blob: d9b0e92b36021f235b00fa9549c865de5eee26af [file] [log] [blame]
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <asm/uaccess.h>
Mark Bellon8fc27512005-09-06 15:16:54 -070034#include <linux/seq_file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
36#include "jfs_incore.h"
37#include "jfs_filsys.h"
Dave Kleikamp1868f4a2005-05-04 15:29:35 -050038#include "jfs_inode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include "jfs_metapage.h"
40#include "jfs_superblock.h"
41#include "jfs_dmap.h"
42#include "jfs_imap.h"
43#include "jfs_acl.h"
44#include "jfs_debug.h"
45
46MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
47MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
48MODULE_LICENSE("GPL");
49
Christoph Lametere18b8902006-12-06 20:33:20 -080050static struct kmem_cache * jfs_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -080052static const struct super_operations jfs_super_operations;
Christoph Hellwig39655162007-10-21 16:42:17 -070053static const struct export_operations jfs_export_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054static struct file_system_type jfs_fs_type;
55
56#define MAX_COMMIT_THREADS 64
57static int commit_threads = 0;
58module_param(commit_threads, int, 0);
59MODULE_PARM_DESC(commit_threads, "Number of commit threads");
60
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -060061static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS];
62struct task_struct *jfsIOthread;
63struct task_struct *jfsSyncThread;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65#ifdef CONFIG_JFS_DEBUG
66int jfsloglevel = JFS_LOGLEVEL_WARN;
67module_param(jfsloglevel, int, 0644);
68MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
69#endif
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071static void jfs_handle_error(struct super_block *sb)
72{
73 struct jfs_sb_info *sbi = JFS_SBI(sb);
74
75 if (sb->s_flags & MS_RDONLY)
76 return;
77
78 updateSuper(sb, FM_DIRTY);
79
80 if (sbi->flag & JFS_ERR_PANIC)
81 panic("JFS (device %s): panic forced after error\n",
82 sb->s_id);
83 else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
84 jfs_err("ERROR: (device %s): remounting filesystem "
85 "as read-only\n",
86 sb->s_id);
87 sb->s_flags |= MS_RDONLY;
Dave Kleikamp63f83c92006-10-02 09:55:27 -050088 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
90 /* nothing is done for continue beyond marking the superblock dirty */
91}
92
93void jfs_error(struct super_block *sb, const char * function, ...)
94{
95 static char error_buf[256];
96 va_list args;
97
98 va_start(args, function);
Alexey Dobriyan4a6e6172006-12-06 20:37:04 -080099 vsnprintf(error_buf, sizeof(error_buf), function, args);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 va_end(args);
101
102 printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf);
103
104 jfs_handle_error(sb);
105}
106
107static struct inode *jfs_alloc_inode(struct super_block *sb)
108{
109 struct jfs_inode_info *jfs_inode;
110
111 jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
112 if (!jfs_inode)
113 return NULL;
114 return &jfs_inode->vfs_inode;
115}
116
117static void jfs_destroy_inode(struct inode *inode)
118{
119 struct jfs_inode_info *ji = JFS_IP(inode);
120
Dave Kleikamp8a9cd6d2005-08-10 11:14:39 -0500121 BUG_ON(!list_empty(&ji->anon_inode_list));
122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 spin_lock_irq(&ji->ag_lock);
124 if (ji->active_ag != -1) {
125 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
126 atomic_dec(&bmap->db_active[ji->active_ag]);
127 ji->active_ag = -1;
128 }
129 spin_unlock_irq(&ji->ag_lock);
130
131#ifdef CONFIG_JFS_POSIX_ACL
132 if (ji->i_acl != JFS_ACL_NOT_CACHED) {
133 posix_acl_release(ji->i_acl);
134 ji->i_acl = JFS_ACL_NOT_CACHED;
135 }
136 if (ji->i_default_acl != JFS_ACL_NOT_CACHED) {
137 posix_acl_release(ji->i_default_acl);
138 ji->i_default_acl = JFS_ACL_NOT_CACHED;
139 }
140#endif
141
142 kmem_cache_free(jfs_inode_cachep, ji);
143}
144
David Howells726c3342006-06-23 02:02:58 -0700145static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146{
David Howells726c3342006-06-23 02:02:58 -0700147 struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 s64 maxinodes;
149 struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
150
151 jfs_info("In jfs_statfs");
152 buf->f_type = JFS_SUPER_MAGIC;
153 buf->f_bsize = sbi->bsize;
154 buf->f_blocks = sbi->bmap->db_mapsize;
155 buf->f_bfree = sbi->bmap->db_nfree;
156 buf->f_bavail = sbi->bmap->db_nfree;
157 /*
158 * If we really return the number of allocated & free inodes, some
159 * applications will fail because they won't see enough free inodes.
