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/buffer_head.h>
31 #include <linux/exportfs.h>
32 #include <linux/vfs.h>
33 #include <linux/random.h>
34 #include <linux/mount.h>
35 #include <linux/namei.h>
36 #include <linux/quotaops.h>
37 #include <linux/seq_file.h>
38 #include <linux/log2.h>
40 #include <asm/uaccess.h>
46 #ifdef CONFIG_EXT3_DEFAULTS_TO_ORDERED
47 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_ORDERED_DATA
49 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_WRITEBACK_DATA
52 static int ext3_load_journal(struct super_block *, struct ext3_super_block *,
53 unsigned long journal_devnum);
54 static int ext3_create_journal(struct super_block *, struct ext3_super_block *,
56 static int ext3_commit_super(struct super_block *sb,
57 struct ext3_super_block *es,
59 static void ext3_mark_recovery_complete(struct super_block * sb,
60 struct ext3_super_block * es);
61 static void ext3_clear_journal_err(struct super_block * sb,
62 struct ext3_super_block * es);
63 static int ext3_sync_fs(struct super_block *sb, int wait);
64 static const char *ext3_decode_error(struct super_block * sb, int errno,
66 static int ext3_remount (struct super_block * sb, int * flags, char * data);
67 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf);
68 static int ext3_unfreeze(struct super_block *sb);
69 static int ext3_freeze(struct super_block *sb);
72 * Wrappers for journal_start/end.
74 * The only special thing we need to do here is to make sure that all
75 * journal_end calls result in the superblock being marked dirty, so
76 * that sync() will call the filesystem's write_super callback if
79 handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
83 if (sb->s_flags & MS_RDONLY)
84 return ERR_PTR(-EROFS);
86 /* Special case here: if the journal has aborted behind our
87 * backs (eg. EIO in the commit thread), then we still need to
88 * take the FS itself readonly cleanly. */
89 journal = EXT3_SB(sb)->s_journal;
90 if (is_journal_aborted(journal)) {
91 ext3_abort(sb, __func__,
92 "Detected aborted journal");
93 return ERR_PTR(-EROFS);
96 return journal_start(journal, nblocks);
100 * The only special thing we need to do here is to make sure that all
101 * journal_stop calls result in the superblock being marked dirty, so
102 * that sync() will call the filesystem's write_super callback if
105 int __ext3_journal_stop(const char *where, handle_t *handle)
107 struct super_block *sb;
111 sb = handle->h_transaction->t_journal->j_private;
113 rc = journal_stop(handle);
118 __ext3_std_error(sb, where, err);
122 void ext3_journal_abort_handle(const char *caller, const char *err_fn,
123 struct buffer_head *bh, handle_t *handle, int err)
126 const char *errstr = ext3_decode_error(NULL, err, nbuf);
129 BUFFER_TRACE(bh, "abort");
134 if (is_handle_aborted(handle))
137 printk(KERN_ERR "EXT3-fs: %s: aborting transaction: %s in %s\n",
138 caller, errstr, err_fn);
140 journal_abort_handle(handle);
143 void ext3_msg(struct super_block *sb, const char *prefix,
144 const char *fmt, ...)
149 printk("%sEXT3-fs (%s): ", prefix, sb->s_id);
155 /* Deal with the reporting of failure conditions on a filesystem such as
156 * inconsistencies detected or read IO failures.
158 * On ext2, we can store the error state of the filesystem in the
159 * superblock. That is not possible on ext3, because we may have other
160 * write ordering constraints on the superblock which prevent us from
161 * writing it out straight away; and given that the journal is about to
162 * be aborted, we can't rely on the current, or future, transactions to
163 * write out the superblock safely.
165 * We'll just use the journal_abort() error code to record an error in
166 * the journal instead. On recovery, the journal will complain about
167 * that error until we've noted it down and cleared it.
170 static void ext3_handle_error(struct super_block *sb)
172 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
174 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
175 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
177 if (sb->s_flags & MS_RDONLY)
180 if (!test_opt (sb, ERRORS_CONT)) {
181 journal_t *journal = EXT3_SB(sb)->s_journal;
183 set_opt(EXT3_SB(sb)->s_mount_opt, ABORT);
185 journal_abort(journal, -EIO);
187 if (test_opt (sb, ERRORS_RO)) {
188 ext3_msg(sb, KERN_CRIT,
189 "error: remounting filesystem read-only");
190 sb->s_flags |= MS_RDONLY;
192 ext3_commit_super(sb, es, 1);
193 if (test_opt(sb, ERRORS_PANIC))
194 panic("EXT3-fs (%s): panic forced after error\n",
198 void ext3_error (struct super_block * sb, const char * function,
199 const char * fmt, ...)
204 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
209 ext3_handle_error(sb);
212 static const char *ext3_decode_error(struct super_block * sb, int errno,
219 errstr = "IO failure";
222 errstr = "Out of memory";
225 if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT)
226 errstr = "Journal has aborted";
228 errstr = "Readonly filesystem";
231 /* If the caller passed in an extra buffer for unknown
232 * errors, textualise them now. Else we just return
235 /* Check for truncated error codes... */
236 if (snprintf(nbuf, 16, "error %d", -errno) >= 0)
245 /* __ext3_std_error decodes expected errors from journaling functions
246 * automatically and invokes the appropriate error response. */
248 void __ext3_std_error (struct super_block * sb, const char * function,
254 /* Special case: if the error is EROFS, and we're not already
255 * inside a transaction, then there's really no point in logging
257 if (errno == -EROFS && journal_current_handle() == NULL &&
258 (sb->s_flags & MS_RDONLY))
261 errstr = ext3_decode_error(sb, errno, nbuf);
262 ext3_msg(sb, KERN_CRIT, "error in %s: %s", function, errstr);
264 ext3_handle_error(sb);
268 * ext3_abort is a much stronger failure handler than ext3_error. The
269 * abort function may be used to deal with unrecoverable failures such
270 * as journal IO errors or ENOMEM at a critical moment in log management.
272 * We unconditionally force the filesystem into an ABORT|READONLY state,
273 * unless the error response on the fs has been set to panic in which
274 * case we take the easy way out and panic immediately.
277 void ext3_abort (struct super_block * sb, const char * function,
278 const char * fmt, ...)
283 printk(KERN_CRIT "EXT3-fs (%s): error: %s: ", sb->s_id, function);
288 if (test_opt(sb, ERRORS_PANIC))
289 panic("EXT3-fs: panic from previous error\n");
291 if (sb->s_flags & MS_RDONLY)
294 ext3_msg(sb, KERN_CRIT,
295 "error: remounting filesystem read-only");
296 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
297 sb->s_flags |= MS_RDONLY;
298 set_opt(EXT3_SB(sb)->s_mount_opt, ABORT);
299 if (EXT3_SB(sb)->s_journal)
300 journal_abort(EXT3_SB(sb)->s_journal, -EIO);
303 void ext3_warning (struct super_block * sb, const char * function,
304 const char * fmt, ...)
309 printk(KERN_WARNING "EXT3-fs (%s): warning: %s: ",
316 void ext3_update_dynamic_rev(struct super_block *sb)
318 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
320 if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV)
323 ext3_msg(sb, KERN_WARNING,
324 "warning: updating to rev %d because of "
325 "new feature flag, running e2fsck is recommended",
328 es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO);
329 es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE);
330 es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV);
331 /* leave es->s_feature_*compat flags alone */
332 /* es->s_uuid will be set by e2fsck if empty */
335 * The rest of the superblock fields should be zero, and if not it
336 * means they are likely already in use, so leave them alone. We
337 * can leave it up to e2fsck to clean up any inconsistencies there.
342 * Open the external journal device
344 static struct block_device *ext3_blkdev_get(dev_t dev, struct super_block *sb)
346 struct block_device *bdev;
347 char b[BDEVNAME_SIZE];
349 bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE);
355 ext3_msg(sb, "error: failed to open journal device %s: %ld",
356 __bdevname(dev, b), PTR_ERR(bdev));
362 * Release the journal device
364 static int ext3_blkdev_put(struct block_device *bdev)
367 return blkdev_put(bdev, FMODE_READ|FMODE_WRITE);
370 static int ext3_blkdev_remove(struct ext3_sb_info *sbi)
372 struct block_device *bdev;
375 bdev = sbi->journal_bdev;
377 ret = ext3_blkdev_put(bdev);
378 sbi->journal_bdev = NULL;
383 static inline struct inode *orphan_list_entry(struct list_head *l)
385 return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode;
388 static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
392 ext3_msg(sb, KERN_ERR, "error: sb orphan head is %d",
393 le32_to_cpu(sbi->s_es->s_last_orphan));
395 ext3_msg(sb, KERN_ERR, "sb_info orphan list:");
396 list_for_each(l, &sbi->s_orphan) {
397 struct inode *inode = orphan_list_entry(l);
398 ext3_msg(sb, KERN_ERR, " "
399 "inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
400 inode->i_sb->s_id, inode->i_ino, inode,
401 inode->i_mode, inode->i_nlink,
406 static void ext3_put_super (struct super_block * sb)
408 struct ext3_sb_info *sbi = EXT3_SB(sb);
409 struct ext3_super_block *es = sbi->s_es;
412 dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
413 ext3_xattr_put_super(sb);
414 err = journal_destroy(sbi->s_journal);
415 sbi->s_journal = NULL;
417 ext3_abort(sb, __func__, "Couldn't clean up the journal");
419 if (!(sb->s_flags & MS_RDONLY)) {
420 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
421 es->s_state = cpu_to_le16(sbi->s_mount_state);
422 BUFFER_TRACE(sbi->s_sbh, "marking dirty");
423 mark_buffer_dirty(sbi->s_sbh);
424 ext3_commit_super(sb, es, 1);
427 for (i = 0; i < sbi->s_gdb_count; i++)
428 brelse(sbi->s_group_desc[i]);
429 kfree(sbi->s_group_desc);
430 percpu_counter_destroy(&sbi->s_freeblocks_counter);
431 percpu_counter_destroy(&sbi->s_freeinodes_counter);
432 percpu_counter_destroy(&sbi->s_dirs_counter);
435 for (i = 0; i < MAXQUOTAS; i++)
436 kfree(sbi->s_qf_names[i]);
439 /* Debugging code just in case the in-memory inode orphan list
440 * isn't empty. The on-disk one can be non-empty if we've
441 * detected an error and taken the fs readonly, but the
442 * in-memory list had better be clean by this point. */
443 if (!list_empty(&sbi->s_orphan))
444 dump_orphan_list(sb, sbi);
445 J_ASSERT(list_empty(&sbi->s_orphan));
447 invalidate_bdev(sb->s_bdev);
448 if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) {
450 * Invalidate the journal device's buffers. We don't want them
451 * floating about in memory - the physical journal device may
452 * hotswapped, and it breaks the `ro-after' testing code.
