1406 kfree(param);
1407 }
1408}
1409
1410static inline void free_dfs_info_array(struct dfs_info3_param *param,
1411 int number_of_items)
1412{
1413 int i;
1414 if ((number_of_items == 0) || (param == NULL))
1415 return;
1416 for (i = 0; i < number_of_items; i++) {
1417 kfree(param[i].path_name);
1418 kfree(param[i].node_name);
1419 }
1420 kfree(param);
1421}
1422
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423#define MID_FREE 0
1424#define MID_REQUEST_ALLOCATED 1
1425#define MID_REQUEST_SUBMITTED 2
1426#define MID_RESPONSE_RECEIVED 4
1427#define MID_RETRY_NEEDED 8 /* session closed while this request out */
Jeff Layton71823ba2011-02-10 08:03:50 -05001428#define MID_RESPONSE_MALFORMED 0x10
Jeff Layton3c1105d2011-05-22 07:09:13 -04001429#define MID_SHUTDOWN 0x20
Steve Frenchec637e32005-12-12 20:53:18 -08001430
1431/* Types of response buffer returned from SendReceive2 */
1432#define CIFS_NO_BUFFER 0 /* Response buffer not returned */
1433#define CIFS_SMALL_BUFFER 1
1434#define CIFS_LARGE_BUFFER 2
1435#define CIFS_IOVEC 4 /* array of response buffers */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436
Steve French133672e2007-11-13 22:41:37 +00001437/* Type of Request to SendReceive2 */
Jeff Layton77499812011-01-11 07:24:23 -05001438#define CIFS_BLOCKING_OP 1 /* operation can block */
1439#define CIFS_ASYNC_OP 2 /* do not wait for response */
1440#define CIFS_TIMEOUT_MASK 0x003 /* only one of above set in req */
Steve French133672e2007-11-13 22:41:37 +00001441#define CIFS_LOG_ERROR 0x010 /* log NT STATUS if non-zero */
1442#define CIFS_LARGE_BUF_OP 0x020 /* large request buffer */
1443#define CIFS_NO_RESP 0x040 /* no response buffer required */
1444
Pavel Shilovskya891f0f2012-05-23 16:14:34 +04001445/* Type of request operation */
1446#define CIFS_ECHO_OP 0x080 /* echo request */
1447#define CIFS_OBREAK_OP 0x0100 /* oplock break request */
Pavel Shilovskyec2e4522011-12-27 16:12:43 +04001448#define CIFS_NEG_OP 0x0200 /* negotiate request */
1449#define CIFS_OP_MASK 0x0380 /* mask request type */
Pavel Shilovskycb7e9ea2014-06-05 19:03:27 +04001450#define CIFS_HAS_CREDITS 0x0400 /* already has credits */
Pavel Shilovskya891f0f2012-05-23 16:14:34 +04001451
Steve French39798772006-05-31 22:40:51 +00001452/* Security Flags: indicate type of session setup needed */
1453#define CIFSSEC_MAY_SIGN 0x00001
1454#define CIFSSEC_MAY_NTLM 0x00002
1455#define CIFSSEC_MAY_NTLMV2 0x00004
1456#define CIFSSEC_MAY_KRB5 0x00008
1457#ifdef CONFIG_CIFS_WEAK_PW_HASH
1458#define CIFSSEC_MAY_LANMAN 0x00010
1459#define CIFSSEC_MAY_PLNTXT 0x00020
Steve French516897a2007-10-12 19:24:06 +00001460#else
1461#define CIFSSEC_MAY_LANMAN 0
1462#define CIFSSEC_MAY_PLNTXT 0
Steve French39798772006-05-31 22:40:51 +00001463#endif /* weak passwords */
1464#define CIFSSEC_MAY_SEAL 0x00040 /* not supported yet */