160 * We'll try to calculate some guess as to how may inodes we can
161 * really allocate
162 *
163 * buf->f_files = atomic_read(&imap->im_numinos);
164 * buf->f_ffree = atomic_read(&imap->im_numfree);
165 */
166 maxinodes = min((s64) atomic_read(&imap->im_numinos) +
167 ((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
168 << L2INOSPEREXT), (s64) 0xffffffffLL);
169 buf->f_files = maxinodes;
170 buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
171 atomic_read(&imap->im_numfree));
Coly Lib5c816a2009-01-21 00:05:39 +0800172 buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2);
173 buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2,
174 sizeof(sbi->uuid)/2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
176 buf->f_namelen = JFS_NAME_MAX;
177 return 0;
178}
179
180static void jfs_put_super(struct super_block *sb)
181{
182 struct jfs_sb_info *sbi = JFS_SBI(sb);
183 int rc;
184
185 jfs_info("In jfs_put_super");
186 rc = jfs_umount(sb);
187 if (rc)
188 jfs_err("jfs_umount failed with return code %d", rc);
189 if (sbi->nls_tab)
190 unload_nls(sbi->nls_tab);
191 sbi->nls_tab = NULL;
192
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600193 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
194 iput(sbi->direct_inode);
195 sbi->direct_inode = NULL;
196
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 kfree(sbi);
198}
199
200enum {
201 Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
Mark Bellon8fc27512005-09-06 15:16:54 -0700202 Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600203 Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204};
205
Steven Whitehousea447c092008-10-13 10:46:57 +0100206static const match_table_t tokens = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 {Opt_integrity, "integrity"},
208 {Opt_nointegrity, "nointegrity"},
209 {Opt_iocharset, "iocharset=%s"},
210 {Opt_resize, "resize=%u"},
211 {Opt_resize_nosize, "resize"},
212 {Opt_errors, "errors=%s"},
213 {Opt_ignore, "noquota"},
214 {Opt_ignore, "quota"},
Mark Bellon8fc27512005-09-06 15:16:54 -0700215 {Opt_usrquota, "usrquota"},
216 {Opt_grpquota, "grpquota"},
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600217 {Opt_uid, "uid=%u"},
218 {Opt_gid, "gid=%u"},
219 {Opt_umask, "umask=%u"},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 {Opt_err, NULL}
221};
222
223static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
224 int *flag)
225{
226 void *nls_map = (void *)-1; /* -1: no change; NULL: none */
227 char *p;
228 struct jfs_sb_info *sbi = JFS_SBI(sb);
229
230 *newLVSize = 0;
231
232 if (!options)
233 return 1;
234
235 while ((p = strsep(&options, ",")) != NULL) {
236 substring_t args[MAX_OPT_ARGS];
237 int token;
238 if (!*p)
239 continue;
240
241 token = match_token(p, tokens, args);
242 switch (token) {
243 case Opt_integrity:
244 *flag &= ~JFS_NOINTEGRITY;
245 break;
246 case Opt_nointegrity:
247 *flag |= JFS_NOINTEGRITY;
248 break;
249 case Opt_ignore:
250 /* Silently ignore the quota options */
251 /* Don't do anything ;-) */
252 break;
253 case Opt_iocharset:
254 if (nls_map && nls_map != (void *) -1)
255 unload_nls(nls_map);
256 if (!strcmp(args[0].from, "none"))
257 nls_map = NULL;
258 else {
259 nls_map = load_nls(args[0].from);
260 if (!nls_map) {
261 printk(KERN_ERR
262 "JFS: charset not found\n");
263 goto cleanup;
264 }
265 }
266 break;
267 case Opt_resize:
268 {
269 char *resize = args[0].from;
270 *newLVSize = simple_strtoull(resize, &resize, 0);
271 break;
272 }
273 case Opt_resize_nosize:
274 {
275 *newLVSize = sb->s_bdev->bd_inode->i_size >>
276 sb->s_blocksize_bits;
277 if (*newLVSize == 0)
278 printk(KERN_ERR
279 "JFS: Cannot determine volume size\n");
280 break;
281 }
282 case Opt_errors:
283 {
284 char *errors = args[0].from;
285 if (!errors || !*errors)
286 goto cleanup;
287 if (!strcmp(errors, "continue")) {
288 *flag &= ~JFS_ERR_REMOUNT_RO;
289 *flag &= ~JFS_ERR_PANIC;
290 *flag |= JFS_ERR_CONTINUE;
291 } else if (!strcmp(errors, "remount-ro")) {
292 *flag &= ~JFS_ERR_CONTINUE;
293 *flag &= ~JFS_ERR_PANIC;
294 *flag |= JFS_ERR_REMOUNT_RO;
295 } else if (!strcmp(errors, "panic")) {
296 *flag &= ~JFS_ERR_CONTINUE;
297 *flag &= ~JFS_ERR_REMOUNT_RO;
298 *flag |= JFS_ERR_PANIC;
299 } else {
300 printk(KERN_ERR
301 "JFS: %s is an invalid error handler\n",
302 errors);
303 goto cleanup;
304 }
305 break;
306 }
Mark Bellon8fc27512005-09-06 15:16:54 -0700307
Dave Kleikamp115ff502006-07-26 14:52:13 -0500308#ifdef CONFIG_QUOTA
Mark Bellon8fc27512005-09-06 15:16:54 -0700309 case Opt_quota:
310 case Opt_usrquota:
311 *flag |= JFS_USRQUOTA;
312 break;
313 case Opt_grpquota:
314 *flag |= JFS_GRPQUOTA;
315 break;
316#else
317 case Opt_usrquota:
318 case Opt_grpquota:
319 case Opt_quota:
320 printk(KERN_ERR
321 "JFS: quota operations not supported\n");
322 break;
323#endif
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600324 case Opt_uid:
325 {
326 char *uid = args[0].from;
327 sbi->uid = simple_strtoul(uid, &uid, 0);
328 break;
329 }
330 case Opt_gid:
331 {
332 char *gid = args[0].from;
333 sbi->gid = simple_strtoul(gid, &gid, 0);
334 break;
335 }
336 case Opt_umask:
337 {
338 char *umask = args[0].from;
339 sbi->umask = simple_strtoul(umask, &umask, 8);
340 if (sbi->umask & ~0777) {
341 printk(KERN_ERR
342 "JFS: Invalid value of umask\n");
343 goto cleanup;
344 }
345 break;
346 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 default:
348 printk("jfs: Unrecognized mount option \"%s\" "
349 " or missing value\n", p);
350 goto cleanup;
351 }
352 }
353
354 if (nls_map != (void *) -1) {
355 /* Discard old (if remount) */
356 if (sbi->nls_tab)