454 sync_blockdev(sbi->journal_bdev);
455 invalidate_bdev(sbi->journal_bdev);
456 ext3_blkdev_remove(sbi);
458 sb->s_fs_info = NULL;
459 kfree(sbi->s_blockgroup_lock);
463 static struct kmem_cache *ext3_inode_cachep;
466 * Called inside transaction, so use GFP_NOFS
468 static struct inode *ext3_alloc_inode(struct super_block *sb)
470 struct ext3_inode_info *ei;
472 ei = kmem_cache_alloc(ext3_inode_cachep, GFP_NOFS);
475 ei->i_block_alloc_info = NULL;
476 ei->vfs_inode.i_version = 1;
477 atomic_set(&ei->i_datasync_tid, 0);
478 atomic_set(&ei->i_sync_tid, 0);
479 return &ei->vfs_inode;
482 static void ext3_i_callback(struct rcu_head *head)
484 struct inode *inode = container_of(head, struct inode, i_rcu);
485 INIT_LIST_HEAD(&inode->i_dentry);
486 kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
489 static void ext3_destroy_inode(struct inode *inode)
491 if (!list_empty(&(EXT3_I(inode)->i_orphan))) {
492 printk("EXT3 Inode %p: orphan list check failed!\n",
494 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4,
495 EXT3_I(inode), sizeof(struct ext3_inode_info),
499 call_rcu(&inode->i_rcu, ext3_i_callback);
502 static void init_once(void *foo)
504 struct ext3_inode_info *ei = (struct ext3_inode_info *) foo;
506 INIT_LIST_HEAD(&ei->i_orphan);
507 #ifdef CONFIG_EXT3_FS_XATTR
508 init_rwsem(&ei->xattr_sem);
510 mutex_init(&ei->truncate_mutex);
511 inode_init_once(&ei->vfs_inode);
514 static int init_inodecache(void)
516 ext3_inode_cachep = kmem_cache_create("ext3_inode_cache",
517 sizeof(struct ext3_inode_info),
518 0, (SLAB_RECLAIM_ACCOUNT|
521 if (ext3_inode_cachep == NULL)
526 static void destroy_inodecache(void)
528 kmem_cache_destroy(ext3_inode_cachep);
531 static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb)
533 #if defined(CONFIG_QUOTA)
534 struct ext3_sb_info *sbi = EXT3_SB(sb);
536 if (sbi->s_jquota_fmt) {
539 switch (sbi->s_jquota_fmt) {
550 seq_printf(seq, ",jqfmt=%s", fmtname);
553 if (sbi->s_qf_names[USRQUOTA])
554 seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]);
556 if (sbi->s_qf_names[GRPQUOTA])
557 seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]);
559 if (test_opt(sb, USRQUOTA))
560 seq_puts(seq, ",usrquota");
562 if (test_opt(sb, GRPQUOTA))
563 seq_puts(seq, ",grpquota");
567 static char *data_mode_string(unsigned long mode)
570 case EXT3_MOUNT_JOURNAL_DATA:
572 case EXT3_MOUNT_ORDERED_DATA:
574 case EXT3_MOUNT_WRITEBACK_DATA:
582 * - it's set to a non-default value OR
583 * - if the per-sb default is different from the global default
585 static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
587 struct super_block *sb = vfs->mnt_sb;
588 struct ext3_sb_info *sbi = EXT3_SB(sb);
589 struct ext3_super_block *es = sbi->s_es;
590 unsigned long def_mount_opts;
592 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
594 if (sbi->s_sb_block != 1)
595 seq_printf(seq, ",sb=%lu", sbi->s_sb_block);
596 if (test_opt(sb, MINIX_DF))
597 seq_puts(seq, ",minixdf");
598 if (test_opt(sb, GRPID))
599 seq_puts(seq, ",grpid");
600 if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS))
601 seq_puts(seq, ",nogrpid");
602 if (sbi->s_resuid != EXT3_DEF_RESUID ||
603 le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) {
604 seq_printf(seq, ",resuid=%u", sbi->s_resuid);
606 if (sbi->s_resgid != EXT3_DEF_RESGID ||
607 le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) {
608 seq_printf(seq, ",resgid=%u", sbi->s_resgid);
610 if (test_opt(sb, ERRORS_RO)) {
611 int def_errors = le16_to_cpu(es->s_errors);
613 if (def_errors == EXT3_ERRORS_PANIC ||
614 def_errors == EXT3_ERRORS_CONTINUE) {
615 seq_puts(seq, ",errors=remount-ro");
618 if (test_opt(sb, ERRORS_CONT))
619 seq_puts(seq, ",errors=continue");
620 if (test_opt(sb, ERRORS_PANIC))
621 seq_puts(seq, ",errors=panic");
622 if (test_opt(sb, NO_UID32))
623 seq_puts(seq, ",nouid32");
624 if (test_opt(sb, DEBUG))
625 seq_puts(seq, ",debug");
626 if (test_opt(sb, OLDALLOC))
627 seq_puts(seq, ",oldalloc");
628 #ifdef CONFIG_EXT3_FS_XATTR
629 if (test_opt(sb, XATTR_USER))
630 seq_puts(seq, ",user_xattr");
631 if (!test_opt(sb, XATTR_USER) &&
632 (def_mount_opts & EXT3_DEFM_XATTR_USER)) {
633 seq_puts(seq, ",nouser_xattr");
636 #ifdef CONFIG_EXT3_FS_POSIX_ACL
637 if (test_opt(sb, POSIX_ACL))
638 seq_puts(seq, ",acl");
639 if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL))
640 seq_puts(seq, ",noacl");
642 if (!test_opt(sb, RESERVATION))
643 seq_puts(seq, ",noreservation");
644 if (sbi->s_commit_interval) {
645 seq_printf(seq, ",commit=%u",
646 (unsigned) (sbi->s_commit_interval / HZ));
650 * Always display barrier state so it's clear what the status is.
652 seq_puts(seq, ",barrier=");
653 seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0");
654 seq_printf(seq, ",data=%s", data_mode_string(test_opt(sb, DATA_FLAGS)));
655 if (test_opt(sb, DATA_ERR_ABORT))
656 seq_puts(seq, ",data_err=abort");
658 if (test_opt(sb, NOLOAD))
659 seq_puts(seq, ",norecovery");
661 ext3_show_quota_options(seq, sb);
667 static struct inode *ext3_nfs_get_inode(struct super_block *sb,
668 u64 ino, u32 generation)
672 if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO)
673 return ERR_PTR(-ESTALE);
674 if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count))
675 return ERR_PTR(-ESTALE);
677 /* iget isn't really right if the inode is currently unallocated!!
679 * ext3_read_inode will return a bad_inode if the inode had been
680 * deleted, so we should be safe.
682 * Currently we don't know the generation for parent directory, so
683 * a generation of 0 means "accept any"
685 inode = ext3_iget(sb, ino);
687 return ERR_CAST(inode);
688 if (generation && inode->i_generation != generation) {
690 return ERR_PTR(-ESTALE);
696 static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid,
697 int fh_len, int fh_type)
699 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
703 static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid,
704 int fh_len, int fh_type)
706 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
711 * Try to release metadata pages (indirect blocks, directories) which are
712 * mapped via the block device. Since these pages could have journal heads
713 * which would prevent try_to_free_buffers() from freeing them, we must use
714 * jbd layer's try_to_free_buffers() function to release them.
