blob: eaab4b2a05953225ea92075c95dd2e0174d3d75b [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
Steve French31742c52014-08-17 08:38:47 -0500210static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len)
211{
Al Viro7119e222014-10-22 00:25:12 -0400212 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
Steve French31742c52014-08-17 08:38:47 -0500213 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
214 struct TCP_Server_Info *server = tcon->ses->server;
215
216 if (server->ops->fallocate)
217 return server->ops->fallocate(file, tcon, mode, off, len);
218
219 return -EOPNOTSUPP;
220}
221
Al Viro10556cb2011-06-20 19:28:19 -0400222static int cifs_permission(struct inode *inode, int mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223{
224 struct cifs_sb_info *cifs_sb;
225
226 cifs_sb = CIFS_SB(inode->i_sb);
227
Miklos Szeredif696a362008-07-31 13:41:58 +0200228 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
229 if ((mask & MAY_EXEC) && !execute_ok(inode))
230 return -EACCES;
231 else
232 return 0;
233 } else /* file mode might have been restricted at mount time
Steve French50c2f752007-07-13 00:33:32 +0000234 on the client (above and beyond ACL on servers) for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 servers which do not support setting and viewing mode bits,
Steve French50c2f752007-07-13 00:33:32 +0000236 so allowing client to check permissions is useful */
Al Viro2830ba72011-06-20 19:16:29 -0400237 return generic_permission(inode, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238}
239
Christoph Lametere18b8902006-12-06 20:33:20 -0800240static struct kmem_cache *cifs_inode_cachep;
241static struct kmem_cache *cifs_req_cachep;
242static struct kmem_cache *cifs_mid_cachep;
Christoph Lametere18b8902006-12-06 20:33:20 -0800243static struct kmem_cache *cifs_sm_req_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244mempool_t *cifs_sm_req_poolp;
245mempool_t *cifs_req_poolp;
246mempool_t *cifs_mid_poolp;
247
248static struct inode *
249cifs_alloc_inode(struct super_block *sb)
250{
251 struct cifsInodeInfo *cifs_inode;
Christoph Lametere94b1762006-12-06 20:33:17 -0800252 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 if (!cifs_inode)
254 return NULL;
255 cifs_inode->cifsAttrs = 0x20; /* default */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 cifs_inode->time = 0;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700257 /*
258 * Until the file is open and we have gotten oplock info back from the
259 * server, can not assume caching of file data or metadata.
260 */
Pavel Shilovskyc6723622010-11-03 10:58:57 +0300261 cifs_set_oplock_level(cifs_inode, 0);
Jeff Laytonaff8d5c2014-04-30 09:31:45 -0400262 cifs_inode->flags = 0;
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000263 spin_lock_init(&cifs_inode->writers_lock);
264 cifs_inode->writers = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
Jeff Laytonfbec9ab2009-04-03 13:44:00 -0400266 cifs_inode->server_eof = 0;
Jeff Layton20054bd2011-01-07 11:30:27 -0500267 cifs_inode->uniqueid = 0;
268 cifs_inode->createtime = 0;
Pavel Shilovsky42873b02013-09-05 21:30:16 +0400269 cifs_inode->epoch = 0;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700270#ifdef CONFIG_CIFS_SMB2
271 get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE);
272#endif
273 /*
274 * Can not set i_flags here - they get immediately overwritten to zero
275 * by the VFS.
276 */
277 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 INIT_LIST_HEAD(&cifs_inode->openFileList);
Pavel Shilovskyf45d3412012-09-19 06:22:43 -0700279 INIT_LIST_HEAD(&cifs_inode->llist);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 return &cifs_inode->vfs_inode;
281}
282
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100283static void cifs_i_callback(struct rcu_head *head)
284{
285 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100286 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
287}
288
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289static void
290cifs_destroy_inode(struct inode *inode)
291{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100292 call_rcu(&inode->i_rcu, cifs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293}
294
Jeff Layton61f98ff2009-06-11 10:27:32 -0400295static void
Al Virob57922d2010-06-07 14:34:48 -0400296cifs_evict_inode(struct inode *inode)
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530297{
Johannes Weiner91b0abe2014-04-03 14:47:49 -0700298 truncate_inode_pages_final(&inode->i_data);
Jan Karadbd57682012-05-03 14:48:02 +0200299 clear_inode(inode);
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530300 cifs_fscache_release_inode_cookie(inode);
301}
302
303static void
Jeff Layton61f98ff2009-06-11 10:27:32 -0400304cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
305{
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300306 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
307 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
308
Fabian Frederick571d5972014-05-13 18:04:17 +0200309 seq_puts(s, ",addr=");
Jeff Layton61f98ff2009-06-11 10:27:32 -0400310
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300311 switch (server->dstaddr.ss_family) {
Jeff Layton61f98ff2009-06-11 10:27:32 -0400312 case AF_INET:
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300313 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
Jeff Layton61f98ff2009-06-11 10:27:32 -0400314 break;
315 case AF_INET6:
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300316 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
317 if (sa6->sin6_scope_id)
318 seq_printf(s, "%%%u", sa6->sin6_scope_id);
Jeff Layton61f98ff2009-06-11 10:27:32 -0400319 break;
320 default:
Fabian Frederick571d5972014-05-13 18:04:17 +0200321 seq_puts(s, "(unknown)");
Jeff Layton61f98ff2009-06-11 10:27:32 -0400322 }
323}
324
Jeff Layton3e715512011-06-13 11:50:41 -0400325static void
Jeff Layton28e11bd2013-05-26 07:01:00 -0400326cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
Jeff Layton3e715512011-06-13 11:50:41 -0400327{
Jeff Layton28e11bd2013-05-26 07:01:00 -0400328 if (ses->sectype == Unspecified)
329 return;
330
Fabian Frederick571d5972014-05-13 18:04:17 +0200331 seq_puts(s, ",sec=");
Jeff Layton3e715512011-06-13 11:50:41 -0400332
Jeff Layton28e11bd2013-05-26 07:01:00 -0400333 switch (ses->sectype) {
Jeff Layton3e715512011-06-13 11:50:41 -0400334 case LANMAN:
Fabian Frederick571d5972014-05-13 18:04:17 +0200335 seq_puts(s, "lanman");
Jeff Layton3e715512011-06-13 11:50:41 -0400336 break;
337 case NTLMv2:
Fabian Frederick571d5972014-05-13 18:04:17 +0200338 seq_puts(s, "ntlmv2");
Jeff Layton3e715512011-06-13 11:50:41 -0400339 break;
340 case NTLM:
Fabian Frederick571d5972014-05-13 18:04:17 +0200341 seq_puts(s, "ntlm");
Jeff Layton3e715512011-06-13 11:50:41 -0400342 break;
343 case Kerberos:
Fabian Frederick571d5972014-05-13 18:04:17 +0200344 seq_puts(s, "krb5");
Jeff Layton3e715512011-06-13 11:50:41 -0400345 break;
346 case RawNTLMSSP:
Fabian Frederick571d5972014-05-13 18:04:17 +0200347 seq_puts(s, "ntlmssp");
Jeff Layton3e715512011-06-13 11:50:41 -0400348 break;
