2 * linux/fs/ext3/super.c
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
11 * linux/fs/minix/inode.c
13 * Copyright (C) 1991, 1992 Linus Torvalds
15 * Big-endian to little-endian byte-swapping/bitmaps by
16 * David S. Miller (davem@caip.rutgers.edu), 1995
19 #include <linux/module.h>
20 #include <linux/string.h>
22 #include <linux/time.h>
23 #include <linux/jbd.h>
24 #include <linux/ext3_fs.h>
25 #include <linux/ext3_jbd.h>
26 #include <linux/slab.h>
27 #include <linux/init.h>
28 #include <linux/blkdev.h>
29 #include <linux/parser.h>
30 #include <linux/smp_lock.h>
31 #include <linux/buffer_head.h>
32 #include <linux/exportfs.h>
33 #include <linux/vfs.h>
34 #include <linux/random.h>
35 #include <linux/mount.h>
36 #include <linux/namei.h>
37 #include <linux/quotaops.h>
38 #include <linux/seq_file.h>
39 #include <linux/log2.h>
41 #include <asm/uaccess.h>
47 #ifdef CONFIG_EXT3_DEFAULTS_TO_ORDERED
48 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_ORDERED_DATA
50 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_WRITEBACK_DATA
53 static int ext3_load_journal(struct super_block *, struct ext3_super_block *,
54 unsigned long journal_devnum);
55 static int ext3_create_journal(struct super_block *, struct ext3_super_block *,
57 static int ext3_commit_super(struct super_block *sb,
58 struct ext3_super_block *es,
60 static void ext3_mark_recovery_complete(struct super_block * sb,
61 struct ext3_super_block * es);
62 static void ext3_clear_journal_err(struct super_block * sb,
63 struct ext3_super_block * es);
64 static int ext3_sync_fs(struct super_block *sb, int wait);
65 static const char *ext3_decode_error(struct super_block * sb, int errno,
67 static int ext3_remount (struct super_block * sb, int * flags, char * data);
68 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf);
69 static int ext3_unfreeze(struct super_block *sb);
70 static int ext3_freeze(struct super_block *sb);
73 * Wrappers for journal_start/end.
75 * The only special thing we need to do here is to make sure that all
76 * journal_end calls result in the superblock being marked dirty, so
77 * that sync() will call the filesystem's write_super callback if
80 handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
84 if (sb->s_flags & MS_RDONLY)
85 return ERR_PTR(-EROFS);
87 /* Special case here: if the journal has aborted behind our
88 * backs (eg. EIO in the commit thread), then we still need to
89 * take the FS itself readonly cleanly. */
90 journal = EXT3_SB(sb)->s_journal;
91 if (is_journal_aborted(journal)) {
92 ext3_abort(sb, __func__,
93 "Detected aborted journal");
94 return ERR_PTR(-EROFS);
97 return journal_start(journal, nblocks);
101 * The only special thing we need to do here is to make sure that all
102 * journal_stop calls result in the superblock being marked dirty, so
103 * that sync() will call the filesystem's write_super callback if
106 int __ext3_journal_stop(const char *where, handle_t *handle)
108 struct super_block *sb;
112 sb = handle->h_transaction->t_journal->j_private;
114 rc = journal_stop(handle);
119 __ext3_std_error(sb, where, err);
123 void ext3_journal_abort_handle(const char *caller, const char *err_fn,
124 struct buffer_head *bh, handle_t *handle, int err)
127 const char *errstr = ext3_decode_error(NULL, err, nbuf);
130 BUFFER_TRACE(bh, "abort");
135 if (is_handle_aborted(handle))
138 printk(KERN_ERR "%s: aborting transaction: %s in %s\n",
139 caller, errstr, err_fn);
141 journal_abort_handle(handle);
144 /* Deal with the reporting of failure conditions on a filesystem such as
145 * inconsistencies detected or read IO failures.
147 * On ext2, we can store the error state of the filesystem in the
148 * superblock. That is not possible on ext3, because we may have other
149 * write ordering constraints on the superblock which prevent us from
150 * writing it out straight away; and given that the journal is about to
151 * be aborted, we can't rely on the current, or future, transactions to
152 * write out the superblock safely.
154 * We'll just use the journal_abort() error code to record an error in
155 * the journal instead. On recovery, the journal will compain about
156 * that error until we've noted it down and cleared it.
159 static void ext3_handle_error(struct super_block *sb)
161 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
163 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
164 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
166 if (sb->s_flags & MS_RDONLY)
169 if (!test_opt (sb, ERRORS_CONT)) {
170 journal_t *journal = EXT3_SB(sb)->s_journal;
172 EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
174 journal_abort(journal, -EIO);
176 if (test_opt (sb, ERRORS_RO)) {
177 printk (KERN_CRIT "Remounting filesystem read-only\n");
178 sb->s_flags |= MS_RDONLY;
180 ext3_commit_super(sb, es, 1);
181 if (test_opt(sb, ERRORS_PANIC))
182 panic("EXT3-fs (device %s): panic forced after error\n",
186 void ext3_error (struct super_block * sb, const char * function,
187 const char * fmt, ...)
192 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
197 ext3_handle_error(sb);
200 static const char *ext3_decode_error(struct super_block * sb, int errno,
207 errstr = "IO failure";
210 errstr = "Out of memory";
213 if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT)
214 errstr = "Journal has aborted";
216 errstr = "Readonly filesystem";
219 /* If the caller passed in an extra buffer for unknown
220 * errors, textualise them now. Else we just return
223 /* Check for truncated error codes... */
224 if (snprintf(nbuf, 16, "error %d", -errno) >= 0)
233 /* __ext3_std_error decodes expected errors from journaling functions
234 * automatically and invokes the appropriate error response. */
236 void __ext3_std_error (struct super_block * sb, const char * function,
242 /* Special case: if the error is EROFS, and we're not already
243 * inside a transaction, then there's really no point in logging
245 if (errno == -EROFS && journal_current_handle() == NULL &&
246 (sb->s_flags & MS_RDONLY))
249 errstr = ext3_decode_error(sb, errno, nbuf);
250 printk (KERN_CRIT "EXT3-fs error (device %s) in %s: %s\n",
251 sb->s_id, function, errstr);
253 ext3_handle_error(sb);
257 * ext3_abort is a much stronger failure handler than ext3_error. The
258 * abort function may be used to deal with unrecoverable failures such
259 * as journal IO errors or ENOMEM at a critical moment in log management.
261 * We unconditionally force the filesystem into an ABORT|READONLY state,
262 * unless the error response on the fs has been set to panic in which
263 * case we take the easy way out and panic immediately.
266 void ext3_abort (struct super_block * sb, const char * function,
267 const char * fmt, ...)
271 printk (KERN_CRIT "ext3_abort called.\n");
274 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
279 if (test_opt(sb, ERRORS_PANIC))
280 panic("EXT3-fs panic from previous error\n");
282 if (sb->s_flags & MS_RDONLY)
285 printk(KERN_CRIT "Remounting filesystem read-only\n");
286 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
287 sb->s_flags |= MS_RDONLY;
288 EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
289 if (EXT3_SB(sb)->s_journal)
290 journal_abort(EXT3_SB(sb)->s_journal, -EIO);
293 void ext3_warning (struct super_block * sb, const char * function,
294 const char * fmt, ...)
299 printk(KERN_WARNING "EXT3-fs warning (device %s): %s: ",
306 void ext3_update_dynamic_rev(struct super_block *sb)
308 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
310 if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV)
313 ext3_warning(sb, __func__,
314 "updating to rev %d because of new feature flag, "
315 "running e2fsck is recommended",
318 es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO);
319 es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE);
320 es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV);
321 /* leave es->s_feature_*compat flags alone */
322 /* es->s_uuid will be set by e2fsck if empty */
325 * The rest of the superblock fields should be zero, and if not it
326 * means they are likely already in use, so leave them alone. We
327 * can leave it up to e2fsck to clean up any inconsistencies there.
332 * Open the external journal device
334 static struct block_device *ext3_blkdev_get(dev_t dev)
336 struct block_device *bdev;
337 char b[BDEVNAME_SIZE];
339 bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE);
345 printk(KERN_ERR "EXT3: failed to open journal device %s: %ld\n",
346 __bdevname(dev, b), PTR_ERR(bdev));
351 * Release the journal device
353 static int ext3_blkdev_put(struct block_device *bdev)
356 return blkdev_put(bdev, FMODE_READ|FMODE_WRITE);
359 static int ext3_blkdev_remove(struct ext3_sb_info *sbi)
361 struct block_device *bdev;
364 bdev = sbi->journal_bdev;
366 ret = ext3_blkdev_put(bdev);
367 sbi->journal_bdev = NULL;
372 static inline struct inode *orphan_list_entry(struct list_head *l)
374 return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode;
377 static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
381 printk(KERN_ERR "sb orphan head is %d\n",
382 le32_to_cpu(sbi->s_es->s_last_orphan));
384 printk(KERN_ERR "sb_info orphan list:\n");
385 list_for_each(l, &sbi->s_orphan) {
386 struct inode *inode = orphan_list_entry(l);
388 "inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
389 inode->i_sb->s_id, inode->i_ino, inode,
390 inode->i_mode, inode->i_nlink,
395 static void ext3_put_super (struct super_block * sb)
397 struct ext3_sb_info *sbi = EXT3_SB(sb);
398 struct ext3_super_block *es = sbi->s_es;
401 ext3_xattr_put_super(sb);
402 err = journal_destroy(sbi->s_journal);
403 sbi->s_journal = NULL;
405 ext3_abort(sb, __func__, "Couldn't clean up the journal");
407 if (!(sb->s_flags & MS_RDONLY)) {
408 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
409 es->s_state = cpu_to_le16(sbi->s_mount_state);
410 BUFFER_TRACE(sbi->s_sbh, "marking dirty");
411 mark_buffer_dirty(sbi->s_sbh);
412 ext3_commit_super(sb, es, 1);
415 for (i = 0; i < sbi->s_gdb_count; i++)
416 brelse(sbi->s_group_desc[i]);
417 kfree(sbi->s_group_desc);
418 percpu_counter_destroy(&sbi->s_freeblocks_counter);
419 percpu_counter_destroy(&sbi->s_freeinodes_counter);
420 percpu_counter_destroy(&sbi->s_dirs_counter);
423 for (i = 0; i < MAXQUOTAS; i++)
424 kfree(sbi->s_qf_names[i]);
427 /* Debugging code just in case the in-memory inode orphan list
428 * isn't empty. The on-disk one can be non-empty if we've
429 * detected an error and taken the fs readonly, but the
430 * in-memory list had better be clean by this point. */
431 if (!list_empty(&sbi->s_orphan))
432 dump_orphan_list(sb, sbi);
433 J_ASSERT(list_empty(&sbi->s_orphan));
435 invalidate_bdev(sb->s_bdev);
436 if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) {
438 * Invalidate the journal device's buffers. We don't want them
439 * floating about in memory - the physical journal device may
440 * hotswapped, and it breaks the `ro-after' testing code.
