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 void ext3_write_super (struct super_block * sb);
71 static int ext3_freeze(struct super_block *sb);
74 * Wrappers for journal_start/end.
76 * The only special thing we need to do here is to make sure that all
77 * journal_end calls result in the superblock being marked dirty, so
78 * that sync() will call the filesystem's write_super callback if
81 handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
85 if (sb->s_flags & MS_RDONLY)
86 return ERR_PTR(-EROFS);
88 /* Special case here: if the journal has aborted behind our
89 * backs (eg. EIO in the commit thread), then we still need to
90 * take the FS itself readonly cleanly. */
91 journal = EXT3_SB(sb)->s_journal;
92 if (is_journal_aborted(journal)) {
93 ext3_abort(sb, __func__,
94 "Detected aborted journal");
95 return ERR_PTR(-EROFS);
98 return journal_start(journal, nblocks);
102 * The only special thing we need to do here is to make sure that all
103 * journal_stop calls result in the superblock being marked dirty, so
104 * that sync() will call the filesystem's write_super callback if
107 int __ext3_journal_stop(const char *where, handle_t *handle)
109 struct super_block *sb;
113 sb = handle->h_transaction->t_journal->j_private;
115 rc = journal_stop(handle);
120 __ext3_std_error(sb, where, err);
124 void ext3_journal_abort_handle(const char *caller, const char *err_fn,
125 struct buffer_head *bh, handle_t *handle, int err)
128 const char *errstr = ext3_decode_error(NULL, err, nbuf);
131 BUFFER_TRACE(bh, "abort");
136 if (is_handle_aborted(handle))
139 printk(KERN_ERR "%s: aborting transaction: %s in %s\n",
140 caller, errstr, err_fn);
142 journal_abort_handle(handle);
145 /* Deal with the reporting of failure conditions on a filesystem such as
146 * inconsistencies detected or read IO failures.
148 * On ext2, we can store the error state of the filesystem in the
149 * superblock. That is not possible on ext3, because we may have other
150 * write ordering constraints on the superblock which prevent us from
151 * writing it out straight away; and given that the journal is about to
152 * be aborted, we can't rely on the current, or future, transactions to
153 * write out the superblock safely.
155 * We'll just use the journal_abort() error code to record an error in
156 * the journal instead. On recovery, the journal will compain about
157 * that error until we've noted it down and cleared it.
160 static void ext3_handle_error(struct super_block *sb)
162 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
164 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
165 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
167 if (sb->s_flags & MS_RDONLY)
170 if (!test_opt (sb, ERRORS_CONT)) {
171 journal_t *journal = EXT3_SB(sb)->s_journal;
173 EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
175 journal_abort(journal, -EIO);
177 if (test_opt (sb, ERRORS_RO)) {
178 printk (KERN_CRIT "Remounting filesystem read-only\n");
179 sb->s_flags |= MS_RDONLY;
181 ext3_commit_super(sb, es, 1);
182 if (test_opt(sb, ERRORS_PANIC))
183 panic("EXT3-fs (device %s): panic forced after error\n",
187 void ext3_error (struct super_block * sb, const char * function,
188 const char * fmt, ...)
193 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
198 ext3_handle_error(sb);
201 static const char *ext3_decode_error(struct super_block * sb, int errno,
208 errstr = "IO failure";
211 errstr = "Out of memory";
214 if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT)
215 errstr = "Journal has aborted";
217 errstr = "Readonly filesystem";
220 /* If the caller passed in an extra buffer for unknown
221 * errors, textualise them now. Else we just return
224 /* Check for truncated error codes... */
225 if (snprintf(nbuf, 16, "error %d", -errno) >= 0)
234 /* __ext3_std_error decodes expected errors from journaling functions
235 * automatically and invokes the appropriate error response. */
237 void __ext3_std_error (struct super_block * sb, const char * function,
243 /* Special case: if the error is EROFS, and we're not already
244 * inside a transaction, then there's really no point in logging
246 if (errno == -EROFS && journal_current_handle() == NULL &&
247 (sb->s_flags & MS_RDONLY))
250 errstr = ext3_decode_error(sb, errno, nbuf);
251 printk (KERN_CRIT "EXT3-fs error (device %s) in %s: %s\n",
252 sb->s_id, function, errstr);
254 ext3_handle_error(sb);
258 * ext3_abort is a much stronger failure handler than ext3_error. The
259 * abort function may be used to deal with unrecoverable failures such
260 * as journal IO errors or ENOMEM at a critical moment in log management.
262 * We unconditionally force the filesystem into an ABORT|READONLY state,
263 * unless the error response on the fs has been set to panic in which
264 * case we take the easy way out and panic immediately.
267 void ext3_abort (struct super_block * sb, const char * function,
268 const char * fmt, ...)
272 printk (KERN_CRIT "ext3_abort called.\n");
275 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
280 if (test_opt(sb, ERRORS_PANIC))
281 panic("EXT3-fs panic from previous error\n");
283 if (sb->s_flags & MS_RDONLY)
286 printk(KERN_CRIT "Remounting filesystem read-only\n");
287 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
288 sb->s_flags |= MS_RDONLY;
289 EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
290 if (EXT3_SB(sb)->s_journal)
291 journal_abort(EXT3_SB(sb)->s_journal, -EIO);
294 void ext3_warning (struct super_block * sb, const char * function,
295 const char * fmt, ...)
300 printk(KERN_WARNING "EXT3-fs warning (device %s): %s: ",
307 void ext3_update_dynamic_rev(struct super_block *sb)
309 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
311 if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV)
314 ext3_warning(sb, __func__,
315 "updating to rev %d because of new feature flag, "
316 "running e2fsck is recommended",
319 es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO);
320 es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE);
321 es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV);
322 /* leave es->s_feature_*compat flags alone */
323 /* es->s_uuid will be set by e2fsck if empty */
326 * The rest of the superblock fields should be zero, and if not it
327 * means they are likely already in use, so leave them alone. We
328 * can leave it up to e2fsck to clean up any inconsistencies there.
333 * Open the external journal device
335 static struct block_device *ext3_blkdev_get(dev_t dev)
337 struct block_device *bdev;
338 char b[BDEVNAME_SIZE];
340 bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE);
346 printk(KERN_ERR "EXT3: failed to open journal device %s: %ld\n",
347 __bdevname(dev, b), PTR_ERR(bdev));
352 * Release the journal device
354 static int ext3_blkdev_put(struct block_device *bdev)
357 return blkdev_put(bdev, FMODE_READ|FMODE_WRITE);
360 static int ext3_blkdev_remove(struct ext3_sb_info *sbi)
362 struct block_device *bdev;
365 bdev = sbi->journal_bdev;
367 ret = ext3_blkdev_put(bdev);
368 sbi->journal_bdev = NULL;
373 static inline struct inode *orphan_list_entry(struct list_head *l)
375 return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode;
378 static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
382 printk(KERN_ERR "sb orphan head is %d\n",
383 le32_to_cpu(sbi->s_es->s_last_orphan));
385 printk(KERN_ERR "sb_info orphan list:\n");
386 list_for_each(l, &sbi->s_orphan) {
387 struct inode *inode = orphan_list_entry(l);
389 "inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
390 inode->i_sb->s_id, inode->i_ino, inode,
391 inode->i_mode, inode->i_nlink,
396 static void ext3_put_super (struct super_block * sb)
398 struct ext3_sb_info *sbi = EXT3_SB(sb);
399 struct ext3_super_block *es = sbi->s_es;
402 ext3_xattr_put_super(sb);
403 err = journal_destroy(sbi->s_journal);
404 sbi->s_journal = NULL;
406 ext3_abort(sb, __func__, "Couldn't clean up the journal");
408 if (!(sb->s_flags & MS_RDONLY)) {
409 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
410 es->s_state = cpu_to_le16(sbi->s_mount_state);
411 BUFFER_TRACE(sbi->s_sbh, "marking dirty");
412 mark_buffer_dirty(sbi->s_sbh);
413 ext3_commit_super(sb, es, 1);
416 for (i = 0; i < sbi->s_gdb_count; i++)
417 brelse(sbi->s_group_desc[i]);
418 kfree(sbi->s_group_desc);
419 percpu_counter_destroy(&sbi->s_freeblocks_counter);
420 percpu_counter_destroy(&sbi->s_freeinodes_counter);
421 percpu_counter_destroy(&sbi->s_dirs_counter);
424 for (i = 0; i < MAXQUOTAS; i++)
425 kfree(sbi->s_qf_names[i]);
428 /* Debugging code just in case the in-memory inode orphan list
429 * isn't empty. The on-disk one can be non-empty if we've
430 * detected an error and taken the fs readonly, but the
431 * in-memory list had better be clean by this point. */
432 if (!list_empty(&sbi->s_orphan))
433 dump_orphan_list(sb, sbi);
434 J_ASSERT(list_empty(&sbi->s_orphan));
436 invalidate_bdev(sb->s_bdev);
437 if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) {
439 * Invalidate the journal device's buffers. We don't want them
440 * floating about in memory - the physical journal device may
441 * hotswapped, and it breaks the `ro-after' testing code.
