blob: 85c70d5969ac7f008c105e310f45a291d01d141b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/cifsfs.c
3 *
Steve French2b280fa2008-05-17 03:12:45 +00004 * Copyright (C) International Business Machines Corp., 2002,2008
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * Common Internet FileSystem (CIFS) client
8 *
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24/* Note that BB means BUGBUG (ie something to fix eventually) */
25
26#include <linux/module.h>
27#include <linux/fs.h>
28#include <linux/mount.h>
29#include <linux/slab.h>
30#include <linux/init.h>
31#include <linux/list.h>
32#include <linux/seq_file.h>
33#include <linux/vfs.h>
34#include <linux/mempool.h>
Steve French6ab16d22005-11-29 20:55:11 -080035#include <linux/delay.h>
Steve French45af7a02006-04-21 22:52:25 +000036#include <linux/kthread.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080037#include <linux/freezer.h>
Al Virofec11dd2011-07-18 13:50:40 -040038#include <linux/namei.h>
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -070039#include <linux/random.h>
Ben Greear3eb9a882010-09-01 17:06:02 -070040#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include "cifsfs.h"
42#include "cifspdu.h"
43#define DECLARE_GLOBALS_HERE
44#include "cifsglob.h"
45#include "cifsproto.h"
46#include "cifs_debug.h"
47#include "cifs_fs_sb.h"
48#include <linux/mm.h>
Jeff Layton84a15b92007-11-03 05:02:24 +000049#include <linux/key-type.h>
Jeff Laytone5459372007-11-03 05:11:06 +000050#include "cifs_spnego.h"
Suresh Jayaramanf579cf32010-07-05 18:11:50 +053051#include "fscache.h"
Pavel Shilovsky3792c172012-01-12 22:40:50 +040052#ifdef CONFIG_CIFS_SMB2
53#include "smb2pdu.h"
54#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Linus Torvalds1da177e2005-04-16 15:20:36 -070056int cifsFYI = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057int traceSMB = 0;
Steve Frenche7504732011-10-12 17:47:03 -050058bool enable_oplocks = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -070059unsigned int linuxExtEnabled = 1;
60unsigned int lookupCacheEnabled = 1;
Jeff Layton04912d62010-04-24 07:57:45 -040061unsigned int global_secflags = CIFSSEC_DEF;
Steve French39798772006-05-31 22:40:51 +000062/* unsigned int ntlmv2_support = 0; */
Linus Torvalds1da177e2005-04-16 15:20:36 -070063unsigned int sign_CIFS_PDUs = 1;
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -080064static const struct super_operations cifs_super_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070065unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
Jeff Layton60654ce2012-11-25 08:00:34 -050066module_param(CIFSMaxBufSize, uint, 0);
Steve French63135e02007-07-17 17:34:02 +000067MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). "
68 "Default: 16384 Range: 8192 to 130048");
Linus Torvalds1da177e2005-04-16 15:20:36 -070069unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL;
Jeff Layton60654ce2012-11-25 08:00:34 -050070module_param(cifs_min_rcv, uint, 0);
Steve French63135e02007-07-17 17:34:02 +000071MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: "
72 "1 to 64");
Linus Torvalds1da177e2005-04-16 15:20:36 -070073unsigned int cifs_min_small = 30;
Jeff Layton60654ce2012-11-25 08:00:34 -050074module_param(cifs_min_small, uint, 0);
Steve French63135e02007-07-17 17:34:02 +000075MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 "
76 "Range: 2 to 256");
Linus Torvalds1da177e2005-04-16 15:20:36 -070077unsigned int cifs_max_pending = CIFS_MAX_REQ;
Jeff Layton60654ce2012-11-25 08:00:34 -050078module_param(cifs_max_pending, uint, 0444);
Steve French63135e02007-07-17 17:34:02 +000079MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
Pavel Shilovsky10b9b982012-03-20 12:55:09 +030080 "Default: 32767 Range: 2 to 32767.");
Steve Frenche7504732011-10-12 17:47:03 -050081module_param(enable_oplocks, bool, 0644);
Jeff Layton60654ce2012-11-25 08:00:34 -050082MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1");
Steve Frenche7504732011-10-12 17:47:03 -050083
Linus Torvalds1da177e2005-04-16 15:20:36 -070084extern mempool_t *cifs_sm_req_poolp;
85extern mempool_t *cifs_req_poolp;
86extern mempool_t *cifs_mid_poolp;
87
Jeff Laytonda472fc2012-03-23 14:40:53 -040088struct workqueue_struct *cifsiod_wq;
89
Mateusz Guzik24261fc2013-03-08 16:30:03 +010090/*
91 * Bumps refcount for cifs super block.
92 * Note that it should be only called if a referece to VFS super block is
93 * already held, e.g. in open-type syscalls context. Otherwise it can race with
94 * atomic_dec_and_test in deactivate_locked_super.
95 */
96void
97cifs_sb_active(struct super_block *sb)
98{
99 struct cifs_sb_info *server = CIFS_SB(sb);
100
101 if (atomic_inc_return(&server->active) == 1)
102 atomic_inc(&sb->s_active);
103}
104
105void
106cifs_sb_deactive(struct super_block *sb)
107{
108 struct cifs_sb_info *server = CIFS_SB(sb);
109
110 if (atomic_dec_and_test(&server->active))
111 deactivate_super(sb);
112}
113
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114static int
Al Viro97d11522011-06-17 09:29:57 -0400115cifs_read_super(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116{
117 struct inode *inode;
Pavel Shilovskyb2e5cd32011-05-25 13:35:34 +0400118 struct cifs_sb_info *cifs_sb;
Jan Klos2f6c9472013-10-06 21:08:20 +0200119 struct cifs_tcon *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 int rc = 0;
Steve French50c2f752007-07-13 00:33:32 +0000121
Pavel Shilovskyb2e5cd32011-05-25 13:35:34 +0400122 cifs_sb = CIFS_SB(sb);
Jan Klos2f6c9472013-10-06 21:08:20 +0200123 tcon = cifs_sb_master_tcon(cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Al Viro2c6292a2011-06-17 09:05:48 -0400125 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
126 sb->s_flags |= MS_POSIXACL;
127
Jan Klos2f6c9472013-10-06 21:08:20 +0200128 if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files)
Al Viro2c6292a2011-06-17 09:05:48 -0400129 sb->s_maxbytes = MAX_LFS_FILESIZE;
130 else
131 sb->s_maxbytes = MAX_NON_LFS;
132
133 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
134 sb->s_time_gran = 100;
135
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 sb->s_magic = CIFS_MAGIC_NUMBER;
137 sb->s_op = &cifs_super_ops;
Jens Axboe8044f7f2010-04-22 12:09:48 +0200138 sb->s_bdi = &cifs_sb->bdi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 sb->s_blocksize = CIFS_MAX_MSGSIZE;
140 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
Shirish Pargaonkar9b6763e2011-02-21 23:56:59 -0600141 inode = cifs_root_iget(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
David Howellsce634ab2008-02-07 00:15:33 -0800143 if (IS_ERR(inode)) {
144 rc = PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 goto out_no_root;
146 }
147
Jan Klos2f6c9472013-10-06 21:08:20 +0200148 if (tcon->nocase)
Jeff Layton66ffd112013-07-30 11:38:44 -0400149 sb->s_d_op = &cifs_ci_dentry_ops;
150 else
151 sb->s_d_op = &cifs_dentry_ops;
152
Al Viro48fde702012-01-08 22:15:13 -0500153 sb->s_root = d_make_root(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 if (!sb->s_root) {
155 rc = -ENOMEM;
156 goto out_no_root;
157 }
Steve French50c2f752007-07-13 00:33:32 +0000158
Paul Bollef3a6a602011-10-12 14:14:04 +0200159#ifdef CONFIG_CIFS_NFSD_EXPORT
Steve French7521a3c2007-07-11 18:30:34 +0000160 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500161 cifs_dbg(FYI, "export ops supported\n");
Steve French7521a3c2007-07-11 18:30:34 +0000162 sb->s_export_op = &cifs_export_ops;
163 }
Paul Bollef3a6a602011-10-12 14:14:04 +0200164#endif /* CONFIG_CIFS_NFSD_EXPORT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
166 return 0;
167
168out_no_root:
Joe Perchesf96637b2013-05-04 22:12:25 -0500169 cifs_dbg(VFS, "%s: get root inode failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 return rc;
171}
172
Al Viro6d686172011-06-17 08:34:57 -0400173static void cifs_kill_sb(struct super_block *sb)
174{
175 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
176 kill_anon_super(sb);
Al Viro98ab4942011-06-17 09:32:10 -0400177 cifs_umount(cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178}
179
180static int
David Howells726c3342006-06-23 02:02:58 -0700181cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182{
David Howells726c3342006-06-23 02:02:58 -0700183 struct super_block *sb = dentry->d_sb;
Steve French39da9842008-04-28 04:04:34 +0000184 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French96daf2b2011-05-27 04:34:02 +0000185 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700186 struct TCP_Server_Info *server = tcon->ses->server;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400187 unsigned int xid;
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700188 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400190 xid = get_xid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Steve French39da9842008-04-28 04:04:34 +0000192 /*
193 * PATH_MAX may be too long - it would presumably be total path,
194 * but note that some servers (includinng Samba 3) have a shorter
195 * maximum path.
