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 static int ext3_load_journal(struct super_block *, struct ext3_super_block *,
48 unsigned long journal_devnum);
49 static int ext3_create_journal(struct super_block *, struct ext3_super_block *,
51 static void ext3_commit_super (struct super_block * sb,
52 struct ext3_super_block * es,
54 static void ext3_mark_recovery_complete(struct super_block * sb,
55 struct ext3_super_block * es);
56 static void ext3_clear_journal_err(struct super_block * sb,
57 struct ext3_super_block * es);
58 static int ext3_sync_fs(struct super_block *sb, int wait);
59 static const char *ext3_decode_error(struct super_block * sb, int errno,
61 static int ext3_remount (struct super_block * sb, int * flags, char * data);
62 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf);
63 static void ext3_unlockfs(struct super_block *sb);
64 static void ext3_write_super (struct super_block * sb);
65 static void ext3_write_super_lockfs(struct super_block *sb);
68 * Wrappers for journal_start/end.
70 * The only special thing we need to do here is to make sure that all
71 * journal_end calls result in the superblock being marked dirty, so
72 * that sync() will call the filesystem's write_super callback if
75 handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
79 if (sb->s_flags & MS_RDONLY)
80 return ERR_PTR(-EROFS);
82 /* Special case here: if the journal has aborted behind our
83 * backs (eg. EIO in the commit thread), then we still need to
84 * take the FS itself readonly cleanly. */
85 journal = EXT3_SB(sb)->s_journal;
86 if (is_journal_aborted(journal)) {
87 ext3_abort(sb, __func__,
88 "Detected aborted journal");
89 return ERR_PTR(-EROFS);
92 return journal_start(journal, nblocks);
96 * The only special thing we need to do here is to make sure that all
97 * journal_stop calls result in the superblock being marked dirty, so
98 * that sync() will call the filesystem's write_super callback if
101 int __ext3_journal_stop(const char *where, handle_t *handle)
103 struct super_block *sb;
107 sb = handle->h_transaction->t_journal->j_private;
109 rc = journal_stop(handle);
114 __ext3_std_error(sb, where, err);
118 void ext3_journal_abort_handle(const char *caller, const char *err_fn,
119 struct buffer_head *bh, handle_t *handle, int err)
122 const char *errstr = ext3_decode_error(NULL, err, nbuf);
125 BUFFER_TRACE(bh, "abort");
130 if (is_handle_aborted(handle))
133 printk(KERN_ERR "%s: aborting transaction: %s in %s\n",
134 caller, errstr, err_fn);
136 journal_abort_handle(handle);
139 /* Deal with the reporting of failure conditions on a filesystem such as
140 * inconsistencies detected or read IO failures.
142 * On ext2, we can store the error state of the filesystem in the
143 * superblock. That is not possible on ext3, because we may have other
144 * write ordering constraints on the superblock which prevent us from
145 * writing it out straight away; and given that the journal is about to
146 * be aborted, we can't rely on the current, or future, transactions to
147 * write out the superblock safely.
149 * We'll just use the journal_abort() error code to record an error in
150 * the journal instead. On recovery, the journal will compain about
151 * that error until we've noted it down and cleared it.
154 static void ext3_handle_error(struct super_block *sb)
156 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
158 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
159 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
161 if (sb->s_flags & MS_RDONLY)
164 if (!test_opt (sb, ERRORS_CONT)) {
165 journal_t *journal = EXT3_SB(sb)->s_journal;
167 EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
169 journal_abort(journal, -EIO);
171 if (test_opt (sb, ERRORS_RO)) {
172 printk (KERN_CRIT "Remounting filesystem read-only\n");
173 sb->s_flags |= MS_RDONLY;
175 ext3_commit_super(sb, es, 1);
176 if (test_opt(sb, ERRORS_PANIC))
177 panic("EXT3-fs (device %s): panic forced after error\n",
181 void ext3_error (struct super_block * sb, const char * function,
182 const char * fmt, ...)
187 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
192 ext3_handle_error(sb);
195 static const char *ext3_decode_error(struct super_block * sb, int errno,
202 errstr = "IO failure";
205 errstr = "Out of memory";
208 if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT)
209 errstr = "Journal has aborted";
211 errstr = "Readonly filesystem";
214 /* If the caller passed in an extra buffer for unknown
215 * errors, textualise them now. Else we just return
218 /* Check for truncated error codes... */
219 if (snprintf(nbuf, 16, "error %d", -errno) >= 0)
228 /* __ext3_std_error decodes expected errors from journaling functions
229 * automatically and invokes the appropriate error response. */
231 void __ext3_std_error (struct super_block * sb, const char * function,
237 /* Special case: if the error is EROFS, and we're not already
238 * inside a transaction, then there's really no point in logging
240 if (errno == -EROFS && journal_current_handle() == NULL &&
241 (sb->s_flags & MS_RDONLY))
244 errstr = ext3_decode_error(sb, errno, nbuf);
245 printk (KERN_CRIT "EXT3-fs error (device %s) in %s: %s\n",
246 sb->s_id, function, errstr);
248 ext3_handle_error(sb);
252 * ext3_abort is a much stronger failure handler than ext3_error. The
253 * abort function may be used to deal with unrecoverable failures such
254 * as journal IO errors or ENOMEM at a critical moment in log management.
256 * We unconditionally force the filesystem into an ABORT|READONLY state,
257 * unless the error response on the fs has been set to panic in which
258 * case we take the easy way out and panic immediately.
261 void ext3_abort (struct super_block * sb, const char * function,
262 const char * fmt, ...)
266 printk (KERN_CRIT "ext3_abort called.\n");
269 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
274 if (test_opt(sb, ERRORS_PANIC))
275 panic("EXT3-fs panic from previous error\n");
277 if (sb->s_flags & MS_RDONLY)
280 printk(KERN_CRIT "Remounting filesystem read-only\n");
281 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
282 sb->s_flags |= MS_RDONLY;
283 EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
284 journal_abort(EXT3_SB(sb)->s_journal, -EIO);
287 void ext3_warning (struct super_block * sb, const char * function,
288 const char * fmt, ...)
293 printk(KERN_WARNING "EXT3-fs warning (device %s): %s: ",
300 void ext3_update_dynamic_rev(struct super_block *sb)
302 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
304 if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV)
307 ext3_warning(sb, __func__,
308 "updating to rev %d because of new feature flag, "
309 "running e2fsck is recommended",
312 es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO);
313 es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE);
314 es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV);
315 /* leave es->s_feature_*compat flags alone */
316 /* es->s_uuid will be set by e2fsck if empty */
319 * The rest of the superblock fields should be zero, and if not it
320 * means they are likely already in use, so leave them alone. We
321 * can leave it up to e2fsck to clean up any inconsistencies there.
326 * Open the external journal device
328 static struct block_device *ext3_blkdev_get(dev_t dev)
330 struct block_device *bdev;
331 char b[BDEVNAME_SIZE];
333 bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE);
339 printk(KERN_ERR "EXT3: failed to open journal device %s: %ld\n",
340 __bdevname(dev, b), PTR_ERR(bdev));
345 * Release the journal device
347 static int ext3_blkdev_put(struct block_device *bdev)
350 return blkdev_put(bdev, FMODE_READ|FMODE_WRITE);
353 static int ext3_blkdev_remove(struct ext3_sb_info *sbi)
355 struct block_device *bdev;
358 bdev = sbi->journal_bdev;
360 ret = ext3_blkdev_put(bdev);
361 sbi->journal_bdev = NULL;
366 static inline struct inode *orphan_list_entry(struct list_head *l)
368 return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode;
371 static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
375 printk(KERN_ERR "sb orphan head is %d\n",
376 le32_to_cpu(sbi->s_es->s_last_orphan));
378 printk(KERN_ERR "sb_info orphan list:\n");
379 list_for_each(l, &sbi->s_orphan) {
380 struct inode *inode = orphan_list_entry(l);
382 "inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
383 inode->i_sb->s_id, inode->i_ino, inode,
384 inode->i_mode, inode->i_nlink,
389 static void ext3_put_super (struct super_block * sb)
391 struct ext3_sb_info *sbi = EXT3_SB(sb);
392 struct ext3_super_block *es = sbi->s_es;
395 ext3_xattr_put_super(sb);
396 if (journal_destroy(sbi->s_journal) < 0)
397 ext3_abort(sb, __func__, "Couldn't clean up the journal");
398 if (!(sb->s_flags & MS_RDONLY)) {
399 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
400 es->s_state = cpu_to_le16(sbi->s_mount_state);
401 BUFFER_TRACE(sbi->s_sbh, "marking dirty");
402 mark_buffer_dirty(sbi->s_sbh);
403 ext3_commit_super(sb, es, 1);
406 for (i = 0; i < sbi->s_gdb_count; i++)
407 brelse(sbi->s_group_desc[i]);
408 kfree(sbi->s_group_desc);
409 percpu_counter_destroy(&sbi->s_freeblocks_counter);
410 percpu_counter_destroy(&sbi->s_freeinodes_counter);
411 percpu_counter_destroy(&sbi->s_dirs_counter);
414 for (i = 0; i < MAXQUOTAS; i++)
415 kfree(sbi->s_qf_names[i]);
418 /* Debugging code just in case the in-memory inode orphan list
419 * isn't empty. The on-disk one can be non-empty if we've
420 * detected an error and taken the fs readonly, but the
421 * in-memory list had better be clean by this point. */
422 if (!list_empty(&sbi->s_orphan))
423 dump_orphan_list(sb, sbi);
424 J_ASSERT(list_empty(&sbi->s_orphan));
426 invalidate_bdev(sb->s_bdev);
427 if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) {
429 * Invalidate the journal device's buffers. We don't want them
430 * floating about in memory - the physical journal device may
431 * hotswapped, and it breaks the `ro-after' testing code.