442 sync_blockdev(sbi->journal_bdev);
443 invalidate_bdev(sbi->journal_bdev);
444 ext3_blkdev_remove(sbi);
446 sb->s_fs_info = NULL;
447 kfree(sbi->s_blockgroup_lock);
452 static struct kmem_cache *ext3_inode_cachep;
455 * Called inside transaction, so use GFP_NOFS
457 static struct inode *ext3_alloc_inode(struct super_block *sb)
459 struct ext3_inode_info *ei;
461 ei = kmem_cache_alloc(ext3_inode_cachep, GFP_NOFS);
464 #ifdef CONFIG_EXT3_FS_POSIX_ACL
465 ei->i_acl = EXT3_ACL_NOT_CACHED;
466 ei->i_default_acl = EXT3_ACL_NOT_CACHED;
468 ei->i_block_alloc_info = NULL;
469 ei->vfs_inode.i_version = 1;
470 return &ei->vfs_inode;
473 static void ext3_destroy_inode(struct inode *inode)
475 if (!list_empty(&(EXT3_I(inode)->i_orphan))) {
476 printk("EXT3 Inode %p: orphan list check failed!\n",
478 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4,
479 EXT3_I(inode), sizeof(struct ext3_inode_info),
483 kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
486 static void init_once(void *foo)
488 struct ext3_inode_info *ei = (struct ext3_inode_info *) foo;
490 INIT_LIST_HEAD(&ei->i_orphan);
491 #ifdef CONFIG_EXT3_FS_XATTR
492 init_rwsem(&ei->xattr_sem);
494 mutex_init(&ei->truncate_mutex);
495 inode_init_once(&ei->vfs_inode);
498 static int init_inodecache(void)
500 ext3_inode_cachep = kmem_cache_create("ext3_inode_cache",
501 sizeof(struct ext3_inode_info),
502 0, (SLAB_RECLAIM_ACCOUNT|
505 if (ext3_inode_cachep == NULL)
510 static void destroy_inodecache(void)
512 kmem_cache_destroy(ext3_inode_cachep);
515 static void ext3_clear_inode(struct inode *inode)
517 struct ext3_block_alloc_info *rsv = EXT3_I(inode)->i_block_alloc_info;
518 #ifdef CONFIG_EXT3_FS_POSIX_ACL
519 if (EXT3_I(inode)->i_acl &&
520 EXT3_I(inode)->i_acl != EXT3_ACL_NOT_CACHED) {
521 posix_acl_release(EXT3_I(inode)->i_acl);
522 EXT3_I(inode)->i_acl = EXT3_ACL_NOT_CACHED;
524 if (EXT3_I(inode)->i_default_acl &&
525 EXT3_I(inode)->i_default_acl != EXT3_ACL_NOT_CACHED) {
526 posix_acl_release(EXT3_I(inode)->i_default_acl);
527 EXT3_I(inode)->i_default_acl = EXT3_ACL_NOT_CACHED;
530 ext3_discard_reservation(inode);
531 EXT3_I(inode)->i_block_alloc_info = NULL;
536 static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb)
538 #if defined(CONFIG_QUOTA)
539 struct ext3_sb_info *sbi = EXT3_SB(sb);
541 if (sbi->s_jquota_fmt)
542 seq_printf(seq, ",jqfmt=%s",
543 (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0");
545 if (sbi->s_qf_names[USRQUOTA])
546 seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]);
548 if (sbi->s_qf_names[GRPQUOTA])
549 seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]);
551 if (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA)
552 seq_puts(seq, ",usrquota");
554 if (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)
555 seq_puts(seq, ",grpquota");
561 * - it's set to a non-default value OR
562 * - if the per-sb default is different from the global default
564 static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
566 struct super_block *sb = vfs->mnt_sb;
567 struct ext3_sb_info *sbi = EXT3_SB(sb);
568 struct ext3_super_block *es = sbi->s_es;
569 unsigned long def_mount_opts;
571 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
573 if (sbi->s_sb_block != 1)
574 seq_printf(seq, ",sb=%lu", sbi->s_sb_block);
575 if (test_opt(sb, MINIX_DF))
576 seq_puts(seq, ",minixdf");
577 if (test_opt(sb, GRPID))
578 seq_puts(seq, ",grpid");
579 if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS))
580 seq_puts(seq, ",nogrpid");
581 if (sbi->s_resuid != EXT3_DEF_RESUID ||
582 le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) {
583 seq_printf(seq, ",resuid=%u", sbi->s_resuid);
585 if (sbi->s_resgid != EXT3_DEF_RESGID ||
586 le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) {
587 seq_printf(seq, ",resgid=%u", sbi->s_resgid);
589 if (test_opt(sb, ERRORS_RO)) {
590 int def_errors = le16_to_cpu(es->s_errors);
592 if (def_errors == EXT3_ERRORS_PANIC ||
593 def_errors == EXT3_ERRORS_CONTINUE) {
594 seq_puts(seq, ",errors=remount-ro");
597 if (test_opt(sb, ERRORS_CONT))
598 seq_puts(seq, ",errors=continue");
599 if (test_opt(sb, ERRORS_PANIC))
600 seq_puts(seq, ",errors=panic");
601 if (test_opt(sb, NO_UID32))
602 seq_puts(seq, ",nouid32");
603 if (test_opt(sb, DEBUG))
604 seq_puts(seq, ",debug");
605 if (test_opt(sb, OLDALLOC))
606 seq_puts(seq, ",oldalloc");
607 #ifdef CONFIG_EXT3_FS_XATTR
608 if (test_opt(sb, XATTR_USER))
609 seq_puts(seq, ",user_xattr");
610 if (!test_opt(sb, XATTR_USER) &&
611 (def_mount_opts & EXT3_DEFM_XATTR_USER)) {
612 seq_puts(seq, ",nouser_xattr");
615 #ifdef CONFIG_EXT3_FS_POSIX_ACL
616 if (test_opt(sb, POSIX_ACL))
617 seq_puts(seq, ",acl");
618 if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL))
619 seq_puts(seq, ",noacl");
621 if (!test_opt(sb, RESERVATION))
622 seq_puts(seq, ",noreservation");
623 if (sbi->s_commit_interval) {
624 seq_printf(seq, ",commit=%u",
625 (unsigned) (sbi->s_commit_interval / HZ));
627 if (test_opt(sb, BARRIER))
628 seq_puts(seq, ",barrier=1");
629 if (test_opt(sb, NOBH))
630 seq_puts(seq, ",nobh");
632 if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA)
633 seq_puts(seq, ",data=journal");
634 else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA)
635 seq_puts(seq, ",data=ordered");
636 else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)
637 seq_puts(seq, ",data=writeback");
639 if (test_opt(sb, DATA_ERR_ABORT))
640 seq_puts(seq, ",data_err=abort");
642 ext3_show_quota_options(seq, sb);
648 static struct inode *ext3_nfs_get_inode(struct super_block *sb,
649 u64 ino, u32 generation)
653 if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO)
654 return ERR_PTR(-ESTALE);
655 if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count))
656 return ERR_PTR(-ESTALE);
658 /* iget isn't really right if the inode is currently unallocated!!
660 * ext3_read_inode will return a bad_inode if the inode had been
661 * deleted, so we should be safe.
663 * Currently we don't know the generation for parent directory, so
664 * a generation of 0 means "accept any"
666 inode = ext3_iget(sb, ino);
668 return ERR_CAST(inode);
669 if (generation && inode->i_generation != generation) {
671 return ERR_PTR(-ESTALE);
677 static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid,
678 int fh_len, int fh_type)
680 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
684 static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid,
685 int fh_len, int fh_type)
687 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
692 * Try to release metadata pages (indirect blocks, directories) which are
693 * mapped via the block device. Since these pages could have journal heads
694 * which would prevent try_to_free_buffers() from freeing them, we must use
695 * jbd layer's try_to_free_buffers() function to release them.
