blob: 84b75253b05a01cf13748b33d642e58a515e7c41 [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>
Alessio Igor Bogani67e55202009-04-24 09:06:53 +020038#include <linux/smp_lock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include "cifsfs.h"
40#include "cifspdu.h"
41#define DECLARE_GLOBALS_HERE
42#include "cifsglob.h"
43#include "cifsproto.h"
44#include "cifs_debug.h"
45#include "cifs_fs_sb.h"
46#include <linux/mm.h>
Jeff Layton84a15b92007-11-03 05:02:24 +000047#include <linux/key-type.h>
Steve French61033352008-01-09 16:21:36 +000048#include "dns_resolve.h"
Jeff Laytone5459372007-11-03 05:11:06 +000049#include "cifs_spnego.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
51
52#ifdef CONFIG_CIFS_QUOTA
53static struct quotactl_ops cifs_quotactl_ops;
Steve French35c11fd2007-02-27 05:09:35 +000054#endif /* QUOTA */
55
Linus Torvalds1da177e2005-04-16 15:20:36 -070056int cifsFYI = 0;
57int cifsERROR = 1;
58int traceSMB = 0;
59unsigned int oplockEnabled = 1;
60unsigned int experimEnabled = 0;
61unsigned int linuxExtEnabled = 1;
62unsigned int lookupCacheEnabled = 1;
63unsigned int multiuser_mount = 0;
Steve French39798772006-05-31 22:40:51 +000064unsigned int extended_security = CIFSSEC_DEF;
65/* unsigned int ntlmv2_support = 0; */
Linus Torvalds1da177e2005-04-16 15:20:36 -070066unsigned int sign_CIFS_PDUs = 1;
Steve French6dc0f872007-07-06 23:13:06 +000067extern struct task_struct *oplockThread; /* remove sparse warning */
68struct task_struct *oplockThread = NULL;
Steve French99ee4db2007-02-27 05:35:17 +000069/* extern struct task_struct * dnotifyThread; remove sparse warning */
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -080070static const struct super_operations cifs_super_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070071unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
72module_param(CIFSMaxBufSize, int, 0);
Steve French63135e02007-07-17 17:34:02 +000073MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
74 "Default: 16384 Range: 8192 to 130048");
Linus Torvalds1da177e2005-04-16 15:20:36 -070075unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
76module_param(cifs_min_rcv, int, 0);
Steve French63135e02007-07-17 17:34:02 +000077MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
78 "1 to 64");
Linus Torvalds1da177e2005-04-16 15:20:36 -070079unsigned int cifs_min_small = 30;
80module_param(cifs_min_small, int, 0);
Steve French63135e02007-07-17 17:34:02 +000081MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
82 "Range: 2 to 256");
Linus Torvalds1da177e2005-04-16 15:20:36 -070083unsigned int cifs_max_pending = CIFS_MAX_REQ;
84module_param(cifs_max_pending, int, 0);
Steve French63135e02007-07-17 17:34:02 +000085MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
86 "Default: 50 Range: 2 to 256");
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
Linus Torvalds1da177e2005-04-16 15:20:36 -070088extern mempool_t *cifs_sm_req_poolp;
89extern mempool_t *cifs_req_poolp;
90extern mempool_t *cifs_mid_poolp;
91
Christoph Lametere18b8902006-12-06 20:33:20 -080092extern struct kmem_cache *cifs_oplock_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
94static int
95cifs_read_super(struct super_block *sb, void *data,
96 const char *devname, int silent)
97{
98 struct inode *inode;
99 struct cifs_sb_info *cifs_sb;
100 int rc = 0;
Steve French50c2f752007-07-13 00:33:32 +0000101
Steve French1b2b2122007-02-17 04:30:54 +0000102 /* BB should we make this contingent on mount parm? */
103 sb->s_flags |= MS_NODIRATIME | MS_NOATIME;
Steve French790fe572007-07-07 19:25:05 +0000104 sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 cifs_sb = CIFS_SB(sb);
Steve French4523cc32007-04-30 20:13:06 +0000106 if (cifs_sb == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
Igor Mammedove6ab1582008-01-11 01:49:48 +0000109#ifdef CONFIG_CIFS_DFS_UPCALL
110 /* copy mount params to sb for use in submounts */
111 /* BB: should we move this after the mount so we
112 * do not have to do the copy on failed mounts?
113 * BB: May be it is better to do simple copy before
114 * complex operation (mount), and in case of fail
115 * just exit instead of doing mount and attempting
116 * undo it if this copy fails?*/
Steve French79ee9a82008-06-10 21:37:02 +0000117 if (data) {
118 int len = strlen(data);
119 cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
120 if (cifs_sb->mountdata == NULL) {
121 kfree(sb->s_fs_info);
122 sb->s_fs_info = NULL;
123 return -ENOMEM;
124 }
125 strncpy(cifs_sb->mountdata, data, len + 1);
126 cifs_sb->mountdata[len] = '\0';
Igor Mammedove6ab1582008-01-11 01:49:48 +0000127 }
Igor Mammedove6ab1582008-01-11 01:49:48 +0000128#endif
129
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 rc = cifs_mount(sb, cifs_sb, data, devname);
131
132 if (rc) {
133 if (!silent)
134 cERROR(1,
135 ("cifs_mount failed w/return code = %d", rc));
136 goto out_mount_failed;
137 }
138
139 sb->s_magic = CIFS_MAGIC_NUMBER;
140 sb->s_op = &cifs_super_ops;
Steve French4523cc32007-04-30 20:13:06 +0000141/* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512)
Steve French790fe572007-07-07 19:25:05 +0000142 sb->s_blocksize =
143 cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144#ifdef CONFIG_CIFS_QUOTA
145 sb->s_qcop = &cifs_quotactl_ops;
146#endif
147 sb->s_blocksize = CIFS_MAX_MSGSIZE;
148 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
Jeff Laytonbd433d42009-05-27 09:37:34 -0400149 inode = cifs_root_iget(sb, ROOT_I);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
David Howellsce634ab2008-02-07 00:15:33 -0800151 if (IS_ERR(inode)) {
152 rc = PTR_ERR(inode);
153 inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 goto out_no_root;
155 }
156
157 sb->s_root = d_alloc_root(inode);
158
159 if (!sb->s_root) {
160 rc = -ENOMEM;
161 goto out_no_root;
162 }
Steve French50c2f752007-07-13 00:33:32 +0000163
Steve French7521a3c2007-07-11 18:30:34 +0000164#ifdef CONFIG_CIFS_EXPERIMENTAL
165 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
166 cFYI(1, ("export ops supported"));
167 sb->s_export_op = &cifs_export_ops;
168 }
169#endif /* EXPERIMENTAL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171 return 0;
172
173out_no_root:
174 cERROR(1, ("cifs_read_super: get root inode failed"));
175 if (inode)
176 iput(inode);
Steve French54b46022008-08-11 22:31:40 +0000177
Steve French2c731af2008-08-11 22:28:53 +0000178 cifs_umount(sb, cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180out_mount_failed:
Steve French4523cc32007-04-30 20:13:06 +0000181 if (cifs_sb) {
Igor Mammedove6ab1582008-01-11 01:49:48 +0000182#ifdef CONFIG_CIFS_DFS_UPCALL
183 if (cifs_sb->mountdata) {
184 kfree(cifs_sb->mountdata);
185 cifs_sb->mountdata = NULL;
186 }
187#endif
Steve French4523cc32007-04-30 20:13:06 +0000188 if (cifs_sb->local_nls)
Steve French50c2f752007-07-13 00:33:32 +0000189 unload_nls(cifs_sb->local_nls);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 kfree(cifs_sb);
191 }
192 return rc;
