blob: 44f30504b82d1bbe511da6d4def1342067359deb [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 Layton340481a32009-06-11 10:27:29 -0400377 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
378 seq_printf(s, ",forceuid");
379
Jeff Layton8616e0f2009-06-11 10:27:28 -0400380 seq_printf(s, ",gid=%d", cifs_sb->mnt_gid);
Jeff Layton340481a32009-06-11 10:27:29 -0400381 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
382 seq_printf(s, ",forcegid");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400383
Jeff Layton61f98ff2009-06-11 10:27:32 -0400384 cifs_show_address(s, tcon->ses->server);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400385
386 if (!tcon->unix_ext)
387 seq_printf(s, ",file_mode=0%o,dir_mode=0%o",
Steve French2b280fa2008-05-17 03:12:45 +0000388 cifs_sb->mnt_file_mode,
389 cifs_sb->mnt_dir_mode);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400390 if (tcon->seal)
391 seq_printf(s, ",seal");
392 if (tcon->nocase)
393 seq_printf(s, ",nocase");
394 if (tcon->retry)
395 seq_printf(s, ",hard");
396 if (cifs_sb->prepath)
397 seq_printf(s, ",prepath=%s", cifs_sb->prepath);
398 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
399 seq_printf(s, ",posixpaths");
400 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
401 seq_printf(s, ",setuids");
402 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
403 seq_printf(s, ",serverino");
404 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
405 seq_printf(s, ",directio");
406 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
407 seq_printf(s, ",nouser_xattr");
408 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
409 seq_printf(s, ",mapchars");
410 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
411 seq_printf(s, ",sfu");
412 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
413 seq_printf(s, ",nobrl");
414 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
415 seq_printf(s, ",cifsacl");
416 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
417 seq_printf(s, ",dynperm");
418 if (m->mnt_sb->s_flags & MS_POSIXACL)
419 seq_printf(s, ",acl");
Steve French2b280fa2008-05-17 03:12:45 +0000420
Jeff Layton8616e0f2009-06-11 10:27:28 -0400421 seq_printf(s, ",rsize=%d", cifs_sb->rsize);
422 seq_printf(s, ",wsize=%d", cifs_sb->wsize);
423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 return 0;
425}
426
427#ifdef CONFIG_CIFS_QUOTA
Steve French50c2f752007-07-13 00:33:32 +0000428int cifs_xquota_set(struct super_block *sb, int quota_type, qid_t qid,
429 struct fs_disk_quota *pdquota)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430{
431 int xid;
432 int rc = 0;
433 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
434 struct cifsTconInfo *pTcon;
Steve French50c2f752007-07-13 00:33:32 +0000435
Steve French4523cc32007-04-30 20:13:06 +0000436 if (cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 pTcon = cifs_sb->tcon;
438 else
439 return -EIO;
440
441
442 xid = GetXid();
Steve French4523cc32007-04-30 20:13:06 +0000443 if (pTcon) {
Steve French50c2f752007-07-13 00:33:32 +0000444 cFYI(1, ("set type: 0x%x id: %d", quota_type, qid));
Steve French61e74802008-12-03 00:57:54 +0000445 } else
Cyrill Gorcunov95ba7362007-08-24 00:23:36 +0000446 rc = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
448 FreeXid(xid);
449 return rc;
450}
451
Steve French50c2f752007-07-13 00:33:32 +0000452int cifs_xquota_get(struct super_block *sb, int quota_type, qid_t qid,
453 struct fs_disk_quota *pdquota)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454{
455 int xid;
456 int rc = 0;
457 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
458 struct cifsTconInfo *pTcon;
459
Steve French4523cc32007-04-30 20:13:06 +0000460 if (cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 pTcon = cifs_sb->tcon;
462 else
463 return -EIO;
464
465 xid = GetXid();
Steve French4523cc32007-04-30 20:13:06 +0000466 if (pTcon) {
Steve French50c2f752007-07-13 00:33:32 +0000467 cFYI(1, ("set type: 0x%x id: %d", quota_type, qid));
Steve French61e74802008-12-03 00:57:54 +0000468 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 rc = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
471 FreeXid(xid);
472 return rc;
473}
474
Steve French50c2f752007-07-13 00:33:32 +0000475int cifs_xstate_set(struct super_block *sb, unsigned int flags, int operation)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476{
Steve French50c2f752007-07-13 00:33:32 +0000477 int xid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 int rc = 0;
479 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
480 struct cifsTconInfo *pTcon;
481