433 sync_blockdev(sbi->journal_bdev);
434 invalidate_bdev(sbi->journal_bdev);
435 ext3_blkdev_remove(sbi);
437 sb->s_fs_info = NULL;
442 static struct kmem_cache *ext3_inode_cachep;
445 * Called inside transaction, so use GFP_NOFS
447 static struct inode *ext3_alloc_inode(struct super_block *sb)
449 struct ext3_inode_info *ei;
451 ei = kmem_cache_alloc(ext3_inode_cachep, GFP_NOFS);
454 #ifdef CONFIG_EXT3_FS_POSIX_ACL
455 ei->i_acl = EXT3_ACL_NOT_CACHED;
456 ei->i_default_acl = EXT3_ACL_NOT_CACHED;
458 ei->i_block_alloc_info = NULL;
459 ei->vfs_inode.i_version = 1;
460 return &ei->vfs_inode;
463 static void ext3_destroy_inode(struct inode *inode)
465 if (!list_empty(&(EXT3_I(inode)->i_orphan))) {
466 printk("EXT3 Inode %p: orphan list check failed!\n",
468 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4,
469 EXT3_I(inode), sizeof(struct ext3_inode_info),
473 kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
476 static void init_once(void *foo)
478 struct ext3_inode_info *ei = (struct ext3_inode_info *) foo;
480 INIT_LIST_HEAD(&ei->i_orphan);
481 #ifdef CONFIG_EXT3_FS_XATTR
482 init_rwsem(&ei->xattr_sem);
484 mutex_init(&ei->truncate_mutex);
485 inode_init_once(&ei->vfs_inode);
488 static int init_inodecache(void)
490 ext3_inode_cachep = kmem_cache_create("ext3_inode_cache",
491 sizeof(struct ext3_inode_info),
492 0, (SLAB_RECLAIM_ACCOUNT|
495 if (ext3_inode_cachep == NULL)
500 static void destroy_inodecache(void)
502 kmem_cache_destroy(ext3_inode_cachep);
505 static void ext3_clear_inode(struct inode *inode)
507 struct ext3_block_alloc_info *rsv = EXT3_I(inode)->i_block_alloc_info;
508 #ifdef CONFIG_EXT3_FS_POSIX_ACL
509 if (EXT3_I(inode)->i_acl &&
510 EXT3_I(inode)->i_acl != EXT3_ACL_NOT_CACHED) {
511 posix_acl_release(EXT3_I(inode)->i_acl);
512 EXT3_I(inode)->i_acl = EXT3_ACL_NOT_CACHED;
514 if (EXT3_I(inode)->i_default_acl &&
515 EXT3_I(inode)->i_default_acl != EXT3_ACL_NOT_CACHED) {
516 posix_acl_release(EXT3_I(inode)->i_default_acl);
517 EXT3_I(inode)->i_default_acl = EXT3_ACL_NOT_CACHED;
520 ext3_discard_reservation(inode);
521 EXT3_I(inode)->i_block_alloc_info = NULL;
526 static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb)
528 #if defined(CONFIG_QUOTA)
529 struct ext3_sb_info *sbi = EXT3_SB(sb);
531 if (sbi->s_jquota_fmt)
532 seq_printf(seq, ",jqfmt=%s",
533 (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0");
535 if (sbi->s_qf_names[USRQUOTA])
536 seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]);
538 if (sbi->s_qf_names[GRPQUOTA])
539 seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]);
541 if (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA)
542 seq_puts(seq, ",usrquota");
544 if (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)
545 seq_puts(seq, ",grpquota");
551 * - it's set to a non-default value OR
552 * - if the per-sb default is different from the global default
554 static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
556 struct super_block *sb = vfs->mnt_sb;
557 struct ext3_sb_info *sbi = EXT3_SB(sb);
558 struct ext3_super_block *es = sbi->s_es;
559 unsigned long def_mount_opts;
561 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
563 if (sbi->s_sb_block != 1)
564 seq_printf(seq, ",sb=%lu", sbi->s_sb_block);
565 if (test_opt(sb, MINIX_DF))
566 seq_puts(seq, ",minixdf");
567 if (test_opt(sb, GRPID))
568 seq_puts(seq, ",grpid");
569 if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS))
570 seq_puts(seq, ",nogrpid");
571 if (sbi->s_resuid != EXT3_DEF_RESUID ||
572 le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) {
573 seq_printf(seq, ",resuid=%u", sbi->s_resuid);
575 if (sbi->s_resgid != EXT3_DEF_RESGID ||
576 le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) {
577 seq_printf(seq, ",resgid=%u", sbi->s_resgid);
579 if (test_opt(sb, ERRORS_RO)) {
580 int def_errors = le16_to_cpu(es->s_errors);
582 if (def_errors == EXT3_ERRORS_PANIC ||
583 def_errors == EXT3_ERRORS_CONTINUE) {
584 seq_puts(seq, ",errors=remount-ro");
587 if (test_opt(sb, ERRORS_CONT))
588 seq_puts(seq, ",errors=continue");
589 if (test_opt(sb, ERRORS_PANIC))
590 seq_puts(seq, ",errors=panic");
591 if (test_opt(sb, NO_UID32))
592 seq_puts(seq, ",nouid32");
593 if (test_opt(sb, DEBUG))
594 seq_puts(seq, ",debug");
595 if (test_opt(sb, OLDALLOC))
596 seq_puts(seq, ",oldalloc");
597 #ifdef CONFIG_EXT3_FS_XATTR
598 if (test_opt(sb, XATTR_USER))
599 seq_puts(seq, ",user_xattr");
600 if (!test_opt(sb, XATTR_USER) &&
601 (def_mount_opts & EXT3_DEFM_XATTR_USER)) {
602 seq_puts(seq, ",nouser_xattr");
605 #ifdef CONFIG_EXT3_FS_POSIX_ACL
606 if (test_opt(sb, POSIX_ACL))
607 seq_puts(seq, ",acl");
608 if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL))
609 seq_puts(seq, ",noacl");
611 if (!test_opt(sb, RESERVATION))
612 seq_puts(seq, ",noreservation");
613 if (sbi->s_commit_interval) {
614 seq_printf(seq, ",commit=%u",
615 (unsigned) (sbi->s_commit_interval / HZ));
617 if (test_opt(sb, BARRIER))
618 seq_puts(seq, ",barrier=1");
619 if (test_opt(sb, NOBH))
620 seq_puts(seq, ",nobh");
622 if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA)
623 seq_puts(seq, ",data=journal");
624 else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA)
625 seq_puts(seq, ",data=ordered");
626 else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)
627 seq_puts(seq, ",data=writeback");
629 if (test_opt(sb, DATA_ERR_ABORT))
630 seq_puts(seq, ",data_err=abort");
632 ext3_show_quota_options(seq, sb);
638 static struct inode *ext3_nfs_get_inode(struct super_block *sb,
639 u64 ino, u32 generation)
643 if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO)
644 return ERR_PTR(-ESTALE);
645 if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count))
646 return ERR_PTR(-ESTALE);
648 /* iget isn't really right if the inode is currently unallocated!!
650 * ext3_read_inode will return a bad_inode if the inode had been
651 * deleted, so we should be safe.
653 * Currently we don't know the generation for parent directory, so
654 * a generation of 0 means "accept any"
656 inode = ext3_iget(sb, ino);
658 return ERR_CAST(inode);
659 if (generation && inode->i_generation != generation) {
661 return ERR_PTR(-ESTALE);
667 static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid,
668 int fh_len, int fh_type)
670 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
674 static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid,
675 int fh_len, int fh_type)
677 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
682 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
683 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
685 static int ext3_dquot_initialize(struct inode *inode, int type);
686 static int ext3_dquot_drop(struct inode *inode);
687 static int ext3_write_dquot(struct dquot *dquot);
688 static int ext3_acquire_dquot(struct dquot *dquot);
689 static int ext3_release_dquot(struct dquot *dquot);
690 static int ext3_mark_dquot_dirty(struct dquot *dquot);
691 static int ext3_write_info(struct super_block *sb, int type);
692 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
693 char *path, int remount);
694 static int ext3_quota_on_mount(struct super_block *sb, int type);
695 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
696 size_t len, loff_t off);
697 static ssize_t ext3_quota_write(struct super_block *sb, int type,
698 const char *data, size_t len, loff_t off);
700 static struct dquot_operations ext3_quota_operations = {
701 .initialize = ext3_dquot_initialize,
702 .drop = ext3_dquot_drop,
703 .alloc_space = dquot_alloc_space,
704 .alloc_inode = dquot_alloc_inode,
705 .free_space = dquot_free_space,
706 .free_inode = dquot_free_inode,
707 .transfer = dquot_transfer,
708 .write_dquot = ext3_write_dquot,
709 .acquire_dquot = ext3_acquire_dquot,
710 .release_dquot = ext3_release_dquot,
711 .mark_dirty = ext3_mark_dquot_dirty,
712 .write_info = ext3_write_info
715 static struct quotactl_ops ext3_qctl_operations = {
716 .quota_on = ext3_quota_on,
717 .quota_off = vfs_quota_off,
718 .quota_sync = vfs_quota_sync,
719 .get_info = vfs_get_dqinfo,
720 .set_info = vfs_set_dqinfo,
721 .get_dqblk = vfs_get_dqblk,
722 .set_dqblk = vfs_set_dqblk
726 static const struct super_operations ext3_sops = {
727 .alloc_inode = ext3_alloc_inode,
728 .destroy_inode = ext3_destroy_inode,
729 .write_inode = ext3_write_inode,
730 .dirty_inode = ext3_dirty_inode,
731 .delete_inode = ext3_delete_inode,
732 .put_super = ext3_put_super,
733 .write_super = ext3_write_super,
734 .sync_fs = ext3_sync_fs,
735 .write_super_lockfs = ext3_write_super_lockfs,
736 .unlockfs = ext3_unlockfs,