716 static int bdev_try_to_free_page(struct super_block *sb, struct page *page,
719 journal_t *journal = EXT3_SB(sb)->s_journal;
721 WARN_ON(PageChecked(page));
722 if (!page_has_buffers(page))
725 return journal_try_to_free_buffers(journal, page,
727 return try_to_free_buffers(page);
731 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
732 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
734 static int ext3_write_dquot(struct dquot *dquot);
735 static int ext3_acquire_dquot(struct dquot *dquot);
736 static int ext3_release_dquot(struct dquot *dquot);
737 static int ext3_mark_dquot_dirty(struct dquot *dquot);
738 static int ext3_write_info(struct super_block *sb, int type);
739 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
741 static int ext3_quota_on_mount(struct super_block *sb, int type);
742 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
743 size_t len, loff_t off);
744 static ssize_t ext3_quota_write(struct super_block *sb, int type,
745 const char *data, size_t len, loff_t off);
747 static const struct dquot_operations ext3_quota_operations = {
748 .write_dquot = ext3_write_dquot,
749 .acquire_dquot = ext3_acquire_dquot,
750 .release_dquot = ext3_release_dquot,
751 .mark_dirty = ext3_mark_dquot_dirty,
752 .write_info = ext3_write_info,
753 .alloc_dquot = dquot_alloc,
754 .destroy_dquot = dquot_destroy,
757 static const struct quotactl_ops ext3_qctl_operations = {
758 .quota_on = ext3_quota_on,
759 .quota_off = dquot_quota_off,
760 .quota_sync = dquot_quota_sync,
761 .get_info = dquot_get_dqinfo,
762 .set_info = dquot_set_dqinfo,
763 .get_dqblk = dquot_get_dqblk,
764 .set_dqblk = dquot_set_dqblk
768 static const struct super_operations ext3_sops = {
769 .alloc_inode = ext3_alloc_inode,
770 .destroy_inode = ext3_destroy_inode,
771 .write_inode = ext3_write_inode,
772 .dirty_inode = ext3_dirty_inode,
773 .evict_inode = ext3_evict_inode,
774 .put_super = ext3_put_super,
775 .sync_fs = ext3_sync_fs,
776 .freeze_fs = ext3_freeze,
777 .unfreeze_fs = ext3_unfreeze,
778 .statfs = ext3_statfs,
779 .remount_fs = ext3_remount,
780 .show_options = ext3_show_options,
782 .quota_read = ext3_quota_read,
783 .quota_write = ext3_quota_write,
785 .bdev_try_to_free_page = bdev_try_to_free_page,
788 static const struct export_operations ext3_export_ops = {
789 .fh_to_dentry = ext3_fh_to_dentry,
790 .fh_to_parent = ext3_fh_to_parent,
791 .get_parent = ext3_get_parent,
795 Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
796 Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
797 Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
798 Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
799 Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
800 Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
801 Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
802 Opt_data_err_abort, Opt_data_err_ignore,
803 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
804 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota,
805 Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err,
806 Opt_resize, Opt_usrquota, Opt_grpquota
809 static const match_table_t tokens = {
810 {Opt_bsd_df, "bsddf"},
811 {Opt_minix_df, "minixdf"},
812 {Opt_grpid, "grpid"},
813 {Opt_grpid, "bsdgroups"},
814 {Opt_nogrpid, "nogrpid"},
815 {Opt_nogrpid, "sysvgroups"},
816 {Opt_resgid, "resgid=%u"},
817 {Opt_resuid, "resuid=%u"},
819 {Opt_err_cont, "errors=continue"},
820 {Opt_err_panic, "errors=panic"},
821 {Opt_err_ro, "errors=remount-ro"},
822 {Opt_nouid32, "nouid32"},
823 {Opt_nocheck, "nocheck"},
824 {Opt_nocheck, "check=none"},
825 {Opt_debug, "debug"},
826 {Opt_oldalloc, "oldalloc"},
827 {Opt_orlov, "orlov"},
828 {Opt_user_xattr, "user_xattr"},
829 {Opt_nouser_xattr, "nouser_xattr"},
831 {Opt_noacl, "noacl"},
832 {Opt_reservation, "reservation"},
833 {Opt_noreservation, "noreservation"},
834 {Opt_noload, "noload"},
835 {Opt_noload, "norecovery"},
838 {Opt_commit, "commit=%u"},
839 {Opt_journal_update, "journal=update"},
840 {Opt_journal_inum, "journal=%u"},
841 {Opt_journal_dev, "journal_dev=%u"},
842 {Opt_abort, "abort"},
843 {Opt_data_journal, "data=journal"},
844 {Opt_data_ordered, "data=ordered"},
845 {Opt_data_writeback, "data=writeback"},
846 {Opt_data_err_abort, "data_err=abort"},
847 {Opt_data_err_ignore, "data_err=ignore"},
848 {Opt_offusrjquota, "usrjquota="},
849 {Opt_usrjquota, "usrjquota=%s"},
850 {Opt_offgrpjquota, "grpjquota="},
851 {Opt_grpjquota, "grpjquota=%s"},
852 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
853 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
854 {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
855 {Opt_grpquota, "grpquota"},
856 {Opt_noquota, "noquota"},
857 {Opt_quota, "quota"},
858 {Opt_usrquota, "usrquota"},
859 {Opt_barrier, "barrier=%u"},
860 {Opt_barrier, "barrier"},
861 {Opt_nobarrier, "nobarrier"},
862 {Opt_resize, "resize"},
866 static ext3_fsblk_t get_sb_block(void **data, struct super_block *sb)
868 ext3_fsblk_t sb_block;
869 char *options = (char *) *data;
871 if (!options || strncmp(options, "sb=", 3) != 0)
872 return 1; /* Default location */
874 /*todo: use simple_strtoll with >32bit ext3 */
875 sb_block = simple_strtoul(options, &options, 0);
876 if (*options && *options != ',') {
877 ext3_msg(sb, "error: invalid sb specification: %s",
883 *data = (void *) options;
888 static int set_qf_name(struct super_block *sb, int qtype, substring_t *args)
890 struct ext3_sb_info *sbi = EXT3_SB(sb);
893 if (sb_any_quota_loaded(sb) &&
894 !sbi->s_qf_names[qtype]) {
895 ext3_msg(sb, KERN_ERR,
896 "Cannot change journaled "
897 "quota options when quota turned on");
900 qname = match_strdup(args);
902 ext3_msg(sb, KERN_ERR,
903 "Not enough memory for storing quotafile name");
906 if (sbi->s_qf_names[qtype] &&
907 strcmp(sbi->s_qf_names[qtype], qname)) {
908 ext3_msg(sb, KERN_ERR,
909 "%s quota file already specified", QTYPE2NAME(qtype));
913 sbi->s_qf_names[qtype] = qname;
914 if (strchr(sbi->s_qf_names[qtype], '/')) {
915 ext3_msg(sb, KERN_ERR,
916 "quotafile must be on filesystem root");
917 kfree(sbi->s_qf_names[qtype]);
918 sbi->s_qf_names[qtype] = NULL;
921 set_opt(sbi->s_mount_opt, QUOTA);
925 static int clear_qf_name(struct super_block *sb, int qtype) {
927 struct ext3_sb_info *sbi = EXT3_SB(sb);
929 if (sb_any_quota_loaded(sb) &&
930 sbi->s_qf_names[qtype]) {
931 ext3_msg(sb, KERN_ERR, "Cannot change journaled quota options"
932 " when quota turned on");
936 * The space will be released later when all options are confirmed
939 sbi->s_qf_names[qtype] = NULL;
944 static int parse_options (char *options, struct super_block *sb,
945 unsigned int *inum, unsigned long *journal_devnum,
946 ext3_fsblk_t *n_blocks_count, int is_remount)
948 struct ext3_sb_info *sbi = EXT3_SB(sb);
950 substring_t args[MAX_OPT_ARGS];
960 while ((p = strsep (&options, ",")) != NULL) {
965 * Initialize args struct so we know whether arg was
966 * found; some options take optional arguments.
968 args[0].to = args[0].from = 0;
969 token = match_token(p, tokens, args);
972 clear_opt (sbi->s_mount_opt, MINIX_DF);
975 set_opt (sbi->s_mount_opt, MINIX_DF);
978 set_opt (sbi->s_mount_opt, GRPID);
981 clear_opt (sbi->s_mount_opt, GRPID);
984 if (match_int(&args[0], &option))
986 sbi->s_resuid = option;
989 if (match_int(&args[0], &option))
991 sbi->s_resgid = option;
994 /* handled by get_sb_block() instead of here */
995 /* *sb_block = match_int(&args[0]); */
998 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
999 clear_opt (sbi->s_mount_opt, ERRORS_RO);
1000 set_opt (sbi->s_mount_opt, ERRORS_PANIC);
1003 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
1004 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
1005 set_opt (sbi->s_mount_opt, ERRORS_RO);
1008 clear_opt (sbi->s_mount_opt, ERRORS_RO);
1009 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
1010 set_opt (sbi->s_mount_opt, ERRORS_CONT);
1013 set_opt (sbi->s_mount_opt, NO_UID32);
1016 clear_opt (sbi->s_mount_opt, CHECK);
1019 set_opt (sbi->s_mount_opt, DEBUG);
1022 set_opt (sbi->s_mount_opt, OLDALLOC);
1025 clear_opt (sbi->s_mount_opt, OLDALLOC);
1027 #ifdef CONFIG_EXT3_FS_XATTR
1028 case Opt_user_xattr:
1029 set_opt (sbi->s_mount_opt, XATTR_USER);
1031 case Opt_nouser_xattr:
1032 clear_opt (sbi->s_mount_opt, XATTR_USER);
1035 case Opt_user_xattr:
1036 case Opt_nouser_xattr:
1037 ext3_msg(sb, KERN_INFO,
1038 "(no)user_xattr options not supported");
1041 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1043 set_opt(sbi->s_mount_opt, POSIX_ACL);
1046 clear_opt(sbi->s_mount_opt, POSIX_ACL);
1051 ext3_msg(sb, KERN_INFO,
1052 "(no)acl options not supported");
1055 case Opt_reservation:
1056 set_opt(sbi->s_mount_opt, RESERVATION);
1058 case Opt_noreservation:
1059 clear_opt(sbi->s_mount_opt, RESERVATION);
1061 case Opt_journal_update:
1063 /* Eventually we will want to be able to create
1064 a journal file here. For now, only allow the
1065 user to specify an existing inode to be the
1068 ext3_msg(sb, KERN_ERR, "error: cannot specify "
1069 "journal on remount");
1072 set_opt (sbi->s_mount_opt, UPDATE_JOURNAL);
1074 case Opt_journal_inum:
1076 ext3_msg(sb, KERN_ERR, "error: cannot specify "
1077 "journal on remount");
1080 if (match_int(&args[0], &option))
1084 case Opt_journal_dev:
1086 ext3_msg(sb, KERN_ERR, "error: cannot specify "
1087 "journal on remount");
1090 if (match_int(&args[0], &option))
1092 *journal_devnum = option;
1095 set_opt (sbi->s_mount_opt, NOLOAD);
1098 if (match_int(&args[0], &option))
1103 option = JBD_DEFAULT_MAX_COMMIT_AGE;
1104 sbi->s_commit_interval = HZ * option;
1106 case Opt_data_journal:
1107 data_opt = EXT3_MOUNT_JOURNAL_DATA;
1109 case Opt_data_ordered:
1110 data_opt = EXT3_MOUNT_ORDERED_DATA;
1112 case Opt_data_writeback:
1113 data_opt = EXT3_MOUNT_WRITEBACK_DATA;
1116 if (test_opt(sb, DATA_FLAGS) == data_opt)
1118 ext3_msg(sb, KERN_ERR,
1119 "error: cannot change "
1120 "data mode on remount. The filesystem "
1121 "is mounted in data=%s mode and you "
1122 "try to remount it in data=%s mode.",
1123 data_mode_string(test_opt(sb,