193}
194
195static void
196cifs_put_super(struct super_block *sb)
197{
198 int rc = 0;
199 struct cifs_sb_info *cifs_sb;
200
201 cFYI(1, ("In cifs_put_super"));
202 cifs_sb = CIFS_SB(sb);
Steve French4523cc32007-04-30 20:13:06 +0000203 if (cifs_sb == NULL) {
Steve French790fe572007-07-07 19:25:05 +0000204 cFYI(1, ("Empty cifs superblock info passed to unmount"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 return;
206 }
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200207
208 lock_kernel();
209
Steve French790fe572007-07-07 19:25:05 +0000210 rc = cifs_umount(sb, cifs_sb);
Steve Frenchad7a2922008-02-07 23:25:02 +0000211 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 cERROR(1, ("cifs_umount failed with return code %d", rc));
Igor Mammedove6ab1582008-01-11 01:49:48 +0000213#ifdef CONFIG_CIFS_DFS_UPCALL
214 if (cifs_sb->mountdata) {
215 kfree(cifs_sb->mountdata);
216 cifs_sb->mountdata = NULL;
217 }
218#endif
219
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 unload_nls(cifs_sb->local_nls);
221 kfree(cifs_sb);
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200222
223 unlock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224}
225
226static int
David Howells726c3342006-06-23 02:02:58 -0700227cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
David Howells726c3342006-06-23 02:02:58 -0700229 struct super_block *sb = dentry->d_sb;
Steve French39da9842008-04-28 04:04:34 +0000230 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
231 struct cifsTconInfo *tcon = cifs_sb->tcon;
Steve Frenchc81156d2005-04-28 22:41:07 -0700232 int rc = -EOPNOTSUPP;
Steve French39da9842008-04-28 04:04:34 +0000233 int xid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
235 xid = GetXid();
236
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 buf->f_type = CIFS_MAGIC_NUMBER;
238
Steve French39da9842008-04-28 04:04:34 +0000239 /*
240 * PATH_MAX may be too long - it would presumably be total path,
241 * but note that some servers (includinng Samba 3) have a shorter
242 * maximum path.
243 *
244 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
245 */
246 buf->f_namelen = PATH_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 buf->f_files = 0; /* undefined */
248 buf->f_ffree = 0; /* unlimited */
249
Steve French39da9842008-04-28 04:04:34 +0000250 /*
251 * We could add a second check for a QFS Unix capability bit
252 */
253 if ((tcon->ses->capabilities & CAP_UNIX) &&
254 (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability)))
255 rc = CIFSSMBQFSPosixInfo(xid, tcon, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
Steve French39da9842008-04-28 04:04:34 +0000257 /*
258 * Only need to call the old QFSInfo if failed on newer one,
259 * e.g. by OS/2.
260 **/
261 if (rc && (tcon->ses->capabilities & CAP_NT_SMBS))
262 rc = CIFSSMBQFSInfo(xid, tcon, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
Steve French39da9842008-04-28 04:04:34 +0000264 /*
265 * Some old Windows servers also do not support level 103, retry with
266 * older level one if old server failed the previous call or we
267 * bypassed it because we detected that this was an older LANMAN sess
268 */
Steve French4523cc32007-04-30 20:13:06 +0000269 if (rc)
Steve French39da9842008-04-28 04:04:34 +0000270 rc = SMBOldQFSInfo(xid, tcon, buf);
271
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 FreeXid(xid);
Steve French39da9842008-04-28 04:04:34 +0000273 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274}
275
Al Viroe6305c42008-07-15 21:03:57 -0400276static int cifs_permission(struct inode *inode, int mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277{
278 struct cifs_sb_info *cifs_sb;
279
280 cifs_sb = CIFS_SB(inode->i_sb);
281
Miklos Szeredif696a362008-07-31 13:41:58 +0200282 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
283 if ((mask & MAY_EXEC) && !execute_ok(inode))
284 return -EACCES;
285 else
286 return 0;
287 } else /* file mode might have been restricted at mount time
Steve French50c2f752007-07-13 00:33:32 +0000288 on the client (above and beyond ACL on servers) for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 servers which do not support setting and viewing mode bits,
Steve French50c2f752007-07-13 00:33:32 +0000290 so allowing client to check permissions is useful */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 return generic_permission(inode, mask, NULL);
292}
293
Christoph Lametere18b8902006-12-06 20:33:20 -0800294static struct kmem_cache *cifs_inode_cachep;
295static struct kmem_cache *cifs_req_cachep;
296static struct kmem_cache *cifs_mid_cachep;
297struct kmem_cache *cifs_oplock_cachep;
298static struct kmem_cache *cifs_sm_req_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299mempool_t *cifs_sm_req_poolp;
300mempool_t *cifs_req_poolp;
301mempool_t *cifs_mid_poolp;
302
303static struct inode *
304cifs_alloc_inode(struct super_block *sb)
305{
306 struct cifsInodeInfo *cifs_inode;
Christoph Lametere94b1762006-12-06 20:33:17 -0800307 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 if (!cifs_inode)
309 return NULL;
310 cifs_inode->cifsAttrs = 0x20; /* default */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 cifs_inode->time = 0;
Jeff Laytoncea21802007-11-20 23:19:03 +0000312 cifs_inode->write_behind_rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 /* Until the file is open and we have gotten oplock
314 info back from the server, can not assume caching of
315 file data or metadata */
Steve French4b18f2a2008-04-29 00:06:05 +0000316 cifs_inode->clientCanCacheRead = false;
317 cifs_inode->clientCanCacheAll = false;
Jeff Layton9a8165f2008-10-17 21:03:20 -0400318 cifs_inode->delete_pending = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
Jeff Laytonfbec9ab2009-04-03 13:44:00 -0400320 cifs_inode->server_eof = 0;
Steve French50c2f752007-07-13 00:33:32 +0000321
Steve French1b2b2122007-02-17 04:30:54 +0000322 /* Can not set i_flags here - they get immediately overwritten
323 to zero by the VFS */
324/* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 INIT_LIST_HEAD(&cifs_inode->openFileList);
326 return &cifs_inode->vfs_inode;
327}
328
329static void
330cifs_destroy_inode(struct inode *inode)
331{
332 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
333}
334
Jeff Layton61f98ff2009-06-11 10:27:32 -0400335static void
336cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
337{
338 seq_printf(s, ",addr=");
339
340 switch (server->addr.sockAddr.sin_family) {
341 case AF_INET:
342 seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr);
343 break;
344 case AF_INET6:
345 seq_printf(s, "%pI6",
346 &server->addr.sockAddr6.sin6_addr.s6_addr);
347 if (server->addr.sockAddr6.sin6_scope_id)
348 seq_printf(s, "%%%u",
349 server->addr.sockAddr6.sin6_scope_id);
350 break;
351 default:
352 seq_printf(s, "(unknown)");
353 }
354}
355
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356/*
357 * cifs_show_options() is for displaying mount options in /proc/mounts.
