blob: 849f6132b327e5e79e35bd4a178784eea001b267 [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
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -070090#ifdef CONFIG_CIFS_SMB2
91__u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE];
92#endif
93
Mateusz Guzik24261fc2013-03-08 16:30:03 +010094/*
95 * Bumps refcount for cifs super block.
96 * Note that it should be only called if a referece to VFS super block is
97 * already held, e.g. in open-type syscalls context. Otherwise it can race with
98 * atomic_dec_and_test in deactivate_locked_super.
99 */
100void
101cifs_sb_active(struct super_block *sb)
102{
103 struct cifs_sb_info *server = CIFS_SB(sb);
104
105 if (atomic_inc_return(&server->active) == 1)
106 atomic_inc(&sb->s_active);
107}
108
109void
110cifs_sb_deactive(struct super_block *sb)
111{
112 struct cifs_sb_info *server = CIFS_SB(sb);
113
114 if (atomic_dec_and_test(&server->active))
115 deactivate_super(sb);
116}
117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118static int
Al Viro97d11522011-06-17 09:29:57 -0400119cifs_read_super(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120{
121 struct inode *inode;
Pavel Shilovskyb2e5cd32011-05-25 13:35:34 +0400122 struct cifs_sb_info *cifs_sb;
Jan Klos2f6c9472013-10-06 21:08:20 +0200123 struct cifs_tcon *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 int rc = 0;
Steve French50c2f752007-07-13 00:33:32 +0000125
Pavel Shilovskyb2e5cd32011-05-25 13:35:34 +0400126 cifs_sb = CIFS_SB(sb);
Jan Klos2f6c9472013-10-06 21:08:20 +0200127 tcon = cifs_sb_master_tcon(cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
Al Viro2c6292a2011-06-17 09:05:48 -0400129 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL)
130 sb->s_flags |= MS_POSIXACL;
131
Jan Klos2f6c9472013-10-06 21:08:20 +0200132 if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files)
Al Viro2c6292a2011-06-17 09:05:48 -0400133 sb->s_maxbytes = MAX_LFS_FILESIZE;
134 else
135 sb->s_maxbytes = MAX_NON_LFS;
136
137 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
138 sb->s_time_gran = 100;
139
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 sb->s_magic = CIFS_MAGIC_NUMBER;
141 sb->s_op = &cifs_super_ops;
Jens Axboe8044f7f2010-04-22 12:09:48 +0200142 sb->s_bdi = &cifs_sb->bdi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 sb->s_blocksize = CIFS_MAX_MSGSIZE;
144 sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */
Shirish Pargaonkar9b6763e2011-02-21 23:56:59 -0600145 inode = cifs_root_iget(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
David Howellsce634ab2008-02-07 00:15:33 -0800147 if (IS_ERR(inode)) {
148 rc = PTR_ERR(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 goto out_no_root;
150 }
151
Jan Klos2f6c9472013-10-06 21:08:20 +0200152 if (tcon->nocase)
Jeff Layton66ffd112013-07-30 11:38:44 -0400153 sb->s_d_op = &cifs_ci_dentry_ops;
154 else
155 sb->s_d_op = &cifs_dentry_ops;
156
Al Viro48fde702012-01-08 22:15:13 -0500157 sb->s_root = d_make_root(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 if (!sb->s_root) {
159 rc = -ENOMEM;
160 goto out_no_root;
161 }
Steve French50c2f752007-07-13 00:33:32 +0000162
Paul Bollef3a6a602011-10-12 14:14:04 +0200163#ifdef CONFIG_CIFS_NFSD_EXPORT
Steve French7521a3c2007-07-11 18:30:34 +0000164 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500165 cifs_dbg(FYI, "export ops supported\n");
Steve French7521a3c2007-07-11 18:30:34 +0000166 sb->s_export_op = &cifs_export_ops;
167 }
Paul Bollef3a6a602011-10-12 14:14:04 +0200168#endif /* CONFIG_CIFS_NFSD_EXPORT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
170 return 0;
171
172out_no_root:
Joe Perchesf96637b2013-05-04 22:12:25 -0500173 cifs_dbg(VFS, "%s: get root inode failed\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 return rc;
175}
176
Al Viro6d686172011-06-17 08:34:57 -0400177static void cifs_kill_sb(struct super_block *sb)
178{
179 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
180 kill_anon_super(sb);
Al Viro98ab4942011-06-17 09:32:10 -0400181 cifs_umount(cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182}
183
184static int
David Howells726c3342006-06-23 02:02:58 -0700185cifs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186{
David Howells726c3342006-06-23 02:02:58 -0700187 struct super_block *sb = dentry->d_sb;
Steve French39da9842008-04-28 04:04:34 +0000188 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French96daf2b2011-05-27 04:34:02 +0000189 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700190 struct TCP_Server_Info *server = tcon->ses->server;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400191 unsigned int xid;
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700192 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400194 xid = get_xid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
Steve French39da9842008-04-28 04:04:34 +0000196 /*
197 * PATH_MAX may be too long - it would presumably be total path,
198 * but note that some servers (includinng Samba 3) have a shorter
199 * maximum path.
200 *
201 * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO.
202 */
203 buf->f_namelen = PATH_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 buf->f_files = 0; /* undefined */
205 buf->f_ffree = 0; /* unlimited */
206
Pavel Shilovsky76ec5e32012-09-18 16:20:33 -0700207 if (server->ops->queryfs)
208 rc = server->ops->queryfs(xid, tcon, buf);
Steve French39da9842008-04-28 04:04:34 +0000209
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400210 free_xid(xid);
Steve French39da9842008-04-28 04:04:34 +0000211 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212}
213
Al Viro10556cb2011-06-20 19:28:19 -0400214static int cifs_permission(struct inode *inode, int mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215{
216 struct cifs_sb_info *cifs_sb;
217
218 cifs_sb = CIFS_SB(inode->i_sb);
219
Miklos Szeredif696a362008-07-31 13:41:58 +0200220 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
221 if ((mask & MAY_EXEC) && !execute_ok(inode))
222 return -EACCES;
223 else
224 return 0;
225 } else /* file mode might have been restricted at mount time
Steve French50c2f752007-07-13 00:33:32 +0000226 on the client (above and beyond ACL on servers) for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 servers which do not support setting and viewing mode bits,
Steve French50c2f752007-07-13 00:33:32 +0000228 so allowing client to check permissions is useful */
Al Viro2830ba72011-06-20 19:16:29 -0400229 return generic_permission(inode, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230}
231
Christoph Lametere18b8902006-12-06 20:33:20 -0800232static struct kmem_cache *cifs_inode_cachep;
233static struct kmem_cache *cifs_req_cachep;
234static struct kmem_cache *cifs_mid_cachep;
Christoph Lametere18b8902006-12-06 20:33:20 -0800235static struct kmem_cache *cifs_sm_req_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236mempool_t *cifs_sm_req_poolp;
237mempool_t *cifs_req_poolp;
238mempool_t *cifs_mid_poolp;
239
240static struct inode *
241cifs_alloc_inode(struct super_block *sb)
242{
243 struct cifsInodeInfo *cifs_inode;
Christoph Lametere94b1762006-12-06 20:33:17 -0800244 cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 if (!cifs_inode)
246 return NULL;
247 cifs_inode->cifsAttrs = 0x20; /* default */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 cifs_inode->time = 0;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700249 /*
250 * Until the file is open and we have gotten oplock info back from the
251 * server, can not assume caching of file data or metadata.