Steve French4523cc32007-04-30 20:13:06 +0000482 if (cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 pTcon = cifs_sb->tcon;
484 else
485 return -EIO;
486
487 xid = GetXid();
Steve French4523cc32007-04-30 20:13:06 +0000488 if (pTcon) {
Steve French50c2f752007-07-13 00:33:32 +0000489 cFYI(1, ("flags: 0x%x operation: 0x%x", flags, operation));
Steve French61e74802008-12-03 00:57:54 +0000490 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 rc = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
493 FreeXid(xid);
494 return rc;
495}
496
Steve French50c2f752007-07-13 00:33:32 +0000497int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498{
499 int xid;
500 int rc = 0;
501 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
502 struct cifsTconInfo *pTcon;
503
Steve French61e74802008-12-03 00:57:54 +0000504 if (cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 pTcon = cifs_sb->tcon;
Steve French61e74802008-12-03 00:57:54 +0000506 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 return -EIO;
Steve French61e74802008-12-03 00:57:54 +0000508
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 xid = GetXid();
Steve French4523cc32007-04-30 20:13:06 +0000510 if (pTcon) {
Steve French50c2f752007-07-13 00:33:32 +0000511 cFYI(1, ("pqstats %p", qstats));
Steve French61e74802008-12-03 00:57:54 +0000512 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 rc = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514
515 FreeXid(xid);
516 return rc;
517}
518
519static struct quotactl_ops cifs_quotactl_ops = {
520 .set_xquota = cifs_xquota_set,
Roel Kluin6f7e8f32008-02-12 20:38:10 +0000521 .get_xquota = cifs_xquota_get,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 .set_xstate = cifs_xstate_set,
523 .get_xstate = cifs_xstate_get,
524};
525#endif
526
Al Viro42faad92008-04-24 07:21:56 -0400527static void cifs_umount_begin(struct super_block *sb)
Steve French68058e72005-10-10 10:34:22 -0700528{
Al Viro42faad92008-04-24 07:21:56 -0400529 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French50c2f752007-07-13 00:33:32 +0000530 struct cifsTconInfo *tcon;
Steve French68058e72005-10-10 10:34:22 -0700531
Steve French4523cc32007-04-30 20:13:06 +0000532 if (cifs_sb == NULL)
Steve French9e2e85f2005-10-10 14:28:38 -0700533 return;
534
535 tcon = cifs_sb->tcon;
Steve French4523cc32007-04-30 20:13:06 +0000536 if (tcon == NULL)
Steve French9e2e85f2005-10-10 14:28:38 -0700537 return;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500538
539 read_lock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000540 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
541 /* we have other mounts to same share or we have
542 already tried to force umount this and woken up
543 all waiting network requests, nothing to do */
544 read_unlock(&cifs_tcp_ses_lock);
545 return;
546 } else if (tcon->tc_count == 1)
Steve French5e1253b2005-10-10 14:06:37 -0700547 tcon->tidStatus = CifsExiting;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500548 read_unlock(&cifs_tcp_ses_lock);
Steve French5e1253b2005-10-10 14:06:37 -0700549
Steve French3a5ff612006-07-14 22:37:11 +0000550 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
Steve French7b7abfe2005-11-09 15:21:09 -0800551 /* cancel_notify_requests(tcon); */
Steve French50c2f752007-07-13 00:33:32 +0000552 if (tcon->ses && tcon->ses->server) {
553 cFYI(1, ("wake up tasks now - umount begin not complete"));
Steve French9e2e85f2005-10-10 14:28:38 -0700554 wake_up_all(&tcon->ses->server->request_q);
Steve French6ab16d22005-11-29 20:55:11 -0800555 wake_up_all(&tcon->ses->server->response_q);
556 msleep(1); /* yield */
557 /* we have to kick the requests once more */
558 wake_up_all(&tcon->ses->server->response_q);
559 msleep(1);
Steve French5e1253b2005-10-10 14:06:37 -0700560 }
Steve French68058e72005-10-10 10:34:22 -0700561
562 return;
563}
Steve French68058e72005-10-10 10:34:22 -0700564
Steve Frenchbf97d282006-09-28 21:34:06 +0000565#ifdef CONFIG_CIFS_STATS2
566static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt)
567{
568 /* BB FIXME */
569 return 0;
570}
571#endif
572
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573static int cifs_remount(struct super_block *sb, int *flags, char *data)
574{
575 *flags |= MS_NODIRATIME;
576 return 0;
577}
578
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800579static const struct super_operations cifs_super_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 .put_super = cifs_put_super,
581 .statfs = cifs_statfs,
582 .alloc_inode = cifs_alloc_inode,
583 .destroy_inode = cifs_destroy_inode,
