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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C) International Business Machines Corp., 2000-2004
3 * Portions Copyright (C) Christoph Hellwig, 2001-2002
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
Dave Kleikamp63f83c92006-10-02 09:55:27 -05007 * the Free Software Foundation; either version 2 of the License, or
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * (at your option) any later version.
Dave Kleikamp63f83c92006-10-02 09:55:27 -05009 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
Dave Kleikamp63f83c92006-10-02 09:55:27 -050016 * along with this program; if not, write to the Free Software
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/module.h>
22#include <linux/parser.h>
23#include <linux/completion.h>
24#include <linux/vfs.h>
Jan Kara74abb982008-07-25 01:46:51 -070025#include <linux/quotaops.h>
Mark Bellon8fc27512005-09-06 15:16:54 -070026#include <linux/mount.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/moduleparam.h>
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -060028#include <linux/kthread.h>
Christoph Hellwig9a59f452005-06-23 00:10:19 -070029#include <linux/posix_acl.h>
Dave Kleikamp115ff502006-07-26 14:52:13 -050030#include <linux/buffer_head.h>
Christoph Hellwiga5694252007-07-17 04:04:28 -070031#include <linux/exportfs.h>
Coly Lib5c816a2009-01-21 00:05:39 +080032#include <linux/crc32.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090033#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <asm/uaccess.h>
Mark Bellon8fc27512005-09-06 15:16:54 -070035#include <linux/seq_file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
37#include "jfs_incore.h"
38#include "jfs_filsys.h"
Dave Kleikamp1868f4a2005-05-04 15:29:35 -050039#include "jfs_inode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include "jfs_metapage.h"
41#include "jfs_superblock.h"
42#include "jfs_dmap.h"
43#include "jfs_imap.h"
44#include "jfs_acl.h"
45#include "jfs_debug.h"
46
47MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
48MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
49MODULE_LICENSE("GPL");
50
Christoph Lametere18b8902006-12-06 20:33:20 -080051static struct kmem_cache * jfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -080053static const struct super_operations jfs_super_operations;
Christoph Hellwig39655162007-10-21 16:42:17 -070054static const struct export_operations jfs_export_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055static struct file_system_type jfs_fs_type;
56
57#define MAX_COMMIT_THREADS 64
58static int commit_threads = 0;
59module_param(commit_threads, int, 0);
60MODULE_PARM_DESC(commit_threads, "Number of commit threads");
61
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -060062static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS];
63struct task_struct *jfsIOthread;
64struct task_struct *jfsSyncThread;
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
66#ifdef CONFIG_JFS_DEBUG
67int jfsloglevel = JFS_LOGLEVEL_WARN;
68module_param(jfsloglevel, int, 0644);
69MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
70#endif
71
Linus Torvalds1da177e2005-04-16 15:20:36 -070072static void jfs_handle_error(struct super_block *sb)
73{
74 struct jfs_sb_info *sbi = JFS_SBI(sb);
75
76 if (sb->s_flags & MS_RDONLY)
77 return;
78
79 updateSuper(sb, FM_DIRTY);
80
81 if (sbi->flag & JFS_ERR_PANIC)
82 panic("JFS (device %s): panic forced after error\n",
83 sb->s_id);
84 else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
85 jfs_err("ERROR: (device %s): remounting filesystem "
86 "as read-only\n",
87 sb->s_id);
88 sb->s_flags |= MS_RDONLY;
Dave Kleikamp63f83c92006-10-02 09:55:27 -050089 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91 /* nothing is done for continue beyond marking the superblock dirty */
92}
93
94void jfs_error(struct super_block *sb, const char * function, ...)