252 */
Pavel Shilovskyc6723622010-11-03 10:58:57 +0300253 cifs_set_oplock_level(cifs_inode, 0);
Jeff Layton9a8165f2008-10-17 21:03:20 -0400254 cifs_inode->delete_pending = false;
Jeff Laytondf2cf172010-02-12 07:44:16 -0500255 cifs_inode->invalid_mapping = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
Jeff Laytonfbec9ab2009-04-03 13:44:00 -0400257 cifs_inode->server_eof = 0;
Jeff Layton20054bd2011-01-07 11:30:27 -0500258 cifs_inode->uniqueid = 0;
259 cifs_inode->createtime = 0;
Pavel Shilovsky42873b02013-09-05 21:30:16 +0400260 cifs_inode->epoch = 0;
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -0700261#ifdef CONFIG_CIFS_SMB2
262 get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE);
263#endif
264 /*
265 * Can not set i_flags here - they get immediately overwritten to zero
266 * by the VFS.
267 */
268 /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 INIT_LIST_HEAD(&cifs_inode->openFileList);
Pavel Shilovskyf45d3412012-09-19 06:22:43 -0700270 INIT_LIST_HEAD(&cifs_inode->llist);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 return &cifs_inode->vfs_inode;
272}
273
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100274static void cifs_i_callback(struct rcu_head *head)
275{
276 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100277 kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
278}
279
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280static void
281cifs_destroy_inode(struct inode *inode)
282{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100283 call_rcu(&inode->i_rcu, cifs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284}
285
Jeff Layton61f98ff2009-06-11 10:27:32 -0400286static void
Al Virob57922d2010-06-07 14:34:48 -0400287cifs_evict_inode(struct inode *inode)
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530288{
Al Virob57922d2010-06-07 14:34:48 -0400289 truncate_inode_pages(&inode->i_data, 0);
Jan Karadbd57682012-05-03 14:48:02 +0200290 clear_inode(inode);
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530291 cifs_fscache_release_inode_cookie(inode);
292}
293
294static void
Jeff Layton61f98ff2009-06-11 10:27:32 -0400295cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
296{
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300297 struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr;
298 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr;
299
Jeff Layton61f98ff2009-06-11 10:27:32 -0400300 seq_printf(s, ",addr=");
301
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300302 switch (server->dstaddr.ss_family) {
Jeff Layton61f98ff2009-06-11 10:27:32 -0400303 case AF_INET:
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300304 seq_printf(s, "%pI4", &sa->sin_addr.s_addr);
Jeff Layton61f98ff2009-06-11 10:27:32 -0400305 break;
306 case AF_INET6:
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300307 seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr);
308 if (sa6->sin6_scope_id)
309 seq_printf(s, "%%%u", sa6->sin6_scope_id);
Jeff Layton61f98ff2009-06-11 10:27:32 -0400310 break;
311 default:
312 seq_printf(s, "(unknown)");
313 }
314}
315
Jeff Layton3e715512011-06-13 11:50:41 -0400316static void
Jeff Layton28e11bd2013-05-26 07:01:00 -0400317cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
Jeff Layton3e715512011-06-13 11:50:41 -0400318{
Jeff Layton28e11bd2013-05-26 07:01:00 -0400319 if (ses->sectype == Unspecified)
320 return;
321
Jeff Layton3e715512011-06-13 11:50:41 -0400322 seq_printf(s, ",sec=");
323
Jeff Layton28e11bd2013-05-26 07:01:00 -0400324 switch (ses->sectype) {
Jeff Layton3e715512011-06-13 11:50:41 -0400325 case LANMAN:
326 seq_printf(s, "lanman");
327 break;
328 case NTLMv2:
329 seq_printf(s, "ntlmv2");
330 break;
331 case NTLM:
332 seq_printf(s, "ntlm");
333 break;
334 case Kerberos:
335 seq_printf(s, "krb5");
336 break;
337 case RawNTLMSSP:
338 seq_printf(s, "ntlmssp");
339 break;
340 default:
341 /* shouldn't ever happen */
342 seq_printf(s, "unknown");
343 break;
344 }
345
Jeff Layton28e11bd2013-05-26 07:01:00 -0400346 if (ses->sign)
Jeff Layton3e715512011-06-13 11:50:41 -0400347 seq_printf(s, "i");
348}
349
Jeff Laytond06b5052012-05-16 07:53:01 -0400350static void
351cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb)
352{
353 seq_printf(s, ",cache=");
354
355 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO)
356 seq_printf(s, "strict");
357 else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO)
358 seq_printf(s, "none");
359 else
360 seq_printf(s, "loose");
361}
362
Jeff Layton3ae35cd2013-07-30 13:34:40 -0400363static void
364cifs_show_nls(struct seq_file *s, struct nls_table *cur)
365{
366 struct nls_table *def;
367
368 /* Display iocharset= option if it's not default charset */
369 def = load_nls_default();
370 if (def != cur)
371 seq_printf(s, ",iocharset=%s", cur->charset);
372 unload_nls(def);
373}
374
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375/*
376 * cifs_show_options() is for displaying mount options in /proc/mounts.
377 * Not all settable options are displayed but most of the important
378 * ones are.
