2 * linux/fs/ext3/super.c
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
11 * linux/fs/minix/inode.c
13 * Copyright (C) 1991, 1992 Linus Torvalds
15 * Big-endian to little-endian byte-swapping/bitmaps by
16 * David S. Miller (davem@caip.rutgers.edu), 1995
19 #include <linux/module.h>
20 #include <linux/string.h>
22 #include <linux/time.h>
23 #include <linux/jbd.h>
24 #include <linux/ext3_fs.h>
25 #include <linux/ext3_jbd.h>
26 #include <linux/slab.h>
27 #include <linux/init.h>
28 #include <linux/blkdev.h>
29 #include <linux/parser.h>
30 #include <linux/smp_lock.h>
31 #include <linux/buffer_head.h>
32 #include <linux/exportfs.h>
33 #include <linux/vfs.h>
34 #include <linux/random.h>
35 #include <linux/mount.h>
36 #include <linux/namei.h>
37 #include <linux/quotaops.h>
38 #include <linux/seq_file.h>
39 #include <linux/log2.h>
41 #include <asm/uaccess.h>
47 #ifdef CONFIG_EXT3_DEFAULTS_TO_ORDERED
48 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_ORDERED_DATA
50 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_WRITEBACK_DATA
53 static int ext3_load_journal(struct super_block *, struct ext3_super_block *,
54 unsigned long journal_devnum);
55 static int ext3_create_journal(struct super_block *, struct ext3_super_block *,
57 static int ext3_commit_super(struct super_block *sb,
58 struct ext3_super_block *es,
60 static void ext3_mark_recovery_complete(struct super_block * sb,
61 struct ext3_super_block * es);
62 static void ext3_clear_journal_err(struct super_block * sb,
63 struct ext3_super_block * es);
64 static int ext3_sync_fs(struct super_block *sb, int wait);
65 static const char *ext3_decode_error(struct super_block * sb, int errno,
67 static int ext3_remount (struct super_block * sb, int * flags, char * data);
68 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf);
69 static int ext3_unfreeze(struct super_block *sb);
70 static int ext3_freeze(struct super_block *sb);
73 * Wrappers for journal_start/end.
75 * The only special thing we need to do here is to make sure that all
76 * journal_end calls result in the superblock being marked dirty, so
77 * that sync() will call the filesystem's write_super callback if
80 handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
84 if (sb->s_flags & MS_RDONLY)
85 return ERR_PTR(-EROFS);
87 /* Special case here: if the journal has aborted behind our
88 * backs (eg. EIO in the commit thread), then we still need to
89 * take the FS itself readonly cleanly. */
90 journal = EXT3_SB(sb)->s_journal;
91 if (is_journal_aborted(journal)) {
92 ext3_abort(sb, __func__,
93 "Detected aborted journal");
94 return ERR_PTR(-EROFS);
97 return journal_start(journal, nblocks);
101 * The only special thing we need to do here is to make sure that all
102 * journal_stop calls result in the superblock being marked dirty, so
103 * that sync() will call the filesystem's write_super callback if
106 int __ext3_journal_stop(const char *where, handle_t *handle)
108 struct super_block *sb;
112 sb = handle->h_transaction->t_journal->j_private;
114 rc = journal_stop(handle);
119 __ext3_std_error(sb, where, err);
123 void ext3_journal_abort_handle(const char *caller, const char *err_fn,
124 struct buffer_head *bh, handle_t *handle, int err)
127 const char *errstr = ext3_decode_error(NULL, err, nbuf);
130 BUFFER_TRACE(bh, "abort");
135 if (is_handle_aborted(handle))
138 printk(KERN_ERR "%s: aborting transaction: %s in %s\n",
139 caller, errstr, err_fn);
141 journal_abort_handle(handle);
144 /* Deal with the reporting of failure conditions on a filesystem such as
145 * inconsistencies detected or read IO failures.
147 * On ext2, we can store the error state of the filesystem in the
148 * superblock. That is not possible on ext3, because we may have other
149 * write ordering constraints on the superblock which prevent us from
150 * writing it out straight away; and given that the journal is about to
151 * be aborted, we can't rely on the current, or future, transactions to
152 * write out the superblock safely.
154 * We'll just use the journal_abort() error code to record an error in
155 * the journal instead. On recovery, the journal will compain about
156 * that error until we've noted it down and cleared it.
159 static void ext3_handle_error(struct super_block *sb)
161 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
163 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
164 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
166 if (sb->s_flags & MS_RDONLY)
169 if (!test_opt (sb, ERRORS_CONT)) {
170 journal_t *journal = EXT3_SB(sb)->s_journal;
172 EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
174 journal_abort(journal, -EIO);
176 if (test_opt (sb, ERRORS_RO)) {
177 printk (KERN_CRIT "Remounting filesystem read-only\n");
178 sb->s_flags |= MS_RDONLY;
180 ext3_commit_super(sb, es, 1);
181 if (test_opt(sb, ERRORS_PANIC))
182 panic("EXT3-fs (device %s): panic forced after error\n",
186 void ext3_error (struct super_block * sb, const char * function,
187 const char * fmt, ...)
192 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
197 ext3_handle_error(sb);
200 static const char *ext3_decode_error(struct super_block * sb, int errno,
207 errstr = "IO failure";
210 errstr = "Out of memory";
213 if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT)
214 errstr = "Journal has aborted";
216 errstr = "Readonly filesystem";
219 /* If the caller passed in an extra buffer for unknown
220 * errors, textualise them now. Else we just return
223 /* Check for truncated error codes... */
224 if (snprintf(nbuf, 16, "error %d", -errno) >= 0)
233 /* __ext3_std_error decodes expected errors from journaling functions
234 * automatically and invokes the appropriate error response. */
236 void __ext3_std_error (struct super_block * sb, const char * function,
242 /* Special case: if the error is EROFS, and we're not already
243 * inside a transaction, then there's really no point in logging
245 if (errno == -EROFS && journal_current_handle() == NULL &&
246 (sb->s_flags & MS_RDONLY))
249 errstr = ext3_decode_error(sb, errno, nbuf);
250 printk (KERN_CRIT "EXT3-fs error (device %s) in %s: %s\n",
251 sb->s_id, function, errstr);
253 ext3_handle_error(sb);
257 * ext3_abort is a much stronger failure handler than ext3_error. The
258 * abort function may be used to deal with unrecoverable failures such
259 * as journal IO errors or ENOMEM at a critical moment in log management.
261 * We unconditionally force the filesystem into an ABORT|READONLY state,
262 * unless the error response on the fs has been set to panic in which
263 * case we take the easy way out and panic immediately.
266 void ext3_abort (struct super_block * sb, const char * function,
267 const char * fmt, ...)
271 printk (KERN_CRIT "ext3_abort called.\n");
274 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
279 if (test_opt(sb, ERRORS_PANIC))
280 panic("EXT3-fs panic from previous error\n");
282 if (sb->s_flags & MS_RDONLY)
285 printk(KERN_CRIT "Remounting filesystem read-only\n");
286 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
287 sb->s_flags |= MS_RDONLY;
288 EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
289 if (EXT3_SB(sb)->s_journal)
290 journal_abort(EXT3_SB(sb)->s_journal, -EIO);
293 void ext3_warning (struct super_block * sb, const char * function,
294 const char * fmt, ...)
299 printk(KERN_WARNING "EXT3-fs warning (device %s): %s: ",
306 void ext3_update_dynamic_rev(struct super_block *sb)
308 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
310 if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV)
313 ext3_warning(sb, __func__,
314 "updating to rev %d because of new feature flag, "
315 "running e2fsck is recommended",
318 es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO);
319 es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE);
320 es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV);
321 /* leave es->s_feature_*compat flags alone */
322 /* es->s_uuid will be set by e2fsck if empty */
325 * The rest of the superblock fields should be zero, and if not it
326 * means they are likely already in use, so leave them alone. We
327 * can leave it up to e2fsck to clean up any inconsistencies there.
332 * Open the external journal device
334 static struct block_device *ext3_blkdev_get(dev_t dev)
336 struct block_device *bdev;
337 char b[BDEVNAME_SIZE];
339 bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE);
345 printk(KERN_ERR "EXT3: failed to open journal device %s: %ld\n",
346 __bdevname(dev, b), PTR_ERR(bdev));
351 * Release the journal device
353 static int ext3_blkdev_put(struct block_device *bdev)
356 return blkdev_put(bdev, FMODE_READ|FMODE_WRITE);
359 static int ext3_blkdev_remove(struct ext3_sb_info *sbi)
361 struct block_device *bdev;
364 bdev = sbi->journal_bdev;
366 ret = ext3_blkdev_put(bdev);
367 sbi->journal_bdev = NULL;
372 static inline struct inode *orphan_list_entry(struct list_head *l)
374 return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode;
377 static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
381 printk(KERN_ERR "sb orphan head is %d\n",
382 le32_to_cpu(sbi->s_es->s_last_orphan));
384 printk(KERN_ERR "sb_info orphan list:\n");
385 list_for_each(l, &sbi->s_orphan) {
386 struct inode *inode = orphan_list_entry(l);
388 "inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
389 inode->i_sb->s_id, inode->i_ino, inode,
390 inode->i_mode, inode->i_nlink,
395 static void ext3_put_super (struct super_block * sb)
397 struct ext3_sb_info *sbi = EXT3_SB(sb);
398 struct ext3_super_block *es = sbi->s_es;
403 ext3_xattr_put_super(sb);
404 err = journal_destroy(sbi->s_journal);
405 sbi->s_journal = NULL;
407 ext3_abort(sb, __func__, "Couldn't clean up the journal");
409 if (!(sb->s_flags & MS_RDONLY)) {
410 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
411 es->s_state = cpu_to_le16(sbi->s_mount_state);
412 BUFFER_TRACE(sbi->s_sbh, "marking dirty");
413 mark_buffer_dirty(sbi->s_sbh);
414 ext3_commit_super(sb, es, 1);
417 for (i = 0; i < sbi->s_gdb_count; i++)
418 brelse(sbi->s_group_desc[i]);
419 kfree(sbi->s_group_desc);
420 percpu_counter_destroy(&sbi->s_freeblocks_counter);
421 percpu_counter_destroy(&sbi->s_freeinodes_counter);
422 percpu_counter_destroy(&sbi->s_dirs_counter);
425 for (i = 0; i < MAXQUOTAS; i++)
426 kfree(sbi->s_qf_names[i]);
429 /* Debugging code just in case the in-memory inode orphan list
430 * isn't empty. The on-disk one can be non-empty if we've
431 * detected an error and taken the fs readonly, but the
432 * in-memory list had better be clean by this point. */
433 if (!list_empty(&sbi->s_orphan))
434 dump_orphan_list(sb, sbi);
435 J_ASSERT(list_empty(&sbi->s_orphan));
437 invalidate_bdev(sb->s_bdev);
438 if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) {
440 * Invalidate the journal device's buffers. We don't want them
441 * floating about in memory - the physical journal device may
442 * hotswapped, and it breaks the `ro-after' testing code.