196 *
197 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
198 */
199 buf->f_namelen = PATH_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 buf->f_files = 0; /* undefined */
201 buf->f_ffree = 0; /* unlimited */
202
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700203 if (server->ops->queryfs)
204 rc = server->ops->queryfs(xid, tcon, buf);
Steve French39da9842008-04-28 04:04:34 +0000205
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400206 free_xid(xid);
Steve French39da9842008-04-28 04:04:34 +0000207 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208}
209
Al Viro10556cb2011-06-20 19:28:19 -0400210static int cifs_permission(struct inode *inode, int mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211{
212 struct cifs_sb_info *cifs_sb;
213
214 cifs_sb = CIFS_SB(inode->i_sb);
215
Miklos Szeredif696a362008-07-31 13:41:58 +0200216 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
217 if ((mask & MAY_EXEC) && !execute_ok(inode))
218 return -EACCES;
219 else
220 return 0;
221 } else /* file mode might have been restricted at mount time
Steve French50c2f752007-07-13 00:33:32 +0000222 on the client (above and beyond ACL on servers) for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 servers which do not support setting and viewing mode bits,
Steve French50c2f752007-07-13 00:33:32 +0000224 so allowing client to check permissions is useful */
Al Viro2830ba72011-06-20 19:16:29 -0400225 return generic_permission(inode, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226}
227
Christoph Lametere18b8902006-12-06 20:33:20 -0800228static struct kmem_cache *cifs_inode_cachep;
229static struct kmem_cache *cifs_req_cachep;
230static struct kmem_cache *cifs_mid_cachep;
Christoph Lametere18b8902006-12-06 20:33:20 -0800231static struct kmem_cache *cifs_sm_req_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232mempool_t *cifs_sm_req_poolp;
233mempool_t *cifs_req_poolp;
234mempool_t *cifs_mid_poolp;
235
236static struct inode *
237cifs_alloc_inode(struct super_block *sb)
238{
239 struct cifsInodeInfo *cifs_inode;
Christoph Lametere94b1762006-12-06 20:33:17 -0800240 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 if (!cifs_inode)
242 return NULL;
243 cifs_inode->cifsAttrs = 0x20; /* default */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 cifs_inode->time = 0;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700245 /*
246 * Until the file is open and we have gotten oplock info back from the
247 * server, can not assume caching of file data or metadata.
248 */
Pavel Shilovskyc6723622010-11-03 10:58:57 +0300249 cifs_set_oplock_level(cifs_inode, 0);
Jeff Laytonaff8d5c2014-04-30 09:31:45 -0400250 cifs_inode->flags = 0;
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000251 spin_lock_init(&cifs_inode->writers_lock);
252 cifs_inode->writers = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
Jeff Laytonfbec9ab2009-04-03 13:44:00 -0400254 cifs_inode->server_eof = 0;
Jeff Layton20054bd2011-01-07 11:30:27 -0500255 cifs_inode->uniqueid = 0;
256 cifs_inode->createtime = 0;
Pavel Shilovsky42873b02013-09-05 21:30:16 +0400257 cifs_inode->epoch = 0;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700258#ifdef CONFIG_CIFS_SMB2
259 get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE);
260#endif
261 /*
262 * Can not set i_flags here - they get immediately overwritten to zero
263 * by the VFS.
264 */
265 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 INIT_LIST_HEAD(&cifs_inode->openFileList);
Pavel Shilovskyf45d3412012-09-19 06:22:43 -0700267 INIT_LIST_HEAD(&cifs_inode->llist);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 return &cifs_inode->vfs_inode;
269}
270
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100271static void cifs_i_callback(struct rcu_head *head)
272{
273 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100274 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
275}
276
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277static void
278cifs_destroy_inode(struct inode *inode)
279{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100280 call_rcu(&inode->i_rcu, cifs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281}
282
Jeff Layton61f98ff2009-06-11 10:27:32 -0400283static void
Al Virob57922d2010-06-07 14:34:48 -0400284cifs_evict_inode(struct inode *inode)
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530285{
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700286 truncate_inode_pages_final(&inode->i_data);
Jan Karadbd57682012-05-03 14:48:02 +0200287 clear_inode(inode);
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530288 cifs_fscache_release_inode_cookie(inode);
289}
290
291static void
Jeff Layton61f98ff2009-06-11 10:27:32 -0400292cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
293{
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300294 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
295 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
296
Fabian Frederick571d5972014-05-13 18:04:17 +0200297 seq_puts(s, ",addr=");
Jeff Layton61f98ff2009-06-11 10:27:32 -0400298
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300299 switch (server->dstaddr.ss_family) {
Jeff Layton61f98ff2009-06-11 10:27:32 -0400300 case AF_INET:
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300301 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
Jeff Layton61f98ff2009-06-11 10:27:32 -0400302 break;
303 case AF_INET6:
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300304 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
305 if (sa6->sin6_scope_id)
306 seq_printf(s, "%%%u", sa6->sin6_scope_id);
Jeff Layton61f98ff2009-06-11 10:27:32 -0400307 break;
308 default:
Fabian Frederick571d5972014-05-13 18:04:17 +0200309 seq_puts(s, "(unknown)");
Jeff Layton61f98ff2009-06-11 10:27:32 -0400310 }
311}
312
Jeff Layton3e715512011-06-13 11:50:41 -0400313static void
Jeff Layton28e11bd2013-05-26 07:01:00 -0400314cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
Jeff Layton3e715512011-06-13 11:50:41 -0400315{
Jeff Layton28e11bd2013-05-26 07:01:00 -0400316 if (ses->sectype == Unspecified)
317 return;
318
Fabian Frederick571d5972014-05-13 18:04:17 +0200319 seq_puts(s, ",sec=");
Jeff Layton3e715512011-06-13 11:50:41 -0400320
Jeff Layton28e11bd2013-05-26 07:01:00 -0400321 switch (ses->sectype) {
Jeff Layton3e715512011-06-13 11:50:41 -0400322 case LANMAN:
Fabian Frederick571d5972014-05-13 18:04:17 +0200323 seq_puts(s, "lanman");
Jeff Layton3e715512011-06-13 11:50:41 -0400324 break;
325 case NTLMv2:
Fabian Frederick571d5972014-05-13 18:04:17 +0200326 seq_puts(s, "ntlmv2");
Jeff Layton3e715512011-06-13 11:50:41 -0400327 break;
328 case NTLM:
Fabian Frederick571d5972014-05-13 18:04:17 +0200329 seq_puts(s, "ntlm");
Jeff Layton3e715512011-06-13 11:50:41 -0400330 break;
331 case Kerberos:
Fabian Frederick571d5972014-05-13 18:04:17 +0200332 seq_puts(s, "krb5");
Jeff Layton3e715512011-06-13 11:50:41 -0400333 break;
334 case RawNTLMSSP:
Fabian Frederick571d5972014-05-13 18:04:17 +0200335 seq_puts(s, "ntlmssp");
Jeff Layton3e715512011-06-13 11:50:41 -0400336 break;
337 default:
338 /* shouldn't ever happen */
Fabian Frederick571d5972014-05-13 18:04:17 +0200339 seq_puts(s, "unknown");
Jeff Layton3e715512011-06-13 11:50:41 -0400340 break;
341 }
342
Jeff Layton28e11bd2013-05-26 07:01:00 -0400343 if (ses->sign)
Fabian Frederick571d5972014-05-13 18:04:17 +0200344 seq_puts(s, "i");
Jeff Layton3e715512011-06-13 11:50:41 -0400345}
346
Jeff Laytond06b5052012-05-16 07:53:01 -0400347static void
348cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
349{
Fabian Frederick571d5972014-05-13 18:04:17 +0200350 seq_puts(s, ",cache=");
Jeff Laytond06b5052012-05-16 07:53:01 -0400351
352 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
Fabian Frederick571d5972014-05-13 18:04:17 +0200353 seq_puts(s, "strict");
Jeff Laytond06b5052012-05-16 07:53:01 -0400354 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
Fabian Frederick571d5972014-05-13 18:04:17 +0200355 seq_puts(s, "none");
Jeff Laytond06b5052012-05-16 07:53:01 -0400356 else
Fabian Frederick571d5972014-05-13 18:04:17 +0200357 seq_puts(s, "loose");
Jeff Laytond06b5052012-05-16 07:53:01 -0400358}
359
Jeff Layton3ae35cd2013-07-30 13:34:40 -0400360static void
361cifs_show_nls(struct seq_file *s, struct nls_table *cur)
362{
363 struct nls_table *def;
364
365 /* Display iocharset= option if it's not default charset */
366 def = load_nls_default();
367 if (def != cur)
368 seq_printf(s, ",iocharset=%s", cur->charset);
369 unload_nls(def);
370}
371
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372/*
373 * cifs_show_options() is for displaying mount options in /proc/mounts.