357 unload_nls(sbi->nls_tab);
358 sbi->nls_tab = nls_map;
359 }
360 return 1;
361
362cleanup:
363 if (nls_map && nls_map != (void *) -1)
364 unload_nls(nls_map);
365 return 0;
366}
367
368static int jfs_remount(struct super_block *sb, int *flags, char *data)
369{
370 s64 newLVSize = 0;
371 int rc = 0;
372 int flag = JFS_SBI(sb)->flag;
373
374 if (!parse_options(data, sb, &newLVSize, &flag)) {
375 return -EINVAL;
376 }
377 if (newLVSize) {
378 if (sb->s_flags & MS_RDONLY) {
379 printk(KERN_ERR
380 "JFS: resize requires volume to be mounted read-write\n");
381 return -EROFS;
382 }
383 rc = jfs_extendfs(sb, newLVSize, 0);
384 if (rc)
385 return rc;
386 }
387
388 if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600389 /*
390 * Invalidate any previously read metadata. fsck may have
391 * changed the on-disk data since we mounted r/o
392 */
393 truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
394
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 JFS_SBI(sb)->flag = flag;
396 return jfs_mount_rw(sb, 1);
397 }
398 if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
399 rc = jfs_umount_rw(sb);
400 JFS_SBI(sb)->flag = flag;
401 return rc;
402 }
403 if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
404 if (!(sb->s_flags & MS_RDONLY)) {
405 rc = jfs_umount_rw(sb);
406 if (rc)
407 return rc;
408 JFS_SBI(sb)->flag = flag;
409 return jfs_mount_rw(sb, 1);
410 }
411 JFS_SBI(sb)->flag = flag;
412
413 return 0;
414}
415
416static int jfs_fill_super(struct super_block *sb, void *data, int silent)
417{
418 struct jfs_sb_info *sbi;
419 struct inode *inode;
420 int rc;
421 s64 newLVSize = 0;
David Howellseab1df72008-02-07 00:15:43 -0800422 int flag, ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
424 jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
425
426 if (!new_valid_dev(sb->s_bdev->bd_dev))
427 return -EOVERFLOW;
428
Eric Sesterhenn5b3030e2006-02-23 09:47:13 -0600429 sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 if (!sbi)
Akinobu Mita087387f2006-09-14 09:22:38 -0500431 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 sb->s_fs_info = sbi;
433 sbi->sb = sb;
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600434 sbi->uid = sbi->gid = sbi->umask = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
436 /* initialize the mount flag and determine the default error handler */
437 flag = JFS_ERR_REMOUNT_RO;
438
439 if (!parse_options((char *) data, sb, &newLVSize, &flag)) {
440 kfree(sbi);
441 return -EINVAL;
442 }
443 sbi->flag = flag;
444
445#ifdef CONFIG_JFS_POSIX_ACL
446 sb->s_flags |= MS_POSIXACL;
447#endif
448
449 if (newLVSize) {
450 printk(KERN_ERR "resize option for remount only\n");
451 return -EINVAL;
452 }
453
454 /*
455 * Initialize blocksize to 4K.
456 */
457 sb_set_blocksize(sb, PSIZE);
458
459 /*
460 * Set method vectors.
