2 * linux/fs/ext3/super.c
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
11 * linux/fs/minix/inode.c
13 * Copyright (C) 1991, 1992 Linus Torvalds
15 * Big-endian to little-endian byte-swapping/bitmaps by
16 * David S. Miller (davem@caip.rutgers.edu), 1995
19 #include <linux/module.h>
20 #include <linux/string.h>
22 #include <linux/time.h>
23 #include <linux/jbd.h>
24 #include <linux/ext3_fs.h>
25 #include <linux/ext3_jbd.h>
26 #include <linux/slab.h>
27 #include <linux/init.h>
28 #include <linux/blkdev.h>
29 #include <linux/parser.h>
30 #include <linux/buffer_head.h>
31 #include <linux/exportfs.h>
32 #include <linux/vfs.h>
33 #include <linux/random.h>
34 #include <linux/mount.h>
35 #include <linux/namei.h>
36 #include <linux/quotaops.h>
37 #include <linux/seq_file.h>
38 #include <linux/log2.h>
39 #include <linux/cleancache.h>
41 #include <asm/uaccess.h>
47 #define CREATE_TRACE_POINTS
48 #include <trace/events/ext3.h>
50 #ifdef CONFIG_EXT3_DEFAULTS_TO_ORDERED
51 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_ORDERED_DATA
53 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_WRITEBACK_DATA
56 static int ext3_load_journal(struct super_block *, struct ext3_super_block *,
57 unsigned long journal_devnum);
58 static int ext3_create_journal(struct super_block *, struct ext3_super_block *,
60 static int ext3_commit_super(struct super_block *sb,
61 struct ext3_super_block *es,
63 static void ext3_mark_recovery_complete(struct super_block * sb,
64 struct ext3_super_block * es);
65 static void ext3_clear_journal_err(struct super_block * sb,
66 struct ext3_super_block * es);
67 static int ext3_sync_fs(struct super_block *sb, int wait);
68 static const char *ext3_decode_error(struct super_block * sb, int errno,
70 static int ext3_remount (struct super_block * sb, int * flags, char * data);
71 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf);
72 static int ext3_unfreeze(struct super_block *sb);
73 static int ext3_freeze(struct super_block *sb);
76 * Wrappers for journal_start/end.
78 * The only special thing we need to do here is to make sure that all
79 * journal_end calls result in the superblock being marked dirty, so
80 * that sync() will call the filesystem's write_super callback if
83 handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
87 if (sb->s_flags & MS_RDONLY)
88 return ERR_PTR(-EROFS);
90 /* Special case here: if the journal has aborted behind our
91 * backs (eg. EIO in the commit thread), then we still need to
92 * take the FS itself readonly cleanly. */
93 journal = EXT3_SB(sb)->s_journal;
94 if (is_journal_aborted(journal)) {
95 ext3_abort(sb, __func__,
96 "Detected aborted journal");
97 return ERR_PTR(-EROFS);
100 return journal_start(journal, nblocks);
104 * The only special thing we need to do here is to make sure that all
105 * journal_stop calls result in the superblock being marked dirty, so
106 * that sync() will call the filesystem's write_super callback if
109 int __ext3_journal_stop(const char *where, handle_t *handle)
111 struct super_block *sb;
115 sb = handle->h_transaction->t_journal->j_private;
117 rc = journal_stop(handle);
122 __ext3_std_error(sb, where, err);
126 void ext3_journal_abort_handle(const char *caller, const char *err_fn,
127 struct buffer_head *bh, handle_t *handle, int err)
130 const char *errstr = ext3_decode_error(NULL, err, nbuf);
133 BUFFER_TRACE(bh, "abort");
138 if (is_handle_aborted(handle))
141 printk(KERN_ERR "EXT3-fs: %s: aborting transaction: %s in %s\n",
142 caller, errstr, err_fn);
144 journal_abort_handle(handle);
147 void ext3_msg(struct super_block *sb, const char *prefix,
148 const char *fmt, ...)
150 struct va_format vaf;
158 printk("%sEXT3-fs (%s): %pV\n", prefix, sb->s_id, &vaf);
163 /* Deal with the reporting of failure conditions on a filesystem such as
164 * inconsistencies detected or read IO failures.
166 * On ext2, we can store the error state of the filesystem in the
167 * superblock. That is not possible on ext3, because we may have other
168 * write ordering constraints on the superblock which prevent us from
169 * writing it out straight away; and given that the journal is about to
170 * be aborted, we can't rely on the current, or future, transactions to
171 * write out the superblock safely.
173 * We'll just use the journal_abort() error code to record an error in
174 * the journal instead. On recovery, the journal will complain about
175 * that error until we've noted it down and cleared it.