737 .statfs = ext3_statfs,
738 .remount_fs = ext3_remount,
739 .clear_inode = ext3_clear_inode,
740 .show_options = ext3_show_options,
742 .quota_read = ext3_quota_read,
743 .quota_write = ext3_quota_write,
747 static const struct export_operations ext3_export_ops = {
748 .fh_to_dentry = ext3_fh_to_dentry,
749 .fh_to_parent = ext3_fh_to_parent,
750 .get_parent = ext3_get_parent,
754 Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
755 Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
756 Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
757 Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
758 Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
759 Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
760 Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
761 Opt_data_err_abort, Opt_data_err_ignore,
762 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
763 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
764 Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
768 static const match_table_t tokens = {
769 {Opt_bsd_df, "bsddf"},
770 {Opt_minix_df, "minixdf"},
771 {Opt_grpid, "grpid"},
772 {Opt_grpid, "bsdgroups"},
773 {Opt_nogrpid, "nogrpid"},
774 {Opt_nogrpid, "sysvgroups"},
775 {Opt_resgid, "resgid=%u"},
776 {Opt_resuid, "resuid=%u"},
778 {Opt_err_cont, "errors=continue"},
779 {Opt_err_panic, "errors=panic"},
780 {Opt_err_ro, "errors=remount-ro"},
781 {Opt_nouid32, "nouid32"},
782 {Opt_nocheck, "nocheck"},
783 {Opt_nocheck, "check=none"},
784 {Opt_debug, "debug"},
785 {Opt_oldalloc, "oldalloc"},
786 {Opt_orlov, "orlov"},
787 {Opt_user_xattr, "user_xattr"},
788 {Opt_nouser_xattr, "nouser_xattr"},
790 {Opt_noacl, "noacl"},
791 {Opt_reservation, "reservation"},
792 {Opt_noreservation, "noreservation"},
793 {Opt_noload, "noload"},
796 {Opt_commit, "commit=%u"},
797 {Opt_journal_update, "journal=update"},
798 {Opt_journal_inum, "journal=%u"},
799 {Opt_journal_dev, "journal_dev=%u"},
800 {Opt_abort, "abort"},
801 {Opt_data_journal, "data=journal"},
802 {Opt_data_ordered, "data=ordered"},
803 {Opt_data_writeback, "data=writeback"},
804 {Opt_data_err_abort, "data_err=abort"},
805 {Opt_data_err_ignore, "data_err=ignore"},
806 {Opt_offusrjquota, "usrjquota="},
807 {Opt_usrjquota, "usrjquota=%s"},
808 {Opt_offgrpjquota, "grpjquota="},
809 {Opt_grpjquota, "grpjquota=%s"},
810 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
811 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
812 {Opt_grpquota, "grpquota"},
813 {Opt_noquota, "noquota"},
814 {Opt_quota, "quota"},
815 {Opt_usrquota, "usrquota"},
816 {Opt_barrier, "barrier=%u"},
817 {Opt_resize, "resize"},
821 static ext3_fsblk_t get_sb_block(void **data)
823 ext3_fsblk_t sb_block;
824 char *options = (char *) *data;
826 if (!options || strncmp(options, "sb=", 3) != 0)
827 return 1; /* Default location */
829 /*todo: use simple_strtoll with >32bit ext3 */
830 sb_block = simple_strtoul(options, &options, 0);
831 if (*options && *options != ',') {
832 printk("EXT3-fs: Invalid sb specification: %s\n",
838 *data = (void *) options;
842 static int parse_options (char *options, struct super_block *sb,
843 unsigned int *inum, unsigned long *journal_devnum,
844 ext3_fsblk_t *n_blocks_count, int is_remount)
846 struct ext3_sb_info *sbi = EXT3_SB(sb);
848 substring_t args[MAX_OPT_ARGS];
859 while ((p = strsep (&options, ",")) != NULL) {
864 token = match_token(p, tokens, args);
867 clear_opt (sbi->s_mount_opt, MINIX_DF);
870 set_opt (sbi->s_mount_opt, MINIX_DF);
873 set_opt (sbi->s_mount_opt, GRPID);
876 clear_opt (sbi->s_mount_opt, GRPID);
879 if (match_int(&args[0], &option))
881 sbi->s_resuid = option;
884 if (match_int(&args[0], &option))
886 sbi->s_resgid = option;
889 /* handled by get_sb_block() instead of here */
890 /* *sb_block = match_int(&args[0]); */
893 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
894 clear_opt (sbi->s_mount_opt, ERRORS_RO);
895 set_opt (sbi->s_mount_opt, ERRORS_PANIC);
898 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
899 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
900 set_opt (sbi->s_mount_opt, ERRORS_RO);
903 clear_opt (sbi->s_mount_opt, ERRORS_RO);
904 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
905 set_opt (sbi->s_mount_opt, ERRORS_CONT);
908 set_opt (sbi->s_mount_opt, NO_UID32);
911 clear_opt (sbi->s_mount_opt, CHECK);
914 set_opt (sbi->s_mount_opt, DEBUG);
917 set_opt (sbi->s_mount_opt, OLDALLOC);
920 clear_opt (sbi->s_mount_opt, OLDALLOC);
922 #ifdef CONFIG_EXT3_FS_XATTR
924 set_opt (sbi->s_mount_opt, XATTR_USER);
926 case Opt_nouser_xattr:
927 clear_opt (sbi->s_mount_opt, XATTR_USER);
931 case Opt_nouser_xattr:
932 printk("EXT3 (no)user_xattr options not supported\n");
935 #ifdef CONFIG_EXT3_FS_POSIX_ACL
937 set_opt(sbi->s_mount_opt, POSIX_ACL);
940 clear_opt(sbi->s_mount_opt, POSIX_ACL);
945 printk("EXT3 (no)acl options not supported\n");
948 case Opt_reservation:
949 set_opt(sbi->s_mount_opt, RESERVATION);
951 case Opt_noreservation:
952 clear_opt(sbi->s_mount_opt, RESERVATION);
954 case Opt_journal_update:
956 /* Eventually we will want to be able to create
957 a journal file here. For now, only allow the
958 user to specify an existing inode to be the
961 printk(KERN_ERR "EXT3-fs: cannot specify "
962 "journal on remount\n");
965 set_opt (sbi->s_mount_opt, UPDATE_JOURNAL);
967 case Opt_journal_inum:
969 printk(KERN_ERR "EXT3-fs: cannot specify "
970 "journal on remount\n");
973 if (match_int(&args[0], &option))
977 case Opt_journal_dev:
979 printk(KERN_ERR "EXT3-fs: cannot specify "
980 "journal on remount\n");
983 if (match_int(&args[0], &option))
985 *journal_devnum = option;
988 set_opt (sbi->s_mount_opt, NOLOAD);
991 if (match_int(&args[0], &option))
996 option = JBD_DEFAULT_MAX_COMMIT_AGE;
997 sbi->s_commit_interval = HZ * option;
999 case Opt_data_journal:
1000 data_opt = EXT3_MOUNT_JOURNAL_DATA;
1002 case Opt_data_ordered:
1003 data_opt = EXT3_MOUNT_ORDERED_DATA;
1005 case Opt_data_writeback:
1006 data_opt = EXT3_MOUNT_WRITEBACK_DATA;
1009 if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS)
1012 "EXT3-fs: cannot change data "
1013 "mode on remount\n");
1017 sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS;
1018 sbi->s_mount_opt |= data_opt;
1021 case Opt_data_err_abort:
1022 set_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1024 case Opt_data_err_ignore:
1025 clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1034 if ((sb_any_quota_enabled(sb) ||
1035 sb_any_quota_suspended(sb)) &&
1036 !sbi->s_qf_names[qtype]) {
1038 "EXT3-fs: Cannot change journaled "
1039 "quota options when quota turned on.\n");
1042 qname = match_strdup(&args[0]);
1045 "EXT3-fs: not enough memory for "
1046 "storing quotafile name.\n");
1049 if (sbi->s_qf_names[qtype] &&
1050 strcmp(sbi->s_qf_names[qtype], qname)) {
1052 "EXT3-fs: %s quota file already "
1053 "specified.\n", QTYPE2NAME(qtype));
1057 sbi->s_qf_names[qtype] = qname;
1058 if (strchr(sbi->s_qf_names[qtype], '/')) {
1060 "EXT3-fs: quotafile must be on "
1061 "filesystem root.\n");
1062 kfree(sbi->s_qf_names[qtype]);
1063 sbi->s_qf_names[qtype] = NULL;
1066 set_opt(sbi->s_mount_opt, QUOTA);
1068 case Opt_offusrjquota:
1071 case Opt_offgrpjquota:
1074 if ((sb_any_quota_enabled(sb) ||
1075 sb_any_quota_suspended(sb)) &&
1076 sbi->s_qf_names[qtype]) {
1077 printk(KERN_ERR "EXT3-fs: Cannot change "
1078 "journaled quota options when "
1079 "quota turned on.\n");
1083 * The space will be released later when all options
1084 * are confirmed to be correct
1086 sbi->s_qf_names[qtype] = NULL;
1088 case Opt_jqfmt_vfsold:
1089 qfmt = QFMT_VFS_OLD;
1091 case Opt_jqfmt_vfsv0:
1094 if ((sb_any_quota_enabled(sb) ||
1095 sb_any_quota_suspended(sb)) &&
1096 sbi->s_jquota_fmt != qfmt) {
1097 printk(KERN_ERR "EXT3-fs: Cannot change "
1098 "journaled quota options when "
1099 "quota turned on.\n");
1102 sbi->s_jquota_fmt = qfmt;
1106 set_opt(sbi->s_mount_opt, QUOTA);
1107 set_opt(sbi->s_mount_opt, USRQUOTA);
1110 set_opt(sbi->s_mount_opt, QUOTA);
1111 set_opt(sbi->s_mount_opt, GRPQUOTA);
1114 if (sb_any_quota_enabled(sb) ||
1115 sb_any_quota_suspended(sb)) {
1116 printk(KERN_ERR "EXT3-fs: Cannot change quota "
1117 "options when quota turned on.\n");
1120 clear_opt(sbi->s_mount_opt, QUOTA);
1121 clear_opt(sbi->s_mount_opt, USRQUOTA);
1122 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1129 "EXT3-fs: quota options not supported.\n");
1133 case Opt_offusrjquota:
1134 case Opt_offgrpjquota:
1135 case Opt_jqfmt_vfsold:
1136 case Opt_jqfmt_vfsv0:
1138 "EXT3-fs: journaled quota options not "