379 */
380static int
Al Viro34c80b12011-12-08 21:32:45 -0500381cifs_show_options(struct seq_file *s, struct dentry *root)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382{
Al Viro34c80b12011-12-08 21:32:45 -0500383 struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);
Steve French96daf2b2011-05-27 04:34:02 +0000384 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
Ben Greear3eb9a882010-09-01 17:06:02 -0700385 struct sockaddr *srcaddr;
386 srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Jeff Layton23db65f2012-05-15 12:20:51 -0400388 seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string);
Jeff Layton28e11bd2013-05-26 07:01:00 -0400389 cifs_show_security(s, tcon->ses);
Jeff Laytond06b5052012-05-16 07:53:01 -0400390 cifs_show_cache_flavor(s, cifs_sb);
Jeff Layton3e715512011-06-13 11:50:41 -0400391
Jeff Layton29e07c82010-09-29 19:51:12 -0400392 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
393 seq_printf(s, ",multiuser");
Steve French8727c8a2011-02-25 01:11:56 -0600394 else if (tcon->ses->user_name)
395 seq_printf(s, ",username=%s", tcon->ses->user_name);
Jeff Layton29e07c82010-09-29 19:51:12 -0400396
Jeff Layton8616e0f2009-06-11 10:27:28 -0400397 if (tcon->ses->domainName)
398 seq_printf(s, ",domain=%s", tcon->ses->domainName);
399
Ben Greear3eb9a882010-09-01 17:06:02 -0700400 if (srcaddr->sa_family != AF_UNSPEC) {
401 struct sockaddr_in *saddr4;
402 struct sockaddr_in6 *saddr6;
403 saddr4 = (struct sockaddr_in *)srcaddr;
404 saddr6 = (struct sockaddr_in6 *)srcaddr;
405 if (srcaddr->sa_family == AF_INET6)
406 seq_printf(s, ",srcaddr=%pI6c",
407 &saddr6->sin6_addr);
408 else if (srcaddr->sa_family == AF_INET)
409 seq_printf(s, ",srcaddr=%pI4",
410 &saddr4->sin_addr.s_addr);
411 else
412 seq_printf(s, ",srcaddr=BAD-AF:%i",
413 (int)(srcaddr->sa_family));
414 }
415
Eric W. Biederman1f682332013-02-06 01:20:20 -0800416 seq_printf(s, ",uid=%u",
417 from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid));
Jeff Layton340481a32009-06-11 10:27:29 -0400418 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
419 seq_printf(s, ",forceuid");
Jeff Layton4486d6e2009-08-03 12:45:10 -0400420 else
421 seq_printf(s, ",noforceuid");
Jeff Layton340481a32009-06-11 10:27:29 -0400422
Eric W. Biederman1f682332013-02-06 01:20:20 -0800423 seq_printf(s, ",gid=%u",
424 from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid));
Jeff Layton340481a32009-06-11 10:27:29 -0400425 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
426 seq_printf(s, ",forcegid");
Jeff Layton4486d6e2009-08-03 12:45:10 -0400427 else
428 seq_printf(s, ",noforcegid");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400429
Jeff Layton61f98ff2009-06-11 10:27:32 -0400430 cifs_show_address(s, tcon->ses->server);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400431
432 if (!tcon->unix_ext)
Al Viro5206efd2011-07-26 03:22:14 -0400433 seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho",
Steve French2b280fa2008-05-17 03:12:45 +0000434 cifs_sb->mnt_file_mode,
435 cifs_sb->mnt_dir_mode);
Jeff Layton3ae35cd2013-07-30 13:34:40 -0400436
437 cifs_show_nls(s, cifs_sb->local_nls);
438
Jeff Layton8616e0f2009-06-11 10:27:28 -0400439 if (tcon->seal)
440 seq_printf(s, ",seal");
441 if (tcon->nocase)
442 seq_printf(s, ",nocase");
443 if (tcon->retry)
444 seq_printf(s, ",hard");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000445 if (tcon->unix_ext)
446 seq_printf(s, ",unix");
447 else
448 seq_printf(s, ",nounix");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400449 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
450 seq_printf(s, ",posixpaths");
451 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
452 seq_printf(s, ",setuids");
453 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
454 seq_printf(s, ",serverino");
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +0000455 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
456 seq_printf(s, ",rwpidforward");
457 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL)
458 seq_printf(s, ",forcemand");
Jeff Layton8616e0f2009-06-11 10:27:28 -0400459 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
460 seq_printf(s, ",nouser_xattr");
461 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
462 seq_printf(s, ",mapchars");
463 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)
464 seq_printf(s, ",sfu");
465 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
466 seq_printf(s, ",nobrl");
467 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
468 seq_printf(s, ",cifsacl");
469 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)
470 seq_printf(s, ",dynperm");
Al Viro34c80b12011-12-08 21:32:45 -0500471 if (root->d_sb->s_flags & MS_POSIXACL)
Jeff Layton8616e0f2009-06-11 10:27:28 -0400472 seq_printf(s, ",acl");
Stefan Metzmacher736a3322010-07-30 14:56:00 +0200473 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
474 seq_printf(s, ",mfsymlinks");
Suresh Jayaraman476428f2010-11-24 17:49:07 +0530475 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE)
476 seq_printf(s, ",fsc");
Steve French71c424b2011-10-19 20:44:48 -0500477 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)
478 seq_printf(s, ",nostrictsync");
479 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
480 seq_printf(s, ",noperm");
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +0100481 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID)
Eric W. Biederman1f682332013-02-06 01:20:20 -0800482 seq_printf(s, ",backupuid=%u",
483 from_kuid_munged(&init_user_ns,
484 cifs_sb->mnt_backupuid));
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +0100485 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID)
Eric W. Biederman1f682332013-02-06 01:20:20 -0800486 seq_printf(s, ",backupgid=%u",
487 from_kgid_munged(&init_user_ns,
488 cifs_sb->mnt_backupgid));
Steve French2b280fa2008-05-17 03:12:45 +0000489
Sachin Prabhu28f88812012-04-24 15:28:30 +0100490 seq_printf(s, ",rsize=%u", cifs_sb->rsize);
491 seq_printf(s, ",wsize=%u", cifs_sb->wsize);
Suresh Jayaraman6d20e842010-12-01 14:42:28 +0530492 /* convert actimeo and display it in seconds */
Sachin Prabhu156d1792012-04-25 12:10:14 +0100493 seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
Jeff Layton8616e0f2009-06-11 10:27:28 -0400494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 return 0;
496}
497
Al Viro42faad92008-04-24 07:21:56 -0400498static void cifs_umount_begin(struct super_block *sb)
Steve French68058e72005-10-10 10:34:22 -0700499{
Al Viro42faad92008-04-24 07:21:56 -0400500 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Steve French96daf2b2011-05-27 04:34:02 +0000501 struct cifs_tcon *tcon;
Steve French68058e72005-10-10 10:34:22 -0700502
Steve French4523cc32007-04-30 20:13:06 +0000503 if (cifs_sb == NULL)
Steve French9e2e85f2005-10-10 14:28:38 -0700504 return;
505
Jeff Layton0d424ad2010-09-20 16:01:35 -0700506 tcon = cifs_sb_master_tcon(cifs_sb);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500507
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530508 spin_lock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000509 if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) {
510 /* we have other mounts to same share or we have
511 already tried to force umount this and woken up
512 all waiting network requests, nothing to do */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530513 spin_unlock(&cifs_tcp_ses_lock);
Steve Frenchad8034f2009-06-26 03:25:49 +0000514 return;
515 } else if (tcon->tc_count == 1)
Steve French5e1253b2005-10-10 14:06:37 -0700516 tcon->tidStatus = CifsExiting;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530517 spin_unlock(&cifs_tcp_ses_lock);
Steve French5e1253b2005-10-10 14:06:37 -0700518
Steve French3a5ff612006-07-14 22:37:11 +0000519 /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
Steve French7b7abfe2005-11-09 15:21:09 -0800520 /* cancel_notify_requests(tcon); */
Steve French50c2f752007-07-13 00:33:32 +0000521 if (tcon->ses && tcon->ses->server) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500522 cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n");
Steve French9e2e85f2005-10-10 14:28:38 -0700523 wake_up_all(&tcon->ses->server->request_q);
Steve French6ab16d22005-11-29 20:55:11 -0800524 wake_up_all(&tcon->ses->server->response_q);
525 msleep(1); /* yield */
526 /* we have to kick the requests once more */
527 wake_up_all(&tcon->ses->server->response_q);
528 msleep(1);
Steve French5e1253b2005-10-10 14:06:37 -0700529 }
Steve French68058e72005-10-10 10:34:22 -0700530
531 return;
532}
Steve French68058e72005-10-10 10:34:22 -0700533
Steve Frenchbf97d282006-09-28 21:34:06 +0000534#ifdef CONFIG_CIFS_STATS2
Al Viro64132372011-12-08 20:51:13 -0500535static int cifs_show_stats(struct seq_file *s, struct dentry *root)
Steve Frenchbf97d282006-09-28 21:34:06 +0000536{
537 /* BB FIXME */
538 return 0;
539}
540#endif
541
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542static int cifs_remount(struct super_block *sb, int *flags, char *data)
543{
544 *flags |= MS_NODIRATIME;
545 return 0;
546}
547
Al Viro45321ac2010-06-07 13:43:19 -0400548static int cifs_drop_inode(struct inode *inode)
Jeff Layton12420ac2010-06-01 14:47:40 -0400549{
550 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
551
Al Viro45321ac2010-06-07 13:43:19 -0400552 /* no serverino => unconditional eviction */
553 return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) ||
554 generic_drop_inode(inode);
Jeff Layton12420ac2010-06-01 14:47:40 -0400555}
556
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800557static const struct super_operations cifs_super_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 .statfs = cifs_statfs,
559 .alloc_inode = cifs_alloc_inode,
560 .destroy_inode = cifs_destroy_inode,
Jeff Layton12420ac2010-06-01 14:47:40 -0400561 .drop_inode = cifs_drop_inode,
Al Virob57922d2010-06-07 14:34:48 -0400562 .evict_inode = cifs_evict_inode,
Jeff Layton12420ac2010-06-01 14:47:40 -0400563/* .delete_inode = cifs_delete_inode, */ /* Do not need above
564 function unless later we add lazy close of inodes or unless the
Steve French50c2f752007-07-13 00:33:32 +0000565 kernel forgets to call us with the same number of releases (closes)
566 as opens */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 .show_options = cifs_show_options,
Steve French7b7abfe2005-11-09 15:21:09 -0800568 .umount_begin = cifs_umount_begin,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 .remount_fs = cifs_remount,
Steve Frenchbf97d282006-09-28 21:34:06 +0000570#ifdef CONFIG_CIFS_STATS2
Steve Frenchf46d3e12006-09-30 01:08:55 +0000571 .show_stats = cifs_show_stats,
Steve Frenchbf97d282006-09-28 21:34:06 +0000572#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573};
574
Steve Frenchf87d39d2011-05-27 03:50:55 +0000575/*
576 * Get root dentry from superblock according to prefix path mount option.
