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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");
Nakajima Akirabc8ebdc42015-02-13 15:35:58 +0900472 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
473 seq_puts(s, ",mapposix");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400474 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200475 seq_puts(s, ",sfu");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400476 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200477 seq_puts(s, ",nobrl");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400478 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200479 seq_puts(s, ",cifsacl");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400480 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
Fabian Frederick571d5972014-05-13 18:04:17 +0200481 seq_puts(s, ",dynperm");
Al Viro34c80b12011-12-08 21:32:45 -0500482 if (root->d_sb->s_flags & MS_POSIXACL)
Fabian Frederick571d5972014-05-13 18:04:17 +0200483 seq_puts(s, ",acl");
Stefan Metzmacher736a3322010-07-30 14:56:00 +0200484 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
Fabian Frederick571d5972014-05-13 18:04:17 +0200485 seq_puts(s, ",mfsymlinks");
Suresh Jayaraman476428f2010-11-24 17:49:07 +0530486 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
Fabian Frederick571d5972014-05-13 18:04:17 +0200487 seq_puts(s, ",fsc");
Steve French71c424b2011-10-19 20:44:48 -0500488 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
Fabian Frederick571d5972014-05-13 18:04:17 +0200489 seq_puts(s, ",nostrictsync");
Steve French71c424b2011-10-19 20:44:48 -0500490 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
Fabian Frederick571d5972014-05-13 18:04:17 +0200491 seq_puts(s, ",noperm");
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +0100492 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
Eric W. Biederman1f682332013-02-06 01:20:20 -0800493 seq_printf(s, ",backupuid=%u",
494 from_kuid_munged(&init_user_ns,
495 cifs_sb->mnt_backupuid));
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +0100496 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
Eric W. Biederman1f682332013-02-06 01:20:20 -0800497 seq_printf(s, ",backupgid=%u",
498 from_kgid_munged(&init_user_ns,
499 cifs_sb->mnt_backupgid));
Steve French2b280fa2008-05-17 03:12:45 +0000500
Sachin Prabhu28f88812012-04-24 15:28:30 +0100501 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
502 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
Suresh Jayaraman6d20e842010-12-01 14:42:28 +0530503 /* convert actimeo and display it in seconds */
Sachin Prabhu156d1792012-04-25 12:10:14 +0100504 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400505
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 return 0;
507}
508
Al Viro42faad92008-04-24 07:21:56 -0400509static void cifs_umount_begin(struct super_block *sb)
Steve French68058e72005-10-10 10:34:22 -0700510{
Al Viro42faad92008-04-24 07:21:56 -0400511 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French96daf2b2011-05-27 04:34:02 +0000512 struct cifs_tcon *tcon;
Steve French68058e72005-10-10 10:34:22 -0700513
Steve French4523cc32007-04-30 20:13:06 +0000514 if (cifs_sb == NULL)
Steve French9e2e85f2005-10-10 14:28:38 -0700515 return;
516
Jeff Layton0d424ad2010-09-20 16:01:35 -0700517 tcon = cifs_sb_master_tcon(cifs_sb);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500518
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530519 spin_lock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000520 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
521 /* we have other mounts to same share or we have
522 already tried to force umount this and woken up
523 all waiting network requests, nothing to do */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530524 spin_unlock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000525 return;
526 } else if (tcon->tc_count == 1)
Steve French5e1253b2005-10-10 14:06:37 -0700527 tcon->tidStatus = CifsExiting;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530528 spin_unlock(&cifs_tcp_ses_lock);
Steve French5e1253b2005-10-10 14:06:37 -0700529
Steve French3a5ff612006-07-14 22:37:11 +0000530 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
Steve French7b7abfe2005-11-09 15:21:09 -0800531 /* cancel_notify_requests(tcon); */
Steve French50c2f752007-07-13 00:33:32 +0000532 if (tcon->ses && tcon->ses->server) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500533 cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
Steve French9e2e85f2005-10-10 14:28:38 -0700534 wake_up_all(&tcon->ses->server->request_q);
Steve French6ab16d22005-11-29 20:55:11 -0800535 wake_up_all(&tcon->ses->server->response_q);
536 msleep(1); /* yield */
537 /* we have to kick the requests once more */
538 wake_up_all(&tcon->ses->server->response_q);
539 msleep(1);
Steve French5e1253b2005-10-10 14:06:37 -0700540 }
Steve French68058e72005-10-10 10:34:22 -0700541
542 return;
543}
Steve French68058e72005-10-10 10:34:22 -0700544
Steve Frenchbf97d282006-09-28 21:34:06 +0000545#ifdef CONFIG_CIFS_STATS2
Al Viro64132372011-12-08 20:51:13 -0500546static int cifs_show_stats(struct seq_file *s, struct dentry *root)
Steve Frenchbf97d282006-09-28 21:34:06 +0000547{
548 /* BB FIXME */
549 return 0;
550}
551#endif
552
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553static int cifs_remount(struct super_block *sb, int *flags, char *data)
554{
Theodore Ts'o02b99842014-03-13 10:14:33 -0400555 sync_filesystem(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 *flags |= MS_NODIRATIME;
557 return 0;
558}
559
Al Viro45321ac2010-06-07 13:43:19 -0400560static int cifs_drop_inode(struct inode *inode)
Jeff Layton12420ac2010-06-01 14:47:40 -0400561{