358 * Not all settable options are displayed but most of the important
359 * ones are.
360 */
361static int
362cifs_show_options(struct seq_file *s, struct vfsmount *m)
363{
364 struct cifs_sb_info *cifs_sb;
Jeff Layton80909022008-12-01 07:09:35 -0500365 struct cifsTconInfo *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
367 cifs_sb = CIFS_SB(m->mnt_sb);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400368 tcon = cifs_sb->tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
Jeff Layton8616e0f2009-06-11 10:27:28 -0400370 seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName);
371 if (tcon->ses->userName)
372 seq_printf(s, ",username=%s", tcon->ses->userName);
373 if (tcon->ses->domainName)
374 seq_printf(s, ",domain=%s", tcon->ses->domainName);
375
Jeff Layton8616e0f2009-06-11 10:27:28 -0400376 seq_printf(s, ",uid=%d", cifs_sb->mnt_uid);
Jeff Layton340481a2009-06-11 10:27:29 -0400377 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
378 seq_printf(s, ",forceuid");
Jeff Layton4486d6e2009-08-03 12:45:10 -0400379 else
380 seq_printf(s, ",noforceuid");
Jeff Layton340481a2009-06-11 10:27:29 -0400381
Jeff Layton8616e0f2009-06-11 10:27:28 -0400382 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
Jeff Layton340481a2009-06-11 10:27:29 -0400383 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
384 seq_printf(s, ",forcegid");
Jeff Layton4486d6e2009-08-03 12:45:10 -0400385 else
386 seq_printf(s, ",noforcegid");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400387
Jeff Layton61f98ff2009-06-11 10:27:32 -0400388 cifs_show_address(s, tcon->ses->server);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400389
390 if (!tcon->unix_ext)
391 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
Steve French2b280fa2008-05-17 03:12:45 +0000392 cifs_sb->mnt_file_mode,
393 cifs_sb->mnt_dir_mode);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400394 if (tcon->seal)
395 seq_printf(s, ",seal");
396 if (tcon->nocase)
397 seq_printf(s, ",nocase");
398 if (tcon->retry)
399 seq_printf(s, ",hard");
400 if (cifs_sb->prepath)
401 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
402 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
403 seq_printf(s, ",posixpaths");
404 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
405 seq_printf(s, ",setuids");
406 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
407 seq_printf(s, ",serverino");
408 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
409 seq_printf(s, ",directio");
410 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
411 seq_printf(s, ",nouser_xattr");
412 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
413 seq_printf(s, ",mapchars");
414 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
415 seq_printf(s, ",sfu");
416 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
417 seq_printf(s, ",nobrl");
418 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
419 seq_printf(s, ",cifsacl");
420 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
421 seq_printf(s, ",dynperm");
422 if (m->mnt_sb->s_flags & MS_POSIXACL)
423 seq_printf(s, ",acl");
Steve French2b280fa2008-05-17 03:12:45 +0000424
Jeff Layton8616e0f2009-06-11 10:27:28 -0400425 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
426 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
427
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 return 0;
429}
430
431#ifdef CONFIG_CIFS_QUOTA
Steve French50c2f752007-07-13 00:33:32 +0000432int cifs_xquota_set(struct super_block *sb, int quota_type, qid_t qid,
433 struct fs_disk_quota *pdquota)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434{
435 int xid;
436 int rc = 0;
437 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
438 struct cifsTconInfo *pTcon;
Steve French50c2f752007-07-13 00:33:32 +0000439
Steve French4523cc32007-04-30 20:13:06 +0000440 if (cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 pTcon = cifs_sb->tcon;
442 else
443 return -EIO;
444
445
446 xid = GetXid();
Steve French4523cc32007-04-30 20:13:06 +0000447 if (pTcon) {
Steve French50c2f752007-07-13 00:33:32 +0000448 cFYI(1, ("set type: 0x%x id: %d", quota_type, qid));
Steve French61e74802008-12-03 00:57:54 +0000449 } else
Cyrill Gorcunov95ba7362007-08-24 00:23:36 +0000450 rc = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
452 FreeXid(xid);
453 return rc;
454}
455
Steve French50c2f752007-07-13 00:33:32 +0000456int cifs_xquota_get(struct super_block *sb, int quota_type, qid_t qid,
457 struct fs_disk_quota *pdquota)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458{
459 int xid;
460 int rc = 0;
461 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
462 struct cifsTconInfo *pTcon;
463
Steve French4523cc32007-04-30 20:13:06 +0000464 if (cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 pTcon = cifs_sb->tcon;
466 else
467 return -EIO;
468
469 xid = GetXid();
Steve French4523cc32007-04-30 20:13:06 +0000470 if (pTcon) {
Steve French50c2f752007-07-13 00:33:32 +0000471 cFYI(1, ("set type: 0x%x id: %d", quota_type, qid));
Steve French61e74802008-12-03 00:57:54 +0000472 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 rc = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
475 FreeXid(xid);
476 return rc;
477}
478
Steve French50c2f752007-07-13 00:33:32 +0000479int cifs_xstate_set(struct super_block *sb, unsigned int flags, int operation)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480{
Steve French50c2f752007-07-13 00:33:32 +0000481 int xid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 int rc = 0;
483 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
484 struct cifsTconInfo *pTcon;
485
Steve French4523cc32007-04-30 20:13:06 +0000486 if (cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 pTcon = cifs_sb->tcon;
488 else
489 return -EIO;
490
491 xid = GetXid();
Steve French4523cc32007-04-30 20:13:06 +0000492 if (pTcon) {
Steve French50c2f752007-07-13 00:33:32 +0000493 cFYI(1, ("flags: 0x%x operation: 0x%x", flags, operation));
Steve French61e74802008-12-03 00:57:54 +0000494 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 rc = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496
497 FreeXid(xid);
498 return rc;
499}
500
Steve French50c2f752007-07-13 00:33:32 +0000501int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502{
503 int xid;