349 default:
350 /* shouldn't ever happen */
Fabian Frederick571d5972014-05-13 18:04:17 +0200351 seq_puts(s, "unknown");
Jeff Layton3e715512011-06-13 11:50:41 -0400352 break;
353 }
354
Jeff Layton28e11bd2013-05-26 07:01:00 -0400355 if (ses->sign)
Fabian Frederick571d5972014-05-13 18:04:17 +0200356 seq_puts(s, "i");
Jeff Layton3e715512011-06-13 11:50:41 -0400357}
358
Jeff Laytond06b5052012-05-16 07:53:01 -0400359static void
360cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
361{
Fabian Frederick571d5972014-05-13 18:04:17 +0200362 seq_puts(s, ",cache=");
Jeff Laytond06b5052012-05-16 07:53:01 -0400363
364 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
Fabian Frederick571d5972014-05-13 18:04:17 +0200365 seq_puts(s, "strict");
Jeff Laytond06b5052012-05-16 07:53:01 -0400366 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
Fabian Frederick571d5972014-05-13 18:04:17 +0200367 seq_puts(s, "none");
Jeff Laytond06b5052012-05-16 07:53:01 -0400368 else
Fabian Frederick571d5972014-05-13 18:04:17 +0200369 seq_puts(s, "loose");
Jeff Laytond06b5052012-05-16 07:53:01 -0400370}
371
Jeff Layton3ae35cd2013-07-30 13:34:40 -0400372static void
373cifs_show_nls(struct seq_file *s, struct nls_table *cur)
374{
375 struct nls_table *def;
376
377 /* Display iocharset= option if it's not default charset */
378 def = load_nls_default();
379 if (def != cur)
380 seq_printf(s, ",iocharset=%s", cur->charset);
381 unload_nls(def);
382}
383
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384/*
385 * cifs_show_options() is for displaying mount options in /proc/mounts.
386 * Not all settable options are displayed but most of the important
387 * ones are.
388 */
389static int
Al Viro34c80b12011-12-08 21:32:45 -0500390cifs_show_options(struct seq_file *s, struct dentry *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391{
Al Viro34c80b12011-12-08 21:32:45 -0500392 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
Steve French96daf2b2011-05-27 04:34:02 +0000393 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
Ben Greear3eb9a882010-09-01 17:06:02 -0700394 struct sockaddr *srcaddr;
395 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
Jeff Layton23db65f2012-05-15 12:20:51 -0400397 seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string);
Jeff Layton28e11bd2013-05-26 07:01:00 -0400398 cifs_show_security(s, tcon->ses);
Jeff Laytond06b5052012-05-16 07:53:01 -0400399 cifs_show_cache_flavor(s, cifs_sb);
Jeff Layton3e715512011-06-13 11:50:41 -0400400
Jeff Layton29e07c82010-09-29 19:51:12 -0400401 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
Fabian Frederick571d5972014-05-13 18:04:17 +0200402 seq_puts(s, ",multiuser");
Steve French8727c8a2011-02-25 01:11:56 -0600403 else if (tcon->ses->user_name)
404 seq_printf(s, ",username=%s", tcon->ses->user_name);
Jeff Layton29e07c82010-09-29 19:51:12 -0400405
Jeff Layton8616e0f2009-06-11 10:27:28 -0400406 if (tcon->ses->domainName)
407 seq_printf(s, ",domain=%s", tcon->ses->domainName);
408
Ben Greear3eb9a882010-09-01 17:06:02 -0700409 if (srcaddr->sa_family != AF_UNSPEC) {
410 struct sockaddr_in *saddr4;
411 struct sockaddr_in6 *saddr6;
412 saddr4 = (struct sockaddr_in *)srcaddr;
413 saddr6 = (struct sockaddr_in6 *)srcaddr;
414 if (srcaddr->sa_family == AF_INET6)
415 seq_printf(s, ",srcaddr=%pI6c",
416 &saddr6->sin6_addr);
417 else if (srcaddr->sa_family == AF_INET)
418 seq_printf(s, ",srcaddr=%pI4",
419 &saddr4->sin_addr.s_addr);
420 else
421 seq_printf(s, ",srcaddr=BAD-AF:%i",
422 (int)(srcaddr->sa_family));
423 }
424
Eric W. Biederman1f682332013-02-06 01:20:20 -0800425 seq_printf(s, ",uid=%u",
426 from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid));
Jeff Layton340481a32009-06-11 10:27:29 -0400427 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
Fabian Frederick571d5972014-05-13 18:04:17 +0200428 seq_puts(s, ",forceuid");
Jeff Layton4486d6e2009-08-03 12:45:10 -0400429 else
Fabian Frederick571d5972014-05-13 18:04:17 +0200430 seq_puts(s, ",noforceuid");
Jeff Layton340481a32009-06-11 10:27:29 -0400431
Eric W. Biederman1f682332013-02-06 01:20:20 -0800432 seq_printf(s, ",gid=%u",
433 from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid));
Jeff Layton340481a32009-06-11 10:27:29 -0400434 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
Fabian Frederick571d5972014-05-13 18:04:17 +0200435 seq_puts(s, ",forcegid");
Jeff Layton4486d6e2009-08-03 12:45:10 -0400436 else
Fabian Frederick571d5972014-05-13 18:04:17 +0200437 seq_puts(s, ",noforcegid");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400438
Jeff Layton61f98ff2009-06-11 10:27:32 -0400439 cifs_show_address(s, tcon->ses->server);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400440
441 if (!tcon->unix_ext)
Al Viro5206efd2011-07-26 03:22:14 -0400442 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
Steve French2b280fa2008-05-17 03:12:45 +0000443 cifs_sb->mnt_file_mode,
444 cifs_sb->mnt_dir_mode);
Jeff Layton3ae35cd2013-07-30 13:34:40 -0400445
446 cifs_show_nls(s, cifs_sb->local_nls);
447
Jeff Layton8616e0f2009-06-11 10:27:28 -0400448 if (tcon->seal)
Fabian Frederick571d5972014-05-13 18:04:17 +0200449 seq_puts(s, ",seal");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400450 if (tcon->nocase)
Fabian Frederick571d5972014-05-13 18:04:17 +0200451 seq_puts(s, ",nocase");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400452 if (tcon->retry)
Fabian Frederick571d5972014-05-13 18:04:17 +0200453 seq_puts(s, ",hard");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000454 if (tcon->unix_ext)
Fabian Frederick571d5972014-05-13 18:04:17 +0200455 seq_puts(s, ",unix");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000456 else
Fabian Frederick571d5972014-05-13 18:04:17 +0200457 seq_puts(s, ",nounix");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400458 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
Fabian Frederick571d5972014-05-13 18:04:17 +0200459 seq_puts(s, ",posixpaths");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400460 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
Fabian Frederick571d5972014-05-13 18:04:17 +0200461 seq_puts(s, ",setuids");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400462 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
Fabian Frederick571d5972014-05-13 18:04:17 +0200463 seq_puts(s, ",serverino");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000464 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
Fabian Frederick571d5972014-05-13 18:04:17 +0200465 seq_puts(s, ",rwpidforward");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000466 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200467 seq_puts(s, ",forcemand");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400468 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
Fabian Frederick571d5972014-05-13 18:04:17 +0200469 seq_puts(s, ",nouser_xattr");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400470 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