562 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
563
Al Viro45321ac2010-06-07 13:43:19 -0400564 /* no serverino => unconditional eviction */
565 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
566 generic_drop_inode(inode);
Jeff Layton12420ac2010-06-01 14:47:40 -0400567}
568
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800569static const struct super_operations cifs_super_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 .statfs = cifs_statfs,
571 .alloc_inode = cifs_alloc_inode,
572 .destroy_inode = cifs_destroy_inode,
Jeff Layton12420ac2010-06-01 14:47:40 -0400573 .drop_inode = cifs_drop_inode,
Al Virob57922d2010-06-07 14:34:48 -0400574 .evict_inode = cifs_evict_inode,
Jeff Layton12420ac2010-06-01 14:47:40 -0400575/* .delete_inode = cifs_delete_inode, */ /* Do not need above
576 function unless later we add lazy close of inodes or unless the
Steve French50c2f752007-07-13 00:33:32 +0000577 kernel forgets to call us with the same number of releases (closes)
578 as opens */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 .show_options = cifs_show_options,
Steve French7b7abfe2005-11-09 15:21:09 -0800580 .umount_begin = cifs_umount_begin,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 .remount_fs = cifs_remount,
Steve Frenchbf97d282006-09-28 21:34:06 +0000582#ifdef CONFIG_CIFS_STATS2
Steve Frenchf46d3e12006-09-30 01:08:55 +0000583 .show_stats = cifs_show_stats,
Steve Frenchbf97d282006-09-28 21:34:06 +0000584#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585};
586
Steve Frenchf87d39d2011-05-27 03:50:55 +0000587/*
588 * Get root dentry from superblock according to prefix path mount option.
589 * Return dentry with refcount + 1 on success and NULL otherwise.
590 */
591static struct dentry *
592cifs_get_root(struct smb_vol *vol, struct super_block *sb)
593{
Al Virofec11dd2011-07-18 13:50:40 -0400594 struct dentry *dentry;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000595 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Al Virofec11dd2011-07-18 13:50:40 -0400596 char *full_path = NULL;
597 char *s, *p;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000598 char sep;
599
Steve French6d3ea7e2012-11-28 22:34:41 -0600600 full_path = cifs_build_path_to_root(vol, cifs_sb,
601 cifs_sb_master_tcon(cifs_sb));
Steve Frenchf87d39d2011-05-27 03:50:55 +0000602 if (full_path == NULL)
Al Viro9403c9c2011-06-17 10:02:59 -0400603 return ERR_PTR(-ENOMEM);
Steve Frenchf87d39d2011-05-27 03:50:55 +0000604
Joe Perchesf96637b2013-05-04 22:12:25 -0500605 cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
Steve Frenchf87d39d2011-05-27 03:50:55 +0000606
Steve Frenchf87d39d2011-05-27 03:50:55 +0000607 sep = CIFS_DIR_SEP(cifs_sb);
Al Virofec11dd2011-07-18 13:50:40 -0400608 dentry = dget(sb->s_root);
609 p = s = full_path;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000610
Al Virofec11dd2011-07-18 13:50:40 -0400611 do {
David Howells2b0143b2015-03-17 22:25:59 +0000612 struct inode *dir = d_inode(dentry);
Al Virofec11dd2011-07-18 13:50:40 -0400613 struct dentry *child;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000614
Pavel Shilovsky5b980b02011-08-21 19:30:15 +0400615 if (!dir) {
616 dput(dentry);
617 dentry = ERR_PTR(-ENOENT);
618 break;
619 }
Jeff Laytonce2ac522013-02-01 15:11:01 -0500620 if (!S_ISDIR(dir->i_mode)) {
621 dput(dentry);
622 dentry = ERR_PTR(-ENOTDIR);
623 break;
624 }
Pavel Shilovsky5b980b02011-08-21 19:30:15 +0400625
Al Virofec11dd2011-07-18 13:50:40 -0400626 /* skip separators */
627 while (*s == sep)
628 s++;
629 if (!*s)
630 break;
631 p = s++;
632 /* next separator */
633 while (*s && *s != sep)
634 s++;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000635
Al Virofec11dd2011-07-18 13:50:40 -0400636 mutex_lock(&dir->i_mutex);
637 child = lookup_one_len(p, dentry, s - p);
638 mutex_unlock(&dir->i_mutex);
639 dput(dentry);
640 dentry = child;
641 } while (!IS_ERR(dentry));
Steve Frenchf87d39d2011-05-27 03:50:55 +0000642 kfree(full_path);
Al Virofec11dd2011-07-18 13:50:40 -0400643 return dentry;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000644}
645
Al Viroee01a142011-06-17 09:47:23 -0400646static int cifs_set_super(struct super_block *sb, void *data)
647{
648 struct cifs_mnt_data *mnt_data = data;
649 sb->s_fs_info = mnt_data->cifs_sb;
650 return set_anon_super(sb, NULL);
651}
652
Al Virod753ed92010-07-26 12:52:33 +0400653static struct dentry *
654cifs_do_mount(struct file_system_type *fs_type,
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000655 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656{
657 int rc;
Jan Blunckdb719222010-08-15 22:51:10 +0200658 struct super_block *sb;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000659 struct cifs_sb_info *cifs_sb;
660 struct smb_vol *volume_info;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400661 struct cifs_mnt_data mnt_data;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000662 struct dentry *root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663
Joe Perchesf96637b2013-05-04 22:12:25 -0500664 cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665
Jeff Layton04db79b2011-07-06 08:10:38 -0400666 volume_info = cifs_get_volume_info((char *)data, dev_name);
667 if (IS_ERR(volume_info))
668 return ERR_CAST(volume_info);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000669
670 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
671 if (cifs_sb == NULL) {
672 root = ERR_PTR(-ENOMEM);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400673 goto out_nls;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000674 }
675
Al Viro5d3bc602011-06-17 09:17:28 -0400676 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