95{
96 static char error_buf[256];
97 va_list args;
98
99 va_start(args, function);
Alexey Dobriyan4a6e6172006-12-06 20:37:04 -0800100 vsnprintf(error_buf, sizeof(error_buf), function, args);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 va_end(args);
102
103 printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf);
104
105 jfs_handle_error(sb);
106}
107
108static struct inode *jfs_alloc_inode(struct super_block *sb)
109{
110 struct jfs_inode_info *jfs_inode;
111
112 jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
113 if (!jfs_inode)
114 return NULL;
115 return &jfs_inode->vfs_inode;
116}
117
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100118static void jfs_i_callback(struct rcu_head *head)
119{
120 struct inode *inode = container_of(head, struct inode, i_rcu);
121 struct jfs_inode_info *ji = JFS_IP(inode);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100122 kmem_cache_free(jfs_inode_cachep, ji);
123}
124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125static void jfs_destroy_inode(struct inode *inode)
126{
127 struct jfs_inode_info *ji = JFS_IP(inode);
128
Dave Kleikamp8a9cd6d2005-08-10 11:14:39 -0500129 BUG_ON(!list_empty(&ji->anon_inode_list));
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 spin_lock_irq(&ji->ag_lock);
132 if (ji->active_ag != -1) {
133 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
134 atomic_dec(&bmap->db_active[ji->active_ag]);
135 ji->active_ag = -1;
136 }
137 spin_unlock_irq(&ji->ag_lock);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +1100138 call_rcu(&inode->i_rcu, jfs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139}
140
David Howells726c3342006-06-23 02:02:58 -0700141static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142{
David Howells726c3342006-06-23 02:02:58 -0700143 struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 s64 maxinodes;
145 struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
146
147 jfs_info("In jfs_statfs");
148 buf->f_type = JFS_SUPER_MAGIC;
149 buf->f_bsize = sbi->bsize;
150 buf->f_blocks = sbi->bmap->db_mapsize;
151 buf->f_bfree = sbi->bmap->db_nfree;
152 buf->f_bavail = sbi->bmap->db_nfree;
153 /*
154 * If we really return the number of allocated & free inodes, some
155 * applications will fail because they won't see enough free inodes.
156 * We'll try to calculate some guess as to how may inodes we can
157 * really allocate
158 *
159 * buf->f_files = atomic_read(&imap->im_numinos);
160 * buf->f_ffree = atomic_read(&imap->im_numfree);
161 */
162 maxinodes = min((s64) atomic_read(&imap->im_numinos) +
163 ((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
164 << L2INOSPEREXT), (s64) 0xffffffffLL);
165 buf->f_files = maxinodes;
166 buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
167 atomic_read(&imap->im_numfree));
Coly Lib5c816a2009-01-21 00:05:39 +0800168 buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2);
169 buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2,
170 sizeof(sbi->uuid)/2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
172 buf->f_namelen = JFS_NAME_MAX;
173 return 0;
174}
175
176static void jfs_put_super(struct super_block *sb)
177{
178 struct jfs_sb_info *sbi = JFS_SBI(sb);
179 int rc;
180
181 jfs_info("In jfs_put_super");
Christoph Hellwig6cfd0142009-05-05 15:40:36 +0200182
Christoph Hellwige0ccfd92010-05-19 07:16:42 -0400183 dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 rc = jfs_umount(sb);
186 if (rc)
187 jfs_err("jfs_umount failed with return code %d", rc);
Thomas Gleixner6d729e42009-08-16 21:05:08 +0000188
189 unload_nls(sbi->nls_tab);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600191 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
192 iput(sbi->direct_inode);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600193
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 kfree(sbi);
195}
196
197enum {
198 Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
Mark Bellon8fc27512005-09-06 15:16:54 -0700199 Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600200 Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201};
202
Steven Whitehousea447c092008-10-13 10:46:57 +0100203static const match_table_t tokens = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 {Opt_integrity, "integrity"},