697 static int bdev_try_to_free_page(struct super_block *sb, struct page *page,
700 journal_t *journal = EXT3_SB(sb)->s_journal;
702 WARN_ON(PageChecked(page));
703 if (!page_has_buffers(page))
706 return journal_try_to_free_buffers(journal, page,
708 return try_to_free_buffers(page);
712 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
713 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
715 static int ext3_write_dquot(struct dquot *dquot);
716 static int ext3_acquire_dquot(struct dquot *dquot);
717 static int ext3_release_dquot(struct dquot *dquot);
718 static int ext3_mark_dquot_dirty(struct dquot *dquot);
719 static int ext3_write_info(struct super_block *sb, int type);
720 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
721 char *path, int remount);
722 static int ext3_quota_on_mount(struct super_block *sb, int type);
723 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
724 size_t len, loff_t off);
725 static ssize_t ext3_quota_write(struct super_block *sb, int type,
726 const char *data, size_t len, loff_t off);
728 static struct dquot_operations ext3_quota_operations = {
729 .initialize = dquot_initialize,
731 .alloc_space = dquot_alloc_space,
732 .alloc_inode = dquot_alloc_inode,
733 .free_space = dquot_free_space,
734 .free_inode = dquot_free_inode,
735 .transfer = dquot_transfer,
736 .write_dquot = ext3_write_dquot,
737 .acquire_dquot = ext3_acquire_dquot,
738 .release_dquot = ext3_release_dquot,
739 .mark_dirty = ext3_mark_dquot_dirty,
740 .write_info = ext3_write_info,
741 .alloc_dquot = dquot_alloc,
742 .destroy_dquot = dquot_destroy,
745 static struct quotactl_ops ext3_qctl_operations = {
746 .quota_on = ext3_quota_on,
747 .quota_off = vfs_quota_off,
748 .quota_sync = vfs_quota_sync,
749 .get_info = vfs_get_dqinfo,
750 .set_info = vfs_set_dqinfo,
751 .get_dqblk = vfs_get_dqblk,
752 .set_dqblk = vfs_set_dqblk
756 static const struct super_operations ext3_sops = {
757 .alloc_inode = ext3_alloc_inode,
758 .destroy_inode = ext3_destroy_inode,
759 .write_inode = ext3_write_inode,
760 .dirty_inode = ext3_dirty_inode,
761 .delete_inode = ext3_delete_inode,
762 .put_super = ext3_put_super,
763 .sync_fs = ext3_sync_fs,
764 .freeze_fs = ext3_freeze,
765 .unfreeze_fs = ext3_unfreeze,
766 .statfs = ext3_statfs,
767 .remount_fs = ext3_remount,
768 .clear_inode = ext3_clear_inode,
769 .show_options = ext3_show_options,
771 .quota_read = ext3_quota_read,
772 .quota_write = ext3_quota_write,
774 .bdev_try_to_free_page = bdev_try_to_free_page,
777 static const struct export_operations ext3_export_ops = {
778 .fh_to_dentry = ext3_fh_to_dentry,
779 .fh_to_parent = ext3_fh_to_parent,
780 .get_parent = ext3_get_parent,
784 Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
785 Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
786 Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
787 Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
788 Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
789 Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
790 Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
791 Opt_data_err_abort, Opt_data_err_ignore,
792 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
793 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
794 Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
798 static const match_table_t tokens = {
799 {Opt_bsd_df, "bsddf"},
800 {Opt_minix_df, "minixdf"},
801 {Opt_grpid, "grpid"},
802 {Opt_grpid, "bsdgroups"},
803 {Opt_nogrpid, "nogrpid"},
804 {Opt_nogrpid, "sysvgroups"},
805 {Opt_resgid, "resgid=%u"},
806 {Opt_resuid, "resuid=%u"},
808 {Opt_err_cont, "errors=continue"},
809 {Opt_err_panic, "errors=panic"},
810 {Opt_err_ro, "errors=remount-ro"},
811 {Opt_nouid32, "nouid32"},
812 {Opt_nocheck, "nocheck"},
813 {Opt_nocheck, "check=none"},
814 {Opt_debug, "debug"},
815 {Opt_oldalloc, "oldalloc"},
816 {Opt_orlov, "orlov"},
817 {Opt_user_xattr, "user_xattr"},
818 {Opt_nouser_xattr, "nouser_xattr"},
820 {Opt_noacl, "noacl"},
821 {Opt_reservation, "reservation"},
822 {Opt_noreservation, "noreservation"},
823 {Opt_noload, "noload"},
826 {Opt_commit, "commit=%u"},
827 {Opt_journal_update, "journal=update"},
828 {Opt_journal_inum, "journal=%u"},
829 {Opt_journal_dev, "journal_dev=%u"},
830 {Opt_abort, "abort"},
831 {Opt_data_journal, "data=journal"},
832 {Opt_data_ordered, "data=ordered"},
833 {Opt_data_writeback, "data=writeback"},
834 {Opt_data_err_abort, "data_err=abort"},
835 {Opt_data_err_ignore, "data_err=ignore"},
836 {Opt_offusrjquota, "usrjquota="},
837 {Opt_usrjquota, "usrjquota=%s"},
838 {Opt_offgrpjquota, "grpjquota="},
839 {Opt_grpjquota, "grpjquota=%s"},
840 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
841 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
842 {Opt_grpquota, "grpquota"},
843 {Opt_noquota, "noquota"},
844 {Opt_quota, "quota"},
845 {Opt_usrquota, "usrquota"},
846 {Opt_barrier, "barrier=%u"},
847 {Opt_resize, "resize"},
851 static ext3_fsblk_t get_sb_block(void **data)
853 ext3_fsblk_t sb_block;
854 char *options = (char *) *data;
856 if (!options || strncmp(options, "sb=", 3) != 0)
857 return 1; /* Default location */
859 /*todo: use simple_strtoll with >32bit ext3 */
860 sb_block = simple_strtoul(options, &options, 0);
861 if (*options && *options != ',') {
862 printk("EXT3-fs: Invalid sb specification: %s\n",
868 *data = (void *) options;
872 static int parse_options (char *options, struct super_block *sb,
873 unsigned int *inum, unsigned long *journal_devnum,
874 ext3_fsblk_t *n_blocks_count, int is_remount)
876 struct ext3_sb_info *sbi = EXT3_SB(sb);
878 substring_t args[MAX_OPT_ARGS];
889 while ((p = strsep (&options, ",")) != NULL) {
894 token = match_token(p, tokens, args);
897 clear_opt (sbi->s_mount_opt, MINIX_DF);
900 set_opt (sbi->s_mount_opt, MINIX_DF);
903 set_opt (sbi->s_mount_opt, GRPID);
906 clear_opt (sbi->s_mount_opt, GRPID);
909 if (match_int(&args[0], &option))
911 sbi->s_resuid = option;
914 if (match_int(&args[0], &option))
916 sbi->s_resgid = option;
919 /* handled by get_sb_block() instead of here */
920 /* *sb_block = match_int(&args[0]); */
923 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
924 clear_opt (sbi->s_mount_opt, ERRORS_RO);
925 set_opt (sbi->s_mount_opt, ERRORS_PANIC);
928 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
929 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
930 set_opt (sbi->s_mount_opt, ERRORS_RO);
933 clear_opt (sbi->s_mount_opt, ERRORS_RO);
934 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
935 set_opt (sbi->s_mount_opt, ERRORS_CONT);
938 set_opt (sbi->s_mount_opt, NO_UID32);
941 clear_opt (sbi->s_mount_opt, CHECK);
944 set_opt (sbi->s_mount_opt, DEBUG);
947 set_opt (sbi->s_mount_opt, OLDALLOC);
950 clear_opt (sbi->s_mount_opt, OLDALLOC);
952 #ifdef CONFIG_EXT3_FS_XATTR
954 set_opt (sbi->s_mount_opt, XATTR_USER);
956 case Opt_nouser_xattr:
957 clear_opt (sbi->s_mount_opt, XATTR_USER);
961 case Opt_nouser_xattr:
962 printk("EXT3 (no)user_xattr options not supported\n");
965 #ifdef CONFIG_EXT3_FS_POSIX_ACL
967 set_opt(sbi->s_mount_opt, POSIX_ACL);
970 clear_opt(sbi->s_mount_opt, POSIX_ACL);
975 printk("EXT3 (no)acl options not supported\n");
978 case Opt_reservation:
979 set_opt(sbi->s_mount_opt, RESERVATION);
981 case Opt_noreservation:
982 clear_opt(sbi->s_mount_opt, RESERVATION);
984 case Opt_journal_update:
986 /* Eventually we will want to be able to create
987 a journal file here. For now, only allow the
988 user to specify an existing inode to be the
991 printk(KERN_ERR "EXT3-fs: cannot specify "
992 "journal on remount\n");
995 set_opt (sbi->s_mount_opt, UPDATE_JOURNAL);
997 case Opt_journal_inum:
999 printk(KERN_ERR "EXT3-fs: cannot specify "
1000 "journal on remount\n");
1003 if (match_int(&args[0], &option))
1007 case Opt_journal_dev:
1009 printk(KERN_ERR "EXT3-fs: cannot specify "
1010 "journal on remount\n");
1013 if (match_int(&args[0], &option))
1015 *journal_devnum = option;
1018 set_opt (sbi->s_mount_opt, NOLOAD);
1021 if (match_int(&args[0], &option))
1026 option = JBD_DEFAULT_MAX_COMMIT_AGE;
1027 sbi->s_commit_interval = HZ * option;
1029 case Opt_data_journal:
1030 data_opt = EXT3_MOUNT_JOURNAL_DATA;
1032 case Opt_data_ordered:
1033 data_opt = EXT3_MOUNT_ORDERED_DATA;
1035 case Opt_data_writeback:
1036 data_opt = EXT3_MOUNT_WRITEBACK_DATA;
1039 if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS)
1042 "EXT3-fs: cannot change data "
1043 "mode on remount\n");
1047 sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS;
1048 sbi->s_mount_opt |= data_opt;
1051 case Opt_data_err_abort:
1052 set_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1054 case Opt_data_err_ignore:
1055 clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1064 if (sb_any_quota_loaded(sb) &&
1065 !sbi->s_qf_names[qtype]) {
1067 "EXT3-fs: Cannot change journaled "
1068 "quota options when quota turned on.\n");
1071 qname = match_strdup(&args[0]);
1074 "EXT3-fs: not enough memory for "
1075 "storing quotafile name.\n");
1078 if (sbi->s_qf_names[qtype] &&
1079 strcmp(sbi->s_qf_names[qtype], qname)) {
1081 "EXT3-fs: %s quota file already "
1082 "specified.\n", QTYPE2NAME(qtype));
1086 sbi->s_qf_names[qtype] = qname;
1087 if (strchr(sbi->s_qf_names[qtype], '/')) {
1089 "EXT3-fs: quotafile must be on "
1090 "filesystem root.\n");
1091 kfree(sbi->s_qf_names[qtype]);
1092 sbi->s_qf_names[qtype] = NULL;
1095 set_opt(sbi->s_mount_opt, QUOTA);
1097 case Opt_offusrjquota:
1100 case Opt_offgrpjquota:
1103 if (sb_any_quota_loaded(sb) &&
1104 sbi->s_qf_names[qtype]) {
1105 printk(KERN_ERR "EXT3-fs: Cannot change "
1106 "journaled quota options when "
1107 "quota turned on.\n");