178 static void ext3_handle_error(struct super_block *sb)
180 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
182 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
183 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
185 if (sb->s_flags & MS_RDONLY)
188 if (!test_opt (sb, ERRORS_CONT)) {
189 journal_t *journal = EXT3_SB(sb)->s_journal;
191 set_opt(EXT3_SB(sb)->s_mount_opt, ABORT);
193 journal_abort(journal, -EIO);
195 if (test_opt (sb, ERRORS_RO)) {
196 ext3_msg(sb, KERN_CRIT,
197 "error: remounting filesystem read-only");
198 sb->s_flags |= MS_RDONLY;
200 ext3_commit_super(sb, es, 1);
201 if (test_opt(sb, ERRORS_PANIC))
202 panic("EXT3-fs (%s): panic forced after error\n",
206 void ext3_error(struct super_block *sb, const char *function,
207 const char *fmt, ...)
209 struct va_format vaf;
217 printk(KERN_CRIT "EXT3-fs error (device %s): %s: %pV\n",
218 sb->s_id, function, &vaf);
222 ext3_handle_error(sb);
225 static const char *ext3_decode_error(struct super_block * sb, int errno,
232 errstr = "IO failure";
235 errstr = "Out of memory";
238 if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT)
239 errstr = "Journal has aborted";
241 errstr = "Readonly filesystem";
244 /* If the caller passed in an extra buffer for unknown
245 * errors, textualise them now. Else we just return
248 /* Check for truncated error codes... */
249 if (snprintf(nbuf, 16, "error %d", -errno) >= 0)
258 /* __ext3_std_error decodes expected errors from journaling functions
259 * automatically and invokes the appropriate error response. */
261 void __ext3_std_error (struct super_block * sb, const char * function,
267 /* Special case: if the error is EROFS, and we're not already
268 * inside a transaction, then there's really no point in logging
270 if (errno == -EROFS && journal_current_handle() == NULL &&
271 (sb->s_flags & MS_RDONLY))
274 errstr = ext3_decode_error(sb, errno, nbuf);
275 ext3_msg(sb, KERN_CRIT, "error in %s: %s", function, errstr);
277 ext3_handle_error(sb);
281 * ext3_abort is a much stronger failure handler than ext3_error. The
282 * abort function may be used to deal with unrecoverable failures such
283 * as journal IO errors or ENOMEM at a critical moment in log management.
285 * We unconditionally force the filesystem into an ABORT|READONLY state,
286 * unless the error response on the fs has been set to panic in which
287 * case we take the easy way out and panic immediately.
290 void ext3_abort(struct super_block *sb, const char *function,
291 const char *fmt, ...)
293 struct va_format vaf;
301 printk(KERN_CRIT "EXT3-fs (%s): error: %s: %pV\n",
302 sb->s_id, function, &vaf);
306 if (test_opt(sb, ERRORS_PANIC))
307 panic("EXT3-fs: panic from previous error\n");
309 if (sb->s_flags & MS_RDONLY)
312 ext3_msg(sb, KERN_CRIT,
313 "error: remounting filesystem read-only");
314 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
315 sb->s_flags |= MS_RDONLY;
316 set_opt(EXT3_SB(sb)->s_mount_opt, ABORT);
317 if (EXT3_SB(sb)->s_journal)
318 journal_abort(EXT3_SB(sb)->s_journal, -EIO);
321 void ext3_warning(struct super_block *sb, const char *function,
322 const char *fmt, ...)
324 struct va_format vaf;
332 printk(KERN_WARNING "EXT3-fs (%s): warning: %s: %pV\n",
333 sb->s_id, function, &vaf);
338 void ext3_update_dynamic_rev(struct super_block *sb)
340 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
342 if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV)
345 ext3_msg(sb, KERN_WARNING,
346 "warning: updating to rev %d because of "
347 "new feature flag, running e2fsck is recommended",
350 es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO);
351 es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE);
352 es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV);
353 /* leave es->s_feature_*compat flags alone */
354 /* es->s_uuid will be set by e2fsck if empty */
357 * The rest of the superblock fields should be zero, and if not it
358 * means they are likely already in use, so leave them alone. We
359 * can leave it up to e2fsck to clean up any inconsistencies there.
