2 * linux/fs/ext3/super.c
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
11 * linux/fs/minix/inode.c
13 * Copyright (C) 1991, 1992 Linus Torvalds
15 * Big-endian to little-endian byte-swapping/bitmaps by
16 * David S. Miller (davem@caip.rutgers.edu), 1995
19 #include <linux/module.h>
20 #include <linux/string.h>
22 #include <linux/time.h>
23 #include <linux/jbd.h>
24 #include <linux/ext3_fs.h>
25 #include <linux/ext3_jbd.h>
26 #include <linux/slab.h>
27 #include <linux/init.h>
28 #include <linux/blkdev.h>
29 #include <linux/parser.h>
30 #include <linux/smp_lock.h>
31 #include <linux/buffer_head.h>
32 #include <linux/exportfs.h>
33 #include <linux/vfs.h>
34 #include <linux/random.h>
35 #include <linux/mount.h>
36 #include <linux/namei.h>
37 #include <linux/quotaops.h>
38 #include <linux/seq_file.h>
39 #include <linux/log2.h>
41 #include <asm/uaccess.h>
47 #ifdef CONFIG_EXT3_DEFAULTS_TO_ORDERED
48 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_ORDERED_DATA
50 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_WRITEBACK_DATA
53 static int ext3_load_journal(struct super_block *, struct ext3_super_block *,
54 unsigned long journal_devnum);
55 static int ext3_create_journal(struct super_block *, struct ext3_super_block *,
57 static int ext3_commit_super(struct super_block *sb,
58 struct ext3_super_block *es,
60 static void ext3_mark_recovery_complete(struct super_block * sb,
61 struct ext3_super_block * es);
62 static void ext3_clear_journal_err(struct super_block * sb,
63 struct ext3_super_block * es);
64 static int ext3_sync_fs(struct super_block *sb, int wait);
65 static const char *ext3_decode_error(struct super_block * sb, int errno,
67 static int ext3_remount (struct super_block * sb, int * flags, char * data);
68 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf);
69 static int ext3_unfreeze(struct super_block *sb);
70 static int ext3_freeze(struct super_block *sb);
73 * Wrappers for journal_start/end.
75 * The only special thing we need to do here is to make sure that all
76 * journal_end calls result in the superblock being marked dirty, so
77 * that sync() will call the filesystem's write_super callback if
80 handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
84 if (sb->s_flags & MS_RDONLY)
85 return ERR_PTR(-EROFS);
87 /* Special case here: if the journal has aborted behind our
88 * backs (eg. EIO in the commit thread), then we still need to
89 * take the FS itself readonly cleanly. */
90 journal = EXT3_SB(sb)->s_journal;
91 if (is_journal_aborted(journal)) {
92 ext3_abort(sb, __func__,
93 "Detected aborted journal");
94 return ERR_PTR(-EROFS);
97 return journal_start(journal, nblocks);
101 * The only special thing we need to do here is to make sure that all
102 * journal_stop calls result in the superblock being marked dirty, so
103 * that sync() will call the filesystem's write_super callback if
106 int __ext3_journal_stop(const char *where, handle_t *handle)
108 struct super_block *sb;
112 sb = handle->h_transaction->t_journal->j_private;
114 rc = journal_stop(handle);
119 __ext3_std_error(sb, where, err);
123 void ext3_journal_abort_handle(const char *caller, const char *err_fn,
124 struct buffer_head *bh, handle_t *handle, int err)
127 const char *errstr = ext3_decode_error(NULL, err, nbuf);
130 BUFFER_TRACE(bh, "abort");
135 if (is_handle_aborted(handle))
138 printk(KERN_ERR "EXT3-fs: %s: aborting transaction: %s in %s\n",
139 caller, errstr, err_fn);
141 journal_abort_handle(handle);
144 void ext3_msg(struct super_block *sb, const char *prefix,
145 const char *fmt, ...)
150 printk("%sEXT3-fs (%s): ", prefix, sb->s_id);
156 /* Deal with the reporting of failure conditions on a filesystem such as
157 * inconsistencies detected or read IO failures.
159 * On ext2, we can store the error state of the filesystem in the
160 * superblock. That is not possible on ext3, because we may have other
161 * write ordering constraints on the superblock which prevent us from
162 * writing it out straight away; and given that the journal is about to
163 * be aborted, we can't rely on the current, or future, transactions to
164 * write out the superblock safely.
166 * We'll just use the journal_abort() error code to record an error in
167 * the journal instead. On recovery, the journal will compain about
168 * that error until we've noted it down and cleared it.
171 static void ext3_handle_error(struct super_block *sb)
173 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
175 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
176 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
178 if (sb->s_flags & MS_RDONLY)
181 if (!test_opt (sb, ERRORS_CONT)) {
182 journal_t *journal = EXT3_SB(sb)->s_journal;
184 set_opt(EXT3_SB(sb)->s_mount_opt, ABORT);
186 journal_abort(journal, -EIO);
188 if (test_opt (sb, ERRORS_RO)) {
189 ext3_msg(sb, KERN_CRIT,
190 "error: remounting filesystem read-only");
191 sb->s_flags |= MS_RDONLY;
193 ext3_commit_super(sb, es, 1);
194 if (test_opt(sb, ERRORS_PANIC))
195 panic("EXT3-fs (%s): panic forced after error\n",
199 void ext3_error (struct super_block * sb, const char * function,
200 const char * fmt, ...)
205 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
210 ext3_handle_error(sb);
213 static const char *ext3_decode_error(struct super_block * sb, int errno,
220 errstr = "IO failure";
223 errstr = "Out of memory";
226 if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT)
227 errstr = "Journal has aborted";
229 errstr = "Readonly filesystem";
232 /* If the caller passed in an extra buffer for unknown
233 * errors, textualise them now. Else we just return
236 /* Check for truncated error codes... */
237 if (snprintf(nbuf, 16, "error %d", -errno) >= 0)
246 /* __ext3_std_error decodes expected errors from journaling functions
247 * automatically and invokes the appropriate error response. */
249 void __ext3_std_error (struct super_block * sb, const char * function,
255 /* Special case: if the error is EROFS, and we're not already
256 * inside a transaction, then there's really no point in logging
258 if (errno == -EROFS && journal_current_handle() == NULL &&
259 (sb->s_flags & MS_RDONLY))
262 errstr = ext3_decode_error(sb, errno, nbuf);
263 ext3_msg(sb, KERN_CRIT, "error in %s: %s", function, errstr);
265 ext3_handle_error(sb);
269 * ext3_abort is a much stronger failure handler than ext3_error. The
270 * abort function may be used to deal with unrecoverable failures such
271 * as journal IO errors or ENOMEM at a critical moment in log management.
273 * We unconditionally force the filesystem into an ABORT|READONLY state,
274 * unless the error response on the fs has been set to panic in which
275 * case we take the easy way out and panic immediately.
278 void ext3_abort (struct super_block * sb, const char * function,
279 const char * fmt, ...)
284 printk(KERN_CRIT "EXT3-fs (%s): error: %s: ", sb->s_id, function);
289 if (test_opt(sb, ERRORS_PANIC))
290 panic("EXT3-fs: panic from previous error\n");
292 if (sb->s_flags & MS_RDONLY)
295 ext3_msg(sb, KERN_CRIT,
296 "error: remounting filesystem read-only");
297 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
298 sb->s_flags |= MS_RDONLY;
299 set_opt(EXT3_SB(sb)->s_mount_opt, ABORT);
300 if (EXT3_SB(sb)->s_journal)
301 journal_abort(EXT3_SB(sb)->s_journal, -EIO);
304 void ext3_warning (struct super_block * sb, const char * function,
305 const char * fmt, ...)
310 printk(KERN_WARNING "EXT3-fs (%s): warning: %s: ",
317 void ext3_update_dynamic_rev(struct super_block *sb)
319 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
321 if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV)
324 ext3_msg(sb, KERN_WARNING,
325 "warning: updating to rev %d because of "
326 "new feature flag, running e2fsck is recommended",
329 es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO);
330 es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE);
331 es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV);
332 /* leave es->s_feature_*compat flags alone */
333 /* es->s_uuid will be set by e2fsck if empty */
336 * The rest of the superblock fields should be zero, and if not it
337 * means they are likely already in use, so leave them alone. We
338 * can leave it up to e2fsck to clean up any inconsistencies there.
343 * Open the external journal device
345 static struct block_device *ext3_blkdev_get(dev_t dev, struct super_block *sb)
347 struct block_device *bdev;
348 char b[BDEVNAME_SIZE];
350 bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE);
356 ext3_msg(sb, "error: failed to open journal device %s: %ld",
357 __bdevname(dev, b), PTR_ERR(bdev));
363 * Release the journal device
365 static int ext3_blkdev_put(struct block_device *bdev)
368 return blkdev_put(bdev, FMODE_READ|FMODE_WRITE);
371 static int ext3_blkdev_remove(struct ext3_sb_info *sbi)
373 struct block_device *bdev;
376 bdev = sbi->journal_bdev;
378 ret = ext3_blkdev_put(bdev);
379 sbi->journal_bdev = NULL;
384 static inline struct inode *orphan_list_entry(struct list_head *l)
386 return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode;
389 static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
393 ext3_msg(sb, KERN_ERR, "error: sb orphan head is %d",
394 le32_to_cpu(sbi->s_es->s_last_orphan));
396 ext3_msg(sb, KERN_ERR, "sb_info orphan list:");
397 list_for_each(l, &sbi->s_orphan) {
398 struct inode *inode = orphan_list_entry(l);
399 ext3_msg(sb, KERN_ERR, " "
400 "inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
401 inode->i_sb->s_id, inode->i_ino, inode,
402 inode->i_mode, inode->i_nlink,
407 static void ext3_put_super (struct super_block * sb)
409 struct ext3_sb_info *sbi = EXT3_SB(sb);
410 struct ext3_super_block *es = sbi->s_es;
415 ext3_xattr_put_super(sb);
416 err = journal_destroy(sbi->s_journal);
417 sbi->s_journal = NULL;
419 ext3_abort(sb, __func__, "Couldn't clean up the journal");
421 if (!(sb->s_flags & MS_RDONLY)) {
422 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
423 es->s_state = cpu_to_le16(sbi->s_mount_state);
424 BUFFER_TRACE(sbi->s_sbh, "marking dirty");
425 mark_buffer_dirty(sbi->s_sbh);
426 ext3_commit_super(sb, es, 1);
429 for (i = 0; i < sbi->s_gdb_count; i++)
430 brelse(sbi->s_group_desc[i]);
431 kfree(sbi->s_group_desc);
432 percpu_counter_destroy(&sbi->s_freeblocks_counter);
433 percpu_counter_destroy(&sbi->s_freeinodes_counter);
434 percpu_counter_destroy(&sbi->s_dirs_counter);
437 for (i = 0; i < MAXQUOTAS; i++)
438 kfree(sbi->s_qf_names[i]);
441 /* Debugging code just in case the in-memory inode orphan list
442 * isn't empty. The on-disk one can be non-empty if we've
443 * detected an error and taken the fs readonly, but the
444 * in-memory list had better be clean by this point. */
445 if (!list_empty(&sbi->s_orphan))
446 dump_orphan_list(sb, sbi);
447 J_ASSERT(list_empty(&sbi->s_orphan));
449 invalidate_bdev(sb->s_bdev);
450 if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) {
452 * Invalidate the journal device's buffers. We don't want them
453 * floating about in memory - the physical journal device may
454 * hotswapped, and it breaks the `ro-after' testing code.