1111 * The space will be released later when all options
1112 * are confirmed to be correct
1114 sbi->s_qf_names[qtype] = NULL;
1116 case Opt_jqfmt_vfsold:
1117 qfmt = QFMT_VFS_OLD;
1119 case Opt_jqfmt_vfsv0:
1122 if (sb_any_quota_loaded(sb) &&
1123 sbi->s_jquota_fmt != qfmt) {
1124 printk(KERN_ERR "EXT3-fs: Cannot change "
1125 "journaled quota options when "
1126 "quota turned on.\n");
1129 sbi->s_jquota_fmt = qfmt;
1133 set_opt(sbi->s_mount_opt, QUOTA);
1134 set_opt(sbi->s_mount_opt, USRQUOTA);
1137 set_opt(sbi->s_mount_opt, QUOTA);
1138 set_opt(sbi->s_mount_opt, GRPQUOTA);
1141 if (sb_any_quota_loaded(sb)) {
1142 printk(KERN_ERR "EXT3-fs: Cannot change quota "
1143 "options when quota turned on.\n");
1146 clear_opt(sbi->s_mount_opt, QUOTA);
1147 clear_opt(sbi->s_mount_opt, USRQUOTA);
1148 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1155 "EXT3-fs: quota options not supported.\n");
1159 case Opt_offusrjquota:
1160 case Opt_offgrpjquota:
1161 case Opt_jqfmt_vfsold:
1162 case Opt_jqfmt_vfsv0:
1164 "EXT3-fs: journaled quota options not "
1171 set_opt(sbi->s_mount_opt, ABORT);
1174 if (match_int(&args[0], &option))
1177 set_opt(sbi->s_mount_opt, BARRIER);
1179 clear_opt(sbi->s_mount_opt, BARRIER);
1185 printk("EXT3-fs: resize option only available "
1189 if (match_int(&args[0], &option) != 0)
1191 *n_blocks_count = option;
1194 set_opt(sbi->s_mount_opt, NOBH);
1197 clear_opt(sbi->s_mount_opt, NOBH);
1201 "EXT3-fs: Unrecognized mount option \"%s\" "
1202 "or missing value\n", p);
1207 if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
1208 if ((sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) &&
1209 sbi->s_qf_names[USRQUOTA])
1210 clear_opt(sbi->s_mount_opt, USRQUOTA);
1212 if ((sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) &&
1213 sbi->s_qf_names[GRPQUOTA])
1214 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1216 if ((sbi->s_qf_names[USRQUOTA] &&
1217 (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)) ||
1218 (sbi->s_qf_names[GRPQUOTA] &&
1219 (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA))) {
1220 printk(KERN_ERR "EXT3-fs: old and new quota "
1221 "format mixing.\n");
1225 if (!sbi->s_jquota_fmt) {
1226 printk(KERN_ERR "EXT3-fs: journaled quota format "
1227 "not specified.\n");
1231 if (sbi->s_jquota_fmt) {
1232 printk(KERN_ERR "EXT3-fs: journaled quota format "
1233 "specified with no journaling "
1242 static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es,
1245 struct ext3_sb_info *sbi = EXT3_SB(sb);
1248 if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) {
1249 printk (KERN_ERR "EXT3-fs warning: revision level too high, "
1250 "forcing read-only mode\n");
1255 if (!(sbi->s_mount_state & EXT3_VALID_FS))
1256 printk (KERN_WARNING "EXT3-fs warning: mounting unchecked fs, "
1257 "running e2fsck is recommended\n");
1258 else if ((sbi->s_mount_state & EXT3_ERROR_FS))
1259 printk (KERN_WARNING
1260 "EXT3-fs warning: mounting fs with errors, "
1261 "running e2fsck is recommended\n");
1262 else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 &&
1263 le16_to_cpu(es->s_mnt_count) >=
1264 (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))
1265 printk (KERN_WARNING
1266 "EXT3-fs warning: maximal mount count reached, "
1267 "running e2fsck is recommended\n");
1268 else if (le32_to_cpu(es->s_checkinterval) &&
1269 (le32_to_cpu(es->s_lastcheck) +
1270 le32_to_cpu(es->s_checkinterval) <= get_seconds()))
1271 printk (KERN_WARNING
1272 "EXT3-fs warning: checktime reached, "
1273 "running e2fsck is recommended\n");
1275 /* @@@ We _will_ want to clear the valid bit if we find
1276 inconsistencies, to force a fsck at reboot. But for
1277 a plain journaled filesystem we can keep it set as
1278 valid forever! :) */
1279 es->s_state &= cpu_to_le16(~EXT3_VALID_FS);
1281 if (!(__s16) le16_to_cpu(es->s_max_mnt_count))
1282 es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT);
1283 le16_add_cpu(&es->s_mnt_count, 1);
1284 es->s_mtime = cpu_to_le32(get_seconds());
1285 ext3_update_dynamic_rev(sb);
1286 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
1288 ext3_commit_super(sb, es, 1);
1289 if (test_opt(sb, DEBUG))
1290 printk(KERN_INFO "[EXT3 FS bs=%lu, gc=%lu, "
1291 "bpg=%lu, ipg=%lu, mo=%04lx]\n",
1293 sbi->s_groups_count,
1294 EXT3_BLOCKS_PER_GROUP(sb),
1295 EXT3_INODES_PER_GROUP(sb),
1298 printk(KERN_INFO "EXT3 FS on %s, ", sb->s_id);
1299 if (EXT3_SB(sb)->s_journal->j_inode == NULL) {
1300 char b[BDEVNAME_SIZE];
1302 printk("external journal on %s\n",
1303 bdevname(EXT3_SB(sb)->s_journal->j_dev, b));
1305 printk("internal journal\n");
1310 /* Called at mount-time, super-block is locked */
1311 static int ext3_check_descriptors(struct super_block *sb)
1313 struct ext3_sb_info *sbi = EXT3_SB(sb);
1316 ext3_debug ("Checking group descriptors");
1318 for (i = 0; i < sbi->s_groups_count; i++) {
1319 struct ext3_group_desc *gdp = ext3_get_group_desc(sb, i, NULL);
1320 ext3_fsblk_t first_block = ext3_group_first_block_no(sb, i);
1321 ext3_fsblk_t last_block;
1323 if (i == sbi->s_groups_count - 1)
1324 last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
1326 last_block = first_block +
1327 (EXT3_BLOCKS_PER_GROUP(sb) - 1);
1329 if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
1330 le32_to_cpu(gdp->bg_block_bitmap) > last_block)
1332 ext3_error (sb, "ext3_check_descriptors",
1333 "Block bitmap for group %d"
1334 " not in group (block %lu)!",
1336 le32_to_cpu(gdp->bg_block_bitmap));
1339 if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block ||
1340 le32_to_cpu(gdp->bg_inode_bitmap) > last_block)
1342 ext3_error (sb, "ext3_check_descriptors",
1343 "Inode bitmap for group %d"
1344 " not in group (block %lu)!",
1346 le32_to_cpu(gdp->bg_inode_bitmap));
1349 if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
1350 le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 >
1353 ext3_error (sb, "ext3_check_descriptors",
1354 "Inode table for group %d"
1355 " not in group (block %lu)!",
1357 le32_to_cpu(gdp->bg_inode_table));
1362 sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb));
1363 sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb));
1368 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1369 * the superblock) which were deleted from all directories, but held open by
1370 * a process at the time of a crash. We walk the list and try to delete these
1371 * inodes at recovery time (only with a read-write filesystem).
1373 * In order to keep the orphan inode chain consistent during traversal (in
1374 * case of crash during recovery), we link each inode into the superblock
1375 * orphan list_head and handle it the same way as an inode deletion during
1376 * normal operation (which journals the operations for us).
1378 * We only do an iget() and an iput() on each inode, which is very safe if we
1379 * accidentally point at an in-use or already deleted inode. The worst that
1380 * can happen in this case is that we get a "bit already cleared" message from
1381 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1382 * e2fsck was run on this filesystem, and it must have already done the orphan
1383 * inode cleanup for us, so we can safely abort without any further action.
1385 static void ext3_orphan_cleanup (struct super_block * sb,
1386 struct ext3_super_block * es)
1388 unsigned int s_flags = sb->s_flags;
1389 int nr_orphans = 0, nr_truncates = 0;
1393 if (!es->s_last_orphan) {
1394 jbd_debug(4, "no orphan inodes to clean up\n");
1398 if (bdev_read_only(sb->s_bdev)) {
1399 printk(KERN_ERR "EXT3-fs: write access "
1400 "unavailable, skipping orphan cleanup.\n");
1404 if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) {
1405 if (es->s_last_orphan)
1406 jbd_debug(1, "Errors on filesystem, "
1407 "clearing orphan list.\n");
1408 es->s_last_orphan = 0;
1409 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1413 if (s_flags & MS_RDONLY) {
1414 printk(KERN_INFO "EXT3-fs: %s: orphan cleanup on readonly fs\n",
1416 sb->s_flags &= ~MS_RDONLY;
1419 /* Needed for iput() to work correctly and not trash data */
1420 sb->s_flags |= MS_ACTIVE;
1421 /* Turn on quotas so that they are updated correctly */
1422 for (i = 0; i < MAXQUOTAS; i++) {
1423 if (EXT3_SB(sb)->s_qf_names[i]) {
1424 int ret = ext3_quota_on_mount(sb, i);
1427 "EXT3-fs: Cannot turn on journaled "
1428 "quota: error %d\n", ret);
1433 while (es->s_last_orphan) {
1434 struct inode *inode;
1436 inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan));
1437 if (IS_ERR(inode)) {
1438 es->s_last_orphan = 0;
1442 list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan);
1444 if (inode->i_nlink) {
1446 "%s: truncating inode %lu to %Ld bytes\n",
1447 __func__, inode->i_ino, inode->i_size);
1448 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1449 inode->i_ino, inode->i_size);
1450 ext3_truncate(inode);
1454 "%s: deleting unreferenced inode %lu\n",
1455 __func__, inode->i_ino);
1456 jbd_debug(2, "deleting unreferenced inode %lu\n",
1460 iput(inode); /* The delete magic happens here! */
1463 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1466 printk(KERN_INFO "EXT3-fs: %s: %d orphan inode%s deleted\n",
1467 sb->s_id, PLURAL(nr_orphans));
1469 printk(KERN_INFO "EXT3-fs: %s: %d truncate%s cleaned up\n",
1470 sb->s_id, PLURAL(nr_truncates));
1472 /* Turn quotas off */
1473 for (i = 0; i < MAXQUOTAS; i++) {
1474 if (sb_dqopt(sb)->files[i])
1475 vfs_quota_off(sb, i, 0);
1478 sb->s_flags = s_flags; /* Restore MS_RDONLY status */
1482 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1483 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1484 * We need to be 1 filesystem block less than the 2^32 sector limit.