Fabian Frederick571d5972014-05-13 18:04:17 +0200471 seq_puts(s, ",mapchars");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400472 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200473 seq_puts(s, ",sfu");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400474 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200475 seq_puts(s, ",nobrl");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400476 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200477 seq_puts(s, ",cifsacl");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400478 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
Fabian Frederick571d5972014-05-13 18:04:17 +0200479 seq_puts(s, ",dynperm");
Al Viro34c80b12011-12-08 21:32:45 -0500480 if (root->d_sb->s_flags & MS_POSIXACL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200481 seq_puts(s, ",acl");
Stefan Metzmacher736a3322010-07-30 14:56:00 +0200482 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
Fabian Frederick571d5972014-05-13 18:04:17 +0200483 seq_puts(s, ",mfsymlinks");
Suresh Jayaraman476428f2010-11-24 17:49:07 +0530484 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
Fabian Frederick571d5972014-05-13 18:04:17 +0200485 seq_puts(s, ",fsc");
Steve French71c424b2011-10-19 20:44:48 -0500486 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
Fabian Frederick571d5972014-05-13 18:04:17 +0200487 seq_puts(s, ",nostrictsync");
Steve French71c424b2011-10-19 20:44:48 -0500488 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
Fabian Frederick571d5972014-05-13 18:04:17 +0200489 seq_puts(s, ",noperm");
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +0100490 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
Eric W. Biederman1f682332013-02-06 01:20:20 -0800491 seq_printf(s, ",backupuid=%u",
492 from_kuid_munged(&init_user_ns,
493 cifs_sb->mnt_backupuid));
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +0100494 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
Eric W. Biederman1f682332013-02-06 01:20:20 -0800495 seq_printf(s, ",backupgid=%u",
496 from_kgid_munged(&init_user_ns,
497 cifs_sb->mnt_backupgid));
Steve French2b280fa2008-05-17 03:12:45 +0000498
Sachin Prabhu28f88812012-04-24 15:28:30 +0100499 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
500 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
Suresh Jayaraman6d20e842010-12-01 14:42:28 +0530501 /* convert actimeo and display it in seconds */
Sachin Prabhu156d1792012-04-25 12:10:14 +0100502 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400503
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 return 0;
505}
506
Al Viro42faad92008-04-24 07:21:56 -0400507static void cifs_umount_begin(struct super_block *sb)
Steve French68058e72005-10-10 10:34:22 -0700508{
Al Viro42faad92008-04-24 07:21:56 -0400509 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French96daf2b2011-05-27 04:34:02 +0000510 struct cifs_tcon *tcon;
Steve French68058e72005-10-10 10:34:22 -0700511
Steve French4523cc32007-04-30 20:13:06 +0000512 if (cifs_sb == NULL)
Steve French9e2e85f2005-10-10 14:28:38 -0700513 return;
514
Jeff Layton0d424ad2010-09-20 16:01:35 -0700515 tcon = cifs_sb_master_tcon(cifs_sb);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500516
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530517 spin_lock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000518 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
519 /* we have other mounts to same share or we have
520 already tried to force umount this and woken up
521 all waiting network requests, nothing to do */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530522 spin_unlock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000523 return;
524 } else if (tcon->tc_count == 1)
Steve French5e1253b2005-10-10 14:06:37 -0700525 tcon->tidStatus = CifsExiting;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530526 spin_unlock(&cifs_tcp_ses_lock);
Steve French5e1253b2005-10-10 14:06:37 -0700527
Steve French3a5ff612006-07-14 22:37:11 +0000528 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
Steve French7b7abfe2005-11-09 15:21:09 -0800529 /* cancel_notify_requests(tcon); */
Steve French50c2f752007-07-13 00:33:32 +0000530 if (tcon->ses && tcon->ses->server) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500531 cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
Steve French9e2e85f2005-10-10 14:28:38 -0700532 wake_up_all(&tcon->ses->server->request_q);
Steve French6ab16d22005-11-29 20:55:11 -0800533 wake_up_all(&tcon->ses->server->response_q);
534 msleep(1); /* yield */
535 /* we have to kick the requests once more */
536 wake_up_all(&tcon->ses->server->response_q);
537 msleep(1);
Steve French5e1253b2005-10-10 14:06:37 -0700538 }
Steve French68058e72005-10-10 10:34:22 -0700539
540 return;
541}
Steve French68058e72005-10-10 10:34:22 -0700542
Steve Frenchbf97d282006-09-28 21:34:06 +0000543#ifdef CONFIG_CIFS_STATS2
Al Viro64132372011-12-08 20:51:13 -0500544static int cifs_show_stats(struct seq_file *s, struct dentry *root)
Steve Frenchbf97d282006-09-28 21:34:06 +0000545{
546 /* BB FIXME */
547 return 0;
548}
549#endif
550
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551static int cifs_remount(struct super_block *sb, int *flags, char *data)
552{
Theodore Ts'o02b99842014-03-13 10:14:33 -0400553 sync_filesystem(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 *flags |= MS_NODIRATIME;
555 return 0;
556}
557
Al Viro45321ac2010-06-07 13:43:19 -0400558static int cifs_drop_inode(struct inode *inode)
Jeff Layton12420ac2010-06-01 14:47:40 -0400559{
560 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
561
Al Viro45321ac2010-06-07 13:43:19 -0400562 /* no serverino => unconditional eviction */
563 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
564 generic_drop_inode(inode);
Jeff Layton12420ac2010-06-01 14:47:40 -0400565}
566
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800567static const struct super_operations cifs_super_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 .statfs = cifs_statfs,
569 .alloc_inode = cifs_alloc_inode,
570 .destroy_inode = cifs_destroy_inode,
Jeff Layton12420ac2010-06-01 14:47:40 -0400571 .drop_inode = cifs_drop_inode,
Al Virob57922d2010-06-07 14:34:48 -0400572 .evict_inode = cifs_evict_inode,
Jeff Layton12420ac2010-06-01 14:47:40 -0400573/* .delete_inode = cifs_delete_inode, */ /* Do not need above
574 function unless later we add lazy close of inodes or unless the
Steve French50c2f752007-07-13 00:33:32 +0000575 kernel forgets to call us with the same number of releases (closes)
576 as opens */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 .show_options = cifs_show_options,
Steve French7b7abfe2005-11-09 15:21:09 -0800578 .umount_begin = cifs_umount_begin,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 .remount_fs = cifs_remount,
Steve Frenchbf97d282006-09-28 21:34:06 +0000580#ifdef CONFIG_CIFS_STATS2
Steve Frenchf46d3e12006-09-30 01:08:55 +0000581 .show_stats = cifs_show_stats,
Steve Frenchbf97d282006-09-28 21:34:06 +0000582#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583};
584
Steve Frenchf87d39d2011-05-27 03:50:55 +0000585/*
586 * Get root dentry from superblock according to prefix path mount option.