374 * Not all settable options are displayed but most of the important
375 * ones are.
376 */
377static int
Al Viro34c80b12011-12-08 21:32:45 -0500378cifs_show_options(struct seq_file *s, struct dentry *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379{
Al Viro34c80b12011-12-08 21:32:45 -0500380 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
Steve French96daf2b2011-05-27 04:34:02 +0000381 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
Ben Greear3eb9a882010-09-01 17:06:02 -0700382 struct sockaddr *srcaddr;
383 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
Jeff Layton23db65f2012-05-15 12:20:51 -0400385 seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string);
Jeff Layton28e11bd2013-05-26 07:01:00 -0400386 cifs_show_security(s, tcon->ses);
Jeff Laytond06b5052012-05-16 07:53:01 -0400387 cifs_show_cache_flavor(s, cifs_sb);
Jeff Layton3e715512011-06-13 11:50:41 -0400388
Jeff Layton29e07c82010-09-29 19:51:12 -0400389 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
Fabian Frederick571d5972014-05-13 18:04:17 +0200390 seq_puts(s, ",multiuser");
Steve French8727c8a2011-02-25 01:11:56 -0600391 else if (tcon->ses->user_name)
392 seq_printf(s, ",username=%s", tcon->ses->user_name);
Jeff Layton29e07c82010-09-29 19:51:12 -0400393
Jeff Layton8616e0f2009-06-11 10:27:28 -0400394 if (tcon->ses->domainName)
395 seq_printf(s, ",domain=%s", tcon->ses->domainName);
396
Ben Greear3eb9a882010-09-01 17:06:02 -0700397 if (srcaddr->sa_family != AF_UNSPEC) {
398 struct sockaddr_in *saddr4;
399 struct sockaddr_in6 *saddr6;
400 saddr4 = (struct sockaddr_in *)srcaddr;
401 saddr6 = (struct sockaddr_in6 *)srcaddr;
402 if (srcaddr->sa_family == AF_INET6)
403 seq_printf(s, ",srcaddr=%pI6c",
404 &saddr6->sin6_addr);
405 else if (srcaddr->sa_family == AF_INET)
406 seq_printf(s, ",srcaddr=%pI4",
407 &saddr4->sin_addr.s_addr);
408 else
409 seq_printf(s, ",srcaddr=BAD-AF:%i",
410 (int)(srcaddr->sa_family));
411 }
412
Eric W. Biederman1f682332013-02-06 01:20:20 -0800413 seq_printf(s, ",uid=%u",
414 from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid));
Jeff Layton340481a32009-06-11 10:27:29 -0400415 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
Fabian Frederick571d5972014-05-13 18:04:17 +0200416 seq_puts(s, ",forceuid");
Jeff Layton4486d6e2009-08-03 12:45:10 -0400417 else
Fabian Frederick571d5972014-05-13 18:04:17 +0200418 seq_puts(s, ",noforceuid");
Jeff Layton340481a32009-06-11 10:27:29 -0400419
Eric W. Biederman1f682332013-02-06 01:20:20 -0800420 seq_printf(s, ",gid=%u",
421 from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid));
Jeff Layton340481a32009-06-11 10:27:29 -0400422 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
Fabian Frederick571d5972014-05-13 18:04:17 +0200423 seq_puts(s, ",forcegid");
Jeff Layton4486d6e2009-08-03 12:45:10 -0400424 else
Fabian Frederick571d5972014-05-13 18:04:17 +0200425 seq_puts(s, ",noforcegid");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400426
Jeff Layton61f98ff2009-06-11 10:27:32 -0400427 cifs_show_address(s, tcon->ses->server);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400428
429 if (!tcon->unix_ext)
Al Viro5206efd2011-07-26 03:22:14 -0400430 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
Steve French2b280fa2008-05-17 03:12:45 +0000431 cifs_sb->mnt_file_mode,
432 cifs_sb->mnt_dir_mode);
Jeff Layton3ae35cd2013-07-30 13:34:40 -0400433
434 cifs_show_nls(s, cifs_sb->local_nls);
435
Jeff Layton8616e0f2009-06-11 10:27:28 -0400436 if (tcon->seal)
Fabian Frederick571d5972014-05-13 18:04:17 +0200437 seq_puts(s, ",seal");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400438 if (tcon->nocase)
Fabian Frederick571d5972014-05-13 18:04:17 +0200439 seq_puts(s, ",nocase");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400440 if (tcon->retry)
Fabian Frederick571d5972014-05-13 18:04:17 +0200441 seq_puts(s, ",hard");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000442 if (tcon->unix_ext)
Fabian Frederick571d5972014-05-13 18:04:17 +0200443 seq_puts(s, ",unix");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000444 else
Fabian Frederick571d5972014-05-13 18:04:17 +0200445 seq_puts(s, ",nounix");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400446 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
Fabian Frederick571d5972014-05-13 18:04:17 +0200447 seq_puts(s, ",posixpaths");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400448 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
Fabian Frederick571d5972014-05-13 18:04:17 +0200449 seq_puts(s, ",setuids");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400450 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
Fabian Frederick571d5972014-05-13 18:04:17 +0200451 seq_puts(s, ",serverino");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000452 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
Fabian Frederick571d5972014-05-13 18:04:17 +0200453 seq_puts(s, ",rwpidforward");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000454 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200455 seq_puts(s, ",forcemand");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400456 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
Fabian Frederick571d5972014-05-13 18:04:17 +0200457 seq_puts(s, ",nouser_xattr");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400458 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
Fabian Frederick571d5972014-05-13 18:04:17 +0200459 seq_puts(s, ",mapchars");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400460 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200461 seq_puts(s, ",sfu");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400462 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200463 seq_puts(s, ",nobrl");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400464 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200465 seq_puts(s, ",cifsacl");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400466 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
Fabian Frederick571d5972014-05-13 18:04:17 +0200467 seq_puts(s, ",dynperm");
Al Viro34c80b12011-12-08 21:32:45 -0500468 if (root->d_sb->s_flags & MS_POSIXACL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200469 seq_puts(s, ",acl");
Stefan Metzmacher736a3322010-07-30 14:56:00 +0200470 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