577 * Return dentry with refcount + 1 on success and NULL otherwise.
578 */
579static struct dentry *
580cifs_get_root(struct smb_vol *vol, struct super_block *sb)
581{
Al Virofec11dd2011-07-18 13:50:40 -0400582 struct dentry *dentry;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000583 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Al Virofec11dd2011-07-18 13:50:40 -0400584 char *full_path = NULL;
585 char *s, *p;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000586 char sep;
587
Steve French6d3ea7e2012-11-28 22:34:41 -0600588 full_path = cifs_build_path_to_root(vol, cifs_sb,
589 cifs_sb_master_tcon(cifs_sb));
Steve Frenchf87d39d2011-05-27 03:50:55 +0000590 if (full_path == NULL)
Al Viro9403c9c2011-06-17 10:02:59 -0400591 return ERR_PTR(-ENOMEM);
Steve Frenchf87d39d2011-05-27 03:50:55 +0000592
Joe Perchesf96637b2013-05-04 22:12:25 -0500593 cifs_dbg(FYI, "Get root dentry for %s\n", full_path);
Steve Frenchf87d39d2011-05-27 03:50:55 +0000594
Steve Frenchf87d39d2011-05-27 03:50:55 +0000595 sep = CIFS_DIR_SEP(cifs_sb);
Al Virofec11dd2011-07-18 13:50:40 -0400596 dentry = dget(sb->s_root);
597 p = s = full_path;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000598
Al Virofec11dd2011-07-18 13:50:40 -0400599 do {
600 struct inode *dir = dentry->d_inode;
601 struct dentry *child;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000602
Pavel Shilovsky5b980b02011-08-21 19:30:15 +0400603 if (!dir) {
604 dput(dentry);
605 dentry = ERR_PTR(-ENOENT);
606 break;
607 }
Jeff Laytonce2ac522013-02-01 15:11:01 -0500608 if (!S_ISDIR(dir->i_mode)) {
609 dput(dentry);
610 dentry = ERR_PTR(-ENOTDIR);
611 break;
612 }
Pavel Shilovsky5b980b02011-08-21 19:30:15 +0400613
Al Virofec11dd2011-07-18 13:50:40 -0400614 /* skip separators */
615 while (*s == sep)
616 s++;
617 if (!*s)
618 break;
619 p = s++;
620 /* next separator */
621 while (*s && *s != sep)
622 s++;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000623
Al Virofec11dd2011-07-18 13:50:40 -0400624 mutex_lock(&dir->i_mutex);
625 child = lookup_one_len(p, dentry, s - p);
626 mutex_unlock(&dir->i_mutex);
627 dput(dentry);
628 dentry = child;
629 } while (!IS_ERR(dentry));
Steve Frenchf87d39d2011-05-27 03:50:55 +0000630 kfree(full_path);
Al Virofec11dd2011-07-18 13:50:40 -0400631 return dentry;
Steve Frenchf87d39d2011-05-27 03:50:55 +0000632}
633
Al Viroee01a142011-06-17 09:47:23 -0400634static int cifs_set_super(struct super_block *sb, void *data)
635{
636 struct cifs_mnt_data *mnt_data = data;
637 sb->s_fs_info = mnt_data->cifs_sb;
638 return set_anon_super(sb, NULL);
639}
640
Al Virod753ed92010-07-26 12:52:33 +0400641static struct dentry *
642cifs_do_mount(struct file_system_type *fs_type,
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000643 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644{
645 int rc;
Jan Blunckdb719222010-08-15 22:51:10 +0200646 struct super_block *sb;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000647 struct cifs_sb_info *cifs_sb;
648 struct smb_vol *volume_info;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400649 struct cifs_mnt_data mnt_data;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000650 struct dentry *root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651
Joe Perchesf96637b2013-05-04 22:12:25 -0500652 cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653
Jeff Layton04db79b2011-07-06 08:10:38 -0400654 volume_info = cifs_get_volume_info((char *)data, dev_name);
655 if (IS_ERR(volume_info))
656 return ERR_CAST(volume_info);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000657
658 cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
659 if (cifs_sb == NULL) {
660 root = ERR_PTR(-ENOMEM);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400661 goto out_nls;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000662 }
663
Al Viro5d3bc602011-06-17 09:17:28 -0400664 cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL);
665 if (cifs_sb->mountdata == NULL) {
666 root = ERR_PTR(-ENOMEM);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400667 goto out_cifs_sb;
Al Viro5d3bc602011-06-17 09:17:28 -0400668 }
669
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000670 cifs_setup_cifs_sb(volume_info, cifs_sb);
671
Al Viro97d11522011-06-17 09:29:57 -0400672 rc = cifs_mount(cifs_sb, volume_info);
673 if (rc) {
674 if (!(flags & MS_SILENT))
Joe Perchesf96637b2013-05-04 22:12:25 -0500675 cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n",
676 rc);
Al Viro97d11522011-06-17 09:29:57 -0400677 root = ERR_PTR(rc);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400678 goto out_mountdata;
Al Viro97d11522011-06-17 09:29:57 -0400679 }
680
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400681 mnt_data.vol = volume_info;
682 mnt_data.cifs_sb = cifs_sb;
683 mnt_data.flags = flags;
684
David Howells9249e172012-06-25 12:55:37 +0100685 /* BB should we make this contingent on mount parm? */
686 flags |= MS_NODIRATIME | MS_NOATIME;
687
688 sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000689 if (IS_ERR(sb)) {
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000690 root = ERR_CAST(sb);
Al Viro97d11522011-06-17 09:29:57 -0400691 cifs_umount(cifs_sb);
Al Virod757d712011-06-17 09:42:43 -0400692 goto out;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000693 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694
Al Viroee01a142011-06-17 09:47:23 -0400695 if (sb->s_root) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500696 cifs_dbg(FYI, "Use existing superblock\n");
Al Viro97d11522011-06-17 09:29:57 -0400697 cifs_umount(cifs_sb);
Al Viro5c4f1ad2011-06-17 09:56:55 -0400698 } else {
Al Viro5c4f1ad2011-06-17 09:56:55 -0400699 rc = cifs_read_super(sb);