587 * Return dentry with refcount + 1 on success and NULL otherwise.
588 */
589static struct dentry *
590cifs_get_root(struct smb_vol *vol, struct super_block *sb)
591{
Al Virofec11dd2011-07-18 13:50:40 -0400592 struct dentry *dentry;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000593 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Al Virofec11dd2011-07-18 13:50:40 -0400594 char *full_path = NULL;
595 char *s, *p;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000596 char sep;
597
Steve French6d3ea7e2012-11-28 22:34:41 -0600598 full_path = cifs_build_path_to_root(vol, cifs_sb,
599 cifs_sb_master_tcon(cifs_sb));
Steve Frenchf87d39d2011-05-27 03:50:55 +0000600 if (full_path == NULL)
Al Viro9403c9c2011-06-17 10:02:59 -0400601 return ERR_PTR(-ENOMEM);
Steve Frenchf87d39d2011-05-27 03:50:55 +0000602
Joe Perchesf96637b2013-05-04 22:12:25 -0500603 cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
Steve Frenchf87d39d2011-05-27 03:50:55 +0000604
Steve Frenchf87d39d2011-05-27 03:50:55 +0000605 sep = CIFS_DIR_SEP(cifs_sb);
Al Virofec11dd2011-07-18 13:50:40 -0400606 dentry = dget(sb->s_root);
607 p = s = full_path;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000608
Al Virofec11dd2011-07-18 13:50:40 -0400609 do {
610 struct inode *dir = dentry->d_inode;
611 struct dentry *child;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000612
Pavel Shilovsky5b980b02011-08-21 19:30:15 +0400613 if (!dir) {
614 dput(dentry);
615 dentry = ERR_PTR(-ENOENT);
616 break;
617 }
Jeff Laytonce2ac522013-02-01 15:11:01 -0500618 if (!S_ISDIR(dir->i_mode)) {
619 dput(dentry);
620 dentry = ERR_PTR(-ENOTDIR);
621 break;
622 }
Pavel Shilovsky5b980b02011-08-21 19:30:15 +0400623
Al Virofec11dd2011-07-18 13:50:40 -0400624 /* skip separators */
625 while (*s == sep)
626 s++;
627 if (!*s)
628 break;
629 p = s++;
630 /* next separator */
631 while (*s && *s != sep)
632 s++;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000633
Al Virofec11dd2011-07-18 13:50:40 -0400634 mutex_lock(&dir->i_mutex);
635 child = lookup_one_len(p, dentry, s - p);
636 mutex_unlock(&dir->i_mutex);
637 dput(dentry);
638 dentry = child;
639 } while (!IS_ERR(dentry));
Steve Frenchf87d39d2011-05-27 03:50:55 +0000640 kfree(full_path);
Al Virofec11dd2011-07-18 13:50:40 -0400641 return dentry;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000642}
643
Al Viroee01a142011-06-17 09:47:23 -0400644static int cifs_set_super(struct super_block *sb, void *data)
645{
646 struct cifs_mnt_data *mnt_data = data;
647 sb->s_fs_info = mnt_data->cifs_sb;
648 return set_anon_super(sb, NULL);
649}
650
Al Virod753ed92010-07-26 12:52:33 +0400651static struct dentry *
652cifs_do_mount(struct file_system_type *fs_type,
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000653 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654{
655 int rc;
Jan Blunckdb719222010-08-15 22:51:10 +0200656 struct super_block *sb;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000657 struct cifs_sb_info *cifs_sb;
658 struct smb_vol *volume_info;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400659 struct cifs_mnt_data mnt_data;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000660 struct dentry *root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661
Joe Perchesf96637b2013-05-04 22:12:25 -0500662 cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663
Jeff Layton04db79b2011-07-06 08:10:38 -0400664 volume_info = cifs_get_volume_info((char *)data, dev_name);
665 if (IS_ERR(volume_info))
666 return ERR_CAST(volume_info);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000667
668 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
669 if (cifs_sb == NULL) {
670 root = ERR_PTR(-ENOMEM);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400671 goto out_nls;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000672 }
673
Al Viro5d3bc602011-06-17 09:17:28 -0400674 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
675 if (cifs_sb->mountdata == NULL) {
676 root = ERR_PTR(-ENOMEM);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400677 goto out_cifs_sb;
Al Viro5d3bc602011-06-17 09:17:28 -0400678 }
679
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000680 cifs_setup_cifs_sb(volume_info, cifs_sb);
681
Al Viro97d11522011-06-17 09:29:57 -0400682 rc = cifs_mount(cifs_sb, volume_info);
683 if (rc) {
684 if (!(flags & MS_SILENT))
Joe Perchesf96637b2013-05-04 22:12:25 -0500685 cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
686 rc);
Al Viro97d11522011-06-17 09:29:57 -0400687 root = ERR_PTR(rc);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400688 goto out_mountdata;
Al Viro97d11522011-06-17 09:29:57 -0400689 }
690
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400691 mnt_data.vol = volume_info;
692 mnt_data.cifs_sb = cifs_sb;
693 mnt_data.flags = flags;
694
David Howells9249e172012-06-25 12:55:37 +0100695 /* BB should we make this contingent on mount parm? */
696 flags |= MS_NODIRATIME | MS_NOATIME;
697
698 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000699 if (IS_ERR(sb)) {
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000700 root = ERR_CAST(sb);
Al Viro97d11522011-06-17 09:29:57 -0400701 cifs_umount(cifs_sb);
Al Virod757d712011-06-17 09:42:43 -0400702 goto out;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000703 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
Al Viroee01a142011-06-17 09:47:23 -0400705 if (sb->s_root) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500706 cifs_dbg(FYI, "Use existing superblock\n");
Al Viro97d11522011-06-17 09:29:57 -0400707 cifs_umount(cifs_sb);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400708 } else {
Al Viro5c4f1ad2011-06-17 09:56:55 -0400709 rc = cifs_read_super(sb);
710 if (rc) {
711 root = ERR_PTR(rc);
712 goto out_super;
713 }
714
715 sb->s_flags |= MS_ACTIVE;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400716 }
717
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400718 root = cifs_get_root(volume_info, sb);
Al Viro9403c9c2011-06-17 10:02:59 -0400719 if (IS_ERR(root))
Al Virofa18f1b2011-06-17 09:50:44 -0400720 goto out_super;