443 sync_blockdev(sbi->journal_bdev);
444 invalidate_bdev(sbi->journal_bdev);
445 ext3_blkdev_remove(sbi);
447 sb->s_fs_info = NULL;
448 kfree(sbi->s_blockgroup_lock);
453 static struct kmem_cache *ext3_inode_cachep;
456 * Called inside transaction, so use GFP_NOFS
458 static struct inode *ext3_alloc_inode(struct super_block *sb)
460 struct ext3_inode_info *ei;
462 ei = kmem_cache_alloc(ext3_inode_cachep, GFP_NOFS);
465 #ifdef CONFIG_EXT3_FS_POSIX_ACL
466 ei->i_acl = EXT3_ACL_NOT_CACHED;
467 ei->i_default_acl = EXT3_ACL_NOT_CACHED;
469 ei->i_block_alloc_info = NULL;
470 ei->vfs_inode.i_version = 1;
471 return &ei->vfs_inode;
474 static void ext3_destroy_inode(struct inode *inode)
476 if (!list_empty(&(EXT3_I(inode)->i_orphan))) {
477 printk("EXT3 Inode %p: orphan list check failed!\n",
479 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4,
480 EXT3_I(inode), sizeof(struct ext3_inode_info),
484 kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
487 static void init_once(void *foo)
489 struct ext3_inode_info *ei = (struct ext3_inode_info *) foo;
491 INIT_LIST_HEAD(&ei->i_orphan);
492 #ifdef CONFIG_EXT3_FS_XATTR
493 init_rwsem(&ei->xattr_sem);
495 mutex_init(&ei->truncate_mutex);
496 inode_init_once(&ei->vfs_inode);
499 static int init_inodecache(void)
501 ext3_inode_cachep = kmem_cache_create("ext3_inode_cache",
502 sizeof(struct ext3_inode_info),
503 0, (SLAB_RECLAIM_ACCOUNT|
506 if (ext3_inode_cachep == NULL)
511 static void destroy_inodecache(void)
513 kmem_cache_destroy(ext3_inode_cachep);
516 static void ext3_clear_inode(struct inode *inode)
518 struct ext3_block_alloc_info *rsv = EXT3_I(inode)->i_block_alloc_info;
519 #ifdef CONFIG_EXT3_FS_POSIX_ACL
520 if (EXT3_I(inode)->i_acl &&
521 EXT3_I(inode)->i_acl != EXT3_ACL_NOT_CACHED) {
522 posix_acl_release(EXT3_I(inode)->i_acl);
523 EXT3_I(inode)->i_acl = EXT3_ACL_NOT_CACHED;
525 if (EXT3_I(inode)->i_default_acl &&
526 EXT3_I(inode)->i_default_acl != EXT3_ACL_NOT_CACHED) {
527 posix_acl_release(EXT3_I(inode)->i_default_acl);
528 EXT3_I(inode)->i_default_acl = EXT3_ACL_NOT_CACHED;
531 ext3_discard_reservation(inode);
532 EXT3_I(inode)->i_block_alloc_info = NULL;
537 static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb)
539 #if defined(CONFIG_QUOTA)
540 struct ext3_sb_info *sbi = EXT3_SB(sb);
542 if (sbi->s_jquota_fmt)
543 seq_printf(seq, ",jqfmt=%s",
544 (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0");
546 if (sbi->s_qf_names[USRQUOTA])
547 seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]);
549 if (sbi->s_qf_names[GRPQUOTA])
550 seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]);
552 if (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA)
553 seq_puts(seq, ",usrquota");
555 if (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)
556 seq_puts(seq, ",grpquota");
562 * - it's set to a non-default value OR
563 * - if the per-sb default is different from the global default
565 static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
567 struct super_block *sb = vfs->mnt_sb;
568 struct ext3_sb_info *sbi = EXT3_SB(sb);
569 struct ext3_super_block *es = sbi->s_es;
570 unsigned long def_mount_opts;
572 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
574 if (sbi->s_sb_block != 1)
575 seq_printf(seq, ",sb=%lu", sbi->s_sb_block);
576 if (test_opt(sb, MINIX_DF))
577 seq_puts(seq, ",minixdf");
578 if (test_opt(sb, GRPID))
579 seq_puts(seq, ",grpid");
580 if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS))
581 seq_puts(seq, ",nogrpid");
582 if (sbi->s_resuid != EXT3_DEF_RESUID ||
583 le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) {
584 seq_printf(seq, ",resuid=%u", sbi->s_resuid);
586 if (sbi->s_resgid != EXT3_DEF_RESGID ||
587 le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) {
588 seq_printf(seq, ",resgid=%u", sbi->s_resgid);
590 if (test_opt(sb, ERRORS_RO)) {
591 int def_errors = le16_to_cpu(es->s_errors);
593 if (def_errors == EXT3_ERRORS_PANIC ||
594 def_errors == EXT3_ERRORS_CONTINUE) {
595 seq_puts(seq, ",errors=remount-ro");
598 if (test_opt(sb, ERRORS_CONT))
599 seq_puts(seq, ",errors=continue");
600 if (test_opt(sb, ERRORS_PANIC))
601 seq_puts(seq, ",errors=panic");
602 if (test_opt(sb, NO_UID32))
603 seq_puts(seq, ",nouid32");
604 if (test_opt(sb, DEBUG))
605 seq_puts(seq, ",debug");
606 if (test_opt(sb, OLDALLOC))
607 seq_puts(seq, ",oldalloc");
608 #ifdef CONFIG_EXT3_FS_XATTR
609 if (test_opt(sb, XATTR_USER))
610 seq_puts(seq, ",user_xattr");
611 if (!test_opt(sb, XATTR_USER) &&
612 (def_mount_opts & EXT3_DEFM_XATTR_USER)) {
613 seq_puts(seq, ",nouser_xattr");
616 #ifdef CONFIG_EXT3_FS_POSIX_ACL
617 if (test_opt(sb, POSIX_ACL))
618 seq_puts(seq, ",acl");
619 if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL))
620 seq_puts(seq, ",noacl");
622 if (!test_opt(sb, RESERVATION))
623 seq_puts(seq, ",noreservation");
624 if (sbi->s_commit_interval) {
625 seq_printf(seq, ",commit=%u",
626 (unsigned) (sbi->s_commit_interval / HZ));
628 if (test_opt(sb, BARRIER))
629 seq_puts(seq, ",barrier=1");
630 if (test_opt(sb, NOBH))
631 seq_puts(seq, ",nobh");
633 if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA)
634 seq_puts(seq, ",data=journal");
635 else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA)
636 seq_puts(seq, ",data=ordered");
637 else if (test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)
638 seq_puts(seq, ",data=writeback");
640 if (test_opt(sb, DATA_ERR_ABORT))
641 seq_puts(seq, ",data_err=abort");
643 ext3_show_quota_options(seq, sb);
649 static struct inode *ext3_nfs_get_inode(struct super_block *sb,
650 u64 ino, u32 generation)
654 if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO)
655 return ERR_PTR(-ESTALE);
656 if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count))
657 return ERR_PTR(-ESTALE);
659 /* iget isn't really right if the inode is currently unallocated!!
661 * ext3_read_inode will return a bad_inode if the inode had been
662 * deleted, so we should be safe.
664 * Currently we don't know the generation for parent directory, so
665 * a generation of 0 means "accept any"
667 inode = ext3_iget(sb, ino);
669 return ERR_CAST(inode);
670 if (generation && inode->i_generation != generation) {
672 return ERR_PTR(-ESTALE);
678 static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid,
679 int fh_len, int fh_type)
681 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
685 static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid,
686 int fh_len, int fh_type)
688 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
693 * Try to release metadata pages (indirect blocks, directories) which are
694 * mapped via the block device. Since these pages could have journal heads
695 * which would prevent try_to_free_buffers() from freeing them, we must use
696 * jbd layer's try_to_free_buffers() function to release them.
698 static int bdev_try_to_free_page(struct super_block *sb, struct page *page,
701 journal_t *journal = EXT3_SB(sb)->s_journal;
703 WARN_ON(PageChecked(page));
704 if (!page_has_buffers(page))
707 return journal_try_to_free_buffers(journal, page,
709 return try_to_free_buffers(page);
713 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
714 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
716 static int ext3_write_dquot(struct dquot *dquot);
717 static int ext3_acquire_dquot(struct dquot *dquot);
718 static int ext3_release_dquot(struct dquot *dquot);
719 static int ext3_mark_dquot_dirty(struct dquot *dquot);
720 static int ext3_write_info(struct super_block *sb, int type);
721 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
722 char *path, int remount);
723 static int ext3_quota_on_mount(struct super_block *sb, int type);
724 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
725 size_t len, loff_t off);
726 static ssize_t ext3_quota_write(struct super_block *sb, int type,
727 const char *data, size_t len, loff_t off);
729 static struct dquot_operations ext3_quota_operations = {
730 .initialize = dquot_initialize,
732 .alloc_space = dquot_alloc_space,
733 .alloc_inode = dquot_alloc_inode,
734 .free_space = dquot_free_space,
735 .free_inode = dquot_free_inode,
736 .transfer = dquot_transfer,
737 .write_dquot = ext3_write_dquot,
738 .acquire_dquot = ext3_acquire_dquot,
739 .release_dquot = ext3_release_dquot,
740 .mark_dirty = ext3_mark_dquot_dirty,
741 .write_info = ext3_write_info,
742 .alloc_dquot = dquot_alloc,
743 .destroy_dquot = dquot_destroy,
746 static struct quotactl_ops ext3_qctl_operations = {
747 .quota_on = ext3_quota_on,
748 .quota_off = vfs_quota_off,
749 .quota_sync = vfs_quota_sync,
750 .get_info = vfs_get_dqinfo,
751 .set_info = vfs_set_dqinfo,
752 .get_dqblk = vfs_get_dqblk,
753 .set_dqblk = vfs_set_dqblk