Steve French50c2f752007-07-13 00:33:32 +0000584/* .drop_inode = generic_delete_inode,
585 .delete_inode = cifs_delete_inode, */ /* Do not need above two
586 functions unless later we add lazy close of inodes or unless the
587 kernel forgets to call us with the same number of releases (closes)
588 as opens */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 .show_options = cifs_show_options,
Steve French7b7abfe2005-11-09 15:21:09 -0800590 .umount_begin = cifs_umount_begin,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 .remount_fs = cifs_remount,
Steve Frenchbf97d282006-09-28 21:34:06 +0000592#ifdef CONFIG_CIFS_STATS2
Steve Frenchf46d3e12006-09-30 01:08:55 +0000593 .show_stats = cifs_show_stats,
Steve Frenchbf97d282006-09-28 21:34:06 +0000594#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595};
596
David Howells454e2392006-06-23 02:02:57 -0700597static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598cifs_get_sb(struct file_system_type *fs_type,
David Howells454e2392006-06-23 02:02:57 -0700599 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600{
601 int rc;
602 struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL);
603
604 cFYI(1, ("Devname: %s flags: %d ", dev_name, flags));
605
606 if (IS_ERR(sb))
David Howells454e2392006-06-23 02:02:57 -0700607 return PTR_ERR(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
609 sb->s_flags = flags;
610
Theodore Ts'o9b04c992006-03-24 03:15:10 -0800611 rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 if (rc) {
Al Viro6f5bbff2009-05-06 01:34:22 -0400613 deactivate_locked_super(sb);
David Howells454e2392006-06-23 02:02:57 -0700614 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 }
616 sb->s_flags |= MS_ACTIVE;
Sukadev Bhattiprolua3ec9472009-03-04 12:06:34 -0800617 simple_set_mnt(mnt, sb);
618 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619}
620
Badari Pulavarty027445c2006-09-30 23:28:46 -0700621static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
622 unsigned long nr_segs, loff_t pos)
Steve French87c89dd2005-11-17 17:03:00 -0800623{
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800624 struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode;
Steve French87c89dd2005-11-17 17:03:00 -0800625 ssize_t written;
626
Badari Pulavarty027445c2006-09-30 23:28:46 -0700627 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
Steve French87c89dd2005-11-17 17:03:00 -0800628 if (!CIFS_I(inode)->clientCanCacheAll)
629 filemap_fdatawrite(inode->i_mapping);
630 return written;
631}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
Steve Frenchc32a0b62006-01-12 14:41:28 -0800633static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
634{
635 /* origin == SEEK_END => we must revalidate the cached file length */
Steve French0889a942006-09-23 22:11:07 +0000636 if (origin == SEEK_END) {
Steve French030e9d82007-02-01 04:27:59 +0000637 int retval;
638
639 /* some applications poll for the file length in this strange
640 way so we must seek to end on non-oplocked files by
641 setting the revalidate time to zero */
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000642 CIFS_I(file->f_path.dentry->d_inode)->time = 0;
Steve French030e9d82007-02-01 04:27:59 +0000643
644 retval = cifs_revalidate(file->f_path.dentry);
Steve Frenchc32a0b62006-01-12 14:41:28 -0800645 if (retval < 0)
646 return (loff_t)retval;
647 }
Andi Kleen9465efc2008-06-27 11:05:24 +0200648 return generic_file_llseek_unlocked(file, offset, origin);
Steve Frenchc32a0b62006-01-12 14:41:28 -0800649}
650
Steve French84210e92008-10-23 04:42:37 +0000651#ifdef CONFIG_CIFS_EXPERIMENTAL
652static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
653{
654 /* note that this is called by vfs setlease with the BKL held
655 although I doubt that BKL is needed here in cifs */
656 struct inode *inode = file->f_path.dentry->d_inode;
657
658 if (!(S_ISREG(inode->i_mode)))
659 return -EINVAL;
660
661 /* check if file is oplocked */
662 if (((arg == F_RDLCK) &&
663 (CIFS_I(inode)->clientCanCacheRead)) ||
664 ((arg == F_WRLCK) &&
665 (CIFS_I(inode)->clientCanCacheAll)))
666 return generic_setlease(file, arg, lease);
667 else if (CIFS_SB(inode->i_sb)->tcon->local_lease &&
668 !CIFS_I(inode)->clientCanCacheRead)
669 /* If the server claims to support oplock on this
670 file, then we still need to check oplock even
671 if the local_lease mount option is set, but there
672 are servers which do not support oplock for which
673 this mount option may be useful if the user
674 knows that the file won't be changed on the server
675 by anyone else */
676 return generic_setlease(file, arg, lease);
677 else