364 * Open the external journal device
366 static struct block_device *ext3_blkdev_get(dev_t dev, struct super_block *sb)
368 struct block_device *bdev;
369 char b[BDEVNAME_SIZE];
371 bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb);
377 ext3_msg(sb, KERN_ERR, "error: failed to open journal device %s: %ld",
378 __bdevname(dev, b), PTR_ERR(bdev));
384 * Release the journal device
386 static int ext3_blkdev_put(struct block_device *bdev)
388 return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
391 static int ext3_blkdev_remove(struct ext3_sb_info *sbi)
393 struct block_device *bdev;
396 bdev = sbi->journal_bdev;
398 ret = ext3_blkdev_put(bdev);
399 sbi->journal_bdev = NULL;
404 static inline struct inode *orphan_list_entry(struct list_head *l)
406 return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode;
409 static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
413 ext3_msg(sb, KERN_ERR, "error: sb orphan head is %d",
414 le32_to_cpu(sbi->s_es->s_last_orphan));
416 ext3_msg(sb, KERN_ERR, "sb_info orphan list:");
417 list_for_each(l, &sbi->s_orphan) {
418 struct inode *inode = orphan_list_entry(l);
419 ext3_msg(sb, KERN_ERR, " "
420 "inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
421 inode->i_sb->s_id, inode->i_ino, inode,
422 inode->i_mode, inode->i_nlink,
427 static void ext3_put_super (struct super_block * sb)
429 struct ext3_sb_info *sbi = EXT3_SB(sb);
430 struct ext3_super_block *es = sbi->s_es;
433 dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
434 ext3_xattr_put_super(sb);
435 err = journal_destroy(sbi->s_journal);
436 sbi->s_journal = NULL;
438 ext3_abort(sb, __func__, "Couldn't clean up the journal");
440 if (!(sb->s_flags & MS_RDONLY)) {
441 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
442 es->s_state = cpu_to_le16(sbi->s_mount_state);
443 BUFFER_TRACE(sbi->s_sbh, "marking dirty");
444 mark_buffer_dirty(sbi->s_sbh);
445 ext3_commit_super(sb, es, 1);
448 for (i = 0; i < sbi->s_gdb_count; i++)
449 brelse(sbi->s_group_desc[i]);
450 kfree(sbi->s_group_desc);
451 percpu_counter_destroy(&sbi->s_freeblocks_counter);
452 percpu_counter_destroy(&sbi->s_freeinodes_counter);
453 percpu_counter_destroy(&sbi->s_dirs_counter);
456 for (i = 0; i < MAXQUOTAS; i++)
457 kfree(sbi->s_qf_names[i]);
460 /* Debugging code just in case the in-memory inode orphan list
461 * isn't empty. The on-disk one can be non-empty if we've
462 * detected an error and taken the fs readonly, but the
463 * in-memory list had better be clean by this point. */
464 if (!list_empty(&sbi->s_orphan))
465 dump_orphan_list(sb, sbi);
466 J_ASSERT(list_empty(&sbi->s_orphan));
468 invalidate_bdev(sb->s_bdev);
469 if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) {
471 * Invalidate the journal device's buffers. We don't want them
472 * floating about in memory - the physical journal device may
473 * hotswapped, and it breaks the `ro-after' testing code.
475 sync_blockdev(sbi->journal_bdev);
476 invalidate_bdev(sbi->journal_bdev);
477 ext3_blkdev_remove(sbi);
479 sb->s_fs_info = NULL;
480 kfree(sbi->s_blockgroup_lock);
484 static struct kmem_cache *ext3_inode_cachep;
487 * Called inside transaction, so use GFP_NOFS
489 static struct inode *ext3_alloc_inode(struct super_block *sb)
491 struct ext3_inode_info *ei;
493 ei = kmem_cache_alloc(ext3_inode_cachep, GFP_NOFS);
496 ei->i_block_alloc_info = NULL;
497 ei->vfs_inode.i_version = 1;
498 atomic_set(&ei->i_datasync_tid, 0);
499 atomic_set(&ei->i_sync_tid, 0);
500 return &ei->vfs_inode;
503 static int ext3_drop_inode(struct inode *inode)
505 int drop = generic_drop_inode(inode);
507 trace_ext3_drop_inode(inode, drop);
511 static void ext3_i_callback(struct rcu_head *head)
513 struct inode *inode = container_of(head, struct inode, i_rcu);
514 INIT_LIST_HEAD(&inode->i_dentry);
515 kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
518 static void ext3_destroy_inode(struct inode *inode)
520 if (!list_empty(&(EXT3_I(inode)->i_orphan))) {
521 printk("EXT3 Inode %p: orphan list check failed!\n",
523 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4,
524 EXT3_I(inode), sizeof(struct ext3_inode_info),
528 call_rcu(&inode->i_rcu, ext3_i_callback);
531 static void init_once(void *foo)
533 struct ext3_inode_info *ei = (struct ext3_inode_info *) foo;
535 INIT_LIST_HEAD(&ei->i_orphan);
536 #ifdef CONFIG_EXT3_FS_XATTR
537 init_rwsem(&ei->xattr_sem);
539 mutex_init(&ei->truncate_mutex);
540 inode_init_once(&ei->vfs_inode);
543 static int init_inodecache(void)
545 ext3_inode_cachep = kmem_cache_create("ext3_inode_cache",
546 sizeof(struct ext3_inode_info),
547 0, (SLAB_RECLAIM_ACCOUNT|
550 if (ext3_inode_cachep == NULL)
555 static void destroy_inodecache(void)
