blob: f718d5780062a2b94ac46c75ca0a73d9d162c43a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/cifsfs.c
3 *
Steve French2b280fa2008-05-17 03:12:45 +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)
6 *
7 * Common Internet FileSystem (CIFS) client
8 *
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24/* Note that BB means BUGBUG (ie something to fix eventually) */
25
26#include <linux/module.h>
27#include <linux/fs.h>
28#include <linux/mount.h>
29#include <linux/slab.h>
30#include <linux/init.h>
31#include <linux/list.h>
32#include <linux/seq_file.h>
33#include <linux/vfs.h>
34#include <linux/mempool.h>
Steve French6ab16d22005-11-29 20:55:11 -080035#include <linux/delay.h>
Steve French45af7a02006-04-21 22:52:25 +000036#include <linux/kthread.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080037#include <linux/freezer.h>
Al Virofec11dd2011-07-18 13:50:40 -040038#include <linux/namei.h>
Ben Greear3eb9a882010-09-01 17:06:02 -070039#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include "cifsfs.h"
41#include "cifspdu.h"
42#define DECLARE_GLOBALS_HERE
43#include "cifsglob.h"
44#include "cifsproto.h"
45#include "cifs_debug.h"
46#include "cifs_fs_sb.h"
47#include <linux/mm.h>
Jeff Layton84a15b92007-11-03 05:02:24 +000048#include <linux/key-type.h>
Jeff Laytone5459372007-11-03 05:11:06 +000049#include "cifs_spnego.h"
Suresh Jayaramanf579cf32010-07-05 18:11:50 +053050#include "fscache.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053int cifsFYI = 0;
54int cifsERROR = 1;
55int traceSMB = 0;
Steve Frenche7504732011-10-12 17:47:03 -050056bool enable_oplocks = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057unsigned int linuxExtEnabled = 1;
58unsigned int lookupCacheEnabled = 1;
Jeff Layton04912d62010-04-24 07:57:45 -040059unsigned int global_secflags = CIFSSEC_DEF;
Steve French39798772006-05-31 22:40:51 +000060/* unsigned int ntlmv2_support = 0; */
Linus Torvalds1da177e2005-04-16 15:20:36 -070061unsigned int sign_CIFS_PDUs = 1;
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -080062static const struct super_operations cifs_super_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
64module_param(CIFSMaxBufSize, int, 0);
Steve French63135e02007-07-17 17:34:02 +000065MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
66 "Default: 16384 Range: 8192 to 130048");
Linus Torvalds1da177e2005-04-16 15:20:36 -070067unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
68module_param(cifs_min_rcv, int, 0);
Steve French63135e02007-07-17 17:34:02 +000069MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
70 "1 to 64");
Linus Torvalds1da177e2005-04-16 15:20:36 -070071unsigned int cifs_min_small = 30;
72module_param(cifs_min_small, int, 0);
Steve French63135e02007-07-17 17:34:02 +000073MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
74 "Range: 2 to 256");
Linus Torvalds1da177e2005-04-16 15:20:36 -070075unsigned int cifs_max_pending = CIFS_MAX_REQ;
Jeff Laytonfef33df2011-10-19 15:30:37 -040076module_param(cifs_max_pending, int, 0444);
Steve French63135e02007-07-17 17:34:02 +000077MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
Pavel Shilovsky10b9b982012-03-20 12:55:09 +030078 "Default: 32767 Range: 2 to 32767.");
Steve Frenche7504732011-10-12 17:47:03 -050079module_param(enable_oplocks, bool, 0644);
80MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:"
81 "y/Y/1");
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083extern mempool_t *cifs_sm_req_poolp;
84extern mempool_t *cifs_req_poolp;
85extern mempool_t *cifs_mid_poolp;
86
Jeff Laytonda472fc2012-03-23 14:40:53 -040087struct workqueue_struct *cifsiod_wq;
88
Linus Torvalds1da177e2005-04-16 15:20:36 -070089static int
Al Viro97d11522011-06-17 09:29:57 -040090cifs_read_super(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070091{
92 struct inode *inode;
Pavel Shilovskyb2e5cd32011-05-25 13:35:34 +040093 struct cifs_sb_info *cifs_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 int rc = 0;
Steve French50c2f752007-07-13 00:33:32 +000095
Pavel Shilovskyb2e5cd32011-05-25 13:35:34 +040096 cifs_sb = CIFS_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
Al Viro2c6292a2011-06-17 09:05:48 -040098 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
99 sb->s_flags |= MS_POSIXACL;
100
101 if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES)
102 sb->s_maxbytes = MAX_LFS_FILESIZE;
103 else
104 sb->s_maxbytes = MAX_NON_LFS;
105
106 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
107 sb->s_time_gran = 100;
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 sb->s_magic = CIFS_MAGIC_NUMBER;
110 sb->s_op = &cifs_super_ops;
Jens Axboe8044f7f2010-04-22 12:09:48 +0200111 sb->s_bdi = &cifs_sb->bdi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 sb->s_blocksize = CIFS_MAX_MSGSIZE;
113 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
Shirish Pargaonkar9b6763e2011-02-21 23:56:59 -0600114 inode = cifs_root_iget(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
David Howellsce634ab2008-02-07 00:15:33 -0800116 if (IS_ERR(inode)) {
117 rc = PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 goto out_no_root;
119 }
120
Al Viro48fde702012-01-08 22:15:13 -0500121 sb->s_root = d_make_root(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 if (!sb->s_root) {
123 rc = -ENOMEM;
124 goto out_no_root;
125 }
Steve French50c2f752007-07-13 00:33:32 +0000126
Al Viro1c929cf2010-12-18 11:43:51 -0500127 /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */
128 if (cifs_sb_master_tcon(cifs_sb)->nocase)
129 sb->s_d_op = &cifs_ci_dentry_ops;
130 else
131 sb->s_d_op = &cifs_dentry_ops;
132
Paul Bollef3a6a602011-10-12 14:14:04 +0200133#ifdef CONFIG_CIFS_NFSD_EXPORT
Steve French7521a3c2007-07-11 18:30:34 +0000134 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000135 cFYI(1, "export ops supported");
Steve French7521a3c2007-07-11 18:30:34 +0000136 sb->s_export_op = &cifs_export_ops;
137 }
Paul Bollef3a6a602011-10-12 14:14:04 +0200138#endif /* CONFIG_CIFS_NFSD_EXPORT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140 return 0;
141
142out_no_root:
Joe Perchesb6b38f72010-04-21 03:50:45 +0000143 cERROR(1, "cifs_read_super: get root inode failed");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 return rc;
145}
146
Al Viro6d686172011-06-17 08:34:57 -0400147static void cifs_kill_sb(struct super_block *sb)
148{
149 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
150 kill_anon_super(sb);
Al Viro98ab4942011-06-17 09:32:10 -0400151 cifs_umount(cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152}
153
154static int
David Howells726c3342006-06-23 02:02:58 -0700155cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156{
David Howells726c3342006-06-23 02:02:58 -0700157 struct super_block *sb = dentry->d_sb;
Steve French39da9842008-04-28 04:04:34 +0000158 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French96daf2b2011-05-27 04:34:02 +0000159 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
Steve Frenchc81156d2005-04-28 22:41:07 -0700160 int rc = -EOPNOTSUPP;
Steve French39da9842008-04-28 04:04:34 +0000161 int xid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163 xid = GetXid();
164
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 buf->f_type = CIFS_MAGIC_NUMBER;
166
Steve French39da9842008-04-28 04:04:34 +0000167 /*
168 * PATH_MAX may be too long - it would presumably be total path,
169 * but note that some servers (includinng Samba 3) have a shorter
170 * maximum path.