461 */
462 sb->s_op = &jfs_super_operations;
463 sb->s_export_op = &jfs_export_operations;
464
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600465 /*
466 * Initialize direct-mapping inode/address-space
467 */
468 inode = new_inode(sb);
David Howellseab1df72008-02-07 00:15:43 -0800469 if (inode == NULL) {
470 ret = -ENOMEM;
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600471 goto out_kfree;
David Howellseab1df72008-02-07 00:15:43 -0800472 }
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600473 inode->i_ino = 0;
474 inode->i_nlink = 1;
475 inode->i_size = sb->s_bdev->bd_inode->i_size;
476 inode->i_mapping->a_ops = &jfs_metapage_aops;
Dave Kleikampac17b8b2005-10-03 15:32:11 -0500477 insert_inode_hash(inode);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600478 mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
479
480 sbi->direct_inode = inode;
481
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 rc = jfs_mount(sb);
483 if (rc) {
484 if (!silent) {
485 jfs_err("jfs_mount failed w/return code = %d", rc);
486 }
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600487 goto out_mount_failed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 }
489 if (sb->s_flags & MS_RDONLY)
490 sbi->log = NULL;
491 else {
492 rc = jfs_mount_rw(sb, 0);
493 if (rc) {
494 if (!silent) {
495 jfs_err("jfs_mount_rw failed, return code = %d",
496 rc);
497 }
498 goto out_no_rw;
499 }
500 }
501
502 sb->s_magic = JFS_SUPER_MAGIC;
503
David Howellseab1df72008-02-07 00:15:43 -0800504 inode = jfs_iget(sb, ROOT_I);
505 if (IS_ERR(inode)) {
506 ret = PTR_ERR(inode);
Dave Kleikamp6536d282008-05-21 10:45:16 -0500507 goto out_no_rw;
David Howellseab1df72008-02-07 00:15:43 -0800508 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 sb->s_root = d_alloc_root(inode);
510 if (!sb->s_root)
511 goto out_no_root;
512
513 if (sbi->mntflag & JFS_OS2)
514 sb->s_root->d_op = &jfs_ci_dentry_operations;
515
516 /* logical blocks are represented by 40 bits in pxd_t, etc. */
517 sb->s_maxbytes = ((u64) sb->s_blocksize) << 40;
518#if BITS_PER_LONG == 32
519 /*
520 * Page cache is indexed by long.
521 * I would use MAX_LFS_FILESIZE, but it's only half as big
522 */
523 sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, sb->s_maxbytes);
524#endif
525 sb->s_time_gran = 1;
526 return 0;
527
528out_no_root:
Dave Kleikamp6536d282008-05-21 10:45:16 -0500529 jfs_err("jfs_read_super: get root dentry failed");
530 iput(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
532out_no_rw:
533 rc = jfs_umount(sb);
534 if (rc) {
535 jfs_err("jfs_umount failed with return code %d", rc);
536 }
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600537out_mount_failed:
OGAWA Hirofumi28fd1292006-01-08 01:02:14 -0800538 filemap_write_and_wait(sbi->direct_inode->i_mapping);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600539 truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
540 make_bad_inode(sbi->direct_inode);
541 iput(sbi->direct_inode);
542 sbi->direct_inode = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543out_kfree:
544 if (sbi->nls_tab)
545 unload_nls(sbi->nls_tab);
546 kfree(sbi);
David Howellseab1df72008-02-07 00:15:43 -0800547 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548}
549
Takashi Satoc4be0c12009-01-09 16:40:58 -0800550static int jfs_freeze(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551{
552 struct jfs_sb_info *sbi = JFS_SBI(sb);
553 struct jfs_log *log = sbi->log;
554
555 if (!(sb->s_flags & MS_RDONLY)) {
556 txQuiesce(sb);
557 lmLogShutdown(log);
558 updateSuper(sb, FM_CLEAN);
559 }
Takashi Satoc4be0c12009-01-09 16:40:58 -0800560 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561}
562
Takashi Satoc4be0c12009-01-09 16:40:58 -0800563static int jfs_unfreeze(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 int rc = 0;
568
569 if (!(sb->s_flags & MS_RDONLY)) {
570 updateSuper(sb, FM_MOUNT);
571 if ((rc = lmLogInit(log)))
572 jfs_err("jfs_unlock failed with return code %d", rc);
573 else
574 txResume(sb);
575 }