456 sync_blockdev(sbi->journal_bdev);
457 invalidate_bdev(sbi->journal_bdev);
458 ext3_blkdev_remove(sbi);
460 sb->s_fs_info = NULL;
461 kfree(sbi->s_blockgroup_lock);
467 static struct kmem_cache *ext3_inode_cachep;
470 * Called inside transaction, so use GFP_NOFS
472 static struct inode *ext3_alloc_inode(struct super_block *sb)
474 struct ext3_inode_info *ei;
476 ei = kmem_cache_alloc(ext3_inode_cachep, GFP_NOFS);
479 ei->i_block_alloc_info = NULL;
480 ei->vfs_inode.i_version = 1;
481 atomic_set(&ei->i_datasync_tid, 0);
482 atomic_set(&ei->i_sync_tid, 0);
483 return &ei->vfs_inode;
486 static void ext3_destroy_inode(struct inode *inode)
488 if (!list_empty(&(EXT3_I(inode)->i_orphan))) {
489 printk("EXT3 Inode %p: orphan list check failed!\n",
491 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4,
492 EXT3_I(inode), sizeof(struct ext3_inode_info),
496 kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
499 static void init_once(void *foo)
501 struct ext3_inode_info *ei = (struct ext3_inode_info *) foo;
503 INIT_LIST_HEAD(&ei->i_orphan);
504 #ifdef CONFIG_EXT3_FS_XATTR
505 init_rwsem(&ei->xattr_sem);
507 mutex_init(&ei->truncate_mutex);
508 inode_init_once(&ei->vfs_inode);
511 static int init_inodecache(void)
513 ext3_inode_cachep = kmem_cache_create("ext3_inode_cache",
514 sizeof(struct ext3_inode_info),
515 0, (SLAB_RECLAIM_ACCOUNT|
518 if (ext3_inode_cachep == NULL)
523 static void destroy_inodecache(void)
525 kmem_cache_destroy(ext3_inode_cachep);
528 static void ext3_clear_inode(struct inode *inode)
530 struct ext3_block_alloc_info *rsv = EXT3_I(inode)->i_block_alloc_info;
533 ext3_discard_reservation(inode);
534 EXT3_I(inode)->i_block_alloc_info = NULL;
539 static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb)
541 #if defined(CONFIG_QUOTA)
542 struct ext3_sb_info *sbi = EXT3_SB(sb);
544 if (sbi->s_jquota_fmt) {
547 switch (sbi->s_jquota_fmt) {
558 seq_printf(seq, ",jqfmt=%s", fmtname);
561 if (sbi->s_qf_names[USRQUOTA])
562 seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]);
564 if (sbi->s_qf_names[GRPQUOTA])
565 seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]);
567 if (test_opt(sb, USRQUOTA))
568 seq_puts(seq, ",usrquota");
570 if (test_opt(sb, GRPQUOTA))
571 seq_puts(seq, ",grpquota");
575 static char *data_mode_string(unsigned long mode)
578 case EXT3_MOUNT_JOURNAL_DATA:
580 case EXT3_MOUNT_ORDERED_DATA:
582 case EXT3_MOUNT_WRITEBACK_DATA:
590 * - it's set to a non-default value OR
591 * - if the per-sb default is different from the global default
593 static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
595 struct super_block *sb = vfs->mnt_sb;
596 struct ext3_sb_info *sbi = EXT3_SB(sb);
597 struct ext3_super_block *es = sbi->s_es;
598 unsigned long def_mount_opts;
600 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
602 if (sbi->s_sb_block != 1)
603 seq_printf(seq, ",sb=%lu", sbi->s_sb_block);
604 if (test_opt(sb, MINIX_DF))
605 seq_puts(seq, ",minixdf");
606 if (test_opt(sb, GRPID))
607 seq_puts(seq, ",grpid");
608 if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS))
609 seq_puts(seq, ",nogrpid");
610 if (sbi->s_resuid != EXT3_DEF_RESUID ||
611 le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) {
612 seq_printf(seq, ",resuid=%u", sbi->s_resuid);
614 if (sbi->s_resgid != EXT3_DEF_RESGID ||
615 le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) {
616 seq_printf(seq, ",resgid=%u", sbi->s_resgid);
618 if (test_opt(sb, ERRORS_RO)) {
619 int def_errors = le16_to_cpu(es->s_errors);
621 if (def_errors == EXT3_ERRORS_PANIC ||
622 def_errors == EXT3_ERRORS_CONTINUE) {
623 seq_puts(seq, ",errors=remount-ro");
626 if (test_opt(sb, ERRORS_CONT))
627 seq_puts(seq, ",errors=continue");
628 if (test_opt(sb, ERRORS_PANIC))
629 seq_puts(seq, ",errors=panic");
630 if (test_opt(sb, NO_UID32))
631 seq_puts(seq, ",nouid32");
632 if (test_opt(sb, DEBUG))
633 seq_puts(seq, ",debug");
634 if (test_opt(sb, OLDALLOC))
635 seq_puts(seq, ",oldalloc");
636 #ifdef CONFIG_EXT3_FS_XATTR
637 if (test_opt(sb, XATTR_USER))
638 seq_puts(seq, ",user_xattr");
639 if (!test_opt(sb, XATTR_USER) &&
640 (def_mount_opts & EXT3_DEFM_XATTR_USER)) {
641 seq_puts(seq, ",nouser_xattr");
644 #ifdef CONFIG_EXT3_FS_POSIX_ACL
645 if (test_opt(sb, POSIX_ACL))
646 seq_puts(seq, ",acl");
647 if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL))
648 seq_puts(seq, ",noacl");
650 if (!test_opt(sb, RESERVATION))
651 seq_puts(seq, ",noreservation");
652 if (sbi->s_commit_interval) {
653 seq_printf(seq, ",commit=%u",
654 (unsigned) (sbi->s_commit_interval / HZ));
656 if (test_opt(sb, BARRIER))
657 seq_puts(seq, ",barrier=1");
658 if (test_opt(sb, NOBH))
659 seq_puts(seq, ",nobh");
661 seq_printf(seq, ",data=%s", data_mode_string(test_opt(sb, DATA_FLAGS)));
662 if (test_opt(sb, DATA_ERR_ABORT))
663 seq_puts(seq, ",data_err=abort");
665 if (test_opt(sb, NOLOAD))
666 seq_puts(seq, ",norecovery");
668 ext3_show_quota_options(seq, sb);
674 static struct inode *ext3_nfs_get_inode(struct super_block *sb,
675 u64 ino, u32 generation)
679 if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO)
680 return ERR_PTR(-ESTALE);
681 if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count))
682 return ERR_PTR(-ESTALE);
684 /* iget isn't really right if the inode is currently unallocated!!
686 * ext3_read_inode will return a bad_inode if the inode had been
687 * deleted, so we should be safe.
689 * Currently we don't know the generation for parent directory, so
690 * a generation of 0 means "accept any"
692 inode = ext3_iget(sb, ino);
694 return ERR_CAST(inode);
695 if (generation && inode->i_generation != generation) {
697 return ERR_PTR(-ESTALE);
703 static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid,
704 int fh_len, int fh_type)
706 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
710 static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid,
711 int fh_len, int fh_type)
713 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
718 * Try to release metadata pages (indirect blocks, directories) which are
719 * mapped via the block device. Since these pages could have journal heads
720 * which would prevent try_to_free_buffers() from freeing them, we must use
721 * jbd layer's try_to_free_buffers() function to release them.