1486 static loff_t ext3_max_size(int bits)
1488 loff_t res = EXT3_NDIR_BLOCKS;
1492 /* This is calculated to be the largest file size for a
1493 * dense, file such that the total number of
1494 * sectors in the file, including data and all indirect blocks,
1495 * does not exceed 2^32 -1
1496 * __u32 i_blocks representing the total number of
1497 * 512 bytes blocks of the file
1499 upper_limit = (1LL << 32) - 1;
1501 /* total blocks in file system block size */
1502 upper_limit >>= (bits - 9);
1505 /* indirect blocks */
1507 /* double indirect blocks */
1508 meta_blocks += 1 + (1LL << (bits-2));
1509 /* tripple indirect blocks */
1510 meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
1512 upper_limit -= meta_blocks;
1513 upper_limit <<= bits;
1515 res += 1LL << (bits-2);
1516 res += 1LL << (2*(bits-2));
1517 res += 1LL << (3*(bits-2));
1519 if (res > upper_limit)
1522 if (res > MAX_LFS_FILESIZE)
1523 res = MAX_LFS_FILESIZE;
1528 static ext3_fsblk_t descriptor_loc(struct super_block *sb,
1529 ext3_fsblk_t logic_sb_block,
1532 struct ext3_sb_info *sbi = EXT3_SB(sb);
1533 unsigned long bg, first_meta_bg;
1536 first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
1538 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) ||
1540 return (logic_sb_block + nr + 1);
1541 bg = sbi->s_desc_per_block * nr;
1542 if (ext3_bg_has_super(sb, bg))
1544 return (has_super + ext3_group_first_block_no(sb, bg));
1548 static int ext3_fill_super (struct super_block *sb, void *data, int silent)
1550 struct buffer_head * bh;
1551 struct ext3_super_block *es = NULL;
1552 struct ext3_sb_info *sbi;
1554 ext3_fsblk_t sb_block = get_sb_block(&data);
1555 ext3_fsblk_t logic_sb_block;
1556 unsigned long offset = 0;
1557 unsigned int journal_inum = 0;
1558 unsigned long journal_devnum = 0;
1559 unsigned long def_mount_opts;
1570 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
1574 sbi->s_blockgroup_lock =
1575 kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
1576 if (!sbi->s_blockgroup_lock) {
1580 sb->s_fs_info = sbi;
1581 sbi->s_mount_opt = 0;
1582 sbi->s_resuid = EXT3_DEF_RESUID;
1583 sbi->s_resgid = EXT3_DEF_RESGID;
1584 sbi->s_sb_block = sb_block;
1588 blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE);
1590 printk(KERN_ERR "EXT3-fs: unable to set blocksize\n");
1595 * The ext3 superblock will not be buffer aligned for other than 1kB
1596 * block sizes. We need to calculate the offset from buffer start.
1598 if (blocksize != EXT3_MIN_BLOCK_SIZE) {
1599 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1600 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1602 logic_sb_block = sb_block;
1605 if (!(bh = sb_bread(sb, logic_sb_block))) {
1606 printk (KERN_ERR "EXT3-fs: unable to read superblock\n");
1610 * Note: s_es must be initialized as soon as possible because
1611 * some ext3 macro-instructions depend on its value
1613 es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
1615 sb->s_magic = le16_to_cpu(es->s_magic);
1616 if (sb->s_magic != EXT3_SUPER_MAGIC)
1619 /* Set defaults before we parse the mount options */
1620 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
1621 if (def_mount_opts & EXT3_DEFM_DEBUG)
1622 set_opt(sbi->s_mount_opt, DEBUG);
1623 if (def_mount_opts & EXT3_DEFM_BSDGROUPS)
1624 set_opt(sbi->s_mount_opt, GRPID);
1625 if (def_mount_opts & EXT3_DEFM_UID16)
1626 set_opt(sbi->s_mount_opt, NO_UID32);
1627 #ifdef CONFIG_EXT3_FS_XATTR
1628 if (def_mount_opts & EXT3_DEFM_XATTR_USER)
1629 set_opt(sbi->s_mount_opt, XATTR_USER);
1631 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1632 if (def_mount_opts & EXT3_DEFM_ACL)
1633 set_opt(sbi->s_mount_opt, POSIX_ACL);
1635 if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA)
1636 sbi->s_mount_opt |= EXT3_MOUNT_JOURNAL_DATA;
1637 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED)
1638 sbi->s_mount_opt |= EXT3_MOUNT_ORDERED_DATA;
1639 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK)
1640 sbi->s_mount_opt |= EXT3_MOUNT_WRITEBACK_DATA;
1642 if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC)
1643 set_opt(sbi->s_mount_opt, ERRORS_PANIC);
1644 else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_CONTINUE)
1645 set_opt(sbi->s_mount_opt, ERRORS_CONT);
1647 set_opt(sbi->s_mount_opt, ERRORS_RO);
1649 sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
1650 sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
1652 set_opt(sbi->s_mount_opt, RESERVATION);
1654 if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
1658 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1659 ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1661 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV &&
1662 (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) ||
1663 EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
1664 EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U)))
1666 "EXT3-fs warning: feature flags set on rev 0 fs, "
1667 "running e2fsck is recommended\n");
1669 * Check feature flags regardless of the revision level, since we
1670 * previously didn't change the revision level when setting the flags,
1671 * so there is a chance incompat flags are set on a rev 0 filesystem.
1673 features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP);
1675 printk(KERN_ERR "EXT3-fs: %s: couldn't mount because of "
1676 "unsupported optional features (%x).\n",
1677 sb->s_id, le32_to_cpu(features));
1680 features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP);
1681 if (!(sb->s_flags & MS_RDONLY) && features) {
1682 printk(KERN_ERR "EXT3-fs: %s: couldn't mount RDWR because of "
1683 "unsupported optional features (%x).\n",
1684 sb->s_id, le32_to_cpu(features));
1687 blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
1689 if (blocksize < EXT3_MIN_BLOCK_SIZE ||
1690 blocksize > EXT3_MAX_BLOCK_SIZE) {
1692 "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n",
1693 blocksize, sb->s_id);
1697 hblock = bdev_logical_block_size(sb->s_bdev);
1698 if (sb->s_blocksize != blocksize) {
1700 * Make sure the blocksize for the filesystem is larger
1701 * than the hardware sectorsize for the machine.
1703 if (blocksize < hblock) {
1704 printk(KERN_ERR "EXT3-fs: blocksize %d too small for "
1705 "device blocksize %d.\n", blocksize, hblock);
1710 if (!sb_set_blocksize(sb, blocksize)) {
1711 printk(KERN_ERR "EXT3-fs: bad blocksize %d.\n",
1715 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1716 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1717 bh = sb_bread(sb, logic_sb_block);
1720 "EXT3-fs: Can't read superblock on 2nd try.\n");
1723 es = (struct ext3_super_block *)(((char *)bh->b_data) + offset);
1725 if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) {
1727 "EXT3-fs: Magic mismatch, very weird !\n");
1732 sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits);
1734 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) {
1735 sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE;
1736 sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO;
1738 sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
1739 sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
1740 if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) ||
1741 (!is_power_of_2(sbi->s_inode_size)) ||
1742 (sbi->s_inode_size > blocksize)) {
1744 "EXT3-fs: unsupported inode size: %d\n",
1749 sbi->s_frag_size = EXT3_MIN_FRAG_SIZE <<
1750 le32_to_cpu(es->s_log_frag_size);
1751 if (blocksize != sbi->s_frag_size) {
1753 "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n",
1754 sbi->s_frag_size, blocksize);
1757 sbi->s_frags_per_block = 1;
1758 sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
1759 sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
1760 sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
1761 if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0)
1763 sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb);
1764 if (sbi->s_inodes_per_block == 0)
1766 sbi->s_itb_per_group = sbi->s_inodes_per_group /
1767 sbi->s_inodes_per_block;
1768 sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc);
1770 sbi->s_mount_state = le16_to_cpu(es->s_state);
1771 sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb));
1772 sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb));
1773 for (i=0; i < 4; i++)
1774 sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
1775 sbi->s_def_hash_version = es->s_def_hash_version;
1776 i = le32_to_cpu(es->s_flags);
1777 if (i & EXT2_FLAGS_UNSIGNED_HASH)
1778 sbi->s_hash_unsigned = 3;
1779 else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) {
1780 #ifdef __CHAR_UNSIGNED__
1781 es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH);
1782 sbi->s_hash_unsigned = 3;
1784 es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH);
1788 if (sbi->s_blocks_per_group > blocksize * 8) {
1790 "EXT3-fs: #blocks per group too big: %lu\n",
1791 sbi->s_blocks_per_group);
1794 if (sbi->s_frags_per_group > blocksize * 8) {
1796 "EXT3-fs: #fragments per group too big: %lu\n",
1797 sbi->s_frags_per_group);
1800 if (sbi->s_inodes_per_group > blocksize * 8) {
1802 "EXT3-fs: #inodes per group too big: %lu\n",
1803 sbi->s_inodes_per_group);
1807 if (le32_to_cpu(es->s_blocks_count) >
1808 (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) {
1809 printk(KERN_ERR "EXT3-fs: filesystem on %s:"
1810 " too large to mount safely\n", sb->s_id);
1811 if (sizeof(sector_t) < 8)
1812 printk(KERN_WARNING "EXT3-fs: CONFIG_LBD not "
1817 if (EXT3_BLOCKS_PER_GROUP(sb) == 0)
1819 sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
1820 le32_to_cpu(es->s_first_data_block) - 1)
1821 / EXT3_BLOCKS_PER_GROUP(sb)) + 1;
1822 db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) /
1823 EXT3_DESC_PER_BLOCK(sb);
1824 sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
1826 if (sbi->s_group_desc == NULL) {
1827 printk (KERN_ERR "EXT3-fs: not enough memory\n");
1831 bgl_lock_init(sbi->s_blockgroup_lock);
1833 for (i = 0; i < db_count; i++) {
1834 block = descriptor_loc(sb, logic_sb_block, i);
1835 sbi->s_group_desc[i] = sb_bread(sb, block);
1836 if (!sbi->s_group_desc[i]) {
1837 printk (KERN_ERR "EXT3-fs: "
1838 "can't read group descriptor %d\n", i);
1843 if (!ext3_check_descriptors (sb)) {
1844 printk(KERN_ERR "EXT3-fs: group descriptors corrupted!\n");
1847 sbi->s_gdb_count = db_count;
1848 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1849 spin_lock_init(&sbi->s_next_gen_lock);
1851 err = percpu_counter_init(&sbi->s_freeblocks_counter,
1852 ext3_count_free_blocks(sb));
1854 err = percpu_counter_init(&sbi->s_freeinodes_counter,
1855 ext3_count_free_inodes(sb));
1858 err = percpu_counter_init(&sbi->s_dirs_counter,
1859 ext3_count_dirs(sb));
1862 printk(KERN_ERR "EXT3-fs: insufficient memory\n");
1866 /* per fileystem reservation list head & lock */
1867 spin_lock_init(&sbi->s_rsv_window_lock);
1868 sbi->s_rsv_window_root = RB_ROOT;
1869 /* Add a single, static dummy reservation to the start of the
1870 * reservation window list --- it gives us a placeholder for
1871 * append-at-start-of-list which makes the allocation logic
1872 * _much_ simpler. */
1873 sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1874 sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1875 sbi->s_rsv_window_head.rsv_alloc_hit = 0;
1876 sbi->s_rsv_window_head.rsv_goal_size = 0;
1877 ext3_rsv_window_add(sb, &sbi->s_rsv_window_head);
1880 * set up enough so that it can read an inode
1882 sb->s_op = &ext3_sops;
1883 sb->s_export_op = &ext3_export_ops;
1884 sb->s_xattr = ext3_xattr_handlers;
1886 sb->s_qcop = &ext3_qctl_operations;
1887 sb->dq_op = &ext3_quota_operations;
1889 INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
1893 needs_recovery = (es->s_last_orphan != 0 ||
1894 EXT3_HAS_INCOMPAT_FEATURE(sb,
1895 EXT3_FEATURE_INCOMPAT_RECOVER));
1898 * The first inode we look at is the journal inode. Don't try
1899 * root first: it may be modified in the journal!