171 *
172 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
173 */
174 buf->f_namelen = PATH_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 buf->f_files = 0; /* undefined */
176 buf->f_ffree = 0; /* unlimited */
177
Steve French39da9842008-04-28 04:04:34 +0000178 /*
179 * We could add a second check for a QFS Unix capability bit
180 */
181 if ((tcon->ses->capabilities & CAP_UNIX) &&
182 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
183 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
Steve French39da9842008-04-28 04:04:34 +0000185 /*
186 * Only need to call the old QFSInfo if failed on newer one,
187 * e.g. by OS/2.
188 **/
189 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
190 rc = CIFSSMBQFSInfo(xid, tcon, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Steve French39da9842008-04-28 04:04:34 +0000192 /*
193 * Some old Windows servers also do not support level 103, retry with
194 * older level one if old server failed the previous call or we
195 * bypassed it because we detected that this was an older LANMAN sess
196 */
Steve French4523cc32007-04-30 20:13:06 +0000197 if (rc)
Steve French39da9842008-04-28 04:04:34 +0000198 rc = SMBOldQFSInfo(xid, tcon, buf);
199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 FreeXid(xid);
Steve French39da9842008-04-28 04:04:34 +0000201 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202}
203
Al Viro10556cb2011-06-20 19:28:19 -0400204static int cifs_permission(struct inode *inode, int mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205{
206 struct cifs_sb_info *cifs_sb;
207
208 cifs_sb = CIFS_SB(inode->i_sb);
209
Miklos Szeredif696a362008-07-31 13:41:58 +0200210 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
211 if ((mask & MAY_EXEC) && !execute_ok(inode))
212 return -EACCES;
213 else
214 return 0;
215 } else /* file mode might have been restricted at mount time
Steve French50c2f752007-07-13 00:33:32 +0000216 on the client (above and beyond ACL on servers) for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 servers which do not support setting and viewing mode bits,
Steve French50c2f752007-07-13 00:33:32 +0000218 so allowing client to check permissions is useful */
Al Viro2830ba72011-06-20 19:16:29 -0400219 return generic_permission(inode, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220}
221
Christoph Lametere18b8902006-12-06 20:33:20 -0800222static struct kmem_cache *cifs_inode_cachep;
223static struct kmem_cache *cifs_req_cachep;
224static struct kmem_cache *cifs_mid_cachep;
Christoph Lametere18b8902006-12-06 20:33:20 -0800225static struct kmem_cache *cifs_sm_req_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226mempool_t *cifs_sm_req_poolp;
227mempool_t *cifs_req_poolp;
228mempool_t *cifs_mid_poolp;
229
230static struct inode *
231cifs_alloc_inode(struct super_block *sb)
232{
233 struct cifsInodeInfo *cifs_inode;
Christoph Lametere94b1762006-12-06 20:33:17 -0800234 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 if (!cifs_inode)
236 return NULL;
237 cifs_inode->cifsAttrs = 0x20; /* default */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 cifs_inode->time = 0;
239 /* Until the file is open and we have gotten oplock
240 info back from the server, can not assume caching of
241 file data or metadata */
Pavel Shilovskyc6723622010-11-03 10:58:57 +0300242 cifs_set_oplock_level(cifs_inode, 0);
Jeff Layton9a8165f2008-10-17 21:03:20 -0400243 cifs_inode->delete_pending = false;
Jeff Laytondf2cf172010-02-12 07:44:16 -0500244 cifs_inode->invalid_mapping = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
Jeff Laytonfbec9ab2009-04-03 13:44:00 -0400246 cifs_inode->server_eof = 0;
Jeff Layton20054bd2011-01-07 11:30:27 -0500247 cifs_inode->uniqueid = 0;
248 cifs_inode->createtime = 0;
Steve French50c2f752007-07-13 00:33:32 +0000249
Steve French1b2b2122007-02-17 04:30:54 +0000250 /* Can not set i_flags here - they get immediately overwritten
251 to zero by the VFS */
252/* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 INIT_LIST_HEAD(&cifs_inode->openFileList);
254 return &cifs_inode->vfs_inode;
255}
256
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100257static void cifs_i_callback(struct rcu_head *head)
258{
259 struct inode *inode = container_of(head, struct inode, i_rcu);
260 INIT_LIST_HEAD(&inode->i_dentry);
261 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
262}
263
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264static void
265cifs_destroy_inode(struct inode *inode)
266{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100267 call_rcu(&inode->i_rcu, cifs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268}
269
Jeff Layton61f98ff2009-06-11 10:27:32 -0400270static void
Al Virob57922d2010-06-07 14:34:48 -0400271cifs_evict_inode(struct inode *inode)
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530272{
Al Virob57922d2010-06-07 14:34:48 -0400273 truncate_inode_pages(&inode->i_data, 0);
274 end_writeback(inode);
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530275 cifs_fscache_release_inode_cookie(inode);
276}
277
278static void
Jeff Layton61f98ff2009-06-11 10:27:32 -0400279cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
280{
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300281 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
282 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
283
Jeff Layton61f98ff2009-06-11 10:27:32 -0400284 seq_printf(s, ",addr=");
285
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300286 switch (server->dstaddr.ss_family) {
Jeff Layton61f98ff2009-06-11 10:27:32 -0400287 case AF_INET:
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300288 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
Jeff Layton61f98ff2009-06-11 10:27:32 -0400289 break;
290 case AF_INET6:
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300291 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
292 if (sa6->sin6_scope_id)
293 seq_printf(s, "%%%u", sa6->sin6_scope_id);
Jeff Layton61f98ff2009-06-11 10:27:32 -0400294 break;
295 default:
296 seq_printf(s, "(unknown)");
297 }
298}
299
Jeff Layton3e715512011-06-13 11:50:41 -0400300static void
301cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server)
302{
303 seq_printf(s, ",sec=");
304
305 switch (server->secType) {
306 case LANMAN:
307 seq_printf(s, "lanman");
308 break;
309 case NTLMv2:
310 seq_printf(s, "ntlmv2");
311 break;
312 case NTLM:
313 seq_printf(s, "ntlm");
314 break;
315 case Kerberos:
316 seq_printf(s, "krb5");
317 break;
318 case RawNTLMSSP:
319 seq_printf(s, "ntlmssp");
320 break;
321 default:
322 /* shouldn't ever happen */
323 seq_printf(s, "unknown");
324 break;
325 }
326
327 if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
328 seq_printf(s, "i");
329}
330
Jeff Laytond06b5052012-05-16 07:53:01 -0400331static void
332cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
333{
334 seq_printf(s, ",cache=");
335
336 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
337 seq_printf(s, "strict");
338 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
339 seq_printf(s, "none");
340 else
341 seq_printf(s, "loose");
342}
343
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344/*
345 * cifs_show_options() is for displaying mount options in /proc/mounts.