757 static const struct super_operations ext3_sops = {
758 .alloc_inode = ext3_alloc_inode,
759 .destroy_inode = ext3_destroy_inode,
760 .write_inode = ext3_write_inode,
761 .dirty_inode = ext3_dirty_inode,
762 .delete_inode = ext3_delete_inode,
763 .put_super = ext3_put_super,
764 .write_super = ext3_write_super,
765 .sync_fs = ext3_sync_fs,
766 .freeze_fs = ext3_freeze,
767 .unfreeze_fs = ext3_unfreeze,
768 .statfs = ext3_statfs,
769 .remount_fs = ext3_remount,
770 .clear_inode = ext3_clear_inode,
771 .show_options = ext3_show_options,
773 .quota_read = ext3_quota_read,
774 .quota_write = ext3_quota_write,
776 .bdev_try_to_free_page = bdev_try_to_free_page,
779 static const struct export_operations ext3_export_ops = {
780 .fh_to_dentry = ext3_fh_to_dentry,
781 .fh_to_parent = ext3_fh_to_parent,
782 .get_parent = ext3_get_parent,
786 Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
787 Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
788 Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
789 Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
790 Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
791 Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
792 Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
793 Opt_data_err_abort, Opt_data_err_ignore,
794 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
795 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota,
796 Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota,
800 static const match_table_t tokens = {
801 {Opt_bsd_df, "bsddf"},
802 {Opt_minix_df, "minixdf"},
803 {Opt_grpid, "grpid"},
804 {Opt_grpid, "bsdgroups"},
805 {Opt_nogrpid, "nogrpid"},
806 {Opt_nogrpid, "sysvgroups"},
807 {Opt_resgid, "resgid=%u"},
808 {Opt_resuid, "resuid=%u"},
810 {Opt_err_cont, "errors=continue"},
811 {Opt_err_panic, "errors=panic"},
812 {Opt_err_ro, "errors=remount-ro"},
813 {Opt_nouid32, "nouid32"},
814 {Opt_nocheck, "nocheck"},
815 {Opt_nocheck, "check=none"},
816 {Opt_debug, "debug"},
817 {Opt_oldalloc, "oldalloc"},
818 {Opt_orlov, "orlov"},
819 {Opt_user_xattr, "user_xattr"},
820 {Opt_nouser_xattr, "nouser_xattr"},
822 {Opt_noacl, "noacl"},
823 {Opt_reservation, "reservation"},
824 {Opt_noreservation, "noreservation"},
825 {Opt_noload, "noload"},
828 {Opt_commit, "commit=%u"},
829 {Opt_journal_update, "journal=update"},
830 {Opt_journal_inum, "journal=%u"},
831 {Opt_journal_dev, "journal_dev=%u"},
832 {Opt_abort, "abort"},
833 {Opt_data_journal, "data=journal"},
834 {Opt_data_ordered, "data=ordered"},
835 {Opt_data_writeback, "data=writeback"},
836 {Opt_data_err_abort, "data_err=abort"},
837 {Opt_data_err_ignore, "data_err=ignore"},
838 {Opt_offusrjquota, "usrjquota="},
839 {Opt_usrjquota, "usrjquota=%s"},
840 {Opt_offgrpjquota, "grpjquota="},
841 {Opt_grpjquota, "grpjquota=%s"},
842 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
843 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
844 {Opt_grpquota, "grpquota"},
845 {Opt_noquota, "noquota"},
846 {Opt_quota, "quota"},
847 {Opt_usrquota, "usrquota"},
848 {Opt_barrier, "barrier=%u"},
849 {Opt_resize, "resize"},
853 static ext3_fsblk_t get_sb_block(void **data)
855 ext3_fsblk_t sb_block;
856 char *options = (char *) *data;
858 if (!options || strncmp(options, "sb=", 3) != 0)
859 return 1; /* Default location */
861 /*todo: use simple_strtoll with >32bit ext3 */
862 sb_block = simple_strtoul(options, &options, 0);
863 if (*options && *options != ',') {
864 printk("EXT3-fs: Invalid sb specification: %s\n",
870 *data = (void *) options;
874 static int parse_options (char *options, struct super_block *sb,
875 unsigned int *inum, unsigned long *journal_devnum,
876 ext3_fsblk_t *n_blocks_count, int is_remount)
878 struct ext3_sb_info *sbi = EXT3_SB(sb);
880 substring_t args[MAX_OPT_ARGS];
891 while ((p = strsep (&options, ",")) != NULL) {
896 token = match_token(p, tokens, args);
899 clear_opt (sbi->s_mount_opt, MINIX_DF);
902 set_opt (sbi->s_mount_opt, MINIX_DF);
905 set_opt (sbi->s_mount_opt, GRPID);
908 clear_opt (sbi->s_mount_opt, GRPID);
911 if (match_int(&args[0], &option))
913 sbi->s_resuid = option;
916 if (match_int(&args[0], &option))
918 sbi->s_resgid = option;
921 /* handled by get_sb_block() instead of here */
922 /* *sb_block = match_int(&args[0]); */
925 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
926 clear_opt (sbi->s_mount_opt, ERRORS_RO);
927 set_opt (sbi->s_mount_opt, ERRORS_PANIC);
930 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
931 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
932 set_opt (sbi->s_mount_opt, ERRORS_RO);
935 clear_opt (sbi->s_mount_opt, ERRORS_RO);
936 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
937 set_opt (sbi->s_mount_opt, ERRORS_CONT);
940 set_opt (sbi->s_mount_opt, NO_UID32);
943 clear_opt (sbi->s_mount_opt, CHECK);
946 set_opt (sbi->s_mount_opt, DEBUG);
949 set_opt (sbi->s_mount_opt, OLDALLOC);
952 clear_opt (sbi->s_mount_opt, OLDALLOC);
954 #ifdef CONFIG_EXT3_FS_XATTR
956 set_opt (sbi->s_mount_opt, XATTR_USER);
958 case Opt_nouser_xattr:
959 clear_opt (sbi->s_mount_opt, XATTR_USER);
963 case Opt_nouser_xattr:
964 printk("EXT3 (no)user_xattr options not supported\n");
967 #ifdef CONFIG_EXT3_FS_POSIX_ACL
969 set_opt(sbi->s_mount_opt, POSIX_ACL);
972 clear_opt(sbi->s_mount_opt, POSIX_ACL);
977 printk("EXT3 (no)acl options not supported\n");
980 case Opt_reservation:
981 set_opt(sbi->s_mount_opt, RESERVATION);
983 case Opt_noreservation:
984 clear_opt(sbi->s_mount_opt, RESERVATION);
986 case Opt_journal_update:
988 /* Eventually we will want to be able to create
989 a journal file here. For now, only allow the
990 user to specify an existing inode to be the
993 printk(KERN_ERR "EXT3-fs: cannot specify "
994 "journal on remount\n");
997 set_opt (sbi->s_mount_opt, UPDATE_JOURNAL);
999 case Opt_journal_inum:
1001 printk(KERN_ERR "EXT3-fs: cannot specify "
1002 "journal on remount\n");
1005 if (match_int(&args[0], &option))
1009 case Opt_journal_dev:
1011 printk(KERN_ERR "EXT3-fs: cannot specify "
1012 "journal on remount\n");
1015 if (match_int(&args[0], &option))
1017 *journal_devnum = option;
1020 set_opt (sbi->s_mount_opt, NOLOAD);
1023 if (match_int(&args[0], &option))
1028 option = JBD_DEFAULT_MAX_COMMIT_AGE;
1029 sbi->s_commit_interval = HZ * option;
1031 case Opt_data_journal:
1032 data_opt = EXT3_MOUNT_JOURNAL_DATA;
1034 case Opt_data_ordered:
1035 data_opt = EXT3_MOUNT_ORDERED_DATA;
1037 case Opt_data_writeback:
1038 data_opt = EXT3_MOUNT_WRITEBACK_DATA;
1041 if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS)
1044 "EXT3-fs: cannot change data "
1045 "mode on remount\n");
1049 sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS;
1050 sbi->s_mount_opt |= data_opt;
1053 case Opt_data_err_abort:
1054 set_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1056 case Opt_data_err_ignore:
1057 clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1066 if (sb_any_quota_loaded(sb) &&
1067 !sbi->s_qf_names[qtype]) {
1069 "EXT3-fs: Cannot change journaled "
1070 "quota options when quota turned on.\n");
1073 qname = match_strdup(&args[0]);
1076 "EXT3-fs: not enough memory for "
1077 "storing quotafile name.\n");
1080 if (sbi->s_qf_names[qtype] &&
1081 strcmp(sbi->s_qf_names[qtype], qname)) {
1083 "EXT3-fs: %s quota file already "
1084 "specified.\n", QTYPE2NAME(qtype));
1088 sbi->s_qf_names[qtype] = qname;
1089 if (strchr(sbi->s_qf_names[qtype], '/')) {
1091 "EXT3-fs: quotafile must be on "
1092 "filesystem root.\n");
1093 kfree(sbi->s_qf_names[qtype]);
1094 sbi->s_qf_names[qtype] = NULL;
1097 set_opt(sbi->s_mount_opt, QUOTA);
1099 case Opt_offusrjquota:
1102 case Opt_offgrpjquota:
1105 if (sb_any_quota_loaded(sb) &&
1106 sbi->s_qf_names[qtype]) {
1107 printk(KERN_ERR "EXT3-fs: Cannot change "
1108 "journaled quota options when "
1109 "quota turned on.\n");
1113 * The space will be released later when all options
1114 * are confirmed to be correct
1116 sbi->s_qf_names[qtype] = NULL;
1118 case Opt_jqfmt_vfsold:
1119 qfmt = QFMT_VFS_OLD;
1121 case Opt_jqfmt_vfsv0:
1124 if (sb_any_quota_loaded(sb) &&
1125 sbi->s_jquota_fmt != qfmt) {
1126 printk(KERN_ERR "EXT3-fs: Cannot change "
1127 "journaled quota options when "
1128 "quota turned on.\n");
1131 sbi->s_jquota_fmt = qfmt;
1135 set_opt(sbi->s_mount_opt, QUOTA);
1136 set_opt(sbi->s_mount_opt, USRQUOTA);
1139 set_opt(sbi->s_mount_opt, QUOTA);
1140 set_opt(sbi->s_mount_opt, GRPQUOTA);
1143 if (sb_any_quota_loaded(sb)) {
1144 printk(KERN_ERR "EXT3-fs: Cannot change quota "
1145 "options when quota turned on.\n");
1148 clear_opt(sbi->s_mount_opt, QUOTA);
1149 clear_opt(sbi->s_mount_opt, USRQUOTA);
1150 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1157 "EXT3-fs: quota options not supported.\n");