444 sync_blockdev(sbi->journal_bdev);
445 invalidate_bdev(sbi->journal_bdev);
446 ext3_blkdev_remove(sbi);
448 sb->s_fs_info = NULL;
449 kfree(sbi->s_blockgroup_lock);
455 static struct kmem_cache *ext3_inode_cachep;
458 * Called inside transaction, so use GFP_NOFS
460 static struct inode *ext3_alloc_inode(struct super_block *sb)
462 struct ext3_inode_info *ei;
464 ei = kmem_cache_alloc(ext3_inode_cachep, GFP_NOFS);
467 #ifdef CONFIG_EXT3_FS_POSIX_ACL
468 ei->i_acl = EXT3_ACL_NOT_CACHED;
469 ei->i_default_acl = EXT3_ACL_NOT_CACHED;
471 ei->i_block_alloc_info = NULL;
472 ei->vfs_inode.i_version = 1;
473 return &ei->vfs_inode;
476 static void ext3_destroy_inode(struct inode *inode)
478 if (!list_empty(&(EXT3_I(inode)->i_orphan))) {
479 printk("EXT3 Inode %p: orphan list check failed!\n",
481 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4,
482 EXT3_I(inode), sizeof(struct ext3_inode_info),
486 kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
489 static void init_once(void *foo)
491 struct ext3_inode_info *ei = (struct ext3_inode_info *) foo;
493 INIT_LIST_HEAD(&ei->i_orphan);
494 #ifdef CONFIG_EXT3_FS_XATTR
495 init_rwsem(&ei->xattr_sem);
497 mutex_init(&ei->truncate_mutex);
498 inode_init_once(&ei->vfs_inode);
501 static int init_inodecache(void)
503 ext3_inode_cachep = kmem_cache_create("ext3_inode_cache",
504 sizeof(struct ext3_inode_info),
505 0, (SLAB_RECLAIM_ACCOUNT|
508 if (ext3_inode_cachep == NULL)
513 static void destroy_inodecache(void)
515 kmem_cache_destroy(ext3_inode_cachep);
518 static void ext3_clear_inode(struct inode *inode)
520 struct ext3_block_alloc_info *rsv = EXT3_I(inode)->i_block_alloc_info;
521 #ifdef CONFIG_EXT3_FS_POSIX_ACL
522 if (EXT3_I(inode)->i_acl &&
523 EXT3_I(inode)->i_acl != EXT3_ACL_NOT_CACHED) {
524 posix_acl_release(EXT3_I(inode)->i_acl);
525 EXT3_I(inode)->i_acl = EXT3_ACL_NOT_CACHED;
527 if (EXT3_I(inode)->i_default_acl &&
528 EXT3_I(inode)->i_default_acl != EXT3_ACL_NOT_CACHED) {
529 posix_acl_release(EXT3_I(inode)->i_default_acl);
530 EXT3_I(inode)->i_default_acl = EXT3_ACL_NOT_CACHED;
533 ext3_discard_reservation(inode);
534 EXT3_I(inode)->i_block_alloc_info = NULL;
539 static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb)
541 #if defined(CONFIG_QUOTA)
542 struct ext3_sb_info *sbi = EXT3_SB(sb);
544 if (sbi->s_jquota_fmt)
545 seq_printf(seq, ",jqfmt=%s",
546 (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0");
548 if (sbi->s_qf_names[USRQUOTA])
549 seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]);
551 if (sbi->s_qf_names[GRPQUOTA])
552 seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]);
554 if (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA)
555 seq_puts(seq, ",usrquota");
557 if (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)
558 seq_puts(seq, ",grpquota");
564 * - it's set to a non-default value OR
565 * - if the per-sb default is different from the global default
567 static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
569 struct super_block *sb = vfs->mnt_sb;
570 struct ext3_sb_info *sbi = EXT3_SB(sb);
571 struct ext3_super_block *es = sbi->s_es;
572 unsigned long def_mount_opts;
574 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
576 if (sbi->s_sb_block != 1)
577 seq_printf(seq, ",sb=%lu", sbi->s_sb_block);
578 if (test_opt(sb, MINIX_DF))
579 seq_puts(seq, ",minixdf");
580 if (test_opt(sb, GRPID))
581 seq_puts(seq, ",grpid");
582 if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS))
583 seq_puts(seq, ",nogrpid");
584 if (sbi->s_resuid != EXT3_DEF_RESUID ||
585 le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) {
586 seq_printf(seq, ",resuid=%u", sbi->s_resuid);
588 if (sbi->s_resgid != EXT3_DEF_RESGID ||
589 le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) {
590 seq_printf(seq, ",resgid=%u", sbi->s_resgid);
592 if (test_opt(sb, ERRORS_RO)) {
593 int def_errors = le16_to_cpu(es->s_errors);
595 if (def_errors == EXT3_ERRORS_PANIC ||
596 def_errors == EXT3_ERRORS_CONTINUE) {
597 seq_puts(seq, ",errors=remount-ro");
600 if (test_opt(sb, ERRORS_CONT))
601 seq_puts(seq, ",errors=continue");
602 if (test_opt(sb, ERRORS_PANIC))
603 seq_puts(seq, ",errors=panic");
604 if (test_opt(sb, NO_UID32))
605 seq_puts(seq, ",nouid32");
606 if (test_opt(sb, DEBUG))
607 seq_puts(seq, ",debug");
608 if (test_opt(sb, OLDALLOC))
609 seq_puts(seq, ",oldalloc");
610 #ifdef CONFIG_EXT3_FS_XATTR
611 if (test_opt(sb, XATTR_USER))
612 seq_puts(seq, ",user_xattr");
613 if (!test_opt(sb, XATTR_USER) &&
614 (def_mount_opts & EXT3_DEFM_XATTR_USER)) {
615 seq_puts(seq, ",nouser_xattr");
618 #ifdef CONFIG_EXT3_FS_POSIX_ACL
619 if (test_opt(sb, POSIX_ACL))
620 seq_puts(seq, ",acl");
621 if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL))
622 seq_puts(seq, ",noacl");
624 if (!test_opt(sb, RESERVATION))
625 seq_puts(seq, ",noreservation");
626 if (sbi->s_commit_interval) {
627 seq_printf(seq, ",commit=%u",
628 (unsigned) (sbi->s_commit_interval / HZ));
630 if (test_opt(sb, BARRIER))
631 seq_puts(seq, ",barrier=1");
632 if (test_opt(sb, NOBH))
633 seq_puts(seq, ",nobh");
635 if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA)
636 seq_puts(seq, ",data=journal");
637 else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA)
638 seq_puts(seq, ",data=ordered");
639 else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)
640 seq_puts(seq, ",data=writeback");
642 if (test_opt(sb, DATA_ERR_ABORT))
643 seq_puts(seq, ",data_err=abort");
645 ext3_show_quota_options(seq, sb);
651 static struct inode *ext3_nfs_get_inode(struct super_block *sb,
652 u64 ino, u32 generation)
656 if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO)
657 return ERR_PTR(-ESTALE);
658 if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count))
659 return ERR_PTR(-ESTALE);
661 /* iget isn't really right if the inode is currently unallocated!!
663 * ext3_read_inode will return a bad_inode if the inode had been
664 * deleted, so we should be safe.
666 * Currently we don't know the generation for parent directory, so
667 * a generation of 0 means "accept any"
669 inode = ext3_iget(sb, ino);
671 return ERR_CAST(inode);
672 if (generation && inode->i_generation != generation) {
674 return ERR_PTR(-ESTALE);
680 static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid,
681 int fh_len, int fh_type)
683 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
687 static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid,
688 int fh_len, int fh_type)
690 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
695 * Try to release metadata pages (indirect blocks, directories) which are
696 * mapped via the block device. Since these pages could have journal heads
697 * which would prevent try_to_free_buffers() from freeing them, we must use
698 * jbd layer's try_to_free_buffers() function to release them.