678 return -EAGAIN;
679}
680#endif
681
Igor Mammedove6ab1582008-01-11 01:49:48 +0000682struct file_system_type cifs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 .owner = THIS_MODULE,
684 .name = "cifs",
685 .get_sb = cifs_get_sb,
686 .kill_sb = kill_anon_super,
687 /* .fs_flags */
688};
Arjan van de Ven754661f2007-02-12 00:55:38 -0800689const struct inode_operations cifs_dir_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 .create = cifs_create,
691 .lookup = cifs_lookup,
692 .getattr = cifs_getattr,
693 .unlink = cifs_unlink,
694 .link = cifs_hardlink,
695 .mkdir = cifs_mkdir,
696 .rmdir = cifs_rmdir,
697 .rename = cifs_rename,
698 .permission = cifs_permission,
699/* revalidate:cifs_revalidate, */
700 .setattr = cifs_setattr,
701 .symlink = cifs_symlink,
702 .mknod = cifs_mknod,
703#ifdef CONFIG_CIFS_XATTR
704 .setxattr = cifs_setxattr,
705 .getxattr = cifs_getxattr,
706 .listxattr = cifs_listxattr,
707 .removexattr = cifs_removexattr,
708#endif
709};
710
Arjan van de Ven754661f2007-02-12 00:55:38 -0800711const struct inode_operations cifs_file_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712/* revalidate:cifs_revalidate, */
713 .setattr = cifs_setattr,
714 .getattr = cifs_getattr, /* do we need this anymore? */
715 .rename = cifs_rename,
716 .permission = cifs_permission,
717#ifdef CONFIG_CIFS_XATTR
718 .setxattr = cifs_setxattr,
719 .getxattr = cifs_getxattr,
720 .listxattr = cifs_listxattr,
721 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000722#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723};
724
Arjan van de Ven754661f2007-02-12 00:55:38 -0800725const struct inode_operations cifs_symlink_inode_ops = {
Steve French50c2f752007-07-13 00:33:32 +0000726 .readlink = generic_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 .follow_link = cifs_follow_link,
728 .put_link = cifs_put_link,
729 .permission = cifs_permission,
730 /* BB add the following two eventually */
731 /* revalidate: cifs_revalidate,
732 setattr: cifs_notify_change, *//* BB do we need notify change */
733#ifdef CONFIG_CIFS_XATTR
734 .setxattr = cifs_setxattr,
735 .getxattr = cifs_getxattr,
736 .listxattr = cifs_listxattr,
737 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000738#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739};
740
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800741const struct file_operations cifs_file_ops = {
Steve French87c89dd2005-11-17 17:03:00 -0800742 .read = do_sync_read,
743 .write = do_sync_write,
Steve French87c89dd2005-11-17 17:03:00 -0800744 .aio_read = generic_file_aio_read,
745 .aio_write = cifs_file_aio_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 .open = cifs_open,
747 .release = cifs_close,
748 .lock = cifs_lock,
749 .fsync = cifs_fsync,
750 .flush = cifs_flush,
751 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200752 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800753 .llseek = cifs_llseek,
Steve Frenchc67593a2005-04-28 22:41:04 -0700754#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000755 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700756#endif /* CONFIG_CIFS_POSIX */
757
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758#ifdef CONFIG_CIFS_EXPERIMENTAL
Steve French84210e92008-10-23 04:42:37 +0000759 .setlease = cifs_setlease,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760#endif /* CONFIG_CIFS_EXPERIMENTAL */
761};
762
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800763const struct file_operations cifs_file_direct_ops = {
Steve French50c2f752007-07-13 00:33:32 +0000764 /* no mmap, no aio, no readv -
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 BB reevaluate whether they can be done with directio, no cache */
766 .read = cifs_user_read,
767 .write = cifs_user_write,
768 .open = cifs_open,
769 .release = cifs_close,
770 .lock = cifs_lock,
771 .fsync = cifs_fsync,
772 .flush = cifs_flush,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200773 .splice_read = generic_file_splice_read,
Steve Frenchc67593a2005-04-28 22:41:04 -0700774#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000775 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700776#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -0800777 .llseek = cifs_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778#ifdef CONFIG_CIFS_EXPERIMENTAL
Steve French84210e92008-10-23 04:42:37 +0000779 .setlease = cifs_setlease,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780#endif /* CONFIG_CIFS_EXPERIMENTAL */
781};
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800782const struct file_operations cifs_file_nobrl_ops = {