205 {Opt_nointegrity, "nointegrity"},
206 {Opt_iocharset, "iocharset=%s"},
207 {Opt_resize, "resize=%u"},
208 {Opt_resize_nosize, "resize"},
209 {Opt_errors, "errors=%s"},
210 {Opt_ignore, "noquota"},
211 {Opt_ignore, "quota"},
Mark Bellon8fc27512005-09-06 15:16:54 -0700212 {Opt_usrquota, "usrquota"},
213 {Opt_grpquota, "grpquota"},
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600214 {Opt_uid, "uid=%u"},
215 {Opt_gid, "gid=%u"},
216 {Opt_umask, "umask=%u"},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 {Opt_err, NULL}
218};
219
220static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
221 int *flag)
222{
223 void *nls_map = (void *)-1; /* -1: no change; NULL: none */
224 char *p;
225 struct jfs_sb_info *sbi = JFS_SBI(sb);
226
227 *newLVSize = 0;
228
229 if (!options)
230 return 1;
231
232 while ((p = strsep(&options, ",")) != NULL) {
233 substring_t args[MAX_OPT_ARGS];
234 int token;
235 if (!*p)
236 continue;
237
238 token = match_token(p, tokens, args);
239 switch (token) {
240 case Opt_integrity:
241 *flag &= ~JFS_NOINTEGRITY;
242 break;
243 case Opt_nointegrity:
244 *flag |= JFS_NOINTEGRITY;
245 break;
246 case Opt_ignore:
247 /* Silently ignore the quota options */
248 /* Don't do anything ;-) */
249 break;
250 case Opt_iocharset:
251 if (nls_map && nls_map != (void *) -1)
252 unload_nls(nls_map);
253 if (!strcmp(args[0].from, "none"))
254 nls_map = NULL;
255 else {
256 nls_map = load_nls(args[0].from);
257 if (!nls_map) {
258 printk(KERN_ERR
259 "JFS: charset not found\n");
260 goto cleanup;
261 }
262 }
263 break;
264 case Opt_resize:
265 {
266 char *resize = args[0].from;
267 *newLVSize = simple_strtoull(resize, &resize, 0);
268 break;
269 }
270 case Opt_resize_nosize:
271 {
272 *newLVSize = sb->s_bdev->bd_inode->i_size >>
273 sb->s_blocksize_bits;
274 if (*newLVSize == 0)
275 printk(KERN_ERR
276 "JFS: Cannot determine volume size\n");
277 break;
278 }
279 case Opt_errors:
280 {
281 char *errors = args[0].from;
282 if (!errors || !*errors)
283 goto cleanup;
284 if (!strcmp(errors, "continue")) {
285 *flag &= ~JFS_ERR_REMOUNT_RO;
286 *flag &= ~JFS_ERR_PANIC;
287 *flag |= JFS_ERR_CONTINUE;
288 } else if (!strcmp(errors, "remount-ro")) {
289 *flag &= ~JFS_ERR_CONTINUE;
290 *flag &= ~JFS_ERR_PANIC;
291 *flag |= JFS_ERR_REMOUNT_RO;
292 } else if (!strcmp(errors, "panic")) {
293 *flag &= ~JFS_ERR_CONTINUE;
294 *flag &= ~JFS_ERR_REMOUNT_RO;
295 *flag |= JFS_ERR_PANIC;
296 } else {
297 printk(KERN_ERR
298 "JFS: %s is an invalid error handler\n",
299 errors);
300 goto cleanup;
301 }
302 break;
303 }
Mark Bellon8fc27512005-09-06 15:16:54 -0700304
Dave Kleikamp115ff502006-07-26 14:52:13 -0500305#ifdef CONFIG_QUOTA
Mark Bellon8fc27512005-09-06 15:16:54 -0700306 case Opt_quota:
307 case Opt_usrquota:
308 *flag |= JFS_USRQUOTA;
309 break;
310 case Opt_grpquota:
311 *flag |= JFS_GRPQUOTA;
312 break;
313#else
314 case Opt_usrquota:
315 case Opt_grpquota:
316 case Opt_quota:
317 printk(KERN_ERR
318 "JFS: quota operations not supported\n");
319 break;
320#endif
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600321 case Opt_uid:
322 {
323 char *uid = args[0].from;
324 sbi->uid = simple_strtoul(uid, &uid, 0);
325 break;
326 }
327 case Opt_gid:
328 {
329 char *gid = args[0].from;
330 sbi->gid = simple_strtoul(gid, &gid, 0);
331 break;
332 }
333 case Opt_umask:
334 {
335 char *umask = args[0].from;
336 sbi->umask = simple_strtoul(umask, &umask, 8);
337 if (sbi->umask & ~0777) {
338 printk(KERN_ERR
339 "JFS: Invalid value of umask\n");
340 goto cleanup;
341 }
342 break;
343 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 default:
345 printk("jfs: Unrecognized mount option \"%s\" "
346 " or missing value\n", p);
347 goto cleanup;
348 }
349 }
350
351 if (nls_map != (void *) -1) {
352 /* Discard old (if remount) */
Thomas Gleixner6d729e42009-08-16 21:05:08 +0000353 unload_nls(sbi->nls_tab);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 sbi->nls_tab = nls_map;
355 }
356 return 1;
357
358cleanup:
359 if (nls_map && nls_map != (void *) -1)
360 unload_nls(nls_map);
361 return 0;
362}
363
364static int jfs_remount(struct super_block *sb, int *flags, char *data)
365{
366 s64 newLVSize = 0;