504 int rc = 0;
505 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
506 struct cifsTconInfo *pTcon;
507
Steve French61e74802008-12-03 00:57:54 +0000508 if (cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 pTcon = cifs_sb->tcon;
Steve French61e74802008-12-03 00:57:54 +0000510 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 return -EIO;
Steve French61e74802008-12-03 00:57:54 +0000512
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 xid = GetXid();
Steve French4523cc32007-04-30 20:13:06 +0000514 if (pTcon) {
Steve French50c2f752007-07-13 00:33:32 +0000515 cFYI(1, ("pqstats %p", qstats));
Steve French61e74802008-12-03 00:57:54 +0000516 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 rc = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518
519 FreeXid(xid);
520 return rc;
521}
522
523static struct quotactl_ops cifs_quotactl_ops = {
524 .set_xquota = cifs_xquota_set,
Roel Kluin6f7e8f32008-02-12 20:38:10 +0000525 .get_xquota = cifs_xquota_get,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 .set_xstate = cifs_xstate_set,
527 .get_xstate = cifs_xstate_get,
528};
529#endif
530
Al Viro42faad92008-04-24 07:21:56 -0400531static void cifs_umount_begin(struct super_block *sb)
Steve French68058e72005-10-10 10:34:22 -0700532{
Al Viro42faad92008-04-24 07:21:56 -0400533 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French50c2f752007-07-13 00:33:32 +0000534 struct cifsTconInfo *tcon;
Steve French68058e72005-10-10 10:34:22 -0700535
Steve French4523cc32007-04-30 20:13:06 +0000536 if (cifs_sb == NULL)
Steve French9e2e85f2005-10-10 14:28:38 -0700537 return;
538
539 tcon = cifs_sb->tcon;
Steve French4523cc32007-04-30 20:13:06 +0000540 if (tcon == NULL)
Steve French9e2e85f2005-10-10 14:28:38 -0700541 return;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500542
543 read_lock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000544 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
545 /* we have other mounts to same share or we have
546 already tried to force umount this and woken up
547 all waiting network requests, nothing to do */
548 read_unlock(&cifs_tcp_ses_lock);
549 return;
550 } else if (tcon->tc_count == 1)
Steve French5e1253b2005-10-10 14:06:37 -0700551 tcon->tidStatus = CifsExiting;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500552 read_unlock(&cifs_tcp_ses_lock);
Steve French5e1253b2005-10-10 14:06:37 -0700553
Steve French3a5ff612006-07-14 22:37:11 +0000554 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
Steve French7b7abfe2005-11-09 15:21:09 -0800555 /* cancel_notify_requests(tcon); */
Steve French50c2f752007-07-13 00:33:32 +0000556 if (tcon->ses && tcon->ses->server) {
557 cFYI(1, ("wake up tasks now - umount begin not complete"));
Steve French9e2e85f2005-10-10 14:28:38 -0700558 wake_up_all(&tcon->ses->server->request_q);
Steve French6ab16d22005-11-29 20:55:11 -0800559 wake_up_all(&tcon->ses->server->response_q);
560 msleep(1); /* yield */
561 /* we have to kick the requests once more */
562 wake_up_all(&tcon->ses->server->response_q);
563 msleep(1);
Steve French5e1253b2005-10-10 14:06:37 -0700564 }
Steve French68058e72005-10-10 10:34:22 -0700565
566 return;
567}
Steve French68058e72005-10-10 10:34:22 -0700568
Steve Frenchbf97d282006-09-28 21:34:06 +0000569#ifdef CONFIG_CIFS_STATS2
570static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
571{
572 /* BB FIXME */
573 return 0;
574}
575#endif
576
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577static int cifs_remount(struct super_block *sb, int *flags, char *data)
578{
579 *flags |= MS_NODIRATIME;
580 return 0;
581}
582
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800583static const struct super_operations cifs_super_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 .put_super = cifs_put_super,
585 .statfs = cifs_statfs,
586 .alloc_inode = cifs_alloc_inode,
587 .destroy_inode = cifs_destroy_inode,
Steve French50c2f752007-07-13 00:33:32 +0000588/* .drop_inode = generic_delete_inode,
589 .delete_inode = cifs_delete_inode, */ /* Do not need above two
590 functions unless later we add lazy close of inodes or unless the
591 kernel forgets to call us with the same number of releases (closes)
592 as opens */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 .show_options = cifs_show_options,
Steve French7b7abfe2005-11-09 15:21:09 -0800594 .umount_begin = cifs_umount_begin,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 .remount_fs = cifs_remount,
Steve Frenchbf97d282006-09-28 21:34:06 +0000596#ifdef CONFIG_CIFS_STATS2
Steve Frenchf46d3e12006-09-30 01:08:55 +0000597 .show_stats = cifs_show_stats,
Steve Frenchbf97d282006-09-28 21:34:06 +0000598#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599};
600
David Howells454e2392006-06-23 02:02:57 -0700601static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602cifs_get_sb(struct file_system_type *fs_type,
David Howells454e2392006-06-23 02:02:57 -0700603 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604{
605 int rc;
606 struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
607
608 cFYI(1, ("Devname: %s flags: %d ", dev_name, flags));
609
610 if (IS_ERR(sb))
David Howells454e2392006-06-23 02:02:57 -0700611 return PTR_ERR(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
613 sb->s_flags = flags;
614
Theodore Ts'o9b04c992006-03-24 03:15:10 -0800615 rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 if (rc) {
Al Viro6f5bbff2009-05-06 01:34:22 -0400617 deactivate_locked_super(sb);
David Howells454e2392006-06-23 02:02:57 -0700618 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 }
620 sb->s_flags |= MS_ACTIVE;
Sukadev Bhattiprolua3ec9472009-03-04 12:06:34 -0800621 simple_set_mnt(mnt, sb);
622 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623}
624
Badari Pulavarty027445c2006-09-30 23:28:46 -0700625static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
626 unsigned long nr_segs, loff_t pos)
Steve French87c89dd2005-11-17 17:03:00 -0800627{
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800628 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
Steve French87c89dd2005-11-17 17:03:00 -0800629 ssize_t written;
630
Badari Pulavarty027445c2006-09-30 23:28:46 -0700631 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
Steve French87c89dd2005-11-17 17:03:00 -0800632 if (!CIFS_I(inode)->clientCanCacheAll)