723 static int bdev_try_to_free_page(struct super_block *sb, struct page *page,
726 journal_t *journal = EXT3_SB(sb)->s_journal;
728 WARN_ON(PageChecked(page));
729 if (!page_has_buffers(page))
732 return journal_try_to_free_buffers(journal, page,
734 return try_to_free_buffers(page);
738 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
739 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
741 static int ext3_write_dquot(struct dquot *dquot);
742 static int ext3_acquire_dquot(struct dquot *dquot);
743 static int ext3_release_dquot(struct dquot *dquot);
744 static int ext3_mark_dquot_dirty(struct dquot *dquot);
745 static int ext3_write_info(struct super_block *sb, int type);
746 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
747 char *path, int remount);
748 static int ext3_quota_on_mount(struct super_block *sb, int type);
749 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
750 size_t len, loff_t off);
751 static ssize_t ext3_quota_write(struct super_block *sb, int type,
752 const char *data, size_t len, loff_t off);
754 static const struct dquot_operations ext3_quota_operations = {
755 .initialize = dquot_initialize,
756 .write_dquot = ext3_write_dquot,
757 .acquire_dquot = ext3_acquire_dquot,
758 .release_dquot = ext3_release_dquot,
759 .mark_dirty = ext3_mark_dquot_dirty,
760 .write_info = ext3_write_info,
761 .alloc_dquot = dquot_alloc,
762 .destroy_dquot = dquot_destroy,
765 static const struct quotactl_ops ext3_qctl_operations = {
766 .quota_on = ext3_quota_on,
767 .quota_off = vfs_quota_off,
768 .quota_sync = vfs_quota_sync,
769 .get_info = vfs_get_dqinfo,
770 .set_info = vfs_set_dqinfo,
771 .get_dqblk = vfs_get_dqblk,
772 .set_dqblk = vfs_set_dqblk
776 static const struct super_operations ext3_sops = {
777 .alloc_inode = ext3_alloc_inode,
778 .destroy_inode = ext3_destroy_inode,
779 .write_inode = ext3_write_inode,
780 .dirty_inode = ext3_dirty_inode,
781 .delete_inode = ext3_delete_inode,
782 .put_super = ext3_put_super,
783 .sync_fs = ext3_sync_fs,
784 .freeze_fs = ext3_freeze,
785 .unfreeze_fs = ext3_unfreeze,
786 .statfs = ext3_statfs,
787 .remount_fs = ext3_remount,
788 .clear_inode = ext3_clear_inode,
789 .show_options = ext3_show_options,
791 .quota_read = ext3_quota_read,
792 .quota_write = ext3_quota_write,
794 .bdev_try_to_free_page = bdev_try_to_free_page,
797 static const struct export_operations ext3_export_ops = {
798 .fh_to_dentry = ext3_fh_to_dentry,
799 .fh_to_parent = ext3_fh_to_parent,
800 .get_parent = ext3_get_parent,
804 Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
805 Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
806 Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
807 Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
808 Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
809 Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
810 Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
811 Opt_data_err_abort, Opt_data_err_ignore,
812 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
813 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota,
814 Opt_noquota, Opt_ignore, Opt_barrier, Opt_err, Opt_resize,
815 Opt_usrquota, Opt_grpquota
818 static const match_table_t tokens = {
819 {Opt_bsd_df, "bsddf"},
820 {Opt_minix_df, "minixdf"},
821 {Opt_grpid, "grpid"},
822 {Opt_grpid, "bsdgroups"},
823 {Opt_nogrpid, "nogrpid"},
824 {Opt_nogrpid, "sysvgroups"},
825 {Opt_resgid, "resgid=%u"},
826 {Opt_resuid, "resuid=%u"},
828 {Opt_err_cont, "errors=continue"},
829 {Opt_err_panic, "errors=panic"},
830 {Opt_err_ro, "errors=remount-ro"},
831 {Opt_nouid32, "nouid32"},
832 {Opt_nocheck, "nocheck"},
833 {Opt_nocheck, "check=none"},
834 {Opt_debug, "debug"},
835 {Opt_oldalloc, "oldalloc"},
836 {Opt_orlov, "orlov"},
837 {Opt_user_xattr, "user_xattr"},
838 {Opt_nouser_xattr, "nouser_xattr"},
840 {Opt_noacl, "noacl"},
841 {Opt_reservation, "reservation"},
842 {Opt_noreservation, "noreservation"},
843 {Opt_noload, "noload"},
844 {Opt_noload, "norecovery"},
847 {Opt_commit, "commit=%u"},
848 {Opt_journal_update, "journal=update"},
849 {Opt_journal_inum, "journal=%u"},
850 {Opt_journal_dev, "journal_dev=%u"},
851 {Opt_abort, "abort"},
852 {Opt_data_journal, "data=journal"},
853 {Opt_data_ordered, "data=ordered"},
854 {Opt_data_writeback, "data=writeback"},
855 {Opt_data_err_abort, "data_err=abort"},
856 {Opt_data_err_ignore, "data_err=ignore"},
857 {Opt_offusrjquota, "usrjquota="},
858 {Opt_usrjquota, "usrjquota=%s"},
859 {Opt_offgrpjquota, "grpjquota="},
860 {Opt_grpjquota, "grpjquota=%s"},
861 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
862 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
863 {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
864 {Opt_grpquota, "grpquota"},
865 {Opt_noquota, "noquota"},
866 {Opt_quota, "quota"},
867 {Opt_usrquota, "usrquota"},
868 {Opt_barrier, "barrier=%u"},
869 {Opt_resize, "resize"},
873 static ext3_fsblk_t get_sb_block(void **data, struct super_block *sb)
875 ext3_fsblk_t sb_block;
876 char *options = (char *) *data;
878 if (!options || strncmp(options, "sb=", 3) != 0)
879 return 1; /* Default location */
881 /*todo: use simple_strtoll with >32bit ext3 */
882 sb_block = simple_strtoul(options, &options, 0);
883 if (*options && *options != ',') {
884 ext3_msg(sb, "error: invalid sb specification: %s",
890 *data = (void *) options;
895 static int set_qf_name(struct super_block *sb, int qtype, substring_t *args)
897 struct ext3_sb_info *sbi = EXT3_SB(sb);
900 if (sb_any_quota_loaded(sb) &&
901 !sbi->s_qf_names[qtype]) {
902 ext3_msg(sb, KERN_ERR,
903 "Cannot change journaled "
904 "quota options when quota turned on");
907 qname = match_strdup(args);
909 ext3_msg(sb, KERN_ERR,
910 "Not enough memory for storing quotafile name");
913 if (sbi->s_qf_names[qtype] &&
914 strcmp(sbi->s_qf_names[qtype], qname)) {
915 ext3_msg(sb, KERN_ERR,
916 "%s quota file already specified", QTYPE2NAME(qtype));
920 sbi->s_qf_names[qtype] = qname;
921 if (strchr(sbi->s_qf_names[qtype], '/')) {
922 ext3_msg(sb, KERN_ERR,
923 "quotafile must be on filesystem root");
924 kfree(sbi->s_qf_names[qtype]);
925 sbi->s_qf_names[qtype] = NULL;
928 set_opt(sbi->s_mount_opt, QUOTA);
932 static int clear_qf_name(struct super_block *sb, int qtype) {
934 struct ext3_sb_info *sbi = EXT3_SB(sb);
936 if (sb_any_quota_loaded(sb) &&
937 sbi->s_qf_names[qtype]) {
938 ext3_msg(sb, KERN_ERR, "Cannot change journaled quota options"
939 " when quota turned on");
943 * The space will be released later when all options are confirmed
946 sbi->s_qf_names[qtype] = NULL;
951 static int parse_options (char *options, struct super_block *sb,
952 unsigned int *inum, unsigned long *journal_devnum,
953 ext3_fsblk_t *n_blocks_count, int is_remount)
955 struct ext3_sb_info *sbi = EXT3_SB(sb);
957 substring_t args[MAX_OPT_ARGS];
967 while ((p = strsep (&options, ",")) != NULL) {
972 token = match_token(p, tokens, args);
975 clear_opt (sbi->s_mount_opt, MINIX_DF);
978 set_opt (sbi->s_mount_opt, MINIX_DF);
981 set_opt (sbi->s_mount_opt, GRPID);
984 clear_opt (sbi->s_mount_opt, GRPID);
987 if (match_int(&args[0], &option))
989 sbi->s_resuid = option;
992 if (match_int(&args[0], &option))
994 sbi->s_resgid = option;
997 /* handled by get_sb_block() instead of here */
998 /* *sb_block = match_int(&args[0]); */
1001 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
1002 clear_opt (sbi->s_mount_opt, ERRORS_RO);
1003 set_opt (sbi->s_mount_opt, ERRORS_PANIC);
1006 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
1007 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
1008 set_opt (sbi->s_mount_opt, ERRORS_RO);
1011 clear_opt (sbi->s_mount_opt, ERRORS_RO);
1012 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
1013 set_opt (sbi->s_mount_opt, ERRORS_CONT);
1016 set_opt (sbi->s_mount_opt, NO_UID32);
1019 clear_opt (sbi->s_mount_opt, CHECK);
1022 set_opt (sbi->s_mount_opt, DEBUG);
1025 set_opt (sbi->s_mount_opt, OLDALLOC);
1028 clear_opt (sbi->s_mount_opt, OLDALLOC);
1030 #ifdef CONFIG_EXT3_FS_XATTR
1031 case Opt_user_xattr:
1032 set_opt (sbi->s_mount_opt, XATTR_USER);
1034 case Opt_nouser_xattr:
1035 clear_opt (sbi->s_mount_opt, XATTR_USER);
1038 case Opt_user_xattr:
1039 case Opt_nouser_xattr:
1040 ext3_msg(sb, KERN_INFO,
1041 "(no)user_xattr options not supported");
1044 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1046 set_opt(sbi->s_mount_opt, POSIX_ACL);
1049 clear_opt(sbi->s_mount_opt, POSIX_ACL);
1054 ext3_msg(sb, KERN_INFO,
1055 "(no)acl options not supported");
1058 case Opt_reservation:
1059 set_opt(sbi->s_mount_opt, RESERVATION);
1061 case Opt_noreservation:
1062 clear_opt(sbi->s_mount_opt, RESERVATION);
1064 case Opt_journal_update:
1066 /* Eventually we will want to be able to create
1067 a journal file here. For now, only allow the
1068 user to specify an existing inode to be the
1071 ext3_msg(sb, KERN_ERR, "error: cannot specify "
1072 "journal on remount");
1075 set_opt (sbi->s_mount_opt, UPDATE_JOURNAL);
1077 case Opt_journal_inum:
1079 ext3_msg(sb, KERN_ERR, "error: cannot specify "
1080 "journal on remount");
1083 if (match_int(&args[0], &option))
1087 case Opt_journal_dev:
1089 ext3_msg(sb, KERN_ERR, "error: cannot specify "
1090 "journal on remount");
1093 if (match_int(&args[0], &option))
1095 *journal_devnum = option;
1098 set_opt (sbi->s_mount_opt, NOLOAD);
1101 if (match_int(&args[0], &option))
1106 option = JBD_DEFAULT_MAX_COMMIT_AGE;
1107 sbi->s_commit_interval = HZ * option;
1109 case Opt_data_journal:
1110 data_opt = EXT3_MOUNT_JOURNAL_DATA;
1112 case Opt_data_ordered:
1113 data_opt = EXT3_MOUNT_ORDERED_DATA;
1115 case Opt_data_writeback:
1116 data_opt = EXT3_MOUNT_WRITEBACK_DATA;
1119 if (test_opt(sb, DATA_FLAGS) == data_opt)
1121 ext3_msg(sb, KERN_ERR,
1122 "error: cannot change "
1123 "data mode on remount. The filesystem "
1124 "is mounted in data=%s mode and you "
1125 "try to remount it in data=%s mode.",