367 int rc = 0;
368 int flag = JFS_SBI(sb)->flag;
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200369 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
371 if (!parse_options(data, sb, &newLVSize, &flag)) {
372 return -EINVAL;
373 }
Jan Blunck22b26db2010-02-24 13:25:31 +0100374
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 if (newLVSize) {
376 if (sb->s_flags & MS_RDONLY) {
377 printk(KERN_ERR
378 "JFS: resize requires volume to be mounted read-write\n");
379 return -EROFS;
380 }
381 rc = jfs_extendfs(sb, newLVSize, 0);
Jan Blunck22b26db2010-02-24 13:25:31 +0100382 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 return rc;
384 }
385
386 if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600387 /*
388 * Invalidate any previously read metadata. fsck may have
389 * changed the on-disk data since we mounted r/o
390 */
391 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 JFS_SBI(sb)->flag = flag;
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200394 ret = jfs_mount_rw(sb, 1);
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400395
396 /* mark the fs r/w for quota activity */
397 sb->s_flags &= ~MS_RDONLY;
398
Christoph Hellwig0f0dd622010-05-19 07:16:41 -0400399 dquot_resume(sb, -1);
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200400 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 }
402 if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
Christoph Hellwig0f0dd622010-05-19 07:16:41 -0400403 rc = dquot_suspend(sb, -1);
404 if (rc < 0) {
Christoph Hellwig0f0dd622010-05-19 07:16:41 -0400405 return rc;
Christoph Hellwigc79d9672010-05-19 07:16:40 -0400406 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 rc = jfs_umount_rw(sb);
408 JFS_SBI(sb)->flag = flag;
409 return rc;
410 }
411 if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
412 if (!(sb->s_flags & MS_RDONLY)) {
413 rc = jfs_umount_rw(sb);
Jan Blunck22b26db2010-02-24 13:25:31 +0100414 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 return rc;
Jan Blunck22b26db2010-02-24 13:25:31 +0100416
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 JFS_SBI(sb)->flag = flag;
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200418 ret = jfs_mount_rw(sb, 1);
Alessio Igor Bogani337eb002009-05-12 15:10:54 +0200419 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 }
421 JFS_SBI(sb)->flag = flag;
422
423 return 0;
424}
425
426static int jfs_fill_super(struct super_block *sb, void *data, int silent)
427{
428 struct jfs_sb_info *sbi;
429 struct inode *inode;
430 int rc;
431 s64 newLVSize = 0;
David Howellseab1df72008-02-07 00:15:43 -0800432 int flag, ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
434 jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
435
Jan Blunck22b26db2010-02-24 13:25:31 +0100436 if (!new_valid_dev(sb->s_bdev->bd_dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 return -EOVERFLOW;
438
Eric Sesterhenn5b3030e2006-02-23 09:47:13 -0600439 sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
Jan Blunck22b26db2010-02-24 13:25:31 +0100440 if (!sbi)
Akinobu Mita087387f2006-09-14 09:22:38 -0500441 return -ENOMEM;
Jan Blunck22b26db2010-02-24 13:25:31 +0100442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 sb->s_fs_info = sbi;
Al Viro8de52772012-02-06 12:45:27 -0500444 sb->s_max_links = JFS_LINK_MAX;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 sbi->sb = sb;
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600446 sbi->uid = sbi->gid = sbi->umask = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
448 /* initialize the mount flag and determine the default error handler */
449 flag = JFS_ERR_REMOUNT_RO;
450
Jan Blunck684bdc72010-04-12 16:44:08 -0700451 if (!parse_options((char *) data, sb, &newLVSize, &flag))
452 goto out_kfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 sbi->flag = flag;
454
455#ifdef CONFIG_JFS_POSIX_ACL
456 sb->s_flags |= MS_POSIXACL;
457#endif
458
459 if (newLVSize) {
460 printk(KERN_ERR "resize option for remount only\n");
Jan Blunck684bdc72010-04-12 16:44:08 -0700461 goto out_kfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 }
463
464 /*
465 * Initialize blocksize to 4K.
466 */
467 sb_set_blocksize(sb, PSIZE);
468
469 /*
470 * Set method vectors.