Al Virofa18f1b2011-06-17 09:50:44 -0400721
Joe Perchesf96637b2013-05-04 22:12:25 -0500722 cifs_dbg(FYI, "dentry root is: %p\n", root);
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400723 goto out;
724
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400725out_super:
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400726 deactivate_locked_super(sb);
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400727out:
Jeff Laytonf9e59bc2011-07-06 08:10:37 -0400728 cifs_cleanup_volume_info(volume_info);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000729 return root;
Al Viro5c4f1ad2011-06-17 09:56:55 -0400730
731out_mountdata:
732 kfree(cifs_sb->mountdata);
733out_cifs_sb:
734 kfree(cifs_sb);
735out_nls:
736 unload_nls(volume_info->local_nls);
737 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738}
739
Jeff Layton08bc0352014-05-23 06:50:21 -0400740static ssize_t
741cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
742{
743 ssize_t rc;
744 struct inode *inode = file_inode(iocb->ki_filp);
745
746 rc = cifs_revalidate_mapping(inode);
747 if (rc)
748 return rc;
749
750 return generic_file_read_iter(iocb, iter);
751}
752
Al Viro3dae8752014-04-03 12:05:17 -0400753static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
Steve French87c89dd2005-11-17 17:03:00 -0800754{
Al Viro496ad9a2013-01-23 17:07:38 -0500755 struct inode *inode = file_inode(iocb->ki_filp);
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000756 struct cifsInodeInfo *cinode = CIFS_I(inode);
Steve French87c89dd2005-11-17 17:03:00 -0800757 ssize_t written;
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500758 int rc;
Steve French87c89dd2005-11-17 17:03:00 -0800759
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000760 written = cifs_get_writer(cinode);
761 if (written)
762 return written;
763
Al Viro3dae8752014-04-03 12:05:17 -0400764 written = generic_file_write_iter(iocb, from);
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500765
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400766 if (CIFS_CACHE_WRITE(CIFS_I(inode)))
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000767 goto out;
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500768
769 rc = filemap_fdatawrite(inode->i_mapping);
770 if (rc)
Al Viro3dae8752014-04-03 12:05:17 -0400771 cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n",
Joe Perchesf96637b2013-05-04 22:12:25 -0500772 rc, inode);
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500773
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000774out:
775 cifs_put_writer(cinode);
Steve French87c89dd2005-11-17 17:03:00 -0800776 return written;
777}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778
Andrew Morton965c8e52012-12-17 15:59:39 -0800779static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
Steve Frenchc32a0b62006-01-12 14:41:28 -0800780{
Josef Bacik06222e42011-07-18 13:21:38 -0400781 /*
Andrew Morton965c8e52012-12-17 15:59:39 -0800782 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
Josef Bacik06222e42011-07-18 13:21:38 -0400783 * the cached file length
784 */
Andrew Morton965c8e52012-12-17 15:59:39 -0800785 if (whence != SEEK_SET && whence != SEEK_CUR) {
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400786 int rc;
Al Viro496ad9a2013-01-23 17:07:38 -0500787 struct inode *inode = file_inode(file);
Steve French030e9d82007-02-01 04:27:59 +0000788
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400789 /*
790 * We need to be sure that all dirty pages are written and the
791 * server has the newest file length.
792 */
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400793 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400794 inode->i_mapping->nrpages != 0) {
795 rc = filemap_fdatawait(inode->i_mapping);
Steve French156ecb22011-05-20 17:00:01 +0000796 if (rc) {
797 mapping_set_error(inode->i_mapping, rc);
798 return rc;
799 }
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400800 }
801 /*
802 * Some applications poll for the file length in this strange
803 * way so we must seek to end on non-oplocked files by
804 * setting the revalidate time to zero.
805 */
806 CIFS_I(inode)->time = 0;
Steve French030e9d82007-02-01 04:27:59 +0000807
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400808 rc = cifs_revalidate_file_attr(file);
809 if (rc < 0)
810 return (loff_t)rc;
Steve Frenchc32a0b62006-01-12 14:41:28 -0800811 }
Andrew Morton965c8e52012-12-17 15:59:39 -0800812 return generic_file_llseek(file, offset, whence);
Steve Frenchc32a0b62006-01-12 14:41:28 -0800813}
814
Jeff Laytone6f5c782014-08-22 10:40:25 -0400815static int
816cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv)
Steve French84210e92008-10-23 04:42:37 +0000817{
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400818 /*
819 * Note that this is called by vfs setlease with i_lock held to
820 * protect *lease from going away.
821 */
Al Viro496ad9a2013-01-23 17:07:38 -0500822 struct inode *inode = file_inode(file);
Jeff Laytonba00ba62010-09-20 16:01:31 -0700823 struct cifsFileInfo *cfile = file->private_data;
Steve French84210e92008-10-23 04:42:37 +0000824
825 if (!(S_ISREG(inode->i_mode)))
826 return -EINVAL;
827
Jeff Layton02440802014-08-09 10:16:44 -0400828 /* Check if file is oplocked if this is request for new lease */
829 if (arg == F_UNLCK ||
830 ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400831 ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
Jeff Laytone6f5c782014-08-22 10:40:25 -0400832 return generic_setlease(file, arg, lease, priv);
Jeff Layton13cfb732010-09-29 19:51:11 -0400833 else if (tlink_tcon(cfile->tlink)->local_lease &&
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400834 !CIFS_CACHE_READ(CIFS_I(inode)))
835 /*
836 * If the server claims to support oplock on this file, then we
837 * still need to check oplock even if the local_lease mount
838 * option is set, but there are servers which do not support
839 * oplock for which this mount option may be useful if the user
840 * knows that the file won't be changed on the server by anyone
841 * else.