677 if (cifs_sb->mountdata == NULL) {
678 root = ERR_PTR(-ENOMEM);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400679 goto out_cifs_sb;
Al Viro5d3bc602011-06-17 09:17:28 -0400680 }
681
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000682 cifs_setup_cifs_sb(volume_info, cifs_sb);
683
Al Viro97d11522011-06-17 09:29:57 -0400684 rc = cifs_mount(cifs_sb, volume_info);
685 if (rc) {
686 if (!(flags & MS_SILENT))
Joe Perchesf96637b2013-05-04 22:12:25 -0500687 cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
688 rc);
Al Viro97d11522011-06-17 09:29:57 -0400689 root = ERR_PTR(rc);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400690 goto out_mountdata;
Al Viro97d11522011-06-17 09:29:57 -0400691 }
692
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400693 mnt_data.vol = volume_info;
694 mnt_data.cifs_sb = cifs_sb;
695 mnt_data.flags = flags;
696
David Howells9249e172012-06-25 12:55:37 +0100697 /* BB should we make this contingent on mount parm? */
698 flags |= MS_NODIRATIME | MS_NOATIME;
699
700 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000701 if (IS_ERR(sb)) {
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000702 root = ERR_CAST(sb);
Al Viro97d11522011-06-17 09:29:57 -0400703 cifs_umount(cifs_sb);
Al Virod757d712011-06-17 09:42:43 -0400704 goto out;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000705 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
Al Viroee01a142011-06-17 09:47:23 -0400707 if (sb->s_root) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500708 cifs_dbg(FYI, "Use existing superblock\n");
Al Viro97d11522011-06-17 09:29:57 -0400709 cifs_umount(cifs_sb);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400710 } else {
Al Viro5c4f1ad2011-06-17 09:56:55 -0400711 rc = cifs_read_super(sb);
712 if (rc) {
713 root = ERR_PTR(rc);
714 goto out_super;
715 }
716
717 sb->s_flags |= MS_ACTIVE;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400718 }
719
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400720 root = cifs_get_root(volume_info, sb);
Al Viro9403c9c2011-06-17 10:02:59 -0400721 if (IS_ERR(root))
Al Virofa18f1b2011-06-17 09:50:44 -0400722 goto out_super;
Al Virofa18f1b2011-06-17 09:50:44 -0400723
Joe Perchesf96637b2013-05-04 22:12:25 -0500724 cifs_dbg(FYI, "dentry root is: %p\n", root);
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400725 goto out;
726
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400727out_super:
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400728 deactivate_locked_super(sb);
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400729out:
Jeff Laytonf9e59bc2011-07-06 08:10:37 -0400730 cifs_cleanup_volume_info(volume_info);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000731 return root;
Al Viro5c4f1ad2011-06-17 09:56:55 -0400732
733out_mountdata:
734 kfree(cifs_sb->mountdata);
735out_cifs_sb:
736 kfree(cifs_sb);
737out_nls:
738 unload_nls(volume_info->local_nls);
739 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740}
741
Jeff Layton08bc0352014-05-23 06:50:21 -0400742static ssize_t
743cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter)
744{
745 ssize_t rc;
746 struct inode *inode = file_inode(iocb->ki_filp);
747
748 rc = cifs_revalidate_mapping(inode);
749 if (rc)
750 return rc;
751
752 return generic_file_read_iter(iocb, iter);
753}
754
Al Viro3dae8752014-04-03 12:05:17 -0400755static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
Steve French87c89dd2005-11-17 17:03:00 -0800756{
Al Viro496ad9a2013-01-23 17:07:38 -0500757 struct inode *inode = file_inode(iocb->ki_filp);
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000758 struct cifsInodeInfo *cinode = CIFS_I(inode);
Steve French87c89dd2005-11-17 17:03:00 -0800759 ssize_t written;
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500760 int rc;
Steve French87c89dd2005-11-17 17:03:00 -0800761
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000762 written = cifs_get_writer(cinode);
763 if (written)
764 return written;
765
Al Viro3dae8752014-04-03 12:05:17 -0400766 written = generic_file_write_iter(iocb, from);
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500767
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400768 if (CIFS_CACHE_WRITE(CIFS_I(inode)))
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000769 goto out;
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500770
771 rc = filemap_fdatawrite(inode->i_mapping);
772 if (rc)
Al Viro3dae8752014-04-03 12:05:17 -0400773 cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n",
Joe Perchesf96637b2013-05-04 22:12:25 -0500774 rc, inode);
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500775
Sachin Prabhuc11f1df2014-03-11 16:11:47 +0000776out:
777 cifs_put_writer(cinode);
Steve French87c89dd2005-11-17 17:03:00 -0800778 return written;
779}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780
Andrew Morton965c8e52012-12-17 15:59:39 -0800781static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
Steve Frenchc32a0b62006-01-12 14:41:28 -0800782{
Josef Bacik06222e42011-07-18 13:21:38 -0400783 /*
Andrew Morton965c8e52012-12-17 15:59:39 -0800784 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
Josef Bacik06222e42011-07-18 13:21:38 -0400785 * the cached file length
786 */
Andrew Morton965c8e52012-12-17 15:59:39 -0800787 if (whence != SEEK_SET && whence != SEEK_CUR) {
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400788 int rc;
Al Viro496ad9a2013-01-23 17:07:38 -0500789 struct inode *inode = file_inode(file);
Steve French030e9d82007-02-01 04:27:59 +0000790
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400791 /*
792 * We need to be sure that all dirty pages are written and the
793 * server has the newest file length.