557 kmem_cache_destroy(ext3_inode_cachep);
560 static inline void ext3_show_quota_options(struct seq_file *seq, struct super_block *sb)
562 #if defined(CONFIG_QUOTA)
563 struct ext3_sb_info *sbi = EXT3_SB(sb);
565 if (sbi->s_jquota_fmt) {
568 switch (sbi->s_jquota_fmt) {
579 seq_printf(seq, ",jqfmt=%s", fmtname);
582 if (sbi->s_qf_names[USRQUOTA])
583 seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]);
585 if (sbi->s_qf_names[GRPQUOTA])
586 seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]);
588 if (test_opt(sb, USRQUOTA))
589 seq_puts(seq, ",usrquota");
591 if (test_opt(sb, GRPQUOTA))
592 seq_puts(seq, ",grpquota");
596 static char *data_mode_string(unsigned long mode)
599 case EXT3_MOUNT_JOURNAL_DATA:
601 case EXT3_MOUNT_ORDERED_DATA:
603 case EXT3_MOUNT_WRITEBACK_DATA:
611 * - it's set to a non-default value OR
612 * - if the per-sb default is different from the global default
614 static int ext3_show_options(struct seq_file *seq, struct vfsmount *vfs)
616 struct super_block *sb = vfs->mnt_sb;
617 struct ext3_sb_info *sbi = EXT3_SB(sb);
618 struct ext3_super_block *es = sbi->s_es;
619 unsigned long def_mount_opts;
621 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
623 if (sbi->s_sb_block != 1)
624 seq_printf(seq, ",sb=%lu", sbi->s_sb_block);
625 if (test_opt(sb, MINIX_DF))
626 seq_puts(seq, ",minixdf");
627 if (test_opt(sb, GRPID))
628 seq_puts(seq, ",grpid");
629 if (!test_opt(sb, GRPID) && (def_mount_opts & EXT3_DEFM_BSDGROUPS))
630 seq_puts(seq, ",nogrpid");
631 if (sbi->s_resuid != EXT3_DEF_RESUID ||
632 le16_to_cpu(es->s_def_resuid) != EXT3_DEF_RESUID) {
633 seq_printf(seq, ",resuid=%u", sbi->s_resuid);
635 if (sbi->s_resgid != EXT3_DEF_RESGID ||
636 le16_to_cpu(es->s_def_resgid) != EXT3_DEF_RESGID) {
637 seq_printf(seq, ",resgid=%u", sbi->s_resgid);
639 if (test_opt(sb, ERRORS_RO)) {
640 int def_errors = le16_to_cpu(es->s_errors);
642 if (def_errors == EXT3_ERRORS_PANIC ||
643 def_errors == EXT3_ERRORS_CONTINUE) {
644 seq_puts(seq, ",errors=remount-ro");
647 if (test_opt(sb, ERRORS_CONT))
648 seq_puts(seq, ",errors=continue");
649 if (test_opt(sb, ERRORS_PANIC))
650 seq_puts(seq, ",errors=panic");
651 if (test_opt(sb, NO_UID32))
652 seq_puts(seq, ",nouid32");
653 if (test_opt(sb, DEBUG))
654 seq_puts(seq, ",debug");
655 #ifdef CONFIG_EXT3_FS_XATTR
656 if (test_opt(sb, XATTR_USER))
657 seq_puts(seq, ",user_xattr");
658 if (!test_opt(sb, XATTR_USER) &&
659 (def_mount_opts & EXT3_DEFM_XATTR_USER)) {
660 seq_puts(seq, ",nouser_xattr");
663 #ifdef CONFIG_EXT3_FS_POSIX_ACL
664 if (test_opt(sb, POSIX_ACL))
665 seq_puts(seq, ",acl");
666 if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT3_DEFM_ACL))
667 seq_puts(seq, ",noacl");
669 if (!test_opt(sb, RESERVATION))
670 seq_puts(seq, ",noreservation");
671 if (sbi->s_commit_interval) {
672 seq_printf(seq, ",commit=%u",
673 (unsigned) (sbi->s_commit_interval / HZ));
677 * Always display barrier state so it's clear what the status is.
679 seq_puts(seq, ",barrier=");
680 seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0");
681 seq_printf(seq, ",data=%s", data_mode_string(test_opt(sb, DATA_FLAGS)));
682 if (test_opt(sb, DATA_ERR_ABORT))
683 seq_puts(seq, ",data_err=abort");
685 if (test_opt(sb, NOLOAD))
686 seq_puts(seq, ",norecovery");
688 ext3_show_quota_options(seq, sb);
694 static struct inode *ext3_nfs_get_inode(struct super_block *sb,
695 u64 ino, u32 generation)
699 if (ino < EXT3_FIRST_INO(sb) && ino != EXT3_ROOT_INO)
700 return ERR_PTR(-ESTALE);
701 if (ino > le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count))
702 return ERR_PTR(-ESTALE);
704 /* iget isn't really right if the inode is currently unallocated!!
706 * ext3_read_inode will return a bad_inode if the inode had been
707 * deleted, so we should be safe.
709 * Currently we don't know the generation for parent directory, so
710 * a generation of 0 means "accept any"
712 inode = ext3_iget(sb, ino);
714 return ERR_CAST(inode);
715 if (generation && inode->i_generation != generation) {
717 return ERR_PTR(-ESTALE);
723 static struct dentry *ext3_fh_to_dentry(struct super_block *sb, struct fid *fid,
724 int fh_len, int fh_type)
726 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
730 static struct dentry *ext3_fh_to_parent(struct super_block *sb, struct fid *fid,
731 int fh_len, int fh_type)
733 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
738 * Try to release metadata pages (indirect blocks, directories) which are
739 * mapped via the block device. Since these pages could have journal heads
740 * which would prevent try_to_free_buffers() from freeing them, we must use
741 * jbd layer's try_to_free_buffers() function to release them.