633 filemap_fdatawrite(inode->i_mapping);
634 return written;
635}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
Steve Frenchc32a0b62006-01-12 14:41:28 -0800637static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
638{
639 /* origin == SEEK_END => we must revalidate the cached file length */
Steve French0889a942006-09-23 22:11:07 +0000640 if (origin == SEEK_END) {
Steve French030e9d82007-02-01 04:27:59 +0000641 int retval;
642
643 /* some applications poll for the file length in this strange
644 way so we must seek to end on non-oplocked files by
645 setting the revalidate time to zero */
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000646 CIFS_I(file->f_path.dentry->d_inode)->time = 0;
Steve French030e9d82007-02-01 04:27:59 +0000647
648 retval = cifs_revalidate(file->f_path.dentry);
Steve Frenchc32a0b62006-01-12 14:41:28 -0800649 if (retval < 0)
650 return (loff_t)retval;
651 }
Andi Kleen9465efc2008-06-27 11:05:24 +0200652 return generic_file_llseek_unlocked(file, offset, origin);
Steve Frenchc32a0b62006-01-12 14:41:28 -0800653}
654
Steve French84210e92008-10-23 04:42:37 +0000655#ifdef CONFIG_CIFS_EXPERIMENTAL
656static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
657{
658 /* note that this is called by vfs setlease with the BKL held
659 although I doubt that BKL is needed here in cifs */
660 struct inode *inode = file->f_path.dentry->d_inode;
661
662 if (!(S_ISREG(inode->i_mode)))
663 return -EINVAL;
664
665 /* check if file is oplocked */
666 if (((arg == F_RDLCK) &&
667 (CIFS_I(inode)->clientCanCacheRead)) ||
668 ((arg == F_WRLCK) &&
669 (CIFS_I(inode)->clientCanCacheAll)))
670 return generic_setlease(file, arg, lease);
671 else if (CIFS_SB(inode->i_sb)->tcon->local_lease &&
672 !CIFS_I(inode)->clientCanCacheRead)
673 /* If the server claims to support oplock on this
674 file, then we still need to check oplock even
675 if the local_lease mount option is set, but there
676 are servers which do not support oplock for which
677 this mount option may be useful if the user
678 knows that the file won't be changed on the server
679 by anyone else */
680 return generic_setlease(file, arg, lease);
681 else
682 return -EAGAIN;
683}
684#endif
685
Igor Mammedove6ab1582008-01-11 01:49:48 +0000686struct file_system_type cifs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 .owner = THIS_MODULE,
688 .name = "cifs",
689 .get_sb = cifs_get_sb,
690 .kill_sb = kill_anon_super,
691 /* .fs_flags */
692};
Arjan van de Ven754661f2007-02-12 00:55:38 -0800693const struct inode_operations cifs_dir_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 .create = cifs_create,
695 .lookup = cifs_lookup,
696 .getattr = cifs_getattr,
697 .unlink = cifs_unlink,
698 .link = cifs_hardlink,
699 .mkdir = cifs_mkdir,
700 .rmdir = cifs_rmdir,
701 .rename = cifs_rename,
702 .permission = cifs_permission,
703/* revalidate:cifs_revalidate, */
704 .setattr = cifs_setattr,
705 .symlink = cifs_symlink,
706 .mknod = cifs_mknod,
707#ifdef CONFIG_CIFS_XATTR
708 .setxattr = cifs_setxattr,
709 .getxattr = cifs_getxattr,
710 .listxattr = cifs_listxattr,
711 .removexattr = cifs_removexattr,
712#endif
713};
714
Arjan van de Ven754661f2007-02-12 00:55:38 -0800715const struct inode_operations cifs_file_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716/* revalidate:cifs_revalidate, */
717 .setattr = cifs_setattr,
718 .getattr = cifs_getattr, /* do we need this anymore? */
719 .rename = cifs_rename,
720 .permission = cifs_permission,
721#ifdef CONFIG_CIFS_XATTR
722 .setxattr = cifs_setxattr,
723 .getxattr = cifs_getxattr,
724 .listxattr = cifs_listxattr,
725 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000726#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727};
728
Arjan van de Ven754661f2007-02-12 00:55:38 -0800729const struct inode_operations cifs_symlink_inode_ops = {
Steve French50c2f752007-07-13 00:33:32 +0000730 .readlink = generic_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 .follow_link = cifs_follow_link,
732 .put_link = cifs_put_link,
733 .permission = cifs_permission,
734 /* BB add the following two eventually */
735 /* revalidate: cifs_revalidate,
736 setattr: cifs_notify_change, *//* BB do we need notify change */
737#ifdef CONFIG_CIFS_XATTR
738 .setxattr = cifs_setxattr,
739 .getxattr = cifs_getxattr,
740 .listxattr = cifs_listxattr,
741 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000742#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743};
744
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800745const struct file_operations cifs_file_ops = {
Steve French87c89dd2005-11-17 17:03:00 -0800746 .read = do_sync_read,
747 .write = do_sync_write,
Steve French87c89dd2005-11-17 17:03:00 -0800748 .aio_read = generic_file_aio_read,
749 .aio_write = cifs_file_aio_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 .open = cifs_open,
751 .release = cifs_close,
752 .lock = cifs_lock,
753 .fsync = cifs_fsync,
754 .flush = cifs_flush,
755 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200756 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800757 .llseek = cifs_llseek,
Steve Frenchc67593a2005-04-28 22:41:04 -0700758#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000759 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700760#endif /* CONFIG_CIFS_POSIX */
761
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762#ifdef CONFIG_CIFS_EXPERIMENTAL
Steve French84210e92008-10-23 04:42:37 +0000763 .setlease = cifs_setlease,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764#endif /* CONFIG_CIFS_EXPERIMENTAL */
765};
766
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800767const struct file_operations cifs_file_direct_ops = {
Steve French50c2f752007-07-13 00:33:32 +0000768 /* no mmap, no aio, no readv -
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 BB reevaluate whether they can be done with directio, no cache */
770 .read = cifs_user_read,
771 .write = cifs_user_write,
772 .open = cifs_open,
773 .release = cifs_close,
774 .lock = cifs_lock,
775 .fsync = cifs_fsync,
776 .flush = cifs_flush,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200777 .splice_read = generic_file_splice_read,