1125 data_mode_string(data_opt));
1128 clear_opt(sbi->s_mount_opt, DATA_FLAGS);
1129 sbi->s_mount_opt |= data_opt;
1132 case Opt_data_err_abort:
1133 set_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1135 case Opt_data_err_ignore:
1136 clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1140 if (!set_qf_name(sb, USRQUOTA, &args[0]))
1144 if (!set_qf_name(sb, GRPQUOTA, &args[0]))
1147 case Opt_offusrjquota:
1148 if (!clear_qf_name(sb, USRQUOTA))
1151 case Opt_offgrpjquota:
1152 if (!clear_qf_name(sb, GRPQUOTA))
1155 case Opt_jqfmt_vfsold:
1156 qfmt = QFMT_VFS_OLD;
1158 case Opt_jqfmt_vfsv0:
1161 case Opt_jqfmt_vfsv1:
1164 if (sb_any_quota_loaded(sb) &&
1165 sbi->s_jquota_fmt != qfmt) {
1166 ext3_msg(sb, KERN_ERR, "error: cannot change "
1167 "journaled quota options when "
1168 "quota turned on.");
1171 sbi->s_jquota_fmt = qfmt;
1175 set_opt(sbi->s_mount_opt, QUOTA);
1176 set_opt(sbi->s_mount_opt, USRQUOTA);
1179 set_opt(sbi->s_mount_opt, QUOTA);
1180 set_opt(sbi->s_mount_opt, GRPQUOTA);
1183 if (sb_any_quota_loaded(sb)) {
1184 ext3_msg(sb, KERN_ERR, "error: cannot change "
1185 "quota options when quota turned on.");
1188 clear_opt(sbi->s_mount_opt, QUOTA);
1189 clear_opt(sbi->s_mount_opt, USRQUOTA);
1190 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1196 ext3_msg(sb, KERN_ERR,
1197 "error: quota options not supported.");
1201 case Opt_offusrjquota:
1202 case Opt_offgrpjquota:
1203 case Opt_jqfmt_vfsold:
1204 case Opt_jqfmt_vfsv0:
1205 case Opt_jqfmt_vfsv1:
1206 ext3_msg(sb, KERN_ERR,
1207 "error: journaled quota options not "
1214 set_opt(sbi->s_mount_opt, ABORT);
1217 clear_opt(sbi->s_mount_opt, BARRIER);
1221 if (match_int(&args[0], &option))
1224 option = 1; /* No argument, default to 1 */
1226 set_opt(sbi->s_mount_opt, BARRIER);
1228 clear_opt(sbi->s_mount_opt, BARRIER);
1234 ext3_msg(sb, KERN_ERR,
1235 "error: resize option only available "
1239 if (match_int(&args[0], &option) != 0)
1241 *n_blocks_count = option;
1244 ext3_msg(sb, KERN_WARNING,
1245 "warning: ignoring deprecated nobh option");
1248 ext3_msg(sb, KERN_WARNING,
1249 "warning: ignoring deprecated bh option");
1252 ext3_msg(sb, KERN_ERR,
1253 "error: unrecognized mount option \"%s\" "
1254 "or missing value", p);
1259 if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
1260 if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA])
1261 clear_opt(sbi->s_mount_opt, USRQUOTA);
1262 if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA])
1263 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1265 if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) {
1266 ext3_msg(sb, KERN_ERR, "error: old and new quota "
1271 if (!sbi->s_jquota_fmt) {
1272 ext3_msg(sb, KERN_ERR, "error: journaled quota format "
1277 if (sbi->s_jquota_fmt) {
1278 ext3_msg(sb, KERN_ERR, "error: journaled quota format "
1279 "specified with no journaling "
1288 static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es,
1291 struct ext3_sb_info *sbi = EXT3_SB(sb);
1294 if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) {
1295 ext3_msg(sb, KERN_ERR,
1296 "error: revision level too high, "
1297 "forcing read-only mode");
1302 if (!(sbi->s_mount_state & EXT3_VALID_FS))
1303 ext3_msg(sb, KERN_WARNING,
1304 "warning: mounting unchecked fs, "
1305 "running e2fsck is recommended");
1306 else if ((sbi->s_mount_state & EXT3_ERROR_FS))
1307 ext3_msg(sb, KERN_WARNING,
1308 "warning: mounting fs with errors, "
1309 "running e2fsck is recommended");
1310 else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 &&
1311 le16_to_cpu(es->s_mnt_count) >=
1312 le16_to_cpu(es->s_max_mnt_count))
1313 ext3_msg(sb, KERN_WARNING,
1314 "warning: maximal mount count reached, "
1315 "running e2fsck is recommended");
1316 else if (le32_to_cpu(es->s_checkinterval) &&
1317 (le32_to_cpu(es->s_lastcheck) +
1318 le32_to_cpu(es->s_checkinterval) <= get_seconds()))
1319 ext3_msg(sb, KERN_WARNING,
1320 "warning: checktime reached, "
1321 "running e2fsck is recommended");
1323 /* @@@ We _will_ want to clear the valid bit if we find
1324 inconsistencies, to force a fsck at reboot. But for
1325 a plain journaled filesystem we can keep it set as
1326 valid forever! :) */
1327 es->s_state &= cpu_to_le16(~EXT3_VALID_FS);
1329 if (!le16_to_cpu(es->s_max_mnt_count))
1330 es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT);
1331 le16_add_cpu(&es->s_mnt_count, 1);
1332 es->s_mtime = cpu_to_le32(get_seconds());
1333 ext3_update_dynamic_rev(sb);
1334 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
1336 ext3_commit_super(sb, es, 1);
1337 if (test_opt(sb, DEBUG))
1338 ext3_msg(sb, KERN_INFO, "[bs=%lu, gc=%lu, "
1339 "bpg=%lu, ipg=%lu, mo=%04lx]",
1341 sbi->s_groups_count,
1342 EXT3_BLOCKS_PER_GROUP(sb),
1343 EXT3_INODES_PER_GROUP(sb),
1346 if (EXT3_SB(sb)->s_journal->j_inode == NULL) {
1347 char b[BDEVNAME_SIZE];
1348 ext3_msg(sb, KERN_INFO, "using external journal on %s",
1349 bdevname(EXT3_SB(sb)->s_journal->j_dev, b));
1351 ext3_msg(sb, KERN_INFO, "using internal journal");
1356 /* Called at mount-time, super-block is locked */
1357 static int ext3_check_descriptors(struct super_block *sb)
1359 struct ext3_sb_info *sbi = EXT3_SB(sb);
1362 ext3_debug ("Checking group descriptors");
1364 for (i = 0; i < sbi->s_groups_count; i++) {
1365 struct ext3_group_desc *gdp = ext3_get_group_desc(sb, i, NULL);
1366 ext3_fsblk_t first_block = ext3_group_first_block_no(sb, i);
1367 ext3_fsblk_t last_block;
1369 if (i == sbi->s_groups_count - 1)
1370 last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
1372 last_block = first_block +
1373 (EXT3_BLOCKS_PER_GROUP(sb) - 1);
1375 if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
1376 le32_to_cpu(gdp->bg_block_bitmap) > last_block)
1378 ext3_error (sb, "ext3_check_descriptors",
1379 "Block bitmap for group %d"
1380 " not in group (block %lu)!",
1382 le32_to_cpu(gdp->bg_block_bitmap));
1385 if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block ||
1386 le32_to_cpu(gdp->bg_inode_bitmap) > last_block)
1388 ext3_error (sb, "ext3_check_descriptors",
1389 "Inode bitmap for group %d"
1390 " not in group (block %lu)!",
1392 le32_to_cpu(gdp->bg_inode_bitmap));
1395 if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
1396 le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 >
1399 ext3_error (sb, "ext3_check_descriptors",
1400 "Inode table for group %d"
1401 " not in group (block %lu)!",
1403 le32_to_cpu(gdp->bg_inode_table));
1408 sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb));
1409 sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb));
1414 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1415 * the superblock) which were deleted from all directories, but held open by
1416 * a process at the time of a crash. We walk the list and try to delete these
1417 * inodes at recovery time (only with a read-write filesystem).
1419 * In order to keep the orphan inode chain consistent during traversal (in
1420 * case of crash during recovery), we link each inode into the superblock
1421 * orphan list_head and handle it the same way as an inode deletion during
1422 * normal operation (which journals the operations for us).
1424 * We only do an iget() and an iput() on each inode, which is very safe if we
1425 * accidentally point at an in-use or already deleted inode. The worst that
1426 * can happen in this case is that we get a "bit already cleared" message from
1427 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1428 * e2fsck was run on this filesystem, and it must have already done the orphan
1429 * inode cleanup for us, so we can safely abort without any further action.
1431 static void ext3_orphan_cleanup (struct super_block * sb,
1432 struct ext3_super_block * es)
1434 unsigned int s_flags = sb->s_flags;
1435 int nr_orphans = 0, nr_truncates = 0;
1439 if (!es->s_last_orphan) {
1440 jbd_debug(4, "no orphan inodes to clean up\n");
1444 if (bdev_read_only(sb->s_bdev)) {
1445 ext3_msg(sb, KERN_ERR, "error: write access "
1446 "unavailable, skipping orphan cleanup.");
1450 if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) {
1451 if (es->s_last_orphan)
1452 jbd_debug(1, "Errors on filesystem, "
1453 "clearing orphan list.\n");
1454 es->s_last_orphan = 0;
1455 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1459 if (s_flags & MS_RDONLY) {
1460 ext3_msg(sb, KERN_INFO, "orphan cleanup on readonly fs");
1461 sb->s_flags &= ~MS_RDONLY;
1464 /* Needed for iput() to work correctly and not trash data */
1465 sb->s_flags |= MS_ACTIVE;
1466 /* Turn on quotas so that they are updated correctly */
1467 for (i = 0; i < MAXQUOTAS; i++) {
1468 if (EXT3_SB(sb)->s_qf_names[i]) {
1469 int ret = ext3_quota_on_mount(sb, i);
1471 ext3_msg(sb, KERN_ERR,
1472 "error: cannot turn on journaled "
1478 while (es->s_last_orphan) {
1479 struct inode *inode;
1481 inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan));
1482 if (IS_ERR(inode)) {
1483 es->s_last_orphan = 0;
1487 list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan);
1488 dquot_initialize(inode);
1489 if (inode->i_nlink) {
1491 "%s: truncating inode %lu to %Ld bytes\n",
1492 __func__, inode->i_ino, inode->i_size);
1493 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1494 inode->i_ino, inode->i_size);
1495 ext3_truncate(inode);
1499 "%s: deleting unreferenced inode %lu\n",
1500 __func__, inode->i_ino);
1501 jbd_debug(2, "deleting unreferenced inode %lu\n",
1505 iput(inode); /* The delete magic happens here! */
1508 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1511 ext3_msg(sb, KERN_INFO, "%d orphan inode%s deleted",
1512 PLURAL(nr_orphans));
1514 ext3_msg(sb, KERN_INFO, "%d truncate%s cleaned up",
1515 PLURAL(nr_truncates));
1517 /* Turn quotas off */
1518 for (i = 0; i < MAXQUOTAS; i++) {
1519 if (sb_dqopt(sb)->files[i])
1520 dquot_quota_off(sb, i);
1523 sb->s_flags = s_flags; /* Restore MS_RDONLY status */
1527 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1528 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1529 * We need to be 1 filesystem block less than the 2^32 sector limit.