346 * Not all settable options are displayed but most of the important
347 * ones are.
348 */
349static int
Al Viro34c80b12011-12-08 21:32:45 -0500350cifs_show_options(struct seq_file *s, struct dentry *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351{
Al Viro34c80b12011-12-08 21:32:45 -0500352 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
Steve French96daf2b2011-05-27 04:34:02 +0000353 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
Ben Greear3eb9a882010-09-01 17:06:02 -0700354 struct sockaddr *srcaddr;
355 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
Jeff Layton3e715512011-06-13 11:50:41 -0400357 cifs_show_security(s, tcon->ses->server);
Jeff Laytond06b5052012-05-16 07:53:01 -0400358 cifs_show_cache_flavor(s, cifs_sb);
Jeff Layton3e715512011-06-13 11:50:41 -0400359
Jeff Layton8e047d02009-08-28 10:11:10 -0400360 seq_printf(s, ",unc=%s", tcon->treeName);
Jeff Layton29e07c82010-09-29 19:51:12 -0400361
362 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
363 seq_printf(s, ",multiuser");
Steve French8727c8a2011-02-25 01:11:56 -0600364 else if (tcon->ses->user_name)
365 seq_printf(s, ",username=%s", tcon->ses->user_name);
Jeff Layton29e07c82010-09-29 19:51:12 -0400366
Jeff Layton8616e0f2009-06-11 10:27:28 -0400367 if (tcon->ses->domainName)
368 seq_printf(s, ",domain=%s", tcon->ses->domainName);
369
Ben Greear3eb9a882010-09-01 17:06:02 -0700370 if (srcaddr->sa_family != AF_UNSPEC) {
371 struct sockaddr_in *saddr4;
372 struct sockaddr_in6 *saddr6;
373 saddr4 = (struct sockaddr_in *)srcaddr;
374 saddr6 = (struct sockaddr_in6 *)srcaddr;
375 if (srcaddr->sa_family == AF_INET6)
376 seq_printf(s, ",srcaddr=%pI6c",
377 &saddr6->sin6_addr);
378 else if (srcaddr->sa_family == AF_INET)
379 seq_printf(s, ",srcaddr=%pI4",
380 &saddr4->sin_addr.s_addr);
381 else
382 seq_printf(s, ",srcaddr=BAD-AF:%i",
383 (int)(srcaddr->sa_family));
384 }
385
Sachin Prabhu28f88812012-04-24 15:28:30 +0100386 seq_printf(s, ",uid=%u", cifs_sb->mnt_uid);
Jeff Layton340481a32009-06-11 10:27:29 -0400387 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
388 seq_printf(s, ",forceuid");
Jeff Layton4486d6e2009-08-03 12:45:10 -0400389 else
390 seq_printf(s, ",noforceuid");
Jeff Layton340481a32009-06-11 10:27:29 -0400391
Sachin Prabhu28f88812012-04-24 15:28:30 +0100392 seq_printf(s, ",gid=%u", cifs_sb->mnt_gid);
Jeff Layton340481a32009-06-11 10:27:29 -0400393 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
394 seq_printf(s, ",forcegid");
Jeff Layton4486d6e2009-08-03 12:45:10 -0400395 else
396 seq_printf(s, ",noforcegid");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400397
Jeff Layton61f98ff2009-06-11 10:27:32 -0400398 cifs_show_address(s, tcon->ses->server);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400399
400 if (!tcon->unix_ext)
Al Viro5206efd2011-07-26 03:22:14 -0400401 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
Steve French2b280fa2008-05-17 03:12:45 +0000402 cifs_sb->mnt_file_mode,
403 cifs_sb->mnt_dir_mode);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400404 if (tcon->seal)
405 seq_printf(s, ",seal");
406 if (tcon->nocase)
407 seq_printf(s, ",nocase");
408 if (tcon->retry)
409 seq_printf(s, ",hard");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000410 if (tcon->unix_ext)
411 seq_printf(s, ",unix");
412 else
413 seq_printf(s, ",nounix");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400414 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
415 seq_printf(s, ",posixpaths");
416 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
417 seq_printf(s, ",setuids");
418 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
419 seq_printf(s, ",serverino");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000420 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
421 seq_printf(s, ",rwpidforward");
422 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
423 seq_printf(s, ",forcemand");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400424 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
425 seq_printf(s, ",nouser_xattr");
426 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
427 seq_printf(s, ",mapchars");
428 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
429 seq_printf(s, ",sfu");
430 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
431 seq_printf(s, ",nobrl");
432 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
433 seq_printf(s, ",cifsacl");
434 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
435 seq_printf(s, ",dynperm");
Al Viro34c80b12011-12-08 21:32:45 -0500436 if (root->d_sb->s_flags & MS_POSIXACL)
Jeff Layton8616e0f2009-06-11 10:27:28 -0400437 seq_printf(s, ",acl");
Stefan Metzmacher736a3322010-07-30 14:56:00 +0200438 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
439 seq_printf(s, ",mfsymlinks");
Suresh Jayaraman476428f2010-11-24 17:49:07 +0530440 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
441 seq_printf(s, ",fsc");
Steve French71c424b2011-10-19 20:44:48 -0500442 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
443 seq_printf(s, ",nostrictsync");
444 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
445 seq_printf(s, ",noperm");
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +0100446 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
447 seq_printf(s, ",backupuid=%u", cifs_sb->mnt_backupuid);
448 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
449 seq_printf(s, ",backupgid=%u", cifs_sb->mnt_backupgid);
Steve French2b280fa2008-05-17 03:12:45 +0000450
Sachin Prabhu28f88812012-04-24 15:28:30 +0100451 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
452 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
Suresh Jayaraman6d20e842010-12-01 14:42:28 +0530453 /* convert actimeo and display it in seconds */
Sachin Prabhu156d1792012-04-25 12:10:14 +0100454 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 return 0;
457}
458
Al Viro42faad92008-04-24 07:21:56 -0400459static void cifs_umount_begin(struct super_block *sb)
Steve French68058e72005-10-10 10:34:22 -0700460{
Al Viro42faad92008-04-24 07:21:56 -0400461 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French96daf2b2011-05-27 04:34:02 +0000462 struct cifs_tcon *tcon;
Steve French68058e72005-10-10 10:34:22 -0700463
Steve French4523cc32007-04-30 20:13:06 +0000464 if (cifs_sb == NULL)