700 if (rc) {
701 root = ERR_PTR(rc);
702 goto out_super;
703 }
704
705 sb->s_flags |= MS_ACTIVE;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400706 }
707
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400708 root = cifs_get_root(volume_info, sb);
Al Viro9403c9c2011-06-17 10:02:59 -0400709 if (IS_ERR(root))
Al Virofa18f1b2011-06-17 09:50:44 -0400710 goto out_super;
Al Virofa18f1b2011-06-17 09:50:44 -0400711
Joe Perchesf96637b2013-05-04 22:12:25 -0500712 cifs_dbg(FYI, "dentry root is: %p\n", root);
Pavel Shilovsky25c7f412011-05-26 23:35:47 +0400713 goto out;
714
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400715out_super:
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400716 deactivate_locked_super(sb);
Pavel Shilovsky641a58d2011-05-26 00:02:16 +0400717out:
Jeff Laytonf9e59bc2011-07-06 08:10:37 -0400718 cifs_cleanup_volume_info(volume_info);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +0000719 return root;
Al Viro5c4f1ad2011-06-17 09:56:55 -0400720
721out_mountdata:
722 kfree(cifs_sb->mountdata);
723out_cifs_sb:
724 kfree(cifs_sb);
725out_nls:
726 unload_nls(volume_info->local_nls);
727 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728}
729
Badari Pulavarty027445c2006-09-30 23:28:46 -0700730static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
731 unsigned long nr_segs, loff_t pos)
Steve French87c89dd2005-11-17 17:03:00 -0800732{
Al Viro496ad9a2013-01-23 17:07:38 -0500733 struct inode *inode = file_inode(iocb->ki_filp);
Steve French87c89dd2005-11-17 17:03:00 -0800734 ssize_t written;
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500735 int rc;
Steve French87c89dd2005-11-17 17:03:00 -0800736
Badari Pulavarty027445c2006-09-30 23:28:46 -0700737 written = generic_file_aio_write(iocb, iov, nr_segs, pos);
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500738
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400739 if (CIFS_CACHE_WRITE(CIFS_I(inode)))
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500740 return written;
741
742 rc = filemap_fdatawrite(inode->i_mapping);
743 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -0500744 cifs_dbg(FYI, "cifs_file_aio_write: %d rc on %p inode\n",
745 rc, inode);
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500746
Steve French87c89dd2005-11-17 17:03:00 -0800747 return written;
748}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749
Andrew Morton965c8e52012-12-17 15:59:39 -0800750static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
Steve Frenchc32a0b62006-01-12 14:41:28 -0800751{
Josef Bacik06222e42011-07-18 13:21:38 -0400752 /*
Andrew Morton965c8e52012-12-17 15:59:39 -0800753 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
Josef Bacik06222e42011-07-18 13:21:38 -0400754 * the cached file length
755 */
Andrew Morton965c8e52012-12-17 15:59:39 -0800756 if (whence != SEEK_SET && whence != SEEK_CUR) {
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400757 int rc;
Al Viro496ad9a2013-01-23 17:07:38 -0500758 struct inode *inode = file_inode(file);
Steve French030e9d82007-02-01 04:27:59 +0000759
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400760 /*
761 * We need to be sure that all dirty pages are written and the
762 * server has the newest file length.
763 */
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400764 if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400765 inode->i_mapping->nrpages != 0) {
766 rc = filemap_fdatawait(inode->i_mapping);
Steve French156ecb22011-05-20 17:00:01 +0000767 if (rc) {
768 mapping_set_error(inode->i_mapping, rc);
769 return rc;
770 }
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400771 }
772 /*
773 * Some applications poll for the file length in this strange
774 * way so we must seek to end on non-oplocked files by
775 * setting the revalidate time to zero.
776 */
777 CIFS_I(inode)->time = 0;
Steve French030e9d82007-02-01 04:27:59 +0000778
Pavel Shilovsky6feb9892011-04-07 18:18:11 +0400779 rc = cifs_revalidate_file_attr(file);
780 if (rc < 0)
781 return (loff_t)rc;
Steve Frenchc32a0b62006-01-12 14:41:28 -0800782 }
Andrew Morton965c8e52012-12-17 15:59:39 -0800783 return generic_file_llseek(file, offset, whence);
Steve Frenchc32a0b62006-01-12 14:41:28 -0800784}
785
Steve French84210e92008-10-23 04:42:37 +0000786static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
787{
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400788 /*
789 * Note that this is called by vfs setlease with i_lock held to
790 * protect *lease from going away.
791 */
Al Viro496ad9a2013-01-23 17:07:38 -0500792 struct inode *inode = file_inode(file);
Jeff Laytonba00ba62010-09-20 16:01:31 -0700793 struct cifsFileInfo *cfile = file->private_data;
Steve French84210e92008-10-23 04:42:37 +0000794
795 if (!(S_ISREG(inode->i_mode)))
796 return -EINVAL;
797
798 /* check if file is oplocked */
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400799 if (((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) ||
800 ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode))))
Steve French84210e92008-10-23 04:42:37 +0000801 return generic_setlease(file, arg, lease);
Jeff Layton13cfb732010-09-29 19:51:11 -0400802 else if (tlink_tcon(cfile->tlink)->local_lease &&
Pavel Shilovsky18cceb62013-09-05 13:01:06 +0400803 !CIFS_CACHE_READ(CIFS_I(inode)))
804 /*
805 * If the server claims to support oplock on this file, then we
806 * still need to check oplock even if the local_lease mount
807 * option is set, but there are servers which do not support
808 * oplock for which this mount option may be useful if the user
809 * knows that the file won't be changed on the server by anyone
810 * else.