1145 set_opt(sbi->s_mount_opt, ABORT);
1148 if (match_int(&args[0], &option))
1151 set_opt(sbi->s_mount_opt, BARRIER);
1153 clear_opt(sbi->s_mount_opt, BARRIER);
1159 printk("EXT3-fs: resize option only available "
1163 if (match_int(&args[0], &option) != 0)
1165 *n_blocks_count = option;
1168 set_opt(sbi->s_mount_opt, NOBH);
1171 clear_opt(sbi->s_mount_opt, NOBH);
1175 "EXT3-fs: Unrecognized mount option \"%s\" "
1176 "or missing value\n", p);
1181 if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
1182 if ((sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) &&
1183 sbi->s_qf_names[USRQUOTA])
1184 clear_opt(sbi->s_mount_opt, USRQUOTA);
1186 if ((sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) &&
1187 sbi->s_qf_names[GRPQUOTA])
1188 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1190 if ((sbi->s_qf_names[USRQUOTA] &&
1191 (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)) ||
1192 (sbi->s_qf_names[GRPQUOTA] &&
1193 (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA))) {
1194 printk(KERN_ERR "EXT3-fs: old and new quota "
1195 "format mixing.\n");
1199 if (!sbi->s_jquota_fmt) {
1200 printk(KERN_ERR "EXT3-fs: journaled quota format "
1201 "not specified.\n");
1205 if (sbi->s_jquota_fmt) {
1206 printk(KERN_ERR "EXT3-fs: journaled quota format "
1207 "specified with no journaling "
1216 static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es,
1219 struct ext3_sb_info *sbi = EXT3_SB(sb);
1222 if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) {
1223 printk (KERN_ERR "EXT3-fs warning: revision level too high, "
1224 "forcing read-only mode\n");
1229 if (!(sbi->s_mount_state & EXT3_VALID_FS))
1230 printk (KERN_WARNING "EXT3-fs warning: mounting unchecked fs, "
1231 "running e2fsck is recommended\n");
1232 else if ((sbi->s_mount_state & EXT3_ERROR_FS))
1233 printk (KERN_WARNING
1234 "EXT3-fs warning: mounting fs with errors, "
1235 "running e2fsck is recommended\n");
1236 else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 &&
1237 le16_to_cpu(es->s_mnt_count) >=
1238 (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))
1239 printk (KERN_WARNING
1240 "EXT3-fs warning: maximal mount count reached, "
1241 "running e2fsck is recommended\n");
1242 else if (le32_to_cpu(es->s_checkinterval) &&
1243 (le32_to_cpu(es->s_lastcheck) +
1244 le32_to_cpu(es->s_checkinterval) <= get_seconds()))
1245 printk (KERN_WARNING
1246 "EXT3-fs warning: checktime reached, "
1247 "running e2fsck is recommended\n");
1249 /* @@@ We _will_ want to clear the valid bit if we find
1250 inconsistencies, to force a fsck at reboot. But for
1251 a plain journaled filesystem we can keep it set as
1252 valid forever! :) */
1253 es->s_state &= cpu_to_le16(~EXT3_VALID_FS);
1255 if (!(__s16) le16_to_cpu(es->s_max_mnt_count))
1256 es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT);
1257 le16_add_cpu(&es->s_mnt_count, 1);
1258 es->s_mtime = cpu_to_le32(get_seconds());
1259 ext3_update_dynamic_rev(sb);
1260 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
1262 ext3_commit_super(sb, es, 1);
1263 if (test_opt(sb, DEBUG))
1264 printk(KERN_INFO "[EXT3 FS bs=%lu, gc=%lu, "
1265 "bpg=%lu, ipg=%lu, mo=%04lx]\n",
1267 sbi->s_groups_count,
1268 EXT3_BLOCKS_PER_GROUP(sb),
1269 EXT3_INODES_PER_GROUP(sb),
1272 printk(KERN_INFO "EXT3 FS on %s, ", sb->s_id);
1273 if (EXT3_SB(sb)->s_journal->j_inode == NULL) {
1274 char b[BDEVNAME_SIZE];
1276 printk("external journal on %s\n",
1277 bdevname(EXT3_SB(sb)->s_journal->j_dev, b));
1279 printk("internal journal\n");
1284 /* Called at mount-time, super-block is locked */
1285 static int ext3_check_descriptors(struct super_block *sb)
1287 struct ext3_sb_info *sbi = EXT3_SB(sb);
1290 ext3_debug ("Checking group descriptors");
1292 for (i = 0; i < sbi->s_groups_count; i++) {
1293 struct ext3_group_desc *gdp = ext3_get_group_desc(sb, i, NULL);
1294 ext3_fsblk_t first_block = ext3_group_first_block_no(sb, i);
1295 ext3_fsblk_t last_block;
1297 if (i == sbi->s_groups_count - 1)
1298 last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
1300 last_block = first_block +
1301 (EXT3_BLOCKS_PER_GROUP(sb) - 1);
1303 if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
1304 le32_to_cpu(gdp->bg_block_bitmap) > last_block)
1306 ext3_error (sb, "ext3_check_descriptors",
1307 "Block bitmap for group %d"
1308 " not in group (block %lu)!",
1310 le32_to_cpu(gdp->bg_block_bitmap));
1313 if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block ||
1314 le32_to_cpu(gdp->bg_inode_bitmap) > last_block)
1316 ext3_error (sb, "ext3_check_descriptors",
1317 "Inode bitmap for group %d"
1318 " not in group (block %lu)!",
1320 le32_to_cpu(gdp->bg_inode_bitmap));
1323 if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
1324 le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 >
1327 ext3_error (sb, "ext3_check_descriptors",
1328 "Inode table for group %d"
1329 " not in group (block %lu)!",
1331 le32_to_cpu(gdp->bg_inode_table));
1336 sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb));
1337 sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb));
1342 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1343 * the superblock) which were deleted from all directories, but held open by
1344 * a process at the time of a crash. We walk the list and try to delete these
1345 * inodes at recovery time (only with a read-write filesystem).
1347 * In order to keep the orphan inode chain consistent during traversal (in
1348 * case of crash during recovery), we link each inode into the superblock
1349 * orphan list_head and handle it the same way as an inode deletion during
1350 * normal operation (which journals the operations for us).
1352 * We only do an iget() and an iput() on each inode, which is very safe if we
1353 * accidentally point at an in-use or already deleted inode. The worst that
1354 * can happen in this case is that we get a "bit already cleared" message from
1355 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1356 * e2fsck was run on this filesystem, and it must have already done the orphan
1357 * inode cleanup for us, so we can safely abort without any further action.
1359 static void ext3_orphan_cleanup (struct super_block * sb,
1360 struct ext3_super_block * es)
1362 unsigned int s_flags = sb->s_flags;
1363 int nr_orphans = 0, nr_truncates = 0;
1367 if (!es->s_last_orphan) {
1368 jbd_debug(4, "no orphan inodes to clean up\n");
1372 if (bdev_read_only(sb->s_bdev)) {
1373 printk(KERN_ERR "EXT3-fs: write access "
1374 "unavailable, skipping orphan cleanup.\n");
1378 if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) {
1379 if (es->s_last_orphan)
1380 jbd_debug(1, "Errors on filesystem, "
1381 "clearing orphan list.\n");
1382 es->s_last_orphan = 0;
1383 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1387 if (s_flags & MS_RDONLY) {
1388 printk(KERN_INFO "EXT3-fs: %s: orphan cleanup on readonly fs\n",
1390 sb->s_flags &= ~MS_RDONLY;
1393 /* Needed for iput() to work correctly and not trash data */
1394 sb->s_flags |= MS_ACTIVE;
1395 /* Turn on quotas so that they are updated correctly */
1396 for (i = 0; i < MAXQUOTAS; i++) {
1397 if (EXT3_SB(sb)->s_qf_names[i]) {
1398 int ret = ext3_quota_on_mount(sb, i);
1401 "EXT3-fs: Cannot turn on journaled "
1402 "quota: error %d\n", ret);
1407 while (es->s_last_orphan) {
1408 struct inode *inode;
1410 inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan));
1411 if (IS_ERR(inode)) {
1412 es->s_last_orphan = 0;
1416 list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan);
1418 if (inode->i_nlink) {
1420 "%s: truncating inode %lu to %Ld bytes\n",
1421 __func__, inode->i_ino, inode->i_size);
1422 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1423 inode->i_ino, inode->i_size);
1424 ext3_truncate(inode);
1428 "%s: deleting unreferenced inode %lu\n",
1429 __func__, inode->i_ino);
1430 jbd_debug(2, "deleting unreferenced inode %lu\n",
1434 iput(inode); /* The delete magic happens here! */
1437 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1440 printk(KERN_INFO "EXT3-fs: %s: %d orphan inode%s deleted\n",
1441 sb->s_id, PLURAL(nr_orphans));
1443 printk(KERN_INFO "EXT3-fs: %s: %d truncate%s cleaned up\n",
1444 sb->s_id, PLURAL(nr_truncates));
1446 /* Turn quotas off */
1447 for (i = 0; i < MAXQUOTAS; i++) {
1448 if (sb_dqopt(sb)->files[i])
1449 vfs_quota_off(sb, i, 0);
1452 sb->s_flags = s_flags; /* Restore MS_RDONLY status */
1456 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1457 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1458 * We need to be 1 filesystem block less than the 2^32 sector limit.