Takashi Satoc4be0c12009-01-09 16:40:58 -0800576 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577}
578
David Howells454e2392006-06-23 02:02:57 -0700579static int jfs_get_sb(struct file_system_type *fs_type,
580 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581{
David Howells454e2392006-06-23 02:02:57 -0700582 return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super,
583 mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584}
585
586static int jfs_sync_fs(struct super_block *sb, int wait)
587{
588 struct jfs_log *log = JFS_SBI(sb)->log;
589
590 /* log == NULL indicates read-only mount */
Dave Kleikamp1c627822005-05-02 12:25:08 -0600591 if (log) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 jfs_flush_journal(log, wait);
Dave Kleikampcbc3d652005-07-27 09:17:57 -0500593 jfs_syncpt(log, 0);
Dave Kleikamp1c627822005-05-02 12:25:08 -0600594 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595
596 return 0;
597}
598
Mark Bellon8fc27512005-09-06 15:16:54 -0700599static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
600{
601 struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb);
602
Dave Kleikamp69eb66d2006-03-09 13:59:30 -0600603 if (sbi->uid != -1)
604 seq_printf(seq, ",uid=%d", sbi->uid);
605 if (sbi->gid != -1)
606 seq_printf(seq, ",gid=%d", sbi->gid);
607 if (sbi->umask != -1)
608 seq_printf(seq, ",umask=%03o", sbi->umask);
Mark Bellon8fc27512005-09-06 15:16:54 -0700609 if (sbi->flag & JFS_NOINTEGRITY)
610 seq_puts(seq, ",nointegrity");
Miklos Szeredi5c5e32c2008-01-24 16:13:21 -0600611 if (sbi->nls_tab)
612 seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset);
613 if (sbi->flag & JFS_ERR_CONTINUE)
614 seq_printf(seq, ",errors=continue");
615 if (sbi->flag & JFS_ERR_PANIC)
616 seq_printf(seq, ",errors=panic");
Mark Bellon8fc27512005-09-06 15:16:54 -0700617
Dave Kleikamp115ff502006-07-26 14:52:13 -0500618#ifdef CONFIG_QUOTA
Mark Bellon8fc27512005-09-06 15:16:54 -0700619 if (sbi->flag & JFS_USRQUOTA)
620 seq_puts(seq, ",usrquota");
621
622 if (sbi->flag & JFS_GRPQUOTA)
623 seq_puts(seq, ",grpquota");
624#endif
625
626 return 0;
627}
628
Dave Kleikamp115ff502006-07-26 14:52:13 -0500629#ifdef CONFIG_QUOTA
630
631/* Read data from quotafile - avoid pagecache and such because we cannot afford
632 * acquiring the locks... As quota files are never truncated and quota code
633 * itself serializes the operations (and noone else should touch the files)
634 * we don't have to be afraid of races */
635static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data,
636 size_t len, loff_t off)
637{
638 struct inode *inode = sb_dqopt(sb)->files[type];
639 sector_t blk = off >> sb->s_blocksize_bits;
640 int err = 0;
641 int offset = off & (sb->s_blocksize - 1);
642 int tocopy;
643 size_t toread;
644 struct buffer_head tmp_bh;
645 struct buffer_head *bh;
646 loff_t i_size = i_size_read(inode);
647
648 if (off > i_size)
649 return 0;
650 if (off+len > i_size)
651 len = i_size-off;
652 toread = len;
653 while (toread > 0) {
654 tocopy = sb->s_blocksize - offset < toread ?
655 sb->s_blocksize - offset : toread;
656
657 tmp_bh.b_state = 0;
658 tmp_bh.b_size = 1 << inode->i_blkbits;
659 err = jfs_get_block(inode, blk, &tmp_bh, 0);
660 if (err)
661 return err;
662 if (!buffer_mapped(&tmp_bh)) /* A hole? */
663 memset(data, 0, tocopy);
664 else {
665 bh = sb_bread(sb, tmp_bh.b_blocknr);
666 if (!bh)
667 return -EIO;
668 memcpy(data, bh->b_data+offset, tocopy);
669 brelse(bh);
670 }
671 offset = 0;
672 toread -= tocopy;
673 data += tocopy;
674 blk++;
675 }
676 return len;
677}
678
679/* Write to quotafile */
680static ssize_t jfs_quota_write(struct super_block *sb, int type,
681 const char *data, size_t len, loff_t off)
682{
683 struct inode *inode = sb_dqopt(sb)->files[type];
684 sector_t blk = off >> sb->s_blocksize_bits;
685 int err = 0;
686 int offset = off & (sb->s_blocksize - 1);
687 int tocopy;
688 size_t towrite = len;
689 struct buffer_head tmp_bh;
690 struct buffer_head *bh;
691
692 mutex_lock(&inode->i_mutex);
693 while (towrite > 0) {
694 tocopy = sb->s_blocksize - offset < towrite ?