811 */
Steve French84210e92008-10-23 04:42:37 +0000812 return generic_setlease(file, arg, lease);
Christoph Hellwig51ee4b82010-10-31 08:35:10 -0400813 else
Steve French84210e92008-10-23 04:42:37 +0000814 return -EAGAIN;
815}
Steve French84210e92008-10-23 04:42:37 +0000816
Igor Mammedove6ab1582008-01-11 01:49:48 +0000817struct file_system_type cifs_fs_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 .owner = THIS_MODULE,
819 .name = "cifs",
Al Virod753ed92010-07-26 12:52:33 +0400820 .mount = cifs_do_mount,
Al Viro6d686172011-06-17 08:34:57 -0400821 .kill_sb = cifs_kill_sb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 /* .fs_flags */
823};
Eric W. Biederman3e64fe52013-03-11 07:05:42 -0700824MODULE_ALIAS_FS("cifs");
Arjan van de Ven754661f2007-02-12 00:55:38 -0800825const struct inode_operations cifs_dir_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 .create = cifs_create,
Miklos Szeredid2c12712012-06-05 15:10:23 +0200827 .atomic_open = cifs_atomic_open,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 .lookup = cifs_lookup,
829 .getattr = cifs_getattr,
830 .unlink = cifs_unlink,
831 .link = cifs_hardlink,
832 .mkdir = cifs_mkdir,
833 .rmdir = cifs_rmdir,
834 .rename = cifs_rename,
835 .permission = cifs_permission,
836/* revalidate:cifs_revalidate, */
837 .setattr = cifs_setattr,
838 .symlink = cifs_symlink,
839 .mknod = cifs_mknod,
840#ifdef CONFIG_CIFS_XATTR
841 .setxattr = cifs_setxattr,
842 .getxattr = cifs_getxattr,
843 .listxattr = cifs_listxattr,
844 .removexattr = cifs_removexattr,
845#endif
846};
847
Arjan van de Ven754661f2007-02-12 00:55:38 -0800848const struct inode_operations cifs_file_inode_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849/* revalidate:cifs_revalidate, */
850 .setattr = cifs_setattr,
851 .getattr = cifs_getattr, /* do we need this anymore? */
852 .rename = cifs_rename,
853 .permission = cifs_permission,
854#ifdef CONFIG_CIFS_XATTR
855 .setxattr = cifs_setxattr,
856 .getxattr = cifs_getxattr,
857 .listxattr = cifs_listxattr,
858 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000859#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860};
861
Arjan van de Ven754661f2007-02-12 00:55:38 -0800862const struct inode_operations cifs_symlink_inode_ops = {
Steve French50c2f752007-07-13 00:33:32 +0000863 .readlink = generic_readlink,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 .follow_link = cifs_follow_link,
Al Viro87dc8002013-09-16 10:30:04 -0400865 .put_link = kfree_put_link,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 .permission = cifs_permission,
867 /* BB add the following two eventually */
868 /* revalidate: cifs_revalidate,
869 setattr: cifs_notify_change, *//* BB do we need notify change */
870#ifdef CONFIG_CIFS_XATTR
871 .setxattr = cifs_setxattr,
872 .getxattr = cifs_getxattr,
873 .listxattr = cifs_listxattr,
874 .removexattr = cifs_removexattr,
Steve French50c2f752007-07-13 00:33:32 +0000875#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876};
877
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800878const struct file_operations cifs_file_ops = {
Steve French87c89dd2005-11-17 17:03:00 -0800879 .read = do_sync_read,
880 .write = do_sync_write,
Steve French87c89dd2005-11-17 17:03:00 -0800881 .aio_read = generic_file_aio_read,
882 .aio_write = cifs_file_aio_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 .open = cifs_open,
884 .release = cifs_close,
885 .lock = cifs_lock,
886 .fsync = cifs_fsync,
887 .flush = cifs_flush,
888 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200889 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800890 .llseek = cifs_llseek,
Steve Frenchc67593a2005-04-28 22:41:04 -0700891#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000892 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700893#endif /* CONFIG_CIFS_POSIX */
Steve French84210e92008-10-23 04:42:37 +0000894 .setlease = cifs_setlease,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895};
896
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300897const struct file_operations cifs_file_strict_ops = {
898 .read = do_sync_read,
899 .write = do_sync_write,
Pavel Shilovskya70307e2010-12-14 11:50:41 +0300900 .aio_read = cifs_strict_readv,
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500901 .aio_write = cifs_strict_writev,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300902 .open = cifs_open,
903 .release = cifs_close,
904 .lock = cifs_lock,
905 .fsync = cifs_strict_fsync,
906 .flush = cifs_flush,
Pavel Shilovsky7a6a19b2010-12-14 11:29:51 +0300907 .mmap = cifs_file_strict_mmap,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300908 .splice_read = generic_file_splice_read,
909 .llseek = cifs_llseek,
910#ifdef CONFIG_CIFS_POSIX
911 .unlocked_ioctl = cifs_ioctl,
912#endif /* CONFIG_CIFS_POSIX */
913 .setlease = cifs_setlease,
914};
915
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800916const struct file_operations cifs_file_direct_ops = {
Pavel Shilovsky0b81c1c2011-03-10 10:11:05 +0300917 /* BB reevaluate whether they can be done with directio, no cache */
918 .read = do_sync_read,
919 .write = do_sync_write,
920 .aio_read = cifs_user_readv,
921 .aio_write = cifs_user_writev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 .open = cifs_open,
923 .release = cifs_close,
924 .lock = cifs_lock,
925 .fsync = cifs_fsync,
926 .flush = cifs_flush,
Steve Frencha994b8f2009-12-07 05:44:46 +0000927 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200928 .splice_read = generic_file_splice_read,
Steve Frenchc67593a2005-04-28 22:41:04 -0700929#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000930 .unlocked_ioctl = cifs_ioctl,
Steve Frenchc67593a2005-04-28 22:41:04 -0700931#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -0800932 .llseek = cifs_llseek,
Steve French84210e92008-10-23 04:42:37 +0000933 .setlease = cifs_setlease,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934};
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300935
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800936const struct file_operations cifs_file_nobrl_ops = {
Steve French87c89dd2005-11-17 17:03:00 -0800937 .read = do_sync_read,
938 .write = do_sync_write,
Steve French87c89dd2005-11-17 17:03:00 -0800939 .aio_read = generic_file_aio_read,
940 .aio_write = cifs_file_aio_write,
941 .open = cifs_open,
942 .release = cifs_close,
943 .fsync = cifs_fsync,
944 .flush = cifs_flush,
945 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200946 .splice_read = generic_file_splice_read,
Steve Frenchc32a0b62006-01-12 14:41:28 -0800947 .llseek = cifs_llseek,
Steve French8b94bcb2005-11-11 11:41:00 -0800948#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000949 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -0800950#endif /* CONFIG_CIFS_POSIX */
Steve French84210e92008-10-23 04:42:37 +0000951 .setlease = cifs_setlease,
Steve French8b94bcb2005-11-11 11:41:00 -0800952};
953
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300954const struct file_operations cifs_file_strict_nobrl_ops = {
955 .read = do_sync_read,
956 .write = do_sync_write,
Pavel Shilovskya70307e2010-12-14 11:50:41 +0300957 .aio_read = cifs_strict_readv,
Pavel Shilovsky72432ff2011-01-24 14:16:35 -0500958 .aio_write = cifs_strict_writev,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300959 .open = cifs_open,
960 .release = cifs_close,
961 .fsync = cifs_strict_fsync,
962 .flush = cifs_flush,
Pavel Shilovsky7a6a19b2010-12-14 11:29:51 +0300963 .mmap = cifs_file_strict_mmap,
Pavel Shilovsky8be7e6b2010-12-12 13:11:13 +0300964 .splice_read = generic_file_splice_read,
965 .llseek = cifs_llseek,