Steve French9e2e85f2005-10-10 14:28:38 -0700465 return;
466
Jeff Layton0d424ad2010-09-20 16:01:35 -0700467 tcon = cifs_sb_master_tcon(cifs_sb);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500468
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530469 spin_lock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000470 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
471 /* we have other mounts to same share or we have
472 already tried to force umount this and woken up
473 all waiting network requests, nothing to do */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530474 spin_unlock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000475 return;
476 } else if (tcon->tc_count == 1)
Steve French5e1253b2005-10-10 14:06:37 -0700477 tcon->tidStatus = CifsExiting;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530478 spin_unlock(&cifs_tcp_ses_lock);
Steve French5e1253b2005-10-10 14:06:37 -0700479
Steve French3a5ff612006-07-14 22:37:11 +0000480 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
Steve French7b7abfe2005-11-09 15:21:09 -0800481 /* cancel_notify_requests(tcon); */
Steve French50c2f752007-07-13 00:33:32 +0000482 if (tcon->ses && tcon->ses->server) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000483 cFYI(1, "wake up tasks now - umount begin not complete");
Steve French9e2e85f2005-10-10 14:28:38 -0700484 wake_up_all(&tcon->ses->server->request_q);
Steve French6ab16d22005-11-29 20:55:11 -0800485 wake_up_all(&tcon->ses->server->response_q);
486 msleep(1); /* yield */
487 /* we have to kick the requests once more */
488 wake_up_all(&tcon->ses->server->response_q);
489 msleep(1);
Steve French5e1253b2005-10-10 14:06:37 -0700490 }
Steve French68058e72005-10-10 10:34:22 -0700491
492 return;
493}
Steve French68058e72005-10-10 10:34:22 -0700494
Steve Frenchbf97d282006-09-28 21:34:06 +0000495#ifdef CONFIG_CIFS_STATS2
Al Viro64132372011-12-08 20:51:13 -0500496static int cifs_show_stats(struct seq_file *s, struct dentry *root)
Steve Frenchbf97d282006-09-28 21:34:06 +0000497{
498 /* BB FIXME */
499 return 0;
500}
501#endif
502
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503static int cifs_remount(struct super_block *sb, int *flags, char *data)
504{
505 *flags |= MS_NODIRATIME;
506 return 0;
507}
508
Al Viro45321ac2010-06-07 13:43:19 -0400509static int cifs_drop_inode(struct inode *inode)
Jeff Layton12420ac2010-06-01 14:47:40 -0400510{
511 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
512
Al Viro45321ac2010-06-07 13:43:19 -0400513 /* no serverino => unconditional eviction */
514 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
515 generic_drop_inode(inode);
Jeff Layton12420ac2010-06-01 14:47:40 -0400516}
517
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800518static const struct super_operations cifs_super_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 .statfs = cifs_statfs,
520 .alloc_inode = cifs_alloc_inode,
521 .destroy_inode = cifs_destroy_inode,
Jeff Layton12420ac2010-06-01 14:47:40 -0400522 .drop_inode = cifs_drop_inode,
Al Virob57922d2010-06-07 14:34:48 -0400523 .evict_inode = cifs_evict_inode,
Jeff Layton12420ac2010-06-01 14:47:40 -0400524/* .delete_inode = cifs_delete_inode, */ /* Do not need above
525 function unless later we add lazy close of inodes or unless the
Steve French50c2f752007-07-13 00:33:32 +0000526 kernel forgets to call us with the same number of releases (closes)
527 as opens */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 .show_options = cifs_show_options,
Steve French7b7abfe2005-11-09 15:21:09 -0800529 .umount_begin = cifs_umount_begin,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 .remount_fs = cifs_remount,
Steve Frenchbf97d282006-09-28 21:34:06 +0000531#ifdef CONFIG_CIFS_STATS2
Steve Frenchf46d3e12006-09-30 01:08:55 +0000532 .show_stats = cifs_show_stats,
Steve Frenchbf97d282006-09-28 21:34:06 +0000533#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534};
535
Steve Frenchf87d39d2011-05-27 03:50:55 +0000536/*
537 * Get root dentry from superblock according to prefix path mount option.
538 * Return dentry with refcount + 1 on success and NULL otherwise.
539 */
540static struct dentry *
541cifs_get_root(struct smb_vol *vol, struct super_block *sb)
542{
Al Virofec11dd2011-07-18 13:50:40 -0400543 struct dentry *dentry;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000544 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Al Virofec11dd2011-07-18 13:50:40 -0400545 char *full_path = NULL;
546 char *s, *p;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000547 char sep;
548
549 full_path = cifs_build_path_to_root(vol, cifs_sb,
550 cifs_sb_master_tcon(cifs_sb));
551 if (full_path == NULL)
Al Viro9403c9c2011-06-17 10:02:59 -0400552 return ERR_PTR(-ENOMEM);
Steve Frenchf87d39d2011-05-27 03:50:55 +0000553
554 cFYI(1, "Get root dentry for %s", full_path);
555
Steve Frenchf87d39d2011-05-27 03:50:55 +0000556 sep = CIFS_DIR_SEP(cifs_sb);
Al Virofec11dd2011-07-18 13:50:40 -0400557 dentry = dget(sb->s_root);
558 p = s = full_path;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000559
Al Virofec11dd2011-07-18 13:50:40 -0400560 do {
561 struct inode *dir = dentry->d_inode;
562 struct dentry *child;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000563
Pavel Shilovsky5b980b02011-08-21 19:30:15 +0400564 if (!dir) {
565 dput(dentry);
566 dentry = ERR_PTR(-ENOENT);
567 break;
568 }
569
Al Virofec11dd2011-07-18 13:50:40 -0400570 /* skip separators */
571 while (*s == sep)
572 s++;
573 if (!*s)
574 break;
575 p = s++;
576 /* next separator */
577 while (*s && *s != sep)
578 s++;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000579
Al Virofec11dd2011-07-18 13:50:40 -0400580 mutex_lock(&dir->i_mutex);
581 child = lookup_one_len(p, dentry, s - p);
582 mutex_unlock(&dir->i_mutex);
583 dput(dentry);
584 dentry = child;
585 } while (!IS_ERR(dentry));
Steve Frenchf87d39d2011-05-27 03:50:55 +0000586 kfree(full_path);
Al Virofec11dd2011-07-18 13:50:40 -0400587 return dentry;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000588}
589
Al Viroee01a142011-06-17 09:47:23 -0400590static int cifs_set_super(struct super_block *sb, void *data)
591{
592 struct cifs_mnt_data *mnt_data = data;
593 sb->s_fs_info = mnt_data->cifs_sb;
594 return set_anon_super(sb, NULL);
595}
596