1460 static loff_t ext3_max_size(int bits)
1462 loff_t res = EXT3_NDIR_BLOCKS;
1466 /* This is calculated to be the largest file size for a
1467 * dense, file such that the total number of
1468 * sectors in the file, including data and all indirect blocks,
1469 * does not exceed 2^32 -1
1470 * __u32 i_blocks representing the total number of
1471 * 512 bytes blocks of the file
1473 upper_limit = (1LL << 32) - 1;
1475 /* total blocks in file system block size */
1476 upper_limit >>= (bits - 9);
1479 /* indirect blocks */
1481 /* double indirect blocks */
1482 meta_blocks += 1 + (1LL << (bits-2));
1483 /* tripple indirect blocks */
1484 meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
1486 upper_limit -= meta_blocks;
1487 upper_limit <<= bits;
1489 res += 1LL << (bits-2);
1490 res += 1LL << (2*(bits-2));
1491 res += 1LL << (3*(bits-2));
1493 if (res > upper_limit)
1496 if (res > MAX_LFS_FILESIZE)
1497 res = MAX_LFS_FILESIZE;
1502 static ext3_fsblk_t descriptor_loc(struct super_block *sb,
1503 ext3_fsblk_t logic_sb_block,
1506 struct ext3_sb_info *sbi = EXT3_SB(sb);
1507 unsigned long bg, first_meta_bg;
1510 first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
1512 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) ||
1514 return (logic_sb_block + nr + 1);
1515 bg = sbi->s_desc_per_block * nr;
1516 if (ext3_bg_has_super(sb, bg))
1518 return (has_super + ext3_group_first_block_no(sb, bg));
1522 static int ext3_fill_super (struct super_block *sb, void *data, int silent)
1524 struct buffer_head * bh;
1525 struct ext3_super_block *es = NULL;
1526 struct ext3_sb_info *sbi;
1528 ext3_fsblk_t sb_block = get_sb_block(&data);
1529 ext3_fsblk_t logic_sb_block;
1530 unsigned long offset = 0;
1531 unsigned int journal_inum = 0;
1532 unsigned long journal_devnum = 0;
1533 unsigned long def_mount_opts;
1544 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
1547 sb->s_fs_info = sbi;
1548 sbi->s_mount_opt = 0;
1549 sbi->s_resuid = EXT3_DEF_RESUID;
1550 sbi->s_resgid = EXT3_DEF_RESGID;
1551 sbi->s_sb_block = sb_block;
1555 blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE);
1557 printk(KERN_ERR "EXT3-fs: unable to set blocksize\n");
1562 * The ext3 superblock will not be buffer aligned for other than 1kB
1563 * block sizes. We need to calculate the offset from buffer start.
1565 if (blocksize != EXT3_MIN_BLOCK_SIZE) {
1566 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1567 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1569 logic_sb_block = sb_block;
1572 if (!(bh = sb_bread(sb, logic_sb_block))) {
1573 printk (KERN_ERR "EXT3-fs: unable to read superblock\n");
1577 * Note: s_es must be initialized as soon as possible because
1578 * some ext3 macro-instructions depend on its value
1580 es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
1582 sb->s_magic = le16_to_cpu(es->s_magic);
1583 if (sb->s_magic != EXT3_SUPER_MAGIC)
1586 /* Set defaults before we parse the mount options */
1587 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
1588 if (def_mount_opts & EXT3_DEFM_DEBUG)
1589 set_opt(sbi->s_mount_opt, DEBUG);
1590 if (def_mount_opts & EXT3_DEFM_BSDGROUPS)
1591 set_opt(sbi->s_mount_opt, GRPID);
1592 if (def_mount_opts & EXT3_DEFM_UID16)
1593 set_opt(sbi->s_mount_opt, NO_UID32);
1594 #ifdef CONFIG_EXT3_FS_XATTR
1595 if (def_mount_opts & EXT3_DEFM_XATTR_USER)
1596 set_opt(sbi->s_mount_opt, XATTR_USER);
1598 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1599 if (def_mount_opts & EXT3_DEFM_ACL)
1600 set_opt(sbi->s_mount_opt, POSIX_ACL);
1602 if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA)
1603 sbi->s_mount_opt |= EXT3_MOUNT_JOURNAL_DATA;
1604 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED)
1605 sbi->s_mount_opt |= EXT3_MOUNT_ORDERED_DATA;
1606 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK)
1607 sbi->s_mount_opt |= EXT3_MOUNT_WRITEBACK_DATA;
1609 if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC)
1610 set_opt(sbi->s_mount_opt, ERRORS_PANIC);
1611 else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_CONTINUE)
1612 set_opt(sbi->s_mount_opt, ERRORS_CONT);
1614 set_opt(sbi->s_mount_opt, ERRORS_RO);
1616 sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
1617 sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
1619 set_opt(sbi->s_mount_opt, RESERVATION);
1621 if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
1625 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1626 ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1628 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV &&
1629 (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) ||
1630 EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
1631 EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U)))
1633 "EXT3-fs warning: feature flags set on rev 0 fs, "
1634 "running e2fsck is recommended\n");
1636 * Check feature flags regardless of the revision level, since we
1637 * previously didn't change the revision level when setting the flags,
1638 * so there is a chance incompat flags are set on a rev 0 filesystem.
1640 features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP);
1642 printk(KERN_ERR "EXT3-fs: %s: couldn't mount because of "
1643 "unsupported optional features (%x).\n",
1644 sb->s_id, le32_to_cpu(features));
1647 features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP);
1648 if (!(sb->s_flags & MS_RDONLY) && features) {
1649 printk(KERN_ERR "EXT3-fs: %s: couldn't mount RDWR because of "
1650 "unsupported optional features (%x).\n",
1651 sb->s_id, le32_to_cpu(features));
1654 blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
1656 if (blocksize < EXT3_MIN_BLOCK_SIZE ||
1657 blocksize > EXT3_MAX_BLOCK_SIZE) {
1659 "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n",
1660 blocksize, sb->s_id);
1664 hblock = bdev_hardsect_size(sb->s_bdev);
1665 if (sb->s_blocksize != blocksize) {
1667 * Make sure the blocksize for the filesystem is larger
1668 * than the hardware sectorsize for the machine.
1670 if (blocksize < hblock) {
1671 printk(KERN_ERR "EXT3-fs: blocksize %d too small for "
1672 "device blocksize %d.\n", blocksize, hblock);
1677 if (!sb_set_blocksize(sb, blocksize)) {
1678 printk(KERN_ERR "EXT3-fs: bad blocksize %d.\n",
1682 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1683 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1684 bh = sb_bread(sb, logic_sb_block);
1687 "EXT3-fs: Can't read superblock on 2nd try.\n");
1690 es = (struct ext3_super_block *)(((char *)bh->b_data) + offset);
1692 if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) {
1694 "EXT3-fs: Magic mismatch, very weird !\n");
1699 sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits);
1701 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) {
1702 sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE;
1703 sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO;
1705 sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
1706 sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
1707 if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) ||
1708 (!is_power_of_2(sbi->s_inode_size)) ||
1709 (sbi->s_inode_size > blocksize)) {
1711 "EXT3-fs: unsupported inode size: %d\n",
1716 sbi->s_frag_size = EXT3_MIN_FRAG_SIZE <<
1717 le32_to_cpu(es->s_log_frag_size);
1718 if (blocksize != sbi->s_frag_size) {
1720 "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n",
1721 sbi->s_frag_size, blocksize);
1724 sbi->s_frags_per_block = 1;
1725 sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
1726 sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
1727 sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
1728 if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0)
1730 sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb);
1731 if (sbi->s_inodes_per_block == 0)
1733 sbi->s_itb_per_group = sbi->s_inodes_per_group /
1734 sbi->s_inodes_per_block;
1735 sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc);
1737 sbi->s_mount_state = le16_to_cpu(es->s_state);
1738 sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb));
1739 sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb));
1740 for (i=0; i < 4; i++)
1741 sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
1742 sbi->s_def_hash_version = es->s_def_hash_version;
1744 if (sbi->s_blocks_per_group > blocksize * 8) {
1746 "EXT3-fs: #blocks per group too big: %lu\n",
1747 sbi->s_blocks_per_group);
1750 if (sbi->s_frags_per_group > blocksize * 8) {
1752 "EXT3-fs: #fragments per group too big: %lu\n",
1753 sbi->s_frags_per_group);
1756 if (sbi->s_inodes_per_group > blocksize * 8) {
1758 "EXT3-fs: #inodes per group too big: %lu\n",
1759 sbi->s_inodes_per_group);
1763 if (le32_to_cpu(es->s_blocks_count) >
1764 (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) {
1765 printk(KERN_ERR "EXT3-fs: filesystem on %s:"
1766 " too large to mount safely\n", sb->s_id);
1767 if (sizeof(sector_t) < 8)
1768 printk(KERN_WARNING "EXT3-fs: CONFIG_LBD not "
1773 if (EXT3_BLOCKS_PER_GROUP(sb) == 0)
1775 sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
1776 le32_to_cpu(es->s_first_data_block) - 1)
1777 / EXT3_BLOCKS_PER_GROUP(sb)) + 1;
1778 db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) /
1779 EXT3_DESC_PER_BLOCK(sb);
1780 sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
1782 if (sbi->s_group_desc == NULL) {
1783 printk (KERN_ERR "EXT3-fs: not enough memory\n");
1787 bgl_lock_init(&sbi->s_blockgroup_lock);
1789 for (i = 0; i < db_count; i++) {
1790 block = descriptor_loc(sb, logic_sb_block, i);
1791 sbi->s_group_desc[i] = sb_bread(sb, block);
1792 if (!sbi->s_group_desc[i]) {
1793 printk (KERN_ERR "EXT3-fs: "
1794 "can't read group descriptor %d\n", i);
1799 if (!ext3_check_descriptors (sb)) {
1800 printk(KERN_ERR "EXT3-fs: group descriptors corrupted!\n");
1803 sbi->s_gdb_count = db_count;
1804 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1805 spin_lock_init(&sbi->s_next_gen_lock);
1807 err = percpu_counter_init(&sbi->s_freeblocks_counter,
1808 ext3_count_free_blocks(sb));
1810 err = percpu_counter_init(&sbi->s_freeinodes_counter,
1811 ext3_count_free_inodes(sb));
1814 err = percpu_counter_init(&sbi->s_dirs_counter,
1815 ext3_count_dirs(sb));
1818 printk(KERN_ERR "EXT3-fs: insufficient memory\n");
1822 /* per fileystem reservation list head & lock */
1823 spin_lock_init(&sbi->s_rsv_window_lock);
1824 sbi->s_rsv_window_root = RB_ROOT;
1825 /* Add a single, static dummy reservation to the start of the
1826 * reservation window list --- it gives us a placeholder for
1827 * append-at-start-of-list which makes the allocation logic
1828 * _much_ simpler. */
1829 sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1830 sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1831 sbi->s_rsv_window_head.rsv_alloc_hit = 0;
1832 sbi->s_rsv_window_head.rsv_goal_size = 0;
1833 ext3_rsv_window_add(sb, &sbi->s_rsv_window_head);
1836 * set up enough so that it can read an inode
1838 sb->s_op = &ext3_sops;
1839 sb->s_export_op = &ext3_export_ops;
1840 sb->s_xattr = ext3_xattr_handlers;
1842 sb->s_qcop = &ext3_qctl_operations;
1843 sb->dq_op = &ext3_quota_operations;
1845 INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
1849 needs_recovery = (es->s_last_orphan != 0 ||
1850 EXT3_HAS_INCOMPAT_FEATURE(sb,
1851 EXT3_FEATURE_INCOMPAT_RECOVER));
1854 * The first inode we look at is the journal inode. Don't try
1855 * root first: it may be modified in the journal!