966#ifdef CONFIG_CIFS_POSIX
967 .unlocked_ioctl = cifs_ioctl,
968#endif /* CONFIG_CIFS_POSIX */
969 .setlease = cifs_setlease,
970};
971
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800972const struct file_operations cifs_file_direct_nobrl_ops = {
Pavel Shilovsky0b81c1c2011-03-10 10:11:05 +0300973 /* BB reevaluate whether they can be done with directio, no cache */
974 .read = do_sync_read,
975 .write = do_sync_write,
976 .aio_read = cifs_user_readv,
977 .aio_write = cifs_user_writev,
Steve French87c89dd2005-11-17 17:03:00 -0800978 .open = cifs_open,
979 .release = cifs_close,
980 .fsync = cifs_fsync,
981 .flush = cifs_flush,
Pavel Shilovsky810627a02010-03-27 02:00:49 +0000982 .mmap = cifs_file_mmap,
Jens Axboe5ffc4ef2007-06-01 11:49:19 +0200983 .splice_read = generic_file_splice_read,
Steve French8b94bcb2005-11-11 11:41:00 -0800984#ifdef CONFIG_CIFS_POSIX
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000985 .unlocked_ioctl = cifs_ioctl,
Steve French8b94bcb2005-11-11 11:41:00 -0800986#endif /* CONFIG_CIFS_POSIX */
Steve Frenchc32a0b62006-01-12 14:41:28 -0800987 .llseek = cifs_llseek,
Steve French84210e92008-10-23 04:42:37 +0000988 .setlease = cifs_setlease,
Steve French8b94bcb2005-11-11 11:41:00 -0800989};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800991const struct file_operations cifs_dir_ops = {
Al Virobe4ccdc2013-05-22 16:17:25 -0400992 .iterate = cifs_readdir,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 .release = cifs_closedir,
994 .read = generic_read_dir,
Steve Frenchf9ddcca2008-05-15 05:51:55 +0000995 .unlocked_ioctl = cifs_ioctl,
Christoph Hellwig3222a3e2008-09-03 21:53:01 +0200996 .llseek = generic_file_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997};
998
999static void
Alexey Dobriyan51cc5062008-07-25 19:45:34 -07001000cifs_init_once(void *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001{
1002 struct cifsInodeInfo *cifsi = inode;
1003
Christoph Lametera35afb82007-05-16 22:10:57 -07001004 inode_init_once(&cifsi->vfs_inode);
Pavel Shilovsky1b4b55a2012-09-19 06:22:44 -07001005 init_rwsem(&cifsi->lock_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006}
1007
1008static int
1009cifs_init_inodecache(void)
1010{
1011 cifs_inode_cachep = kmem_cache_create("cifs_inode_cache",
Steve French26f57362007-08-30 22:09:15 +00001012 sizeof(struct cifsInodeInfo),
Paul Jacksonfffb60f2006-03-24 03:16:06 -08001013 0, (SLAB_RECLAIM_ACCOUNT|
1014 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +09001015 cifs_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 if (cifs_inode_cachep == NULL)
1017 return -ENOMEM;
1018
1019 return 0;
1020}
1021
1022static void
1023cifs_destroy_inodecache(void)
1024{
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +10001025 /*
1026 * Make sure all delayed rcu free inodes are flushed before we
1027 * destroy cache.
1028 */
1029 rcu_barrier();
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001030 kmem_cache_destroy(cifs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031}
1032
1033static int
1034cifs_init_request_bufs(void)
1035{
Pavel Shilovsky3792c172012-01-12 22:40:50 +04001036 size_t max_hdr_size = MAX_CIFS_HDR_SIZE;
1037#ifdef CONFIG_CIFS_SMB2
1038 /*
1039 * SMB2 maximum header size is bigger than CIFS one - no problems to
1040 * allocate some more bytes for CIFS.
1041 */
1042 max_hdr_size = MAX_SMB2_HDR_SIZE;
1043#endif
Steve French4523cc32007-04-30 20:13:06 +00001044 if (CIFSMaxBufSize < 8192) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 /* Buffer size can not be smaller than 2 * PATH_MAX since maximum
1046 Unicode path name has to fit in any SMB/CIFS path based frames */
1047 CIFSMaxBufSize = 8192;
1048 } else if (CIFSMaxBufSize > 1024*127) {
1049 CIFSMaxBufSize = 1024 * 127;
1050 } else {
1051 CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/
1052 }
Joe Perchesf96637b2013-05-04 22:12:25 -05001053/*
1054 cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n",
1055 CIFSMaxBufSize, CIFSMaxBufSize);
1056*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 cifs_req_cachep = kmem_cache_create("cifs_request",
Pavel Shilovsky3792c172012-01-12 22:40:50 +04001058 CIFSMaxBufSize + max_hdr_size, 0,
Paul Mundt20c2df82007-07-20 10:11:58 +09001059 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 if (cifs_req_cachep == NULL)
1061 return -ENOMEM;
1062
Steve French4523cc32007-04-30 20:13:06 +00001063 if (cifs_min_rcv < 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 cifs_min_rcv = 1;
1065 else if (cifs_min_rcv > 64) {
1066 cifs_min_rcv = 64;
Joe Perchesf96637b2013-05-04 22:12:25 -05001067 cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 }
1069
Matthew Dobson93d23412006-03-26 01:37:50 -08001070 cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv,
1071 cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072
Steve French4523cc32007-04-30 20:13:06 +00001073 if (cifs_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 kmem_cache_destroy(cifs_req_cachep);
1075 return -ENOMEM;
1076 }
Steve Frenchec637e32005-12-12 20:53:18 -08001077 /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 almost all handle based requests (but not write response, nor is it
1079 sufficient for path based requests). A smaller size would have
Steve French50c2f752007-07-13 00:33:32 +00001080 been more efficient (compacting multiple slab items on one 4k page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 for the case in which debug was on, but this larger size allows
1082 more SMBs to use small buffer alloc and is still much more
Steve French6dc0f872007-07-06 23:13:06 +00001083 efficient to alloc 1 per page off the slab compared to 17K (5page)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 alloc of large cifs buffers even when page debugging is on */
1085 cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq",
Steve French6dc0f872007-07-06 23:13:06 +00001086 MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +09001087 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 if (cifs_sm_req_cachep == NULL) {
1089 mempool_destroy(cifs_req_poolp);
1090 kmem_cache_destroy(cifs_req_cachep);
Steve French6dc0f872007-07-06 23:13:06 +00001091 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 }
1093
Steve French4523cc32007-04-30 20:13:06 +00001094 if (cifs_min_small < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 cifs_min_small = 2;
1096 else if (cifs_min_small > 256) {
1097 cifs_min_small = 256;
Joe Perchesf96637b2013-05-04 22:12:25 -05001098 cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 }
1100
Matthew Dobson93d23412006-03-26 01:37:50 -08001101 cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small,
1102 cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103
Steve French4523cc32007-04-30 20:13:06 +00001104 if (cifs_sm_req_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 mempool_destroy(cifs_req_poolp);
1106 kmem_cache_destroy(cifs_req_cachep);
1107 kmem_cache_destroy(cifs_sm_req_cachep);
1108 return -ENOMEM;
1109 }
1110
1111 return 0;
1112}
1113
1114static void
1115cifs_destroy_request_bufs(void)
1116{
1117 mempool_destroy(cifs_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001118 kmem_cache_destroy(cifs_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 mempool_destroy(cifs_sm_req_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001120 kmem_cache_destroy(cifs_sm_req_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121}
1122
1123static int
1124cifs_init_mids(void)
1125{
1126 cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids",
Steve French26f57362007-08-30 22:09:15 +00001127 sizeof(struct mid_q_entry), 0,