Steve French87c89dd2005-11-17 17:03:00 -0800783 .read = do_sync_read,
784 .write = do_sync_write,
Steve French87c89dd2005-11-17 17:03:00 -0800785 .aio_read = generic_file_aio_read,
786 .aio_write = cifs_file_aio_write,
787 .open = cifs_open,
788 .release = cifs_close,
789 .fsync = cifs_fsync,
790 .flush = cifs_flush,
791 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200792 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800793 .llseek = cifs_llseek,
Steve French8b94bcb2005-11-11 11:41:00 -0800794#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000795 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -0800796#endif /* CONFIG_CIFS_POSIX */
797
798#ifdef CONFIG_CIFS_EXPERIMENTAL
Steve French84210e92008-10-23 04:42:37 +0000799 .setlease = cifs_setlease,
Steve French8b94bcb2005-11-11 11:41:00 -0800800#endif /* CONFIG_CIFS_EXPERIMENTAL */
801};
802
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800803const struct file_operations cifs_file_direct_nobrl_ops = {
Steve French50c2f752007-07-13 00:33:32 +0000804 /* no mmap, no aio, no readv -
Steve French87c89dd2005-11-17 17:03:00 -0800805 BB reevaluate whether they can be done with directio, no cache */
806 .read = cifs_user_read,
807 .write = cifs_user_write,
808 .open = cifs_open,
809 .release = cifs_close,
810 .fsync = cifs_fsync,
811 .flush = cifs_flush,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200812 .splice_read = generic_file_splice_read,
Steve French8b94bcb2005-11-11 11:41:00 -0800813#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000814 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -0800815#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -0800816 .llseek = cifs_llseek,
Steve French8b94bcb2005-11-11 11:41:00 -0800817#ifdef CONFIG_CIFS_EXPERIMENTAL
Steve French84210e92008-10-23 04:42:37 +0000818 .setlease = cifs_setlease,
Steve French8b94bcb2005-11-11 11:41:00 -0800819#endif /* CONFIG_CIFS_EXPERIMENTAL */
820};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800822const struct file_operations cifs_dir_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 .readdir = cifs_readdir,
824 .release = cifs_closedir,
825 .read = generic_read_dir,
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000826 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig3222a3e2008-09-03 21:53:01 +0200827 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828};
829
830static void
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700831cifs_init_once(void *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832{
833 struct cifsInodeInfo *cifsi = inode;
834
Christoph Lametera35afb82007-05-16 22:10:57 -0700835 inode_init_once(&cifsi->vfs_inode);
836 INIT_LIST_HEAD(&cifsi->lockList);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837}
838
839static int
840cifs_init_inodecache(void)
841{
842 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
Steve French26f57362007-08-30 22:09:15 +0000843 sizeof(struct cifsInodeInfo),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800844 0, (SLAB_RECLAIM_ACCOUNT|
845 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900846 cifs_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 if (cifs_inode_cachep == NULL)
848 return -ENOMEM;
849
850 return 0;
851}
852
853static void
854cifs_destroy_inodecache(void)
855{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700856 kmem_cache_destroy(cifs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857}
858
859static int
860cifs_init_request_bufs(void)
861{
Steve French4523cc32007-04-30 20:13:06 +0000862 if (CIFSMaxBufSize < 8192) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
864 Unicode path name has to fit in any SMB/CIFS path based frames */
865 CIFSMaxBufSize = 8192;
866 } else if (CIFSMaxBufSize > 1024*127) {
867 CIFSMaxBufSize = 1024 * 127;
868 } else {
869 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
870 }
871/* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */
872 cifs_req_cachep = kmem_cache_create("cifs_request",
873 CIFSMaxBufSize +
874 MAX_CIFS_HDR_SIZE, 0,
Paul Mundt20c2df82007-07-20 10:11:58 +0900875 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 if (cifs_req_cachep == NULL)
877 return -ENOMEM;
878
Steve French4523cc32007-04-30 20:13:06 +0000879 if (cifs_min_rcv < 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 cifs_min_rcv = 1;
881 else if (cifs_min_rcv > 64) {
882 cifs_min_rcv = 64;
Steve French50c2f752007-07-13 00:33:32 +0000883 cERROR(1, ("cifs_min_rcv set to maximum (64)"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 }
885