1857 if (!test_opt(sb, NOLOAD) &&
1858 EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1859 if (ext3_load_journal(sb, es, journal_devnum))
1861 } else if (journal_inum) {
1862 if (ext3_create_journal(sb, es, journal_inum))
1867 "ext3: No journal on filesystem on %s\n",
1872 /* We have now updated the journal if required, so we can
1873 * validate the data journaling mode. */
1874 switch (test_opt(sb, DATA_FLAGS)) {
1876 /* No mode set, assume a default based on the journal
1877 capabilities: ORDERED_DATA if the journal can
1878 cope, else JOURNAL_DATA */
1879 if (journal_check_available_features
1880 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE))
1881 set_opt(sbi->s_mount_opt, ORDERED_DATA);
1883 set_opt(sbi->s_mount_opt, JOURNAL_DATA);
1886 case EXT3_MOUNT_ORDERED_DATA:
1887 case EXT3_MOUNT_WRITEBACK_DATA:
1888 if (!journal_check_available_features
1889 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) {
1890 printk(KERN_ERR "EXT3-fs: Journal does not support "
1891 "requested data journaling mode\n");
1898 if (test_opt(sb, NOBH)) {
1899 if (!(test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)) {
1900 printk(KERN_WARNING "EXT3-fs: Ignoring nobh option - "
1901 "its supported only with writeback mode\n");
1902 clear_opt(sbi->s_mount_opt, NOBH);
1906 * The journal_load will have done any necessary log recovery,
1907 * so we can safely mount the rest of the filesystem now.
1910 root = ext3_iget(sb, EXT3_ROOT_INO);
1912 printk(KERN_ERR "EXT3-fs: get root inode failed\n");
1913 ret = PTR_ERR(root);
1916 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
1918 printk(KERN_ERR "EXT3-fs: corrupt root inode, run e2fsck\n");
1921 sb->s_root = d_alloc_root(root);
1923 printk(KERN_ERR "EXT3-fs: get root dentry failed\n");
1929 ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
1931 * akpm: core read_super() calls in here with the superblock locked.
1932 * That deadlocks, because orphan cleanup needs to lock the superblock
1933 * in numerous places. Here we just pop the lock - it's relatively
1934 * harmless, because we are now ready to accept write_super() requests,
1935 * and aviro says that's the only reason for hanging onto the
1938 EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS;
1939 ext3_orphan_cleanup(sb, es);
1940 EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS;
1942 printk (KERN_INFO "EXT3-fs: recovery complete.\n");
1943 ext3_mark_recovery_complete(sb, es);
1944 printk (KERN_INFO "EXT3-fs: mounted filesystem with %s data mode.\n",
1945 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal":
1946 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered":
1954 printk(KERN_ERR "VFS: Can't find ext3 filesystem on dev %s.\n",
1959 journal_destroy(sbi->s_journal);
1961 percpu_counter_destroy(&sbi->s_freeblocks_counter);
1962 percpu_counter_destroy(&sbi->s_freeinodes_counter);
1963 percpu_counter_destroy(&sbi->s_dirs_counter);
1965 for (i = 0; i < db_count; i++)
1966 brelse(sbi->s_group_desc[i]);
1967 kfree(sbi->s_group_desc);
1970 for (i = 0; i < MAXQUOTAS; i++)
1971 kfree(sbi->s_qf_names[i]);
1973 ext3_blkdev_remove(sbi);
1976 sb->s_fs_info = NULL;
1983 * Setup any per-fs journal parameters now. We'll do this both on
1984 * initial mount, once the journal has been initialised but before we've
1985 * done any recovery; and again on any subsequent remount.
1987 static void ext3_init_journal_params(struct super_block *sb, journal_t *journal)
1989 struct ext3_sb_info *sbi = EXT3_SB(sb);
1991 if (sbi->s_commit_interval)
1992 journal->j_commit_interval = sbi->s_commit_interval;
1993 /* We could also set up an ext3-specific default for the commit
1994 * interval here, but for now we'll just fall back to the jbd
1997 spin_lock(&journal->j_state_lock);
1998 if (test_opt(sb, BARRIER))
1999 journal->j_flags |= JFS_BARRIER;
2001 journal->j_flags &= ~JFS_BARRIER;
2002 if (test_opt(sb, DATA_ERR_ABORT))
2003 journal->j_flags |= JFS_ABORT_ON_SYNCDATA_ERR;
2005 journal->j_flags &= ~JFS_ABORT_ON_SYNCDATA_ERR;
2006 spin_unlock(&journal->j_state_lock);
2009 static journal_t *ext3_get_journal(struct super_block *sb,
2010 unsigned int journal_inum)
2012 struct inode *journal_inode;
2015 /* First, test for the existence of a valid inode on disk. Bad
2016 * things happen if we iget() an unused inode, as the subsequent
2017 * iput() will try to delete it. */
2019 journal_inode = ext3_iget(sb, journal_inum);
2020 if (IS_ERR(journal_inode)) {
2021 printk(KERN_ERR "EXT3-fs: no journal found.\n");
2024 if (!journal_inode->i_nlink) {
2025 make_bad_inode(journal_inode);
2026 iput(journal_inode);
2027 printk(KERN_ERR "EXT3-fs: journal inode is deleted.\n");
2031 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2032 journal_inode, journal_inode->i_size);
2033 if (!S_ISREG(journal_inode->i_mode)) {
2034 printk(KERN_ERR "EXT3-fs: invalid journal inode.\n");
2035 iput(journal_inode);
2039 journal = journal_init_inode(journal_inode);
2041 printk(KERN_ERR "EXT3-fs: Could not load journal inode\n");
2042 iput(journal_inode);
2045 journal->j_private = sb;
2046 ext3_init_journal_params(sb, journal);
2050 static journal_t *ext3_get_dev_journal(struct super_block *sb,
2053 struct buffer_head * bh;
2057 int hblock, blocksize;
2058 ext3_fsblk_t sb_block;
2059 unsigned long offset;
2060 struct ext3_super_block * es;
2061 struct block_device *bdev;
2063 bdev = ext3_blkdev_get(j_dev);
2067 if (bd_claim(bdev, sb)) {
2069 "EXT3: failed to claim external journal device.\n");
2070 blkdev_put(bdev, FMODE_READ|FMODE_WRITE);
2074 blocksize = sb->s_blocksize;
2075 hblock = bdev_hardsect_size(bdev);
2076 if (blocksize < hblock) {
2078 "EXT3-fs: blocksize too small for journal device.\n");
2082 sb_block = EXT3_MIN_BLOCK_SIZE / blocksize;
2083 offset = EXT3_MIN_BLOCK_SIZE % blocksize;
2084 set_blocksize(bdev, blocksize);
2085 if (!(bh = __bread(bdev, sb_block, blocksize))) {
2086 printk(KERN_ERR "EXT3-fs: couldn't read superblock of "
2087 "external journal\n");
2091 es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
2092 if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) ||
2093 !(le32_to_cpu(es->s_feature_incompat) &
2094 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
2095 printk(KERN_ERR "EXT3-fs: external journal has "
2096 "bad superblock\n");
2101 if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
2102 printk(KERN_ERR "EXT3-fs: journal UUID does not match\n");
2107 len = le32_to_cpu(es->s_blocks_count);
2108 start = sb_block + 1;
2109 brelse(bh); /* we're done with the superblock */
2111 journal = journal_init_dev(bdev, sb->s_bdev,
2112 start, len, blocksize);
2114 printk(KERN_ERR "EXT3-fs: failed to create device journal\n");
2117 journal->j_private = sb;
2118 ll_rw_block(READ, 1, &journal->j_sb_buffer);
2119 wait_on_buffer(journal->j_sb_buffer);
2120 if (!buffer_uptodate(journal->j_sb_buffer)) {
2121 printk(KERN_ERR "EXT3-fs: I/O error on journal device\n");
2124 if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {
2125 printk(KERN_ERR "EXT3-fs: External journal has more than one "
2126 "user (unsupported) - %d\n",
2127 be32_to_cpu(journal->j_superblock->s_nr_users));
2130 EXT3_SB(sb)->journal_bdev = bdev;
2131 ext3_init_journal_params(sb, journal);
2134 journal_destroy(journal);
2136 ext3_blkdev_put(bdev);
2140 static int ext3_load_journal(struct super_block *sb,
2141 struct ext3_super_block *es,
2142 unsigned long journal_devnum)
2145 unsigned int journal_inum = le32_to_cpu(es->s_journal_inum);
2148 int really_read_only;
2150 if (journal_devnum &&
2151 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2152 printk(KERN_INFO "EXT3-fs: external journal device major/minor "
2153 "numbers have changed\n");
2154 journal_dev = new_decode_dev(journal_devnum);
2156 journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));
2158 really_read_only = bdev_read_only(sb->s_bdev);
2161 * Are we loading a blank journal or performing recovery after a
2162 * crash? For recovery, we need to check in advance whether we
2163 * can get read-write access to the device.