700 static int bdev_try_to_free_page(struct super_block *sb, struct page *page,
703 journal_t *journal = EXT3_SB(sb)->s_journal;
705 WARN_ON(PageChecked(page));
706 if (!page_has_buffers(page))
709 return journal_try_to_free_buffers(journal, page,
711 return try_to_free_buffers(page);
715 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
716 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
718 static int ext3_write_dquot(struct dquot *dquot);
719 static int ext3_acquire_dquot(struct dquot *dquot);
720 static int ext3_release_dquot(struct dquot *dquot);
721 static int ext3_mark_dquot_dirty(struct dquot *dquot);
722 static int ext3_write_info(struct super_block *sb, int type);
723 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
724 char *path, int remount);
725 static int ext3_quota_on_mount(struct super_block *sb, int type);
726 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
727 size_t len, loff_t off);
728 static ssize_t ext3_quota_write(struct super_block *sb, int type,
729 const char *data, size_t len, loff_t off);
731 static struct dquot_operations ext3_quota_operations = {
732 .initialize = dquot_initialize,
734 .alloc_space = dquot_alloc_space,
735 .alloc_inode = dquot_alloc_inode,
736 .free_space = dquot_free_space,
737 .free_inode = dquot_free_inode,
738 .transfer = dquot_transfer,
739 .write_dquot = ext3_write_dquot,
740 .acquire_dquot = ext3_acquire_dquot,
741 .release_dquot = ext3_release_dquot,
742 .mark_dirty = ext3_mark_dquot_dirty,
743 .write_info = ext3_write_info,
744 .alloc_dquot = dquot_alloc,
745 .destroy_dquot = dquot_destroy,
748 static struct quotactl_ops ext3_qctl_operations = {
749 .quota_on = ext3_quota_on,
750 .quota_off = vfs_quota_off,
751 .quota_sync = vfs_quota_sync,
752 .get_info = vfs_get_dqinfo,
753 .set_info = vfs_set_dqinfo,
754 .get_dqblk = vfs_get_dqblk,
755 .set_dqblk = vfs_set_dqblk
759 static const struct super_operations ext3_sops = {
760 .alloc_inode = ext3_alloc_inode,
761 .destroy_inode = ext3_destroy_inode,
762 .write_inode = ext3_write_inode,
763 .dirty_inode = ext3_dirty_inode,
764 .delete_inode = ext3_delete_inode,
765 .put_super = ext3_put_super,
766 .sync_fs = ext3_sync_fs,
767 .freeze_fs = ext3_freeze,
768 .unfreeze_fs = ext3_unfreeze,
769 .statfs = ext3_statfs,
770 .remount_fs = ext3_remount,
771 .clear_inode = ext3_clear_inode,
772 .show_options = ext3_show_options,
774 .quota_read = ext3_quota_read,
775 .quota_write = ext3_quota_write,
777 .bdev_try_to_free_page = bdev_try_to_free_page,
780 static const struct export_operations ext3_export_ops = {
781 .fh_to_dentry = ext3_fh_to_dentry,
782 .fh_to_parent = ext3_fh_to_parent,
783 .get_parent = ext3_get_parent,
787 Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
788 Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
789 Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
790 Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
791 Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
792 Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
793 Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
794 Opt_data_err_abort, Opt_data_err_ignore,
795 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
796 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
797 Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
801 static const match_table_t tokens = {
802 {Opt_bsd_df, "bsddf"},
803 {Opt_minix_df, "minixdf"},
804 {Opt_grpid, "grpid"},
805 {Opt_grpid, "bsdgroups"},
806 {Opt_nogrpid, "nogrpid"},
807 {Opt_nogrpid, "sysvgroups"},
808 {Opt_resgid, "resgid=%u"},
809 {Opt_resuid, "resuid=%u"},
811 {Opt_err_cont, "errors=continue"},
812 {Opt_err_panic, "errors=panic"},
813 {Opt_err_ro, "errors=remount-ro"},
814 {Opt_nouid32, "nouid32"},
815 {Opt_nocheck, "nocheck"},
816 {Opt_nocheck, "check=none"},
817 {Opt_debug, "debug"},
818 {Opt_oldalloc, "oldalloc"},
819 {Opt_orlov, "orlov"},
820 {Opt_user_xattr, "user_xattr"},
821 {Opt_nouser_xattr, "nouser_xattr"},
823 {Opt_noacl, "noacl"},
824 {Opt_reservation, "reservation"},
825 {Opt_noreservation, "noreservation"},
826 {Opt_noload, "noload"},
829 {Opt_commit, "commit=%u"},
830 {Opt_journal_update, "journal=update"},
831 {Opt_journal_inum, "journal=%u"},
832 {Opt_journal_dev, "journal_dev=%u"},
833 {Opt_abort, "abort"},
834 {Opt_data_journal, "data=journal"},
835 {Opt_data_ordered, "data=ordered"},
836 {Opt_data_writeback, "data=writeback"},
837 {Opt_data_err_abort, "data_err=abort"},
838 {Opt_data_err_ignore, "data_err=ignore"},
839 {Opt_offusrjquota, "usrjquota="},
840 {Opt_usrjquota, "usrjquota=%s"},
841 {Opt_offgrpjquota, "grpjquota="},
842 {Opt_grpjquota, "grpjquota=%s"},
843 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
844 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
845 {Opt_grpquota, "grpquota"},
846 {Opt_noquota, "noquota"},
847 {Opt_quota, "quota"},
848 {Opt_usrquota, "usrquota"},
849 {Opt_barrier, "barrier=%u"},
850 {Opt_resize, "resize"},
854 static ext3_fsblk_t get_sb_block(void **data)
856 ext3_fsblk_t sb_block;
857 char *options = (char *) *data;
859 if (!options || strncmp(options, "sb=", 3) != 0)
860 return 1; /* Default location */
862 /*todo: use simple_strtoll with >32bit ext3 */
863 sb_block = simple_strtoul(options, &options, 0);
864 if (*options && *options != ',') {
865 printk("EXT3-fs: Invalid sb specification: %s\n",
871 *data = (void *) options;
875 static int parse_options (char *options, struct super_block *sb,
876 unsigned int *inum, unsigned long *journal_devnum,
877 ext3_fsblk_t *n_blocks_count, int is_remount)
879 struct ext3_sb_info *sbi = EXT3_SB(sb);
881 substring_t args[MAX_OPT_ARGS];
892 while ((p = strsep (&options, ",")) != NULL) {
897 token = match_token(p, tokens, args);
900 clear_opt (sbi->s_mount_opt, MINIX_DF);
903 set_opt (sbi->s_mount_opt, MINIX_DF);
906 set_opt (sbi->s_mount_opt, GRPID);
909 clear_opt (sbi->s_mount_opt, GRPID);
912 if (match_int(&args[0], &option))
914 sbi->s_resuid = option;
917 if (match_int(&args[0], &option))
919 sbi->s_resgid = option;
922 /* handled by get_sb_block() instead of here */
923 /* *sb_block = match_int(&args[0]); */
926 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
927 clear_opt (sbi->s_mount_opt, ERRORS_RO);
928 set_opt (sbi->s_mount_opt, ERRORS_PANIC);
931 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
932 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
933 set_opt (sbi->s_mount_opt, ERRORS_RO);
936 clear_opt (sbi->s_mount_opt, ERRORS_RO);
937 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
938 set_opt (sbi->s_mount_opt, ERRORS_CONT);
941 set_opt (sbi->s_mount_opt, NO_UID32);
944 clear_opt (sbi->s_mount_opt, CHECK);
947 set_opt (sbi->s_mount_opt, DEBUG);
950 set_opt (sbi->s_mount_opt, OLDALLOC);
953 clear_opt (sbi->s_mount_opt, OLDALLOC);
955 #ifdef CONFIG_EXT3_FS_XATTR
957 set_opt (sbi->s_mount_opt, XATTR_USER);
959 case Opt_nouser_xattr:
960 clear_opt (sbi->s_mount_opt, XATTR_USER);
964 case Opt_nouser_xattr:
965 printk("EXT3 (no)user_xattr options not supported\n");
968 #ifdef CONFIG_EXT3_FS_POSIX_ACL
970 set_opt(sbi->s_mount_opt, POSIX_ACL);
973 clear_opt(sbi->s_mount_opt, POSIX_ACL);
978 printk("EXT3 (no)acl options not supported\n");
981 case Opt_reservation:
982 set_opt(sbi->s_mount_opt, RESERVATION);
984 case Opt_noreservation:
985 clear_opt(sbi->s_mount_opt, RESERVATION);
987 case Opt_journal_update:
989 /* Eventually we will want to be able to create
990 a journal file here. For now, only allow the
991 user to specify an existing inode to be the
994 printk(KERN_ERR "EXT3-fs: cannot specify "
995 "journal on remount\n");
998 set_opt (sbi->s_mount_opt, UPDATE_JOURNAL);
1000 case Opt_journal_inum:
1002 printk(KERN_ERR "EXT3-fs: cannot specify "
1003 "journal on remount\n");
1006 if (match_int(&args[0], &option))
1010 case Opt_journal_dev:
1012 printk(KERN_ERR "EXT3-fs: cannot specify "
1013 "journal on remount\n");
1016 if (match_int(&args[0], &option))
1018 *journal_devnum = option;
1021 set_opt (sbi->s_mount_opt, NOLOAD);
1024 if (match_int(&args[0], &option))
1029 option = JBD_DEFAULT_MAX_COMMIT_AGE;
1030 sbi->s_commit_interval = HZ * option;
1032 case Opt_data_journal:
1033 data_opt = EXT3_MOUNT_JOURNAL_DATA;
1035 case Opt_data_ordered:
1036 data_opt = EXT3_MOUNT_ORDERED_DATA;
1038 case Opt_data_writeback:
1039 data_opt = EXT3_MOUNT_WRITEBACK_DATA;
1042 if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS)
1045 "EXT3-fs: cannot change data "
1046 "mode on remount\n");
1050 sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS;
1051 sbi->s_mount_opt |= data_opt;
1054 case Opt_data_err_abort:
1055 set_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1057 case Opt_data_err_ignore:
1058 clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1067 if (sb_any_quota_loaded(sb) &&
1068 !sbi->s_qf_names[qtype]) {
1070 "EXT3-fs: Cannot change journaled "
1071 "quota options when quota turned on.\n");
1074 qname = match_strdup(&args[0]);
1077 "EXT3-fs: not enough memory for "
1078 "storing quotafile name.\n");
1081 if (sbi->s_qf_names[qtype] &&
1082 strcmp(sbi->s_qf_names[qtype], qname)) {
1084 "EXT3-fs: %s quota file already "
1085 "specified.\n", QTYPE2NAME(qtype));
1089 sbi->s_qf_names[qtype] = qname;
1090 if (strchr(sbi->s_qf_names[qtype], '/')) {
1092 "EXT3-fs: quotafile must be on "
1093 "filesystem root.\n");
1094 kfree(sbi->s_qf_names[qtype]);
1095 sbi->s_qf_names[qtype] = NULL;
1098 set_opt(sbi->s_mount_opt, QUOTA);
1100 case Opt_offusrjquota:
1103 case Opt_offgrpjquota:
1106 if (sb_any_quota_loaded(sb) &&
1107 sbi->s_qf_names[qtype]) {
1108 printk(KERN_ERR "EXT3-fs: Cannot change "
1109 "journaled quota options when "
1110 "quota turned on.\n");