471 */
472 sb->s_op = &jfs_super_operations;
473 sb->s_export_op = &jfs_export_operations;
Christoph Hellwig123e9ca2010-05-19 07:16:44 -0400474#ifdef CONFIG_QUOTA
475 sb->dq_op = &dquot_operations;
Christoph Hellwig287a8092010-05-19 07:16:45 -0400476 sb->s_qcop = &dquot_quotactl_ops;
Christoph Hellwig123e9ca2010-05-19 07:16:44 -0400477#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600479 /*
480 * Initialize direct-mapping inode/address-space
481 */
482 inode = new_inode(sb);
David Howellseab1df72008-02-07 00:15:43 -0800483 if (inode == NULL) {
484 ret = -ENOMEM;
Jan Blunck684bdc72010-04-12 16:44:08 -0700485 goto out_unload;
David Howellseab1df72008-02-07 00:15:43 -0800486 }
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600487 inode->i_ino = 0;
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600488 inode->i_size = sb->s_bdev->bd_inode->i_size;
489 inode->i_mapping->a_ops = &jfs_metapage_aops;
Dave Kleikampac17b8b2005-10-03 15:32:11 -0500490 insert_inode_hash(inode);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600491 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
492
493 sbi->direct_inode = inode;
494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 rc = jfs_mount(sb);
496 if (rc) {
497 if (!silent) {
498 jfs_err("jfs_mount failed w/return code = %d", rc);
499 }
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600500 goto out_mount_failed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 }
502 if (sb->s_flags & MS_RDONLY)
503 sbi->log = NULL;
504 else {
505 rc = jfs_mount_rw(sb, 0);
506 if (rc) {
507 if (!silent) {
508 jfs_err("jfs_mount_rw failed, return code = %d",
509 rc);
510 }
511 goto out_no_rw;
512 }
513 }
514
515 sb->s_magic = JFS_SUPER_MAGIC;
516
Al Viro94b77bd2010-12-18 10:59:31 -0500517 if (sbi->mntflag & JFS_OS2)
518 sb->s_d_op = &jfs_ci_dentry_operations;
519
David Howellseab1df72008-02-07 00:15:43 -0800520 inode = jfs_iget(sb, ROOT_I);
521 if (IS_ERR(inode)) {
522 ret = PTR_ERR(inode);
Dave Kleikamp6536d282008-05-21 10:45:16 -0500523 goto out_no_rw;
David Howellseab1df72008-02-07 00:15:43 -0800524 }
Al Viro48fde702012-01-08 22:15:13 -0500525 sb->s_root = d_make_root(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 if (!sb->s_root)
527 goto out_no_root;
528
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 /* logical blocks are represented by 40 bits in pxd_t, etc. */
530 sb->s_maxbytes = ((u64) sb->s_blocksize) << 40;
531#if BITS_PER_LONG == 32
532 /*
533 * Page cache is indexed by long.
534 * I would use MAX_LFS_FILESIZE, but it's only half as big
535 */
Alan Cox28ba0ec2009-11-06 11:31:06 +0000536 sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, (u64)sb->s_maxbytes);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537#endif
538 sb->s_time_gran = 1;
539 return 0;
540
541out_no_root:
Dave Kleikamp6536d282008-05-21 10:45:16 -0500542 jfs_err("jfs_read_super: get root dentry failed");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
544out_no_rw:
545 rc = jfs_umount(sb);
546 if (rc) {
547 jfs_err("jfs_umount failed with return code %d", rc);
548 }
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600549out_mount_failed:
OGAWA Hirofumi28fd1292006-01-08 01:02:14 -0800550 filemap_write_and_wait(sbi->direct_inode->i_mapping);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600551 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
552 make_bad_inode(sbi->direct_inode);
553 iput(sbi->direct_inode);
554 sbi->direct_inode = NULL;
Jan Blunck684bdc72010-04-12 16:44:08 -0700555out_unload:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 if (sbi->nls_tab)
557 unload_nls(sbi->nls_tab);
Jan Blunck684bdc72010-04-12 16:44:08 -0700558out_kfree:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 kfree(sbi);
David Howellseab1df72008-02-07 00:15:43 -0800560 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561}
562
Takashi Satoc4be0c12009-01-09 16:40:58 -0800563static int jfs_freeze(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564{
565 struct jfs_sb_info *sbi = JFS_SBI(sb);
566 struct jfs_log *log = sbi->log;