Al Virod753ed92010-07-26 12:52:33 +0400597static struct dentry *
598cifs_do_mount(struct file_system_type *fs_type,
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000599 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600{
601 int rc;
Jan Blunckdb719222010-08-15 22:51:10 +0200602 struct super_block *sb;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000603 struct cifs_sb_info *cifs_sb;
604 struct smb_vol *volume_info;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400605 struct cifs_mnt_data mnt_data;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000606 struct dentry *root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
Joe Perchesb6b38f72010-04-21 03:50:45 +0000608 cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609
Jeff Layton04db79b2011-07-06 08:10:38 -0400610 volume_info = cifs_get_volume_info((char *)data, dev_name);
611 if (IS_ERR(volume_info))
612 return ERR_CAST(volume_info);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000613
614 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
615 if (cifs_sb == NULL) {
616 root = ERR_PTR(-ENOMEM);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400617 goto out_nls;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000618 }
619
Al Viro5d3bc602011-06-17 09:17:28 -0400620 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
621 if (cifs_sb->mountdata == NULL) {
622 root = ERR_PTR(-ENOMEM);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400623 goto out_cifs_sb;
Al Viro5d3bc602011-06-17 09:17:28 -0400624 }
625
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000626 cifs_setup_cifs_sb(volume_info, cifs_sb);
627
Al Viro97d11522011-06-17 09:29:57 -0400628 rc = cifs_mount(cifs_sb, volume_info);
629 if (rc) {
630 if (!(flags & MS_SILENT))
631 cERROR(1, "cifs_mount failed w/return code = %d", rc);
632 root = ERR_PTR(rc);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400633 goto out_mountdata;
Al Viro97d11522011-06-17 09:29:57 -0400634 }
635
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400636 mnt_data.vol = volume_info;
637 mnt_data.cifs_sb = cifs_sb;
638 mnt_data.flags = flags;
639
Al Viroee01a142011-06-17 09:47:23 -0400640 sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000641 if (IS_ERR(sb)) {
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000642 root = ERR_CAST(sb);
Al Viro97d11522011-06-17 09:29:57 -0400643 cifs_umount(cifs_sb);
Al Virod757d712011-06-17 09:42:43 -0400644 goto out;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000645 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646
Al Viroee01a142011-06-17 09:47:23 -0400647 if (sb->s_root) {
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400648 cFYI(1, "Use existing superblock");
Al Viro97d11522011-06-17 09:29:57 -0400649 cifs_umount(cifs_sb);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400650 } else {
651 sb->s_flags = flags;
652 /* BB should we make this contingent on mount parm? */
653 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
654
655 rc = cifs_read_super(sb);
656 if (rc) {
657 root = ERR_PTR(rc);
658 goto out_super;
659 }
660
661 sb->s_flags |= MS_ACTIVE;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400662 }
663
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400664 root = cifs_get_root(volume_info, sb);
Al Viro9403c9c2011-06-17 10:02:59 -0400665 if (IS_ERR(root))
Al Virofa18f1b2011-06-17 09:50:44 -0400666 goto out_super;
Al Virofa18f1b2011-06-17 09:50:44 -0400667
668 cFYI(1, "dentry root is: %p", root);
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400669 goto out;
670
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400671out_super:
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400672 deactivate_locked_super(sb);
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400673out:
Jeff Laytonf9e59bc2011-07-06 08:10:37 -0400674 cifs_cleanup_volume_info(volume_info);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000675 return root;
Al Viro5c4f1ad2011-06-17 09:56:55 -0400676
677out_mountdata:
678 kfree(cifs_sb->mountdata);
679out_cifs_sb:
680 kfree(cifs_sb);
681out_nls:
682 unload_nls(volume_info->local_nls);
683 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684}
685
Badari Pulavarty027445c2006-09-30 23:28:46 -0700686static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
687 unsigned long nr_segs, loff_t pos)
Steve French87c89dd2005-11-17 17:03:00 -0800688{
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800689 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
Steve French87c89dd2005-11-17 17:03:00 -0800690 ssize_t written;
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500691 int rc;
Steve French87c89dd2005-11-17 17:03:00 -0800692
Badari Pulavarty027445c2006-09-30 23:28:46 -0700693 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500694
695 if (CIFS_I(inode)->clientCanCacheAll)
696 return written;
697
698 rc = filemap_fdatawrite(inode->i_mapping);
699 if (rc)
700 cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode);
701
Steve French87c89dd2005-11-17 17:03:00 -0800702 return written;
703}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
Steve Frenchc32a0b62006-01-12 14:41:28 -0800705static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
706{
Josef Bacik06222e42011-07-18 13:21:38 -0400707 /*
708 * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
709 * the cached file length
710 */
Dan Carpenter48a57302012-04-30 17:36:21 +0300711 if (origin != SEEK_SET && origin != SEEK_CUR) {
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400712 int rc;
713 struct inode *inode = file->f_path.dentry->d_inode;
Steve French030e9d82007-02-01 04:27:59 +0000714
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400715 /*
716 * We need to be sure that all dirty pages are written and the
717 * server has the newest file length.
718 */
719 if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping &&
720 inode->i_mapping->nrpages != 0) {
721 rc = filemap_fdatawait(inode->i_mapping);
Steve French156ecb22011-05-20 17:00:01 +0000722 if (rc) {
723 mapping_set_error(inode->i_mapping, rc);
724 return rc;
725 }
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400726 }
727 /*
728 * Some applications poll for the file length in this strange
729 * way so we must seek to end on non-oplocked files by
730 * setting the revalidate time to zero.