1126 data_mode_string(test_opt(sb,
1128 data_mode_string(data_opt));
1131 clear_opt(sbi->s_mount_opt, DATA_FLAGS);
1132 sbi->s_mount_opt |= data_opt;
1135 case Opt_data_err_abort:
1136 set_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1138 case Opt_data_err_ignore:
1139 clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1143 if (!set_qf_name(sb, USRQUOTA, &args[0]))
1147 if (!set_qf_name(sb, GRPQUOTA, &args[0]))
1150 case Opt_offusrjquota:
1151 if (!clear_qf_name(sb, USRQUOTA))
1154 case Opt_offgrpjquota:
1155 if (!clear_qf_name(sb, GRPQUOTA))
1158 case Opt_jqfmt_vfsold:
1159 qfmt = QFMT_VFS_OLD;
1161 case Opt_jqfmt_vfsv0:
1164 case Opt_jqfmt_vfsv1:
1167 if (sb_any_quota_loaded(sb) &&
1168 sbi->s_jquota_fmt != qfmt) {
1169 ext3_msg(sb, KERN_ERR, "error: cannot change "
1170 "journaled quota options when "
1171 "quota turned on.");
1174 sbi->s_jquota_fmt = qfmt;
1178 set_opt(sbi->s_mount_opt, QUOTA);
1179 set_opt(sbi->s_mount_opt, USRQUOTA);
1182 set_opt(sbi->s_mount_opt, QUOTA);
1183 set_opt(sbi->s_mount_opt, GRPQUOTA);
1186 if (sb_any_quota_loaded(sb)) {
1187 ext3_msg(sb, KERN_ERR, "error: cannot change "
1188 "quota options when quota turned on.");
1191 clear_opt(sbi->s_mount_opt, QUOTA);
1192 clear_opt(sbi->s_mount_opt, USRQUOTA);
1193 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1199 ext3_msg(sb, KERN_ERR,
1200 "error: quota options not supported.");
1204 case Opt_offusrjquota:
1205 case Opt_offgrpjquota:
1206 case Opt_jqfmt_vfsold:
1207 case Opt_jqfmt_vfsv0:
1208 case Opt_jqfmt_vfsv1:
1209 ext3_msg(sb, KERN_ERR,
1210 "error: journaled quota options not "
1217 set_opt(sbi->s_mount_opt, ABORT);
1220 if (match_int(&args[0], &option))
1223 set_opt(sbi->s_mount_opt, BARRIER);
1225 clear_opt(sbi->s_mount_opt, BARRIER);
1231 ext3_msg(sb, KERN_ERR,
1232 "error: resize option only available "
1236 if (match_int(&args[0], &option) != 0)
1238 *n_blocks_count = option;
1241 set_opt(sbi->s_mount_opt, NOBH);
1244 clear_opt(sbi->s_mount_opt, NOBH);
1247 ext3_msg(sb, KERN_ERR,
1248 "error: unrecognized mount option \"%s\" "
1249 "or missing value", p);
1254 if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
1255 if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA])
1256 clear_opt(sbi->s_mount_opt, USRQUOTA);
1257 if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA])
1258 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1260 if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) {
1261 ext3_msg(sb, KERN_ERR, "error: old and new quota "
1266 if (!sbi->s_jquota_fmt) {
1267 ext3_msg(sb, KERN_ERR, "error: journaled quota format "
1272 if (sbi->s_jquota_fmt) {
1273 ext3_msg(sb, KERN_ERR, "error: journaled quota format "
1274 "specified with no journaling "
1283 static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es,
1286 struct ext3_sb_info *sbi = EXT3_SB(sb);
1289 if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) {
1290 ext3_msg(sb, KERN_ERR,
1291 "error: revision level too high, "
1292 "forcing read-only mode");
1297 if (!(sbi->s_mount_state & EXT3_VALID_FS))
1298 ext3_msg(sb, KERN_WARNING,
1299 "warning: mounting unchecked fs, "
1300 "running e2fsck is recommended");
1301 else if ((sbi->s_mount_state & EXT3_ERROR_FS))
1302 ext3_msg(sb, KERN_WARNING,
1303 "warning: mounting fs with errors, "
1304 "running e2fsck is recommended");
1305 else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 &&
1306 le16_to_cpu(es->s_mnt_count) >=
1307 (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))
1308 ext3_msg(sb, KERN_WARNING,
1309 "warning: maximal mount count reached, "
1310 "running e2fsck is recommended");
1311 else if (le32_to_cpu(es->s_checkinterval) &&
1312 (le32_to_cpu(es->s_lastcheck) +
1313 le32_to_cpu(es->s_checkinterval) <= get_seconds()))
1314 ext3_msg(sb, KERN_WARNING,
1315 "warning: checktime reached, "
1316 "running e2fsck is recommended");
1318 /* @@@ We _will_ want to clear the valid bit if we find
1319 inconsistencies, to force a fsck at reboot. But for
1320 a plain journaled filesystem we can keep it set as
1321 valid forever! :) */
1322 es->s_state &= cpu_to_le16(~EXT3_VALID_FS);
1324 if (!(__s16) le16_to_cpu(es->s_max_mnt_count))
1325 es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT);
1326 le16_add_cpu(&es->s_mnt_count, 1);
1327 es->s_mtime = cpu_to_le32(get_seconds());
1328 ext3_update_dynamic_rev(sb);
1329 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
1331 ext3_commit_super(sb, es, 1);
1332 if (test_opt(sb, DEBUG))
1333 ext3_msg(sb, KERN_INFO, "[bs=%lu, gc=%lu, "
1334 "bpg=%lu, ipg=%lu, mo=%04lx]",
1336 sbi->s_groups_count,
1337 EXT3_BLOCKS_PER_GROUP(sb),
1338 EXT3_INODES_PER_GROUP(sb),
1341 if (EXT3_SB(sb)->s_journal->j_inode == NULL) {
1342 char b[BDEVNAME_SIZE];
1343 ext3_msg(sb, KERN_INFO, "using external journal on %s",
1344 bdevname(EXT3_SB(sb)->s_journal->j_dev, b));
1346 ext3_msg(sb, KERN_INFO, "using internal journal");
1351 /* Called at mount-time, super-block is locked */
1352 static int ext3_check_descriptors(struct super_block *sb)
1354 struct ext3_sb_info *sbi = EXT3_SB(sb);
1357 ext3_debug ("Checking group descriptors");
1359 for (i = 0; i < sbi->s_groups_count; i++) {
1360 struct ext3_group_desc *gdp = ext3_get_group_desc(sb, i, NULL);
1361 ext3_fsblk_t first_block = ext3_group_first_block_no(sb, i);
1362 ext3_fsblk_t last_block;
1364 if (i == sbi->s_groups_count - 1)
1365 last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
1367 last_block = first_block +
1368 (EXT3_BLOCKS_PER_GROUP(sb) - 1);
1370 if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
1371 le32_to_cpu(gdp->bg_block_bitmap) > last_block)
1373 ext3_error (sb, "ext3_check_descriptors",
1374 "Block bitmap for group %d"
1375 " not in group (block %lu)!",
1377 le32_to_cpu(gdp->bg_block_bitmap));
1380 if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block ||
1381 le32_to_cpu(gdp->bg_inode_bitmap) > last_block)
1383 ext3_error (sb, "ext3_check_descriptors",
1384 "Inode bitmap for group %d"
1385 " not in group (block %lu)!",
1387 le32_to_cpu(gdp->bg_inode_bitmap));
1390 if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
1391 le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 >
1394 ext3_error (sb, "ext3_check_descriptors",
1395 "Inode table for group %d"
1396 " not in group (block %lu)!",
1398 le32_to_cpu(gdp->bg_inode_table));
1403 sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb));
1404 sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb));
1409 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1410 * the superblock) which were deleted from all directories, but held open by
1411 * a process at the time of a crash. We walk the list and try to delete these
1412 * inodes at recovery time (only with a read-write filesystem).
1414 * In order to keep the orphan inode chain consistent during traversal (in
1415 * case of crash during recovery), we link each inode into the superblock
1416 * orphan list_head and handle it the same way as an inode deletion during
1417 * normal operation (which journals the operations for us).
1419 * We only do an iget() and an iput() on each inode, which is very safe if we
1420 * accidentally point at an in-use or already deleted inode. The worst that
1421 * can happen in this case is that we get a "bit already cleared" message from
1422 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1423 * e2fsck was run on this filesystem, and it must have already done the orphan
1424 * inode cleanup for us, so we can safely abort without any further action.
1426 static void ext3_orphan_cleanup (struct super_block * sb,
1427 struct ext3_super_block * es)
1429 unsigned int s_flags = sb->s_flags;
1430 int nr_orphans = 0, nr_truncates = 0;
1434 if (!es->s_last_orphan) {
1435 jbd_debug(4, "no orphan inodes to clean up\n");
1439 if (bdev_read_only(sb->s_bdev)) {
1440 ext3_msg(sb, KERN_ERR, "error: write access "
1441 "unavailable, skipping orphan cleanup.");
1445 if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) {
1446 if (es->s_last_orphan)
1447 jbd_debug(1, "Errors on filesystem, "
1448 "clearing orphan list.\n");
1449 es->s_last_orphan = 0;
1450 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1454 if (s_flags & MS_RDONLY) {
1455 ext3_msg(sb, KERN_INFO, "orphan cleanup on readonly fs");
1456 sb->s_flags &= ~MS_RDONLY;
1459 /* Needed for iput() to work correctly and not trash data */
1460 sb->s_flags |= MS_ACTIVE;
1461 /* Turn on quotas so that they are updated correctly */
1462 for (i = 0; i < MAXQUOTAS; i++) {
1463 if (EXT3_SB(sb)->s_qf_names[i]) {
1464 int ret = ext3_quota_on_mount(sb, i);
1466 ext3_msg(sb, KERN_ERR,
1467 "error: cannot turn on journaled "
1473 while (es->s_last_orphan) {
1474 struct inode *inode;
1476 inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan));
1477 if (IS_ERR(inode)) {
1478 es->s_last_orphan = 0;
1482 list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan);
1484 if (inode->i_nlink) {
1486 "%s: truncating inode %lu to %Ld bytes\n",
1487 __func__, inode->i_ino, inode->i_size);
1488 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1489 inode->i_ino, inode->i_size);
1490 ext3_truncate(inode);
1494 "%s: deleting unreferenced inode %lu\n",
1495 __func__, inode->i_ino);
1496 jbd_debug(2, "deleting unreferenced inode %lu\n",
1500 iput(inode); /* The delete magic happens here! */
1503 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1506 ext3_msg(sb, KERN_INFO, "%d orphan inode%s deleted",
1507 PLURAL(nr_orphans));
1509 ext3_msg(sb, KERN_INFO, "%d truncate%s cleaned up",
1510 PLURAL(nr_truncates));
1512 /* Turn quotas off */
1513 for (i = 0; i < MAXQUOTAS; i++) {
1514 if (sb_dqopt(sb)->files[i])
1515 vfs_quota_off(sb, i, 0);
1518 sb->s_flags = s_flags; /* Restore MS_RDONLY status */
1522 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1523 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1524 * We need to be 1 filesystem block less than the 2^32 sector limit.