567
568 if (!(sb->s_flags & MS_RDONLY)) {
569 txQuiesce(sb);
570 lmLogShutdown(log);
571 updateSuper(sb, FM_CLEAN);
572 }
Takashi Satoc4be0c12009-01-09 16:40:58 -0800573 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574}
575
Takashi Satoc4be0c12009-01-09 16:40:58 -0800576static int jfs_unfreeze(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577{
578 struct jfs_sb_info *sbi = JFS_SBI(sb);
579 struct jfs_log *log = sbi->log;
580 int rc = 0;
581
582 if (!(sb->s_flags & MS_RDONLY)) {
583 updateSuper(sb, FM_MOUNT);
584 if ((rc = lmLogInit(log)))
585 jfs_err("jfs_unlock failed with return code %d", rc);
586 else
587 txResume(sb);
588 }
Takashi Satoc4be0c12009-01-09 16:40:58 -0800589 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590}
591
Al Viro152a0832010-07-25 00:46:55 +0400592static struct dentry *jfs_do_mount(struct file_system_type *fs_type,
593 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594{
Al Viro152a0832010-07-25 00:46:55 +0400595 return mount_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596}
597
598static int jfs_sync_fs(struct super_block *sb, int wait)
599{
600 struct jfs_log *log = JFS_SBI(sb)->log;
601
602 /* log == NULL indicates read-only mount */
Dave Kleikamp1c627822005-05-02 12:25:08 -0600603 if (log) {
Jan Karaa1177822012-07-03 16:45:29 +0200604 /*
605 * Write quota structures to quota file, sync_blockdev() will
606 * write them to disk later
607 */
608 dquot_writeback_dquots(sb, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 jfs_flush_journal(log, wait);
Dave Kleikampcbc3d652005-07-27 09:17:57 -0500610 jfs_syncpt(log, 0);
Dave Kleikamp1c627822005-05-02 12:25:08 -0600611 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
613 return 0;
614}
615
Al Viro34c80b12011-12-08 21:32:45 -0500616static int jfs_show_options(struct seq_file *seq, struct dentry *root)
Mark Bellon8fc27512005-09-06 15:16:54 -0700617{
Al Viro34c80b12011-12-08 21:32:45 -0500618 struct jfs_sb_info *sbi = JFS_SBI(root->d_sb);
Mark Bellon8fc27512005-09-06 15:16:54 -0700619
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600620 if (sbi->uid != -1)
621 seq_printf(seq, ",uid=%d", sbi->uid);
622 if (sbi->gid != -1)
623 seq_printf(seq, ",gid=%d", sbi->gid);
624 if (sbi->umask != -1)
625 seq_printf(seq, ",umask=%03o", sbi->umask);
Mark Bellon8fc27512005-09-06 15:16:54 -0700626 if (sbi->flag & JFS_NOINTEGRITY)
627 seq_puts(seq, ",nointegrity");
Miklos Szeredi5c5e32c2008-01-24 16:13:21 -0600628 if (sbi->nls_tab)
629 seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset);
630 if (sbi->flag & JFS_ERR_CONTINUE)
631 seq_printf(seq, ",errors=continue");
632 if (sbi->flag & JFS_ERR_PANIC)
633 seq_printf(seq, ",errors=panic");
Mark Bellon8fc27512005-09-06 15:16:54 -0700634
Dave Kleikamp115ff502006-07-26 14:52:13 -0500635#ifdef CONFIG_QUOTA
Mark Bellon8fc27512005-09-06 15:16:54 -0700636 if (sbi->flag & JFS_USRQUOTA)
637 seq_puts(seq, ",usrquota");
638
639 if (sbi->flag & JFS_GRPQUOTA)
640 seq_puts(seq, ",grpquota");
641#endif
642
643 return 0;
644}
645
Dave Kleikamp115ff502006-07-26 14:52:13 -0500646#ifdef CONFIG_QUOTA
647
648/* Read data from quotafile - avoid pagecache and such because we cannot afford
649 * acquiring the locks... As quota files are never truncated and quota code
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300650 * itself serializes the operations (and no one else should touch the files)
Dave Kleikamp115ff502006-07-26 14:52:13 -0500651 * we don't have to be afraid of races */
652static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data,
653 size_t len, loff_t off)
654{
655 struct inode *inode = sb_dqopt(sb)->files[type];
656 sector_t blk = off >> sb->s_blocksize_bits;
657 int err = 0;
658 int offset = off & (sb->s_blocksize - 1);
659 int tocopy;
660 size_t toread;
661 struct buffer_head tmp_bh;
662 struct buffer_head *bh;
663 loff_t i_size = i_size_read(inode);
664
665 if (off > i_size)
666 return 0;
667 if (off+len > i_size)
668 len = i_size-off;
669 toread = len;
670 while (toread > 0) {
671 tocopy = sb->s_blocksize - offset < toread ?