794 */
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400795 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400796 inode->i_mapping->nrpages != 0) {
797 rc = filemap_fdatawait(inode->i_mapping);
Steve French156ecb22011-05-20 17:00:01 +0000798 if (rc) {
799 mapping_set_error(inode->i_mapping, rc);
800 return rc;
801 }
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400802 }
803 /*
804 * Some applications poll for the file length in this strange
805 * way so we must seek to end on non-oplocked files by
806 * setting the revalidate time to zero.
807 */
808 CIFS_I(inode)->time = 0;
Steve French030e9d82007-02-01 04:27:59 +0000809
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400810 rc = cifs_revalidate_file_attr(file);
811 if (rc < 0)
812 return (loff_t)rc;
Steve Frenchc32a0b62006-01-12 14:41:28 -0800813 }
Andrew Morton965c8e52012-12-17 15:59:39 -0800814 return generic_file_llseek(file, offset, whence);
Steve Frenchc32a0b62006-01-12 14:41:28 -0800815}
816
Jeff Laytone6f5c782014-08-22 10:40:25 -0400817static int
818cifs_setlease(struct file *file, long arg, struct file_lock **lease, void **priv)
Steve French84210e92008-10-23 04:42:37 +0000819{
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400820 /*
821 * Note that this is called by vfs setlease with i_lock held to
822 * protect *lease from going away.
823 */
Al Viro496ad9a2013-01-23 17:07:38 -0500824 struct inode *inode = file_inode(file);
Jeff Laytonba00ba62010-09-20 16:01:31 -0700825 struct cifsFileInfo *cfile = file->private_data;
Steve French84210e92008-10-23 04:42:37 +0000826
827 if (!(S_ISREG(inode->i_mode)))
828 return -EINVAL;
829
Jeff Layton02440802014-08-09 10:16:44 -0400830 /* Check if file is oplocked if this is request for new lease */
831 if (arg == F_UNLCK ||
832 ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400833 ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
Jeff Laytone6f5c782014-08-22 10:40:25 -0400834 return generic_setlease(file, arg, lease, priv);
Jeff Layton13cfb732010-09-29 19:51:11 -0400835 else if (tlink_tcon(cfile->tlink)->local_lease &&
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400836 !CIFS_CACHE_READ(CIFS_I(inode)))
837 /*
838 * If the server claims to support oplock on this file, then we
839 * still need to check oplock even if the local_lease mount
840 * option is set, but there are servers which do not support
841 * oplock for which this mount option may be useful if the user
842 * knows that the file won't be changed on the server by anyone
843 * else.