Fabian Frederick571d5972014-05-13 18:04:17 +0200471 seq_puts(s, ",mfsymlinks");
Suresh Jayaraman476428f2010-11-24 17:49:07 +0530472 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
Fabian Frederick571d5972014-05-13 18:04:17 +0200473 seq_puts(s, ",fsc");
Steve French71c424b2011-10-19 20:44:48 -0500474 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
Fabian Frederick571d5972014-05-13 18:04:17 +0200475 seq_puts(s, ",nostrictsync");
Steve French71c424b2011-10-19 20:44:48 -0500476 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
Fabian Frederick571d5972014-05-13 18:04:17 +0200477 seq_puts(s, ",noperm");
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +0100478 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
Eric W. Biederman1f682332013-02-06 01:20:20 -0800479 seq_printf(s, ",backupuid=%u",
480 from_kuid_munged(&init_user_ns,
481 cifs_sb->mnt_backupuid));
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +0100482 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
Eric W. Biederman1f682332013-02-06 01:20:20 -0800483 seq_printf(s, ",backupgid=%u",
484 from_kgid_munged(&init_user_ns,
485 cifs_sb->mnt_backupgid));
Steve French2b280fa2008-05-17 03:12:45 +0000486
Sachin Prabhu28f88812012-04-24 15:28:30 +0100487 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
488 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
Suresh Jayaraman6d20e842010-12-01 14:42:28 +0530489 /* convert actimeo and display it in seconds */
Sachin Prabhu156d1792012-04-25 12:10:14 +0100490 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400491
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 return 0;
493}
494
Al Viro42faad92008-04-24 07:21:56 -0400495static void cifs_umount_begin(struct super_block *sb)
Steve French68058e72005-10-10 10:34:22 -0700496{
Al Viro42faad92008-04-24 07:21:56 -0400497 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French96daf2b2011-05-27 04:34:02 +0000498 struct cifs_tcon *tcon;
Steve French68058e72005-10-10 10:34:22 -0700499
Steve French4523cc32007-04-30 20:13:06 +0000500 if (cifs_sb == NULL)
Steve French9e2e85f2005-10-10 14:28:38 -0700501 return;
502
Jeff Layton0d424ad2010-09-20 16:01:35 -0700503 tcon = cifs_sb_master_tcon(cifs_sb);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500504
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530505 spin_lock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000506 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
507 /* we have other mounts to same share or we have
508 already tried to force umount this and woken up
509 all waiting network requests, nothing to do */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530510 spin_unlock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000511 return;
512 } else if (tcon->tc_count == 1)
Steve French5e1253b2005-10-10 14:06:37 -0700513 tcon->tidStatus = CifsExiting;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530514 spin_unlock(&cifs_tcp_ses_lock);
Steve French5e1253b2005-10-10 14:06:37 -0700515
Steve French3a5ff612006-07-14 22:37:11 +0000516 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
Steve French7b7abfe2005-11-09 15:21:09 -0800517 /* cancel_notify_requests(tcon); */
Steve French50c2f752007-07-13 00:33:32 +0000518 if (tcon->ses && tcon->ses->server) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500519 cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
Steve French9e2e85f2005-10-10 14:28:38 -0700520 wake_up_all(&tcon->ses->server->request_q);
Steve French6ab16d22005-11-29 20:55:11 -0800521 wake_up_all(&tcon->ses->server->response_q);
522 msleep(1); /* yield */
523 /* we have to kick the requests once more */
524 wake_up_all(&tcon->ses->server->response_q);
525 msleep(1);
Steve French5e1253b2005-10-10 14:06:37 -0700526 }
Steve French68058e72005-10-10 10:34:22 -0700527
528 return;
529}
Steve French68058e72005-10-10 10:34:22 -0700530
Steve Frenchbf97d282006-09-28 21:34:06 +0000531#ifdef CONFIG_CIFS_STATS2
Al Viro64132372011-12-08 20:51:13 -0500532static int cifs_show_stats(struct seq_file *s, struct dentry *root)
Steve Frenchbf97d282006-09-28 21:34:06 +0000533{
534 /* BB FIXME */
535 return 0;
536}
537#endif
538
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539static int cifs_remount(struct super_block *sb, int *flags, char *data)
540{
Theodore Ts'o02b99842014-03-13 10:14:33 -0400541 sync_filesystem(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 *flags |= MS_NODIRATIME;
543 return 0;
544}
545
Al Viro45321ac2010-06-07 13:43:19 -0400546static int cifs_drop_inode(struct inode *inode)
Jeff Layton12420ac2010-06-01 14:47:40 -0400547{
548 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
549
Al Viro45321ac2010-06-07 13:43:19 -0400550 /* no serverino => unconditional eviction */
551 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
552 generic_drop_inode(inode);
Jeff Layton12420ac2010-06-01 14:47:40 -0400553}
554
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800555static const struct super_operations cifs_super_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 .statfs = cifs_statfs,
557 .alloc_inode = cifs_alloc_inode,
558 .destroy_inode = cifs_destroy_inode,
Jeff Layton12420ac2010-06-01 14:47:40 -0400559 .drop_inode = cifs_drop_inode,
Al Virob57922d2010-06-07 14:34:48 -0400560 .evict_inode = cifs_evict_inode,
Jeff Layton12420ac2010-06-01 14:47:40 -0400561/* .delete_inode = cifs_delete_inode, */ /* Do not need above
562 function unless later we add lazy close of inodes or unless the
Steve French50c2f752007-07-13 00:33:32 +0000563 kernel forgets to call us with the same number of releases (closes)
564 as opens */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 .show_options = cifs_show_options,
Steve French7b7abfe2005-11-09 15:21:09 -0800566 .umount_begin = cifs_umount_begin,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 .remount_fs = cifs_remount,
Steve Frenchbf97d282006-09-28 21:34:06 +0000568#ifdef CONFIG_CIFS_STATS2
Steve Frenchf46d3e12006-09-30 01:08:55 +0000569 .show_stats = cifs_show_stats,
Steve Frenchbf97d282006-09-28 21:34:06 +0000570#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571};
572
Steve Frenchf87d39d2011-05-27 03:50:55 +0000573/*
574 * Get root dentry from superblock according to prefix path mount option.
575 * Return dentry with refcount + 1 on success and NULL otherwise.