1526 static loff_t ext3_max_size(int bits)
1528 loff_t res = EXT3_NDIR_BLOCKS;
1532 /* This is calculated to be the largest file size for a
1533 * dense, file such that the total number of
1534 * sectors in the file, including data and all indirect blocks,
1535 * does not exceed 2^32 -1
1536 * __u32 i_blocks representing the total number of
1537 * 512 bytes blocks of the file
1539 upper_limit = (1LL << 32) - 1;
1541 /* total blocks in file system block size */
1542 upper_limit >>= (bits - 9);
1545 /* indirect blocks */
1547 /* double indirect blocks */
1548 meta_blocks += 1 + (1LL << (bits-2));
1549 /* tripple indirect blocks */
1550 meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
1552 upper_limit -= meta_blocks;
1553 upper_limit <<= bits;
1555 res += 1LL << (bits-2);
1556 res += 1LL << (2*(bits-2));
1557 res += 1LL << (3*(bits-2));
1559 if (res > upper_limit)
1562 if (res > MAX_LFS_FILESIZE)
1563 res = MAX_LFS_FILESIZE;
1568 static ext3_fsblk_t descriptor_loc(struct super_block *sb,
1569 ext3_fsblk_t logic_sb_block,
1572 struct ext3_sb_info *sbi = EXT3_SB(sb);
1573 unsigned long bg, first_meta_bg;
1576 first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
1578 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) ||
1580 return (logic_sb_block + nr + 1);
1581 bg = sbi->s_desc_per_block * nr;
1582 if (ext3_bg_has_super(sb, bg))
1584 return (has_super + ext3_group_first_block_no(sb, bg));
1588 static int ext3_fill_super (struct super_block *sb, void *data, int silent)
1590 struct buffer_head * bh;
1591 struct ext3_super_block *es = NULL;
1592 struct ext3_sb_info *sbi;
1594 ext3_fsblk_t sb_block = get_sb_block(&data, sb);
1595 ext3_fsblk_t logic_sb_block;
1596 unsigned long offset = 0;
1597 unsigned int journal_inum = 0;
1598 unsigned long journal_devnum = 0;
1599 unsigned long def_mount_opts;
1610 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
1614 sbi->s_blockgroup_lock =
1615 kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
1616 if (!sbi->s_blockgroup_lock) {
1620 sb->s_fs_info = sbi;
1621 sbi->s_mount_opt = 0;
1622 sbi->s_resuid = EXT3_DEF_RESUID;
1623 sbi->s_resgid = EXT3_DEF_RESGID;
1624 sbi->s_sb_block = sb_block;
1628 blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE);
1630 ext3_msg(sb, KERN_ERR, "error: unable to set blocksize");
1635 * The ext3 superblock will not be buffer aligned for other than 1kB
1636 * block sizes. We need to calculate the offset from buffer start.
1638 if (blocksize != EXT3_MIN_BLOCK_SIZE) {
1639 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1640 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1642 logic_sb_block = sb_block;
1645 if (!(bh = sb_bread(sb, logic_sb_block))) {
1646 ext3_msg(sb, KERN_ERR, "error: unable to read superblock");
1650 * Note: s_es must be initialized as soon as possible because
1651 * some ext3 macro-instructions depend on its value
1653 es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
1655 sb->s_magic = le16_to_cpu(es->s_magic);
1656 if (sb->s_magic != EXT3_SUPER_MAGIC)
1659 /* Set defaults before we parse the mount options */
1660 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
1661 if (def_mount_opts & EXT3_DEFM_DEBUG)
1662 set_opt(sbi->s_mount_opt, DEBUG);
1663 if (def_mount_opts & EXT3_DEFM_BSDGROUPS)
1664 set_opt(sbi->s_mount_opt, GRPID);
1665 if (def_mount_opts & EXT3_DEFM_UID16)
1666 set_opt(sbi->s_mount_opt, NO_UID32);
1667 #ifdef CONFIG_EXT3_FS_XATTR
1668 if (def_mount_opts & EXT3_DEFM_XATTR_USER)
1669 set_opt(sbi->s_mount_opt, XATTR_USER);
1671 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1672 if (def_mount_opts & EXT3_DEFM_ACL)
1673 set_opt(sbi->s_mount_opt, POSIX_ACL);
1675 if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA)
1676 set_opt(sbi->s_mount_opt, JOURNAL_DATA);
1677 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED)
1678 set_opt(sbi->s_mount_opt, ORDERED_DATA);
1679 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK)
1680 set_opt(sbi->s_mount_opt, WRITEBACK_DATA);
1682 if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC)
1683 set_opt(sbi->s_mount_opt, ERRORS_PANIC);
1684 else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_CONTINUE)
1685 set_opt(sbi->s_mount_opt, ERRORS_CONT);
1687 set_opt(sbi->s_mount_opt, ERRORS_RO);
1689 sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
1690 sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
1692 set_opt(sbi->s_mount_opt, RESERVATION);
1694 if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
1698 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1699 (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0);
1701 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV &&
1702 (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) ||
1703 EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
1704 EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U)))
1705 ext3_msg(sb, KERN_WARNING,
1706 "warning: feature flags set on rev 0 fs, "
1707 "running e2fsck is recommended");
1709 * Check feature flags regardless of the revision level, since we
1710 * previously didn't change the revision level when setting the flags,
1711 * so there is a chance incompat flags are set on a rev 0 filesystem.
1713 features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP);
1715 ext3_msg(sb, KERN_ERR,
1716 "error: couldn't mount because of unsupported "
1717 "optional features (%x)", le32_to_cpu(features));
1720 features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP);
1721 if (!(sb->s_flags & MS_RDONLY) && features) {
1722 ext3_msg(sb, KERN_ERR,
1723 "error: couldn't mount RDWR because of unsupported "
1724 "optional features (%x)", le32_to_cpu(features));
1727 blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
1729 if (blocksize < EXT3_MIN_BLOCK_SIZE ||
1730 blocksize > EXT3_MAX_BLOCK_SIZE) {
1731 ext3_msg(sb, KERN_ERR,
1732 "error: couldn't mount because of unsupported "
1733 "filesystem blocksize %d", blocksize);
1737 hblock = bdev_logical_block_size(sb->s_bdev);
1738 if (sb->s_blocksize != blocksize) {
1740 * Make sure the blocksize for the filesystem is larger
1741 * than the hardware sectorsize for the machine.
1743 if (blocksize < hblock) {
1744 ext3_msg(sb, KERN_ERR,
1745 "error: fsblocksize %d too small for "
1746 "hardware sectorsize %d", blocksize, hblock);
1751 if (!sb_set_blocksize(sb, blocksize)) {
1752 ext3_msg(sb, KERN_ERR,
1753 "error: bad blocksize %d", blocksize);
1756 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1757 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1758 bh = sb_bread(sb, logic_sb_block);
1760 ext3_msg(sb, KERN_ERR,
1761 "error: can't read superblock on 2nd try");
1764 es = (struct ext3_super_block *)(((char *)bh->b_data) + offset);
1766 if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) {
1767 ext3_msg(sb, KERN_ERR,
1768 "error: magic mismatch");
1773 sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits);
1775 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) {
1776 sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE;
1777 sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO;
1779 sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
1780 sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
1781 if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) ||
1782 (!is_power_of_2(sbi->s_inode_size)) ||
1783 (sbi->s_inode_size > blocksize)) {
1784 ext3_msg(sb, KERN_ERR,
1785 "error: unsupported inode size: %d",
1790 sbi->s_frag_size = EXT3_MIN_FRAG_SIZE <<
1791 le32_to_cpu(es->s_log_frag_size);
1792 if (blocksize != sbi->s_frag_size) {
1793 ext3_msg(sb, KERN_ERR,
1794 "error: fragsize %lu != blocksize %u (unsupported)",
1795 sbi->s_frag_size, blocksize);
1798 sbi->s_frags_per_block = 1;
1799 sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
1800 sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
1801 sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
1802 if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0)
1804 sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb);
1805 if (sbi->s_inodes_per_block == 0)
1807 sbi->s_itb_per_group = sbi->s_inodes_per_group /
1808 sbi->s_inodes_per_block;
1809 sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc);
1811 sbi->s_mount_state = le16_to_cpu(es->s_state);
1812 sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb));
1813 sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb));
1814 for (i=0; i < 4; i++)
1815 sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
1816 sbi->s_def_hash_version = es->s_def_hash_version;
1817 i = le32_to_cpu(es->s_flags);
1818 if (i & EXT2_FLAGS_UNSIGNED_HASH)
1819 sbi->s_hash_unsigned = 3;
1820 else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) {
1821 #ifdef __CHAR_UNSIGNED__
1822 es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH);
1823 sbi->s_hash_unsigned = 3;
1825 es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH);
1829 if (sbi->s_blocks_per_group > blocksize * 8) {
1830 ext3_msg(sb, KERN_ERR,
1831 "#blocks per group too big: %lu",
1832 sbi->s_blocks_per_group);
1835 if (sbi->s_frags_per_group > blocksize * 8) {
1836 ext3_msg(sb, KERN_ERR,
1837 "error: #fragments per group too big: %lu",
1838 sbi->s_frags_per_group);
1841 if (sbi->s_inodes_per_group > blocksize * 8) {
1842 ext3_msg(sb, KERN_ERR,
1843 "error: #inodes per group too big: %lu",
1844 sbi->s_inodes_per_group);
1848 if (le32_to_cpu(es->s_blocks_count) >
1849 (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) {
1850 ext3_msg(sb, KERN_ERR,
1851 "error: filesystem is too large to mount safely");
1852 if (sizeof(sector_t) < 8)
1853 ext3_msg(sb, KERN_ERR,
1854 "error: CONFIG_LBDAF not enabled");
1858 if (EXT3_BLOCKS_PER_GROUP(sb) == 0)
1860 sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
1861 le32_to_cpu(es->s_first_data_block) - 1)
1862 / EXT3_BLOCKS_PER_GROUP(sb)) + 1;
1863 db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) /
1864 EXT3_DESC_PER_BLOCK(sb);
1865 sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
1867 if (sbi->s_group_desc == NULL) {