844 */
Jeff Laytone6f5c782014-08-22 10:40:25 -0400845 return generic_setlease(file, arg, lease, priv);
Christoph Hellwig51ee4b82010-10-31 08:35:10 -0400846 else
Steve French84210e92008-10-23 04:42:37 +0000847 return -EAGAIN;
848}
Steve French84210e92008-10-23 04:42:37 +0000849
Igor Mammedove6ab1582008-01-11 01:49:48 +0000850struct file_system_type cifs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 .owner = THIS_MODULE,
852 .name = "cifs",
Al Virod753ed92010-07-26 12:52:33 +0400853 .mount = cifs_do_mount,
Al Viro6d686172011-06-17 08:34:57 -0400854 .kill_sb = cifs_kill_sb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 /* .fs_flags */
856};
Eric W. Biederman3e64fe52013-03-11 07:05:42 -0700857MODULE_ALIAS_FS("cifs");
Arjan van de Ven754661f2007-02-12 00:55:38 -0800858const struct inode_operations cifs_dir_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 .create = cifs_create,
Miklos Szeredid2c12712012-06-05 15:10:23 +0200860 .atomic_open = cifs_atomic_open,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 .lookup = cifs_lookup,
862 .getattr = cifs_getattr,
863 .unlink = cifs_unlink,
864 .link = cifs_hardlink,
865 .mkdir = cifs_mkdir,
866 .rmdir = cifs_rmdir,
Miklos Szeredi7c33d592014-07-23 15:15:36 +0200867 .rename2 = cifs_rename2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 .permission = cifs_permission,
869/* revalidate:cifs_revalidate, */
870 .setattr = cifs_setattr,
871 .symlink = cifs_symlink,
872 .mknod = cifs_mknod,
873#ifdef CONFIG_CIFS_XATTR
874 .setxattr = cifs_setxattr,
875 .getxattr = cifs_getxattr,
876 .listxattr = cifs_listxattr,
877 .removexattr = cifs_removexattr,
878#endif
879};
880
Arjan van de Ven754661f2007-02-12 00:55:38 -0800881const struct inode_operations cifs_file_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882/* revalidate:cifs_revalidate, */
883 .setattr = cifs_setattr,
884 .getattr = cifs_getattr, /* do we need this anymore? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 .permission = cifs_permission,
886#ifdef CONFIG_CIFS_XATTR
887 .setxattr = cifs_setxattr,
888 .getxattr = cifs_getxattr,
889 .listxattr = cifs_listxattr,
890 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000891#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892};
893
Arjan van de Ven754661f2007-02-12 00:55:38 -0800894const struct inode_operations cifs_symlink_inode_ops = {
Steve French50c2f752007-07-13 00:33:32 +0000895 .readlink = generic_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 .follow_link = cifs_follow_link,
Al Viro87dc8002013-09-16 10:30:04 -0400897 .put_link = kfree_put_link,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 .permission = cifs_permission,
899 /* BB add the following two eventually */
900 /* revalidate: cifs_revalidate,
901 setattr: cifs_notify_change, *//* BB do we need notify change */
902#ifdef CONFIG_CIFS_XATTR
903 .setxattr = cifs_setxattr,
904 .getxattr = cifs_getxattr,
905 .listxattr = cifs_listxattr,
906 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000907#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908};
909
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800910const struct file_operations cifs_file_ops = {
Jeff Layton08bc0352014-05-23 06:50:21 -0400911 .read_iter = cifs_loose_read_iter,
Al Viro3dae8752014-04-03 12:05:17 -0400912 .write_iter = cifs_file_write_iter,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 .open = cifs_open,
914 .release = cifs_close,
915 .lock = cifs_lock,
916 .fsync = cifs_fsync,
917 .flush = cifs_flush,
918 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200919 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800920 .llseek = cifs_llseek,
Steve Frenchc67593a2005-04-28 22:41:04 -0700921#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000922 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700923#endif /* CONFIG_CIFS_POSIX */
Steve French84210e92008-10-23 04:42:37 +0000924 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -0500925 .fallocate = cifs_fallocate,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926};
927
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300928const struct file_operations cifs_file_strict_ops = {
Al Viroe6a7bcb2014-04-02 19:53:36 -0400929 .read_iter = cifs_strict_readv,
Al Viro3dae8752014-04-03 12:05:17 -0400930 .write_iter = cifs_strict_writev,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300931 .open = cifs_open,
932 .release = cifs_close,
933 .lock = cifs_lock,
934 .fsync = cifs_strict_fsync,
935 .flush = cifs_flush,
Pavel Shilovsky7a6a19b2010-12-14 11:29:51 +0300936 .mmap = cifs_file_strict_mmap,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300937 .splice_read = generic_file_splice_read,
938 .llseek = cifs_llseek,
939#ifdef CONFIG_CIFS_POSIX
940 .unlocked_ioctl = cifs_ioctl,
941#endif /* CONFIG_CIFS_POSIX */
942 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -0500943 .fallocate = cifs_fallocate,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300944};
945
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800946const struct file_operations cifs_file_direct_ops = {
Pavel Shilovsky0b81c1c2011-03-10 10:11:05 +0300947 /* BB reevaluate whether they can be done with directio, no cache */
Al Viroe6a7bcb2014-04-02 19:53:36 -0400948 .read_iter = cifs_user_readv,
Al Viro3dae8752014-04-03 12:05:17 -0400949 .write_iter = cifs_user_writev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 .open = cifs_open,
951 .release = cifs_close,
952 .lock = cifs_lock,
953 .fsync = cifs_fsync,
954 .flush = cifs_flush,
Steve Frencha994b8f2009-12-07 05:44:46 +0000955 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200956 .splice_read = generic_file_splice_read,