1161 case Opt_offusrjquota:
1162 case Opt_offgrpjquota:
1163 case Opt_jqfmt_vfsold:
1164 case Opt_jqfmt_vfsv0:
1166 "EXT3-fs: journaled quota options not "
1173 set_opt(sbi->s_mount_opt, ABORT);
1176 if (match_int(&args[0], &option))
1179 set_opt(sbi->s_mount_opt, BARRIER);
1181 clear_opt(sbi->s_mount_opt, BARRIER);
1187 printk("EXT3-fs: resize option only available "
1191 if (match_int(&args[0], &option) != 0)
1193 *n_blocks_count = option;
1196 set_opt(sbi->s_mount_opt, NOBH);
1199 clear_opt(sbi->s_mount_opt, NOBH);
1203 "EXT3-fs: Unrecognized mount option \"%s\" "
1204 "or missing value\n", p);
1209 if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
1210 if ((sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA) &&
1211 sbi->s_qf_names[USRQUOTA])
1212 clear_opt(sbi->s_mount_opt, USRQUOTA);
1214 if ((sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA) &&
1215 sbi->s_qf_names[GRPQUOTA])
1216 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1218 if ((sbi->s_qf_names[USRQUOTA] &&
1219 (sbi->s_mount_opt & EXT3_MOUNT_GRPQUOTA)) ||
1220 (sbi->s_qf_names[GRPQUOTA] &&
1221 (sbi->s_mount_opt & EXT3_MOUNT_USRQUOTA))) {
1222 printk(KERN_ERR "EXT3-fs: old and new quota "
1223 "format mixing.\n");
1227 if (!sbi->s_jquota_fmt) {
1228 printk(KERN_ERR "EXT3-fs: journaled quota format "
1229 "not specified.\n");
1233 if (sbi->s_jquota_fmt) {
1234 printk(KERN_ERR "EXT3-fs: journaled quota format "
1235 "specified with no journaling "
1244 static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es,
1247 struct ext3_sb_info *sbi = EXT3_SB(sb);
1250 if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) {
1251 printk (KERN_ERR "EXT3-fs warning: revision level too high, "
1252 "forcing read-only mode\n");
1257 if (!(sbi->s_mount_state & EXT3_VALID_FS))
1258 printk (KERN_WARNING "EXT3-fs warning: mounting unchecked fs, "
1259 "running e2fsck is recommended\n");
1260 else if ((sbi->s_mount_state & EXT3_ERROR_FS))
1261 printk (KERN_WARNING
1262 "EXT3-fs warning: mounting fs with errors, "
1263 "running e2fsck is recommended\n");
1264 else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 &&
1265 le16_to_cpu(es->s_mnt_count) >=
1266 (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))
1267 printk (KERN_WARNING
1268 "EXT3-fs warning: maximal mount count reached, "
1269 "running e2fsck is recommended\n");
1270 else if (le32_to_cpu(es->s_checkinterval) &&
1271 (le32_to_cpu(es->s_lastcheck) +
1272 le32_to_cpu(es->s_checkinterval) <= get_seconds()))
1273 printk (KERN_WARNING
1274 "EXT3-fs warning: checktime reached, "
1275 "running e2fsck is recommended\n");
1277 /* @@@ We _will_ want to clear the valid bit if we find
1278 inconsistencies, to force a fsck at reboot. But for
1279 a plain journaled filesystem we can keep it set as
1280 valid forever! :) */
1281 es->s_state &= cpu_to_le16(~EXT3_VALID_FS);
1283 if (!(__s16) le16_to_cpu(es->s_max_mnt_count))
1284 es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT);
1285 le16_add_cpu(&es->s_mnt_count, 1);
1286 es->s_mtime = cpu_to_le32(get_seconds());
1287 ext3_update_dynamic_rev(sb);
1288 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
1290 ext3_commit_super(sb, es, 1);
1291 if (test_opt(sb, DEBUG))
1292 printk(KERN_INFO "[EXT3 FS bs=%lu, gc=%lu, "
1293 "bpg=%lu, ipg=%lu, mo=%04lx]\n",
1295 sbi->s_groups_count,
1296 EXT3_BLOCKS_PER_GROUP(sb),
1297 EXT3_INODES_PER_GROUP(sb),
1300 printk(KERN_INFO "EXT3 FS on %s, ", sb->s_id);
1301 if (EXT3_SB(sb)->s_journal->j_inode == NULL) {
1302 char b[BDEVNAME_SIZE];
1304 printk("external journal on %s\n",
1305 bdevname(EXT3_SB(sb)->s_journal->j_dev, b));
1307 printk("internal journal\n");
1312 /* Called at mount-time, super-block is locked */
1313 static int ext3_check_descriptors(struct super_block *sb)
1315 struct ext3_sb_info *sbi = EXT3_SB(sb);
1318 ext3_debug ("Checking group descriptors");
1320 for (i = 0; i < sbi->s_groups_count; i++) {
1321 struct ext3_group_desc *gdp = ext3_get_group_desc(sb, i, NULL);
1322 ext3_fsblk_t first_block = ext3_group_first_block_no(sb, i);
1323 ext3_fsblk_t last_block;
1325 if (i == sbi->s_groups_count - 1)
1326 last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
1328 last_block = first_block +
1329 (EXT3_BLOCKS_PER_GROUP(sb) - 1);
1331 if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
1332 le32_to_cpu(gdp->bg_block_bitmap) > last_block)
1334 ext3_error (sb, "ext3_check_descriptors",
1335 "Block bitmap for group %d"
1336 " not in group (block %lu)!",
1338 le32_to_cpu(gdp->bg_block_bitmap));
1341 if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block ||
1342 le32_to_cpu(gdp->bg_inode_bitmap) > last_block)
1344 ext3_error (sb, "ext3_check_descriptors",
1345 "Inode bitmap for group %d"
1346 " not in group (block %lu)!",
1348 le32_to_cpu(gdp->bg_inode_bitmap));
1351 if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
1352 le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 >
1355 ext3_error (sb, "ext3_check_descriptors",
1356 "Inode table for group %d"
1357 " not in group (block %lu)!",
1359 le32_to_cpu(gdp->bg_inode_table));
1364 sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb));
1365 sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb));
1370 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1371 * the superblock) which were deleted from all directories, but held open by
1372 * a process at the time of a crash. We walk the list and try to delete these
1373 * inodes at recovery time (only with a read-write filesystem).
1375 * In order to keep the orphan inode chain consistent during traversal (in
1376 * case of crash during recovery), we link each inode into the superblock
1377 * orphan list_head and handle it the same way as an inode deletion during
1378 * normal operation (which journals the operations for us).
1380 * We only do an iget() and an iput() on each inode, which is very safe if we
1381 * accidentally point at an in-use or already deleted inode. The worst that
1382 * can happen in this case is that we get a "bit already cleared" message from
1383 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1384 * e2fsck was run on this filesystem, and it must have already done the orphan
1385 * inode cleanup for us, so we can safely abort without any further action.
1387 static void ext3_orphan_cleanup (struct super_block * sb,
1388 struct ext3_super_block * es)
1390 unsigned int s_flags = sb->s_flags;
1391 int nr_orphans = 0, nr_truncates = 0;
1395 if (!es->s_last_orphan) {
1396 jbd_debug(4, "no orphan inodes to clean up\n");
1400 if (bdev_read_only(sb->s_bdev)) {
1401 printk(KERN_ERR "EXT3-fs: write access "
1402 "unavailable, skipping orphan cleanup.\n");
1406 if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) {
1407 if (es->s_last_orphan)
1408 jbd_debug(1, "Errors on filesystem, "
1409 "clearing orphan list.\n");
1410 es->s_last_orphan = 0;
1411 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1415 if (s_flags & MS_RDONLY) {
1416 printk(KERN_INFO "EXT3-fs: %s: orphan cleanup on readonly fs\n",
1418 sb->s_flags &= ~MS_RDONLY;
1421 /* Needed for iput() to work correctly and not trash data */
1422 sb->s_flags |= MS_ACTIVE;
1423 /* Turn on quotas so that they are updated correctly */
1424 for (i = 0; i < MAXQUOTAS; i++) {
1425 if (EXT3_SB(sb)->s_qf_names[i]) {
1426 int ret = ext3_quota_on_mount(sb, i);
1429 "EXT3-fs: Cannot turn on journaled "
1430 "quota: error %d\n", ret);
1435 while (es->s_last_orphan) {
1436 struct inode *inode;
1438 inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan));
1439 if (IS_ERR(inode)) {
1440 es->s_last_orphan = 0;
1444 list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan);
1446 if (inode->i_nlink) {
1448 "%s: truncating inode %lu to %Ld bytes\n",
1449 __func__, inode->i_ino, inode->i_size);
1450 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1451 inode->i_ino, inode->i_size);
1452 ext3_truncate(inode);
1456 "%s: deleting unreferenced inode %lu\n",
1457 __func__, inode->i_ino);
1458 jbd_debug(2, "deleting unreferenced inode %lu\n",
1462 iput(inode); /* The delete magic happens here! */
1465 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1468 printk(KERN_INFO "EXT3-fs: %s: %d orphan inode%s deleted\n",
1469 sb->s_id, PLURAL(nr_orphans));
1471 printk(KERN_INFO "EXT3-fs: %s: %d truncate%s cleaned up\n",
1472 sb->s_id, PLURAL(nr_truncates));
1474 /* Turn quotas off */
1475 for (i = 0; i < MAXQUOTAS; i++) {
1476 if (sb_dqopt(sb)->files[i])
1477 vfs_quota_off(sb, i, 0);
1480 sb->s_flags = s_flags; /* Restore MS_RDONLY status */
1484 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1485 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1486 * We need to be 1 filesystem block less than the 2^32 sector limit.