1531 static loff_t ext3_max_size(int bits)
1533 loff_t res = EXT3_NDIR_BLOCKS;
1537 /* This is calculated to be the largest file size for a
1538 * dense, file such that the total number of
1539 * sectors in the file, including data and all indirect blocks,
1540 * does not exceed 2^32 -1
1541 * __u32 i_blocks representing the total number of
1542 * 512 bytes blocks of the file
1544 upper_limit = (1LL << 32) - 1;
1546 /* total blocks in file system block size */
1547 upper_limit >>= (bits - 9);
1550 /* indirect blocks */
1552 /* double indirect blocks */
1553 meta_blocks += 1 + (1LL << (bits-2));
1554 /* tripple indirect blocks */
1555 meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
1557 upper_limit -= meta_blocks;
1558 upper_limit <<= bits;
1560 res += 1LL << (bits-2);
1561 res += 1LL << (2*(bits-2));
1562 res += 1LL << (3*(bits-2));
1564 if (res > upper_limit)
1567 if (res > MAX_LFS_FILESIZE)
1568 res = MAX_LFS_FILESIZE;
1573 static ext3_fsblk_t descriptor_loc(struct super_block *sb,
1574 ext3_fsblk_t logic_sb_block,
1577 struct ext3_sb_info *sbi = EXT3_SB(sb);
1578 unsigned long bg, first_meta_bg;
1581 first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
1583 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) ||
1585 return (logic_sb_block + nr + 1);
1586 bg = sbi->s_desc_per_block * nr;
1587 if (ext3_bg_has_super(sb, bg))
1589 return (has_super + ext3_group_first_block_no(sb, bg));
1593 static int ext3_fill_super (struct super_block *sb, void *data, int silent)
1595 struct buffer_head * bh;
1596 struct ext3_super_block *es = NULL;
1597 struct ext3_sb_info *sbi;
1599 ext3_fsblk_t sb_block = get_sb_block(&data, sb);
1600 ext3_fsblk_t logic_sb_block;
1601 unsigned long offset = 0;
1602 unsigned int journal_inum = 0;
1603 unsigned long journal_devnum = 0;
1604 unsigned long def_mount_opts;
1615 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
1619 sbi->s_blockgroup_lock =
1620 kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
1621 if (!sbi->s_blockgroup_lock) {
1625 sb->s_fs_info = sbi;
1626 sbi->s_mount_opt = 0;
1627 sbi->s_resuid = EXT3_DEF_RESUID;
1628 sbi->s_resgid = EXT3_DEF_RESGID;
1629 sbi->s_sb_block = sb_block;
1631 blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE);
1633 ext3_msg(sb, KERN_ERR, "error: unable to set blocksize");
1638 * The ext3 superblock will not be buffer aligned for other than 1kB
1639 * block sizes. We need to calculate the offset from buffer start.
1641 if (blocksize != EXT3_MIN_BLOCK_SIZE) {
1642 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1643 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1645 logic_sb_block = sb_block;
1648 if (!(bh = sb_bread(sb, logic_sb_block))) {
1649 ext3_msg(sb, KERN_ERR, "error: unable to read superblock");
1653 * Note: s_es must be initialized as soon as possible because
1654 * some ext3 macro-instructions depend on its value
1656 es = (struct ext3_super_block *) (bh->b_data + offset);
1658 sb->s_magic = le16_to_cpu(es->s_magic);
1659 if (sb->s_magic != EXT3_SUPER_MAGIC)
1662 /* Set defaults before we parse the mount options */
1663 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
1664 if (def_mount_opts & EXT3_DEFM_DEBUG)
1665 set_opt(sbi->s_mount_opt, DEBUG);
1666 if (def_mount_opts & EXT3_DEFM_BSDGROUPS)
1667 set_opt(sbi->s_mount_opt, GRPID);
1668 if (def_mount_opts & EXT3_DEFM_UID16)
1669 set_opt(sbi->s_mount_opt, NO_UID32);
1670 #ifdef CONFIG_EXT3_FS_XATTR
1671 if (def_mount_opts & EXT3_DEFM_XATTR_USER)
1672 set_opt(sbi->s_mount_opt, XATTR_USER);
1674 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1675 if (def_mount_opts & EXT3_DEFM_ACL)
1676 set_opt(sbi->s_mount_opt, POSIX_ACL);
1678 if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA)
1679 set_opt(sbi->s_mount_opt, JOURNAL_DATA);
1680 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED)
1681 set_opt(sbi->s_mount_opt, ORDERED_DATA);
1682 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK)
1683 set_opt(sbi->s_mount_opt, WRITEBACK_DATA);
1685 if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC)
1686 set_opt(sbi->s_mount_opt, ERRORS_PANIC);
1687 else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_CONTINUE)
1688 set_opt(sbi->s_mount_opt, ERRORS_CONT);
1690 set_opt(sbi->s_mount_opt, ERRORS_RO);
1692 sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
1693 sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
1695 set_opt(sbi->s_mount_opt, RESERVATION);
1697 if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
1701 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1702 (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0);
1704 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV &&
1705 (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) ||
1706 EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
1707 EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U)))
1708 ext3_msg(sb, KERN_WARNING,
1709 "warning: feature flags set on rev 0 fs, "
1710 "running e2fsck is recommended");
1712 * Check feature flags regardless of the revision level, since we
1713 * previously didn't change the revision level when setting the flags,
1714 * so there is a chance incompat flags are set on a rev 0 filesystem.
1716 features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP);
1718 ext3_msg(sb, KERN_ERR,
1719 "error: couldn't mount because of unsupported "
1720 "optional features (%x)", le32_to_cpu(features));
1723 features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP);
1724 if (!(sb->s_flags & MS_RDONLY) && features) {
1725 ext3_msg(sb, KERN_ERR,
1726 "error: couldn't mount RDWR because of unsupported "
1727 "optional features (%x)", le32_to_cpu(features));
1730 blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
1732 if (blocksize < EXT3_MIN_BLOCK_SIZE ||
1733 blocksize > EXT3_MAX_BLOCK_SIZE) {
1734 ext3_msg(sb, KERN_ERR,
1735 "error: couldn't mount because of unsupported "
1736 "filesystem blocksize %d", blocksize);
1740 hblock = bdev_logical_block_size(sb->s_bdev);
1741 if (sb->s_blocksize != blocksize) {
1743 * Make sure the blocksize for the filesystem is larger
1744 * than the hardware sectorsize for the machine.
1746 if (blocksize < hblock) {
1747 ext3_msg(sb, KERN_ERR,
1748 "error: fsblocksize %d too small for "
1749 "hardware sectorsize %d", blocksize, hblock);
1754 if (!sb_set_blocksize(sb, blocksize)) {
1755 ext3_msg(sb, KERN_ERR,
1756 "error: bad blocksize %d", blocksize);
1759 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1760 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1761 bh = sb_bread(sb, logic_sb_block);
1763 ext3_msg(sb, KERN_ERR,
1764 "error: can't read superblock on 2nd try");
1767 es = (struct ext3_super_block *)(bh->b_data + offset);
1769 if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) {
1770 ext3_msg(sb, KERN_ERR,
1771 "error: magic mismatch");
1776 sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits);
1778 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) {
1779 sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE;
1780 sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO;
1782 sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
1783 sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
1784 if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) ||
1785 (!is_power_of_2(sbi->s_inode_size)) ||
1786 (sbi->s_inode_size > blocksize)) {
1787 ext3_msg(sb, KERN_ERR,
1788 "error: unsupported inode size: %d",
1793 sbi->s_frag_size = EXT3_MIN_FRAG_SIZE <<
1794 le32_to_cpu(es->s_log_frag_size);
1795 if (blocksize != sbi->s_frag_size) {
1796 ext3_msg(sb, KERN_ERR,
1797 "error: fragsize %lu != blocksize %u (unsupported)",
1798 sbi->s_frag_size, blocksize);
1801 sbi->s_frags_per_block = 1;
1802 sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
1803 sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
1804 sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
1805 if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0)
1807 sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb);
1808 if (sbi->s_inodes_per_block == 0)
1810 sbi->s_itb_per_group = sbi->s_inodes_per_group /
1811 sbi->s_inodes_per_block;
1812 sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc);
1814 sbi->s_mount_state = le16_to_cpu(es->s_state);
1815 sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb));
1816 sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb));
1817 for (i=0; i < 4; i++)
1818 sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
1819 sbi->s_def_hash_version = es->s_def_hash_version;
1820 i = le32_to_cpu(es->s_flags);
1821 if (i & EXT2_FLAGS_UNSIGNED_HASH)
1822 sbi->s_hash_unsigned = 3;
1823 else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) {
1824 #ifdef __CHAR_UNSIGNED__
1825 es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH);
1826 sbi->s_hash_unsigned = 3;
1828 es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH);
1832 if (sbi->s_blocks_per_group > blocksize * 8) {
1833 ext3_msg(sb, KERN_ERR,
1834 "#blocks per group too big: %lu",
1835 sbi->s_blocks_per_group);
1838 if (sbi->s_frags_per_group > blocksize * 8) {
1839 ext3_msg(sb, KERN_ERR,
1840 "error: #fragments per group too big: %lu",
1841 sbi->s_frags_per_group);
1844 if (sbi->s_inodes_per_group > blocksize * 8) {
1845 ext3_msg(sb, KERN_ERR,
1846 "error: #inodes per group too big: %lu",
1847 sbi->s_inodes_per_group);
1851 if (generic_check_addressable(sb->s_blocksize_bits,
1852 le32_to_cpu(es->s_blocks_count))) {
1853 ext3_msg(sb, KERN_ERR,
1854 "error: filesystem is too large to mount safely");
1855 if (sizeof(sector_t) < 8)
1856 ext3_msg(sb, KERN_ERR,
1857 "error: CONFIG_LBDAF not enabled");
1861 if (EXT3_BLOCKS_PER_GROUP(sb) == 0)
1863 sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
1864 le32_to_cpu(es->s_first_data_block) - 1)
1865 / EXT3_BLOCKS_PER_GROUP(sb)) + 1;
1866 db_count = DIV_ROUND_UP(sbi->s_groups_count, EXT3_DESC_PER_BLOCK(sb));
1867 sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
1869 if (sbi->s_group_desc == NULL) {
1870 ext3_msg(sb, KERN_ERR,
1871 "error: not enough memory");
1876 bgl_lock_init(sbi->s_blockgroup_lock);
1878 for (i = 0; i < db_count; i++) {
1879 block = descriptor_loc(sb, logic_sb_block, i);
1880 sbi->s_group_desc[i] = sb_bread(sb, block);
1881 if (!sbi->s_group_desc[i]) {
1882 ext3_msg(sb, KERN_ERR,
1883 "error: can't read group descriptor %d", i);
1888 if (!ext3_check_descriptors (sb)) {
1889 ext3_msg(sb, KERN_ERR,
1890 "error: group descriptors corrupted");
1893 sbi->s_gdb_count = db_count;
1894 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1895 spin_lock_init(&sbi->s_next_gen_lock);
1897 /* per fileystem reservation list head & lock */
1898 spin_lock_init(&sbi->s_rsv_window_lock);
1899 sbi->s_rsv_window_root = RB_ROOT;
1900 /* Add a single, static dummy reservation to the start of the
1901 * reservation window list --- it gives us a placeholder for
1902 * append-at-start-of-list which makes the allocation logic
1903 * _much_ simpler. */
1904 sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1905 sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1906 sbi->s_rsv_window_head.rsv_alloc_hit = 0;
1907 sbi->s_rsv_window_head.rsv_goal_size = 0;
1908 ext3_rsv_window_add(sb, &sbi->s_rsv_window_head);
1911 * set up enough so that it can read an inode
1913 sb->s_op = &ext3_sops;
1914 sb->s_export_op = &ext3_export_ops;
1915 sb->s_xattr = ext3_xattr_handlers;
1917 sb->s_qcop = &ext3_qctl_operations;
1918 sb->dq_op = &ext3_quota_operations;
1920 INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
1921 mutex_init(&sbi->s_orphan_lock);
1922 mutex_init(&sbi->s_resize_lock);
1926 needs_recovery = (es->s_last_orphan != 0 ||
1927 EXT3_HAS_INCOMPAT_FEATURE(sb,
1928 EXT3_FEATURE_INCOMPAT_RECOVER));
1931 * The first inode we look at is the journal inode. Don't try
1932 * root first: it may be modified in the journal!