1114 * The space will be released later when all options
1115 * are confirmed to be correct
1117 sbi->s_qf_names[qtype] = NULL;
1119 case Opt_jqfmt_vfsold:
1120 qfmt = QFMT_VFS_OLD;
1122 case Opt_jqfmt_vfsv0:
1125 if (sb_any_quota_loaded(sb) &&
1126 sbi->s_jquota_fmt != qfmt) {
1127 printk(KERN_ERR "EXT3-fs: Cannot change "
1128 "journaled quota options when "
1129 "quota turned on.\n");
1132 sbi->s_jquota_fmt = qfmt;
1136 set_opt(sbi->s_mount_opt, QUOTA);
1137 set_opt(sbi->s_mount_opt, USRQUOTA);
1140 set_opt(sbi->s_mount_opt, QUOTA);
1141 set_opt(sbi->s_mount_opt, GRPQUOTA);
1144 if (sb_any_quota_loaded(sb)) {
1145 printk(KERN_ERR "EXT3-fs: Cannot change quota "
1146 "options when quota turned on.\n");
1149 clear_opt(sbi->s_mount_opt, QUOTA);
1150 clear_opt(sbi->s_mount_opt, USRQUOTA);
1151 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1158 "EXT3-fs: quota options not supported.\n");
1162 case Opt_offusrjquota:
1163 case Opt_offgrpjquota:
1164 case Opt_jqfmt_vfsold:
1165 case Opt_jqfmt_vfsv0:
1167 "EXT3-fs: journaled quota options not "
1174 set_opt(sbi->s_mount_opt, ABORT);
1177 if (match_int(&args[0], &option))
1180 set_opt(sbi->s_mount_opt, BARRIER);
1182 clear_opt(sbi->s_mount_opt, BARRIER);
1188 printk("EXT3-fs: resize option only available "
1192 if (match_int(&args[0], &option) != 0)
1194 *n_blocks_count = option;
1197 set_opt(sbi->s_mount_opt, NOBH);
1200 clear_opt(sbi->s_mount_opt, NOBH);
1204 "EXT3-fs: Unrecognized mount option \"%s\" "
1205 "or missing value\n", p);
1210 if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
1211 if ((sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) &&
1212 sbi->s_qf_names[USRQUOTA])
1213 clear_opt(sbi->s_mount_opt, USRQUOTA);
1215 if ((sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) &&
1216 sbi->s_qf_names[GRPQUOTA])
1217 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1219 if ((sbi->s_qf_names[USRQUOTA] &&
1220 (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)) ||
1221 (sbi->s_qf_names[GRPQUOTA] &&
1222 (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA))) {
1223 printk(KERN_ERR "EXT3-fs: old and new quota "
1224 "format mixing.\n");
1228 if (!sbi->s_jquota_fmt) {
1229 printk(KERN_ERR "EXT3-fs: journaled quota format "
1230 "not specified.\n");
1234 if (sbi->s_jquota_fmt) {
1235 printk(KERN_ERR "EXT3-fs: journaled quota format "
1236 "specified with no journaling "
1245 static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es,
1248 struct ext3_sb_info *sbi = EXT3_SB(sb);
1251 if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) {
1252 printk (KERN_ERR "EXT3-fs warning: revision level too high, "
1253 "forcing read-only mode\n");
1258 if (!(sbi->s_mount_state & EXT3_VALID_FS))
1259 printk (KERN_WARNING "EXT3-fs warning: mounting unchecked fs, "
1260 "running e2fsck is recommended\n");
1261 else if ((sbi->s_mount_state & EXT3_ERROR_FS))
1262 printk (KERN_WARNING
1263 "EXT3-fs warning: mounting fs with errors, "
1264 "running e2fsck is recommended\n");
1265 else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 &&
1266 le16_to_cpu(es->s_mnt_count) >=
1267 (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))
1268 printk (KERN_WARNING
1269 "EXT3-fs warning: maximal mount count reached, "
1270 "running e2fsck is recommended\n");
1271 else if (le32_to_cpu(es->s_checkinterval) &&
1272 (le32_to_cpu(es->s_lastcheck) +
1273 le32_to_cpu(es->s_checkinterval) <= get_seconds()))
1274 printk (KERN_WARNING
1275 "EXT3-fs warning: checktime reached, "
1276 "running e2fsck is recommended\n");
1278 /* @@@ We _will_ want to clear the valid bit if we find
1279 inconsistencies, to force a fsck at reboot. But for
1280 a plain journaled filesystem we can keep it set as
1281 valid forever! :) */
1282 es->s_state &= cpu_to_le16(~EXT3_VALID_FS);
1284 if (!(__s16) le16_to_cpu(es->s_max_mnt_count))
1285 es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT);
1286 le16_add_cpu(&es->s_mnt_count, 1);
1287 es->s_mtime = cpu_to_le32(get_seconds());
1288 ext3_update_dynamic_rev(sb);
1289 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
1291 ext3_commit_super(sb, es, 1);
1292 if (test_opt(sb, DEBUG))
1293 printk(KERN_INFO "[EXT3 FS bs=%lu, gc=%lu, "
1294 "bpg=%lu, ipg=%lu, mo=%04lx]\n",
1296 sbi->s_groups_count,
1297 EXT3_BLOCKS_PER_GROUP(sb),
1298 EXT3_INODES_PER_GROUP(sb),
1301 printk(KERN_INFO "EXT3 FS on %s, ", sb->s_id);
1302 if (EXT3_SB(sb)->s_journal->j_inode == NULL) {
1303 char b[BDEVNAME_SIZE];
1305 printk("external journal on %s\n",
1306 bdevname(EXT3_SB(sb)->s_journal->j_dev, b));
1308 printk("internal journal\n");
1313 /* Called at mount-time, super-block is locked */
1314 static int ext3_check_descriptors(struct super_block *sb)
1316 struct ext3_sb_info *sbi = EXT3_SB(sb);
1319 ext3_debug ("Checking group descriptors");
1321 for (i = 0; i < sbi->s_groups_count; i++) {
1322 struct ext3_group_desc *gdp = ext3_get_group_desc(sb, i, NULL);
1323 ext3_fsblk_t first_block = ext3_group_first_block_no(sb, i);
1324 ext3_fsblk_t last_block;
1326 if (i == sbi->s_groups_count - 1)
1327 last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
1329 last_block = first_block +
1330 (EXT3_BLOCKS_PER_GROUP(sb) - 1);
1332 if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
1333 le32_to_cpu(gdp->bg_block_bitmap) > last_block)
1335 ext3_error (sb, "ext3_check_descriptors",
1336 "Block bitmap for group %d"
1337 " not in group (block %lu)!",
1339 le32_to_cpu(gdp->bg_block_bitmap));
1342 if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block ||
1343 le32_to_cpu(gdp->bg_inode_bitmap) > last_block)
1345 ext3_error (sb, "ext3_check_descriptors",
1346 "Inode bitmap for group %d"
1347 " not in group (block %lu)!",
1349 le32_to_cpu(gdp->bg_inode_bitmap));
1352 if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
1353 le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 >
1356 ext3_error (sb, "ext3_check_descriptors",
1357 "Inode table for group %d"
1358 " not in group (block %lu)!",
1360 le32_to_cpu(gdp->bg_inode_table));
1365 sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb));
1366 sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb));
1371 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1372 * the superblock) which were deleted from all directories, but held open by
1373 * a process at the time of a crash. We walk the list and try to delete these
1374 * inodes at recovery time (only with a read-write filesystem).
1376 * In order to keep the orphan inode chain consistent during traversal (in
1377 * case of crash during recovery), we link each inode into the superblock
1378 * orphan list_head and handle it the same way as an inode deletion during
1379 * normal operation (which journals the operations for us).
1381 * We only do an iget() and an iput() on each inode, which is very safe if we
1382 * accidentally point at an in-use or already deleted inode. The worst that
1383 * can happen in this case is that we get a "bit already cleared" message from
1384 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1385 * e2fsck was run on this filesystem, and it must have already done the orphan
1386 * inode cleanup for us, so we can safely abort without any further action.
1388 static void ext3_orphan_cleanup (struct super_block * sb,
1389 struct ext3_super_block * es)
1391 unsigned int s_flags = sb->s_flags;
1392 int nr_orphans = 0, nr_truncates = 0;
1396 if (!es->s_last_orphan) {
1397 jbd_debug(4, "no orphan inodes to clean up\n");
1401 if (bdev_read_only(sb->s_bdev)) {
1402 printk(KERN_ERR "EXT3-fs: write access "
1403 "unavailable, skipping orphan cleanup.\n");
1407 if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) {
1408 if (es->s_last_orphan)
1409 jbd_debug(1, "Errors on filesystem, "
1410 "clearing orphan list.\n");
1411 es->s_last_orphan = 0;
1412 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1416 if (s_flags & MS_RDONLY) {
1417 printk(KERN_INFO "EXT3-fs: %s: orphan cleanup on readonly fs\n",
1419 sb->s_flags &= ~MS_RDONLY;
1422 /* Needed for iput() to work correctly and not trash data */
1423 sb->s_flags |= MS_ACTIVE;
1424 /* Turn on quotas so that they are updated correctly */
1425 for (i = 0; i < MAXQUOTAS; i++) {
1426 if (EXT3_SB(sb)->s_qf_names[i]) {
1427 int ret = ext3_quota_on_mount(sb, i);
1430 "EXT3-fs: Cannot turn on journaled "
1431 "quota: error %d\n", ret);
1436 while (es->s_last_orphan) {
1437 struct inode *inode;
1439 inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan));
1440 if (IS_ERR(inode)) {
1441 es->s_last_orphan = 0;
1445 list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan);
1447 if (inode->i_nlink) {
1449 "%s: truncating inode %lu to %Ld bytes\n",
1450 __func__, inode->i_ino, inode->i_size);
1451 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1452 inode->i_ino, inode->i_size);
1453 ext3_truncate(inode);
1457 "%s: deleting unreferenced inode %lu\n",
1458 __func__, inode->i_ino);
1459 jbd_debug(2, "deleting unreferenced inode %lu\n",
1463 iput(inode); /* The delete magic happens here! */
1466 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1469 printk(KERN_INFO "EXT3-fs: %s: %d orphan inode%s deleted\n",
1470 sb->s_id, PLURAL(nr_orphans));
1472 printk(KERN_INFO "EXT3-fs: %s: %d truncate%s cleaned up\n",
1473 sb->s_id, PLURAL(nr_truncates));
1475 /* Turn quotas off */
1476 for (i = 0; i < MAXQUOTAS; i++) {
1477 if (sb_dqopt(sb)->files[i])
1478 vfs_quota_off(sb, i, 0);
1481 sb->s_flags = s_flags; /* Restore MS_RDONLY status */
1485 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1486 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1487 * We need to be 1 filesystem block less than the 2^32 sector limit.