842 */
Jeff Laytone6f5c782014-08-22 10:40:25 -0400843 return generic_setlease(file, arg, lease, priv);
Christoph Hellwig51ee4b82010-10-31 08:35:10 -0400844 else
Steve French84210e92008-10-23 04:42:37 +0000845 return -EAGAIN;
846}
Steve French84210e92008-10-23 04:42:37 +0000847
Igor Mammedove6ab1582008-01-11 01:49:48 +0000848struct file_system_type cifs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 .owner = THIS_MODULE,
850 .name = "cifs",
Al Virod753ed92010-07-26 12:52:33 +0400851 .mount = cifs_do_mount,
Al Viro6d686172011-06-17 08:34:57 -0400852 .kill_sb = cifs_kill_sb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 /* .fs_flags */
854};
Eric W. Biederman3e64fe52013-03-11 07:05:42 -0700855MODULE_ALIAS_FS("cifs");
Arjan van de Ven754661f2007-02-12 00:55:38 -0800856const struct inode_operations cifs_dir_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 .create = cifs_create,
Miklos Szeredid2c12712012-06-05 15:10:23 +0200858 .atomic_open = cifs_atomic_open,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 .lookup = cifs_lookup,
860 .getattr = cifs_getattr,
861 .unlink = cifs_unlink,
862 .link = cifs_hardlink,
863 .mkdir = cifs_mkdir,
864 .rmdir = cifs_rmdir,
Miklos Szeredi7c33d592014-07-23 15:15:36 +0200865 .rename2 = cifs_rename2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 .permission = cifs_permission,
867/* revalidate:cifs_revalidate, */
868 .setattr = cifs_setattr,
869 .symlink = cifs_symlink,
870 .mknod = cifs_mknod,
871#ifdef CONFIG_CIFS_XATTR
872 .setxattr = cifs_setxattr,
873 .getxattr = cifs_getxattr,
874 .listxattr = cifs_listxattr,
875 .removexattr = cifs_removexattr,
876#endif
877};
878
Arjan van de Ven754661f2007-02-12 00:55:38 -0800879const struct inode_operations cifs_file_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880/* revalidate:cifs_revalidate, */
881 .setattr = cifs_setattr,
882 .getattr = cifs_getattr, /* do we need this anymore? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 .permission = cifs_permission,
884#ifdef CONFIG_CIFS_XATTR
885 .setxattr = cifs_setxattr,
886 .getxattr = cifs_getxattr,
887 .listxattr = cifs_listxattr,
888 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000889#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890};
891
Arjan van de Ven754661f2007-02-12 00:55:38 -0800892const struct inode_operations cifs_symlink_inode_ops = {
Steve French50c2f752007-07-13 00:33:32 +0000893 .readlink = generic_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 .follow_link = cifs_follow_link,
Al Viro87dc8002013-09-16 10:30:04 -0400895 .put_link = kfree_put_link,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 .permission = cifs_permission,
897 /* BB add the following two eventually */
898 /* revalidate: cifs_revalidate,
899 setattr: cifs_notify_change, *//* BB do we need notify change */
900#ifdef CONFIG_CIFS_XATTR
901 .setxattr = cifs_setxattr,
902 .getxattr = cifs_getxattr,
903 .listxattr = cifs_listxattr,
904 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000905#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906};
907
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800908const struct file_operations cifs_file_ops = {
Jeff Layton08bc0352014-05-23 06:50:21 -0400909 .read_iter = cifs_loose_read_iter,
Al Viro3dae8752014-04-03 12:05:17 -0400910 .write_iter = cifs_file_write_iter,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 .open = cifs_open,
912 .release = cifs_close,
913 .lock = cifs_lock,
914 .fsync = cifs_fsync,
915 .flush = cifs_flush,
916 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200917 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800918 .llseek = cifs_llseek,
Steve Frenchc67593a2005-04-28 22:41:04 -0700919#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000920 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700921#endif /* CONFIG_CIFS_POSIX */
Steve French84210e92008-10-23 04:42:37 +0000922 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -0500923 .fallocate = cifs_fallocate,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924};
925
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300926const struct file_operations cifs_file_strict_ops = {
Al Viroe6a7bcb2014-04-02 19:53:36 -0400927 .read_iter = cifs_strict_readv,
Al Viro3dae8752014-04-03 12:05:17 -0400928 .write_iter = cifs_strict_writev,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300929 .open = cifs_open,
930 .release = cifs_close,
931 .lock = cifs_lock,
932 .fsync = cifs_strict_fsync,
933 .flush = cifs_flush,
Pavel Shilovsky7a6a19b2010-12-14 11:29:51 +0300934 .mmap = cifs_file_strict_mmap,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300935 .splice_read = generic_file_splice_read,
936 .llseek = cifs_llseek,
937#ifdef CONFIG_CIFS_POSIX
938 .unlocked_ioctl = cifs_ioctl,
939#endif /* CONFIG_CIFS_POSIX */
940 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -0500941 .fallocate = cifs_fallocate,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300942};
943
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800944const struct file_operations cifs_file_direct_ops = {
Pavel Shilovsky0b81c1c2011-03-10 10:11:05 +0300945 /* BB reevaluate whether they can be done with directio, no cache */
Al Viroe6a7bcb2014-04-02 19:53:36 -0400946 .read_iter = cifs_user_readv,
Al Viro3dae8752014-04-03 12:05:17 -0400947 .write_iter = cifs_user_writev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 .open = cifs_open,
949 .release = cifs_close,
950 .lock = cifs_lock,
951 .fsync = cifs_fsync,
952 .flush = cifs_flush,
Steve Frencha994b8f2009-12-07 05:44:46 +0000953 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200954 .splice_read = generic_file_splice_read,
Steve Frenchc67593a2005-04-28 22:41:04 -0700955#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000956 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700957#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -0800958 .llseek = cifs_llseek,
Steve French84210e92008-10-23 04:42:37 +0000959 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -0500960 .fallocate = cifs_fallocate,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961};
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300962
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800963const struct file_operations cifs_file_nobrl_ops = {
Jeff Layton08bc0352014-05-23 06:50:21 -0400964 .read_iter = cifs_loose_read_iter,
Al Viro3dae8752014-04-03 12:05:17 -0400965 .write_iter = cifs_file_write_iter,
Steve French87c89dd2005-11-17 17:03:00 -0800966 .open = cifs_open,
967 .release = cifs_close,
968 .fsync = cifs_fsync,
969 .flush = cifs_flush,
970 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200971 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800972 .llseek = cifs_llseek,
Steve French8b94bcb2005-11-11 11:41:00 -0800973#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000974 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -0800975#endif /* CONFIG_CIFS_POSIX */
Steve French84210e92008-10-23 04:42:37 +0000976 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -0500977 .fallocate = cifs_fallocate,
Steve French8b94bcb2005-11-11 11:41:00 -0800978};
979
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300980const struct file_operations cifs_file_strict_nobrl_ops = {
Al Viroe6a7bcb2014-04-02 19:53:36 -0400981 .read_iter = cifs_strict_readv,
Al Viro3dae8752014-04-03 12:05:17 -0400982 .write_iter = cifs_strict_writev,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300983 .open = cifs_open,
984 .release = cifs_close,
985 .fsync = cifs_strict_fsync,
986 .flush = cifs_flush,