576 */
577static struct dentry *
578cifs_get_root(struct smb_vol *vol, struct super_block *sb)
579{
Al Virofec11dd2011-07-18 13:50:40 -0400580 struct dentry *dentry;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000581 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Al Virofec11dd2011-07-18 13:50:40 -0400582 char *full_path = NULL;
583 char *s, *p;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000584 char sep;
585
Steve French6d3ea7e2012-11-28 22:34:41 -0600586 full_path = cifs_build_path_to_root(vol, cifs_sb,
587 cifs_sb_master_tcon(cifs_sb));
Steve Frenchf87d39d2011-05-27 03:50:55 +0000588 if (full_path == NULL)
Al Viro9403c9c2011-06-17 10:02:59 -0400589 return ERR_PTR(-ENOMEM);
Steve Frenchf87d39d2011-05-27 03:50:55 +0000590
Joe Perchesf96637b2013-05-04 22:12:25 -0500591 cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
Steve Frenchf87d39d2011-05-27 03:50:55 +0000592
Steve Frenchf87d39d2011-05-27 03:50:55 +0000593 sep = CIFS_DIR_SEP(cifs_sb);
Al Virofec11dd2011-07-18 13:50:40 -0400594 dentry = dget(sb->s_root);
595 p = s = full_path;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000596
Al Virofec11dd2011-07-18 13:50:40 -0400597 do {
598 struct inode *dir = dentry->d_inode;
599 struct dentry *child;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000600
Pavel Shilovsky5b980b02011-08-21 19:30:15 +0400601 if (!dir) {
602 dput(dentry);
603 dentry = ERR_PTR(-ENOENT);
604 break;
605 }
Jeff Laytonce2ac522013-02-01 15:11:01 -0500606 if (!S_ISDIR(dir->i_mode)) {
607 dput(dentry);
608 dentry = ERR_PTR(-ENOTDIR);
609 break;
610 }
Pavel Shilovsky5b980b02011-08-21 19:30:15 +0400611
Al Virofec11dd2011-07-18 13:50:40 -0400612 /* skip separators */
613 while (*s == sep)
614 s++;
615 if (!*s)
616 break;
617 p = s++;
618 /* next separator */
619 while (*s && *s != sep)
620 s++;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000621
Al Virofec11dd2011-07-18 13:50:40 -0400622 mutex_lock(&dir->i_mutex);
623 child = lookup_one_len(p, dentry, s - p);
624 mutex_unlock(&dir->i_mutex);
625 dput(dentry);
626 dentry = child;
627 } while (!IS_ERR(dentry));
Steve Frenchf87d39d2011-05-27 03:50:55 +0000628 kfree(full_path);
Al Virofec11dd2011-07-18 13:50:40 -0400629 return dentry;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000630}
631
Al Viroee01a142011-06-17 09:47:23 -0400632static int cifs_set_super(struct super_block *sb, void *data)
633{
634 struct cifs_mnt_data *mnt_data = data;
635 sb->s_fs_info = mnt_data->cifs_sb;
636 return set_anon_super(sb, NULL);
637}
638
Al Virod753ed92010-07-26 12:52:33 +0400639static struct dentry *
640cifs_do_mount(struct file_system_type *fs_type,
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000641 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642{
643 int rc;
Jan Blunckdb719222010-08-15 22:51:10 +0200644 struct super_block *sb;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000645 struct cifs_sb_info *cifs_sb;
646 struct smb_vol *volume_info;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400647 struct cifs_mnt_data mnt_data;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000648 struct dentry *root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
Joe Perchesf96637b2013-05-04 22:12:25 -0500650 cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651
Jeff Layton04db79b2011-07-06 08:10:38 -0400652 volume_info = cifs_get_volume_info((char *)data, dev_name);
653 if (IS_ERR(volume_info))
654 return ERR_CAST(volume_info);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000655
656 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
657 if (cifs_sb == NULL) {
658 root = ERR_PTR(-ENOMEM);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400659 goto out_nls;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000660 }
661
Al Viro5d3bc602011-06-17 09:17:28 -0400662 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
663 if (cifs_sb->mountdata == NULL) {
664 root = ERR_PTR(-ENOMEM);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400665 goto out_cifs_sb;
Al Viro5d3bc602011-06-17 09:17:28 -0400666 }
667
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000668 cifs_setup_cifs_sb(volume_info, cifs_sb);
669
Al Viro97d11522011-06-17 09:29:57 -0400670 rc = cifs_mount(cifs_sb, volume_info);
671 if (rc) {
672 if (!(flags & MS_SILENT))
Joe Perchesf96637b2013-05-04 22:12:25 -0500673 cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
674 rc);
Al Viro97d11522011-06-17 09:29:57 -0400675 root = ERR_PTR(rc);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400676 goto out_mountdata;
Al Viro97d11522011-06-17 09:29:57 -0400677 }
678
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400679 mnt_data.vol = volume_info;
680 mnt_data.cifs_sb = cifs_sb;
681 mnt_data.flags = flags;
682
David Howells9249e172012-06-25 12:55:37 +0100683 /* BB should we make this contingent on mount parm? */
684 flags |= MS_NODIRATIME | MS_NOATIME;
685
686 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000687 if (IS_ERR(sb)) {
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000688 root = ERR_CAST(sb);
Al Viro97d11522011-06-17 09:29:57 -0400689 cifs_umount(cifs_sb);
Al Virod757d712011-06-17 09:42:43 -0400690 goto out;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000691 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
Al Viroee01a142011-06-17 09:47:23 -0400693 if (sb->s_root) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500694 cifs_dbg(FYI, "Use existing superblock\n");
Al Viro97d11522011-06-17 09:29:57 -0400695 cifs_umount(cifs_sb);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400696 } else {
Al Viro5c4f1ad2011-06-17 09:56:55 -0400697 rc = cifs_read_super(sb);
698 if (rc) {
699 root = ERR_PTR(rc);
700 goto out_super;
701 }
702
703 sb->s_flags |= MS_ACTIVE;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400704 }
705
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400706 root = cifs_get_root(volume_info, sb);
Al Viro9403c9c2011-06-17 10:02:59 -0400707 if (IS_ERR(root))
Al Virofa18f1b2011-06-17 09:50:44 -0400708 goto out_super;
Al Virofa18f1b2011-06-17 09:50:44 -0400709
Joe Perchesf96637b2013-05-04 22:12:25 -0500710 cifs_dbg(FYI, "dentry root is: %p\n", root);
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400711 goto out;
712
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400713out_super:
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400714 deactivate_locked_super(sb);
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400715out:
Jeff Laytonf9e59bc2011-07-06 08:10:37 -0400716 cifs_cleanup_volume_info(volume_info);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000717 return root;
Al Viro5c4f1ad2011-06-17 09:56:55 -0400718
719out_mountdata:
720 kfree(cifs_sb->mountdata);
721out_cifs_sb:
722 kfree(cifs_sb);
723out_nls:
724 unload_nls(volume_info->local_nls);
725 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726}
727
Jeff Layton08bc0352014-05-23 06:50:21 -0400728static ssize_t
729cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
730{
731 ssize_t rc;
732 struct inode *inode = file_inode(iocb->ki_filp);
733
734 rc = cifs_revalidate_mapping(inode);
735 if (rc)
736 return rc;
737
738 return generic_file_read_iter(iocb, iter);
739}
740
Al Viro3dae8752014-04-03 12:05:17 -0400741static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
Steve French87c89dd2005-11-17 17:03:00 -0800742{
Al Viro496ad9a2013-01-23 17:07:38 -0500743 struct inode *inode = file_inode(iocb->ki_filp);
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000744 struct cifsInodeInfo *cinode = CIFS_I(inode);
Steve French87c89dd2005-11-17 17:03:00 -0800745 ssize_t written;
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500746 int rc;
Steve French87c89dd2005-11-17 17:03:00 -0800747
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000748 written = cifs_get_writer(cinode);
749 if (written)
750 return written;
751
Al Viro3dae8752014-04-03 12:05:17 -0400752 written = generic_file_write_iter(iocb, from);
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500753
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400754 if (CIFS_CACHE_WRITE(CIFS_I(inode)))
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000755 goto out;
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500756
757 rc = filemap_fdatawrite(inode->i_mapping);
758 if (rc)
Al Viro3dae8752014-04-03 12:05:17 -0400759 cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n",
Joe Perchesf96637b2013-05-04 22:12:25 -0500760 rc, inode);
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500761
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000762out:
763 cifs_put_writer(cinode);
Steve French87c89dd2005-11-17 17:03:00 -0800764 return written;
765}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766
Andrew Morton965c8e52012-12-17 15:59:39 -0800767static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
Steve Frenchc32a0b62006-01-12 14:41:28 -0800768{
Josef Bacik06222e42011-07-18 13:21:38 -0400769 /*
Andrew Morton965c8e52012-12-17 15:59:39 -0800770 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
Josef Bacik06222e42011-07-18 13:21:38 -0400771 * the cached file length
772 */
Andrew Morton965c8e52012-12-17 15:59:39 -0800773 if (whence != SEEK_SET && whence != SEEK_CUR) {
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400774 int rc;
Al Viro496ad9a2013-01-23 17:07:38 -0500775 struct inode *inode = file_inode(file);
Steve French030e9d82007-02-01 04:27:59 +0000776
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400777 /*
778 * We need to be sure that all dirty pages are written and the
779 * server has the newest file length.
780 */
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400781 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400782 inode->i_mapping->nrpages != 0) {
783 rc = filemap_fdatawait(inode->i_mapping);
Steve French156ecb22011-05-20 17:00:01 +0000784 if (rc) {
785 mapping_set_error(inode->i_mapping, rc);
786 return rc;
787 }
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400788 }
789 /*
790 * Some applications poll for the file length in this strange
791 * way so we must seek to end on non-oplocked files by
792 * setting the revalidate time to zero.