1488 static loff_t ext3_max_size(int bits)
1490 loff_t res = EXT3_NDIR_BLOCKS;
1494 /* This is calculated to be the largest file size for a
1495 * dense, file such that the total number of
1496 * sectors in the file, including data and all indirect blocks,
1497 * does not exceed 2^32 -1
1498 * __u32 i_blocks representing the total number of
1499 * 512 bytes blocks of the file
1501 upper_limit = (1LL << 32) - 1;
1503 /* total blocks in file system block size */
1504 upper_limit >>= (bits - 9);
1507 /* indirect blocks */
1509 /* double indirect blocks */
1510 meta_blocks += 1 + (1LL << (bits-2));
1511 /* tripple indirect blocks */
1512 meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
1514 upper_limit -= meta_blocks;
1515 upper_limit <<= bits;
1517 res += 1LL << (bits-2);
1518 res += 1LL << (2*(bits-2));
1519 res += 1LL << (3*(bits-2));
1521 if (res > upper_limit)
1524 if (res > MAX_LFS_FILESIZE)
1525 res = MAX_LFS_FILESIZE;
1530 static ext3_fsblk_t descriptor_loc(struct super_block *sb,
1531 ext3_fsblk_t logic_sb_block,
1534 struct ext3_sb_info *sbi = EXT3_SB(sb);
1535 unsigned long bg, first_meta_bg;
1538 first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
1540 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) ||
1542 return (logic_sb_block + nr + 1);
1543 bg = sbi->s_desc_per_block * nr;
1544 if (ext3_bg_has_super(sb, bg))
1546 return (has_super + ext3_group_first_block_no(sb, bg));
1550 static int ext3_fill_super (struct super_block *sb, void *data, int silent)
1552 struct buffer_head * bh;
1553 struct ext3_super_block *es = NULL;
1554 struct ext3_sb_info *sbi;
1556 ext3_fsblk_t sb_block = get_sb_block(&data);
1557 ext3_fsblk_t logic_sb_block;
1558 unsigned long offset = 0;
1559 unsigned int journal_inum = 0;
1560 unsigned long journal_devnum = 0;
1561 unsigned long def_mount_opts;
1572 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
1576 sbi->s_blockgroup_lock =
1577 kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
1578 if (!sbi->s_blockgroup_lock) {
1582 sb->s_fs_info = sbi;
1583 sbi->s_mount_opt = 0;
1584 sbi->s_resuid = EXT3_DEF_RESUID;
1585 sbi->s_resgid = EXT3_DEF_RESGID;
1586 sbi->s_sb_block = sb_block;
1590 blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE);
1592 printk(KERN_ERR "EXT3-fs: unable to set blocksize\n");
1597 * The ext3 superblock will not be buffer aligned for other than 1kB
1598 * block sizes. We need to calculate the offset from buffer start.
1600 if (blocksize != EXT3_MIN_BLOCK_SIZE) {
1601 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1602 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1604 logic_sb_block = sb_block;
1607 if (!(bh = sb_bread(sb, logic_sb_block))) {
1608 printk (KERN_ERR "EXT3-fs: unable to read superblock\n");
1612 * Note: s_es must be initialized as soon as possible because
1613 * some ext3 macro-instructions depend on its value
1615 es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
1617 sb->s_magic = le16_to_cpu(es->s_magic);
1618 if (sb->s_magic != EXT3_SUPER_MAGIC)
1621 /* Set defaults before we parse the mount options */
1622 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
1623 if (def_mount_opts & EXT3_DEFM_DEBUG)
1624 set_opt(sbi->s_mount_opt, DEBUG);
1625 if (def_mount_opts & EXT3_DEFM_BSDGROUPS)
1626 set_opt(sbi->s_mount_opt, GRPID);
1627 if (def_mount_opts & EXT3_DEFM_UID16)
1628 set_opt(sbi->s_mount_opt, NO_UID32);
1629 #ifdef CONFIG_EXT3_FS_XATTR
1630 if (def_mount_opts & EXT3_DEFM_XATTR_USER)
1631 set_opt(sbi->s_mount_opt, XATTR_USER);
1633 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1634 if (def_mount_opts & EXT3_DEFM_ACL)
1635 set_opt(sbi->s_mount_opt, POSIX_ACL);
1637 if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA)
1638 sbi->s_mount_opt |= EXT3_MOUNT_JOURNAL_DATA;
1639 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED)
1640 sbi->s_mount_opt |= EXT3_MOUNT_ORDERED_DATA;
1641 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK)
1642 sbi->s_mount_opt |= EXT3_MOUNT_WRITEBACK_DATA;
1644 if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC)
1645 set_opt(sbi->s_mount_opt, ERRORS_PANIC);
1646 else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_CONTINUE)
1647 set_opt(sbi->s_mount_opt, ERRORS_CONT);
1649 set_opt(sbi->s_mount_opt, ERRORS_RO);
1651 sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
1652 sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
1654 set_opt(sbi->s_mount_opt, RESERVATION);
1656 if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
1660 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1661 ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1663 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV &&
1664 (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) ||
1665 EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
1666 EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U)))
1668 "EXT3-fs warning: feature flags set on rev 0 fs, "
1669 "running e2fsck is recommended\n");
1671 * Check feature flags regardless of the revision level, since we
1672 * previously didn't change the revision level when setting the flags,
1673 * so there is a chance incompat flags are set on a rev 0 filesystem.
1675 features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP);
1677 printk(KERN_ERR "EXT3-fs: %s: couldn't mount because of "
1678 "unsupported optional features (%x).\n",
1679 sb->s_id, le32_to_cpu(features));
1682 features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP);
1683 if (!(sb->s_flags & MS_RDONLY) && features) {
1684 printk(KERN_ERR "EXT3-fs: %s: couldn't mount RDWR because of "
1685 "unsupported optional features (%x).\n",
1686 sb->s_id, le32_to_cpu(features));
1689 blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
1691 if (blocksize < EXT3_MIN_BLOCK_SIZE ||
1692 blocksize > EXT3_MAX_BLOCK_SIZE) {
1694 "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n",
1695 blocksize, sb->s_id);
1699 hblock = bdev_logical_block_size(sb->s_bdev);
1700 if (sb->s_blocksize != blocksize) {
1702 * Make sure the blocksize for the filesystem is larger
1703 * than the hardware sectorsize for the machine.
1705 if (blocksize < hblock) {
1706 printk(KERN_ERR "EXT3-fs: blocksize %d too small for "
1707 "device blocksize %d.\n", blocksize, hblock);
1712 if (!sb_set_blocksize(sb, blocksize)) {
1713 printk(KERN_ERR "EXT3-fs: bad blocksize %d.\n",
1717 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1718 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1719 bh = sb_bread(sb, logic_sb_block);
1722 "EXT3-fs: Can't read superblock on 2nd try.\n");
1725 es = (struct ext3_super_block *)(((char *)bh->b_data) + offset);
1727 if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) {
1729 "EXT3-fs: Magic mismatch, very weird !\n");
1734 sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits);
1736 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) {
1737 sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE;
1738 sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO;
1740 sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
1741 sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
1742 if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) ||
1743 (!is_power_of_2(sbi->s_inode_size)) ||
1744 (sbi->s_inode_size > blocksize)) {
1746 "EXT3-fs: unsupported inode size: %d\n",
1751 sbi->s_frag_size = EXT3_MIN_FRAG_SIZE <<
1752 le32_to_cpu(es->s_log_frag_size);
1753 if (blocksize != sbi->s_frag_size) {
1755 "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n",
1756 sbi->s_frag_size, blocksize);
1759 sbi->s_frags_per_block = 1;
1760 sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
1761 sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
1762 sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
1763 if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0)
1765 sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb);
1766 if (sbi->s_inodes_per_block == 0)
1768 sbi->s_itb_per_group = sbi->s_inodes_per_group /
1769 sbi->s_inodes_per_block;
1770 sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc);
1772 sbi->s_mount_state = le16_to_cpu(es->s_state);
1773 sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb));
1774 sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb));
1775 for (i=0; i < 4; i++)
1776 sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
1777 sbi->s_def_hash_version = es->s_def_hash_version;
1778 i = le32_to_cpu(es->s_flags);
1779 if (i & EXT2_FLAGS_UNSIGNED_HASH)
1780 sbi->s_hash_unsigned = 3;
1781 else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) {
1782 #ifdef __CHAR_UNSIGNED__
1783 es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH);
1784 sbi->s_hash_unsigned = 3;
1786 es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH);
1791 if (sbi->s_blocks_per_group > blocksize * 8) {
1793 "EXT3-fs: #blocks per group too big: %lu\n",
1794 sbi->s_blocks_per_group);
1797 if (sbi->s_frags_per_group > blocksize * 8) {
1799 "EXT3-fs: #fragments per group too big: %lu\n",
1800 sbi->s_frags_per_group);
1803 if (sbi->s_inodes_per_group > blocksize * 8) {
1805 "EXT3-fs: #inodes per group too big: %lu\n",
1806 sbi->s_inodes_per_group);
1810 if (le32_to_cpu(es->s_blocks_count) >
1811 (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) {
1812 printk(KERN_ERR "EXT3-fs: filesystem on %s:"
1813 " too large to mount safely\n", sb->s_id);
1814 if (sizeof(sector_t) < 8)
1815 printk(KERN_WARNING "EXT3-fs: CONFIG_LBD not "
1820 if (EXT3_BLOCKS_PER_GROUP(sb) == 0)
1822 sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
1823 le32_to_cpu(es->s_first_data_block) - 1)
1824 / EXT3_BLOCKS_PER_GROUP(sb)) + 1;
1825 db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) /
1826 EXT3_DESC_PER_BLOCK(sb);
1827 sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
1829 if (sbi->s_group_desc == NULL) {
1830 printk (KERN_ERR "EXT3-fs: not enough memory\n");
1834 bgl_lock_init(sbi->s_blockgroup_lock);
1836 for (i = 0; i < db_count; i++) {
1837 block = descriptor_loc(sb, logic_sb_block, i);
1838 sbi->s_group_desc[i] = sb_bread(sb, block);
1839 if (!sbi->s_group_desc[i]) {
1840 printk (KERN_ERR "EXT3-fs: "
1841 "can't read group descriptor %d\n", i);
1846 if (!ext3_check_descriptors (sb)) {
1847 printk(KERN_ERR "EXT3-fs: group descriptors corrupted!\n");
1850 sbi->s_gdb_count = db_count;
1851 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1852 spin_lock_init(&sbi->s_next_gen_lock);
1854 err = percpu_counter_init(&sbi->s_freeblocks_counter,
1855 ext3_count_free_blocks(sb));
1857 err = percpu_counter_init(&sbi->s_freeinodes_counter,
1858 ext3_count_free_inodes(sb));
1861 err = percpu_counter_init(&sbi->s_dirs_counter,
1862 ext3_count_dirs(sb));
1865 printk(KERN_ERR "EXT3-fs: insufficient memory\n");
1869 /* per fileystem reservation list head & lock */
1870 spin_lock_init(&sbi->s_rsv_window_lock);
1871 sbi->s_rsv_window_root = RB_ROOT;
1872 /* Add a single, static dummy reservation to the start of the
1873 * reservation window list --- it gives us a placeholder for
1874 * append-at-start-of-list which makes the allocation logic
1875 * _much_ simpler. */
1876 sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1877 sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1878 sbi->s_rsv_window_head.rsv_alloc_hit = 0;
1879 sbi->s_rsv_window_head.rsv_goal_size = 0;
1880 ext3_rsv_window_add(sb, &sbi->s_rsv_window_head);
1883 * set up enough so that it can read an inode
1885 sb->s_op = &ext3_sops;
1886 sb->s_export_op = &ext3_export_ops;
1887 sb->s_xattr = ext3_xattr_handlers;
1889 sb->s_qcop = &ext3_qctl_operations;
1890 sb->dq_op = &ext3_quota_operations;
1892 INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
1896 needs_recovery = (es->s_last_orphan != 0 ||
1897 EXT3_HAS_INCOMPAT_FEATURE(sb,
1898 EXT3_FEATURE_INCOMPAT_RECOVER));
1901 * The first inode we look at is the journal inode. Don't try
1902 * root first: it may be modified in the journal!