Pavel Shilovsky7a6a19b2010-12-14 11:29:51 +0300987 .mmap = cifs_file_strict_mmap,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300988 .splice_read = generic_file_splice_read,
989 .llseek = cifs_llseek,
990#ifdef CONFIG_CIFS_POSIX
991 .unlocked_ioctl = cifs_ioctl,
992#endif /* CONFIG_CIFS_POSIX */
993 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -0500994 .fallocate = cifs_fallocate,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300995};
996
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800997const struct file_operations cifs_file_direct_nobrl_ops = {
Pavel Shilovsky0b81c1c2011-03-10 10:11:05 +0300998 /* BB reevaluate whether they can be done with directio, no cache */
Al Viroe6a7bcb2014-04-02 19:53:36 -0400999 .read_iter = cifs_user_readv,
Al Viro3dae8752014-04-03 12:05:17 -04001000 .write_iter = cifs_user_writev,
Steve French87c89dd2005-11-17 17:03:00 -08001001 .open = cifs_open,
1002 .release = cifs_close,
1003 .fsync = cifs_fsync,
1004 .flush = cifs_flush,
Pavel Shilovsky810627a02010-03-27 02:00:49 +00001005 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +02001006 .splice_read = generic_file_splice_read,
Steve French8b94bcb2005-11-11 11:41:00 -08001007#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +00001008 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -08001009#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -08001010 .llseek = cifs_llseek,
Steve French84210e92008-10-23 04:42:37 +00001011 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -05001012 .fallocate = cifs_fallocate,
Steve French8b94bcb2005-11-11 11:41:00 -08001013};
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -08001015const struct file_operations cifs_dir_ops = {
Al Virobe4ccdc2013-05-22 16:17:25 -04001016 .iterate = cifs_readdir,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 .release = cifs_closedir,
1018 .read = generic_read_dir,
Steve Frenchf9ddcca2008-05-15 05:51:55 +00001019 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig3222a3e2008-09-03 21:53:01 +02001020 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021};
1022
1023static void
Alexey Dobriyan51cc5062008-07-25 19:45:34 -07001024cifs_init_once(void *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025{
1026 struct cifsInodeInfo *cifsi = inode;
1027
Christoph Lametera35afb82007-05-16 22:10:57 -07001028 inode_init_once(&cifsi->vfs_inode);
Pavel Shilovsky1b4b55a2012-09-19 06:22:44 -07001029 init_rwsem(&cifsi->lock_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030}
1031
Fabian Frederick9ee108b2014-04-03 14:46:30 -07001032static int __init
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033cifs_init_inodecache(void)
1034{
1035 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
Steve French26f57362007-08-30 22:09:15 +00001036 sizeof(struct cifsInodeInfo),
Paul Jacksonfffb60f2006-03-24 03:16:06 -08001037 0, (SLAB_RECLAIM_ACCOUNT|
1038 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +09001039 cifs_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 if (cifs_inode_cachep == NULL)
1041 return -ENOMEM;
1042
1043 return 0;
1044}
1045
1046static void
1047cifs_destroy_inodecache(void)
1048{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +10001049 /*
1050 * Make sure all delayed rcu free inodes are flushed before we
1051 * destroy cache.
1052 */
1053 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001054 kmem_cache_destroy(cifs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055}
1056
1057static int
1058cifs_init_request_bufs(void)
1059{
Pavel Shilovsky3792c172012-01-12 22:40:50 +04001060 size_t max_hdr_size = MAX_CIFS_HDR_SIZE;
1061#ifdef CONFIG_CIFS_SMB2
1062 /*
1063 * SMB2 maximum header size is bigger than CIFS one - no problems to
1064 * allocate some more bytes for CIFS.
1065 */
1066 max_hdr_size = MAX_SMB2_HDR_SIZE;
1067#endif
Steve French4523cc32007-04-30 20:13:06 +00001068 if (CIFSMaxBufSize < 8192) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1070 Unicode path name has to fit in any SMB/CIFS path based frames */
1071 CIFSMaxBufSize = 8192;
1072 } else if (CIFSMaxBufSize > 1024*127) {
1073 CIFSMaxBufSize = 1024 * 127;
1074 } else {
1075 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1076 }
Joe Perchesf96637b2013-05-04 22:12:25 -05001077/*
1078 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
1079 CIFSMaxBufSize, CIFSMaxBufSize);
1080*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 cifs_req_cachep = kmem_cache_create("cifs_request",
Pavel Shilovsky3792c172012-01-12 22:40:50 +04001082 CIFSMaxBufSize + max_hdr_size, 0,
Paul Mundt20c2df82007-07-20 10:11:58 +09001083 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 if (cifs_req_cachep == NULL)
1085 return -ENOMEM;
1086
Steve French4523cc32007-04-30 20:13:06 +00001087 if (cifs_min_rcv < 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 cifs_min_rcv = 1;
1089 else if (cifs_min_rcv > 64) {
1090 cifs_min_rcv = 64;
Joe Perchesf96637b2013-05-04 22:12:25 -05001091 cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 }
1093
Matthew Dobson93d23412006-03-26 01:37:50 -08001094 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1095 cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096
Steve French4523cc32007-04-30 20:13:06 +00001097 if (cifs_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 kmem_cache_destroy(cifs_req_cachep);
1099 return -ENOMEM;
1100 }
Steve Frenchec637e32005-12-12 20:53:18 -08001101 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 almost all handle based requests (but not write response, nor is it
1103 sufficient for path based requests). A smaller size would have
Steve French50c2f752007-07-13 00:33:32 +00001104 been more efficient (compacting multiple slab items on one 4k page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 for the case in which debug was on, but this larger size allows
1106 more SMBs to use small buffer alloc and is still much more
Steve French6dc0f872007-07-06 23:13:06 +00001107 efficient to alloc 1 per page off the slab compared to 17K (5page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 alloc of large cifs buffers even when page debugging is on */
1109 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
Steve French6dc0f872007-07-06 23:13:06 +00001110 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +09001111 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 if (cifs_sm_req_cachep == NULL) {
1113 mempool_destroy(cifs_req_poolp);
1114 kmem_cache_destroy(cifs_req_cachep);
Steve French6dc0f872007-07-06 23:13:06 +00001115 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 }
1117
Steve French4523cc32007-04-30 20:13:06 +00001118 if (cifs_min_small < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 cifs_min_small = 2;
1120 else if (cifs_min_small > 256) {
1121 cifs_min_small = 256;
Joe Perchesf96637b2013-05-04 22:12:25 -05001122 cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123 }
1124
Matthew Dobson93d23412006-03-26 01:37:50 -08001125 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1126 cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127
Steve French4523cc32007-04-30 20:13:06 +00001128 if (cifs_sm_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 mempool_destroy(cifs_req_poolp);
1130 kmem_cache_destroy(cifs_req_cachep);
1131 kmem_cache_destroy(cifs_sm_req_cachep);
1132 return -ENOMEM;
1133 }
1134
1135 return 0;
1136}
1137
1138static void
1139cifs_destroy_request_bufs(void)
1140{
1141 mempool_destroy(cifs_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001142 kmem_cache_destroy(cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 mempool_destroy(cifs_sm_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001144 kmem_cache_destroy(cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145}