Steve Frenchc67593a2005-04-28 22:41:04 -0700778#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000779 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700780#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -0800781 .llseek = cifs_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782#ifdef CONFIG_CIFS_EXPERIMENTAL
Steve French84210e92008-10-23 04:42:37 +0000783 .setlease = cifs_setlease,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784#endif /* CONFIG_CIFS_EXPERIMENTAL */
785};
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800786const struct file_operations cifs_file_nobrl_ops = {
Steve French87c89dd2005-11-17 17:03:00 -0800787 .read = do_sync_read,
788 .write = do_sync_write,
Steve French87c89dd2005-11-17 17:03:00 -0800789 .aio_read = generic_file_aio_read,
790 .aio_write = cifs_file_aio_write,
791 .open = cifs_open,
792 .release = cifs_close,
793 .fsync = cifs_fsync,
794 .flush = cifs_flush,
795 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200796 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800797 .llseek = cifs_llseek,
Steve French8b94bcb2005-11-11 11:41:00 -0800798#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000799 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -0800800#endif /* CONFIG_CIFS_POSIX */
801
802#ifdef CONFIG_CIFS_EXPERIMENTAL
Steve French84210e92008-10-23 04:42:37 +0000803 .setlease = cifs_setlease,
Steve French8b94bcb2005-11-11 11:41:00 -0800804#endif /* CONFIG_CIFS_EXPERIMENTAL */
805};
806
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800807const struct file_operations cifs_file_direct_nobrl_ops = {
Steve French50c2f752007-07-13 00:33:32 +0000808 /* no mmap, no aio, no readv -
Steve French87c89dd2005-11-17 17:03:00 -0800809 BB reevaluate whether they can be done with directio, no cache */
810 .read = cifs_user_read,
811 .write = cifs_user_write,
812 .open = cifs_open,
813 .release = cifs_close,
814 .fsync = cifs_fsync,
815 .flush = cifs_flush,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200816 .splice_read = generic_file_splice_read,
Steve French8b94bcb2005-11-11 11:41:00 -0800817#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000818 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -0800819#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -0800820 .llseek = cifs_llseek,
Steve French8b94bcb2005-11-11 11:41:00 -0800821#ifdef CONFIG_CIFS_EXPERIMENTAL
Steve French84210e92008-10-23 04:42:37 +0000822 .setlease = cifs_setlease,
Steve French8b94bcb2005-11-11 11:41:00 -0800823#endif /* CONFIG_CIFS_EXPERIMENTAL */
824};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800826const struct file_operations cifs_dir_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 .readdir = cifs_readdir,
828 .release = cifs_closedir,
829 .read = generic_read_dir,
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000830 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig3222a3e2008-09-03 21:53:01 +0200831 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832};
833
834static void
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700835cifs_init_once(void *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836{
837 struct cifsInodeInfo *cifsi = inode;
838
Christoph Lametera35afb82007-05-16 22:10:57 -0700839 inode_init_once(&cifsi->vfs_inode);
840 INIT_LIST_HEAD(&cifsi->lockList);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841}
842
843static int
844cifs_init_inodecache(void)
845{
846 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
Steve French26f57362007-08-30 22:09:15 +0000847 sizeof(struct cifsInodeInfo),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800848 0, (SLAB_RECLAIM_ACCOUNT|
849 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900850 cifs_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 if (cifs_inode_cachep == NULL)
852 return -ENOMEM;
853
854 return 0;
855}
856
857static void
858cifs_destroy_inodecache(void)
859{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700860 kmem_cache_destroy(cifs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861}
862
863static int
864cifs_init_request_bufs(void)
865{
Steve French4523cc32007-04-30 20:13:06 +0000866 if (CIFSMaxBufSize < 8192) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
868 Unicode path name has to fit in any SMB/CIFS path based frames */
869 CIFSMaxBufSize = 8192;
870 } else if (CIFSMaxBufSize > 1024*127) {
871 CIFSMaxBufSize = 1024 * 127;
872 } else {
873 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
874 }
875/* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */
876 cifs_req_cachep = kmem_cache_create("cifs_request",
877 CIFSMaxBufSize +
878 MAX_CIFS_HDR_SIZE, 0,
Paul Mundt20c2df82007-07-20 10:11:58 +0900879 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 if (cifs_req_cachep == NULL)
881 return -ENOMEM;
882
Steve French4523cc32007-04-30 20:13:06 +0000883 if (cifs_min_rcv < 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 cifs_min_rcv = 1;
885 else if (cifs_min_rcv > 64) {
886 cifs_min_rcv = 64;
Steve French50c2f752007-07-13 00:33:32 +0000887 cERROR(1, ("cifs_min_rcv set to maximum (64)"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 }
889
Matthew Dobson93d23412006-03-26 01:37:50 -0800890 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
891 cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892
Steve French4523cc32007-04-30 20:13:06 +0000893 if (cifs_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 kmem_cache_destroy(cifs_req_cachep);
895 return -ENOMEM;
896 }
Steve Frenchec637e32005-12-12 20:53:18 -0800897 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 almost all handle based requests (but not write response, nor is it
899 sufficient for path based requests). A smaller size would have
Steve French50c2f752007-07-13 00:33:32 +0000900 been more efficient (compacting multiple slab items on one 4k page)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 for the case in which debug was on, but this larger size allows
902 more SMBs to use small buffer alloc and is still much more
Steve French6dc0f872007-07-06 23:13:06 +0000903 efficient to alloc 1 per page off the slab compared to 17K (5page)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 alloc of large cifs buffers even when page debugging is on */
905 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