793 */
794 CIFS_I(inode)->time = 0;
Steve French030e9d82007-02-01 04:27:59 +0000795
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400796 rc = cifs_revalidate_file_attr(file);
797 if (rc < 0)
798 return (loff_t)rc;
Steve Frenchc32a0b62006-01-12 14:41:28 -0800799 }
Andrew Morton965c8e52012-12-17 15:59:39 -0800800 return generic_file_llseek(file, offset, whence);
Steve Frenchc32a0b62006-01-12 14:41:28 -0800801}
802
Jeff Laytone6f5c782014-08-22 10:40:25 -0400803static int
804cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv)
Steve French84210e92008-10-23 04:42:37 +0000805{
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400806 /*
807 * Note that this is called by vfs setlease with i_lock held to
808 * protect *lease from going away.
809 */
Al Viro496ad9a2013-01-23 17:07:38 -0500810 struct inode *inode = file_inode(file);
Jeff Laytonba00ba62010-09-20 16:01:31 -0700811 struct cifsFileInfo *cfile = file->private_data;
Steve French84210e92008-10-23 04:42:37 +0000812
813 if (!(S_ISREG(inode->i_mode)))
814 return -EINVAL;
815
816 /* check if file is oplocked */
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400817 if (((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
818 ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
Jeff Laytone6f5c782014-08-22 10:40:25 -0400819 return generic_setlease(file, arg, lease, priv);
Jeff Layton13cfb732010-09-29 19:51:11 -0400820 else if (tlink_tcon(cfile->tlink)->local_lease &&
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400821 !CIFS_CACHE_READ(CIFS_I(inode)))
822 /*
823 * If the server claims to support oplock on this file, then we
824 * still need to check oplock even if the local_lease mount
825 * option is set, but there are servers which do not support
826 * oplock for which this mount option may be useful if the user
827 * knows that the file won't be changed on the server by anyone
828 * else.
829 */
Jeff Laytone6f5c782014-08-22 10:40:25 -0400830 return generic_setlease(file, arg, lease, priv);
Christoph Hellwig51ee4b82010-10-31 08:35:10 -0400831 else
Steve French84210e92008-10-23 04:42:37 +0000832 return -EAGAIN;
833}
Steve French84210e92008-10-23 04:42:37 +0000834
Igor Mammedove6ab1582008-01-11 01:49:48 +0000835struct file_system_type cifs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 .owner = THIS_MODULE,
837 .name = "cifs",
Al Virod753ed92010-07-26 12:52:33 +0400838 .mount = cifs_do_mount,
Al Viro6d686172011-06-17 08:34:57 -0400839 .kill_sb = cifs_kill_sb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 /* .fs_flags */
841};
Eric W. Biederman3e64fe52013-03-11 07:05:42 -0700842MODULE_ALIAS_FS("cifs");
Arjan van de Ven754661f2007-02-12 00:55:38 -0800843const struct inode_operations cifs_dir_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 .create = cifs_create,
Miklos Szeredid2c12712012-06-05 15:10:23 +0200845 .atomic_open = cifs_atomic_open,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 .lookup = cifs_lookup,
847 .getattr = cifs_getattr,
848 .unlink = cifs_unlink,
849 .link = cifs_hardlink,
850 .mkdir = cifs_mkdir,
851 .rmdir = cifs_rmdir,
Miklos Szeredi7c33d592014-07-23 15:15:36 +0200852 .rename2 = cifs_rename2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 .permission = cifs_permission,
854/* revalidate:cifs_revalidate, */
855 .setattr = cifs_setattr,
856 .symlink = cifs_symlink,
857 .mknod = cifs_mknod,
858#ifdef CONFIG_CIFS_XATTR
859 .setxattr = cifs_setxattr,
860 .getxattr = cifs_getxattr,
861 .listxattr = cifs_listxattr,
862 .removexattr = cifs_removexattr,
863#endif
864};
865
Arjan van de Ven754661f2007-02-12 00:55:38 -0800866const struct inode_operations cifs_file_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867/* revalidate:cifs_revalidate, */
868 .setattr = cifs_setattr,
869 .getattr = cifs_getattr, /* do we need this anymore? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 .permission = cifs_permission,
871#ifdef CONFIG_CIFS_XATTR
872 .setxattr = cifs_setxattr,
873 .getxattr = cifs_getxattr,
874 .listxattr = cifs_listxattr,
875 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000876#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877};
878
Arjan van de Ven754661f2007-02-12 00:55:38 -0800879const struct inode_operations cifs_symlink_inode_ops = {
Steve French50c2f752007-07-13 00:33:32 +0000880 .readlink = generic_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 .follow_link = cifs_follow_link,
Al Viro87dc8002013-09-16 10:30:04 -0400882 .put_link = kfree_put_link,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 .permission = cifs_permission,
884 /* BB add the following two eventually */
885 /* revalidate: cifs_revalidate,
886 setattr: cifs_notify_change, *//* BB do we need notify change */
887#ifdef CONFIG_CIFS_XATTR
888 .setxattr = cifs_setxattr,
889 .getxattr = cifs_getxattr,
890 .listxattr = cifs_listxattr,
891 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000892#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893};
894
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800895const struct file_operations cifs_file_ops = {
Al Viroaad4f8b2014-04-02 14:33:16 -0400896 .read = new_sync_read,
Al Viro3dae8752014-04-03 12:05:17 -0400897 .write = new_sync_write,
Jeff Layton08bc0352014-05-23 06:50:21 -0400898 .read_iter = cifs_loose_read_iter,
Al Viro3dae8752014-04-03 12:05:17 -0400899 .write_iter = cifs_file_write_iter,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 .open = cifs_open,
901 .release = cifs_close,
902 .lock = cifs_lock,
903 .fsync = cifs_fsync,
904 .flush = cifs_flush,
905 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200906 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800907 .llseek = cifs_llseek,
Steve Frenchc67593a2005-04-28 22:41:04 -0700908#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000909 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700910#endif /* CONFIG_CIFS_POSIX */
Steve French84210e92008-10-23 04:42:37 +0000911 .setlease = cifs_setlease,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912};
913
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300914const struct file_operations cifs_file_strict_ops = {
Al Viroe6a7bcb2014-04-02 19:53:36 -0400915 .read = new_sync_read,
Al Viro3dae8752014-04-03 12:05:17 -0400916 .write = new_sync_write,
Al Viroe6a7bcb2014-04-02 19:53:36 -0400917 .read_iter = cifs_strict_readv,
Al Viro3dae8752014-04-03 12:05:17 -0400918 .write_iter = cifs_strict_writev,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300919 .open = cifs_open,
920 .release = cifs_close,
921 .lock = cifs_lock,
922 .fsync = cifs_strict_fsync,
923 .flush = cifs_flush,
Pavel Shilovsky7a6a19b2010-12-14 11:29:51 +0300924 .mmap = cifs_file_strict_mmap,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300925 .splice_read = generic_file_splice_read,
926 .llseek = cifs_llseek,
927#ifdef CONFIG_CIFS_POSIX
928 .unlocked_ioctl = cifs_ioctl,
929#endif /* CONFIG_CIFS_POSIX */
930 .setlease = cifs_setlease,
931};
932
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800933const struct file_operations cifs_file_direct_ops = {
Pavel Shilovsky0b81c1c2011-03-10 10:11:05 +0300934 /* BB reevaluate whether they can be done with directio, no cache */
Al Viroe6a7bcb2014-04-02 19:53:36 -0400935 .read = new_sync_read,
Al Viro3dae8752014-04-03 12:05:17 -0400936 .write = new_sync_write,
Al Viroe6a7bcb2014-04-02 19:53:36 -0400937 .read_iter = cifs_user_readv,
Al Viro3dae8752014-04-03 12:05:17 -0400938 .write_iter = cifs_user_writev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 .open = cifs_open,
940 .release = cifs_close,
941 .lock = cifs_lock,
942 .fsync = cifs_fsync,
943 .flush = cifs_flush,
Steve Frencha994b8f2009-12-07 05:44:46 +0000944 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200945 .splice_read = generic_file_splice_read,
Steve Frenchc67593a2005-04-28 22:41:04 -0700946#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000947 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700948#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -0800949 .llseek = cifs_llseek,
Steve French84210e92008-10-23 04:42:37 +0000950 .setlease = cifs_setlease,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951};
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300952
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800953const struct file_operations cifs_file_nobrl_ops = {
Al Viroaad4f8b2014-04-02 14:33:16 -0400954 .read = new_sync_read,