1489 static loff_t ext3_max_size(int bits)
1491 loff_t res = EXT3_NDIR_BLOCKS;
1495 /* This is calculated to be the largest file size for a
1496 * dense, file such that the total number of
1497 * sectors in the file, including data and all indirect blocks,
1498 * does not exceed 2^32 -1
1499 * __u32 i_blocks representing the total number of
1500 * 512 bytes blocks of the file
1502 upper_limit = (1LL << 32) - 1;
1504 /* total blocks in file system block size */
1505 upper_limit >>= (bits - 9);
1508 /* indirect blocks */
1510 /* double indirect blocks */
1511 meta_blocks += 1 + (1LL << (bits-2));
1512 /* tripple indirect blocks */
1513 meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
1515 upper_limit -= meta_blocks;
1516 upper_limit <<= bits;
1518 res += 1LL << (bits-2);
1519 res += 1LL << (2*(bits-2));
1520 res += 1LL << (3*(bits-2));
1522 if (res > upper_limit)
1525 if (res > MAX_LFS_FILESIZE)
1526 res = MAX_LFS_FILESIZE;
1531 static ext3_fsblk_t descriptor_loc(struct super_block *sb,
1532 ext3_fsblk_t logic_sb_block,
1535 struct ext3_sb_info *sbi = EXT3_SB(sb);
1536 unsigned long bg, first_meta_bg;
1539 first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
1541 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) ||
1543 return (logic_sb_block + nr + 1);
1544 bg = sbi->s_desc_per_block * nr;
1545 if (ext3_bg_has_super(sb, bg))
1547 return (has_super + ext3_group_first_block_no(sb, bg));
1551 static int ext3_fill_super (struct super_block *sb, void *data, int silent)
1553 struct buffer_head * bh;
1554 struct ext3_super_block *es = NULL;
1555 struct ext3_sb_info *sbi;
1557 ext3_fsblk_t sb_block = get_sb_block(&data);
1558 ext3_fsblk_t logic_sb_block;
1559 unsigned long offset = 0;
1560 unsigned int journal_inum = 0;
1561 unsigned long journal_devnum = 0;
1562 unsigned long def_mount_opts;
1573 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
1577 sbi->s_blockgroup_lock =
1578 kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
1579 if (!sbi->s_blockgroup_lock) {
1583 sb->s_fs_info = sbi;
1584 sbi->s_mount_opt = 0;
1585 sbi->s_resuid = EXT3_DEF_RESUID;
1586 sbi->s_resgid = EXT3_DEF_RESGID;
1587 sbi->s_sb_block = sb_block;
1591 blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE);
1593 printk(KERN_ERR "EXT3-fs: unable to set blocksize\n");
1598 * The ext3 superblock will not be buffer aligned for other than 1kB
1599 * block sizes. We need to calculate the offset from buffer start.
1601 if (blocksize != EXT3_MIN_BLOCK_SIZE) {
1602 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1603 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1605 logic_sb_block = sb_block;
1608 if (!(bh = sb_bread(sb, logic_sb_block))) {
1609 printk (KERN_ERR "EXT3-fs: unable to read superblock\n");
1613 * Note: s_es must be initialized as soon as possible because
1614 * some ext3 macro-instructions depend on its value
1616 es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
1618 sb->s_magic = le16_to_cpu(es->s_magic);
1619 if (sb->s_magic != EXT3_SUPER_MAGIC)
1622 /* Set defaults before we parse the mount options */
1623 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
1624 if (def_mount_opts & EXT3_DEFM_DEBUG)
1625 set_opt(sbi->s_mount_opt, DEBUG);
1626 if (def_mount_opts & EXT3_DEFM_BSDGROUPS)
1627 set_opt(sbi->s_mount_opt, GRPID);
1628 if (def_mount_opts & EXT3_DEFM_UID16)
1629 set_opt(sbi->s_mount_opt, NO_UID32);
1630 #ifdef CONFIG_EXT3_FS_XATTR
1631 if (def_mount_opts & EXT3_DEFM_XATTR_USER)
1632 set_opt(sbi->s_mount_opt, XATTR_USER);
1634 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1635 if (def_mount_opts & EXT3_DEFM_ACL)
1636 set_opt(sbi->s_mount_opt, POSIX_ACL);
1638 if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA)
1639 sbi->s_mount_opt |= EXT3_MOUNT_JOURNAL_DATA;
1640 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED)
1641 sbi->s_mount_opt |= EXT3_MOUNT_ORDERED_DATA;
1642 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK)
1643 sbi->s_mount_opt |= EXT3_MOUNT_WRITEBACK_DATA;
1645 if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC)
1646 set_opt(sbi->s_mount_opt, ERRORS_PANIC);
1647 else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_CONTINUE)
1648 set_opt(sbi->s_mount_opt, ERRORS_CONT);
1650 set_opt(sbi->s_mount_opt, ERRORS_RO);
1652 sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
1653 sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
1655 set_opt(sbi->s_mount_opt, RESERVATION);
1657 if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
1661 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1662 ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1664 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV &&
1665 (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) ||
1666 EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
1667 EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U)))
1669 "EXT3-fs warning: feature flags set on rev 0 fs, "
1670 "running e2fsck is recommended\n");
1672 * Check feature flags regardless of the revision level, since we
1673 * previously didn't change the revision level when setting the flags,
1674 * so there is a chance incompat flags are set on a rev 0 filesystem.
1676 features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP);
1678 printk(KERN_ERR "EXT3-fs: %s: couldn't mount because of "
1679 "unsupported optional features (%x).\n",
1680 sb->s_id, le32_to_cpu(features));
1683 features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP);
1684 if (!(sb->s_flags & MS_RDONLY) && features) {
1685 printk(KERN_ERR "EXT3-fs: %s: couldn't mount RDWR because of "
1686 "unsupported optional features (%x).\n",
1687 sb->s_id, le32_to_cpu(features));
1690 blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
1692 if (blocksize < EXT3_MIN_BLOCK_SIZE ||
1693 blocksize > EXT3_MAX_BLOCK_SIZE) {
1695 "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n",
1696 blocksize, sb->s_id);
1700 hblock = bdev_logical_block_size(sb->s_bdev);
1701 if (sb->s_blocksize != blocksize) {
1703 * Make sure the blocksize for the filesystem is larger
1704 * than the hardware sectorsize for the machine.
1706 if (blocksize < hblock) {
1707 printk(KERN_ERR "EXT3-fs: blocksize %d too small for "
1708 "device blocksize %d.\n", blocksize, hblock);
1713 if (!sb_set_blocksize(sb, blocksize)) {
1714 printk(KERN_ERR "EXT3-fs: bad blocksize %d.\n",
1718 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1719 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1720 bh = sb_bread(sb, logic_sb_block);
1723 "EXT3-fs: Can't read superblock on 2nd try.\n");
1726 es = (struct ext3_super_block *)(((char *)bh->b_data) + offset);
1728 if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) {
1730 "EXT3-fs: Magic mismatch, very weird !\n");
1735 sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits);
1737 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) {
1738 sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE;
1739 sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO;
1741 sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
1742 sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
1743 if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) ||
1744 (!is_power_of_2(sbi->s_inode_size)) ||
1745 (sbi->s_inode_size > blocksize)) {
1747 "EXT3-fs: unsupported inode size: %d\n",
1752 sbi->s_frag_size = EXT3_MIN_FRAG_SIZE <<
1753 le32_to_cpu(es->s_log_frag_size);
1754 if (blocksize != sbi->s_frag_size) {
1756 "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n",
1757 sbi->s_frag_size, blocksize);
1760 sbi->s_frags_per_block = 1;
1761 sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
1762 sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
1763 sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
1764 if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0)
1766 sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb);
1767 if (sbi->s_inodes_per_block == 0)
1769 sbi->s_itb_per_group = sbi->s_inodes_per_group /
1770 sbi->s_inodes_per_block;
1771 sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc);
1773 sbi->s_mount_state = le16_to_cpu(es->s_state);
1774 sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb));
1775 sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb));
1776 for (i=0; i < 4; i++)
1777 sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
1778 sbi->s_def_hash_version = es->s_def_hash_version;
1779 i = le32_to_cpu(es->s_flags);
1780 if (i & EXT2_FLAGS_UNSIGNED_HASH)
1781 sbi->s_hash_unsigned = 3;
1782 else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) {
1783 #ifdef __CHAR_UNSIGNED__
1784 es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH);
1785 sbi->s_hash_unsigned = 3;
1787 es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH);
1791 if (sbi->s_blocks_per_group > blocksize * 8) {
1793 "EXT3-fs: #blocks per group too big: %lu\n",
1794 sbi->s_blocks_per_group);
1797 if (sbi->s_frags_per_group > blocksize * 8) {
1799 "EXT3-fs: #fragments per group too big: %lu\n",
1800 sbi->s_frags_per_group);
1803 if (sbi->s_inodes_per_group > blocksize * 8) {
1805 "EXT3-fs: #inodes per group too big: %lu\n",
1806 sbi->s_inodes_per_group);
1810 if (le32_to_cpu(es->s_blocks_count) >
1811 (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) {
1812 printk(KERN_ERR "EXT3-fs: filesystem on %s:"
1813 " too large to mount safely\n", sb->s_id);
1814 if (sizeof(sector_t) < 8)
1815 printk(KERN_WARNING "EXT3-fs: CONFIG_LBD not "
1820 if (EXT3_BLOCKS_PER_GROUP(sb) == 0)
1822 sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
1823 le32_to_cpu(es->s_first_data_block) - 1)
1824 / EXT3_BLOCKS_PER_GROUP(sb)) + 1;
1825 db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) /
1826 EXT3_DESC_PER_BLOCK(sb);
1827 sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
1829 if (sbi->s_group_desc == NULL) {
1830 printk (KERN_ERR "EXT3-fs: not enough memory\n");
1834 bgl_lock_init(sbi->s_blockgroup_lock);
1836 for (i = 0; i < db_count; i++) {
1837 block = descriptor_loc(sb, logic_sb_block, i);
1838 sbi->s_group_desc[i] = sb_bread(sb, block);
1839 if (!sbi->s_group_desc[i]) {
1840 printk (KERN_ERR "EXT3-fs: "
1841 "can't read group descriptor %d\n", i);
1846 if (!ext3_check_descriptors (sb)) {
1847 printk(KERN_ERR "EXT3-fs: group descriptors corrupted!\n");
1850 sbi->s_gdb_count = db_count;
1851 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1852 spin_lock_init(&sbi->s_next_gen_lock);
1854 err = percpu_counter_init(&sbi->s_freeblocks_counter,
1855 ext3_count_free_blocks(sb));
1857 err = percpu_counter_init(&sbi->s_freeinodes_counter,
1858 ext3_count_free_inodes(sb));
1861 err = percpu_counter_init(&sbi->s_dirs_counter,
1862 ext3_count_dirs(sb));
1865 printk(KERN_ERR "EXT3-fs: insufficient memory\n");
1869 /* per fileystem reservation list head & lock */
1870 spin_lock_init(&sbi->s_rsv_window_lock);
1871 sbi->s_rsv_window_root = RB_ROOT;
1872 /* Add a single, static dummy reservation to the start of the
1873 * reservation window list --- it gives us a placeholder for
1874 * append-at-start-of-list which makes the allocation logic
1875 * _much_ simpler. */
1876 sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1877 sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1878 sbi->s_rsv_window_head.rsv_alloc_hit = 0;
1879 sbi->s_rsv_window_head.rsv_goal_size = 0;
1880 ext3_rsv_window_add(sb, &sbi->s_rsv_window_head);
1883 * set up enough so that it can read an inode
1885 sb->s_op = &ext3_sops;
1886 sb->s_export_op = &ext3_export_ops;
1887 sb->s_xattr = ext3_xattr_handlers;
1889 sb->s_qcop = &ext3_qctl_operations;
1890 sb->dq_op = &ext3_quota_operations;
1892 INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
1896 needs_recovery = (es->s_last_orphan != 0 ||
1897 EXT3_HAS_INCOMPAT_FEATURE(sb,
1898 EXT3_FEATURE_INCOMPAT_RECOVER));
1901 * The first inode we look at is the journal inode. Don't try
1902 * root first: it may be modified in the journal!