Matthew Dobson93d23412006-03-26 01:37:50 -0800886 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
887 cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888
Steve French4523cc32007-04-30 20:13:06 +0000889 if (cifs_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 kmem_cache_destroy(cifs_req_cachep);
891 return -ENOMEM;
892 }
Steve Frenchec637e32005-12-12 20:53:18 -0800893 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 almost all handle based requests (but not write response, nor is it
895 sufficient for path based requests). A smaller size would have
Steve French50c2f752007-07-13 00:33:32 +0000896 been more efficient (compacting multiple slab items on one 4k page)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 for the case in which debug was on, but this larger size allows
898 more SMBs to use small buffer alloc and is still much more
Steve French6dc0f872007-07-06 23:13:06 +0000899 efficient to alloc 1 per page off the slab compared to 17K (5page)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 alloc of large cifs buffers even when page debugging is on */
901 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
Steve French6dc0f872007-07-06 23:13:06 +0000902 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +0900903 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 if (cifs_sm_req_cachep == NULL) {
905 mempool_destroy(cifs_req_poolp);
906 kmem_cache_destroy(cifs_req_cachep);
Steve French6dc0f872007-07-06 23:13:06 +0000907 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 }
909
Steve French4523cc32007-04-30 20:13:06 +0000910 if (cifs_min_small < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 cifs_min_small = 2;
912 else if (cifs_min_small > 256) {
913 cifs_min_small = 256;
Steve French6dc0f872007-07-06 23:13:06 +0000914 cFYI(1, ("cifs_min_small set to maximum (256)"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 }
916
Matthew Dobson93d23412006-03-26 01:37:50 -0800917 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
918 cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919
Steve French4523cc32007-04-30 20:13:06 +0000920 if (cifs_sm_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 mempool_destroy(cifs_req_poolp);
922 kmem_cache_destroy(cifs_req_cachep);
923 kmem_cache_destroy(cifs_sm_req_cachep);
924 return -ENOMEM;
925 }
926
927 return 0;
928}
929
930static void
931cifs_destroy_request_bufs(void)
932{
933 mempool_destroy(cifs_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700934 kmem_cache_destroy(cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 mempool_destroy(cifs_sm_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700936 kmem_cache_destroy(cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937}
938
939static int
940cifs_init_mids(void)
941{
942 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
Steve French26f57362007-08-30 22:09:15 +0000943 sizeof(struct mid_q_entry), 0,
944 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 if (cifs_mid_cachep == NULL)
946 return -ENOMEM;
947
Matthew Dobson93d23412006-03-26 01:37:50 -0800948 /* 3 is a reasonable minimum number of simultaneous operations */
949 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
Steve French4523cc32007-04-30 20:13:06 +0000950 if (cifs_mid_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 kmem_cache_destroy(cifs_mid_cachep);
952 return -ENOMEM;
953 }
954
955 cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs",
Steve French26f57362007-08-30 22:09:15 +0000956 sizeof(struct oplock_q_entry), 0,
957 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 if (cifs_oplock_cachep == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 mempool_destroy(cifs_mid_poolp);
Akinobu Mitae6985c72007-06-04 16:14:59 +0000960 kmem_cache_destroy(cifs_mid_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 return -ENOMEM;
962 }
963
964 return 0;
965}
966
967static void
968cifs_destroy_mids(void)
969{
970 mempool_destroy(cifs_mid_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -0700971 kmem_cache_destroy(cifs_mid_cachep);
972 kmem_cache_destroy(cifs_oplock_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973}
974
Steve French50c2f752007-07-13 00:33:32 +0000975static int cifs_oplock_thread(void *dummyarg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976{
Steve French6dc0f872007-07-06 23:13:06 +0000977 struct oplock_q_entry *oplock_item;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 struct cifsTconInfo *pTcon;
Steve French6dc0f872007-07-06 23:13:06 +0000979 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 __u16 netfid;