Steve Frenchc67593a2005-04-28 22:41:04 -0700957#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000958 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700959#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -0800960 .llseek = cifs_llseek,
Steve French84210e92008-10-23 04:42:37 +0000961 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -0500962 .fallocate = cifs_fallocate,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963};
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300964
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800965const struct file_operations cifs_file_nobrl_ops = {
Jeff Layton08bc0352014-05-23 06:50:21 -0400966 .read_iter = cifs_loose_read_iter,
Al Viro3dae8752014-04-03 12:05:17 -0400967 .write_iter = cifs_file_write_iter,
Steve French87c89dd2005-11-17 17:03:00 -0800968 .open = cifs_open,
969 .release = cifs_close,
970 .fsync = cifs_fsync,
971 .flush = cifs_flush,
972 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200973 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800974 .llseek = cifs_llseek,
Steve French8b94bcb2005-11-11 11:41:00 -0800975#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000976 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -0800977#endif /* CONFIG_CIFS_POSIX */
Steve French84210e92008-10-23 04:42:37 +0000978 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -0500979 .fallocate = cifs_fallocate,
Steve French8b94bcb2005-11-11 11:41:00 -0800980};
981
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300982const struct file_operations cifs_file_strict_nobrl_ops = {
Al Viroe6a7bcb2014-04-02 19:53:36 -0400983 .read_iter = cifs_strict_readv,
Al Viro3dae8752014-04-03 12:05:17 -0400984 .write_iter = cifs_strict_writev,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300985 .open = cifs_open,
986 .release = cifs_close,
987 .fsync = cifs_strict_fsync,
988 .flush = cifs_flush,
Pavel Shilovsky7a6a19b2010-12-14 11:29:51 +0300989 .mmap = cifs_file_strict_mmap,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300990 .splice_read = generic_file_splice_read,
991 .llseek = cifs_llseek,
992#ifdef CONFIG_CIFS_POSIX
993 .unlocked_ioctl = cifs_ioctl,
994#endif /* CONFIG_CIFS_POSIX */
995 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -0500996 .fallocate = cifs_fallocate,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300997};
998
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800999const struct file_operations cifs_file_direct_nobrl_ops = {
Pavel Shilovsky0b81c1c2011-03-10 10:11:05 +03001000 /* BB reevaluate whether they can be done with directio, no cache */
Al Viroe6a7bcb2014-04-02 19:53:36 -04001001 .read_iter = cifs_user_readv,
Al Viro3dae8752014-04-03 12:05:17 -04001002 .write_iter = cifs_user_writev,
Steve French87c89dd2005-11-17 17:03:00 -08001003 .open = cifs_open,
1004 .release = cifs_close,
1005 .fsync = cifs_fsync,
1006 .flush = cifs_flush,
Pavel Shilovsky810627a02010-03-27 02:00:49 +00001007 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +02001008 .splice_read = generic_file_splice_read,
Steve French8b94bcb2005-11-11 11:41:00 -08001009#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +00001010 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -08001011#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -08001012 .llseek = cifs_llseek,
Steve French84210e92008-10-23 04:42:37 +00001013 .setlease = cifs_setlease,
Steve French31742c52014-08-17 08:38:47 -05001014 .fallocate = cifs_fallocate,
Steve French8b94bcb2005-11-11 11:41:00 -08001015};
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -08001017const struct file_operations cifs_dir_ops = {
Al Virobe4ccdc2013-05-22 16:17:25 -04001018 .iterate = cifs_readdir,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 .release = cifs_closedir,
1020 .read = generic_read_dir,
Steve Frenchf9ddcca2008-05-15 05:51:55 +00001021 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig3222a3e2008-09-03 21:53:01 +02001022 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023};
1024
1025static void
Alexey Dobriyan51cc5062008-07-25 19:45:34 -07001026cifs_init_once(void *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027{
1028 struct cifsInodeInfo *cifsi = inode;
1029
Christoph Lametera35afb82007-05-16 22:10:57 -07001030 inode_init_once(&cifsi->vfs_inode);
Pavel Shilovsky1b4b55a2012-09-19 06:22:44 -07001031 init_rwsem(&cifsi->lock_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032}
1033
Fabian Frederick9ee108b2014-04-03 14:46:30 -07001034static int __init
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035cifs_init_inodecache(void)
1036{
1037 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
Steve French26f57362007-08-30 22:09:15 +00001038 sizeof(struct cifsInodeInfo),
Paul Jacksonfffb60f2006-03-24 03:16:06 -08001039 0, (SLAB_RECLAIM_ACCOUNT|
1040 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +09001041 cifs_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 if (cifs_inode_cachep == NULL)
1043 return -ENOMEM;
1044
1045 return 0;
1046}
1047
1048static void
1049cifs_destroy_inodecache(void)
1050{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +10001051 /*
1052 * Make sure all delayed rcu free inodes are flushed before we
1053 * destroy cache.
1054 */
1055 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001056 kmem_cache_destroy(cifs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057}
1058
1059static int
1060cifs_init_request_bufs(void)
1061{
Pavel Shilovsky3792c172012-01-12 22:40:50 +04001062 size_t max_hdr_size = MAX_CIFS_HDR_SIZE;
1063#ifdef CONFIG_CIFS_SMB2
1064 /*
1065 * SMB2 maximum header size is bigger than CIFS one - no problems to
1066 * allocate some more bytes for CIFS.