731 */
732 CIFS_I(inode)->time = 0;
Steve French030e9d82007-02-01 04:27:59 +0000733
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400734 rc = cifs_revalidate_file_attr(file);
735 if (rc < 0)
736 return (loff_t)rc;
Steve Frenchc32a0b62006-01-12 14:41:28 -0800737 }
Andi Kleenef3d0fd2011-09-15 16:06:48 -0700738 return generic_file_llseek(file, offset, origin);
Steve Frenchc32a0b62006-01-12 14:41:28 -0800739}
740
Steve French84210e92008-10-23 04:42:37 +0000741static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
742{
Arnd Bergmannb89f4322010-09-18 15:09:31 +0200743 /* note that this is called by vfs setlease with lock_flocks held
744 to protect *lease from going away */
Steve French84210e92008-10-23 04:42:37 +0000745 struct inode *inode = file->f_path.dentry->d_inode;
Jeff Laytonba00ba62010-09-20 16:01:31 -0700746 struct cifsFileInfo *cfile = file->private_data;
Steve French84210e92008-10-23 04:42:37 +0000747
748 if (!(S_ISREG(inode->i_mode)))
749 return -EINVAL;
750
751 /* check if file is oplocked */
752 if (((arg == F_RDLCK) &&
753 (CIFS_I(inode)->clientCanCacheRead)) ||
754 ((arg == F_WRLCK) &&
755 (CIFS_I(inode)->clientCanCacheAll)))
756 return generic_setlease(file, arg, lease);
Jeff Layton13cfb732010-09-29 19:51:11 -0400757 else if (tlink_tcon(cfile->tlink)->local_lease &&
758 !CIFS_I(inode)->clientCanCacheRead)
Steve French84210e92008-10-23 04:42:37 +0000759 /* If the server claims to support oplock on this
760 file, then we still need to check oplock even
761 if the local_lease mount option is set, but there
762 are servers which do not support oplock for which
763 this mount option may be useful if the user
764 knows that the file won't be changed on the server
765 by anyone else */
766 return generic_setlease(file, arg, lease);
Christoph Hellwig51ee4b82010-10-31 08:35:10 -0400767 else
Steve French84210e92008-10-23 04:42:37 +0000768 return -EAGAIN;
769}
Steve French84210e92008-10-23 04:42:37 +0000770
Igor Mammedove6ab1582008-01-11 01:49:48 +0000771struct file_system_type cifs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 .owner = THIS_MODULE,
773 .name = "cifs",
Al Virod753ed92010-07-26 12:52:33 +0400774 .mount = cifs_do_mount,
Al Viro6d686172011-06-17 08:34:57 -0400775 .kill_sb = cifs_kill_sb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 /* .fs_flags */
777};
Arjan van de Ven754661f2007-02-12 00:55:38 -0800778const struct inode_operations cifs_dir_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 .create = cifs_create,
780 .lookup = cifs_lookup,
781 .getattr = cifs_getattr,
782 .unlink = cifs_unlink,
783 .link = cifs_hardlink,
784 .mkdir = cifs_mkdir,
785 .rmdir = cifs_rmdir,
786 .rename = cifs_rename,
787 .permission = cifs_permission,
788/* revalidate:cifs_revalidate, */
789 .setattr = cifs_setattr,
790 .symlink = cifs_symlink,
791 .mknod = cifs_mknod,
792#ifdef CONFIG_CIFS_XATTR
793 .setxattr = cifs_setxattr,
794 .getxattr = cifs_getxattr,
795 .listxattr = cifs_listxattr,
796 .removexattr = cifs_removexattr,
797#endif
798};
799
Arjan van de Ven754661f2007-02-12 00:55:38 -0800800const struct inode_operations cifs_file_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801/* revalidate:cifs_revalidate, */
802 .setattr = cifs_setattr,
803 .getattr = cifs_getattr, /* do we need this anymore? */
804 .rename = cifs_rename,
805 .permission = cifs_permission,
806#ifdef CONFIG_CIFS_XATTR
807 .setxattr = cifs_setxattr,
808 .getxattr = cifs_getxattr,
809 .listxattr = cifs_listxattr,
810 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000811#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812};
813
Arjan van de Ven754661f2007-02-12 00:55:38 -0800814const struct inode_operations cifs_symlink_inode_ops = {
Steve French50c2f752007-07-13 00:33:32 +0000815 .readlink = generic_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 .follow_link = cifs_follow_link,
817 .put_link = cifs_put_link,
818 .permission = cifs_permission,
819 /* BB add the following two eventually */
820 /* revalidate: cifs_revalidate,
821 setattr: cifs_notify_change, *//* BB do we need notify change */
822#ifdef CONFIG_CIFS_XATTR
823 .setxattr = cifs_setxattr,
824 .getxattr = cifs_getxattr,
825 .listxattr = cifs_listxattr,
826 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000827#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828};
829
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800830const struct file_operations cifs_file_ops = {
Steve French87c89dd2005-11-17 17:03:00 -0800831 .read = do_sync_read,
832 .write = do_sync_write,
Steve French87c89dd2005-11-17 17:03:00 -0800833 .aio_read = generic_file_aio_read,
834 .aio_write = cifs_file_aio_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 .open = cifs_open,
836 .release = cifs_close,
837 .lock = cifs_lock,
838 .fsync = cifs_fsync,
839 .flush = cifs_flush,
840 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200841 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800842 .llseek = cifs_llseek,
Steve Frenchc67593a2005-04-28 22:41:04 -0700843#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000844 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700845#endif /* CONFIG_CIFS_POSIX */
Steve French84210e92008-10-23 04:42:37 +0000846 .setlease = cifs_setlease,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847};
848
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300849const struct file_operations cifs_file_strict_ops = {
850 .read = do_sync_read,
851 .write = do_sync_write,
Pavel Shilovskya70307e2010-12-14 11:50:41 +0300852 .aio_read = cifs_strict_readv,
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500853 .aio_write = cifs_strict_writev,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300854 .open = cifs_open,
855 .release = cifs_close,
856 .lock = cifs_lock,
857 .fsync = cifs_strict_fsync,
858 .flush = cifs_flush,
Pavel Shilovsky7a6a19b2010-12-14 11:29:51 +0300859 .mmap = cifs_file_strict_mmap,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300860 .splice_read = generic_file_splice_read,
861 .llseek = cifs_llseek,
862#ifdef CONFIG_CIFS_POSIX
863 .unlocked_ioctl = cifs_ioctl,
864#endif /* CONFIG_CIFS_POSIX */
865 .setlease = cifs_setlease,
866};
867
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800868const struct file_operations cifs_file_direct_ops = {
Pavel Shilovsky0b81c1c2011-03-10 10:11:05 +0300869 /* BB reevaluate whether they can be done with directio, no cache */
870 .read = do_sync_read,
871 .write = do_sync_write,
872 .aio_read = cifs_user_readv,
873 .aio_write = cifs_user_writev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 .open = cifs_open,
875 .release = cifs_close,
876 .lock = cifs_lock,
877 .fsync = cifs_fsync,
878 .flush = cifs_flush,
Steve Frencha994b8f2009-12-07 05:44:46 +0000879 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200880 .splice_read = generic_file_splice_read,
Steve Frenchc67593a2005-04-28 22:41:04 -0700881#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000882 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700883#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -0800884 .llseek = cifs_llseek,
Steve French84210e92008-10-23 04:42:37 +0000885 .setlease = cifs_setlease,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886};
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300887
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800888const struct file_operations cifs_file_nobrl_ops = {
Steve French87c89dd2005-11-17 17:03:00 -0800889 .read = do_sync_read,
890 .write = do_sync_write,
Steve French87c89dd2005-11-17 17:03:00 -0800891 .aio_read = generic_file_aio_read,
892 .aio_write = cifs_file_aio_write,
893 .open = cifs_open,
894 .release = cifs_close,
895 .fsync = cifs_fsync,