1904 if (!test_opt(sb, NOLOAD) &&
1905 EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1906 if (ext3_load_journal(sb, es, journal_devnum))
1908 } else if (journal_inum) {
1909 if (ext3_create_journal(sb, es, journal_inum))
1914 "ext3: No journal on filesystem on %s\n",
1919 /* We have now updated the journal if required, so we can
1920 * validate the data journaling mode. */
1921 switch (test_opt(sb, DATA_FLAGS)) {
1923 /* No mode set, assume a default based on the journal
1924 capabilities: ORDERED_DATA if the journal can
1925 cope, else JOURNAL_DATA */
1926 if (journal_check_available_features
1927 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE))
1928 set_opt(sbi->s_mount_opt, DEFAULT_DATA_MODE);
1930 set_opt(sbi->s_mount_opt, JOURNAL_DATA);
1933 case EXT3_MOUNT_ORDERED_DATA:
1934 case EXT3_MOUNT_WRITEBACK_DATA:
1935 if (!journal_check_available_features
1936 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) {
1937 printk(KERN_ERR "EXT3-fs: Journal does not support "
1938 "requested data journaling mode\n");
1945 if (test_opt(sb, NOBH)) {
1946 if (!(test_opt(sb, DATA_FLAGS) == EXT3_MOUNT_WRITEBACK_DATA)) {
1947 printk(KERN_WARNING "EXT3-fs: Ignoring nobh option - "
1948 "its supported only with writeback mode\n");
1949 clear_opt(sbi->s_mount_opt, NOBH);
1953 * The journal_load will have done any necessary log recovery,
1954 * so we can safely mount the rest of the filesystem now.
1957 root = ext3_iget(sb, EXT3_ROOT_INO);
1959 printk(KERN_ERR "EXT3-fs: get root inode failed\n");
1960 ret = PTR_ERR(root);
1963 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
1965 printk(KERN_ERR "EXT3-fs: corrupt root inode, run e2fsck\n");
1968 sb->s_root = d_alloc_root(root);
1970 printk(KERN_ERR "EXT3-fs: get root dentry failed\n");
1976 ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
1978 * akpm: core read_super() calls in here with the superblock locked.
1979 * That deadlocks, because orphan cleanup needs to lock the superblock
1980 * in numerous places. Here we just pop the lock - it's relatively
1981 * harmless, because we are now ready to accept write_super() requests,
1982 * and aviro says that's the only reason for hanging onto the
1985 EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS;
1986 ext3_orphan_cleanup(sb, es);
1987 EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS;
1989 printk (KERN_INFO "EXT3-fs: recovery complete.\n");
1990 ext3_mark_recovery_complete(sb, es);
1991 printk (KERN_INFO "EXT3-fs: mounted filesystem with %s data mode.\n",
1992 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal":
1993 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered":
2001 printk(KERN_ERR "VFS: Can't find ext3 filesystem on dev %s.\n",
2006 journal_destroy(sbi->s_journal);
2008 percpu_counter_destroy(&sbi->s_freeblocks_counter);
2009 percpu_counter_destroy(&sbi->s_freeinodes_counter);
2010 percpu_counter_destroy(&sbi->s_dirs_counter);
2012 for (i = 0; i < db_count; i++)
2013 brelse(sbi->s_group_desc[i]);
2014 kfree(sbi->s_group_desc);
2017 for (i = 0; i < MAXQUOTAS; i++)
2018 kfree(sbi->s_qf_names[i]);
2020 ext3_blkdev_remove(sbi);
2023 sb->s_fs_info = NULL;
2024 kfree(sbi->s_blockgroup_lock);
2031 * Setup any per-fs journal parameters now. We'll do this both on
2032 * initial mount, once the journal has been initialised but before we've
2033 * done any recovery; and again on any subsequent remount.
2035 static void ext3_init_journal_params(struct super_block *sb, journal_t *journal)
2037 struct ext3_sb_info *sbi = EXT3_SB(sb);
2039 if (sbi->s_commit_interval)
2040 journal->j_commit_interval = sbi->s_commit_interval;
2041 /* We could also set up an ext3-specific default for the commit
2042 * interval here, but for now we'll just fall back to the jbd
2045 spin_lock(&journal->j_state_lock);
2046 if (test_opt(sb, BARRIER))
2047 journal->j_flags |= JFS_BARRIER;
2049 journal->j_flags &= ~JFS_BARRIER;
2050 if (test_opt(sb, DATA_ERR_ABORT))
2051 journal->j_flags |= JFS_ABORT_ON_SYNCDATA_ERR;
2053 journal->j_flags &= ~JFS_ABORT_ON_SYNCDATA_ERR;
2054 spin_unlock(&journal->j_state_lock);
2057 static journal_t *ext3_get_journal(struct super_block *sb,
2058 unsigned int journal_inum)
2060 struct inode *journal_inode;
2063 /* First, test for the existence of a valid inode on disk. Bad
2064 * things happen if we iget() an unused inode, as the subsequent
2065 * iput() will try to delete it. */
2067 journal_inode = ext3_iget(sb, journal_inum);
2068 if (IS_ERR(journal_inode)) {
2069 printk(KERN_ERR "EXT3-fs: no journal found.\n");
2072 if (!journal_inode->i_nlink) {
2073 make_bad_inode(journal_inode);
2074 iput(journal_inode);
2075 printk(KERN_ERR "EXT3-fs: journal inode is deleted.\n");
2079 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2080 journal_inode, journal_inode->i_size);
2081 if (!S_ISREG(journal_inode->i_mode)) {
2082 printk(KERN_ERR "EXT3-fs: invalid journal inode.\n");
2083 iput(journal_inode);
2087 journal = journal_init_inode(journal_inode);
2089 printk(KERN_ERR "EXT3-fs: Could not load journal inode\n");
2090 iput(journal_inode);
2093 journal->j_private = sb;
2094 ext3_init_journal_params(sb, journal);
2098 static journal_t *ext3_get_dev_journal(struct super_block *sb,
2101 struct buffer_head * bh;
2105 int hblock, blocksize;
2106 ext3_fsblk_t sb_block;
2107 unsigned long offset;
2108 struct ext3_super_block * es;
2109 struct block_device *bdev;
2111 bdev = ext3_blkdev_get(j_dev);
2115 if (bd_claim(bdev, sb)) {
2117 "EXT3: failed to claim external journal device.\n");
2118 blkdev_put(bdev, FMODE_READ|FMODE_WRITE);
2122 blocksize = sb->s_blocksize;
2123 hblock = bdev_logical_block_size(bdev);
2124 if (blocksize < hblock) {
2126 "EXT3-fs: blocksize too small for journal device.\n");
2130 sb_block = EXT3_MIN_BLOCK_SIZE / blocksize;
2131 offset = EXT3_MIN_BLOCK_SIZE % blocksize;
2132 set_blocksize(bdev, blocksize);
2133 if (!(bh = __bread(bdev, sb_block, blocksize))) {
2134 printk(KERN_ERR "EXT3-fs: couldn't read superblock of "
2135 "external journal\n");
2139 es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
2140 if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) ||
2141 !(le32_to_cpu(es->s_feature_incompat) &
2142 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
2143 printk(KERN_ERR "EXT3-fs: external journal has "
2144 "bad superblock\n");
2149 if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
2150 printk(KERN_ERR "EXT3-fs: journal UUID does not match\n");
2155 len = le32_to_cpu(es->s_blocks_count);
2156 start = sb_block + 1;
2157 brelse(bh); /* we're done with the superblock */
2159 journal = journal_init_dev(bdev, sb->s_bdev,
2160 start, len, blocksize);
2162 printk(KERN_ERR "EXT3-fs: failed to create device journal\n");
2165 journal->j_private = sb;
2166 ll_rw_block(READ, 1, &journal->j_sb_buffer);
2167 wait_on_buffer(journal->j_sb_buffer);
2168 if (!buffer_uptodate(journal->j_sb_buffer)) {
2169 printk(KERN_ERR "EXT3-fs: I/O error on journal device\n");
2172 if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {
2173 printk(KERN_ERR "EXT3-fs: External journal has more than one "
2174 "user (unsupported) - %d\n",
2175 be32_to_cpu(journal->j_superblock->s_nr_users));
2178 EXT3_SB(sb)->journal_bdev = bdev;
2179 ext3_init_journal_params(sb, journal);
2182 journal_destroy(journal);
2184 ext3_blkdev_put(bdev);
2188 static int ext3_load_journal(struct super_block *sb,
2189 struct ext3_super_block *es,
2190 unsigned long journal_devnum)
2193 unsigned int journal_inum = le32_to_cpu(es->s_journal_inum);
2196 int really_read_only;
2198 if (journal_devnum &&
2199 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2200 printk(KERN_INFO "EXT3-fs: external journal device major/minor "
2201 "numbers have changed\n");
2202 journal_dev = new_decode_dev(journal_devnum);
2204 journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));
2206 really_read_only = bdev_read_only(sb->s_bdev);
2209 * Are we loading a blank journal or performing recovery after a
2210 * crash? For recovery, we need to check in advance whether we
2211 * can get read-write access to the device.