Steve Frenchac683922009-05-06 04:16:04 +00001465#define CIFSSEC_MAY_NTLMSSP 0x00080 /* raw ntlmssp with ntlmv2 */
Steve French5815449d2006-02-14 01:36:20 +00001466
Steve French39798772006-05-31 22:40:51 +00001467#define CIFSSEC_MUST_SIGN 0x01001
1468/* note that only one of the following can be set so the
1469result of setting MUST flags more than once will be to
1470require use of the stronger protocol */
1471#define CIFSSEC_MUST_NTLM 0x02002
1472#define CIFSSEC_MUST_NTLMV2 0x04004
1473#define CIFSSEC_MUST_KRB5 0x08008
1474#ifdef CONFIG_CIFS_WEAK_PW_HASH
1475#define CIFSSEC_MUST_LANMAN 0x10010
1476#define CIFSSEC_MUST_PLNTXT 0x20020
Jeff Layton0d3a01f2007-10-16 17:32:19 +00001477#ifdef CONFIG_CIFS_UPCALL
Chuck Ebbert20d17522009-09-15 01:53:21 -04001478#define CIFSSEC_MASK 0xBF0BF /* allows weak security but also krb5 */
Steve Frenchd38d8c72007-06-28 19:44:13 +00001479#else
Chuck Ebbert20d17522009-09-15 01:53:21 -04001480#define CIFSSEC_MASK 0xB70B7 /* current flags supported if weak */
Steve French016ec752007-10-16 18:10:10 +00001481#endif /* UPCALL */
Jeff Layton0d3a01f2007-10-16 17:32:19 +00001482#else /* do not allow weak pw hash */
Steve French88a44122012-01-18 17:13:47 -06001483#define CIFSSEC_MUST_LANMAN 0
1484#define CIFSSEC_MUST_PLNTXT 0
Jeff Layton0d3a01f2007-10-16 17:32:19 +00001485#ifdef CONFIG_CIFS_UPCALL
Steve Frenchac683922009-05-06 04:16:04 +00001486#define CIFSSEC_MASK 0x8F08F /* flags supported if no weak allowed */
Jeff Layton0d3a01f2007-10-16 17:32:19 +00001487#else
Steve Frenchac683922009-05-06 04:16:04 +00001488#define CIFSSEC_MASK 0x87087 /* flags supported if no weak allowed */
Steve French016ec752007-10-16 18:10:10 +00001489#endif /* UPCALL */
Steve French39798772006-05-31 22:40:51 +00001490#endif /* WEAK_PW_HASH */
1491#define CIFSSEC_MUST_SEAL 0x40040 /* not supported yet */
Steve Frenchac683922009-05-06 04:16:04 +00001492#define CIFSSEC_MUST_NTLMSSP 0x80080 /* raw ntlmssp with ntlmv2 */
Steve French39798772006-05-31 22:40:51 +00001493
Jeff Layton896a8fc2013-05-26 07:01:01 -04001494#define CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
Shirish Pargaonkaref571ca2008-07-24 15:56:05 +00001495#define CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
Steve Frenchac683922009-05-06 04:16:04 +00001496#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 -07001497/*
1498 *****************************************************************
1499 * All constants go here
1500 *****************************************************************
1501 */
1502
1503#define UID_HASH (16)
1504
1505/*
1506 * Note that ONE module should define _DECLARE_GLOBALS_HERE to cause the
1507 * following to be declared.
1508 */
1509
1510/****************************************************************************
1511 * Locking notes. All updates to global variables and lists should be
1512 * protected by spinlocks or semaphores.