2166 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) {
2167 if (sb->s_flags & MS_RDONLY) {
2168 printk(KERN_INFO "EXT3-fs: INFO: recovery "
2169 "required on readonly filesystem.\n");
2170 if (really_read_only) {
2171 printk(KERN_ERR "EXT3-fs: write access "
2172 "unavailable, cannot proceed.\n");
2175 printk (KERN_INFO "EXT3-fs: write access will "
2176 "be enabled during recovery.\n");
2180 if (journal_inum && journal_dev) {
2181 printk(KERN_ERR "EXT3-fs: filesystem has both journal "
2182 "and inode journals!\n");
2187 if (!(journal = ext3_get_journal(sb, journal_inum)))
2190 if (!(journal = ext3_get_dev_journal(sb, journal_dev)))
2194 if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) {
2195 err = journal_update_format(journal);
2197 printk(KERN_ERR "EXT3-fs: error updating journal.\n");
2198 journal_destroy(journal);
2203 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER))
2204 err = journal_wipe(journal, !really_read_only);
2206 err = journal_load(journal);
2209 printk(KERN_ERR "EXT3-fs: error loading journal.\n");
2210 journal_destroy(journal);
2214 EXT3_SB(sb)->s_journal = journal;
2215 ext3_clear_journal_err(sb, es);
2217 if (journal_devnum &&
2218 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2219 es->s_journal_dev = cpu_to_le32(journal_devnum);
2222 /* Make sure we flush the recovery flag to disk. */
2223 ext3_commit_super(sb, es, 1);
2229 static int ext3_create_journal(struct super_block * sb,
2230 struct ext3_super_block * es,
2231 unsigned int journal_inum)
2236 if (sb->s_flags & MS_RDONLY) {
2237 printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to "
2238 "create journal.\n");
2242 journal = ext3_get_journal(sb, journal_inum);
2246 printk(KERN_INFO "EXT3-fs: creating new journal on inode %u\n",
2249 err = journal_create(journal);
2251 printk(KERN_ERR "EXT3-fs: error creating journal.\n");
2252 journal_destroy(journal);
2256 EXT3_SB(sb)->s_journal = journal;
2258 ext3_update_dynamic_rev(sb);
2259 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2260 EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL);
2262 es->s_journal_inum = cpu_to_le32(journal_inum);
2265 /* Make sure we flush the recovery flag to disk. */
2266 ext3_commit_super(sb, es, 1);
2271 static void ext3_commit_super (struct super_block * sb,
2272 struct ext3_super_block * es,
2275 struct buffer_head *sbh = EXT3_SB(sb)->s_sbh;
2279 es->s_wtime = cpu_to_le32(get_seconds());
2280 es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb));
2281 es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb));
2282 BUFFER_TRACE(sbh, "marking dirty");
2283 mark_buffer_dirty(sbh);
2285 sync_dirty_buffer(sbh);
2290 * Have we just finished recovery? If so, and if we are mounting (or
2291 * remounting) the filesystem readonly, then we will end up with a
2292 * consistent fs on disk. Record that fact.
2294 static void ext3_mark_recovery_complete(struct super_block * sb,
2295 struct ext3_super_block * es)
2297 journal_t *journal = EXT3_SB(sb)->s_journal;
2299 journal_lock_updates(journal);
2300 if (journal_flush(journal) < 0)
2304 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) &&
2305 sb->s_flags & MS_RDONLY) {
2306 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2308 ext3_commit_super(sb, es, 1);
2313 journal_unlock_updates(journal);
2317 * If we are mounting (or read-write remounting) a filesystem whose journal
2318 * has recorded an error from a previous lifetime, move that error to the
2319 * main filesystem now.
2321 static void ext3_clear_journal_err(struct super_block * sb,
2322 struct ext3_super_block * es)
2328 journal = EXT3_SB(sb)->s_journal;
2331 * Now check for any error status which may have been recorded in the
2332 * journal by a prior ext3_error() or ext3_abort()
2335 j_errno = journal_errno(journal);
2339 errstr = ext3_decode_error(sb, j_errno, nbuf);
2340 ext3_warning(sb, __func__, "Filesystem error recorded "
2341 "from previous mount: %s", errstr);
2342 ext3_warning(sb, __func__, "Marking fs in need of "
2343 "filesystem check.");
2345 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
2346 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
2347 ext3_commit_super (sb, es, 1);
2349 journal_clear_err(journal);
2354 * Force the running and committing transactions to commit,
2355 * and wait on the commit.
2357 int ext3_force_commit(struct super_block *sb)
2362 if (sb->s_flags & MS_RDONLY)
2365 journal = EXT3_SB(sb)->s_journal;
2367 ret = ext3_journal_force_commit(journal);
2372 * Ext3 always journals updates to the superblock itself, so we don't
2373 * have to propagate any other updates to the superblock on disk at this
2374 * point. Just start an async writeback to get the buffers on their way
2377 * This implicitly triggers the writebehind on sync().
2380 static void ext3_write_super (struct super_block * sb)
2382 if (mutex_trylock(&sb->s_lock) != 0)
2387 static int ext3_sync_fs(struct super_block *sb, int wait)
2392 if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) {
2394 log_wait_commit(EXT3_SB(sb)->s_journal, target);
2400 * LVM calls this function before a (read-only) snapshot is created. This
2401 * gives us a chance to flush the journal completely and mark the fs clean.
2403 static void ext3_write_super_lockfs(struct super_block *sb)
2407 if (!(sb->s_flags & MS_RDONLY)) {
2408 journal_t *journal = EXT3_SB(sb)->s_journal;
2410 /* Now we set up the journal barrier. */
2411 journal_lock_updates(journal);
2414 * We don't want to clear needs_recovery flag when we failed
2415 * to flush the journal.
2417 if (journal_flush(journal) < 0)
2420 /* Journal blocked and flushed, clear needs_recovery flag. */
2421 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2422 ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2427 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2428 * flag here, even though the filesystem is not technically dirty yet.
2430 static void ext3_unlockfs(struct super_block *sb)
2432 if (!(sb->s_flags & MS_RDONLY)) {
2434 /* Reser the needs_recovery flag before the fs is unlocked. */
2435 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2436 ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2438 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2442 static int ext3_remount (struct super_block * sb, int * flags, char * data)
2444 struct ext3_super_block * es;
2445 struct ext3_sb_info *sbi = EXT3_SB(sb);
2446 ext3_fsblk_t n_blocks_count = 0;
2447 unsigned long old_sb_flags;
2448 struct ext3_mount_options old_opts;
2454 /* Store the original options */
2455 old_sb_flags = sb->s_flags;
2456 old_opts.s_mount_opt = sbi->s_mount_opt;
2457 old_opts.s_resuid = sbi->s_resuid;
2458 old_opts.s_resgid = sbi->s_resgid;
2459 old_opts.s_commit_interval = sbi->s_commit_interval;
2461 old_opts.s_jquota_fmt = sbi->s_jquota_fmt;
2462 for (i = 0; i < MAXQUOTAS; i++)
2463 old_opts.s_qf_names[i] = sbi->s_qf_names[i];
2467 * Allow the "check" option to be passed as a remount option.
2469 if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) {
2474 if (sbi->s_mount_opt & EXT3_MOUNT_ABORT)
2475 ext3_abort(sb, __func__, "Abort forced by user");
2477 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
2478 ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
2482 ext3_init_journal_params(sb, sbi->s_journal);
2484 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) ||
2485 n_blocks_count > le32_to_cpu(es->s_blocks_count)) {
2486 if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) {
2491 if (*flags & MS_RDONLY) {
2493 * First of all, the unconditional stuff we have to do
2494 * to disable replay of the journal when we next remount
2496 sb->s_flags |= MS_RDONLY;
2499 * OK, test if we are remounting a valid rw partition
2500 * readonly, and if so set the rdonly flag and then
2501 * mark the partition as valid again.
2503 if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) &&
2504 (sbi->s_mount_state & EXT3_VALID_FS))
2505 es->s_state = cpu_to_le16(sbi->s_mount_state);
2508 * We have to unlock super so that we can wait for
2512 ext3_mark_recovery_complete(sb, es);
2516 if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb,
2517 ~EXT3_FEATURE_RO_COMPAT_SUPP))) {
2518 printk(KERN_WARNING "EXT3-fs: %s: couldn't "
2519 "remount RDWR because of unsupported "
2520 "optional features (%x).\n",
2521 sb->s_id, le32_to_cpu(ret));
2527 * If we have an unprocessed orphan list hanging
2528 * around from a previously readonly bdev mount,
2529 * require a full umount/remount for now.
2531 if (es->s_last_orphan) {
2532 printk(KERN_WARNING "EXT3-fs: %s: couldn't "
2533 "remount RDWR because of unprocessed "
2534 "orphan inode list. Please "
2535 "umount/remount instead.\n",
2542 * Mounting a RDONLY partition read-write, so reread
2543 * and store the current valid flag. (It may have
2544 * been changed by e2fsck since we originally mounted
2547 ext3_clear_journal_err(sb, es);
2548 sbi->s_mount_state = le16_to_cpu(es->s_state);
2549 if ((err = ext3_group_extend(sb, es, n_blocks_count)))
2551 if (!ext3_setup_super (sb, es, 0))
2552 sb->s_flags &= ~MS_RDONLY;
2556 /* Release old quota file names */
2557 for (i = 0; i < MAXQUOTAS; i++)
2558 if (old_opts.s_qf_names[i] &&
2559 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2560 kfree(old_opts.s_qf_names[i]);
2564 sb->s_flags = old_sb_flags;
2565 sbi->s_mount_opt = old_opts.s_mount_opt;
2566 sbi->s_resuid = old_opts.s_resuid;
2567 sbi->s_resgid = old_opts.s_resgid;
2568 sbi->s_commit_interval = old_opts.s_commit_interval;
2570 sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
2571 for (i = 0; i < MAXQUOTAS; i++) {
2572 if (sbi->s_qf_names[i] &&
2573 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2574 kfree(sbi->s_qf_names[i]);
2575 sbi->s_qf_names[i] = old_opts.s_qf_names[i];
2581 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
2583 struct super_block *sb = dentry->d_sb;
2584 struct ext3_sb_info *sbi = EXT3_SB(sb);
2585 struct ext3_super_block *es = sbi->s_es;
2588 if (test_opt(sb, MINIX_DF)) {
2589 sbi->s_overhead_last = 0;
2590 } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
2591 unsigned long ngroups = sbi->s_groups_count, i;
2592 ext3_fsblk_t overhead = 0;
2596 * Compute the overhead (FS structures). This is constant
2597 * for a given filesystem unless the number of block groups
2598 * changes so we cache the previous value until it does.