896 .flush = cifs_flush,
897 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200898 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800899 .llseek = cifs_llseek,
Steve French8b94bcb2005-11-11 11:41:00 -0800900#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000901 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -0800902#endif /* CONFIG_CIFS_POSIX */
Steve French84210e92008-10-23 04:42:37 +0000903 .setlease = cifs_setlease,
Steve French8b94bcb2005-11-11 11:41:00 -0800904};
905
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300906const struct file_operations cifs_file_strict_nobrl_ops = {
907 .read = do_sync_read,
908 .write = do_sync_write,
Pavel Shilovskya70307e2010-12-14 11:50:41 +0300909 .aio_read = cifs_strict_readv,
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500910 .aio_write = cifs_strict_writev,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300911 .open = cifs_open,
912 .release = cifs_close,
913 .fsync = cifs_strict_fsync,
914 .flush = cifs_flush,
Pavel Shilovsky7a6a19b2010-12-14 11:29:51 +0300915 .mmap = cifs_file_strict_mmap,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300916 .splice_read = generic_file_splice_read,
917 .llseek = cifs_llseek,
918#ifdef CONFIG_CIFS_POSIX
919 .unlocked_ioctl = cifs_ioctl,
920#endif /* CONFIG_CIFS_POSIX */
921 .setlease = cifs_setlease,
922};
923
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800924const struct file_operations cifs_file_direct_nobrl_ops = {
Pavel Shilovsky0b81c1c2011-03-10 10:11:05 +0300925 /* BB reevaluate whether they can be done with directio, no cache */
926 .read = do_sync_read,
927 .write = do_sync_write,
928 .aio_read = cifs_user_readv,
929 .aio_write = cifs_user_writev,
Steve French87c89dd2005-11-17 17:03:00 -0800930 .open = cifs_open,
931 .release = cifs_close,
932 .fsync = cifs_fsync,
933 .flush = cifs_flush,
Pavel Shilovsky810627a02010-03-27 02:00:49 +0000934 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200935 .splice_read = generic_file_splice_read,
Steve French8b94bcb2005-11-11 11:41:00 -0800936#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000937 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -0800938#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -0800939 .llseek = cifs_llseek,
Steve French84210e92008-10-23 04:42:37 +0000940 .setlease = cifs_setlease,
Steve French8b94bcb2005-11-11 11:41:00 -0800941};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800943const struct file_operations cifs_dir_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 .readdir = cifs_readdir,
945 .release = cifs_closedir,
946 .read = generic_read_dir,
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000947 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig3222a3e2008-09-03 21:53:01 +0200948 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949};
950
951static void
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700952cifs_init_once(void *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953{
954 struct cifsInodeInfo *cifsi = inode;
955
Christoph Lametera35afb82007-05-16 22:10:57 -0700956 inode_init_once(&cifsi->vfs_inode);
Pavel Shilovskyd59dad22011-09-22 09:53:59 +0400957 INIT_LIST_HEAD(&cifsi->llist);
958 mutex_init(&cifsi->lock_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959}
960
961static int
962cifs_init_inodecache(void)
963{
964 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
Steve French26f57362007-08-30 22:09:15 +0000965 sizeof(struct cifsInodeInfo),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800966 0, (SLAB_RECLAIM_ACCOUNT|
967 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900968 cifs_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 if (cifs_inode_cachep == NULL)
970 return -ENOMEM;
971
972 return 0;
973}
974
975static void
976cifs_destroy_inodecache(void)
977{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700978 kmem_cache_destroy(cifs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979}
980
981static int
982cifs_init_request_bufs(void)
983{
Steve French4523cc32007-04-30 20:13:06 +0000984 if (CIFSMaxBufSize < 8192) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
986 Unicode path name has to fit in any SMB/CIFS path based frames */
987 CIFSMaxBufSize = 8192;
988 } else if (CIFSMaxBufSize > 1024*127) {
989 CIFSMaxBufSize = 1024 * 127;
990 } else {
991 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
992 }
Joe Perchesb6b38f72010-04-21 03:50:45 +0000993/* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 cifs_req_cachep = kmem_cache_create("cifs_request",
995 CIFSMaxBufSize +
996 MAX_CIFS_HDR_SIZE, 0,
Paul Mundt20c2df82007-07-20 10:11:58 +0900997 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 if (cifs_req_cachep == NULL)
999 return -ENOMEM;
1000
Steve French4523cc32007-04-30 20:13:06 +00001001 if (cifs_min_rcv < 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 cifs_min_rcv = 1;
1003 else if (cifs_min_rcv > 64) {
1004 cifs_min_rcv = 64;
Joe Perchesb6b38f72010-04-21 03:50:45 +00001005 cERROR(1, "cifs_min_rcv set to maximum (64)");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 }
1007
Matthew Dobson93d23412006-03-26 01:37:50 -08001008 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1009 cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010
Steve French4523cc32007-04-30 20:13:06 +00001011 if (cifs_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 kmem_cache_destroy(cifs_req_cachep);
1013 return -ENOMEM;
1014 }
Steve Frenchec637e32005-12-12 20:53:18 -08001015 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 almost all handle based requests (but not write response, nor is it
1017 sufficient for path based requests). A smaller size would have
Steve French50c2f752007-07-13 00:33:32 +00001018 been more efficient (compacting multiple slab items on one 4k page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 for the case in which debug was on, but this larger size allows
1020 more SMBs to use small buffer alloc and is still much more
Steve French6dc0f872007-07-06 23:13:06 +00001021 efficient to alloc 1 per page off the slab compared to 17K (5page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 alloc of large cifs buffers even when page debugging is on */
1023 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
Steve French6dc0f872007-07-06 23:13:06 +00001024 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +09001025 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 if (cifs_sm_req_cachep == NULL) {
1027 mempool_destroy(cifs_req_poolp);
1028 kmem_cache_destroy(cifs_req_cachep);
Steve French6dc0f872007-07-06 23:13:06 +00001029 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 }
1031
Steve French4523cc32007-04-30 20:13:06 +00001032 if (cifs_min_small < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 cifs_min_small = 2;
1034 else if (cifs_min_small > 256) {
1035 cifs_min_small = 256;
Joe Perchesb6b38f72010-04-21 03:50:45 +00001036 cFYI(1, "cifs_min_small set to maximum (256)");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 }
1038
Matthew Dobson93d23412006-03-26 01:37:50 -08001039 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1040 cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041
Steve French4523cc32007-04-30 20:13:06 +00001042 if (cifs_sm_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 mempool_destroy(cifs_req_poolp);
1044 kmem_cache_destroy(cifs_req_cachep);
1045 kmem_cache_destroy(cifs_sm_req_cachep);
1046 return -ENOMEM;
1047 }
1048
1049 return 0;
1050}
1051
1052static void
1053cifs_destroy_request_bufs(void)
1054{