672 sb->s_blocksize - offset : toread;
673
674 tmp_bh.b_state = 0;
675 tmp_bh.b_size = 1 << inode->i_blkbits;
676 err = jfs_get_block(inode, blk, &tmp_bh, 0);
677 if (err)
678 return err;
679 if (!buffer_mapped(&tmp_bh)) /* A hole? */
680 memset(data, 0, tocopy);
681 else {
682 bh = sb_bread(sb, tmp_bh.b_blocknr);
683 if (!bh)
684 return -EIO;
685 memcpy(data, bh->b_data+offset, tocopy);
686 brelse(bh);
687 }
688 offset = 0;
689 toread -= tocopy;
690 data += tocopy;
691 blk++;
692 }
693 return len;
694}
695
696/* Write to quotafile */
697static ssize_t jfs_quota_write(struct super_block *sb, int type,
698 const char *data, size_t len, loff_t off)
699{
700 struct inode *inode = sb_dqopt(sb)->files[type];
701 sector_t blk = off >> sb->s_blocksize_bits;
702 int err = 0;
703 int offset = off & (sb->s_blocksize - 1);
704 int tocopy;
705 size_t towrite = len;
706 struct buffer_head tmp_bh;
707 struct buffer_head *bh;
708
709 mutex_lock(&inode->i_mutex);
710 while (towrite > 0) {
711 tocopy = sb->s_blocksize - offset < towrite ?
712 sb->s_blocksize - offset : towrite;
713
714 tmp_bh.b_state = 0;
Dave Kleikamp8bcb2832006-07-28 08:46:05 -0500715 tmp_bh.b_size = 1 << inode->i_blkbits;
Dave Kleikamp115ff502006-07-26 14:52:13 -0500716 err = jfs_get_block(inode, blk, &tmp_bh, 1);
717 if (err)
718 goto out;
719 if (offset || tocopy != sb->s_blocksize)
720 bh = sb_bread(sb, tmp_bh.b_blocknr);
721 else
722 bh = sb_getblk(sb, tmp_bh.b_blocknr);
723 if (!bh) {
724 err = -EIO;
725 goto out;
726 }
727 lock_buffer(bh);
728 memcpy(bh->b_data+offset, data, tocopy);
729 flush_dcache_page(bh->b_page);
730 set_buffer_uptodate(bh);
731 mark_buffer_dirty(bh);
732 unlock_buffer(bh);
733 brelse(bh);
734 offset = 0;
735 towrite -= tocopy;
736 data += tocopy;
737 blk++;
738 }
739out:
Dan Carpenter9c836332009-04-07 14:48:16 +0300740 if (len == towrite) {
741 mutex_unlock(&inode->i_mutex);
Dave Kleikamp115ff502006-07-26 14:52:13 -0500742 return err;
Dan Carpenter9c836332009-04-07 14:48:16 +0300743 }
Dave Kleikamp115ff502006-07-26 14:52:13 -0500744 if (inode->i_size < off+len-towrite)
745 i_size_write(inode, off+len-towrite);
746 inode->i_version++;
747 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
748 mark_inode_dirty(inode);
749 mutex_unlock(&inode->i_mutex);
750 return len - towrite;
751}
752
753#endif
754
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800755static const struct super_operations jfs_super_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 .alloc_inode = jfs_alloc_inode,
757 .destroy_inode = jfs_destroy_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 .dirty_inode = jfs_dirty_inode,
759 .write_inode = jfs_write_inode,
Al Viro62aff862010-06-07 00:28:54 -0400760 .evict_inode = jfs_evict_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 .put_super = jfs_put_super,
762 .sync_fs = jfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800763 .freeze_fs = jfs_freeze,
764 .unfreeze_fs = jfs_unfreeze,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 .statfs = jfs_statfs,
766 .remount_fs = jfs_remount,
Dave Kleikamp115ff502006-07-26 14:52:13 -0500767 .show_options = jfs_show_options,
768#ifdef CONFIG_QUOTA
769 .quota_read = jfs_quota_read,
770 .quota_write = jfs_quota_write,
771#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772};
773
Christoph Hellwig39655162007-10-21 16:42:17 -0700774static const struct export_operations jfs_export_operations = {
Christoph Hellwigd425de72007-10-21 16:42:09 -0700775 .fh_to_dentry = jfs_fh_to_dentry,
776 .fh_to_parent = jfs_fh_to_parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 .get_parent = jfs_get_parent,
778};
779
780static struct file_system_type jfs_fs_type = {
781 .owner = THIS_MODULE,
782 .name = "jfs",
Al Viro152a0832010-07-25 00:46:55 +0400783 .mount = jfs_do_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 .kill_sb = kill_block_super,
785 .fs_flags = FS_REQUIRES_DEV,
786};
787
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700788static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789{
790 struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
791