Jeff Laytoncea21802007-11-20 23:19:03 +0000981 int rc, waitrc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700983 set_freezable();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 do {
Steve French6dc0f872007-07-06 23:13:06 +0000985 if (try_to_freeze())
Steve Frenchede13272005-08-30 20:10:14 -0700986 continue;
Steve French50c2f752007-07-13 00:33:32 +0000987
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 spin_lock(&GlobalMid_Lock);
Steve French4523cc32007-04-30 20:13:06 +0000989 if (list_empty(&GlobalOplock_Q)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 spin_unlock(&GlobalMid_Lock);
991 set_current_state(TASK_INTERRUPTIBLE);
992 schedule_timeout(39*HZ);
993 } else {
Steve French6dc0f872007-07-06 23:13:06 +0000994 oplock_item = list_entry(GlobalOplock_Q.next,
Steve Frenchad8b15f2008-08-08 21:10:16 +0000995 struct oplock_q_entry, qhead);
996 cFYI(1, ("found oplock item to write out"));
997 pTcon = oplock_item->tcon;
998 inode = oplock_item->pinode;
999 netfid = oplock_item->netfid;
1000 spin_unlock(&GlobalMid_Lock);
1001 DeleteOplockQEntry(oplock_item);
1002 /* can not grab inode sem here since it would
Steve French6dc0f872007-07-06 23:13:06 +00001003 deadlock when oplock received on delete
Jes Sorensen1b1dcc12006-01-09 15:59:24 -08001004 since vfs_unlink holds the i_mutex across
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 the call */
Steve Frenchad8b15f2008-08-08 21:10:16 +00001006 /* mutex_lock(&inode->i_mutex);*/
1007 if (S_ISREG(inode->i_mode)) {
Steve French84210e92008-10-23 04:42:37 +00001008#ifdef CONFIG_CIFS_EXPERIMENTAL
1009 if (CIFS_I(inode)->clientCanCacheAll == 0)
1010 break_lease(inode, FMODE_READ);
1011 else if (CIFS_I(inode)->clientCanCacheRead == 0)
1012 break_lease(inode, FMODE_WRITE);
1013#endif
Steve Frenchad8b15f2008-08-08 21:10:16 +00001014 rc = filemap_fdatawrite(inode->i_mapping);
1015 if (CIFS_I(inode)->clientCanCacheRead == 0) {
1016 waitrc = filemap_fdatawait(
1017 inode->i_mapping);
1018 invalidate_remote_inode(inode);
1019 }
1020 if (rc == 0)
1021 rc = waitrc;
1022 } else
1023 rc = 0;
1024 /* mutex_unlock(&inode->i_mutex);*/
1025 if (rc)
1026 CIFS_I(inode)->write_behind_rc = rc;
1027 cFYI(1, ("Oplock flush inode %p rc %d",
1028 inode, rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
Steve French6dc0f872007-07-06 23:13:06 +00001030 /* releasing stale oplock after recent reconnect
1031 of smb session using a now incorrect file
1032 handle is not a data integrity issue but do
1033 not bother sending an oplock release if session
1034 to server still is disconnected since oplock
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 already released by the server in that case */
Steve French3b795212008-11-13 19:45:32 +00001036 if (!pTcon->need_reconnect) {
Steve Frenchad8b15f2008-08-08 21:10:16 +00001037 rc = CIFSSMBLock(0, pTcon, netfid,
1038 0 /* len */ , 0 /* offset */, 0,
1039 0, LOCKING_ANDX_OPLOCK_RELEASE,
1040 false /* wait flag */);
1041 cFYI(1, ("Oplock release rc = %d", rc));
1042 }
Steve French68058e72005-10-10 10:34:22 -07001043 set_current_state(TASK_INTERRUPTIBLE);
1044 schedule_timeout(1); /* yield in case q were corrupt */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 }
Steve French45af7a02006-04-21 22:52:25 +00001046 } while (!kthread_should_stop());
1047
1048 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049}
1050
1051static int __init
1052init_cifs(void)
1053{
1054 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055 cifs_proc_init();
Jeff Laytone7ddee92008-11-14 13:44:38 -05001056 INIT_LIST_HEAD(&cifs_tcp_ses_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 INIT_LIST_HEAD(&GlobalOplock_Q);
Steve French4ca9c192005-10-10 19:52:13 -07001058#ifdef CONFIG_CIFS_EXPERIMENTAL
1059 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1060 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
Steve French6dc0f872007-07-06 23:13:06 +00001061#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062/*
1063 * Initialize Global counters
1064 */
1065 atomic_set(&sesInfoAllocCount, 0);
1066 atomic_set(&tconInfoAllocCount, 0);
Steve French6dc0f872007-07-06 23:13:06 +00001067 atomic_set(&tcpSesAllocCount, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 atomic_set(&tcpSesReconnectCount, 0);
1069 atomic_set(&tconInfoReconnectCount, 0);
1070
1071 atomic_set(&bufAllocCount, 0);
Steve French4498eed52005-12-03 13:58:57 -08001072 atomic_set(&smBufAllocCount, 0);
1073#ifdef CONFIG_CIFS_STATS2
1074 atomic_set(&totBufAllocCount, 0);
1075 atomic_set(&totSmBufAllocCount, 0);
1076#endif /* CONFIG_CIFS_STATS2 */
1077
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 atomic_set(&midCount, 0);