Steve French6dc0f872007-07-06 23:13:06 +0000906 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +0900907 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 if (cifs_sm_req_cachep == NULL) {
909 mempool_destroy(cifs_req_poolp);
910 kmem_cache_destroy(cifs_req_cachep);
Steve French6dc0f872007-07-06 23:13:06 +0000911 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 }
913
Steve French4523cc32007-04-30 20:13:06 +0000914 if (cifs_min_small < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 cifs_min_small = 2;
916 else if (cifs_min_small > 256) {
917 cifs_min_small = 256;
Steve French6dc0f872007-07-06 23:13:06 +0000918 cFYI(1, ("cifs_min_small set to maximum (256)"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 }
920
Matthew Dobson93d23412006-03-26 01:37:50 -0800921 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
922 cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923
Steve French4523cc32007-04-30 20:13:06 +0000924 if (cifs_sm_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 mempool_destroy(cifs_req_poolp);
926 kmem_cache_destroy(cifs_req_cachep);
927 kmem_cache_destroy(cifs_sm_req_cachep);
928 return -ENOMEM;
929 }
930
931 return 0;
932}
933
934static void
935cifs_destroy_request_bufs(void)
936{
937 mempool_destroy(cifs_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700938 kmem_cache_destroy(cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 mempool_destroy(cifs_sm_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700940 kmem_cache_destroy(cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941}
942
943static int
944cifs_init_mids(void)
945{
946 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
Steve French26f57362007-08-30 22:09:15 +0000947 sizeof(struct mid_q_entry), 0,
948 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 if (cifs_mid_cachep == NULL)
950 return -ENOMEM;
951
Matthew Dobson93d23412006-03-26 01:37:50 -0800952 /* 3 is a reasonable minimum number of simultaneous operations */
953 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
Steve French4523cc32007-04-30 20:13:06 +0000954 if (cifs_mid_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 kmem_cache_destroy(cifs_mid_cachep);
956 return -ENOMEM;
957 }
958
959 cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs",
Steve French26f57362007-08-30 22:09:15 +0000960 sizeof(struct oplock_q_entry), 0,
961 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 if (cifs_oplock_cachep == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963 mempool_destroy(cifs_mid_poolp);
Akinobu Mitae6985c72007-06-04 16:14:59 +0000964 kmem_cache_destroy(cifs_mid_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 return -ENOMEM;
966 }
967
968 return 0;
969}
970
971static void
972cifs_destroy_mids(void)
973{
974 mempool_destroy(cifs_mid_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700975 kmem_cache_destroy(cifs_mid_cachep);
976 kmem_cache_destroy(cifs_oplock_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977}
978
Steve French50c2f752007-07-13 00:33:32 +0000979static int cifs_oplock_thread(void *dummyarg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980{
Steve French6dc0f872007-07-06 23:13:06 +0000981 struct oplock_q_entry *oplock_item;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 struct cifsTconInfo *pTcon;
Steve French6dc0f872007-07-06 23:13:06 +0000983 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 __u16 netfid;
Jeff Laytoncea21802007-11-20 23:19:03 +0000985 int rc, waitrc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700987 set_freezable();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 do {
Steve French6dc0f872007-07-06 23:13:06 +0000989 if (try_to_freeze())
Steve Frenchede13272005-08-30 20:10:14 -0700990 continue;
Steve French50c2f752007-07-13 00:33:32 +0000991
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 spin_lock(&GlobalMid_Lock);
Steve French4523cc32007-04-30 20:13:06 +0000993 if (list_empty(&GlobalOplock_Q)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 spin_unlock(&GlobalMid_Lock);
995 set_current_state(TASK_INTERRUPTIBLE);
996 schedule_timeout(39*HZ);
997 } else {
Steve French6dc0f872007-07-06 23:13:06 +0000998 oplock_item = list_entry(GlobalOplock_Q.next,
Steve Frenchad8b15f2008-08-08 21:10:16 +0000999 struct oplock_q_entry, qhead);
1000 cFYI(1, ("found oplock item to write out"));
1001 pTcon = oplock_item->tcon;
1002 inode = oplock_item->pinode;
1003 netfid = oplock_item->netfid;
1004 spin_unlock(&GlobalMid_Lock);
1005 DeleteOplockQEntry(oplock_item);
1006 /* can not grab inode sem here since it would
Steve French6dc0f872007-07-06 23:13:06 +00001007 deadlock when oplock received on delete
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08001008 since vfs_unlink holds the i_mutex across
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 the call */
Steve Frenchad8b15f2008-08-08 21:10:16 +00001010 /* mutex_lock(&inode->i_mutex);*/
1011 if (S_ISREG(inode->i_mode)) {
Steve French84210e92008-10-23 04:42:37 +00001012#ifdef CONFIG_CIFS_EXPERIMENTAL
1013 if (CIFS_I(inode)->clientCanCacheAll == 0)
1014 break_lease(inode, FMODE_READ);
1015 else if (CIFS_I(inode)->clientCanCacheRead == 0)
1016 break_lease(inode, FMODE_WRITE);
1017#endif
Steve Frenchad8b15f2008-08-08 21:10:16 +00001018 rc = filemap_fdatawrite(inode->i_mapping);
1019 if (CIFS_I(inode)->clientCanCacheRead == 0) {
1020 waitrc = filemap_fdatawait(
1021 inode->i_mapping);
1022 invalidate_remote_inode(inode);
1023 }
1024 if (rc == 0)
1025 rc = waitrc;
1026 } else
1027 rc = 0;
1028 /* mutex_unlock(&inode->i_mutex);*/
1029 if (rc)
1030 CIFS_I(inode)->write_behind_rc = rc;
1031 cFYI(1, ("Oplock flush inode %p rc %d",
1032 inode, rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
Steve French6dc0f872007-07-06 23:13:06 +00001034 /* releasing stale oplock after recent reconnect
1035 of smb session using a now incorrect file
1036 handle is not a data integrity issue but do
1037 not bother sending an oplock release if session
1038 to server still is disconnected since oplock
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 already released by the server in that case */
Steve French3b795212008-11-13 19:45:32 +00001040 if (!pTcon->need_reconnect) {
Steve Frenchad8b15f2008-08-08 21:10:16 +00001041 rc = CIFSSMBLock(0, pTcon, netfid,
1042 0 /* len */ , 0 /* offset */, 0,
1043 0, LOCKING_ANDX_OPLOCK_RELEASE,