1067 */
1068 max_hdr_size = MAX_SMB2_HDR_SIZE;
1069#endif
Steve French4523cc32007-04-30 20:13:06 +00001070 if (CIFSMaxBufSize < 8192) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1072 Unicode path name has to fit in any SMB/CIFS path based frames */
1073 CIFSMaxBufSize = 8192;
1074 } else if (CIFSMaxBufSize > 1024*127) {
1075 CIFSMaxBufSize = 1024 * 127;
1076 } else {
1077 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1078 }
Joe Perchesf96637b2013-05-04 22:12:25 -05001079/*
1080 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
1081 CIFSMaxBufSize, CIFSMaxBufSize);
1082*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 cifs_req_cachep = kmem_cache_create("cifs_request",
Pavel Shilovsky3792c172012-01-12 22:40:50 +04001084 CIFSMaxBufSize + max_hdr_size, 0,
Paul Mundt20c2df82007-07-20 10:11:58 +09001085 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 if (cifs_req_cachep == NULL)
1087 return -ENOMEM;
1088
Steve French4523cc32007-04-30 20:13:06 +00001089 if (cifs_min_rcv < 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 cifs_min_rcv = 1;
1091 else if (cifs_min_rcv > 64) {
1092 cifs_min_rcv = 64;
Joe Perchesf96637b2013-05-04 22:12:25 -05001093 cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 }
1095
Matthew Dobson93d23412006-03-26 01:37:50 -08001096 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1097 cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
Steve French4523cc32007-04-30 20:13:06 +00001099 if (cifs_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 kmem_cache_destroy(cifs_req_cachep);
1101 return -ENOMEM;
1102 }
Steve Frenchec637e32005-12-12 20:53:18 -08001103 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 almost all handle based requests (but not write response, nor is it
1105 sufficient for path based requests). A smaller size would have
Steve French50c2f752007-07-13 00:33:32 +00001106 been more efficient (compacting multiple slab items on one 4k page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 for the case in which debug was on, but this larger size allows
1108 more SMBs to use small buffer alloc and is still much more
Steve French6dc0f872007-07-06 23:13:06 +00001109 efficient to alloc 1 per page off the slab compared to 17K (5page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 alloc of large cifs buffers even when page debugging is on */
1111 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
Steve French6dc0f872007-07-06 23:13:06 +00001112 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +09001113 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 if (cifs_sm_req_cachep == NULL) {
1115 mempool_destroy(cifs_req_poolp);
1116 kmem_cache_destroy(cifs_req_cachep);
Steve French6dc0f872007-07-06 23:13:06 +00001117 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 }
1119
Steve French4523cc32007-04-30 20:13:06 +00001120 if (cifs_min_small < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 cifs_min_small = 2;
1122 else if (cifs_min_small > 256) {
1123 cifs_min_small = 256;
Joe Perchesf96637b2013-05-04 22:12:25 -05001124 cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 }
1126
Matthew Dobson93d23412006-03-26 01:37:50 -08001127 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1128 cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129
Steve French4523cc32007-04-30 20:13:06 +00001130 if (cifs_sm_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 mempool_destroy(cifs_req_poolp);
1132 kmem_cache_destroy(cifs_req_cachep);
1133 kmem_cache_destroy(cifs_sm_req_cachep);
1134 return -ENOMEM;
1135 }
1136
1137 return 0;
1138}
1139
1140static void
1141cifs_destroy_request_bufs(void)
1142{
1143 mempool_destroy(cifs_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001144 kmem_cache_destroy(cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 mempool_destroy(cifs_sm_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001146 kmem_cache_destroy(cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147}
1148
1149static int
1150cifs_init_mids(void)
1151{
1152 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
Steve French26f57362007-08-30 22:09:15 +00001153 sizeof(struct mid_q_entry), 0,
1154 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 if (cifs_mid_cachep == NULL)
1156 return -ENOMEM;
1157
Matthew Dobson93d23412006-03-26 01:37:50 -08001158 /* 3 is a reasonable minimum number of simultaneous operations */
1159 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
Steve French4523cc32007-04-30 20:13:06 +00001160 if (cifs_mid_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 kmem_cache_destroy(cifs_mid_cachep);
1162 return -ENOMEM;
1163 }
1164
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 return 0;
1166}
1167
1168static void
1169cifs_destroy_mids(void)
1170{
1171 mempool_destroy(cifs_mid_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001172 kmem_cache_destroy(cifs_mid_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173}
1174
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175static int __init
1176init_cifs(void)
1177{
1178 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 cifs_proc_init();
Jeff Laytone7ddee92008-11-14 13:44:38 -05001180 INIT_LIST_HEAD(&cifs_tcp_ses_list);
Steve French0eff0e22011-02-24 05:39:23 +00001181#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
Steve French4ca9c192005-10-10 19:52:13 -07001182 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1183 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
Steve French0eff0e22011-02-24 05:39:23 +00001184#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185/*
1186 * Initialize Global counters
1187 */
1188 atomic_set(&sesInfoAllocCount, 0);
1189 atomic_set(&tconInfoAllocCount, 0);
Steve French6dc0f872007-07-06 23:13:06 +00001190 atomic_set(&tcpSesAllocCount, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 atomic_set(&tcpSesReconnectCount, 0);