2214 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) {
2215 if (sb->s_flags & MS_RDONLY) {
2216 printk(KERN_INFO "EXT3-fs: INFO: recovery "
2217 "required on readonly filesystem.\n");
2218 if (really_read_only) {
2219 printk(KERN_ERR "EXT3-fs: write access "
2220 "unavailable, cannot proceed.\n");
2223 printk (KERN_INFO "EXT3-fs: write access will "
2224 "be enabled during recovery.\n");
2228 if (journal_inum && journal_dev) {
2229 printk(KERN_ERR "EXT3-fs: filesystem has both journal "
2230 "and inode journals!\n");
2235 if (!(journal = ext3_get_journal(sb, journal_inum)))
2238 if (!(journal = ext3_get_dev_journal(sb, journal_dev)))
2242 if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) {
2243 err = journal_update_format(journal);
2245 printk(KERN_ERR "EXT3-fs: error updating journal.\n");
2246 journal_destroy(journal);
2251 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER))
2252 err = journal_wipe(journal, !really_read_only);
2254 err = journal_load(journal);
2257 printk(KERN_ERR "EXT3-fs: error loading journal.\n");
2258 journal_destroy(journal);
2262 EXT3_SB(sb)->s_journal = journal;
2263 ext3_clear_journal_err(sb, es);
2265 if (journal_devnum &&
2266 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2267 es->s_journal_dev = cpu_to_le32(journal_devnum);
2270 /* Make sure we flush the recovery flag to disk. */
2271 ext3_commit_super(sb, es, 1);
2277 static int ext3_create_journal(struct super_block * sb,
2278 struct ext3_super_block * es,
2279 unsigned int journal_inum)
2284 if (sb->s_flags & MS_RDONLY) {
2285 printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to "
2286 "create journal.\n");
2290 journal = ext3_get_journal(sb, journal_inum);
2294 printk(KERN_INFO "EXT3-fs: creating new journal on inode %u\n",
2297 err = journal_create(journal);
2299 printk(KERN_ERR "EXT3-fs: error creating journal.\n");
2300 journal_destroy(journal);
2304 EXT3_SB(sb)->s_journal = journal;
2306 ext3_update_dynamic_rev(sb);
2307 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2308 EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL);
2310 es->s_journal_inum = cpu_to_le32(journal_inum);
2313 /* Make sure we flush the recovery flag to disk. */
2314 ext3_commit_super(sb, es, 1);
2319 static int ext3_commit_super(struct super_block *sb,
2320 struct ext3_super_block *es,
2323 struct buffer_head *sbh = EXT3_SB(sb)->s_sbh;
2328 es->s_wtime = cpu_to_le32(get_seconds());
2329 es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb));
2330 es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb));
2331 BUFFER_TRACE(sbh, "marking dirty");
2332 mark_buffer_dirty(sbh);
2334 error = sync_dirty_buffer(sbh);
2340 * Have we just finished recovery? If so, and if we are mounting (or
2341 * remounting) the filesystem readonly, then we will end up with a
2342 * consistent fs on disk. Record that fact.
2344 static void ext3_mark_recovery_complete(struct super_block * sb,
2345 struct ext3_super_block * es)
2347 journal_t *journal = EXT3_SB(sb)->s_journal;
2349 journal_lock_updates(journal);
2350 if (journal_flush(journal) < 0)
2354 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) &&
2355 sb->s_flags & MS_RDONLY) {
2356 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2358 ext3_commit_super(sb, es, 1);
2363 journal_unlock_updates(journal);
2367 * If we are mounting (or read-write remounting) a filesystem whose journal
2368 * has recorded an error from a previous lifetime, move that error to the
2369 * main filesystem now.
2371 static void ext3_clear_journal_err(struct super_block * sb,
2372 struct ext3_super_block * es)
2378 journal = EXT3_SB(sb)->s_journal;
2381 * Now check for any error status which may have been recorded in the
2382 * journal by a prior ext3_error() or ext3_abort()
2385 j_errno = journal_errno(journal);
2389 errstr = ext3_decode_error(sb, j_errno, nbuf);
2390 ext3_warning(sb, __func__, "Filesystem error recorded "
2391 "from previous mount: %s", errstr);
2392 ext3_warning(sb, __func__, "Marking fs in need of "
2393 "filesystem check.");
2395 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
2396 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
2397 ext3_commit_super (sb, es, 1);
2399 journal_clear_err(journal);
2404 * Force the running and committing transactions to commit,
2405 * and wait on the commit.
2407 int ext3_force_commit(struct super_block *sb)
2412 if (sb->s_flags & MS_RDONLY)
2415 journal = EXT3_SB(sb)->s_journal;
2417 ret = ext3_journal_force_commit(journal);
2422 * Ext3 always journals updates to the superblock itself, so we don't
2423 * have to propagate any other updates to the superblock on disk at this
2424 * point. (We can probably nuke this function altogether, and remove
2425 * any mention to sb->s_dirt in all of fs/ext3; eventual cleanup...)
2427 static void ext3_write_super (struct super_block * sb)
2429 if (mutex_trylock(&sb->s_lock) != 0)
2434 static int ext3_sync_fs(struct super_block *sb, int wait)
2439 if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) {
2441 log_wait_commit(EXT3_SB(sb)->s_journal, target);
2447 * LVM calls this function before a (read-only) snapshot is created. This
2448 * gives us a chance to flush the journal completely and mark the fs clean.
2450 static int ext3_freeze(struct super_block *sb)
2456 if (!(sb->s_flags & MS_RDONLY)) {
2457 journal = EXT3_SB(sb)->s_journal;
2459 /* Now we set up the journal barrier. */
2460 journal_lock_updates(journal);
2463 * We don't want to clear needs_recovery flag when we failed
2464 * to flush the journal.
2466 error = journal_flush(journal);
2470 /* Journal blocked and flushed, clear needs_recovery flag. */
2471 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2472 error = ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2479 journal_unlock_updates(journal);
2484 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2485 * flag here, even though the filesystem is not technically dirty yet.
2487 static int ext3_unfreeze(struct super_block *sb)
2489 if (!(sb->s_flags & MS_RDONLY)) {
2491 /* Reser the needs_recovery flag before the fs is unlocked. */
2492 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2493 ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2495 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2500 static int ext3_remount (struct super_block * sb, int * flags, char * data)
2502 struct ext3_super_block * es;
2503 struct ext3_sb_info *sbi = EXT3_SB(sb);
2504 ext3_fsblk_t n_blocks_count = 0;
2505 unsigned long old_sb_flags;
2506 struct ext3_mount_options old_opts;
2512 /* Store the original options */
2513 old_sb_flags = sb->s_flags;
2514 old_opts.s_mount_opt = sbi->s_mount_opt;
2515 old_opts.s_resuid = sbi->s_resuid;
2516 old_opts.s_resgid = sbi->s_resgid;
2517 old_opts.s_commit_interval = sbi->s_commit_interval;
2519 old_opts.s_jquota_fmt = sbi->s_jquota_fmt;
2520 for (i = 0; i < MAXQUOTAS; i++)
2521 old_opts.s_qf_names[i] = sbi->s_qf_names[i];
2525 * Allow the "check" option to be passed as a remount option.
2527 if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) {
2532 if (sbi->s_mount_opt & EXT3_MOUNT_ABORT)
2533 ext3_abort(sb, __func__, "Abort forced by user");
2535 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
2536 ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
2540 ext3_init_journal_params(sb, sbi->s_journal);
2542 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) ||
2543 n_blocks_count > le32_to_cpu(es->s_blocks_count)) {
2544 if (sbi->s_mount_opt & EXT3_MOUNT_ABORT) {
2549 if (*flags & MS_RDONLY) {
2551 * First of all, the unconditional stuff we have to do
2552 * to disable replay of the journal when we next remount
2554 sb->s_flags |= MS_RDONLY;
2557 * OK, test if we are remounting a valid rw partition
2558 * readonly, and if so set the rdonly flag and then
2559 * mark the partition as valid again.
2561 if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) &&
2562 (sbi->s_mount_state & EXT3_VALID_FS))
2563 es->s_state = cpu_to_le16(sbi->s_mount_state);
2566 * We have to unlock super so that we can wait for
2570 ext3_mark_recovery_complete(sb, es);
2574 if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb,
2575 ~EXT3_FEATURE_RO_COMPAT_SUPP))) {
2576 printk(KERN_WARNING "EXT3-fs: %s: couldn't "
2577 "remount RDWR because of unsupported "
2578 "optional features (%x).\n",
2579 sb->s_id, le32_to_cpu(ret));
2585 * If we have an unprocessed orphan list hanging
2586 * around from a previously readonly bdev mount,
2587 * require a full umount/remount for now.