1055 mempool_destroy(cifs_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001056 kmem_cache_destroy(cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 mempool_destroy(cifs_sm_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001058 kmem_cache_destroy(cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059}
1060
1061static int
1062cifs_init_mids(void)
1063{
1064 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
Steve French26f57362007-08-30 22:09:15 +00001065 sizeof(struct mid_q_entry), 0,
1066 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 if (cifs_mid_cachep == NULL)
1068 return -ENOMEM;
1069
Matthew Dobson93d23412006-03-26 01:37:50 -08001070 /* 3 is a reasonable minimum number of simultaneous operations */
1071 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
Steve French4523cc32007-04-30 20:13:06 +00001072 if (cifs_mid_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 kmem_cache_destroy(cifs_mid_cachep);
1074 return -ENOMEM;
1075 }
1076
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 return 0;
1078}
1079
1080static void
1081cifs_destroy_mids(void)
1082{
1083 mempool_destroy(cifs_mid_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001084 kmem_cache_destroy(cifs_mid_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085}
1086
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087static int __init
1088init_cifs(void)
1089{
1090 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 cifs_proc_init();
Jeff Laytone7ddee92008-11-14 13:44:38 -05001092 INIT_LIST_HEAD(&cifs_tcp_ses_list);
Steve French0eff0e22011-02-24 05:39:23 +00001093#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
Steve French4ca9c192005-10-10 19:52:13 -07001094 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1095 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
Steve French0eff0e22011-02-24 05:39:23 +00001096#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097/*
1098 * Initialize Global counters
1099 */
1100 atomic_set(&sesInfoAllocCount, 0);
1101 atomic_set(&tconInfoAllocCount, 0);
Steve French6dc0f872007-07-06 23:13:06 +00001102 atomic_set(&tcpSesAllocCount, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 atomic_set(&tcpSesReconnectCount, 0);
1104 atomic_set(&tconInfoReconnectCount, 0);
1105
1106 atomic_set(&bufAllocCount, 0);
Steve French4498eed52005-12-03 13:58:57 -08001107 atomic_set(&smBufAllocCount, 0);
1108#ifdef CONFIG_CIFS_STATS2
1109 atomic_set(&totBufAllocCount, 0);
1110 atomic_set(&totSmBufAllocCount, 0);
1111#endif /* CONFIG_CIFS_STATS2 */
1112
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 atomic_set(&midCount, 0);
1114 GlobalCurrentXid = 0;
1115 GlobalTotalActiveXid = 0;
1116 GlobalMaxActiveXid = 0;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301117 spin_lock_init(&cifs_tcp_ses_lock);
Jeff Layton44772882010-10-15 15:34:03 -04001118 spin_lock_init(&cifs_file_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 spin_lock_init(&GlobalMid_Lock);
1120
Steve French4523cc32007-04-30 20:13:06 +00001121 if (cifs_max_pending < 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 cifs_max_pending = 2;
Joe Perchesb6b38f72010-04-21 03:50:45 +00001123 cFYI(1, "cifs_max_pending set to min of 2");
Pavel Shilovsky10b9b982012-03-20 12:55:09 +03001124 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1125 cifs_max_pending = CIFS_MAX_REQ;
1126 cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 }
1128
Jeff Laytonda472fc2012-03-23 14:40:53 -04001129 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1130 if (!cifsiod_wq) {
1131 rc = -ENOMEM;
1132 goto out_clean_proc;
1133 }
1134
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301135 rc = cifs_fscache_register();
1136 if (rc)
Jeff Laytonda472fc2012-03-23 14:40:53 -04001137 goto out_destroy_wq;
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301138
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 rc = cifs_init_inodecache();
Steve French45af7a02006-04-21 22:52:25 +00001140 if (rc)
Steve Frenchd3bf5222010-09-22 19:15:36 +00001141 goto out_unreg_fscache;
Steve French45af7a02006-04-21 22:52:25 +00001142
1143 rc = cifs_init_mids();
1144 if (rc)
1145 goto out_destroy_inodecache;
1146
1147 rc = cifs_init_request_bufs();
1148 if (rc)
1149 goto out_destroy_mids;
1150
Jeff Layton84a15b92007-11-03 05:02:24 +00001151#ifdef CONFIG_CIFS_UPCALL
1152 rc = register_key_type(&cifs_spnego_key_type);
1153 if (rc)
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001154 goto out_destroy_request_bufs;
1155#endif /* CONFIG_CIFS_UPCALL */
1156
1157#ifdef CONFIG_CIFS_ACL
1158 rc = init_cifs_idmap();
1159 if (rc)
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001160 goto out_register_key_type;
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001161#endif /* CONFIG_CIFS_ACL */
1162
1163 rc = register_filesystem(&cifs_fs_type);
1164 if (rc)
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001165 goto out_init_cifs_idmap;
Steve French45af7a02006-04-21 22:52:25 +00001166
Steve French45af7a02006-04-21 22:52:25 +00001167 return 0;
1168
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001169out_init_cifs_idmap:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001170#ifdef CONFIG_CIFS_ACL
1171 exit_cifs_idmap();
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001172out_register_key_type:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001173#endif
1174#ifdef CONFIG_CIFS_UPCALL
1175 unregister_key_type(&cifs_spnego_key_type);
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001176out_destroy_request_bufs:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001177#endif
Steve French45af7a02006-04-21 22:52:25 +00001178 cifs_destroy_request_bufs();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001179out_destroy_mids:
Steve French45af7a02006-04-21 22:52:25 +00001180 cifs_destroy_mids();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001181out_destroy_inodecache:
Steve French45af7a02006-04-21 22:52:25 +00001182 cifs_destroy_inodecache();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001183out_unreg_fscache:
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301184 cifs_fscache_unregister();
Jeff Laytonda472fc2012-03-23 14:40:53 -04001185out_destroy_wq:
1186 destroy_workqueue(cifsiod_wq);
Steve Frenchd3bf5222010-09-22 19:15:36 +00001187out_clean_proc:
1188 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 return rc;
1190}
1191
1192static void __exit
1193exit_cifs(void)
1194{
Joe Perchesb6b38f72010-04-21 03:50:45 +00001195 cFYI(DBG2, "exit_cifs");
Jeff Layton3dd93302012-03-21 06:27:55 -04001196 unregister_filesystem(&cifs_fs_type);
Igor Mammedov78d31a32008-04-24 12:56:07 +04001197 cifs_dfs_release_automount_timer();
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001198#ifdef CONFIG_CIFS_ACL
1199 cifs_destroy_idmaptrees();
1200 exit_cifs_idmap();
1201#endif
Jeff Layton84a15b92007-11-03 05:02:24 +00001202#ifdef CONFIG_CIFS_UPCALL
1203 unregister_key_type(&cifs_spnego_key_type);
1204#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 cifs_destroy_request_bufs();
Jeff Layton3dd93302012-03-21 06:27:55 -04001206 cifs_destroy_mids();
1207 cifs_destroy_inodecache();
1208 cifs_fscache_unregister();
Jeff Laytonda472fc2012-03-23 14:40:53 -04001209 destroy_workqueue(cifsiod_wq);
Jeff Layton3dd93302012-03-21 06:27:55 -04001210 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211}
1212
1213MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
Steve French6dc0f872007-07-06 23:13:06 +00001214MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215MODULE_DESCRIPTION
Steve French63135e02007-07-17 17:34:02 +00001216 ("VFS to access servers complying with the SNIA CIFS Specification "
1217 "e.g. Samba and Windows");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218MODULE_VERSION(CIFS_VERSION);
1219module_init(init_cifs)
1220module_exit(exit_cifs)