Christoph Lametera35afb82007-05-16 22:10:57 -0700792 memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
793 INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
794 init_rwsem(&jfs_ip->rdwrlock);
795 mutex_init(&jfs_ip->commit_mutex);
796 init_rwsem(&jfs_ip->xattr_sem);
797 spin_lock_init(&jfs_ip->ag_lock);
798 jfs_ip->active_ag = -1;
Christoph Lametera35afb82007-05-16 22:10:57 -0700799 inode_init_once(&jfs_ip->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800}
801
802static int __init init_jfs_fs(void)
803{
804 int i;
805 int rc;
806
807 jfs_inode_cachep =
Dave Kleikamp63f83c92006-10-02 09:55:27 -0500808 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0,
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800809 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
Paul Mundt20c2df82007-07-20 10:11:58 +0900810 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 if (jfs_inode_cachep == NULL)
812 return -ENOMEM;
813
814 /*
815 * Metapage initialization
816 */
817 rc = metapage_init();
818 if (rc) {
819 jfs_err("metapage_init failed w/rc = %d", rc);
820 goto free_slab;
821 }
822
823 /*
824 * Transaction Manager initialization
825 */
826 rc = txInit();
827 if (rc) {
828 jfs_err("txInit failed w/rc = %d", rc);
829 goto free_metapage;
830 }
831
832 /*
833 * I/O completion thread (endio)
834 */
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600835 jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO");
836 if (IS_ERR(jfsIOthread)) {
837 rc = PTR_ERR(jfsIOthread);
838 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 goto end_txmngr;
840 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841
842 if (commit_threads < 1)
843 commit_threads = num_online_cpus();
844 if (commit_threads > MAX_COMMIT_THREADS)
845 commit_threads = MAX_COMMIT_THREADS;
846
847 for (i = 0; i < commit_threads; i++) {
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600848 jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit");
849 if (IS_ERR(jfsCommitThread[i])) {
850 rc = PTR_ERR(jfsCommitThread[i]);
851 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 commit_threads = i;
853 goto kill_committask;
854 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 }
856
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600857 jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync");
858 if (IS_ERR(jfsSyncThread)) {
859 rc = PTR_ERR(jfsSyncThread);
860 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 goto kill_committask;
862 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
864#ifdef PROC_FS_JFS
865 jfs_proc_init();
866#endif
867
Al Viro76bf09f2012-03-17 18:14:34 -0400868 rc = register_filesystem(&jfs_fs_type);
869 if (!rc)
870 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
Al Viro76bf09f2012-03-17 18:14:34 -0400872#ifdef PROC_FS_JFS
873 jfs_proc_clean();
874#endif
875 kthread_stop(jfsSyncThread);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876kill_committask:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 for (i = 0; i < commit_threads; i++)
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600878 kthread_stop(jfsCommitThread[i]);
879 kthread_stop(jfsIOthread);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880end_txmngr:
881 txExit();
882free_metapage:
883 metapage_exit();
884free_slab:
885 kmem_cache_destroy(jfs_inode_cachep);
886 return rc;
887}
888
889static void __exit exit_jfs_fs(void)
890{
891 int i;
892
893 jfs_info("exit_jfs_fs called");
894
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 txExit();
896 metapage_exit();
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600897
898 kthread_stop(jfsIOthread);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 for (i = 0; i < commit_threads; i++)
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600900 kthread_stop(jfsCommitThread[i]);
901 kthread_stop(jfsSyncThread);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902#ifdef PROC_FS_JFS
903 jfs_proc_clean();
904#endif
905 unregister_filesystem(&jfs_fs_type);
906 kmem_cache_destroy(jfs_inode_cachep);
907}
908
909module_init(init_jfs_fs)
910module_exit(exit_jfs_fs)