2589 if (es->s_last_orphan) {
2590 printk(KERN_WARNING "EXT3-fs: %s: couldn't "
2591 "remount RDWR because of unprocessed "
2592 "orphan inode list. Please "
2593 "umount/remount instead.\n",
2600 * Mounting a RDONLY partition read-write, so reread
2601 * and store the current valid flag. (It may have
2602 * been changed by e2fsck since we originally mounted
2605 ext3_clear_journal_err(sb, es);
2606 sbi->s_mount_state = le16_to_cpu(es->s_state);
2607 if ((err = ext3_group_extend(sb, es, n_blocks_count)))
2609 if (!ext3_setup_super (sb, es, 0))
2610 sb->s_flags &= ~MS_RDONLY;
2614 /* Release old quota file names */
2615 for (i = 0; i < MAXQUOTAS; i++)
2616 if (old_opts.s_qf_names[i] &&
2617 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2618 kfree(old_opts.s_qf_names[i]);
2622 sb->s_flags = old_sb_flags;
2623 sbi->s_mount_opt = old_opts.s_mount_opt;
2624 sbi->s_resuid = old_opts.s_resuid;
2625 sbi->s_resgid = old_opts.s_resgid;
2626 sbi->s_commit_interval = old_opts.s_commit_interval;
2628 sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
2629 for (i = 0; i < MAXQUOTAS; i++) {
2630 if (sbi->s_qf_names[i] &&
2631 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2632 kfree(sbi->s_qf_names[i]);
2633 sbi->s_qf_names[i] = old_opts.s_qf_names[i];
2639 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
2641 struct super_block *sb = dentry->d_sb;
2642 struct ext3_sb_info *sbi = EXT3_SB(sb);
2643 struct ext3_super_block *es = sbi->s_es;
2646 if (test_opt(sb, MINIX_DF)) {
2647 sbi->s_overhead_last = 0;
2648 } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
2649 unsigned long ngroups = sbi->s_groups_count, i;
2650 ext3_fsblk_t overhead = 0;
2654 * Compute the overhead (FS structures). This is constant
2655 * for a given filesystem unless the number of block groups
2656 * changes so we cache the previous value until it does.
2660 * All of the blocks before first_data_block are
2663 overhead = le32_to_cpu(es->s_first_data_block);
2666 * Add the overhead attributed to the superblock and
2667 * block group descriptors. If the sparse superblocks
2668 * feature is turned on, then not all groups have this.
2670 for (i = 0; i < ngroups; i++) {
2671 overhead += ext3_bg_has_super(sb, i) +
2672 ext3_bg_num_gdb(sb, i);
2677 * Every block group has an inode bitmap, a block
2678 * bitmap, and an inode table.
2680 overhead += ngroups * (2 + sbi->s_itb_per_group);
2681 sbi->s_overhead_last = overhead;
2683 sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
2686 buf->f_type = EXT3_SUPER_MAGIC;
2687 buf->f_bsize = sb->s_blocksize;
2688 buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last;
2689 buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter);
2690 es->s_free_blocks_count = cpu_to_le32(buf->f_bfree);
2691 buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
2692 if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
2694 buf->f_files = le32_to_cpu(es->s_inodes_count);
2695 buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);
2696 es->s_free_inodes_count = cpu_to_le32(buf->f_ffree);
2697 buf->f_namelen = EXT3_NAME_LEN;
2698 fsid = le64_to_cpup((void *)es->s_uuid) ^
2699 le64_to_cpup((void *)es->s_uuid + sizeof(u64));
2700 buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
2701 buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
2705 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2706 * is locked for write. Otherwise the are possible deadlocks:
2707 * Process 1 Process 2
2708 * ext3_create() quota_sync()
2709 * journal_start() write_dquot()
2710 * vfs_dq_init() down(dqio_mutex)
2711 * down(dqio_mutex) journal_start()
2717 static inline struct inode *dquot_to_inode(struct dquot *dquot)
2719 return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
2722 static int ext3_write_dquot(struct dquot *dquot)
2726 struct inode *inode;
2728 inode = dquot_to_inode(dquot);
2729 handle = ext3_journal_start(inode,
2730 EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2732 return PTR_ERR(handle);
2733 ret = dquot_commit(dquot);
2734 err = ext3_journal_stop(handle);
2740 static int ext3_acquire_dquot(struct dquot *dquot)
2745 handle = ext3_journal_start(dquot_to_inode(dquot),
2746 EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2748 return PTR_ERR(handle);
2749 ret = dquot_acquire(dquot);
2750 err = ext3_journal_stop(handle);
2756 static int ext3_release_dquot(struct dquot *dquot)
2761 handle = ext3_journal_start(dquot_to_inode(dquot),
2762 EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2763 if (IS_ERR(handle)) {
2764 /* Release dquot anyway to avoid endless cycle in dqput() */
2765 dquot_release(dquot);
2766 return PTR_ERR(handle);
2768 ret = dquot_release(dquot);
2769 err = ext3_journal_stop(handle);
2775 static int ext3_mark_dquot_dirty(struct dquot *dquot)
2777 /* Are we journaling quotas? */
2778 if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2779 EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2780 dquot_mark_dquot_dirty(dquot);
2781 return ext3_write_dquot(dquot);
2783 return dquot_mark_dquot_dirty(dquot);
2787 static int ext3_write_info(struct super_block *sb, int type)
2792 /* Data block + inode block */
2793 handle = ext3_journal_start(sb->s_root->d_inode, 2);
2795 return PTR_ERR(handle);
2796 ret = dquot_commit_info(sb, type);
2797 err = ext3_journal_stop(handle);
2804 * Turn on quotas during mount time - we need to find
2805 * the quota file and such...
2807 static int ext3_quota_on_mount(struct super_block *sb, int type)
2809 return vfs_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type],
2810 EXT3_SB(sb)->s_jquota_fmt, type);
2814 * Standard function to be called on quota_on
2816 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
2817 char *name, int remount)
2822 if (!test_opt(sb, QUOTA))
2824 /* When remounting, no checks are needed and in fact, name is NULL */
2826 return vfs_quota_on(sb, type, format_id, name, remount);
2828 err = kern_path(name, LOOKUP_FOLLOW, &path);
2832 /* Quotafile not on the same filesystem? */
2833 if (path.mnt->mnt_sb != sb) {
2837 /* Journaling quota? */
2838 if (EXT3_SB(sb)->s_qf_names[type]) {
2839 /* Quotafile not of fs root? */
2840 if (path.dentry->d_parent != sb->s_root)
2842 "EXT3-fs: Quota file not on filesystem root. "
2843 "Journaled quota will not work.\n");
2847 * When we journal data on quota file, we have to flush journal to see
2848 * all updates to the file when we bypass pagecache...
2850 if (ext3_should_journal_data(path.dentry->d_inode)) {
2852 * We don't need to lock updates but journal_flush() could
2853 * otherwise be livelocked...
2855 journal_lock_updates(EXT3_SB(sb)->s_journal);
2856 err = journal_flush(EXT3_SB(sb)->s_journal);
2857 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2864 err = vfs_quota_on_path(sb, type, format_id, &path);
2869 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2870 * acquiring the locks... As quota files are never truncated and quota code
2871 * itself serializes the operations (and noone else should touch the files)
2872 * we don't have to be afraid of races */
2873 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
2874 size_t len, loff_t off)
2876 struct inode *inode = sb_dqopt(sb)->files[type];
2877 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2879 int offset = off & (sb->s_blocksize - 1);
2882 struct buffer_head *bh;
2883 loff_t i_size = i_size_read(inode);
2887 if (off+len > i_size)
2890 while (toread > 0) {
2891 tocopy = sb->s_blocksize - offset < toread ?
2892 sb->s_blocksize - offset : toread;
2893 bh = ext3_bread(NULL, inode, blk, 0, &err);
2896 if (!bh) /* A hole? */
2897 memset(data, 0, tocopy);
2899 memcpy(data, bh->b_data+offset, tocopy);
2909 /* Write to quotafile (we know the transaction is already started and has
2910 * enough credits) */
2911 static ssize_t ext3_quota_write(struct super_block *sb, int type,
2912 const char *data, size_t len, loff_t off)
2914 struct inode *inode = sb_dqopt(sb)->files[type];
2915 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2917 int offset = off & (sb->s_blocksize - 1);
2919 int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL;
2920 size_t towrite = len;
2921 struct buffer_head *bh;
2922 handle_t *handle = journal_current_handle();
2925 printk(KERN_WARNING "EXT3-fs: Quota write (off=%Lu, len=%Lu)"
2926 " cancelled because transaction is not started.\n",
2927 (unsigned long long)off, (unsigned long long)len);
2930 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2931 while (towrite > 0) {
2932 tocopy = sb->s_blocksize - offset < towrite ?
2933 sb->s_blocksize - offset : towrite;
2934 bh = ext3_bread(handle, inode, blk, 1, &err);
2937 if (journal_quota) {
2938 err = ext3_journal_get_write_access(handle, bh);
2945 memcpy(bh->b_data+offset, data, tocopy);
2946 flush_dcache_page(bh->b_page);
2949 err = ext3_journal_dirty_metadata(handle, bh);
2951 /* Always do at least ordered writes for quotas */
2952 err = ext3_journal_dirty_data(handle, bh);
2953 mark_buffer_dirty(bh);
2964 if (len == towrite) {
2965 mutex_unlock(&inode->i_mutex);
2968 if (inode->i_size < off+len-towrite) {
2969 i_size_write(inode, off+len-towrite);
2970 EXT3_I(inode)->i_disksize = inode->i_size;
2973 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2974 ext3_mark_inode_dirty(handle, inode);
2975 mutex_unlock(&inode->i_mutex);
2976 return len - towrite;
2981 static int ext3_get_sb(struct file_system_type *fs_type,
2982 int flags, const char *dev_name, void *data, struct vfsmount *mnt)
2984 return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super, mnt);
2987 static struct file_system_type ext3_fs_type = {
2988 .owner = THIS_MODULE,
2990 .get_sb = ext3_get_sb,
2991 .kill_sb = kill_block_super,
2992 .fs_flags = FS_REQUIRES_DEV,
2995 static int __init init_ext3_fs(void)
2997 int err = init_ext3_xattr();
3000 err = init_inodecache();
3003 err = register_filesystem(&ext3_fs_type);
3008 destroy_inodecache();
3014 static void __exit exit_ext3_fs(void)
3016 unregister_filesystem(&ext3_fs_type);
3017 destroy_inodecache();
3021 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3022 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3023 MODULE_LICENSE("GPL");
3024 module_init(init_ext3_fs)
3025 module_exit(exit_ext3_fs)