2602 * All of the blocks before first_data_block are
2605 overhead = le32_to_cpu(es->s_first_data_block);
2608 * Add the overhead attributed to the superblock and
2609 * block group descriptors. If the sparse superblocks
2610 * feature is turned on, then not all groups have this.
2612 for (i = 0; i < ngroups; i++) {
2613 overhead += ext3_bg_has_super(sb, i) +
2614 ext3_bg_num_gdb(sb, i);
2619 * Every block group has an inode bitmap, a block
2620 * bitmap, and an inode table.
2622 overhead += ngroups * (2 + sbi->s_itb_per_group);
2623 sbi->s_overhead_last = overhead;
2625 sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
2628 buf->f_type = EXT3_SUPER_MAGIC;
2629 buf->f_bsize = sb->s_blocksize;
2630 buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last;
2631 buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter);
2632 es->s_free_blocks_count = cpu_to_le32(buf->f_bfree);
2633 buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
2634 if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
2636 buf->f_files = le32_to_cpu(es->s_inodes_count);
2637 buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);
2638 es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
2639 buf->f_namelen = EXT3_NAME_LEN;
2640 fsid = le64_to_cpup((void *)es->s_uuid) ^
2641 le64_to_cpup((void *)es->s_uuid + sizeof(u64));
2642 buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
2643 buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
2647 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2648 * is locked for write. Otherwise the are possible deadlocks:
2649 * Process 1 Process 2
2650 * ext3_create() quota_sync()
2651 * journal_start() write_dquot()
2652 * DQUOT_INIT() down(dqio_mutex)
2653 * down(dqio_mutex) journal_start()
2659 static inline struct inode *dquot_to_inode(struct dquot *dquot)
2661 return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
2664 static int ext3_dquot_initialize(struct inode *inode, int type)
2669 /* We may create quota structure so we need to reserve enough blocks */
2670 handle = ext3_journal_start(inode, 2*EXT3_QUOTA_INIT_BLOCKS(inode->i_sb));
2672 return PTR_ERR(handle);
2673 ret = dquot_initialize(inode, type);
2674 err = ext3_journal_stop(handle);
2680 static int ext3_dquot_drop(struct inode *inode)
2685 /* We may delete quota structure so we need to reserve enough blocks */
2686 handle = ext3_journal_start(inode, 2*EXT3_QUOTA_DEL_BLOCKS(inode->i_sb));
2687 if (IS_ERR(handle)) {
2689 * We call dquot_drop() anyway to at least release references
2690 * to quota structures so that umount does not hang.
2693 return PTR_ERR(handle);
2695 ret = dquot_drop(inode);
2696 err = ext3_journal_stop(handle);
2702 static int ext3_write_dquot(struct dquot *dquot)
2706 struct inode *inode;
2708 inode = dquot_to_inode(dquot);
2709 handle = ext3_journal_start(inode,
2710 EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2712 return PTR_ERR(handle);
2713 ret = dquot_commit(dquot);
2714 err = ext3_journal_stop(handle);
2720 static int ext3_acquire_dquot(struct dquot *dquot)
2725 handle = ext3_journal_start(dquot_to_inode(dquot),
2726 EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2728 return PTR_ERR(handle);
2729 ret = dquot_acquire(dquot);
2730 err = ext3_journal_stop(handle);
2736 static int ext3_release_dquot(struct dquot *dquot)
2741 handle = ext3_journal_start(dquot_to_inode(dquot),
2742 EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2743 if (IS_ERR(handle)) {
2744 /* Release dquot anyway to avoid endless cycle in dqput() */
2745 dquot_release(dquot);
2746 return PTR_ERR(handle);
2748 ret = dquot_release(dquot);
2749 err = ext3_journal_stop(handle);
2755 static int ext3_mark_dquot_dirty(struct dquot *dquot)
2757 /* Are we journaling quotas? */
2758 if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2759 EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2760 dquot_mark_dquot_dirty(dquot);
2761 return ext3_write_dquot(dquot);
2763 return dquot_mark_dquot_dirty(dquot);
2767 static int ext3_write_info(struct super_block *sb, int type)
2772 /* Data block + inode block */
2773 handle = ext3_journal_start(sb->s_root->d_inode, 2);
2775 return PTR_ERR(handle);
2776 ret = dquot_commit_info(sb, type);
2777 err = ext3_journal_stop(handle);
2784 * Turn on quotas during mount time - we need to find
2785 * the quota file and such...
2787 static int ext3_quota_on_mount(struct super_block *sb, int type)
2789 return vfs_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type],
2790 EXT3_SB(sb)->s_jquota_fmt, type);
2794 * Standard function to be called on quota_on
2796 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
2797 char *name, int remount)
2802 if (!test_opt(sb, QUOTA))
2804 /* When remounting, no checks are needed and in fact, name is NULL */
2806 return vfs_quota_on(sb, type, format_id, name, remount);
2808 err = kern_path(name, LOOKUP_FOLLOW, &path);
2812 /* Quotafile not on the same filesystem? */
2813 if (path.mnt->mnt_sb != sb) {
2817 /* Journaling quota? */
2818 if (EXT3_SB(sb)->s_qf_names[type]) {
2819 /* Quotafile not of fs root? */
2820 if (path.dentry->d_parent != sb->s_root)
2822 "EXT3-fs: Quota file not on filesystem root. "
2823 "Journaled quota will not work.\n");
2827 * When we journal data on quota file, we have to flush journal to see
2828 * all updates to the file when we bypass pagecache...
2830 if (ext3_should_journal_data(path.dentry->d_inode)) {
2832 * We don't need to lock updates but journal_flush() could
2833 * otherwise be livelocked...
2835 journal_lock_updates(EXT3_SB(sb)->s_journal);
2836 err = journal_flush(EXT3_SB(sb)->s_journal);
2837 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2844 err = vfs_quota_on_path(sb, type, format_id, &path);
2849 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2850 * acquiring the locks... As quota files are never truncated and quota code
2851 * itself serializes the operations (and noone else should touch the files)
2852 * we don't have to be afraid of races */
2853 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
2854 size_t len, loff_t off)
2856 struct inode *inode = sb_dqopt(sb)->files[type];
2857 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2859 int offset = off & (sb->s_blocksize - 1);
2862 struct buffer_head *bh;
2863 loff_t i_size = i_size_read(inode);
2867 if (off+len > i_size)
2870 while (toread > 0) {
2871 tocopy = sb->s_blocksize - offset < toread ?
2872 sb->s_blocksize - offset : toread;
2873 bh = ext3_bread(NULL, inode, blk, 0, &err);
2876 if (!bh) /* A hole? */
2877 memset(data, 0, tocopy);
2879 memcpy(data, bh->b_data+offset, tocopy);
2889 /* Write to quotafile (we know the transaction is already started and has
2890 * enough credits) */
2891 static ssize_t ext3_quota_write(struct super_block *sb, int type,
2892 const char *data, size_t len, loff_t off)
2894 struct inode *inode = sb_dqopt(sb)->files[type];
2895 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2897 int offset = off & (sb->s_blocksize - 1);
2899 int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL;
2900 size_t towrite = len;
2901 struct buffer_head *bh;
2902 handle_t *handle = journal_current_handle();
2905 printk(KERN_WARNING "EXT3-fs: Quota write (off=%Lu, len=%Lu)"
2906 " cancelled because transaction is not started.\n",
2907 (unsigned long long)off, (unsigned long long)len);
2910 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2911 while (towrite > 0) {
2912 tocopy = sb->s_blocksize - offset < towrite ?
2913 sb->s_blocksize - offset : towrite;
2914 bh = ext3_bread(handle, inode, blk, 1, &err);
2917 if (journal_quota) {
2918 err = ext3_journal_get_write_access(handle, bh);
2925 memcpy(bh->b_data+offset, data, tocopy);
2926 flush_dcache_page(bh->b_page);
2929 err = ext3_journal_dirty_metadata(handle, bh);
2931 /* Always do at least ordered writes for quotas */
2932 err = ext3_journal_dirty_data(handle, bh);
2933 mark_buffer_dirty(bh);
2944 if (len == towrite) {
2945 mutex_unlock(&inode->i_mutex);
2948 if (inode->i_size < off+len-towrite) {
2949 i_size_write(inode, off+len-towrite);
2950 EXT3_I(inode)->i_disksize = inode->i_size;
2953 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2954 ext3_mark_inode_dirty(handle, inode);
2955 mutex_unlock(&inode->i_mutex);
2956 return len - towrite;
2961 static int ext3_get_sb(struct file_system_type *fs_type,
2962 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
2964 return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super, mnt);
2967 static struct file_system_type ext3_fs_type = {
2968 .owner = THIS_MODULE,
2970 .get_sb = ext3_get_sb,
2971 .kill_sb = kill_block_super,
2972 .fs_flags = FS_REQUIRES_DEV,
2975 static int __init init_ext3_fs(void)
2977 int err = init_ext3_xattr();
2980 err = init_inodecache();
2983 err = register_filesystem(&ext3_fs_type);
2988 destroy_inodecache();
2994 static void __exit exit_ext3_fs(void)
2996 unregister_filesystem(&ext3_fs_type);
2997 destroy_inodecache();
3001 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3002 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3003 MODULE_LICENSE("GPL");
3004 module_init(init_ext3_fs)
3005 module_exit(exit_ext3_fs)