1868 ext3_msg(sb, KERN_ERR,
1869 "error: not enough memory");
1873 bgl_lock_init(sbi->s_blockgroup_lock);
1875 for (i = 0; i < db_count; i++) {
1876 block = descriptor_loc(sb, logic_sb_block, i);
1877 sbi->s_group_desc[i] = sb_bread(sb, block);
1878 if (!sbi->s_group_desc[i]) {
1879 ext3_msg(sb, KERN_ERR,
1880 "error: can't read group descriptor %d", i);
1885 if (!ext3_check_descriptors (sb)) {
1886 ext3_msg(sb, KERN_ERR,
1887 "error: group descriptors corrupted");
1890 sbi->s_gdb_count = db_count;
1891 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1892 spin_lock_init(&sbi->s_next_gen_lock);
1894 err = percpu_counter_init(&sbi->s_freeblocks_counter,
1895 ext3_count_free_blocks(sb));
1897 err = percpu_counter_init(&sbi->s_freeinodes_counter,
1898 ext3_count_free_inodes(sb));
1901 err = percpu_counter_init(&sbi->s_dirs_counter,
1902 ext3_count_dirs(sb));
1905 ext3_msg(sb, KERN_ERR, "error: insufficient memory");
1909 /* per fileystem reservation list head & lock */
1910 spin_lock_init(&sbi->s_rsv_window_lock);
1911 sbi->s_rsv_window_root = RB_ROOT;
1912 /* Add a single, static dummy reservation to the start of the
1913 * reservation window list --- it gives us a placeholder for
1914 * append-at-start-of-list which makes the allocation logic
1915 * _much_ simpler. */
1916 sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1917 sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1918 sbi->s_rsv_window_head.rsv_alloc_hit = 0;
1919 sbi->s_rsv_window_head.rsv_goal_size = 0;
1920 ext3_rsv_window_add(sb, &sbi->s_rsv_window_head);
1923 * set up enough so that it can read an inode
1925 sb->s_op = &ext3_sops;
1926 sb->s_export_op = &ext3_export_ops;
1927 sb->s_xattr = ext3_xattr_handlers;
1929 sb->s_qcop = &ext3_qctl_operations;
1930 sb->dq_op = &ext3_quota_operations;
1932 INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
1933 mutex_init(&sbi->s_orphan_lock);
1934 mutex_init(&sbi->s_resize_lock);
1938 needs_recovery = (es->s_last_orphan != 0 ||
1939 EXT3_HAS_INCOMPAT_FEATURE(sb,
1940 EXT3_FEATURE_INCOMPAT_RECOVER));
1943 * The first inode we look at is the journal inode. Don't try
1944 * root first: it may be modified in the journal!
1946 if (!test_opt(sb, NOLOAD) &&
1947 EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1948 if (ext3_load_journal(sb, es, journal_devnum))
1950 } else if (journal_inum) {
1951 if (ext3_create_journal(sb, es, journal_inum))
1955 ext3_msg(sb, KERN_ERR,
1956 "error: no journal found. "
1957 "mounting ext3 over ext2?");
1961 /* We have now updated the journal if required, so we can
1962 * validate the data journaling mode. */
1963 switch (test_opt(sb, DATA_FLAGS)) {
1965 /* No mode set, assume a default based on the journal
1966 capabilities: ORDERED_DATA if the journal can
1967 cope, else JOURNAL_DATA */
1968 if (journal_check_available_features
1969 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE))
1970 set_opt(sbi->s_mount_opt, DEFAULT_DATA_MODE);
1972 set_opt(sbi->s_mount_opt, JOURNAL_DATA);
1975 case EXT3_MOUNT_ORDERED_DATA:
1976 case EXT3_MOUNT_WRITEBACK_DATA:
1977 if (!journal_check_available_features
1978 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) {
1979 ext3_msg(sb, KERN_ERR,
1980 "error: journal does not support "
1981 "requested data journaling mode");
1988 if (test_opt(sb, NOBH)) {
1989 if (!(test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)) {
1990 ext3_msg(sb, KERN_WARNING,
1991 "warning: ignoring nobh option - "
1992 "it is supported only with writeback mode");
1993 clear_opt(sbi->s_mount_opt, NOBH);
1997 * The journal_load will have done any necessary log recovery,
1998 * so we can safely mount the rest of the filesystem now.
2001 root = ext3_iget(sb, EXT3_ROOT_INO);
2003 ext3_msg(sb, KERN_ERR, "error: get root inode failed");
2004 ret = PTR_ERR(root);
2007 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
2009 ext3_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck");
2012 sb->s_root = d_alloc_root(root);
2014 ext3_msg(sb, KERN_ERR, "error: get root dentry failed");
2020 ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
2022 EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS;
2023 ext3_orphan_cleanup(sb, es);
2024 EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS;
2026 ext3_msg(sb, KERN_INFO, "recovery complete");
2027 ext3_mark_recovery_complete(sb, es);
2028 ext3_msg(sb, KERN_INFO, "mounted filesystem with %s data mode",
2029 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal":
2030 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered":
2038 ext3_msg(sb, KERN_INFO,
2039 "error: can't find ext3 filesystem on dev %s.",
2044 journal_destroy(sbi->s_journal);
2046 percpu_counter_destroy(&sbi->s_freeblocks_counter);
2047 percpu_counter_destroy(&sbi->s_freeinodes_counter);
2048 percpu_counter_destroy(&sbi->s_dirs_counter);
2050 for (i = 0; i < db_count; i++)
2051 brelse(sbi->s_group_desc[i]);
2052 kfree(sbi->s_group_desc);
2055 for (i = 0; i < MAXQUOTAS; i++)
2056 kfree(sbi->s_qf_names[i]);
2058 ext3_blkdev_remove(sbi);
2061 sb->s_fs_info = NULL;
2062 kfree(sbi->s_blockgroup_lock);
2069 * Setup any per-fs journal parameters now. We'll do this both on
2070 * initial mount, once the journal has been initialised but before we've
2071 * done any recovery; and again on any subsequent remount.
2073 static void ext3_init_journal_params(struct super_block *sb, journal_t *journal)
2075 struct ext3_sb_info *sbi = EXT3_SB(sb);
2077 if (sbi->s_commit_interval)
2078 journal->j_commit_interval = sbi->s_commit_interval;
2079 /* We could also set up an ext3-specific default for the commit
2080 * interval here, but for now we'll just fall back to the jbd
2083 spin_lock(&journal->j_state_lock);
2084 if (test_opt(sb, BARRIER))
2085 journal->j_flags |= JFS_BARRIER;
2087 journal->j_flags &= ~JFS_BARRIER;
2088 if (test_opt(sb, DATA_ERR_ABORT))
2089 journal->j_flags |= JFS_ABORT_ON_SYNCDATA_ERR;
2091 journal->j_flags &= ~JFS_ABORT_ON_SYNCDATA_ERR;
2092 spin_unlock(&journal->j_state_lock);
2095 static journal_t *ext3_get_journal(struct super_block *sb,
2096 unsigned int journal_inum)
2098 struct inode *journal_inode;
2101 /* First, test for the existence of a valid inode on disk. Bad
2102 * things happen if we iget() an unused inode, as the subsequent
2103 * iput() will try to delete it. */
2105 journal_inode = ext3_iget(sb, journal_inum);
2106 if (IS_ERR(journal_inode)) {
2107 ext3_msg(sb, KERN_ERR, "error: no journal found");
2110 if (!journal_inode->i_nlink) {
2111 make_bad_inode(journal_inode);
2112 iput(journal_inode);
2113 ext3_msg(sb, KERN_ERR, "error: journal inode is deleted");
2117 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2118 journal_inode, journal_inode->i_size);
2119 if (!S_ISREG(journal_inode->i_mode)) {
2120 ext3_msg(sb, KERN_ERR, "error: invalid journal inode");
2121 iput(journal_inode);
2125 journal = journal_init_inode(journal_inode);
2127 ext3_msg(sb, KERN_ERR, "error: could not load journal inode");
2128 iput(journal_inode);
2131 journal->j_private = sb;
2132 ext3_init_journal_params(sb, journal);
2136 static journal_t *ext3_get_dev_journal(struct super_block *sb,
2139 struct buffer_head * bh;
2143 int hblock, blocksize;
2144 ext3_fsblk_t sb_block;
2145 unsigned long offset;
2146 struct ext3_super_block * es;
2147 struct block_device *bdev;
2149 bdev = ext3_blkdev_get(j_dev, sb);
2153 if (bd_claim(bdev, sb)) {
2154 ext3_msg(sb, KERN_ERR,
2155 "error: failed to claim external journal device");
2156 blkdev_put(bdev, FMODE_READ|FMODE_WRITE);
2160 blocksize = sb->s_blocksize;
2161 hblock = bdev_logical_block_size(bdev);
2162 if (blocksize < hblock) {
2163 ext3_msg(sb, KERN_ERR,
2164 "error: blocksize too small for journal device");
2168 sb_block = EXT3_MIN_BLOCK_SIZE / blocksize;
2169 offset = EXT3_MIN_BLOCK_SIZE % blocksize;
2170 set_blocksize(bdev, blocksize);
2171 if (!(bh = __bread(bdev, sb_block, blocksize))) {
2172 ext3_msg(sb, KERN_ERR, "error: couldn't read superblock of "
2173 "external journal");
2177 es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
2178 if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) ||
2179 !(le32_to_cpu(es->s_feature_incompat) &
2180 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
2181 ext3_msg(sb, KERN_ERR, "error: external journal has "
2187 if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
2188 ext3_msg(sb, KERN_ERR, "error: journal UUID does not match");
2193 len = le32_to_cpu(es->s_blocks_count);
2194 start = sb_block + 1;
2195 brelse(bh); /* we're done with the superblock */
2197 journal = journal_init_dev(bdev, sb->s_bdev,
2198 start, len, blocksize);
2200 ext3_msg(sb, KERN_ERR,
2201 "error: failed to create device journal");
2204 journal->j_private = sb;
2205 ll_rw_block(READ, 1, &journal->j_sb_buffer);
2206 wait_on_buffer(journal->j_sb_buffer);
2207 if (!buffer_uptodate(journal->j_sb_buffer)) {
2208 ext3_msg(sb, KERN_ERR, "I/O error on journal device");
2211 if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {
2212 ext3_msg(sb, KERN_ERR,
2213 "error: external journal has more than one "
2214 "user (unsupported) - %d",
2215 be32_to_cpu(journal->j_superblock->s_nr_users));
2218 EXT3_SB(sb)->journal_bdev = bdev;
2219 ext3_init_journal_params(sb, journal);
2222 journal_destroy(journal);
2224 ext3_blkdev_put(bdev);
2228 static int ext3_load_journal(struct super_block *sb,
2229 struct ext3_super_block *es,
2230 unsigned long journal_devnum)
2233 unsigned int journal_inum = le32_to_cpu(es->s_journal_inum);
2236 int really_read_only;
2238 if (journal_devnum &&
2239 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2240 ext3_msg(sb, KERN_INFO, "external journal device major/minor "
2241 "numbers have changed");
2242 journal_dev = new_decode_dev(journal_devnum);
2244 journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));
2246 really_read_only = bdev_read_only(sb->s_bdev);
2249 * Are we loading a blank journal or performing recovery after a
2250 * crash? For recovery, we need to check in advance whether we
2251 * can get read-write access to the device.