1904 if (!test_opt(sb, NOLOAD) &&
1905 EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1906 if (ext3_load_journal(sb, es, journal_devnum))
1908 } else if (journal_inum) {
1909 if (ext3_create_journal(sb, es, journal_inum))
1914 "ext3: No journal on filesystem on %s\n",
1919 /* We have now updated the journal if required, so we can
1920 * validate the data journaling mode. */
1921 switch (test_opt(sb, DATA_FLAGS)) {
1923 /* No mode set, assume a default based on the journal
1924 capabilities: ORDERED_DATA if the journal can
1925 cope, else JOURNAL_DATA */
1926 if (journal_check_available_features
1927 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE))
1928 set_opt(sbi->s_mount_opt, DEFAULT_DATA_MODE);
1930 set_opt(sbi->s_mount_opt, JOURNAL_DATA);
1933 case EXT3_MOUNT_ORDERED_DATA:
1934 case EXT3_MOUNT_WRITEBACK_DATA:
1935 if (!journal_check_available_features
1936 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) {
1937 printk(KERN_ERR "EXT3-fs: Journal does not support "
1938 "requested data journaling mode\n");
1945 if (test_opt(sb, NOBH)) {
1946 if (!(test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)) {
1947 printk(KERN_WARNING "EXT3-fs: Ignoring nobh option - "
1948 "its supported only with writeback mode\n");
1949 clear_opt(sbi->s_mount_opt, NOBH);
1953 * The journal_load will have done any necessary log recovery,
1954 * so we can safely mount the rest of the filesystem now.
1957 root = ext3_iget(sb, EXT3_ROOT_INO);
1959 printk(KERN_ERR "EXT3-fs: get root inode failed\n");
1960 ret = PTR_ERR(root);
1963 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
1965 printk(KERN_ERR "EXT3-fs: corrupt root inode, run e2fsck\n");
1968 sb->s_root = d_alloc_root(root);
1970 printk(KERN_ERR "EXT3-fs: get root dentry failed\n");
1976 ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
1978 * akpm: core read_super() calls in here with the superblock locked.
1979 * That deadlocks, because orphan cleanup needs to lock the superblock
1980 * in numerous places. Here we just pop the lock - it's relatively
1981 * harmless, because we are now ready to accept write_super() requests,
1982 * and aviro says that's the only reason for hanging onto the
1985 EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS;
1986 ext3_orphan_cleanup(sb, es);
1987 EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS;
1989 printk (KERN_INFO "EXT3-fs: recovery complete.\n");
1990 ext3_mark_recovery_complete(sb, es);
1991 printk (KERN_INFO "EXT3-fs: mounted filesystem with %s data mode.\n",
1992 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal":
1993 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered":
2001 printk(KERN_ERR "VFS: Can't find ext3 filesystem on dev %s.\n",
2006 journal_destroy(sbi->s_journal);
2008 percpu_counter_destroy(&sbi->s_freeblocks_counter);
2009 percpu_counter_destroy(&sbi->s_freeinodes_counter);
2010 percpu_counter_destroy(&sbi->s_dirs_counter);
2012 for (i = 0; i < db_count; i++)
2013 brelse(sbi->s_group_desc[i]);
2014 kfree(sbi->s_group_desc);
2017 for (i = 0; i < MAXQUOTAS; i++)
2018 kfree(sbi->s_qf_names[i]);
2020 ext3_blkdev_remove(sbi);
2023 sb->s_fs_info = NULL;
2024 kfree(sbi->s_blockgroup_lock);
2031 * Setup any per-fs journal parameters now. We'll do this both on
2032 * initial mount, once the journal has been initialised but before we've
2033 * done any recovery; and again on any subsequent remount.
2035 static void ext3_init_journal_params(struct super_block *sb, journal_t *journal)
2037 struct ext3_sb_info *sbi = EXT3_SB(sb);
2039 if (sbi->s_commit_interval)
2040 journal->j_commit_interval = sbi->s_commit_interval;
2041 /* We could also set up an ext3-specific default for the commit
2042 * interval here, but for now we'll just fall back to the jbd
2045 spin_lock(&journal->j_state_lock);
2046 if (test_opt(sb, BARRIER))
2047 journal->j_flags |= JFS_BARRIER;
2049 journal->j_flags &= ~JFS_BARRIER;
2050 if (test_opt(sb, DATA_ERR_ABORT))
2051 journal->j_flags |= JFS_ABORT_ON_SYNCDATA_ERR;
2053 journal->j_flags &= ~JFS_ABORT_ON_SYNCDATA_ERR;
2054 spin_unlock(&journal->j_state_lock);
2057 static journal_t *ext3_get_journal(struct super_block *sb,
2058 unsigned int journal_inum)
2060 struct inode *journal_inode;
2063 /* First, test for the existence of a valid inode on disk. Bad
2064 * things happen if we iget() an unused inode, as the subsequent
2065 * iput() will try to delete it. */
2067 journal_inode = ext3_iget(sb, journal_inum);
2068 if (IS_ERR(journal_inode)) {
2069 printk(KERN_ERR "EXT3-fs: no journal found.\n");
2072 if (!journal_inode->i_nlink) {
2073 make_bad_inode(journal_inode);
2074 iput(journal_inode);
2075 printk(KERN_ERR "EXT3-fs: journal inode is deleted.\n");
2079 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2080 journal_inode, journal_inode->i_size);
2081 if (!S_ISREG(journal_inode->i_mode)) {
2082 printk(KERN_ERR "EXT3-fs: invalid journal inode.\n");
2083 iput(journal_inode);
2087 journal = journal_init_inode(journal_inode);
2089 printk(KERN_ERR "EXT3-fs: Could not load journal inode\n");
2090 iput(journal_inode);
2093 journal->j_private = sb;
2094 ext3_init_journal_params(sb, journal);
2098 static journal_t *ext3_get_dev_journal(struct super_block *sb,
2101 struct buffer_head * bh;
2105 int hblock, blocksize;
2106 ext3_fsblk_t sb_block;
2107 unsigned long offset;
2108 struct ext3_super_block * es;
2109 struct block_device *bdev;
2111 bdev = ext3_blkdev_get(j_dev);
2115 if (bd_claim(bdev, sb)) {
2117 "EXT3: failed to claim external journal device.\n");
2118 blkdev_put(bdev, FMODE_READ|FMODE_WRITE);
2122 blocksize = sb->s_blocksize;
2123 hblock = bdev_logical_block_size(bdev);
2124 if (blocksize < hblock) {
2126 "EXT3-fs: blocksize too small for journal device.\n");
2130 sb_block = EXT3_MIN_BLOCK_SIZE / blocksize;
2131 offset = EXT3_MIN_BLOCK_SIZE % blocksize;
2132 set_blocksize(bdev, blocksize);
2133 if (!(bh = __bread(bdev, sb_block, blocksize))) {
2134 printk(KERN_ERR "EXT3-fs: couldn't read superblock of "
2135 "external journal\n");
2139 es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
2140 if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) ||
2141 !(le32_to_cpu(es->s_feature_incompat) &
2142 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
2143 printk(KERN_ERR "EXT3-fs: external journal has "
2144 "bad superblock\n");
2149 if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
2150 printk(KERN_ERR "EXT3-fs: journal UUID does not match\n");
2155 len = le32_to_cpu(es->s_blocks_count);
2156 start = sb_block + 1;
2157 brelse(bh); /* we're done with the superblock */
2159 journal = journal_init_dev(bdev, sb->s_bdev,
2160 start, len, blocksize);
2162 printk(KERN_ERR "EXT3-fs: failed to create device journal\n");
2165 journal->j_private = sb;
2166 ll_rw_block(READ, 1, &journal->j_sb_buffer);
2167 wait_on_buffer(journal->j_sb_buffer);
2168 if (!buffer_uptodate(journal->j_sb_buffer)) {
2169 printk(KERN_ERR "EXT3-fs: I/O error on journal device\n");
2172 if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {
2173 printk(KERN_ERR "EXT3-fs: External journal has more than one "
2174 "user (unsupported) - %d\n",
2175 be32_to_cpu(journal->j_superblock->s_nr_users));
2178 EXT3_SB(sb)->journal_bdev = bdev;
2179 ext3_init_journal_params(sb, journal);
2182 journal_destroy(journal);
2184 ext3_blkdev_put(bdev);
2188 static int ext3_load_journal(struct super_block *sb,
2189 struct ext3_super_block *es,
2190 unsigned long journal_devnum)
2193 unsigned int journal_inum = le32_to_cpu(es->s_journal_inum);
2196 int really_read_only;
2198 if (journal_devnum &&
2199 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2200 printk(KERN_INFO "EXT3-fs: external journal device major/minor "
2201 "numbers have changed\n");
2202 journal_dev = new_decode_dev(journal_devnum);
2204 journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));
2206 really_read_only = bdev_read_only(sb->s_bdev);
2209 * Are we loading a blank journal or performing recovery after a
2210 * crash? For recovery, we need to check in advance whether we
2211 * can get read-write access to the device.