695 sb->s_blocksize - offset : towrite;
696
697 tmp_bh.b_state = 0;
Dave Kleikamp8bcb2832006-07-28 08:46:05 -0500698 tmp_bh.b_size = 1 << inode->i_blkbits;
Dave Kleikamp115ff502006-07-26 14:52:13 -0500699 err = jfs_get_block(inode, blk, &tmp_bh, 1);
700 if (err)
701 goto out;
702 if (offset || tocopy != sb->s_blocksize)
703 bh = sb_bread(sb, tmp_bh.b_blocknr);
704 else
705 bh = sb_getblk(sb, tmp_bh.b_blocknr);
706 if (!bh) {
707 err = -EIO;
708 goto out;
709 }
710 lock_buffer(bh);
711 memcpy(bh->b_data+offset, data, tocopy);
712 flush_dcache_page(bh->b_page);
713 set_buffer_uptodate(bh);
714 mark_buffer_dirty(bh);
715 unlock_buffer(bh);
716 brelse(bh);
717 offset = 0;
718 towrite -= tocopy;
719 data += tocopy;
720 blk++;
721 }
722out:
Dan Carpenter9c836332009-04-07 14:48:16 +0300723 if (len == towrite) {
724 mutex_unlock(&inode->i_mutex);
Dave Kleikamp115ff502006-07-26 14:52:13 -0500725 return err;
Dan Carpenter9c836332009-04-07 14:48:16 +0300726 }
Dave Kleikamp115ff502006-07-26 14:52:13 -0500727 if (inode->i_size < off+len-towrite)
728 i_size_write(inode, off+len-towrite);
729 inode->i_version++;
730 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
731 mark_inode_dirty(inode);
732 mutex_unlock(&inode->i_mutex);
733 return len - towrite;
734}
735
736#endif
737
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800738static const struct super_operations jfs_super_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 .alloc_inode = jfs_alloc_inode,
740 .destroy_inode = jfs_destroy_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 .dirty_inode = jfs_dirty_inode,
742 .write_inode = jfs_write_inode,
743 .delete_inode = jfs_delete_inode,
744 .put_super = jfs_put_super,
745 .sync_fs = jfs_sync_fs,
Takashi Satoc4be0c12009-01-09 16:40:58 -0800746 .freeze_fs = jfs_freeze,
747 .unfreeze_fs = jfs_unfreeze,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 .statfs = jfs_statfs,
749 .remount_fs = jfs_remount,
Dave Kleikamp115ff502006-07-26 14:52:13 -0500750 .show_options = jfs_show_options,
751#ifdef CONFIG_QUOTA
752 .quota_read = jfs_quota_read,
753 .quota_write = jfs_quota_write,
754#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755};
756
Christoph Hellwig39655162007-10-21 16:42:17 -0700757static const struct export_operations jfs_export_operations = {
Christoph Hellwigd425de72007-10-21 16:42:09 -0700758 .fh_to_dentry = jfs_fh_to_dentry,
759 .fh_to_parent = jfs_fh_to_parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 .get_parent = jfs_get_parent,
761};
762
763static struct file_system_type jfs_fs_type = {
764 .owner = THIS_MODULE,
765 .name = "jfs",
766 .get_sb = jfs_get_sb,
767 .kill_sb = kill_block_super,
768 .fs_flags = FS_REQUIRES_DEV,
769};
770
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700771static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772{
773 struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;
774
Christoph Lametera35afb82007-05-16 22:10:57 -0700775 memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
776 INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
777 init_rwsem(&jfs_ip->rdwrlock);
778 mutex_init(&jfs_ip->commit_mutex);
779 init_rwsem(&jfs_ip->xattr_sem);
780 spin_lock_init(&jfs_ip->ag_lock);
781 jfs_ip->active_ag = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782#ifdef CONFIG_JFS_POSIX_ACL
Christoph Lametera35afb82007-05-16 22:10:57 -0700783 jfs_ip->i_acl = JFS_ACL_NOT_CACHED;
784 jfs_ip->i_default_acl = JFS_ACL_NOT_CACHED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785#endif