2254 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) {
2255 if (sb->s_flags & MS_RDONLY) {
2256 ext3_msg(sb, KERN_INFO,
2257 "recovery required on readonly filesystem");
2258 if (really_read_only) {
2259 ext3_msg(sb, KERN_ERR, "error: write access "
2260 "unavailable, cannot proceed");
2263 ext3_msg(sb, KERN_INFO,
2264 "write access will be enabled during recovery");
2268 if (journal_inum && journal_dev) {
2269 ext3_msg(sb, KERN_ERR, "error: filesystem has both journal "
2270 "and inode journals");
2275 if (!(journal = ext3_get_journal(sb, journal_inum)))
2278 if (!(journal = ext3_get_dev_journal(sb, journal_dev)))
2282 if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) {
2283 err = journal_update_format(journal);
2285 ext3_msg(sb, KERN_ERR, "error updating journal");
2286 journal_destroy(journal);
2291 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER))
2292 err = journal_wipe(journal, !really_read_only);
2294 err = journal_load(journal);
2297 ext3_msg(sb, KERN_ERR, "error loading journal");
2298 journal_destroy(journal);
2302 EXT3_SB(sb)->s_journal = journal;
2303 ext3_clear_journal_err(sb, es);
2305 if (journal_devnum &&
2306 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2307 es->s_journal_dev = cpu_to_le32(journal_devnum);
2309 /* Make sure we flush the recovery flag to disk. */
2310 ext3_commit_super(sb, es, 1);
2316 static int ext3_create_journal(struct super_block *sb,
2317 struct ext3_super_block *es,
2318 unsigned int journal_inum)
2323 if (sb->s_flags & MS_RDONLY) {
2324 ext3_msg(sb, KERN_ERR,
2325 "error: readonly filesystem when trying to "
2330 journal = ext3_get_journal(sb, journal_inum);
2334 ext3_msg(sb, KERN_INFO, "creating new journal on inode %u",
2337 err = journal_create(journal);
2339 ext3_msg(sb, KERN_ERR, "error creating journal");
2340 journal_destroy(journal);
2344 EXT3_SB(sb)->s_journal = journal;
2346 ext3_update_dynamic_rev(sb);
2347 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2348 EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL);
2350 es->s_journal_inum = cpu_to_le32(journal_inum);
2352 /* Make sure we flush the recovery flag to disk. */
2353 ext3_commit_super(sb, es, 1);
2358 static int ext3_commit_super(struct super_block *sb,
2359 struct ext3_super_block *es,
2362 struct buffer_head *sbh = EXT3_SB(sb)->s_sbh;
2368 * If the file system is mounted read-only, don't update the
2369 * superblock write time. This avoids updating the superblock
2370 * write time when we are mounting the root file system
2371 * read/only but we need to replay the journal; at that point,
2372 * for people who are east of GMT and who make their clock
2373 * tick in localtime for Windows bug-for-bug compatibility,
2374 * the clock is set in the future, and this will cause e2fsck
2375 * to complain and force a full file system check.
2377 if (!(sb->s_flags & MS_RDONLY))
2378 es->s_wtime = cpu_to_le32(get_seconds());
2379 es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb));
2380 es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb));
2381 BUFFER_TRACE(sbh, "marking dirty");
2382 mark_buffer_dirty(sbh);
2384 error = sync_dirty_buffer(sbh);
2390 * Have we just finished recovery? If so, and if we are mounting (or
2391 * remounting) the filesystem readonly, then we will end up with a
2392 * consistent fs on disk. Record that fact.
2394 static void ext3_mark_recovery_complete(struct super_block * sb,
2395 struct ext3_super_block * es)
2397 journal_t *journal = EXT3_SB(sb)->s_journal;
2399 journal_lock_updates(journal);
2400 if (journal_flush(journal) < 0)
2403 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) &&
2404 sb->s_flags & MS_RDONLY) {
2405 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2406 ext3_commit_super(sb, es, 1);
2410 journal_unlock_updates(journal);
2414 * If we are mounting (or read-write remounting) a filesystem whose journal
2415 * has recorded an error from a previous lifetime, move that error to the
2416 * main filesystem now.
2418 static void ext3_clear_journal_err(struct super_block *sb,
2419 struct ext3_super_block *es)
2425 journal = EXT3_SB(sb)->s_journal;
2428 * Now check for any error status which may have been recorded in the
2429 * journal by a prior ext3_error() or ext3_abort()
2432 j_errno = journal_errno(journal);
2436 errstr = ext3_decode_error(sb, j_errno, nbuf);
2437 ext3_warning(sb, __func__, "Filesystem error recorded "
2438 "from previous mount: %s", errstr);
2439 ext3_warning(sb, __func__, "Marking fs in need of "
2440 "filesystem check.");
2442 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
2443 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
2444 ext3_commit_super (sb, es, 1);
2446 journal_clear_err(journal);
2451 * Force the running and committing transactions to commit,
2452 * and wait on the commit.
2454 int ext3_force_commit(struct super_block *sb)
2459 if (sb->s_flags & MS_RDONLY)
2462 journal = EXT3_SB(sb)->s_journal;
2463 ret = ext3_journal_force_commit(journal);
2467 static int ext3_sync_fs(struct super_block *sb, int wait)
2471 if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) {
2473 log_wait_commit(EXT3_SB(sb)->s_journal, target);
2479 * LVM calls this function before a (read-only) snapshot is created. This
2480 * gives us a chance to flush the journal completely and mark the fs clean.
2482 static int ext3_freeze(struct super_block *sb)
2487 if (!(sb->s_flags & MS_RDONLY)) {
2488 journal = EXT3_SB(sb)->s_journal;
2490 /* Now we set up the journal barrier. */
2491 journal_lock_updates(journal);
2494 * We don't want to clear needs_recovery flag when we failed
2495 * to flush the journal.
2497 error = journal_flush(journal);
2501 /* Journal blocked and flushed, clear needs_recovery flag. */
2502 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2503 error = ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2510 journal_unlock_updates(journal);
2515 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2516 * flag here, even though the filesystem is not technically dirty yet.
2518 static int ext3_unfreeze(struct super_block *sb)
2520 if (!(sb->s_flags & MS_RDONLY)) {
2522 /* Reser the needs_recovery flag before the fs is unlocked. */
2523 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2524 ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2526 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2531 static int ext3_remount (struct super_block * sb, int * flags, char * data)
2533 struct ext3_super_block * es;
2534 struct ext3_sb_info *sbi = EXT3_SB(sb);
2535 ext3_fsblk_t n_blocks_count = 0;
2536 unsigned long old_sb_flags;
2537 struct ext3_mount_options old_opts;
2545 /* Store the original options */
2547 old_sb_flags = sb->s_flags;
2548 old_opts.s_mount_opt = sbi->s_mount_opt;
2549 old_opts.s_resuid = sbi->s_resuid;
2550 old_opts.s_resgid = sbi->s_resgid;
2551 old_opts.s_commit_interval = sbi->s_commit_interval;
2553 old_opts.s_jquota_fmt = sbi->s_jquota_fmt;
2554 for (i = 0; i < MAXQUOTAS; i++)
2555 old_opts.s_qf_names[i] = sbi->s_qf_names[i];
2559 * Allow the "check" option to be passed as a remount option.
2561 if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) {
2566 if (test_opt(sb, ABORT))
2567 ext3_abort(sb, __func__, "Abort forced by user");
2569 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
2570 (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0);
2574 ext3_init_journal_params(sb, sbi->s_journal);
2576 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) ||
2577 n_blocks_count > le32_to_cpu(es->s_blocks_count)) {
2578 if (test_opt(sb, ABORT)) {
2583 if (*flags & MS_RDONLY) {
2585 * First of all, the unconditional stuff we have to do
2586 * to disable replay of the journal when we next remount
2588 sb->s_flags |= MS_RDONLY;
2591 * OK, test if we are remounting a valid rw partition
2592 * readonly, and if so set the rdonly flag and then
2593 * mark the partition as valid again.
2595 if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) &&
2596 (sbi->s_mount_state & EXT3_VALID_FS))
2597 es->s_state = cpu_to_le16(sbi->s_mount_state);
2599 ext3_mark_recovery_complete(sb, es);
2602 if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb,
2603 ~EXT3_FEATURE_RO_COMPAT_SUPP))) {
2604 ext3_msg(sb, KERN_WARNING,
2605 "warning: couldn't remount RDWR "
2606 "because of unsupported optional "
2607 "features (%x)", le32_to_cpu(ret));
2613 * If we have an unprocessed orphan list hanging
2614 * around from a previously readonly bdev mount,
2615 * require a full umount/remount for now.