1901 if (!test_opt(sb, NOLOAD) &&
1902 EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1903 if (ext3_load_journal(sb, es, journal_devnum))
1905 } else if (journal_inum) {
1906 if (ext3_create_journal(sb, es, journal_inum))
1911 "ext3: No journal on filesystem on %s\n",
1916 /* We have now updated the journal if required, so we can
1917 * validate the data journaling mode. */
1918 switch (test_opt(sb, DATA_FLAGS)) {
1920 /* No mode set, assume a default based on the journal
1921 capabilities: ORDERED_DATA if the journal can
1922 cope, else JOURNAL_DATA */
1923 if (journal_check_available_features
1924 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE))
1925 set_opt(sbi->s_mount_opt, DEFAULT_DATA_MODE);
1927 set_opt(sbi->s_mount_opt, JOURNAL_DATA);
1930 case EXT3_MOUNT_ORDERED_DATA:
1931 case EXT3_MOUNT_WRITEBACK_DATA:
1932 if (!journal_check_available_features
1933 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) {
1934 printk(KERN_ERR "EXT3-fs: Journal does not support "
1935 "requested data journaling mode\n");
1942 if (test_opt(sb, NOBH)) {
1943 if (!(test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)) {
1944 printk(KERN_WARNING "EXT3-fs: Ignoring nobh option - "
1945 "its supported only with writeback mode\n");
1946 clear_opt(sbi->s_mount_opt, NOBH);
1950 * The journal_load will have done any necessary log recovery,
1951 * so we can safely mount the rest of the filesystem now.
1954 root = ext3_iget(sb, EXT3_ROOT_INO);
1956 printk(KERN_ERR "EXT3-fs: get root inode failed\n");
1957 ret = PTR_ERR(root);
1960 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
1962 printk(KERN_ERR "EXT3-fs: corrupt root inode, run e2fsck\n");
1965 sb->s_root = d_alloc_root(root);
1967 printk(KERN_ERR "EXT3-fs: get root dentry failed\n");
1973 ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
1975 * akpm: core read_super() calls in here with the superblock locked.
1976 * That deadlocks, because orphan cleanup needs to lock the superblock
1977 * in numerous places. Here we just pop the lock - it's relatively
1978 * harmless, because we are now ready to accept write_super() requests,
1979 * and aviro says that's the only reason for hanging onto the
1982 EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS;
1983 ext3_orphan_cleanup(sb, es);
1984 EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS;
1986 printk (KERN_INFO "EXT3-fs: recovery complete.\n");
1987 ext3_mark_recovery_complete(sb, es);
1988 printk (KERN_INFO "EXT3-fs: mounted filesystem with %s data mode.\n",
1989 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal":
1990 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered":
1998 printk(KERN_ERR "VFS: Can't find ext3 filesystem on dev %s.\n",
2003 journal_destroy(sbi->s_journal);
2005 percpu_counter_destroy(&sbi->s_freeblocks_counter);
2006 percpu_counter_destroy(&sbi->s_freeinodes_counter);
2007 percpu_counter_destroy(&sbi->s_dirs_counter);
2009 for (i = 0; i < db_count; i++)
2010 brelse(sbi->s_group_desc[i]);
2011 kfree(sbi->s_group_desc);
2014 for (i = 0; i < MAXQUOTAS; i++)
2015 kfree(sbi->s_qf_names[i]);
2017 ext3_blkdev_remove(sbi);
2020 sb->s_fs_info = NULL;
2021 kfree(sbi->s_blockgroup_lock);
2028 * Setup any per-fs journal parameters now. We'll do this both on
2029 * initial mount, once the journal has been initialised but before we've
2030 * done any recovery; and again on any subsequent remount.
2032 static void ext3_init_journal_params(struct super_block *sb, journal_t *journal)
2034 struct ext3_sb_info *sbi = EXT3_SB(sb);
2036 if (sbi->s_commit_interval)
2037 journal->j_commit_interval = sbi->s_commit_interval;
2038 /* We could also set up an ext3-specific default for the commit
2039 * interval here, but for now we'll just fall back to the jbd
2042 spin_lock(&journal->j_state_lock);
2043 if (test_opt(sb, BARRIER))
2044 journal->j_flags |= JFS_BARRIER;
2046 journal->j_flags &= ~JFS_BARRIER;
2047 if (test_opt(sb, DATA_ERR_ABORT))
2048 journal->j_flags |= JFS_ABORT_ON_SYNCDATA_ERR;
2050 journal->j_flags &= ~JFS_ABORT_ON_SYNCDATA_ERR;
2051 spin_unlock(&journal->j_state_lock);
2054 static journal_t *ext3_get_journal(struct super_block *sb,
2055 unsigned int journal_inum)
2057 struct inode *journal_inode;
2060 /* First, test for the existence of a valid inode on disk. Bad
2061 * things happen if we iget() an unused inode, as the subsequent
2062 * iput() will try to delete it. */
2064 journal_inode = ext3_iget(sb, journal_inum);
2065 if (IS_ERR(journal_inode)) {
2066 printk(KERN_ERR "EXT3-fs: no journal found.\n");
2069 if (!journal_inode->i_nlink) {
2070 make_bad_inode(journal_inode);
2071 iput(journal_inode);
2072 printk(KERN_ERR "EXT3-fs: journal inode is deleted.\n");
2076 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2077 journal_inode, journal_inode->i_size);
2078 if (!S_ISREG(journal_inode->i_mode)) {
2079 printk(KERN_ERR "EXT3-fs: invalid journal inode.\n");
2080 iput(journal_inode);
2084 journal = journal_init_inode(journal_inode);
2086 printk(KERN_ERR "EXT3-fs: Could not load journal inode\n");
2087 iput(journal_inode);
2090 journal->j_private = sb;
2091 ext3_init_journal_params(sb, journal);
2095 static journal_t *ext3_get_dev_journal(struct super_block *sb,
2098 struct buffer_head * bh;
2102 int hblock, blocksize;
2103 ext3_fsblk_t sb_block;
2104 unsigned long offset;
2105 struct ext3_super_block * es;
2106 struct block_device *bdev;
2108 bdev = ext3_blkdev_get(j_dev);
2112 if (bd_claim(bdev, sb)) {
2114 "EXT3: failed to claim external journal device.\n");
2115 blkdev_put(bdev, FMODE_READ|FMODE_WRITE);
2119 blocksize = sb->s_blocksize;
2120 hblock = bdev_logical_block_size(bdev);
2121 if (blocksize < hblock) {
2123 "EXT3-fs: blocksize too small for journal device.\n");
2127 sb_block = EXT3_MIN_BLOCK_SIZE / blocksize;
2128 offset = EXT3_MIN_BLOCK_SIZE % blocksize;
2129 set_blocksize(bdev, blocksize);
2130 if (!(bh = __bread(bdev, sb_block, blocksize))) {
2131 printk(KERN_ERR "EXT3-fs: couldn't read superblock of "
2132 "external journal\n");
2136 es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
2137 if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) ||
2138 !(le32_to_cpu(es->s_feature_incompat) &
2139 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
2140 printk(KERN_ERR "EXT3-fs: external journal has "
2141 "bad superblock\n");
2146 if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
2147 printk(KERN_ERR "EXT3-fs: journal UUID does not match\n");
2152 len = le32_to_cpu(es->s_blocks_count);
2153 start = sb_block + 1;
2154 brelse(bh); /* we're done with the superblock */
2156 journal = journal_init_dev(bdev, sb->s_bdev,
2157 start, len, blocksize);
2159 printk(KERN_ERR "EXT3-fs: failed to create device journal\n");
2162 journal->j_private = sb;
2163 ll_rw_block(READ, 1, &journal->j_sb_buffer);
2164 wait_on_buffer(journal->j_sb_buffer);
2165 if (!buffer_uptodate(journal->j_sb_buffer)) {
2166 printk(KERN_ERR "EXT3-fs: I/O error on journal device\n");
2169 if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {
2170 printk(KERN_ERR "EXT3-fs: External journal has more than one "
2171 "user (unsupported) - %d\n",
2172 be32_to_cpu(journal->j_superblock->s_nr_users));
2175 EXT3_SB(sb)->journal_bdev = bdev;
2176 ext3_init_journal_params(sb, journal);
2179 journal_destroy(journal);
2181 ext3_blkdev_put(bdev);
2185 static int ext3_load_journal(struct super_block *sb,
2186 struct ext3_super_block *es,
2187 unsigned long journal_devnum)
2190 unsigned int journal_inum = le32_to_cpu(es->s_journal_inum);
2193 int really_read_only;
2195 if (journal_devnum &&
2196 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2197 printk(KERN_INFO "EXT3-fs: external journal device major/minor "
2198 "numbers have changed\n");
2199 journal_dev = new_decode_dev(journal_devnum);
2201 journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));
2203 really_read_only = bdev_read_only(sb->s_bdev);
2206 * Are we loading a blank journal or performing recovery after a
2207 * crash? For recovery, we need to check in advance whether we
2208 * can get read-write access to the device.