1513 *
1514 * Spinlocks
1515 * ---------
1516 * GlobalMid_Lock protects:
1517 * list operations on pending_mid_q and oplockQ
1518 * updates to XID counters, multiplex id and SMB sequence numbers
Suresh Jayaraman6573e9b2010-10-18 23:52:18 +05301519 * cifs_file_list_lock protects:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520 * list operations on tcp and SMB session lists and tCon lists
1521 * f_owner.lock protects certain per file struct operations
1522 * mapping->page_lock protects certain per page operations
1523 *
1524 * Semaphores
1525 * ----------
1526 * sesSem operations on smb session
1527 * tconSem operations on tree connection
Steve Frenchd38d8c72007-06-28 19:44:13 +00001528 * fh_sem file handle reconnection operations
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 *
1530 ****************************************************************************/
1531
1532#ifdef DECLARE_GLOBALS_HERE
1533#define GLOBAL_EXTERN
1534#else
1535#define GLOBAL_EXTERN extern
1536#endif
1537
Jeff Laytone7ddee92008-11-14 13:44:38 -05001538/*
1539 * the list of TCP_Server_Info structures, ie each of the sockets
Steve Frenchfb396012008-11-13 20:04:07 +00001540 * connecting our client to a distinct server (ip address), is
Jeff Laytone7ddee92008-11-14 13:44:38 -05001541 * chained together by cifs_tcp_ses_list. The list of all our SMB
Steve Frenchfb396012008-11-13 20:04:07 +00001542 * sessions (and from that the tree connections) can be found
Jeff Laytone7ddee92008-11-14 13:44:38 -05001543 * by iterating over cifs_tcp_ses_list
1544 */
1545GLOBAL_EXTERN struct list_head cifs_tcp_ses_list;
1546
Jeff Laytonf1987b42008-11-15 11:12:47 -05001547/*
1548 * This lock protects the cifs_tcp_ses_list, the list of smb sessions per
1549 * tcp session, and the list of tcon's per smb session. It also protects
1550 * the reference counters for the server, smb session, and tcon. Finally,
1551 * changes to the tcon->tidStatus should be done while holding this lock.
1552 */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301553GLOBAL_EXTERN spinlock_t cifs_tcp_ses_lock;
Steve Frenchddb4cbf2008-11-20 20:00:44 +00001554
1555/*
1556 * This lock protects the cifs_file->llist and cifs_file->flist
1557 * list operations, and updates to some flags (cifs_file->invalidHandle)
1558 * It will be moved to either use the tcon->stat_lock or equivalent later.
1559 * If cifs_tcp_ses_lock and the lock below are both needed to be held, then
1560 * the cifs_tcp_ses_lock must be grabbed first and released last.
1561 */
Jeff Layton44772882010-10-15 15:34:03 -04001562GLOBAL_EXTERN spinlock_t cifs_file_list_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563
Steve French0eff0e22011-02-24 05:39:23 +00001564#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
Steve French99ee4db2007-02-27 05:35:17 +00001565/* Outstanding dir notify requests */
1566GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
1567/* DirNotify response queue */
1568GLOBAL_EXTERN struct list_head GlobalDnotifyRsp_Q;
Steve French0eff0e22011-02-24 05:39:23 +00001569#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
Steve Frenchff5dbd92005-08-24 17:10:36 -07001570
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571/*
1572 * Global transaction id (XID) information
1573 */
1574GLOBAL_EXTERN unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +00001575GLOBAL_EXTERN unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576GLOBAL_EXTERN unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */
Steve French254e55e2006-06-04 05:53:15 +00001577GLOBAL_EXTERN spinlock_t GlobalMid_Lock; /* protects above & list operations */
1578 /* on midQ entries */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579/*
1580 * Global counters, updated atomically
1581 */
1582GLOBAL_EXTERN atomic_t sesInfoAllocCount;
1583GLOBAL_EXTERN atomic_t tconInfoAllocCount;
1584GLOBAL_EXTERN atomic_t tcpSesAllocCount;
1585GLOBAL_EXTERN atomic_t tcpSesReconnectCount;
1586GLOBAL_EXTERN atomic_t tconInfoReconnectCount;
1587
Steve Frenchaaa9bbe2008-05-23 17:38:32 +00001588/* Various Debug counters */