2617 if (es->s_last_orphan) {
2618 ext3_msg(sb, KERN_WARNING, "warning: couldn't "
2619 "remount RDWR because of unprocessed "
2620 "orphan inode list. Please "
2621 "umount/remount instead.");
2627 * Mounting a RDONLY partition read-write, so reread
2628 * and store the current valid flag. (It may have
2629 * been changed by e2fsck since we originally mounted
2632 ext3_clear_journal_err(sb, es);
2633 sbi->s_mount_state = le16_to_cpu(es->s_state);
2634 if ((err = ext3_group_extend(sb, es, n_blocks_count)))
2636 if (!ext3_setup_super (sb, es, 0))
2637 sb->s_flags &= ~MS_RDONLY;
2641 /* Release old quota file names */
2642 for (i = 0; i < MAXQUOTAS; i++)
2643 if (old_opts.s_qf_names[i] &&
2644 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2645 kfree(old_opts.s_qf_names[i]);
2651 sb->s_flags = old_sb_flags;
2652 sbi->s_mount_opt = old_opts.s_mount_opt;
2653 sbi->s_resuid = old_opts.s_resuid;
2654 sbi->s_resgid = old_opts.s_resgid;
2655 sbi->s_commit_interval = old_opts.s_commit_interval;
2657 sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
2658 for (i = 0; i < MAXQUOTAS; i++) {
2659 if (sbi->s_qf_names[i] &&
2660 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2661 kfree(sbi->s_qf_names[i]);
2662 sbi->s_qf_names[i] = old_opts.s_qf_names[i];
2670 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
2672 struct super_block *sb = dentry->d_sb;
2673 struct ext3_sb_info *sbi = EXT3_SB(sb);
2674 struct ext3_super_block *es = sbi->s_es;
2677 if (test_opt(sb, MINIX_DF)) {
2678 sbi->s_overhead_last = 0;
2679 } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
2680 unsigned long ngroups = sbi->s_groups_count, i;
2681 ext3_fsblk_t overhead = 0;
2685 * Compute the overhead (FS structures). This is constant
2686 * for a given filesystem unless the number of block groups
2687 * changes so we cache the previous value until it does.
2691 * All of the blocks before first_data_block are
2694 overhead = le32_to_cpu(es->s_first_data_block);
2697 * Add the overhead attributed to the superblock and
2698 * block group descriptors. If the sparse superblocks
2699 * feature is turned on, then not all groups have this.
2701 for (i = 0; i < ngroups; i++) {
2702 overhead += ext3_bg_has_super(sb, i) +
2703 ext3_bg_num_gdb(sb, i);
2708 * Every block group has an inode bitmap, a block
2709 * bitmap, and an inode table.
2711 overhead += ngroups * (2 + sbi->s_itb_per_group);
2712 sbi->s_overhead_last = overhead;
2714 sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
2717 buf->f_type = EXT3_SUPER_MAGIC;
2718 buf->f_bsize = sb->s_blocksize;
2719 buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last;
2720 buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter);
2721 buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
2722 if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
2724 buf->f_files = le32_to_cpu(es->s_inodes_count);
2725 buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);
2726 buf->f_namelen = EXT3_NAME_LEN;
2727 fsid = le64_to_cpup((void *)es->s_uuid) ^
2728 le64_to_cpup((void *)es->s_uuid + sizeof(u64));
2729 buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
2730 buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
2734 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2735 * is locked for write. Otherwise the are possible deadlocks:
2736 * Process 1 Process 2
2737 * ext3_create() quota_sync()
2738 * journal_start() write_dquot()
2739 * vfs_dq_init() down(dqio_mutex)
2740 * down(dqio_mutex) journal_start()
2746 static inline struct inode *dquot_to_inode(struct dquot *dquot)
2748 return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
2751 static int ext3_write_dquot(struct dquot *dquot)
2755 struct inode *inode;
2757 inode = dquot_to_inode(dquot);
2758 handle = ext3_journal_start(inode,
2759 EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2761 return PTR_ERR(handle);
2762 ret = dquot_commit(dquot);
2763 err = ext3_journal_stop(handle);
2769 static int ext3_acquire_dquot(struct dquot *dquot)
2774 handle = ext3_journal_start(dquot_to_inode(dquot),
2775 EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2777 return PTR_ERR(handle);
2778 ret = dquot_acquire(dquot);
2779 err = ext3_journal_stop(handle);
2785 static int ext3_release_dquot(struct dquot *dquot)
2790 handle = ext3_journal_start(dquot_to_inode(dquot),
2791 EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2792 if (IS_ERR(handle)) {
2793 /* Release dquot anyway to avoid endless cycle in dqput() */
2794 dquot_release(dquot);
2795 return PTR_ERR(handle);
2797 ret = dquot_release(dquot);
2798 err = ext3_journal_stop(handle);
2804 static int ext3_mark_dquot_dirty(struct dquot *dquot)
2806 /* Are we journaling quotas? */
2807 if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2808 EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2809 dquot_mark_dquot_dirty(dquot);
2810 return ext3_write_dquot(dquot);
2812 return dquot_mark_dquot_dirty(dquot);
2816 static int ext3_write_info(struct super_block *sb, int type)
2821 /* Data block + inode block */
2822 handle = ext3_journal_start(sb->s_root->d_inode, 2);
2824 return PTR_ERR(handle);
2825 ret = dquot_commit_info(sb, type);
2826 err = ext3_journal_stop(handle);
2833 * Turn on quotas during mount time - we need to find
2834 * the quota file and such...
2836 static int ext3_quota_on_mount(struct super_block *sb, int type)
2838 return vfs_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type],
2839 EXT3_SB(sb)->s_jquota_fmt, type);
2843 * Standard function to be called on quota_on
2845 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
2846 char *name, int remount)
2851 if (!test_opt(sb, QUOTA))
2853 /* When remounting, no checks are needed and in fact, name is NULL */
2855 return vfs_quota_on(sb, type, format_id, name, remount);
2857 err = kern_path(name, LOOKUP_FOLLOW, &path);
2861 /* Quotafile not on the same filesystem? */
2862 if (path.mnt->mnt_sb != sb) {
2866 /* Journaling quota? */
2867 if (EXT3_SB(sb)->s_qf_names[type]) {
2868 /* Quotafile not of fs root? */
2869 if (path.dentry->d_parent != sb->s_root)
2870 ext3_msg(sb, KERN_WARNING,
2871 "warning: Quota file not on filesystem root. "
2872 "Journaled quota will not work.");
2876 * When we journal data on quota file, we have to flush journal to see
2877 * all updates to the file when we bypass pagecache...
2879 if (ext3_should_journal_data(path.dentry->d_inode)) {
2881 * We don't need to lock updates but journal_flush() could
2882 * otherwise be livelocked...
2884 journal_lock_updates(EXT3_SB(sb)->s_journal);
2885 err = journal_flush(EXT3_SB(sb)->s_journal);
2886 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2893 err = vfs_quota_on_path(sb, type, format_id, &path);
2898 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2899 * acquiring the locks... As quota files are never truncated and quota code
2900 * itself serializes the operations (and noone else should touch the files)
2901 * we don't have to be afraid of races */
2902 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
2903 size_t len, loff_t off)
2905 struct inode *inode = sb_dqopt(sb)->files[type];
2906 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2908 int offset = off & (sb->s_blocksize - 1);
2911 struct buffer_head *bh;
2912 loff_t i_size = i_size_read(inode);
2916 if (off+len > i_size)
2919 while (toread > 0) {
2920 tocopy = sb->s_blocksize - offset < toread ?
2921 sb->s_blocksize - offset : toread;
2922 bh = ext3_bread(NULL, inode, blk, 0, &err);
2925 if (!bh) /* A hole? */
2926 memset(data, 0, tocopy);
2928 memcpy(data, bh->b_data+offset, tocopy);
2938 /* Write to quotafile (we know the transaction is already started and has
2939 * enough credits) */
2940 static ssize_t ext3_quota_write(struct super_block *sb, int type,
2941 const char *data, size_t len, loff_t off)
2943 struct inode *inode = sb_dqopt(sb)->files[type];
2944 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2946 int offset = off & (sb->s_blocksize - 1);
2947 int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL;
2948 struct buffer_head *bh;
2949 handle_t *handle = journal_current_handle();
2952 ext3_msg(sb, KERN_WARNING,
2953 "warning: quota write (off=%llu, len=%llu)"
2954 " cancelled because transaction is not started.",
2955 (unsigned long long)off, (unsigned long long)len);
2960 * Since we account only one data block in transaction credits,
2961 * then it is impossible to cross a block boundary.
2963 if (sb->s_blocksize - offset < len) {
2964 ext3_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)"
2965 " cancelled because not block aligned",
2966 (unsigned long long)off, (unsigned long long)len);
2969 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2970 bh = ext3_bread(handle, inode, blk, 1, &err);
2973 if (journal_quota) {
2974 err = ext3_journal_get_write_access(handle, bh);
2981 memcpy(bh->b_data+offset, data, len);
2982 flush_dcache_page(bh->b_page);
2985 err = ext3_journal_dirty_metadata(handle, bh);
2987 /* Always do at least ordered writes for quotas */
2988 err = ext3_journal_dirty_data(handle, bh);
2989 mark_buffer_dirty(bh);
2994 mutex_unlock(&inode->i_mutex);
2997 if (inode->i_size < off + len) {
2998 i_size_write(inode, off + len);
2999 EXT3_I(inode)->i_disksize = inode->i_size;
3002 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
3003 ext3_mark_inode_dirty(handle, inode);
3004 mutex_unlock(&inode->i_mutex);
3010 static int ext3_get_sb(struct file_system_type *fs_type,
3011 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
3013 return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super, mnt);
3016 static struct file_system_type ext3_fs_type = {
3017 .owner = THIS_MODULE,
3019 .get_sb = ext3_get_sb,
3020 .kill_sb = kill_block_super,
3021 .fs_flags = FS_REQUIRES_DEV,
3024 static int __init init_ext3_fs(void)
3026 int err = init_ext3_xattr();
3029 err = init_inodecache();
3032 err = register_filesystem(&ext3_fs_type);
3037 destroy_inodecache();
3043 static void __exit exit_ext3_fs(void)
3045 unregister_filesystem(&ext3_fs_type);
3046 destroy_inodecache();
3050 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3051 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3052 MODULE_LICENSE("GPL");
3053 module_init(init_ext3_fs)
3054 module_exit(exit_ext3_fs)