1934 if (!test_opt(sb, NOLOAD) &&
1935 EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1936 if (ext3_load_journal(sb, es, journal_devnum))
1938 } else if (journal_inum) {
1939 if (ext3_create_journal(sb, es, journal_inum))
1943 ext3_msg(sb, KERN_ERR,
1944 "error: no journal found. "
1945 "mounting ext3 over ext2?");
1948 err = percpu_counter_init(&sbi->s_freeblocks_counter,
1949 ext3_count_free_blocks(sb));
1951 err = percpu_counter_init(&sbi->s_freeinodes_counter,
1952 ext3_count_free_inodes(sb));
1955 err = percpu_counter_init(&sbi->s_dirs_counter,
1956 ext3_count_dirs(sb));
1959 ext3_msg(sb, KERN_ERR, "error: insufficient memory");
1964 /* We have now updated the journal if required, so we can
1965 * validate the data journaling mode. */
1966 switch (test_opt(sb, DATA_FLAGS)) {
1968 /* No mode set, assume a default based on the journal
1969 capabilities: ORDERED_DATA if the journal can
1970 cope, else JOURNAL_DATA */
1971 if (journal_check_available_features
1972 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE))
1973 set_opt(sbi->s_mount_opt, DEFAULT_DATA_MODE);
1975 set_opt(sbi->s_mount_opt, JOURNAL_DATA);
1978 case EXT3_MOUNT_ORDERED_DATA:
1979 case EXT3_MOUNT_WRITEBACK_DATA:
1980 if (!journal_check_available_features
1981 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) {
1982 ext3_msg(sb, KERN_ERR,
1983 "error: journal does not support "
1984 "requested data journaling mode");
1992 * The journal_load will have done any necessary log recovery,
1993 * so we can safely mount the rest of the filesystem now.
1996 root = ext3_iget(sb, EXT3_ROOT_INO);
1998 ext3_msg(sb, KERN_ERR, "error: get root inode failed");
1999 ret = PTR_ERR(root);
2002 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
2004 ext3_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck");
2007 sb->s_root = d_alloc_root(root);
2009 ext3_msg(sb, KERN_ERR, "error: get root dentry failed");
2015 ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
2017 EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS;
2018 ext3_orphan_cleanup(sb, es);
2019 EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS;
2021 ext3_msg(sb, KERN_INFO, "recovery complete");
2022 ext3_mark_recovery_complete(sb, es);
2023 ext3_msg(sb, KERN_INFO, "mounted filesystem with %s data mode",
2024 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal":
2025 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered":
2032 ext3_msg(sb, KERN_INFO,
2033 "error: can't find ext3 filesystem on dev %s.",
2038 percpu_counter_destroy(&sbi->s_freeblocks_counter);
2039 percpu_counter_destroy(&sbi->s_freeinodes_counter);
2040 percpu_counter_destroy(&sbi->s_dirs_counter);
2041 journal_destroy(sbi->s_journal);
2043 for (i = 0; i < db_count; i++)
2044 brelse(sbi->s_group_desc[i]);
2045 kfree(sbi->s_group_desc);
2048 for (i = 0; i < MAXQUOTAS; i++)
2049 kfree(sbi->s_qf_names[i]);
2051 ext3_blkdev_remove(sbi);
2054 sb->s_fs_info = NULL;
2055 kfree(sbi->s_blockgroup_lock);
2061 * Setup any per-fs journal parameters now. We'll do this both on
2062 * initial mount, once the journal has been initialised but before we've
2063 * done any recovery; and again on any subsequent remount.
2065 static void ext3_init_journal_params(struct super_block *sb, journal_t *journal)
2067 struct ext3_sb_info *sbi = EXT3_SB(sb);
2069 if (sbi->s_commit_interval)
2070 journal->j_commit_interval = sbi->s_commit_interval;
2071 /* We could also set up an ext3-specific default for the commit
2072 * interval here, but for now we'll just fall back to the jbd
2075 spin_lock(&journal->j_state_lock);
2076 if (test_opt(sb, BARRIER))
2077 journal->j_flags |= JFS_BARRIER;
2079 journal->j_flags &= ~JFS_BARRIER;
2080 if (test_opt(sb, DATA_ERR_ABORT))
2081 journal->j_flags |= JFS_ABORT_ON_SYNCDATA_ERR;
2083 journal->j_flags &= ~JFS_ABORT_ON_SYNCDATA_ERR;
2084 spin_unlock(&journal->j_state_lock);
2087 static journal_t *ext3_get_journal(struct super_block *sb,
2088 unsigned int journal_inum)
2090 struct inode *journal_inode;
2093 /* First, test for the existence of a valid inode on disk. Bad
2094 * things happen if we iget() an unused inode, as the subsequent
2095 * iput() will try to delete it. */
2097 journal_inode = ext3_iget(sb, journal_inum);
2098 if (IS_ERR(journal_inode)) {
2099 ext3_msg(sb, KERN_ERR, "error: no journal found");
2102 if (!journal_inode->i_nlink) {
2103 make_bad_inode(journal_inode);
2104 iput(journal_inode);
2105 ext3_msg(sb, KERN_ERR, "error: journal inode is deleted");
2109 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2110 journal_inode, journal_inode->i_size);
2111 if (!S_ISREG(journal_inode->i_mode)) {
2112 ext3_msg(sb, KERN_ERR, "error: invalid journal inode");
2113 iput(journal_inode);
2117 journal = journal_init_inode(journal_inode);
2119 ext3_msg(sb, KERN_ERR, "error: could not load journal inode");
2120 iput(journal_inode);
2123 journal->j_private = sb;
2124 ext3_init_journal_params(sb, journal);
2128 static journal_t *ext3_get_dev_journal(struct super_block *sb,
2131 struct buffer_head * bh;
2135 int hblock, blocksize;
2136 ext3_fsblk_t sb_block;
2137 unsigned long offset;
2138 struct ext3_super_block * es;
2139 struct block_device *bdev;
2141 bdev = ext3_blkdev_get(j_dev, sb);
2145 if (bd_claim(bdev, sb)) {
2146 ext3_msg(sb, KERN_ERR,
2147 "error: failed to claim external journal device");
2148 blkdev_put(bdev, FMODE_READ|FMODE_WRITE);
2152 blocksize = sb->s_blocksize;
2153 hblock = bdev_logical_block_size(bdev);
2154 if (blocksize < hblock) {
2155 ext3_msg(sb, KERN_ERR,
2156 "error: blocksize too small for journal device");
2160 sb_block = EXT3_MIN_BLOCK_SIZE / blocksize;
2161 offset = EXT3_MIN_BLOCK_SIZE % blocksize;
2162 set_blocksize(bdev, blocksize);
2163 if (!(bh = __bread(bdev, sb_block, blocksize))) {
2164 ext3_msg(sb, KERN_ERR, "error: couldn't read superblock of "
2165 "external journal");
2169 es = (struct ext3_super_block *) (bh->b_data + offset);
2170 if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) ||
2171 !(le32_to_cpu(es->s_feature_incompat) &
2172 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
2173 ext3_msg(sb, KERN_ERR, "error: external journal has "
2179 if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
2180 ext3_msg(sb, KERN_ERR, "error: journal UUID does not match");
2185 len = le32_to_cpu(es->s_blocks_count);
2186 start = sb_block + 1;
2187 brelse(bh); /* we're done with the superblock */
2189 journal = journal_init_dev(bdev, sb->s_bdev,
2190 start, len, blocksize);
2192 ext3_msg(sb, KERN_ERR,
2193 "error: failed to create device journal");
2196 journal->j_private = sb;
2197 ll_rw_block(READ, 1, &journal->j_sb_buffer);
2198 wait_on_buffer(journal->j_sb_buffer);
2199 if (!buffer_uptodate(journal->j_sb_buffer)) {
2200 ext3_msg(sb, KERN_ERR, "I/O error on journal device");
2203 if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {
2204 ext3_msg(sb, KERN_ERR,
2205 "error: external journal has more than one "
2206 "user (unsupported) - %d",
2207 be32_to_cpu(journal->j_superblock->s_nr_users));
2210 EXT3_SB(sb)->journal_bdev = bdev;
2211 ext3_init_journal_params(sb, journal);
2214 journal_destroy(journal);
2216 ext3_blkdev_put(bdev);
2220 static int ext3_load_journal(struct super_block *sb,
2221 struct ext3_super_block *es,
2222 unsigned long journal_devnum)
2225 unsigned int journal_inum = le32_to_cpu(es->s_journal_inum);
2228 int really_read_only;
2230 if (journal_devnum &&
2231 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2232 ext3_msg(sb, KERN_INFO, "external journal device major/minor "
2233 "numbers have changed");
2234 journal_dev = new_decode_dev(journal_devnum);
2236 journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));
2238 really_read_only = bdev_read_only(sb->s_bdev);
2241 * Are we loading a blank journal or performing recovery after a
2242 * crash? For recovery, we need to check in advance whether we
2243 * can get read-write access to the device.