Al Viro3dae8752014-04-03 12:05:17 -0400955 .write = new_sync_write,
Jeff Layton08bc0352014-05-23 06:50:21 -0400956 .read_iter = cifs_loose_read_iter,
Al Viro3dae8752014-04-03 12:05:17 -0400957 .write_iter = cifs_file_write_iter,
Steve French87c89dd2005-11-17 17:03:00 -0800958 .open = cifs_open,
959 .release = cifs_close,
960 .fsync = cifs_fsync,
961 .flush = cifs_flush,
962 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200963 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800964 .llseek = cifs_llseek,
Steve French8b94bcb2005-11-11 11:41:00 -0800965#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000966 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -0800967#endif /* CONFIG_CIFS_POSIX */
Steve French84210e92008-10-23 04:42:37 +0000968 .setlease = cifs_setlease,
Steve French8b94bcb2005-11-11 11:41:00 -0800969};
970
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300971const struct file_operations cifs_file_strict_nobrl_ops = {
Al Viroe6a7bcb2014-04-02 19:53:36 -0400972 .read = new_sync_read,
Al Viro3dae8752014-04-03 12:05:17 -0400973 .write = new_sync_write,
Al Viroe6a7bcb2014-04-02 19:53:36 -0400974 .read_iter = cifs_strict_readv,
Al Viro3dae8752014-04-03 12:05:17 -0400975 .write_iter = cifs_strict_writev,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300976 .open = cifs_open,
977 .release = cifs_close,
978 .fsync = cifs_strict_fsync,
979 .flush = cifs_flush,
Pavel Shilovsky7a6a19b2010-12-14 11:29:51 +0300980 .mmap = cifs_file_strict_mmap,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300981 .splice_read = generic_file_splice_read,
982 .llseek = cifs_llseek,
983#ifdef CONFIG_CIFS_POSIX
984 .unlocked_ioctl = cifs_ioctl,
985#endif /* CONFIG_CIFS_POSIX */
986 .setlease = cifs_setlease,
987};
988
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800989const struct file_operations cifs_file_direct_nobrl_ops = {
Pavel Shilovsky0b81c1c2011-03-10 10:11:05 +0300990 /* BB reevaluate whether they can be done with directio, no cache */
Al Viroe6a7bcb2014-04-02 19:53:36 -0400991 .read = new_sync_read,
Al Viro3dae8752014-04-03 12:05:17 -0400992 .write = new_sync_write,
Al Viroe6a7bcb2014-04-02 19:53:36 -0400993 .read_iter = cifs_user_readv,
Al Viro3dae8752014-04-03 12:05:17 -0400994 .write_iter = cifs_user_writev,
Steve French87c89dd2005-11-17 17:03:00 -0800995 .open = cifs_open,
996 .release = cifs_close,
997 .fsync = cifs_fsync,
998 .flush = cifs_flush,
Pavel Shilovsky810627a02010-03-27 02:00:49 +0000999 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +02001000 .splice_read = generic_file_splice_read,
Steve French8b94bcb2005-11-11 11:41:00 -08001001#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +00001002 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -08001003#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -08001004 .llseek = cifs_llseek,
Steve French84210e92008-10-23 04:42:37 +00001005 .setlease = cifs_setlease,
Steve French8b94bcb2005-11-11 11:41:00 -08001006};
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -08001008const struct file_operations cifs_dir_ops = {
Al Virobe4ccdc2013-05-22 16:17:25 -04001009 .iterate = cifs_readdir,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 .release = cifs_closedir,
1011 .read = generic_read_dir,
Steve Frenchf9ddcca2008-05-15 05:51:55 +00001012 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig3222a3e2008-09-03 21:53:01 +02001013 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014};
1015
1016static void
Alexey Dobriyan51cc5062008-07-25 19:45:34 -07001017cifs_init_once(void *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018{
1019 struct cifsInodeInfo *cifsi = inode;
1020
Christoph Lametera35afb82007-05-16 22:10:57 -07001021 inode_init_once(&cifsi->vfs_inode);
Pavel Shilovsky1b4b55a2012-09-19 06:22:44 -07001022 init_rwsem(&cifsi->lock_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023}
1024
Fabian Frederick9ee108b2014-04-03 14:46:30 -07001025static int __init
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026cifs_init_inodecache(void)
1027{
1028 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
Steve French26f57362007-08-30 22:09:15 +00001029 sizeof(struct cifsInodeInfo),
Paul Jacksonfffb60f2006-03-24 03:16:06 -08001030 0, (SLAB_RECLAIM_ACCOUNT|
1031 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +09001032 cifs_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 if (cifs_inode_cachep == NULL)
1034 return -ENOMEM;
1035
1036 return 0;
1037}
1038
1039static void
1040cifs_destroy_inodecache(void)
1041{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +10001042 /*
1043 * Make sure all delayed rcu free inodes are flushed before we
1044 * destroy cache.
1045 */
1046 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001047 kmem_cache_destroy(cifs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048}
1049
1050static int
1051cifs_init_request_bufs(void)
1052{
Pavel Shilovsky3792c172012-01-12 22:40:50 +04001053 size_t max_hdr_size = MAX_CIFS_HDR_SIZE;
1054#ifdef CONFIG_CIFS_SMB2
1055 /*
1056 * SMB2 maximum header size is bigger than CIFS one - no problems to
1057 * allocate some more bytes for CIFS.
1058 */
1059 max_hdr_size = MAX_SMB2_HDR_SIZE;
1060#endif
Steve French4523cc32007-04-30 20:13:06 +00001061 if (CIFSMaxBufSize < 8192) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1063 Unicode path name has to fit in any SMB/CIFS path based frames */
1064 CIFSMaxBufSize = 8192;
1065 } else if (CIFSMaxBufSize > 1024*127) {
1066 CIFSMaxBufSize = 1024 * 127;
1067 } else {
1068 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1069 }
Joe Perchesf96637b2013-05-04 22:12:25 -05001070/*
1071 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
1072 CIFSMaxBufSize, CIFSMaxBufSize);
1073*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 cifs_req_cachep = kmem_cache_create("cifs_request",
Pavel Shilovsky3792c172012-01-12 22:40:50 +04001075 CIFSMaxBufSize + max_hdr_size, 0,
Paul Mundt20c2df82007-07-20 10:11:58 +09001076 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 if (cifs_req_cachep == NULL)
1078 return -ENOMEM;
1079
Steve French4523cc32007-04-30 20:13:06 +00001080 if (cifs_min_rcv < 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 cifs_min_rcv = 1;
1082 else if (cifs_min_rcv > 64) {
1083 cifs_min_rcv = 64;
Joe Perchesf96637b2013-05-04 22:12:25 -05001084 cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 }
1086
Matthew Dobson93d23412006-03-26 01:37:50 -08001087 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1088 cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089
Steve French4523cc32007-04-30 20:13:06 +00001090 if (cifs_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 kmem_cache_destroy(cifs_req_cachep);
1092 return -ENOMEM;
1093 }
Steve Frenchec637e32005-12-12 20:53:18 -08001094 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 almost all handle based requests (but not write response, nor is it
1096 sufficient for path based requests). A smaller size would have
Steve French50c2f752007-07-13 00:33:32 +00001097 been more efficient (compacting multiple slab items on one 4k page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 for the case in which debug was on, but this larger size allows
1099 more SMBs to use small buffer alloc and is still much more
Steve French6dc0f872007-07-06 23:13:06 +00001100 efficient to alloc 1 per page off the slab compared to 17K (5page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 alloc of large cifs buffers even when page debugging is on */
1102 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
Steve French6dc0f872007-07-06 23:13:06 +00001103 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +09001104 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 if (cifs_sm_req_cachep == NULL) {
1106 mempool_destroy(cifs_req_poolp);
1107 kmem_cache_destroy(cifs_req_cachep);
Steve French6dc0f872007-07-06 23:13:06 +00001108 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 }
1110
Steve French4523cc32007-04-30 20:13:06 +00001111 if (cifs_min_small < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 cifs_min_small = 2;
1113 else if (cifs_min_small > 256) {
1114 cifs_min_small = 256;
Joe Perchesf96637b2013-05-04 22:12:25 -05001115 cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 }
1117
Matthew Dobson93d23412006-03-26 01:37:50 -08001118 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1119 cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120