743 static int bdev_try_to_free_page(struct super_block *sb, struct page *page,
746 journal_t *journal = EXT3_SB(sb)->s_journal;
748 WARN_ON(PageChecked(page));
749 if (!page_has_buffers(page))
752 return journal_try_to_free_buffers(journal, page,
754 return try_to_free_buffers(page);
758 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
759 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
761 static int ext3_write_dquot(struct dquot *dquot);
762 static int ext3_acquire_dquot(struct dquot *dquot);
763 static int ext3_release_dquot(struct dquot *dquot);
764 static int ext3_mark_dquot_dirty(struct dquot *dquot);
765 static int ext3_write_info(struct super_block *sb, int type);
766 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
768 static int ext3_quota_on_mount(struct super_block *sb, int type);
769 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
770 size_t len, loff_t off);
771 static ssize_t ext3_quota_write(struct super_block *sb, int type,
772 const char *data, size_t len, loff_t off);
774 static const struct dquot_operations ext3_quota_operations = {
775 .write_dquot = ext3_write_dquot,
776 .acquire_dquot = ext3_acquire_dquot,
777 .release_dquot = ext3_release_dquot,
778 .mark_dirty = ext3_mark_dquot_dirty,
779 .write_info = ext3_write_info,
780 .alloc_dquot = dquot_alloc,
781 .destroy_dquot = dquot_destroy,
784 static const struct quotactl_ops ext3_qctl_operations = {
785 .quota_on = ext3_quota_on,
786 .quota_off = dquot_quota_off,
787 .quota_sync = dquot_quota_sync,
788 .get_info = dquot_get_dqinfo,
789 .set_info = dquot_set_dqinfo,
790 .get_dqblk = dquot_get_dqblk,
791 .set_dqblk = dquot_set_dqblk
795 static const struct super_operations ext3_sops = {
796 .alloc_inode = ext3_alloc_inode,
797 .destroy_inode = ext3_destroy_inode,
798 .write_inode = ext3_write_inode,
799 .dirty_inode = ext3_dirty_inode,
800 .drop_inode = ext3_drop_inode,
801 .evict_inode = ext3_evict_inode,
802 .put_super = ext3_put_super,
803 .sync_fs = ext3_sync_fs,
804 .freeze_fs = ext3_freeze,
805 .unfreeze_fs = ext3_unfreeze,
806 .statfs = ext3_statfs,
807 .remount_fs = ext3_remount,
808 .show_options = ext3_show_options,
810 .quota_read = ext3_quota_read,
811 .quota_write = ext3_quota_write,
813 .bdev_try_to_free_page = bdev_try_to_free_page,
816 static const struct export_operations ext3_export_ops = {
817 .fh_to_dentry = ext3_fh_to_dentry,
818 .fh_to_parent = ext3_fh_to_parent,
819 .get_parent = ext3_get_parent,
823 Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
824 Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
825 Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
826 Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
827 Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
828 Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
829 Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
830 Opt_data_err_abort, Opt_data_err_ignore,
831 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
832 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota,
833 Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err,
834 Opt_resize, Opt_usrquota, Opt_grpquota
837 static const match_table_t tokens = {
838 {Opt_bsd_df, "bsddf"},
839 {Opt_minix_df, "minixdf"},
840 {Opt_grpid, "grpid"},
841 {Opt_grpid, "bsdgroups"},
842 {Opt_nogrpid, "nogrpid"},
843 {Opt_nogrpid, "sysvgroups"},
844 {Opt_resgid, "resgid=%u"},
845 {Opt_resuid, "resuid=%u"},
847 {Opt_err_cont, "errors=continue"},
848 {Opt_err_panic, "errors=panic"},
849 {Opt_err_ro, "errors=remount-ro"},
850 {Opt_nouid32, "nouid32"},
851 {Opt_nocheck, "nocheck"},
852 {Opt_nocheck, "check=none"},
853 {Opt_debug, "debug"},
854 {Opt_oldalloc, "oldalloc"},
855 {Opt_orlov, "orlov"},
856 {Opt_user_xattr, "user_xattr"},
857 {Opt_nouser_xattr, "nouser_xattr"},
859 {Opt_noacl, "noacl"},
860 {Opt_reservation, "reservation"},
861 {Opt_noreservation, "noreservation"},
862 {Opt_noload, "noload"},
863 {Opt_noload, "norecovery"},
866 {Opt_commit, "commit=%u"},
867 {Opt_journal_update, "journal=update"},
868 {Opt_journal_inum, "journal=%u"},
869 {Opt_journal_dev, "journal_dev=%u"},
870 {Opt_abort, "abort"},
871 {Opt_data_journal, "data=journal"},
872 {Opt_data_ordered, "data=ordered"},