2214 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) {
2215 if (sb->s_flags & MS_RDONLY) {
2216 printk(KERN_INFO "EXT3-fs: INFO: recovery "
2217 "required on readonly filesystem.\n");
2218 if (really_read_only) {
2219 printk(KERN_ERR "EXT3-fs: write access "
2220 "unavailable, cannot proceed.\n");
2223 printk (KERN_INFO "EXT3-fs: write access will "
2224 "be enabled during recovery.\n");
2228 if (journal_inum && journal_dev) {
2229 printk(KERN_ERR "EXT3-fs: filesystem has both journal "
2230 "and inode journals!\n");
2235 if (!(journal = ext3_get_journal(sb, journal_inum)))
2238 if (!(journal = ext3_get_dev_journal(sb, journal_dev)))
2242 if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) {
2243 err = journal_update_format(journal);
2245 printk(KERN_ERR "EXT3-fs: error updating journal.\n");
2246 journal_destroy(journal);
2251 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER))
2252 err = journal_wipe(journal, !really_read_only);
2254 err = journal_load(journal);
2257 printk(KERN_ERR "EXT3-fs: error loading journal.\n");
2258 journal_destroy(journal);
2262 EXT3_SB(sb)->s_journal = journal;
2263 ext3_clear_journal_err(sb, es);
2265 if (journal_devnum &&
2266 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2267 es->s_journal_dev = cpu_to_le32(journal_devnum);
2269 /* Make sure we flush the recovery flag to disk. */
2270 ext3_commit_super(sb, es, 1);
2276 static int ext3_create_journal(struct super_block * sb,
2277 struct ext3_super_block * es,
2278 unsigned int journal_inum)
2283 if (sb->s_flags & MS_RDONLY) {
2284 printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to "
2285 "create journal.\n");
2289 journal = ext3_get_journal(sb, journal_inum);
2293 printk(KERN_INFO "EXT3-fs: creating new journal on inode %u\n",
2296 err = journal_create(journal);
2298 printk(KERN_ERR "EXT3-fs: error creating journal.\n");
2299 journal_destroy(journal);
2303 EXT3_SB(sb)->s_journal = journal;
2305 ext3_update_dynamic_rev(sb);
2306 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2307 EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL);
2309 es->s_journal_inum = cpu_to_le32(journal_inum);
2311 /* Make sure we flush the recovery flag to disk. */
2312 ext3_commit_super(sb, es, 1);
2317 static int ext3_commit_super(struct super_block *sb,
2318 struct ext3_super_block *es,
2321 struct buffer_head *sbh = EXT3_SB(sb)->s_sbh;
2326 es->s_wtime = cpu_to_le32(get_seconds());
2327 es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb));
2328 es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb));
2329 BUFFER_TRACE(sbh, "marking dirty");
2330 mark_buffer_dirty(sbh);
2332 error = sync_dirty_buffer(sbh);
2338 * Have we just finished recovery? If so, and if we are mounting (or
2339 * remounting) the filesystem readonly, then we will end up with a
2340 * consistent fs on disk. Record that fact.
2342 static void ext3_mark_recovery_complete(struct super_block * sb,
2343 struct ext3_super_block * es)
2345 journal_t *journal = EXT3_SB(sb)->s_journal;
2347 journal_lock_updates(journal);
2348 if (journal_flush(journal) < 0)
2352 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) &&
2353 sb->s_flags & MS_RDONLY) {
2354 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2355 ext3_commit_super(sb, es, 1);
2360 journal_unlock_updates(journal);
2364 * If we are mounting (or read-write remounting) a filesystem whose journal
2365 * has recorded an error from a previous lifetime, move that error to the
2366 * main filesystem now.
2368 static void ext3_clear_journal_err(struct super_block * sb,
2369 struct ext3_super_block * es)
2375 journal = EXT3_SB(sb)->s_journal;
2378 * Now check for any error status which may have been recorded in the
2379 * journal by a prior ext3_error() or ext3_abort()
2382 j_errno = journal_errno(journal);
2386 errstr = ext3_decode_error(sb, j_errno, nbuf);
2387 ext3_warning(sb, __func__, "Filesystem error recorded "
2388 "from previous mount: %s", errstr);
2389 ext3_warning(sb, __func__, "Marking fs in need of "
2390 "filesystem check.");
2392 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
2393 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
2394 ext3_commit_super (sb, es, 1);
2396 journal_clear_err(journal);
2401 * Force the running and committing transactions to commit,
2402 * and wait on the commit.
2404 int ext3_force_commit(struct super_block *sb)
2409 if (sb->s_flags & MS_RDONLY)
2412 journal = EXT3_SB(sb)->s_journal;
2413 ret = ext3_journal_force_commit(journal);
2417 static int ext3_sync_fs(struct super_block *sb, int wait)
2421 if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) {
2423 log_wait_commit(EXT3_SB(sb)->s_journal, target);
2429 * LVM calls this function before a (read-only) snapshot is created. This
2430 * gives us a chance to flush the journal completely and mark the fs clean.
2432 static int ext3_freeze(struct super_block *sb)
2437 if (!(sb->s_flags & MS_RDONLY)) {
2438 journal = EXT3_SB(sb)->s_journal;
2440 /* Now we set up the journal barrier. */
2441 journal_lock_updates(journal);
2444 * We don't want to clear needs_recovery flag when we failed
2445 * to flush the journal.
2447 error = journal_flush(journal);
2451 /* Journal blocked and flushed, clear needs_recovery flag. */
2452 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2453 error = ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2460 journal_unlock_updates(journal);
2465 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2466 * flag here, even though the filesystem is not technically dirty yet.
2468 static int ext3_unfreeze(struct super_block *sb)
2470 if (!(sb->s_flags & MS_RDONLY)) {
2472 /* Reser the needs_recovery flag before the fs is unlocked. */
2473 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2474 ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2476 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2481 static int ext3_remount (struct super_block * sb, int * flags, char * data)
2483 struct ext3_super_block * es;
2484 struct ext3_sb_info *sbi = EXT3_SB(sb);
2485 ext3_fsblk_t n_blocks_count = 0;
2486 unsigned long old_sb_flags;
2487 struct ext3_mount_options old_opts;
2495 /* Store the original options */
2497 old_sb_flags = sb->s_flags;
2498 old_opts.s_mount_opt = sbi->s_mount_opt;
2499 old_opts.s_resuid = sbi->s_resuid;
2500 old_opts.s_resgid = sbi->s_resgid;
2501 old_opts.s_commit_interval = sbi->s_commit_interval;
2503 old_opts.s_jquota_fmt = sbi->s_jquota_fmt;
2504 for (i = 0; i < MAXQUOTAS; i++)
2505 old_opts.s_qf_names[i] = sbi->s_qf_names[i];
2509 * Allow the "check" option to be passed as a remount option.
2511 if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) {
2516 if (sbi->s_mount_opt & EXT3_MOUNT_ABORT)
2517 ext3_abort(sb, __func__, "Abort forced by user");
2519 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
2520 ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
2524 ext3_init_journal_params(sb, sbi->s_journal);
2526 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) ||
2527 n_blocks_count > le32_to_cpu(es->s_blocks_count)) {
2528 if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) {
2533 if (*flags & MS_RDONLY) {
2535 * First of all, the unconditional stuff we have to do
2536 * to disable replay of the journal when we next remount
2538 sb->s_flags |= MS_RDONLY;
2541 * OK, test if we are remounting a valid rw partition
2542 * readonly, and if so set the rdonly flag and then
2543 * mark the partition as valid again.
2545 if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) &&
2546 (sbi->s_mount_state & EXT3_VALID_FS))
2547 es->s_state = cpu_to_le16(sbi->s_mount_state);
2550 * We have to unlock super so that we can wait for
2554 ext3_mark_recovery_complete(sb, es);
2558 if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb,
2559 ~EXT3_FEATURE_RO_COMPAT_SUPP))) {
2560 printk(KERN_WARNING "EXT3-fs: %s: couldn't "
2561 "remount RDWR because of unsupported "
2562 "optional features (%x).\n",
2563 sb->s_id, le32_to_cpu(ret));
2569 * If we have an unprocessed orphan list hanging
2570 * around from a previously readonly bdev mount,
2571 * require a full umount/remount for now.