2246 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) {
2247 if (sb->s_flags & MS_RDONLY) {
2248 ext3_msg(sb, KERN_INFO,
2249 "recovery required on readonly filesystem");
2250 if (really_read_only) {
2251 ext3_msg(sb, KERN_ERR, "error: write access "
2252 "unavailable, cannot proceed");
2255 ext3_msg(sb, KERN_INFO,
2256 "write access will be enabled during recovery");
2260 if (journal_inum && journal_dev) {
2261 ext3_msg(sb, KERN_ERR, "error: filesystem has both journal "
2262 "and inode journals");
2267 if (!(journal = ext3_get_journal(sb, journal_inum)))
2270 if (!(journal = ext3_get_dev_journal(sb, journal_dev)))
2274 if (!(journal->j_flags & JFS_BARRIER))
2275 printk(KERN_INFO "EXT3-fs: barriers not enabled\n");
2277 if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) {
2278 err = journal_update_format(journal);
2280 ext3_msg(sb, KERN_ERR, "error updating journal");
2281 journal_destroy(journal);
2286 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER))
2287 err = journal_wipe(journal, !really_read_only);
2289 err = journal_load(journal);
2292 ext3_msg(sb, KERN_ERR, "error loading journal");
2293 journal_destroy(journal);
2297 EXT3_SB(sb)->s_journal = journal;
2298 ext3_clear_journal_err(sb, es);
2300 if (journal_devnum &&
2301 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2302 es->s_journal_dev = cpu_to_le32(journal_devnum);
2304 /* Make sure we flush the recovery flag to disk. */
2305 ext3_commit_super(sb, es, 1);
2311 static int ext3_create_journal(struct super_block *sb,
2312 struct ext3_super_block *es,
2313 unsigned int journal_inum)
2318 if (sb->s_flags & MS_RDONLY) {
2319 ext3_msg(sb, KERN_ERR,
2320 "error: readonly filesystem when trying to "
2325 journal = ext3_get_journal(sb, journal_inum);
2329 ext3_msg(sb, KERN_INFO, "creating new journal on inode %u",
2332 err = journal_create(journal);
2334 ext3_msg(sb, KERN_ERR, "error creating journal");
2335 journal_destroy(journal);
2339 EXT3_SB(sb)->s_journal = journal;
2341 ext3_update_dynamic_rev(sb);
2342 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2343 EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL);
2345 es->s_journal_inum = cpu_to_le32(journal_inum);
2347 /* Make sure we flush the recovery flag to disk. */
2348 ext3_commit_super(sb, es, 1);
2353 static int ext3_commit_super(struct super_block *sb,
2354 struct ext3_super_block *es,
2357 struct buffer_head *sbh = EXT3_SB(sb)->s_sbh;
2363 if (buffer_write_io_error(sbh)) {
2365 * Oh, dear. A previous attempt to write the
2366 * superblock failed. This could happen because the
2367 * USB device was yanked out. Or it could happen to
2368 * be a transient write error and maybe the block will
2369 * be remapped. Nothing we can do but to retry the
2370 * write and hope for the best.
2372 ext3_msg(sb, KERN_ERR, "previous I/O error to "
2373 "superblock detected");
2374 clear_buffer_write_io_error(sbh);
2375 set_buffer_uptodate(sbh);
2378 * If the file system is mounted read-only, don't update the
2379 * superblock write time. This avoids updating the superblock
2380 * write time when we are mounting the root file system
2381 * read/only but we need to replay the journal; at that point,
2382 * for people who are east of GMT and who make their clock
2383 * tick in localtime for Windows bug-for-bug compatibility,
2384 * the clock is set in the future, and this will cause e2fsck
2385 * to complain and force a full file system check.
2387 if (!(sb->s_flags & MS_RDONLY))
2388 es->s_wtime = cpu_to_le32(get_seconds());
2389 es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb));
2390 es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb));
2391 BUFFER_TRACE(sbh, "marking dirty");
2392 mark_buffer_dirty(sbh);
2394 error = sync_dirty_buffer(sbh);
2395 if (buffer_write_io_error(sbh)) {
2396 ext3_msg(sb, KERN_ERR, "I/O error while writing "
2398 clear_buffer_write_io_error(sbh);
2399 set_buffer_uptodate(sbh);
2407 * Have we just finished recovery? If so, and if we are mounting (or
2408 * remounting) the filesystem readonly, then we will end up with a
2409 * consistent fs on disk. Record that fact.
2411 static void ext3_mark_recovery_complete(struct super_block * sb,
2412 struct ext3_super_block * es)
2414 journal_t *journal = EXT3_SB(sb)->s_journal;
2416 journal_lock_updates(journal);
2417 if (journal_flush(journal) < 0)
2420 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) &&
2421 sb->s_flags & MS_RDONLY) {
2422 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2423 ext3_commit_super(sb, es, 1);
2427 journal_unlock_updates(journal);
2431 * If we are mounting (or read-write remounting) a filesystem whose journal
2432 * has recorded an error from a previous lifetime, move that error to the
2433 * main filesystem now.
2435 static void ext3_clear_journal_err(struct super_block *sb,
2436 struct ext3_super_block *es)
2442 journal = EXT3_SB(sb)->s_journal;
2445 * Now check for any error status which may have been recorded in the
2446 * journal by a prior ext3_error() or ext3_abort()
2449 j_errno = journal_errno(journal);
2453 errstr = ext3_decode_error(sb, j_errno, nbuf);
2454 ext3_warning(sb, __func__, "Filesystem error recorded "
2455 "from previous mount: %s", errstr);
2456 ext3_warning(sb, __func__, "Marking fs in need of "
2457 "filesystem check.");
2459 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
2460 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
2461 ext3_commit_super (sb, es, 1);
2463 journal_clear_err(journal);
2468 * Force the running and committing transactions to commit,
2469 * and wait on the commit.
2471 int ext3_force_commit(struct super_block *sb)
2476 if (sb->s_flags & MS_RDONLY)
2479 journal = EXT3_SB(sb)->s_journal;
2480 ret = ext3_journal_force_commit(journal);
2484 static int ext3_sync_fs(struct super_block *sb, int wait)
2488 if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) {
2490 log_wait_commit(EXT3_SB(sb)->s_journal, target);
2496 * LVM calls this function before a (read-only) snapshot is created. This
2497 * gives us a chance to flush the journal completely and mark the fs clean.
2499 static int ext3_freeze(struct super_block *sb)
2504 if (!(sb->s_flags & MS_RDONLY)) {
2505 journal = EXT3_SB(sb)->s_journal;
2507 /* Now we set up the journal barrier. */
2508 journal_lock_updates(journal);
2511 * We don't want to clear needs_recovery flag when we failed
2512 * to flush the journal.
2514 error = journal_flush(journal);
2518 /* Journal blocked and flushed, clear needs_recovery flag. */
2519 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2520 error = ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2527 journal_unlock_updates(journal);
2532 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2533 * flag here, even though the filesystem is not technically dirty yet.
2535 static int ext3_unfreeze(struct super_block *sb)
2537 if (!(sb->s_flags & MS_RDONLY)) {
2539 /* Reser the needs_recovery flag before the fs is unlocked. */
2540 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2541 ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2543 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2548 static int ext3_remount (struct super_block * sb, int * flags, char * data)
2550 struct ext3_super_block * es;
2551 struct ext3_sb_info *sbi = EXT3_SB(sb);
2552 ext3_fsblk_t n_blocks_count = 0;
2553 unsigned long old_sb_flags;
2554 struct ext3_mount_options old_opts;
2555 int enable_quota = 0;
2561 /* Store the original options */
2563 old_sb_flags = sb->s_flags;
2564 old_opts.s_mount_opt = sbi->s_mount_opt;
2565 old_opts.s_resuid = sbi->s_resuid;
2566 old_opts.s_resgid = sbi->s_resgid;
2567 old_opts.s_commit_interval = sbi->s_commit_interval;
2569 old_opts.s_jquota_fmt = sbi->s_jquota_fmt;
2570 for (i = 0; i < MAXQUOTAS; i++)
2571 old_opts.s_qf_names[i] = sbi->s_qf_names[i];
2575 * Allow the "check" option to be passed as a remount option.
2577 if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) {
2582 if (test_opt(sb, ABORT))
2583 ext3_abort(sb, __func__, "Abort forced by user");
2585 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
2586 (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0);
2590 ext3_init_journal_params(sb, sbi->s_journal);
2592 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) ||
2593 n_blocks_count > le32_to_cpu(es->s_blocks_count)) {
2594 if (test_opt(sb, ABORT)) {
2599 if (*flags & MS_RDONLY) {
2600 err = dquot_suspend(sb, -1);
2605 * First of all, the unconditional stuff we have to do
2606 * to disable replay of the journal when we next remount
2608 sb->s_flags |= MS_RDONLY;
2611 * OK, test if we are remounting a valid rw partition
2612 * readonly, and if so set the rdonly flag and then
2613 * mark the partition as valid again.
2615 if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) &&
2616 (sbi->s_mount_state & EXT3_VALID_FS))
2617 es->s_state = cpu_to_le16(sbi->s_mount_state);
2619 ext3_mark_recovery_complete(sb, es);
2622 if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb,
2623 ~EXT3_FEATURE_RO_COMPAT_SUPP))) {
2624 ext3_msg(sb, KERN_WARNING,
2625 "warning: couldn't remount RDWR "
2626 "because of unsupported optional "
2627 "features (%x)", le32_to_cpu(ret));
2633 * If we have an unprocessed orphan list hanging
2634 * around from a previously readonly bdev mount,
2635 * require a full umount/remount for now.