1192 atomic_set(&tconInfoReconnectCount, 0);
1193
1194 atomic_set(&bufAllocCount, 0);
Steve French4498eed52005-12-03 13:58:57 -08001195 atomic_set(&smBufAllocCount, 0);
1196#ifdef CONFIG_CIFS_STATS2
1197 atomic_set(&totBufAllocCount, 0);
1198 atomic_set(&totSmBufAllocCount, 0);
1199#endif /* CONFIG_CIFS_STATS2 */
1200
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 atomic_set(&midCount, 0);
1202 GlobalCurrentXid = 0;
1203 GlobalTotalActiveXid = 0;
1204 GlobalMaxActiveXid = 0;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301205 spin_lock_init(&cifs_tcp_ses_lock);
Jeff Layton44772882010-10-15 15:34:03 -04001206 spin_lock_init(&cifs_file_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 spin_lock_init(&GlobalMid_Lock);
1208
Steve French4523cc32007-04-30 20:13:06 +00001209 if (cifs_max_pending < 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 cifs_max_pending = 2;
Joe Perchesf96637b2013-05-04 22:12:25 -05001211 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
Pavel Shilovsky10b9b982012-03-20 12:55:09 +03001212 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1213 cifs_max_pending = CIFS_MAX_REQ;
Joe Perchesf96637b2013-05-04 22:12:25 -05001214 cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
1215 CIFS_MAX_REQ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 }
1217
Jeff Laytonda472fc2012-03-23 14:40:53 -04001218 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1219 if (!cifsiod_wq) {
1220 rc = -ENOMEM;
1221 goto out_clean_proc;
1222 }
1223
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301224 rc = cifs_fscache_register();
1225 if (rc)
Jeff Laytonda472fc2012-03-23 14:40:53 -04001226 goto out_destroy_wq;
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301227
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 rc = cifs_init_inodecache();
Steve French45af7a02006-04-21 22:52:25 +00001229 if (rc)
Steve Frenchd3bf5222010-09-22 19:15:36 +00001230 goto out_unreg_fscache;
Steve French45af7a02006-04-21 22:52:25 +00001231
1232 rc = cifs_init_mids();
1233 if (rc)
1234 goto out_destroy_inodecache;
1235
1236 rc = cifs_init_request_bufs();
1237 if (rc)
1238 goto out_destroy_mids;
1239
Jeff Layton84a15b92007-11-03 05:02:24 +00001240#ifdef CONFIG_CIFS_UPCALL
1241 rc = register_key_type(&cifs_spnego_key_type);
1242 if (rc)
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001243 goto out_destroy_request_bufs;
1244#endif /* CONFIG_CIFS_UPCALL */
1245
1246#ifdef CONFIG_CIFS_ACL
1247 rc = init_cifs_idmap();
1248 if (rc)
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001249 goto out_register_key_type;
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001250#endif /* CONFIG_CIFS_ACL */
1251
1252 rc = register_filesystem(&cifs_fs_type);
1253 if (rc)
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001254 goto out_init_cifs_idmap;
Steve French45af7a02006-04-21 22:52:25 +00001255
Steve French45af7a02006-04-21 22:52:25 +00001256 return 0;
1257
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001258out_init_cifs_idmap:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001259#ifdef CONFIG_CIFS_ACL
1260 exit_cifs_idmap();
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001261out_register_key_type:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001262#endif
1263#ifdef CONFIG_CIFS_UPCALL
1264 unregister_key_type(&cifs_spnego_key_type);
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001265out_destroy_request_bufs:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001266#endif
Steve French45af7a02006-04-21 22:52:25 +00001267 cifs_destroy_request_bufs();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001268out_destroy_mids:
Steve French45af7a02006-04-21 22:52:25 +00001269 cifs_destroy_mids();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001270out_destroy_inodecache:
Steve French45af7a02006-04-21 22:52:25 +00001271 cifs_destroy_inodecache();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001272out_unreg_fscache:
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301273 cifs_fscache_unregister();
Jeff Laytonda472fc2012-03-23 14:40:53 -04001274out_destroy_wq:
1275 destroy_workqueue(cifsiod_wq);
Steve Frenchd3bf5222010-09-22 19:15:36 +00001276out_clean_proc:
1277 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 return rc;
1279}
1280
1281static void __exit
1282exit_cifs(void)
1283{
Joe Perchesf96637b2013-05-04 22:12:25 -05001284 cifs_dbg(NOISY, "exit_cifs\n");
Jeff Layton3dd93302012-03-21 06:27:55 -04001285 unregister_filesystem(&cifs_fs_type);
Igor Mammedov78d31a32008-04-24 12:56:07 +04001286 cifs_dfs_release_automount_timer();
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001287#ifdef CONFIG_CIFS_ACL
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001288 exit_cifs_idmap();
1289#endif
Jeff Layton84a15b92007-11-03 05:02:24 +00001290#ifdef CONFIG_CIFS_UPCALL
1291 unregister_key_type(&cifs_spnego_key_type);
1292#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 cifs_destroy_request_bufs();
Jeff Layton3dd93302012-03-21 06:27:55 -04001294 cifs_destroy_mids();
1295 cifs_destroy_inodecache();
1296 cifs_fscache_unregister();
Jeff Laytonda472fc2012-03-23 14:40:53 -04001297 destroy_workqueue(cifsiod_wq);
Jeff Layton3dd93302012-03-21 06:27:55 -04001298 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299}
1300
1301MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
Steve French6dc0f872007-07-06 23:13:06 +00001302MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303MODULE_DESCRIPTION
Steve French63135e02007-07-17 17:34:02 +00001304 ("VFS to access servers complying with the SNIA CIFS Specification "
1305 "e.g. Samba and Windows");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306MODULE_VERSION(CIFS_VERSION);
1307module_init(init_cifs)
1308module_exit(exit_cifs)