1044 false /* wait flag */);
1045 cFYI(1, ("Oplock release rc = %d", rc));
1046 }
Steve French68058e72005-10-10 10:34:22 -07001047 set_current_state(TASK_INTERRUPTIBLE);
1048 schedule_timeout(1); /* yield in case q were corrupt */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 }
Steve French45af7a02006-04-21 22:52:25 +00001050 } while (!kthread_should_stop());
1051
1052 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053}
1054
1055static int __init
1056init_cifs(void)
1057{
1058 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 cifs_proc_init();
Jeff Laytone7ddee92008-11-14 13:44:38 -05001060 INIT_LIST_HEAD(&cifs_tcp_ses_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 INIT_LIST_HEAD(&GlobalOplock_Q);
Steve French4ca9c192005-10-10 19:52:13 -07001062#ifdef CONFIG_CIFS_EXPERIMENTAL
1063 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1064 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
Steve French6dc0f872007-07-06 23:13:06 +00001065#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066/*
1067 * Initialize Global counters
1068 */
1069 atomic_set(&sesInfoAllocCount, 0);
1070 atomic_set(&tconInfoAllocCount, 0);
Steve French6dc0f872007-07-06 23:13:06 +00001071 atomic_set(&tcpSesAllocCount, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 atomic_set(&tcpSesReconnectCount, 0);
1073 atomic_set(&tconInfoReconnectCount, 0);
1074
1075 atomic_set(&bufAllocCount, 0);
Steve French4498eed2005-12-03 13:58:57 -08001076 atomic_set(&smBufAllocCount, 0);
1077#ifdef CONFIG_CIFS_STATS2
1078 atomic_set(&totBufAllocCount, 0);
1079 atomic_set(&totSmBufAllocCount, 0);
1080#endif /* CONFIG_CIFS_STATS2 */
1081
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 atomic_set(&midCount, 0);
1083 GlobalCurrentXid = 0;
1084 GlobalTotalActiveXid = 0;
1085 GlobalMaxActiveXid = 0;
Steve French2cd646a2006-09-28 19:43:08 +00001086 memset(Local_System_Name, 0, 15);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 rwlock_init(&GlobalSMBSeslock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05001088 rwlock_init(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 spin_lock_init(&GlobalMid_Lock);
1090
Steve French4523cc32007-04-30 20:13:06 +00001091 if (cifs_max_pending < 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 cifs_max_pending = 2;
Steve French6dc0f872007-07-06 23:13:06 +00001093 cFYI(1, ("cifs_max_pending set to min of 2"));
Steve French4523cc32007-04-30 20:13:06 +00001094 } else if (cifs_max_pending > 256) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 cifs_max_pending = 256;
Steve French6dc0f872007-07-06 23:13:06 +00001096 cFYI(1, ("cifs_max_pending set to max of 256"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 }
1098
1099 rc = cifs_init_inodecache();
Steve French45af7a02006-04-21 22:52:25 +00001100 if (rc)
1101 goto out_clean_proc;
1102
1103 rc = cifs_init_mids();
1104 if (rc)
1105 goto out_destroy_inodecache;
1106
1107 rc = cifs_init_request_bufs();
1108 if (rc)
1109 goto out_destroy_mids;
1110
1111 rc = register_filesystem(&cifs_fs_type);
1112 if (rc)
1113 goto out_destroy_request_bufs;
Jeff Layton84a15b92007-11-03 05:02:24 +00001114#ifdef CONFIG_CIFS_UPCALL
1115 rc = register_key_type(&cifs_spnego_key_type);
1116 if (rc)
1117 goto out_unregister_filesystem;
1118#endif
Steve French61033352008-01-09 16:21:36 +00001119#ifdef CONFIG_CIFS_DFS_UPCALL
1120 rc = register_key_type(&key_type_dns_resolver);
1121 if (rc)
1122 goto out_unregister_key_type;
1123#endif
Steve French45af7a02006-04-21 22:52:25 +00001124 oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd");
1125 if (IS_ERR(oplockThread)) {
1126 rc = PTR_ERR(oplockThread);
Steve French6dc0f872007-07-06 23:13:06 +00001127 cERROR(1, ("error %d create oplock thread", rc));
Steve French61033352008-01-09 16:21:36 +00001128 goto out_unregister_dfs_key_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 }
Steve French45af7a02006-04-21 22:52:25 +00001130
Steve French45af7a02006-04-21 22:52:25 +00001131 return 0;
1132
Steve French61033352008-01-09 16:21:36 +00001133 out_unregister_dfs_key_type:
1134#ifdef CONFIG_CIFS_DFS_UPCALL
1135 unregister_key_type(&key_type_dns_resolver);
Jeff Layton84a15b92007-11-03 05:02:24 +00001136 out_unregister_key_type:
Steve French61033352008-01-09 16:21:36 +00001137#endif
Jeff Layton84a15b92007-11-03 05:02:24 +00001138#ifdef CONFIG_CIFS_UPCALL
1139 unregister_key_type(&cifs_spnego_key_type);
Steve French45af7a02006-04-21 22:52:25 +00001140 out_unregister_filesystem:
Jeff Layton84a15b92007-11-03 05:02:24 +00001141#endif
Steve French45af7a02006-04-21 22:52:25 +00001142 unregister_filesystem(&cifs_fs_type);
1143 out_destroy_request_bufs:
1144 cifs_destroy_request_bufs();
1145 out_destroy_mids:
1146 cifs_destroy_mids();
1147 out_destroy_inodecache:
1148 cifs_destroy_inodecache();
1149 out_clean_proc:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 return rc;
1152}
1153
1154static void __exit
1155exit_cifs(void)
1156{
Steve French90c81e02008-02-12 20:32:36 +00001157 cFYI(DBG2, ("exit_cifs"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 cifs_proc_clean();
Steve French61033352008-01-09 16:21:36 +00001159#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov78d31a32008-04-24 12:56:07 +04001160 cifs_dfs_release_automount_timer();
Steve French61033352008-01-09 16:21:36 +00001161 unregister_key_type(&key_type_dns_resolver);
1162#endif
Jeff Layton84a15b92007-11-03 05:02:24 +00001163#ifdef CONFIG_CIFS_UPCALL
1164 unregister_key_type(&cifs_spnego_key_type);
1165#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 unregister_filesystem(&cifs_fs_type);
1167 cifs_destroy_inodecache();
1168 cifs_destroy_mids();
1169 cifs_destroy_request_bufs();
Jeff Layton954d7a12008-12-01 15:23:50 -05001170 kthread_stop(oplockThread);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171}
1172
1173MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
Steve French6dc0f872007-07-06 23:13:06 +00001174MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175MODULE_DESCRIPTION
Steve French63135e02007-07-17 17:34:02 +00001176 ("VFS to access servers complying with the SNIA CIFS Specification "
1177 "e.g. Samba and Windows");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178MODULE_VERSION(CIFS_VERSION);
1179module_init(init_cifs)
1180module_exit(exit_cifs)