2637 if (es->s_last_orphan) {
2638 ext3_msg(sb, KERN_WARNING, "warning: couldn't "
2639 "remount RDWR because of unprocessed "
2640 "orphan inode list. Please "
2641 "umount/remount instead.");
2647 * Mounting a RDONLY partition read-write, so reread
2648 * and store the current valid flag. (It may have
2649 * been changed by e2fsck since we originally mounted
2652 ext3_clear_journal_err(sb, es);
2653 sbi->s_mount_state = le16_to_cpu(es->s_state);
2654 if ((err = ext3_group_extend(sb, es, n_blocks_count)))
2656 if (!ext3_setup_super (sb, es, 0))
2657 sb->s_flags &= ~MS_RDONLY;
2662 /* Release old quota file names */
2663 for (i = 0; i < MAXQUOTAS; i++)
2664 if (old_opts.s_qf_names[i] &&
2665 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2666 kfree(old_opts.s_qf_names[i]);
2671 dquot_resume(sb, -1);
2674 sb->s_flags = old_sb_flags;
2675 sbi->s_mount_opt = old_opts.s_mount_opt;
2676 sbi->s_resuid = old_opts.s_resuid;
2677 sbi->s_resgid = old_opts.s_resgid;
2678 sbi->s_commit_interval = old_opts.s_commit_interval;
2680 sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
2681 for (i = 0; i < MAXQUOTAS; i++) {
2682 if (sbi->s_qf_names[i] &&
2683 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2684 kfree(sbi->s_qf_names[i]);
2685 sbi->s_qf_names[i] = old_opts.s_qf_names[i];
2692 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
2694 struct super_block *sb = dentry->d_sb;
2695 struct ext3_sb_info *sbi = EXT3_SB(sb);
2696 struct ext3_super_block *es = sbi->s_es;
2699 if (test_opt(sb, MINIX_DF)) {
2700 sbi->s_overhead_last = 0;
2701 } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
2702 unsigned long ngroups = sbi->s_groups_count, i;
2703 ext3_fsblk_t overhead = 0;
2707 * Compute the overhead (FS structures). This is constant
2708 * for a given filesystem unless the number of block groups
2709 * changes so we cache the previous value until it does.
2713 * All of the blocks before first_data_block are
2716 overhead = le32_to_cpu(es->s_first_data_block);
2719 * Add the overhead attributed to the superblock and
2720 * block group descriptors. If the sparse superblocks
2721 * feature is turned on, then not all groups have this.
2723 for (i = 0; i < ngroups; i++) {
2724 overhead += ext3_bg_has_super(sb, i) +
2725 ext3_bg_num_gdb(sb, i);
2730 * Every block group has an inode bitmap, a block
2731 * bitmap, and an inode table.
2733 overhead += ngroups * (2 + sbi->s_itb_per_group);
2734 sbi->s_overhead_last = overhead;
2736 sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
2739 buf->f_type = EXT3_SUPER_MAGIC;
2740 buf->f_bsize = sb->s_blocksize;
2741 buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last;
2742 buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter);
2743 buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
2744 if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
2746 buf->f_files = le32_to_cpu(es->s_inodes_count);
2747 buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);
2748 buf->f_namelen = EXT3_NAME_LEN;
2749 fsid = le64_to_cpup((void *)es->s_uuid) ^
2750 le64_to_cpup((void *)es->s_uuid + sizeof(u64));
2751 buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
2752 buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
2756 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2757 * is locked for write. Otherwise the are possible deadlocks:
2758 * Process 1 Process 2
2759 * ext3_create() quota_sync()
2760 * journal_start() write_dquot()
2761 * dquot_initialize() down(dqio_mutex)
2762 * down(dqio_mutex) journal_start()
2768 static inline struct inode *dquot_to_inode(struct dquot *dquot)
2770 return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
2773 static int ext3_write_dquot(struct dquot *dquot)
2777 struct inode *inode;
2779 inode = dquot_to_inode(dquot);
2780 handle = ext3_journal_start(inode,
2781 EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2783 return PTR_ERR(handle);
2784 ret = dquot_commit(dquot);
2785 err = ext3_journal_stop(handle);
2791 static int ext3_acquire_dquot(struct dquot *dquot)
2796 handle = ext3_journal_start(dquot_to_inode(dquot),
2797 EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2799 return PTR_ERR(handle);
2800 ret = dquot_acquire(dquot);
2801 err = ext3_journal_stop(handle);
2807 static int ext3_release_dquot(struct dquot *dquot)
2812 handle = ext3_journal_start(dquot_to_inode(dquot),
2813 EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2814 if (IS_ERR(handle)) {
2815 /* Release dquot anyway to avoid endless cycle in dqput() */
2816 dquot_release(dquot);
2817 return PTR_ERR(handle);
2819 ret = dquot_release(dquot);
2820 err = ext3_journal_stop(handle);
2826 static int ext3_mark_dquot_dirty(struct dquot *dquot)
2828 /* Are we journaling quotas? */
2829 if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2830 EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2831 dquot_mark_dquot_dirty(dquot);
2832 return ext3_write_dquot(dquot);
2834 return dquot_mark_dquot_dirty(dquot);
2838 static int ext3_write_info(struct super_block *sb, int type)
2843 /* Data block + inode block */
2844 handle = ext3_journal_start(sb->s_root->d_inode, 2);
2846 return PTR_ERR(handle);
2847 ret = dquot_commit_info(sb, type);
2848 err = ext3_journal_stop(handle);
2855 * Turn on quotas during mount time - we need to find
2856 * the quota file and such...
2858 static int ext3_quota_on_mount(struct super_block *sb, int type)
2860 return dquot_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type],
2861 EXT3_SB(sb)->s_jquota_fmt, type);
2865 * Standard function to be called on quota_on
2867 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
2873 if (!test_opt(sb, QUOTA))
2876 err = kern_path(name, LOOKUP_FOLLOW, &path);
2880 /* Quotafile not on the same filesystem? */
2881 if (path.mnt->mnt_sb != sb) {
2885 /* Journaling quota? */
2886 if (EXT3_SB(sb)->s_qf_names[type]) {
2887 /* Quotafile not of fs root? */
2888 if (path.dentry->d_parent != sb->s_root)
2889 ext3_msg(sb, KERN_WARNING,
2890 "warning: Quota file not on filesystem root. "
2891 "Journaled quota will not work.");
2895 * When we journal data on quota file, we have to flush journal to see
2896 * all updates to the file when we bypass pagecache...
2898 if (ext3_should_journal_data(path.dentry->d_inode)) {
2900 * We don't need to lock updates but journal_flush() could
2901 * otherwise be livelocked...
2903 journal_lock_updates(EXT3_SB(sb)->s_journal);
2904 err = journal_flush(EXT3_SB(sb)->s_journal);
2905 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2912 err = dquot_quota_on_path(sb, type, format_id, &path);
2917 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2918 * acquiring the locks... As quota files are never truncated and quota code
2919 * itself serializes the operations (and noone else should touch the files)
2920 * we don't have to be afraid of races */
2921 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
2922 size_t len, loff_t off)
2924 struct inode *inode = sb_dqopt(sb)->files[type];
2925 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2927 int offset = off & (sb->s_blocksize - 1);
2930 struct buffer_head *bh;
2931 loff_t i_size = i_size_read(inode);
2935 if (off+len > i_size)
2938 while (toread > 0) {
2939 tocopy = sb->s_blocksize - offset < toread ?
2940 sb->s_blocksize - offset : toread;
2941 bh = ext3_bread(NULL, inode, blk, 0, &err);
2944 if (!bh) /* A hole? */
2945 memset(data, 0, tocopy);
2947 memcpy(data, bh->b_data+offset, tocopy);
2957 /* Write to quotafile (we know the transaction is already started and has
2958 * enough credits) */
2959 static ssize_t ext3_quota_write(struct super_block *sb, int type,
2960 const char *data, size_t len, loff_t off)
2962 struct inode *inode = sb_dqopt(sb)->files[type];
2963 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2965 int offset = off & (sb->s_blocksize - 1);
2966 int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL;
2967 struct buffer_head *bh;
2968 handle_t *handle = journal_current_handle();
2971 ext3_msg(sb, KERN_WARNING,
2972 "warning: quota write (off=%llu, len=%llu)"
2973 " cancelled because transaction is not started.",
2974 (unsigned long long)off, (unsigned long long)len);
2979 * Since we account only one data block in transaction credits,
2980 * then it is impossible to cross a block boundary.
2982 if (sb->s_blocksize - offset < len) {
2983 ext3_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)"
2984 " cancelled because not block aligned",
2985 (unsigned long long)off, (unsigned long long)len);
2988 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2989 bh = ext3_bread(handle, inode, blk, 1, &err);
2992 if (journal_quota) {
2993 err = ext3_journal_get_write_access(handle, bh);
3000 memcpy(bh->b_data+offset, data, len);
3001 flush_dcache_page(bh->b_page);
3004 err = ext3_journal_dirty_metadata(handle, bh);
3006 /* Always do at least ordered writes for quotas */
3007 err = ext3_journal_dirty_data(handle, bh);
3008 mark_buffer_dirty(bh);
3013 mutex_unlock(&inode->i_mutex);
3016 if (inode->i_size < off + len) {
3017 i_size_write(inode, off + len);
3018 EXT3_I(inode)->i_disksize = inode->i_size;
3021 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
3022 ext3_mark_inode_dirty(handle, inode);
3023 mutex_unlock(&inode->i_mutex);
3029 static struct dentry *ext3_mount(struct file_system_type *fs_type,
3030 int flags, const char *dev_name, void *data)
3032 return mount_bdev(fs_type, flags, dev_name, data, ext3_fill_super);
3035 static struct file_system_type ext3_fs_type = {
3036 .owner = THIS_MODULE,
3038 .mount = ext3_mount,
3039 .kill_sb = kill_block_super,
3040 .fs_flags = FS_REQUIRES_DEV,
3043 static int __init init_ext3_fs(void)
3045 int err = init_ext3_xattr();
3048 err = init_inodecache();
3051 err = register_filesystem(&ext3_fs_type);
3056 destroy_inodecache();
3062 static void __exit exit_ext3_fs(void)
3064 unregister_filesystem(&ext3_fs_type);
3065 destroy_inodecache();
3069 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3070 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3071 MODULE_LICENSE("GPL");
3072 module_init(init_ext3_fs)
3073 module_exit(exit_ext3_fs)