1146
1147static int
1148cifs_init_mids(void)
1149{
1150 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
Steve French26f57362007-08-30 22:09:15 +00001151 sizeof(struct mid_q_entry), 0,
1152 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 if (cifs_mid_cachep == NULL)
1154 return -ENOMEM;
1155
Matthew Dobson93d23412006-03-26 01:37:50 -08001156 /* 3 is a reasonable minimum number of simultaneous operations */
1157 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
Steve French4523cc32007-04-30 20:13:06 +00001158 if (cifs_mid_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 kmem_cache_destroy(cifs_mid_cachep);
1160 return -ENOMEM;
1161 }
1162
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 return 0;
1164}
1165
1166static void
1167cifs_destroy_mids(void)
1168{
1169 mempool_destroy(cifs_mid_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001170 kmem_cache_destroy(cifs_mid_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171}
1172
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173static int __init
1174init_cifs(void)
1175{
1176 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 cifs_proc_init();
Jeff Laytone7ddee92008-11-14 13:44:38 -05001178 INIT_LIST_HEAD(&cifs_tcp_ses_list);
Steve French0eff0e22011-02-24 05:39:23 +00001179#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
Steve French4ca9c192005-10-10 19:52:13 -07001180 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1181 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
Steve French0eff0e22011-02-24 05:39:23 +00001182#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183/*
1184 * Initialize Global counters
1185 */
1186 atomic_set(&sesInfoAllocCount, 0);
1187 atomic_set(&tconInfoAllocCount, 0);
Steve French6dc0f872007-07-06 23:13:06 +00001188 atomic_set(&tcpSesAllocCount, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 atomic_set(&tcpSesReconnectCount, 0);
1190 atomic_set(&tconInfoReconnectCount, 0);
1191
1192 atomic_set(&bufAllocCount, 0);
Steve French4498eed52005-12-03 13:58:57 -08001193 atomic_set(&smBufAllocCount, 0);
1194#ifdef CONFIG_CIFS_STATS2
1195 atomic_set(&totBufAllocCount, 0);
1196 atomic_set(&totSmBufAllocCount, 0);
1197#endif /* CONFIG_CIFS_STATS2 */
1198
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 atomic_set(&midCount, 0);
1200 GlobalCurrentXid = 0;
1201 GlobalTotalActiveXid = 0;
1202 GlobalMaxActiveXid = 0;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301203 spin_lock_init(&cifs_tcp_ses_lock);
Jeff Layton44772882010-10-15 15:34:03 -04001204 spin_lock_init(&cifs_file_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 spin_lock_init(&GlobalMid_Lock);
1206
Steve French4523cc32007-04-30 20:13:06 +00001207 if (cifs_max_pending < 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 cifs_max_pending = 2;
Joe Perchesf96637b2013-05-04 22:12:25 -05001209 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
Pavel Shilovsky10b9b982012-03-20 12:55:09 +03001210 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1211 cifs_max_pending = CIFS_MAX_REQ;
Joe Perchesf96637b2013-05-04 22:12:25 -05001212 cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
1213 CIFS_MAX_REQ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 }
1215
Jeff Laytonda472fc2012-03-23 14:40:53 -04001216 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1217 if (!cifsiod_wq) {
1218 rc = -ENOMEM;
1219 goto out_clean_proc;
1220 }
1221
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301222 rc = cifs_fscache_register();
1223 if (rc)
Jeff Laytonda472fc2012-03-23 14:40:53 -04001224 goto out_destroy_wq;
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301225
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 rc = cifs_init_inodecache();
Steve French45af7a02006-04-21 22:52:25 +00001227 if (rc)
Steve Frenchd3bf5222010-09-22 19:15:36 +00001228 goto out_unreg_fscache;
Steve French45af7a02006-04-21 22:52:25 +00001229
1230 rc = cifs_init_mids();
1231 if (rc)
1232 goto out_destroy_inodecache;
1233
1234 rc = cifs_init_request_bufs();
1235 if (rc)
1236 goto out_destroy_mids;
1237
Jeff Layton84a15b92007-11-03 05:02:24 +00001238#ifdef CONFIG_CIFS_UPCALL
1239 rc = register_key_type(&cifs_spnego_key_type);
1240 if (rc)
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001241 goto out_destroy_request_bufs;
1242#endif /* CONFIG_CIFS_UPCALL */
1243
1244#ifdef CONFIG_CIFS_ACL
1245 rc = init_cifs_idmap();
1246 if (rc)
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001247 goto out_register_key_type;
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001248#endif /* CONFIG_CIFS_ACL */
1249
1250 rc = register_filesystem(&cifs_fs_type);
1251 if (rc)
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001252 goto out_init_cifs_idmap;
Steve French45af7a02006-04-21 22:52:25 +00001253
Steve French45af7a02006-04-21 22:52:25 +00001254 return 0;
1255
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001256out_init_cifs_idmap:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001257#ifdef CONFIG_CIFS_ACL
1258 exit_cifs_idmap();
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001259out_register_key_type:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001260#endif
1261#ifdef CONFIG_CIFS_UPCALL
1262 unregister_key_type(&cifs_spnego_key_type);
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001263out_destroy_request_bufs:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001264#endif
Steve French45af7a02006-04-21 22:52:25 +00001265 cifs_destroy_request_bufs();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001266out_destroy_mids:
Steve French45af7a02006-04-21 22:52:25 +00001267 cifs_destroy_mids();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001268out_destroy_inodecache:
Steve French45af7a02006-04-21 22:52:25 +00001269 cifs_destroy_inodecache();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001270out_unreg_fscache:
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301271 cifs_fscache_unregister();
Jeff Laytonda472fc2012-03-23 14:40:53 -04001272out_destroy_wq:
1273 destroy_workqueue(cifsiod_wq);
Steve Frenchd3bf5222010-09-22 19:15:36 +00001274out_clean_proc:
1275 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 return rc;
1277}
1278
1279static void __exit
1280exit_cifs(void)
1281{
Joe Perchesf96637b2013-05-04 22:12:25 -05001282 cifs_dbg(NOISY, "exit_cifs\n");
Jeff Layton3dd93302012-03-21 06:27:55 -04001283 unregister_filesystem(&cifs_fs_type);
Igor Mammedov78d31a32008-04-24 12:56:07 +04001284 cifs_dfs_release_automount_timer();
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001285#ifdef CONFIG_CIFS_ACL
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001286 exit_cifs_idmap();
1287#endif
Jeff Layton84a15b92007-11-03 05:02:24 +00001288#ifdef CONFIG_CIFS_UPCALL
1289 unregister_key_type(&cifs_spnego_key_type);
1290#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 cifs_destroy_request_bufs();
Jeff Layton3dd93302012-03-21 06:27:55 -04001292 cifs_destroy_mids();
1293 cifs_destroy_inodecache();
1294 cifs_fscache_unregister();
Jeff Laytonda472fc2012-03-23 14:40:53 -04001295 destroy_workqueue(cifsiod_wq);
Jeff Layton3dd93302012-03-21 06:27:55 -04001296 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297}
1298
1299MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
Steve French6dc0f872007-07-06 23:13:06 +00001300MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301MODULE_DESCRIPTION
Steve French63135e02007-07-17 17:34:02 +00001302 ("VFS to access servers complying with the SNIA CIFS Specification "
1303 "e.g. Samba and Windows");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304MODULE_VERSION(CIFS_VERSION);
1305module_init(init_cifs)
1306module_exit(exit_cifs)