Steve French4498eed52005-12-03 13:58:57 -08001589GLOBAL_EXTERN atomic_t bufAllocCount; /* current number allocated */
1590#ifdef CONFIG_CIFS_STATS2
1591GLOBAL_EXTERN atomic_t totBufAllocCount; /* total allocated over all time */
1592GLOBAL_EXTERN atomic_t totSmBufAllocCount;
1593#endif
1594GLOBAL_EXTERN atomic_t smBufAllocCount;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595GLOBAL_EXTERN atomic_t midCount;
1596
1597/* Misc globals */
Jeff Layton5e500ed2012-05-16 07:13:17 -04001598GLOBAL_EXTERN bool enable_oplocks; /* enable or disable oplocks */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599GLOBAL_EXTERN unsigned int lookupCacheEnabled;
Jeff Layton04912d62010-04-24 07:57:45 -04001600GLOBAL_EXTERN unsigned int global_secflags; /* if on, session setup sent
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601 with more secure ntlmssp2 challenge/resp */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602GLOBAL_EXTERN unsigned int sign_CIFS_PDUs; /* enable smb packet signing */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603GLOBAL_EXTERN unsigned int linuxExtEnabled;/*enable Linux/Unix CIFS extensions*/
1604GLOBAL_EXTERN unsigned int CIFSMaxBufSize; /* max size not including hdr */
1605GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
1606GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
1607GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
1608
Shirish Pargaonkar21fed0d2011-08-09 14:30:48 -05001609#ifdef CONFIG_CIFS_ACL
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001610GLOBAL_EXTERN struct rb_root uidtree;
1611GLOBAL_EXTERN struct rb_root gidtree;
1612GLOBAL_EXTERN spinlock_t siduidlock;
1613GLOBAL_EXTERN spinlock_t sidgidlock;
Shirish Pargaonkar21fed0d2011-08-09 14:30:48 -05001614GLOBAL_EXTERN struct rb_root siduidtree;
1615GLOBAL_EXTERN struct rb_root sidgidtree;
1616GLOBAL_EXTERN spinlock_t uidsidlock;
1617GLOBAL_EXTERN spinlock_t gidsidlock;
1618#endif /* CONFIG_CIFS_ACL */
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001619
Tejun Heo9b646972010-07-20 22:09:02 +02001620void cifs_oplock_break(struct work_struct *work);
Linus Torvalds3b7433b2010-08-07 12:42:58 -07001621
Jeff Layton3bc303c2009-09-21 06:47:50 -04001622extern const struct slow_work_ops cifs_oplock_break_ops;
Jeff Laytonda472fc2012-03-23 14:40:53 -04001623extern struct workqueue_struct *cifsiod_wq;
Suresh Jayaramanabd2e442010-06-22 20:52:50 +05301624
Pavel Shilovsky2dc7e1c2011-12-26 22:53:34 +04001625extern mempool_t *cifs_mid_poolp;
1626
Jeff Layton23db65f2012-05-15 12:20:51 -04001627/* Operations for different SMB versions */
1628#define SMB1_VERSION_STRING "1.0"
1629extern struct smb_version_operations smb1_operations;
1630extern struct smb_version_values smb1_values;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001631#define SMB20_VERSION_STRING "2.0"
Pavel Shilovsky53ef1012013-09-05 16:11:28 +04001632extern struct smb_version_operations smb20_operations;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001633extern struct smb_version_values smb20_values;
Steve French1080ef72011-02-24 18:07:19 +00001634#define SMB21_VERSION_STRING "2.1"
1635extern struct smb_version_operations smb21_operations;
1636extern struct smb_version_values smb21_values;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001637#define SMB30_VERSION_STRING "3.0"
Steve French38107d42012-12-08 22:08:06 -06001638extern struct smb_version_operations smb30_operations;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001639extern struct smb_version_values smb30_values;
Steve French20b6d8b2013-06-12 22:48:41 -05001640#define SMB302_VERSION_STRING "3.02"
1641/*extern struct smb_version_operations smb302_operations;*/ /* not needed yet */
1642extern struct smb_version_values smb302_values;
Steve French5f7fbf72014-12-17 22:52:58 -06001643#define SMB311_VERSION_STRING "3.1.1"
Steve Frenchaab18932015-06-23 23:37:11 -05001644#define ALT_SMB311_VERSION_STRING "3.11"
1645extern struct smb_version_operations smb311_operations;
Steve French5f7fbf72014-12-17 22:52:58 -06001646extern struct smb_version_values smb311_values;
Suresh Jayaramanabd2e442010-06-22 20:52:50 +05301647#endif /* _CIFS_GLOB_H */