873 {Opt_data_writeback, "data=writeback"},
874 {Opt_data_err_abort, "data_err=abort"},
875 {Opt_data_err_ignore, "data_err=ignore"},
876 {Opt_offusrjquota, "usrjquota="},
877 {Opt_usrjquota, "usrjquota=%s"},
878 {Opt_offgrpjquota, "grpjquota="},
879 {Opt_grpjquota, "grpjquota=%s"},
880 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
881 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
882 {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
883 {Opt_grpquota, "grpquota"},
884 {Opt_noquota, "noquota"},
885 {Opt_quota, "quota"},
886 {Opt_usrquota, "usrquota"},
887 {Opt_barrier, "barrier=%u"},
888 {Opt_barrier, "barrier"},
889 {Opt_nobarrier, "nobarrier"},
890 {Opt_resize, "resize"},
894 static ext3_fsblk_t get_sb_block(void **data, struct super_block *sb)
896 ext3_fsblk_t sb_block;
897 char *options = (char *) *data;
899 if (!options || strncmp(options, "sb=", 3) != 0)
900 return 1; /* Default location */
902 /*todo: use simple_strtoll with >32bit ext3 */
903 sb_block = simple_strtoul(options, &options, 0);
904 if (*options && *options != ',') {
905 ext3_msg(sb, KERN_ERR, "error: invalid sb specification: %s",
911 *data = (void *) options;
916 static int set_qf_name(struct super_block *sb, int qtype, substring_t *args)
918 struct ext3_sb_info *sbi = EXT3_SB(sb);
921 if (sb_any_quota_loaded(sb) &&
922 !sbi->s_qf_names[qtype]) {
923 ext3_msg(sb, KERN_ERR,
924 "Cannot change journaled "
925 "quota options when quota turned on");
928 qname = match_strdup(args);
930 ext3_msg(sb, KERN_ERR,
931 "Not enough memory for storing quotafile name");
934 if (sbi->s_qf_names[qtype] &&
935 strcmp(sbi->s_qf_names[qtype], qname)) {
936 ext3_msg(sb, KERN_ERR,
937 "%s quota file already specified", QTYPE2NAME(qtype));
941 sbi->s_qf_names[qtype] = qname;
942 if (strchr(sbi->s_qf_names[qtype], '/')) {
943 ext3_msg(sb, KERN_ERR,
944 "quotafile must be on filesystem root");
945 kfree(sbi->s_qf_names[qtype]);
946 sbi->s_qf_names[qtype] = NULL;
949 set_opt(sbi->s_mount_opt, QUOTA);
953 static int clear_qf_name(struct super_block *sb, int qtype) {
955 struct ext3_sb_info *sbi = EXT3_SB(sb);
957 if (sb_any_quota_loaded(sb) &&
958 sbi->s_qf_names[qtype]) {
959 ext3_msg(sb, KERN_ERR, "Cannot change journaled quota options"
960 " when quota turned on");
964 * The space will be released later when all options are confirmed
967 sbi->s_qf_names[qtype] = NULL;
972 static int parse_options (char *options, struct super_block *sb,
973 unsigned int *inum, unsigned long *journal_devnum,
974 ext3_fsblk_t *n_blocks_count, int is_remount)
976 struct ext3_sb_info *sbi = EXT3_SB(sb);
978 substring_t args[MAX_OPT_ARGS];
988 while ((p = strsep (&options, ",")) != NULL) {
993 * Initialize args struct so we know whether arg was
994 * found; some options take optional arguments.
996 args[0].to = args[0].from = 0;
997 token = match_token(p, tokens, args);
1000 clear_opt (sbi->s_mount_opt, MINIX_DF);
1003 set_opt (sbi->s_mount_opt, MINIX_DF);
1006 set_opt (sbi->s_mount_opt, GRPID);
1009 clear_opt (sbi->s_mount_opt, GRPID);
1012 if (match_int(&args[0], &option))
1014 sbi->s_resuid = option;
1017 if (match_int(&args[0], &option))
1019 sbi->s_resgid = option;
1022 /* handled by get_sb_block() instead of here */
1023 /* *sb_block = match_int(&args[0]); */
1026 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
1027 clear_opt (sbi->s_mount_opt, ERRORS_RO);
1028 set_opt (sbi->s_mount_opt, ERRORS_PANIC);
1031 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
1032 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
1033 set_opt (sbi->s_mount_opt, ERRORS_RO);
1036 clear_opt (sbi->s_mount_opt, ERRORS_RO);
1037 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
1038 set_opt (sbi->s_mount_opt, ERRORS_CONT);
1041 set_opt (sbi->s_mount_opt, NO_UID32);
1044 clear_opt (sbi->s_mount_opt, CHECK);
1047 set_opt (sbi->s_mount_opt, DEBUG);
1050 ext3_msg(sb, KERN_WARNING,
1051 "Ignoring deprecated oldalloc option");
1054 ext3_msg(sb, KERN_WARNING,
1055 "Ignoring deprecated orlov option");
1057 #ifdef CONFIG_EXT3_FS_XATTR
1058 case Opt_user_xattr:
1059 set_opt (sbi->s_mount_opt, XATTR_USER);
1061 case Opt_nouser_xattr:
1062 clear_opt (sbi->s_mount_opt, XATTR_USER);
1065 case Opt_user_xattr:
1066 case Opt_nouser_xattr:
1067 ext3_msg(sb, KERN_INFO,
1068 "(no)user_xattr options not supported");
1071 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1073 set_opt(sbi->s_mount_opt, POSIX_ACL);
1076 clear_opt(sbi->s_mount_opt, POSIX_ACL);
1081 ext3_msg(sb, KERN_INFO,
1082 "(no)acl options not supported");
1085 case Opt_reservation:
1086 set_opt(sbi->s_mount_opt, RESERVATION);
1088 case Opt_noreservation:
1089 clear_opt(sbi->s_mount_opt, RESERVATION);
1091 case Opt_journal_update:
1093 /* Eventually we will want to be able to create
1094 a journal file here. For now, only allow the
1095 user to specify an existing inode to be the
1098 ext3_msg(sb, KERN_ERR, "error: cannot specify "
1099 "journal on remount");
1102 set_opt (sbi->s_mount_opt, UPDATE_JOURNAL);
1104 case Opt_journal_inum:
1106 ext3_msg(sb, KERN_ERR, "error: cannot specify "
1107 "journal on remount");
1110 if (match_int(&args[0], &option))
1114 case Opt_journal_dev:
1116 ext3_msg(sb, KERN_ERR, "error: cannot specify "
1117 "journal on remount");
1120 if (match_int(&args[0], &option))
1122 *journal_devnum = option;
1125 set_opt (sbi->s_mount_opt, NOLOAD);
1128 if (match_int(&args[0], &option))
1133 option = JBD_DEFAULT_MAX_COMMIT_AGE;
1134 sbi->s_commit_interval = HZ * option;
1136 case Opt_data_journal:
1137 data_opt = EXT3_MOUNT_JOURNAL_DATA;
1139 case Opt_data_ordered:
1140 data_opt = EXT3_MOUNT_ORDERED_DATA;
1142 case Opt_data_writeback:
1143 data_opt = EXT3_MOUNT_WRITEBACK_DATA;
1146 if (test_opt(sb, DATA_FLAGS) == data_opt)
1148 ext3_msg(sb, KERN_ERR,
1149 "error: cannot change "
1150 "data mode on remount. The filesystem "
1151 "is mounted in data=%s mode and you "
1152 "try to remount it in data=%s mode.",
1153 data_mode_string(test_opt(sb,
1155 data_mode_string(data_opt));
1158 clear_opt(sbi->s_mount_opt, DATA_FLAGS);
1159 sbi->s_mount_opt |= data_opt;
1162 case Opt_data_err_abort:
1163 set_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1165 case Opt_data_err_ignore:
1166 clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT);
1170 if (!set_qf_name(sb, USRQUOTA, &args[0]))
1174 if (!set_qf_name(sb, GRPQUOTA, &args[0]))
1177 case Opt_offusrjquota:
1178 if (!clear_qf_name(sb, USRQUOTA))
1181 case Opt_offgrpjquota:
1182 if (!clear_qf_name(sb, GRPQUOTA))
1185 case Opt_jqfmt_vfsold:
1186 qfmt = QFMT_VFS_OLD;
1188 case Opt_jqfmt_vfsv0:
1191 case Opt_jqfmt_vfsv1:
1194 if (sb_any_quota_loaded(sb) &&
1195 sbi->s_jquota_fmt != qfmt) {
1196 ext3_msg(sb, KERN_ERR, "error: cannot change "
1197 "journaled quota options when "
1198 "quota turned on.");
1201 sbi->s_jquota_fmt = qfmt;
1205 set_opt(sbi->s_mount_opt, QUOTA);
1206 set_opt(sbi->s_mount_opt, USRQUOTA);
1209 set_opt(sbi->s_mount_opt, QUOTA);
1210 set_opt(sbi->s_mount_opt, GRPQUOTA);
1213 if (sb_any_quota_loaded(sb)) {
1214 ext3_msg(sb, KERN_ERR, "error: cannot change "
1215 "quota options when quota turned on.");
1218 clear_opt(sbi->s_mount_opt, QUOTA);
1219 clear_opt(sbi->s_mount_opt, USRQUOTA);
1220 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1226 ext3_msg(sb, KERN_ERR,
1227 "error: quota options not supported.");
1231 case Opt_offusrjquota:
1232 case Opt_offgrpjquota:
1233 case Opt_jqfmt_vfsold:
1234 case Opt_jqfmt_vfsv0:
1235 case Opt_jqfmt_vfsv1:
1236 ext3_msg(sb, KERN_ERR,
1237 "error: journaled quota options not "
1244 set_opt(sbi->s_mount_opt, ABORT);
1247 clear_opt(sbi->s_mount_opt, BARRIER);
1251 if (match_int(&args[0], &option))
1254 option = 1; /* No argument, default to 1 */
1256 set_opt(sbi->s_mount_opt, BARRIER);
1258 clear_opt(sbi->s_mount_opt, BARRIER);
1264 ext3_msg(sb, KERN_ERR,
1265 "error: resize option only available "
1269 if (match_int(&args[0], &option) != 0)
1271 *n_blocks_count = option;
1274 ext3_msg(sb, KERN_WARNING,
1275 "warning: ignoring deprecated nobh option");
1278 ext3_msg(sb, KERN_WARNING,
1279 "warning: ignoring deprecated bh option");
1282 ext3_msg(sb, KERN_ERR,
1283 "error: unrecognized mount option \"%s\" "
1284 "or missing value", p);
1289 if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
1290 if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA])
1291 clear_opt(sbi->s_mount_opt, USRQUOTA);
1292 if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA])