1079 GlobalCurrentXid = 0;
1080 GlobalTotalActiveXid = 0;
1081 GlobalMaxActiveXid = 0;
Steve French2cd646a2006-09-28 19:43:08 +00001082 memset(Local_System_Name, 0, 15);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 rwlock_init(&GlobalSMBSeslock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05001084 rwlock_init(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 spin_lock_init(&GlobalMid_Lock);
1086
Steve French4523cc32007-04-30 20:13:06 +00001087 if (cifs_max_pending < 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 cifs_max_pending = 2;
Steve French6dc0f872007-07-06 23:13:06 +00001089 cFYI(1, ("cifs_max_pending set to min of 2"));
Steve French4523cc32007-04-30 20:13:06 +00001090 } else if (cifs_max_pending > 256) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 cifs_max_pending = 256;
Steve French6dc0f872007-07-06 23:13:06 +00001092 cFYI(1, ("cifs_max_pending set to max of 256"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 }
1094
1095 rc = cifs_init_inodecache();
Steve French45af7a02006-04-21 22:52:25 +00001096 if (rc)
1097 goto out_clean_proc;
1098
1099 rc = cifs_init_mids();
1100 if (rc)
1101 goto out_destroy_inodecache;
1102
1103 rc = cifs_init_request_bufs();
1104 if (rc)
1105 goto out_destroy_mids;
1106
1107 rc = register_filesystem(&cifs_fs_type);
1108 if (rc)
1109 goto out_destroy_request_bufs;
Jeff Layton84a15b92007-11-03 05:02:24 +00001110#ifdef CONFIG_CIFS_UPCALL
1111 rc = register_key_type(&cifs_spnego_key_type);
1112 if (rc)
1113 goto out_unregister_filesystem;
1114#endif
Steve French61033352008-01-09 16:21:36 +00001115#ifdef CONFIG_CIFS_DFS_UPCALL
1116 rc = register_key_type(&key_type_dns_resolver);
1117 if (rc)
1118 goto out_unregister_key_type;
1119#endif
Steve French45af7a02006-04-21 22:52:25 +00001120 oplockThread = kthread_run(cifs_oplock_thread, NULL, "cifsoplockd");
1121 if (IS_ERR(oplockThread)) {
1122 rc = PTR_ERR(oplockThread);
Steve French6dc0f872007-07-06 23:13:06 +00001123 cERROR(1, ("error %d create oplock thread", rc));
Steve French61033352008-01-09 16:21:36 +00001124 goto out_unregister_dfs_key_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 }
Steve French45af7a02006-04-21 22:52:25 +00001126
Steve French45af7a02006-04-21 22:52:25 +00001127 return 0;
1128
Steve French61033352008-01-09 16:21:36 +00001129 out_unregister_dfs_key_type:
1130#ifdef CONFIG_CIFS_DFS_UPCALL
1131 unregister_key_type(&key_type_dns_resolver);
Jeff Layton84a15b92007-11-03 05:02:24 +00001132 out_unregister_key_type:
Steve French61033352008-01-09 16:21:36 +00001133#endif
Jeff Layton84a15b92007-11-03 05:02:24 +00001134#ifdef CONFIG_CIFS_UPCALL
1135 unregister_key_type(&cifs_spnego_key_type);
Steve French45af7a02006-04-21 22:52:25 +00001136 out_unregister_filesystem:
Jeff Layton84a15b92007-11-03 05:02:24 +00001137#endif
Steve French45af7a02006-04-21 22:52:25 +00001138 unregister_filesystem(&cifs_fs_type);
1139 out_destroy_request_bufs:
1140 cifs_destroy_request_bufs();
1141 out_destroy_mids:
1142 cifs_destroy_mids();
1143 out_destroy_inodecache:
1144 cifs_destroy_inodecache();
1145 out_clean_proc:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 return rc;
1148}
1149
1150static void __exit
1151exit_cifs(void)
1152{
Steve French90c81e02008-02-12 20:32:36 +00001153 cFYI(DBG2, ("exit_cifs"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 cifs_proc_clean();
Steve French61033352008-01-09 16:21:36 +00001155#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov78d31a32008-04-24 12:56:07 +04001156 cifs_dfs_release_automount_timer();
Steve French61033352008-01-09 16:21:36 +00001157 unregister_key_type(&key_type_dns_resolver);
1158#endif
Jeff Layton84a15b92007-11-03 05:02:24 +00001159#ifdef CONFIG_CIFS_UPCALL
1160 unregister_key_type(&cifs_spnego_key_type);
1161#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 unregister_filesystem(&cifs_fs_type);
1163 cifs_destroy_inodecache();
1164 cifs_destroy_mids();
1165 cifs_destroy_request_bufs();
Jeff Layton954d7a12008-12-01 15:23:50 -05001166 kthread_stop(oplockThread);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167}
1168
1169MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
Steve French6dc0f872007-07-06 23:13:06 +00001170MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171MODULE_DESCRIPTION
Steve French63135e02007-07-17 17:34:02 +00001172 ("VFS to access servers complying with the SNIA CIFS Specification "
1173 "e.g. Samba and Windows");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174MODULE_VERSION(CIFS_VERSION);
1175module_init(init_cifs)
1176module_exit(exit_cifs)