Christoph Lametera35afb82007-05-16 22:10:57 -0700786 inode_init_once(&jfs_ip->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787}
788
789static int __init init_jfs_fs(void)
790{
791 int i;
792 int rc;
793
794 jfs_inode_cachep =
Dave Kleikamp63f83c92006-10-02 09:55:27 -0500795 kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0,
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800796 SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
Paul Mundt20c2df82007-07-20 10:11:58 +0900797 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 if (jfs_inode_cachep == NULL)
799 return -ENOMEM;
800
801 /*
802 * Metapage initialization
803 */
804 rc = metapage_init();
805 if (rc) {
806 jfs_err("metapage_init failed w/rc = %d", rc);
807 goto free_slab;
808 }
809
810 /*
811 * Transaction Manager initialization
812 */
813 rc = txInit();
814 if (rc) {
815 jfs_err("txInit failed w/rc = %d", rc);
816 goto free_metapage;
817 }
818
819 /*
820 * I/O completion thread (endio)
821 */
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600822 jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO");
823 if (IS_ERR(jfsIOthread)) {
824 rc = PTR_ERR(jfsIOthread);
825 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 goto end_txmngr;
827 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828
829 if (commit_threads < 1)
830 commit_threads = num_online_cpus();
831 if (commit_threads > MAX_COMMIT_THREADS)
832 commit_threads = MAX_COMMIT_THREADS;
833
834 for (i = 0; i < commit_threads; i++) {
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600835 jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, "jfsCommit");
836 if (IS_ERR(jfsCommitThread[i])) {
837 rc = PTR_ERR(jfsCommitThread[i]);
838 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 commit_threads = i;
840 goto kill_committask;
841 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 }
843
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600844 jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync");
845 if (IS_ERR(jfsSyncThread)) {
846 rc = PTR_ERR(jfsSyncThread);
847 jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 goto kill_committask;
849 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
851#ifdef PROC_FS_JFS
852 jfs_proc_init();
853#endif
854
855 return register_filesystem(&jfs_fs_type);
856
857kill_committask:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 for (i = 0; i < commit_threads; i++)
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600859 kthread_stop(jfsCommitThread[i]);
860 kthread_stop(jfsIOthread);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861end_txmngr:
862 txExit();
863free_metapage:
864 metapage_exit();
865free_slab:
866 kmem_cache_destroy(jfs_inode_cachep);
867 return rc;
868}
869
870static void __exit exit_jfs_fs(void)
871{
872 int i;
873
874 jfs_info("exit_jfs_fs called");
875
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 txExit();
877 metapage_exit();
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600878
879 kthread_stop(jfsIOthread);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 for (i = 0; i < commit_threads; i++)
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600881 kthread_stop(jfsCommitThread[i]);
882 kthread_stop(jfsSyncThread);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883#ifdef PROC_FS_JFS
884 jfs_proc_clean();
885#endif
886 unregister_filesystem(&jfs_fs_type);
887 kmem_cache_destroy(jfs_inode_cachep);
888}
889
890module_init(init_jfs_fs)
891module_exit(exit_jfs_fs)