Steve French4523cc32007-04-30 20:13:06 +00001121 if (cifs_sm_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 mempool_destroy(cifs_req_poolp);
1123 kmem_cache_destroy(cifs_req_cachep);
1124 kmem_cache_destroy(cifs_sm_req_cachep);
1125 return -ENOMEM;
1126 }
1127
1128 return 0;
1129}
1130
1131static void
1132cifs_destroy_request_bufs(void)
1133{
1134 mempool_destroy(cifs_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001135 kmem_cache_destroy(cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 mempool_destroy(cifs_sm_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001137 kmem_cache_destroy(cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138}
1139
1140static int
1141cifs_init_mids(void)
1142{
1143 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
Steve French26f57362007-08-30 22:09:15 +00001144 sizeof(struct mid_q_entry), 0,
1145 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 if (cifs_mid_cachep == NULL)
1147 return -ENOMEM;
1148
Matthew Dobson93d23412006-03-26 01:37:50 -08001149 /* 3 is a reasonable minimum number of simultaneous operations */
1150 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
Steve French4523cc32007-04-30 20:13:06 +00001151 if (cifs_mid_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 kmem_cache_destroy(cifs_mid_cachep);
1153 return -ENOMEM;
1154 }
1155
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 return 0;
1157}
1158
1159static void
1160cifs_destroy_mids(void)
1161{
1162 mempool_destroy(cifs_mid_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001163 kmem_cache_destroy(cifs_mid_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164}
1165
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166static int __init
1167init_cifs(void)
1168{
1169 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 cifs_proc_init();
Jeff Laytone7ddee92008-11-14 13:44:38 -05001171 INIT_LIST_HEAD(&cifs_tcp_ses_list);
Steve French0eff0e22011-02-24 05:39:23 +00001172#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
Steve French4ca9c192005-10-10 19:52:13 -07001173 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1174 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
Steve French0eff0e22011-02-24 05:39:23 +00001175#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176/*
1177 * Initialize Global counters
1178 */
1179 atomic_set(&sesInfoAllocCount, 0);
1180 atomic_set(&tconInfoAllocCount, 0);
Steve French6dc0f872007-07-06 23:13:06 +00001181 atomic_set(&tcpSesAllocCount, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 atomic_set(&tcpSesReconnectCount, 0);
1183 atomic_set(&tconInfoReconnectCount, 0);
1184
1185 atomic_set(&bufAllocCount, 0);
Steve French4498eed52005-12-03 13:58:57 -08001186 atomic_set(&smBufAllocCount, 0);
1187#ifdef CONFIG_CIFS_STATS2
1188 atomic_set(&totBufAllocCount, 0);
1189 atomic_set(&totSmBufAllocCount, 0);
1190#endif /* CONFIG_CIFS_STATS2 */
1191
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 atomic_set(&midCount, 0);
1193 GlobalCurrentXid = 0;
1194 GlobalTotalActiveXid = 0;
1195 GlobalMaxActiveXid = 0;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301196 spin_lock_init(&cifs_tcp_ses_lock);
Jeff Layton44772882010-10-15 15:34:03 -04001197 spin_lock_init(&cifs_file_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 spin_lock_init(&GlobalMid_Lock);
1199
Steve French4523cc32007-04-30 20:13:06 +00001200 if (cifs_max_pending < 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 cifs_max_pending = 2;
Joe Perchesf96637b2013-05-04 22:12:25 -05001202 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
Pavel Shilovsky10b9b982012-03-20 12:55:09 +03001203 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1204 cifs_max_pending = CIFS_MAX_REQ;
Joe Perchesf96637b2013-05-04 22:12:25 -05001205 cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
1206 CIFS_MAX_REQ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 }
1208
Jeff Laytonda472fc2012-03-23 14:40:53 -04001209 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1210 if (!cifsiod_wq) {
1211 rc = -ENOMEM;
1212 goto out_clean_proc;
1213 }
1214
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301215 rc = cifs_fscache_register();
1216 if (rc)
Jeff Laytonda472fc2012-03-23 14:40:53 -04001217 goto out_destroy_wq;
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301218
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 rc = cifs_init_inodecache();
Steve French45af7a02006-04-21 22:52:25 +00001220 if (rc)
Steve Frenchd3bf5222010-09-22 19:15:36 +00001221 goto out_unreg_fscache;
Steve French45af7a02006-04-21 22:52:25 +00001222
1223 rc = cifs_init_mids();
1224 if (rc)
1225 goto out_destroy_inodecache;
1226
1227 rc = cifs_init_request_bufs();
1228 if (rc)
1229 goto out_destroy_mids;
1230
Jeff Layton84a15b92007-11-03 05:02:24 +00001231#ifdef CONFIG_CIFS_UPCALL
1232 rc = register_key_type(&cifs_spnego_key_type);
1233 if (rc)
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001234 goto out_destroy_request_bufs;
1235#endif /* CONFIG_CIFS_UPCALL */
1236
1237#ifdef CONFIG_CIFS_ACL
1238 rc = init_cifs_idmap();
1239 if (rc)
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001240 goto out_register_key_type;
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001241#endif /* CONFIG_CIFS_ACL */
1242
1243 rc = register_filesystem(&cifs_fs_type);
1244 if (rc)
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001245 goto out_init_cifs_idmap;
Steve French45af7a02006-04-21 22:52:25 +00001246
Steve French45af7a02006-04-21 22:52:25 +00001247 return 0;
1248
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001249out_init_cifs_idmap:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001250#ifdef CONFIG_CIFS_ACL
1251 exit_cifs_idmap();
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001252out_register_key_type:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001253#endif
1254#ifdef CONFIG_CIFS_UPCALL
1255 unregister_key_type(&cifs_spnego_key_type);
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001256out_destroy_request_bufs:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001257#endif
Steve French45af7a02006-04-21 22:52:25 +00001258 cifs_destroy_request_bufs();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001259out_destroy_mids:
Steve French45af7a02006-04-21 22:52:25 +00001260 cifs_destroy_mids();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001261out_destroy_inodecache:
Steve French45af7a02006-04-21 22:52:25 +00001262 cifs_destroy_inodecache();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001263out_unreg_fscache:
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301264 cifs_fscache_unregister();
Jeff Laytonda472fc2012-03-23 14:40:53 -04001265out_destroy_wq:
1266 destroy_workqueue(cifsiod_wq);
Steve Frenchd3bf5222010-09-22 19:15:36 +00001267out_clean_proc:
1268 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 return rc;
1270}
1271
1272static void __exit
1273exit_cifs(void)
1274{
Joe Perchesf96637b2013-05-04 22:12:25 -05001275 cifs_dbg(NOISY, "exit_cifs\n");
Jeff Layton3dd93302012-03-21 06:27:55 -04001276 unregister_filesystem(&cifs_fs_type);
Igor Mammedov78d31a32008-04-24 12:56:07 +04001277 cifs_dfs_release_automount_timer();
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001278#ifdef CONFIG_CIFS_ACL
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001279 exit_cifs_idmap();
1280#endif
Jeff Layton84a15b92007-11-03 05:02:24 +00001281#ifdef CONFIG_CIFS_UPCALL
1282 unregister_key_type(&cifs_spnego_key_type);
1283#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 cifs_destroy_request_bufs();
Jeff Layton3dd93302012-03-21 06:27:55 -04001285 cifs_destroy_mids();
1286 cifs_destroy_inodecache();
1287 cifs_fscache_unregister();
Jeff Laytonda472fc2012-03-23 14:40:53 -04001288 destroy_workqueue(cifsiod_wq);
Jeff Layton3dd93302012-03-21 06:27:55 -04001289 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290}
1291
1292MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
Steve French6dc0f872007-07-06 23:13:06 +00001293MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294MODULE_DESCRIPTION
Steve French63135e02007-07-17 17:34:02 +00001295 ("VFS to access servers complying with the SNIA CIFS Specification "
1296 "e.g. Samba and Windows");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297MODULE_VERSION(CIFS_VERSION);
1298module_init(init_cifs)
1299module_exit(exit_cifs)