1128 SLAB_HWCACHE_ALIGN, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 if (cifs_mid_cachep == NULL)
1130 return -ENOMEM;
1131
Matthew Dobson93d23412006-03-26 01:37:50 -08001132 /* 3 is a reasonable minimum number of simultaneous operations */
1133 cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep);
Steve French4523cc32007-04-30 20:13:06 +00001134 if (cifs_mid_poolp == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 kmem_cache_destroy(cifs_mid_cachep);
1136 return -ENOMEM;
1137 }
1138
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 return 0;
1140}
1141
1142static void
1143cifs_destroy_mids(void)
1144{
1145 mempool_destroy(cifs_mid_poolp);
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001146 kmem_cache_destroy(cifs_mid_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147}
1148
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149static int __init
1150init_cifs(void)
1151{
1152 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 cifs_proc_init();
Jeff Laytone7ddee92008-11-14 13:44:38 -05001154 INIT_LIST_HEAD(&cifs_tcp_ses_list);
Steve French0eff0e22011-02-24 05:39:23 +00001155#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
Steve French4ca9c192005-10-10 19:52:13 -07001156 INIT_LIST_HEAD(&GlobalDnotifyReqList);
1157 INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
Steve French0eff0e22011-02-24 05:39:23 +00001158#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159/*
1160 * Initialize Global counters
1161 */
1162 atomic_set(&sesInfoAllocCount, 0);
1163 atomic_set(&tconInfoAllocCount, 0);
Steve French6dc0f872007-07-06 23:13:06 +00001164 atomic_set(&tcpSesAllocCount, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 atomic_set(&tcpSesReconnectCount, 0);
1166 atomic_set(&tconInfoReconnectCount, 0);
1167
1168 atomic_set(&bufAllocCount, 0);
Steve French4498eed52005-12-03 13:58:57 -08001169 atomic_set(&smBufAllocCount, 0);
1170#ifdef CONFIG_CIFS_STATS2
1171 atomic_set(&totBufAllocCount, 0);
1172 atomic_set(&totSmBufAllocCount, 0);
1173#endif /* CONFIG_CIFS_STATS2 */
1174
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 atomic_set(&midCount, 0);
1176 GlobalCurrentXid = 0;
1177 GlobalTotalActiveXid = 0;
1178 GlobalMaxActiveXid = 0;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05301179 spin_lock_init(&cifs_tcp_ses_lock);
Jeff Layton44772882010-10-15 15:34:03 -04001180 spin_lock_init(&cifs_file_list_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 spin_lock_init(&GlobalMid_Lock);
1182
Pavel Shilovskyb8c32db2012-09-19 06:22:44 -07001183#ifdef CONFIG_CIFS_SMB2
1184 get_random_bytes(cifs_client_guid, SMB2_CLIENT_GUID_SIZE);
1185#endif
1186
Steve French4523cc32007-04-30 20:13:06 +00001187 if (cifs_max_pending < 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 cifs_max_pending = 2;
Joe Perchesf96637b2013-05-04 22:12:25 -05001189 cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
Pavel Shilovsky10b9b982012-03-20 12:55:09 +03001190 } else if (cifs_max_pending > CIFS_MAX_REQ) {
1191 cifs_max_pending = CIFS_MAX_REQ;
Joe Perchesf96637b2013-05-04 22:12:25 -05001192 cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
1193 CIFS_MAX_REQ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 }
1195
Jeff Laytonda472fc2012-03-23 14:40:53 -04001196 cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
1197 if (!cifsiod_wq) {
1198 rc = -ENOMEM;
1199 goto out_clean_proc;
1200 }
1201
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301202 rc = cifs_fscache_register();
1203 if (rc)
Jeff Laytonda472fc2012-03-23 14:40:53 -04001204 goto out_destroy_wq;
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301205
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206 rc = cifs_init_inodecache();
Steve French45af7a02006-04-21 22:52:25 +00001207 if (rc)
Steve Frenchd3bf5222010-09-22 19:15:36 +00001208 goto out_unreg_fscache;
Steve French45af7a02006-04-21 22:52:25 +00001209
1210 rc = cifs_init_mids();
1211 if (rc)
1212 goto out_destroy_inodecache;
1213
1214 rc = cifs_init_request_bufs();
1215 if (rc)
1216 goto out_destroy_mids;
1217
Jeff Layton84a15b92007-11-03 05:02:24 +00001218#ifdef CONFIG_CIFS_UPCALL
1219 rc = register_key_type(&cifs_spnego_key_type);
1220 if (rc)
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001221 goto out_destroy_request_bufs;
1222#endif /* CONFIG_CIFS_UPCALL */
1223
1224#ifdef CONFIG_CIFS_ACL
1225 rc = init_cifs_idmap();
1226 if (rc)
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001227 goto out_register_key_type;
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001228#endif /* CONFIG_CIFS_ACL */
1229
1230 rc = register_filesystem(&cifs_fs_type);
1231 if (rc)
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001232 goto out_init_cifs_idmap;
Steve French45af7a02006-04-21 22:52:25 +00001233
Steve French45af7a02006-04-21 22:52:25 +00001234 return 0;
1235
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001236out_init_cifs_idmap:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001237#ifdef CONFIG_CIFS_ACL
1238 exit_cifs_idmap();
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001239out_register_key_type:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001240#endif
1241#ifdef CONFIG_CIFS_UPCALL
1242 unregister_key_type(&cifs_spnego_key_type);
Shirish Pargaonkarc4aca0c2011-05-06 02:35:00 -05001243out_destroy_request_bufs:
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001244#endif
Steve French45af7a02006-04-21 22:52:25 +00001245 cifs_destroy_request_bufs();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001246out_destroy_mids:
Steve French45af7a02006-04-21 22:52:25 +00001247 cifs_destroy_mids();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001248out_destroy_inodecache:
Steve French45af7a02006-04-21 22:52:25 +00001249 cifs_destroy_inodecache();
Steve Frenchd3bf5222010-09-22 19:15:36 +00001250out_unreg_fscache:
Suresh Jayaramanf579cf32010-07-05 18:11:50 +05301251 cifs_fscache_unregister();
Jeff Laytonda472fc2012-03-23 14:40:53 -04001252out_destroy_wq:
1253 destroy_workqueue(cifsiod_wq);
Steve Frenchd3bf5222010-09-22 19:15:36 +00001254out_clean_proc:
1255 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 return rc;
1257}
1258
1259static void __exit
1260exit_cifs(void)
1261{
Joe Perchesf96637b2013-05-04 22:12:25 -05001262 cifs_dbg(NOISY, "exit_cifs\n");
Jeff Layton3dd93302012-03-21 06:27:55 -04001263 unregister_filesystem(&cifs_fs_type);
Igor Mammedov78d31a32008-04-24 12:56:07 +04001264 cifs_dfs_release_automount_timer();
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001265#ifdef CONFIG_CIFS_ACL
Shirish Pargaonkar4d79dba2011-04-27 23:34:35 -05001266 exit_cifs_idmap();
1267#endif
Jeff Layton84a15b92007-11-03 05:02:24 +00001268#ifdef CONFIG_CIFS_UPCALL
1269 unregister_key_type(&cifs_spnego_key_type);
1270#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 cifs_destroy_request_bufs();
Jeff Layton3dd93302012-03-21 06:27:55 -04001272 cifs_destroy_mids();
1273 cifs_destroy_inodecache();
1274 cifs_fscache_unregister();
Jeff Laytonda472fc2012-03-23 14:40:53 -04001275 destroy_workqueue(cifsiod_wq);
Jeff Layton3dd93302012-03-21 06:27:55 -04001276 cifs_proc_clean();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277}
1278
1279MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>");
Steve French6dc0f872007-07-06 23:13:06 +00001280MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281MODULE_DESCRIPTION
Steve French63135e02007-07-17 17:34:02 +00001282 ("VFS to access servers complying with the SNIA CIFS Specification "
1283 "e.g. Samba and Windows");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284MODULE_VERSION(CIFS_VERSION);
1285module_init(init_cifs)
1286module_exit(exit_cifs)