2573 if (es->s_last_orphan) {
2574 printk(KERN_WARNING "EXT3-fs: %s: couldn't "
2575 "remount RDWR because of unprocessed "
2576 "orphan inode list. Please "
2577 "umount/remount instead.\n",
2584 * Mounting a RDONLY partition read-write, so reread
2585 * and store the current valid flag. (It may have
2586 * been changed by e2fsck since we originally mounted
2589 ext3_clear_journal_err(sb, es);
2590 sbi->s_mount_state = le16_to_cpu(es->s_state);
2591 if ((err = ext3_group_extend(sb, es, n_blocks_count)))
2593 if (!ext3_setup_super (sb, es, 0))
2594 sb->s_flags &= ~MS_RDONLY;
2598 /* Release old quota file names */
2599 for (i = 0; i < MAXQUOTAS; i++)
2600 if (old_opts.s_qf_names[i] &&
2601 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2602 kfree(old_opts.s_qf_names[i]);
2608 sb->s_flags = old_sb_flags;
2609 sbi->s_mount_opt = old_opts.s_mount_opt;
2610 sbi->s_resuid = old_opts.s_resuid;
2611 sbi->s_resgid = old_opts.s_resgid;
2612 sbi->s_commit_interval = old_opts.s_commit_interval;
2614 sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
2615 for (i = 0; i < MAXQUOTAS; i++) {
2616 if (sbi->s_qf_names[i] &&
2617 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2618 kfree(sbi->s_qf_names[i]);
2619 sbi->s_qf_names[i] = old_opts.s_qf_names[i];
2627 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
2629 struct super_block *sb = dentry->d_sb;
2630 struct ext3_sb_info *sbi = EXT3_SB(sb);
2631 struct ext3_super_block *es = sbi->s_es;
2634 if (test_opt(sb, MINIX_DF)) {
2635 sbi->s_overhead_last = 0;
2636 } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
2637 unsigned long ngroups = sbi->s_groups_count, i;
2638 ext3_fsblk_t overhead = 0;
2642 * Compute the overhead (FS structures). This is constant
2643 * for a given filesystem unless the number of block groups
2644 * changes so we cache the previous value until it does.
2648 * All of the blocks before first_data_block are
2651 overhead = le32_to_cpu(es->s_first_data_block);
2654 * Add the overhead attributed to the superblock and
2655 * block group descriptors. If the sparse superblocks
2656 * feature is turned on, then not all groups have this.
2658 for (i = 0; i < ngroups; i++) {
2659 overhead += ext3_bg_has_super(sb, i) +
2660 ext3_bg_num_gdb(sb, i);
2665 * Every block group has an inode bitmap, a block
2666 * bitmap, and an inode table.
2668 overhead += ngroups * (2 + sbi->s_itb_per_group);
2669 sbi->s_overhead_last = overhead;
2671 sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
2674 buf->f_type = EXT3_SUPER_MAGIC;
2675 buf->f_bsize = sb->s_blocksize;
2676 buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last;
2677 buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter);
2678 es->s_free_blocks_count = cpu_to_le32(buf->f_bfree);
2679 buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
2680 if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
2682 buf->f_files = le32_to_cpu(es->s_inodes_count);
2683 buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);
2684 es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
2685 buf->f_namelen = EXT3_NAME_LEN;
2686 fsid = le64_to_cpup((void *)es->s_uuid) ^
2687 le64_to_cpup((void *)es->s_uuid + sizeof(u64));
2688 buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
2689 buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
2693 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2694 * is locked for write. Otherwise the are possible deadlocks:
2695 * Process 1 Process 2
2696 * ext3_create() quota_sync()
2697 * journal_start() write_dquot()
2698 * vfs_dq_init() down(dqio_mutex)
2699 * down(dqio_mutex) journal_start()
2705 static inline struct inode *dquot_to_inode(struct dquot *dquot)
2707 return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
2710 static int ext3_write_dquot(struct dquot *dquot)
2714 struct inode *inode;
2716 inode = dquot_to_inode(dquot);
2717 handle = ext3_journal_start(inode,
2718 EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2720 return PTR_ERR(handle);
2721 ret = dquot_commit(dquot);
2722 err = ext3_journal_stop(handle);
2728 static int ext3_acquire_dquot(struct dquot *dquot)
2733 handle = ext3_journal_start(dquot_to_inode(dquot),
2734 EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2736 return PTR_ERR(handle);
2737 ret = dquot_acquire(dquot);
2738 err = ext3_journal_stop(handle);
2744 static int ext3_release_dquot(struct dquot *dquot)
2749 handle = ext3_journal_start(dquot_to_inode(dquot),
2750 EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2751 if (IS_ERR(handle)) {
2752 /* Release dquot anyway to avoid endless cycle in dqput() */
2753 dquot_release(dquot);
2754 return PTR_ERR(handle);
2756 ret = dquot_release(dquot);
2757 err = ext3_journal_stop(handle);
2763 static int ext3_mark_dquot_dirty(struct dquot *dquot)
2765 /* Are we journaling quotas? */
2766 if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2767 EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2768 dquot_mark_dquot_dirty(dquot);
2769 return ext3_write_dquot(dquot);
2771 return dquot_mark_dquot_dirty(dquot);
2775 static int ext3_write_info(struct super_block *sb, int type)
2780 /* Data block + inode block */
2781 handle = ext3_journal_start(sb->s_root->d_inode, 2);
2783 return PTR_ERR(handle);
2784 ret = dquot_commit_info(sb, type);
2785 err = ext3_journal_stop(handle);
2792 * Turn on quotas during mount time - we need to find
2793 * the quota file and such...
2795 static int ext3_quota_on_mount(struct super_block *sb, int type)
2797 return vfs_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type],
2798 EXT3_SB(sb)->s_jquota_fmt, type);
2802 * Standard function to be called on quota_on
2804 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
2805 char *name, int remount)
2810 if (!test_opt(sb, QUOTA))
2812 /* When remounting, no checks are needed and in fact, name is NULL */
2814 return vfs_quota_on(sb, type, format_id, name, remount);
2816 err = kern_path(name, LOOKUP_FOLLOW, &path);
2820 /* Quotafile not on the same filesystem? */
2821 if (path.mnt->mnt_sb != sb) {
2825 /* Journaling quota? */
2826 if (EXT3_SB(sb)->s_qf_names[type]) {
2827 /* Quotafile not of fs root? */
2828 if (path.dentry->d_parent != sb->s_root)
2830 "EXT3-fs: Quota file not on filesystem root. "
2831 "Journaled quota will not work.\n");
2835 * When we journal data on quota file, we have to flush journal to see
2836 * all updates to the file when we bypass pagecache...
2838 if (ext3_should_journal_data(path.dentry->d_inode)) {
2840 * We don't need to lock updates but journal_flush() could
2841 * otherwise be livelocked...
2843 journal_lock_updates(EXT3_SB(sb)->s_journal);
2844 err = journal_flush(EXT3_SB(sb)->s_journal);
2845 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2852 err = vfs_quota_on_path(sb, type, format_id, &path);
2857 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2858 * acquiring the locks... As quota files are never truncated and quota code
2859 * itself serializes the operations (and noone else should touch the files)
2860 * we don't have to be afraid of races */
2861 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
2862 size_t len, loff_t off)
2864 struct inode *inode = sb_dqopt(sb)->files[type];
2865 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2867 int offset = off & (sb->s_blocksize - 1);
2870 struct buffer_head *bh;
2871 loff_t i_size = i_size_read(inode);
2875 if (off+len > i_size)
2878 while (toread > 0) {
2879 tocopy = sb->s_blocksize - offset < toread ?
2880 sb->s_blocksize - offset : toread;
2881 bh = ext3_bread(NULL, inode, blk, 0, &err);
2884 if (!bh) /* A hole? */
2885 memset(data, 0, tocopy);
2887 memcpy(data, bh->b_data+offset, tocopy);
2897 /* Write to quotafile (we know the transaction is already started and has
2898 * enough credits) */
2899 static ssize_t ext3_quota_write(struct super_block *sb, int type,
2900 const char *data, size_t len, loff_t off)
2902 struct inode *inode = sb_dqopt(sb)->files[type];
2903 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2905 int offset = off & (sb->s_blocksize - 1);
2907 int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL;
2908 size_t towrite = len;
2909 struct buffer_head *bh;
2910 handle_t *handle = journal_current_handle();
2913 printk(KERN_WARNING "EXT3-fs: Quota write (off=%Lu, len=%Lu)"
2914 " cancelled because transaction is not started.\n",
2915 (unsigned long long)off, (unsigned long long)len);
2918 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2919 while (towrite > 0) {
2920 tocopy = sb->s_blocksize - offset < towrite ?
2921 sb->s_blocksize - offset : towrite;
2922 bh = ext3_bread(handle, inode, blk, 1, &err);
2925 if (journal_quota) {
2926 err = ext3_journal_get_write_access(handle, bh);
2933 memcpy(bh->b_data+offset, data, tocopy);
2934 flush_dcache_page(bh->b_page);
2937 err = ext3_journal_dirty_metadata(handle, bh);
2939 /* Always do at least ordered writes for quotas */
2940 err = ext3_journal_dirty_data(handle, bh);
2941 mark_buffer_dirty(bh);
2952 if (len == towrite) {
2953 mutex_unlock(&inode->i_mutex);
2956 if (inode->i_size < off+len-towrite) {
2957 i_size_write(inode, off+len-towrite);
2958 EXT3_I(inode)->i_disksize = inode->i_size;
2961 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2962 ext3_mark_inode_dirty(handle, inode);
2963 mutex_unlock(&inode->i_mutex);
2964 return len - towrite;
2969 static int ext3_get_sb(struct file_system_type *fs_type,
2970 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
2972 return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super, mnt);
2975 static struct file_system_type ext3_fs_type = {
2976 .owner = THIS_MODULE,
2978 .get_sb = ext3_get_sb,
2979 .kill_sb = kill_block_super,
2980 .fs_flags = FS_REQUIRES_DEV,
2983 static int __init init_ext3_fs(void)
2985 int err = init_ext3_xattr();
2988 err = init_inodecache();
2991 err = register_filesystem(&ext3_fs_type);
2996 destroy_inodecache();
3002 static void __exit exit_ext3_fs(void)
3004 unregister_filesystem(&ext3_fs_type);
3005 destroy_inodecache();
3009 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3010 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3011 MODULE_LICENSE("GPL");
3012 module_init(init_ext3_fs)
3013 module_exit(exit_ext3_fs)