2211 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) {
2212 if (sb->s_flags & MS_RDONLY) {
2213 printk(KERN_INFO "EXT3-fs: INFO: recovery "
2214 "required on readonly filesystem.\n");
2215 if (really_read_only) {
2216 printk(KERN_ERR "EXT3-fs: write access "
2217 "unavailable, cannot proceed.\n");
2220 printk (KERN_INFO "EXT3-fs: write access will "
2221 "be enabled during recovery.\n");
2225 if (journal_inum && journal_dev) {
2226 printk(KERN_ERR "EXT3-fs: filesystem has both journal "
2227 "and inode journals!\n");
2232 if (!(journal = ext3_get_journal(sb, journal_inum)))
2235 if (!(journal = ext3_get_dev_journal(sb, journal_dev)))
2239 if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) {
2240 err = journal_update_format(journal);
2242 printk(KERN_ERR "EXT3-fs: error updating journal.\n");
2243 journal_destroy(journal);
2248 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER))
2249 err = journal_wipe(journal, !really_read_only);
2251 err = journal_load(journal);
2254 printk(KERN_ERR "EXT3-fs: error loading journal.\n");
2255 journal_destroy(journal);
2259 EXT3_SB(sb)->s_journal = journal;
2260 ext3_clear_journal_err(sb, es);
2262 if (journal_devnum &&
2263 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2264 es->s_journal_dev = cpu_to_le32(journal_devnum);
2266 /* Make sure we flush the recovery flag to disk. */
2267 ext3_commit_super(sb, es, 1);
2273 static int ext3_create_journal(struct super_block * sb,
2274 struct ext3_super_block * es,
2275 unsigned int journal_inum)
2280 if (sb->s_flags & MS_RDONLY) {
2281 printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to "
2282 "create journal.\n");
2286 journal = ext3_get_journal(sb, journal_inum);
2290 printk(KERN_INFO "EXT3-fs: creating new journal on inode %u\n",
2293 err = journal_create(journal);
2295 printk(KERN_ERR "EXT3-fs: error creating journal.\n");
2296 journal_destroy(journal);
2300 EXT3_SB(sb)->s_journal = journal;
2302 ext3_update_dynamic_rev(sb);
2303 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2304 EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL);
2306 es->s_journal_inum = cpu_to_le32(journal_inum);
2308 /* Make sure we flush the recovery flag to disk. */
2309 ext3_commit_super(sb, es, 1);
2314 static int ext3_commit_super(struct super_block *sb,
2315 struct ext3_super_block *es,
2318 struct buffer_head *sbh = EXT3_SB(sb)->s_sbh;
2323 es->s_wtime = cpu_to_le32(get_seconds());
2324 es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb));
2325 es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb));
2326 BUFFER_TRACE(sbh, "marking dirty");
2327 mark_buffer_dirty(sbh);
2329 error = sync_dirty_buffer(sbh);
2335 * Have we just finished recovery? If so, and if we are mounting (or
2336 * remounting) the filesystem readonly, then we will end up with a
2337 * consistent fs on disk. Record that fact.
2339 static void ext3_mark_recovery_complete(struct super_block * sb,
2340 struct ext3_super_block * es)
2342 journal_t *journal = EXT3_SB(sb)->s_journal;
2344 journal_lock_updates(journal);
2345 if (journal_flush(journal) < 0)
2349 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) &&
2350 sb->s_flags & MS_RDONLY) {
2351 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2352 ext3_commit_super(sb, es, 1);
2357 journal_unlock_updates(journal);
2361 * If we are mounting (or read-write remounting) a filesystem whose journal
2362 * has recorded an error from a previous lifetime, move that error to the
2363 * main filesystem now.
2365 static void ext3_clear_journal_err(struct super_block * sb,
2366 struct ext3_super_block * es)
2372 journal = EXT3_SB(sb)->s_journal;
2375 * Now check for any error status which may have been recorded in the
2376 * journal by a prior ext3_error() or ext3_abort()
2379 j_errno = journal_errno(journal);
2383 errstr = ext3_decode_error(sb, j_errno, nbuf);
2384 ext3_warning(sb, __func__, "Filesystem error recorded "
2385 "from previous mount: %s", errstr);
2386 ext3_warning(sb, __func__, "Marking fs in need of "
2387 "filesystem check.");
2389 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
2390 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
2391 ext3_commit_super (sb, es, 1);
2393 journal_clear_err(journal);
2398 * Force the running and committing transactions to commit,
2399 * and wait on the commit.
2401 int ext3_force_commit(struct super_block *sb)
2406 if (sb->s_flags & MS_RDONLY)
2409 journal = EXT3_SB(sb)->s_journal;
2410 ret = ext3_journal_force_commit(journal);
2414 static int ext3_sync_fs(struct super_block *sb, int wait)
2418 if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) {
2420 log_wait_commit(EXT3_SB(sb)->s_journal, target);
2426 * LVM calls this function before a (read-only) snapshot is created. This
2427 * gives us a chance to flush the journal completely and mark the fs clean.
2429 static int ext3_freeze(struct super_block *sb)
2434 if (!(sb->s_flags & MS_RDONLY)) {
2435 journal = EXT3_SB(sb)->s_journal;
2437 /* Now we set up the journal barrier. */
2438 journal_lock_updates(journal);
2441 * We don't want to clear needs_recovery flag when we failed
2442 * to flush the journal.
2444 error = journal_flush(journal);
2448 /* Journal blocked and flushed, clear needs_recovery flag. */
2449 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2450 error = ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2457 journal_unlock_updates(journal);
2462 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2463 * flag here, even though the filesystem is not technically dirty yet.
2465 static int ext3_unfreeze(struct super_block *sb)
2467 if (!(sb->s_flags & MS_RDONLY)) {
2469 /* Reser the needs_recovery flag before the fs is unlocked. */
2470 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2471 ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2473 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2478 static int ext3_remount (struct super_block * sb, int * flags, char * data)
2480 struct ext3_super_block * es;
2481 struct ext3_sb_info *sbi = EXT3_SB(sb);
2482 ext3_fsblk_t n_blocks_count = 0;
2483 unsigned long old_sb_flags;
2484 struct ext3_mount_options old_opts;
2490 /* Store the original options */
2491 old_sb_flags = sb->s_flags;
2492 old_opts.s_mount_opt = sbi->s_mount_opt;
2493 old_opts.s_resuid = sbi->s_resuid;
2494 old_opts.s_resgid = sbi->s_resgid;
2495 old_opts.s_commit_interval = sbi->s_commit_interval;
2497 old_opts.s_jquota_fmt = sbi->s_jquota_fmt;
2498 for (i = 0; i < MAXQUOTAS; i++)
2499 old_opts.s_qf_names[i] = sbi->s_qf_names[i];
2503 * Allow the "check" option to be passed as a remount option.
2505 if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) {
2510 if (sbi->s_mount_opt & EXT3_MOUNT_ABORT)
2511 ext3_abort(sb, __func__, "Abort forced by user");
2513 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
2514 ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
2518 ext3_init_journal_params(sb, sbi->s_journal);
2520 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) ||
2521 n_blocks_count > le32_to_cpu(es->s_blocks_count)) {
2522 if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) {
2527 if (*flags & MS_RDONLY) {
2529 * First of all, the unconditional stuff we have to do
2530 * to disable replay of the journal when we next remount
2532 sb->s_flags |= MS_RDONLY;
2535 * OK, test if we are remounting a valid rw partition
2536 * readonly, and if so set the rdonly flag and then
2537 * mark the partition as valid again.
2539 if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) &&
2540 (sbi->s_mount_state & EXT3_VALID_FS))
2541 es->s_state = cpu_to_le16(sbi->s_mount_state);
2544 * We have to unlock super so that we can wait for
2548 ext3_mark_recovery_complete(sb, es);
2552 if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb,
2553 ~EXT3_FEATURE_RO_COMPAT_SUPP))) {
2554 printk(KERN_WARNING "EXT3-fs: %s: couldn't "
2555 "remount RDWR because of unsupported "
2556 "optional features (%x).\n",
2557 sb->s_id, le32_to_cpu(ret));
2563 * If we have an unprocessed orphan list hanging
2564 * around from a previously readonly bdev mount,
2565 * require a full umount/remount for now.
2567 if (es->s_last_orphan) {
2568 printk(KERN_WARNING "EXT3-fs: %s: couldn't "
2569 "remount RDWR because of unprocessed "
2570 "orphan inode list. Please "
2571 "umount/remount instead.\n",
2578 * Mounting a RDONLY partition read-write, so reread
2579 * and store the current valid flag. (It may have
2580 * been changed by e2fsck since we originally mounted
2583 ext3_clear_journal_err(sb, es);
2584 sbi->s_mount_state = le16_to_cpu(es->s_state);
2585 if ((err = ext3_group_extend(sb, es, n_blocks_count)))
2587 if (!ext3_setup_super (sb, es, 0))
2588 sb->s_flags &= ~MS_RDONLY;
2592 /* Release old quota file names */
2593 for (i = 0; i < MAXQUOTAS; i++)
2594 if (old_opts.s_qf_names[i] &&
2595 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2596 kfree(old_opts.s_qf_names[i]);
2600 sb->s_flags = old_sb_flags;
2601 sbi->s_mount_opt = old_opts.s_mount_opt;
2602 sbi->s_resuid = old_opts.s_resuid;
2603 sbi->s_resgid = old_opts.s_resgid;
2604 sbi->s_commit_interval = old_opts.s_commit_interval;
2606 sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
2607 for (i = 0; i < MAXQUOTAS; i++) {
2608 if (sbi->s_qf_names[i] &&
2609 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2610 kfree(sbi->s_qf_names[i]);
2611 sbi->s_qf_names[i] = old_opts.s_qf_names[i];
2617 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
2619 struct super_block *sb = dentry->d_sb;
2620 struct ext3_sb_info *sbi = EXT3_SB(sb);
2621 struct ext3_super_block *es = sbi->s_es;
2624 if (test_opt(sb, MINIX_DF)) {
2625 sbi->s_overhead_last = 0;
2626 } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
2627 unsigned long ngroups = sbi->s_groups_count, i;
2628 ext3_fsblk_t overhead = 0;
2632 * Compute the overhead (FS structures). This is constant
2633 * for a given filesystem unless the number of block groups
2634 * changes so we cache the previous value until it does.
2638 * All of the blocks before first_data_block are
2641 overhead = le32_to_cpu(es->s_first_data_block);
2644 * Add the overhead attributed to the superblock and
2645 * block group descriptors. If the sparse superblocks
2646 * feature is turned on, then not all groups have this.
2648 for (i = 0; i < ngroups; i++) {
2649 overhead += ext3_bg_has_super(sb, i) +
2650 ext3_bg_num_gdb(sb, i);
2655 * Every block group has an inode bitmap, a block
2656 * bitmap, and an inode table.
2658 overhead += ngroups * (2 + sbi->s_itb_per_group);
2659 sbi->s_overhead_last = overhead;
2661 sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
2664 buf->f_type = EXT3_SUPER_MAGIC;
2665 buf->f_bsize = sb->s_blocksize;
2666 buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last;
2667 buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter);
2668 es->s_free_blocks_count = cpu_to_le32(buf->f_bfree);
2669 buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
2670 if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
2672 buf->f_files = le32_to_cpu(es->s_inodes_count);
2673 buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);
2674 es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
2675 buf->f_namelen = EXT3_NAME_LEN;
2676 fsid = le64_to_cpup((void *)es->s_uuid) ^
2677 le64_to_cpup((void *)es->s_uuid + sizeof(u64));
2678 buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
2679 buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
2683 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2684 * is locked for write. Otherwise the are possible deadlocks:
2685 * Process 1 Process 2
2686 * ext3_create() quota_sync()
2687 * journal_start() write_dquot()
2688 * vfs_dq_init() down(dqio_mutex)
2689 * down(dqio_mutex) journal_start()
2695 static inline struct inode *dquot_to_inode(struct dquot *dquot)
2697 return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
2700 static int ext3_write_dquot(struct dquot *dquot)
2704 struct inode *inode;
2706 inode = dquot_to_inode(dquot);
2707 handle = ext3_journal_start(inode,
2708 EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2710 return PTR_ERR(handle);
2711 ret = dquot_commit(dquot);
2712 err = ext3_journal_stop(handle);
2718 static int ext3_acquire_dquot(struct dquot *dquot)
2723 handle = ext3_journal_start(dquot_to_inode(dquot),
2724 EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2726 return PTR_ERR(handle);
2727 ret = dquot_acquire(dquot);
2728 err = ext3_journal_stop(handle);
2734 static int ext3_release_dquot(struct dquot *dquot)
2739 handle = ext3_journal_start(dquot_to_inode(dquot),
2740 EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2741 if (IS_ERR(handle)) {
2742 /* Release dquot anyway to avoid endless cycle in dqput() */
2743 dquot_release(dquot);
2744 return PTR_ERR(handle);
2746 ret = dquot_release(dquot);
2747 err = ext3_journal_stop(handle);
2753 static int ext3_mark_dquot_dirty(struct dquot *dquot)
2755 /* Are we journaling quotas? */
2756 if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2757 EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2758 dquot_mark_dquot_dirty(dquot);
2759 return ext3_write_dquot(dquot);
2761 return dquot_mark_dquot_dirty(dquot);
2765 static int ext3_write_info(struct super_block *sb, int type)
2770 /* Data block + inode block */
2771 handle = ext3_journal_start(sb->s_root->d_inode, 2);
2773 return PTR_ERR(handle);
2774 ret = dquot_commit_info(sb, type);
2775 err = ext3_journal_stop(handle);
2782 * Turn on quotas during mount time - we need to find
2783 * the quota file and such...
2785 static int ext3_quota_on_mount(struct super_block *sb, int type)
2787 return vfs_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type],
2788 EXT3_SB(sb)->s_jquota_fmt, type);
2792 * Standard function to be called on quota_on
2794 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
2795 char *name, int remount)
2800 if (!test_opt(sb, QUOTA))
2802 /* When remounting, no checks are needed and in fact, name is NULL */
2804 return vfs_quota_on(sb, type, format_id, name, remount);
2806 err = kern_path(name, LOOKUP_FOLLOW, &path);
2810 /* Quotafile not on the same filesystem? */
2811 if (path.mnt->mnt_sb != sb) {
2815 /* Journaling quota? */
2816 if (EXT3_SB(sb)->s_qf_names[type]) {
2817 /* Quotafile not of fs root? */
2818 if (path.dentry->d_parent != sb->s_root)
2820 "EXT3-fs: Quota file not on filesystem root. "
2821 "Journaled quota will not work.\n");
2825 * When we journal data on quota file, we have to flush journal to see
2826 * all updates to the file when we bypass pagecache...
2828 if (ext3_should_journal_data(path.dentry->d_inode)) {
2830 * We don't need to lock updates but journal_flush() could
2831 * otherwise be livelocked...
2833 journal_lock_updates(EXT3_SB(sb)->s_journal);
2834 err = journal_flush(EXT3_SB(sb)->s_journal);
2835 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2842 err = vfs_quota_on_path(sb, type, format_id, &path);
2847 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2848 * acquiring the locks... As quota files are never truncated and quota code
2849 * itself serializes the operations (and noone else should touch the files)
2850 * we don't have to be afraid of races */
2851 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
2852 size_t len, loff_t off)
2854 struct inode *inode = sb_dqopt(sb)->files[type];
2855 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2857 int offset = off & (sb->s_blocksize - 1);
2860 struct buffer_head *bh;
2861 loff_t i_size = i_size_read(inode);
2865 if (off+len > i_size)
2868 while (toread > 0) {
2869 tocopy = sb->s_blocksize - offset < toread ?
2870 sb->s_blocksize - offset : toread;
2871 bh = ext3_bread(NULL, inode, blk, 0, &err);
2874 if (!bh) /* A hole? */
2875 memset(data, 0, tocopy);
2877 memcpy(data, bh->b_data+offset, tocopy);
2887 /* Write to quotafile (we know the transaction is already started and has
2888 * enough credits) */
2889 static ssize_t ext3_quota_write(struct super_block *sb, int type,
2890 const char *data, size_t len, loff_t off)
2892 struct inode *inode = sb_dqopt(sb)->files[type];
2893 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2895 int offset = off & (sb->s_blocksize - 1);
2897 int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL;
2898 size_t towrite = len;
2899 struct buffer_head *bh;
2900 handle_t *handle = journal_current_handle();
2903 printk(KERN_WARNING "EXT3-fs: Quota write (off=%Lu, len=%Lu)"
2904 " cancelled because transaction is not started.\n",
2905 (unsigned long long)off, (unsigned long long)len);
2908 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2909 while (towrite > 0) {
2910 tocopy = sb->s_blocksize - offset < towrite ?
2911 sb->s_blocksize - offset : towrite;
2912 bh = ext3_bread(handle, inode, blk, 1, &err);
2915 if (journal_quota) {
2916 err = ext3_journal_get_write_access(handle, bh);
2923 memcpy(bh->b_data+offset, data, tocopy);
2924 flush_dcache_page(bh->b_page);
2927 err = ext3_journal_dirty_metadata(handle, bh);
2929 /* Always do at least ordered writes for quotas */
2930 err = ext3_journal_dirty_data(handle, bh);
2931 mark_buffer_dirty(bh);
2942 if (len == towrite) {
2943 mutex_unlock(&inode->i_mutex);
2946 if (inode->i_size < off+len-towrite) {
2947 i_size_write(inode, off+len-towrite);
2948 EXT3_I(inode)->i_disksize = inode->i_size;
2951 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2952 ext3_mark_inode_dirty(handle, inode);
2953 mutex_unlock(&inode->i_mutex);
2954 return len - towrite;
2959 static int ext3_get_sb(struct file_system_type *fs_type,
2960 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
2962 return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super, mnt);
2965 static struct file_system_type ext3_fs_type = {
2966 .owner = THIS_MODULE,
2968 .get_sb = ext3_get_sb,
2969 .kill_sb = kill_block_super,
2970 .fs_flags = FS_REQUIRES_DEV,
2973 static int __init init_ext3_fs(void)
2975 int err = init_ext3_xattr();
2978 err = init_inodecache();
2981 err = register_filesystem(&ext3_fs_type);
2986 destroy_inodecache();
2992 static void __exit exit_ext3_fs(void)
2994 unregister_filesystem(&ext3_fs_type);
2995 destroy_inodecache();
2999 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3000 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3001 MODULE_LICENSE("GPL");
3002 module_init(init_ext3_fs)
3003 module_exit(exit_ext3_fs)