1293 clear_opt(sbi->s_mount_opt, GRPQUOTA);
1295 if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) {
1296 ext3_msg(sb, KERN_ERR, "error: old and new quota "
1301 if (!sbi->s_jquota_fmt) {
1302 ext3_msg(sb, KERN_ERR, "error: journaled quota format "
1311 static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es,
1314 struct ext3_sb_info *sbi = EXT3_SB(sb);
1317 if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) {
1318 ext3_msg(sb, KERN_ERR,
1319 "error: revision level too high, "
1320 "forcing read-only mode");
1325 if (!(sbi->s_mount_state & EXT3_VALID_FS))
1326 ext3_msg(sb, KERN_WARNING,
1327 "warning: mounting unchecked fs, "
1328 "running e2fsck is recommended");
1329 else if ((sbi->s_mount_state & EXT3_ERROR_FS))
1330 ext3_msg(sb, KERN_WARNING,
1331 "warning: mounting fs with errors, "
1332 "running e2fsck is recommended");
1333 else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 &&
1334 le16_to_cpu(es->s_mnt_count) >=
1335 le16_to_cpu(es->s_max_mnt_count))
1336 ext3_msg(sb, KERN_WARNING,
1337 "warning: maximal mount count reached, "
1338 "running e2fsck is recommended");
1339 else if (le32_to_cpu(es->s_checkinterval) &&
1340 (le32_to_cpu(es->s_lastcheck) +
1341 le32_to_cpu(es->s_checkinterval) <= get_seconds()))
1342 ext3_msg(sb, KERN_WARNING,
1343 "warning: checktime reached, "
1344 "running e2fsck is recommended");
1346 /* @@@ We _will_ want to clear the valid bit if we find
1347 inconsistencies, to force a fsck at reboot. But for
1348 a plain journaled filesystem we can keep it set as
1349 valid forever! :) */
1350 es->s_state &= cpu_to_le16(~EXT3_VALID_FS);
1352 if (!le16_to_cpu(es->s_max_mnt_count))
1353 es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT);
1354 le16_add_cpu(&es->s_mnt_count, 1);
1355 es->s_mtime = cpu_to_le32(get_seconds());
1356 ext3_update_dynamic_rev(sb);
1357 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
1359 ext3_commit_super(sb, es, 1);
1360 if (test_opt(sb, DEBUG))
1361 ext3_msg(sb, KERN_INFO, "[bs=%lu, gc=%lu, "
1362 "bpg=%lu, ipg=%lu, mo=%04lx]",
1364 sbi->s_groups_count,
1365 EXT3_BLOCKS_PER_GROUP(sb),
1366 EXT3_INODES_PER_GROUP(sb),
1369 if (EXT3_SB(sb)->s_journal->j_inode == NULL) {
1370 char b[BDEVNAME_SIZE];
1371 ext3_msg(sb, KERN_INFO, "using external journal on %s",
1372 bdevname(EXT3_SB(sb)->s_journal->j_dev, b));
1374 ext3_msg(sb, KERN_INFO, "using internal journal");
1376 cleancache_init_fs(sb);
1380 /* Called at mount-time, super-block is locked */
1381 static int ext3_check_descriptors(struct super_block *sb)
1383 struct ext3_sb_info *sbi = EXT3_SB(sb);
1386 ext3_debug ("Checking group descriptors");
1388 for (i = 0; i < sbi->s_groups_count; i++) {
1389 struct ext3_group_desc *gdp = ext3_get_group_desc(sb, i, NULL);
1390 ext3_fsblk_t first_block = ext3_group_first_block_no(sb, i);
1391 ext3_fsblk_t last_block;
1393 if (i == sbi->s_groups_count - 1)
1394 last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1;
1396 last_block = first_block +
1397 (EXT3_BLOCKS_PER_GROUP(sb) - 1);
1399 if (le32_to_cpu(gdp->bg_block_bitmap) < first_block ||
1400 le32_to_cpu(gdp->bg_block_bitmap) > last_block)
1402 ext3_error (sb, "ext3_check_descriptors",
1403 "Block bitmap for group %d"
1404 " not in group (block %lu)!",
1406 le32_to_cpu(gdp->bg_block_bitmap));
1409 if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block ||
1410 le32_to_cpu(gdp->bg_inode_bitmap) > last_block)
1412 ext3_error (sb, "ext3_check_descriptors",
1413 "Inode bitmap for group %d"
1414 " not in group (block %lu)!",
1416 le32_to_cpu(gdp->bg_inode_bitmap));
1419 if (le32_to_cpu(gdp->bg_inode_table) < first_block ||
1420 le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 >
1423 ext3_error (sb, "ext3_check_descriptors",
1424 "Inode table for group %d"
1425 " not in group (block %lu)!",
1427 le32_to_cpu(gdp->bg_inode_table));
1432 sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb));
1433 sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb));
1438 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1439 * the superblock) which were deleted from all directories, but held open by
1440 * a process at the time of a crash. We walk the list and try to delete these
1441 * inodes at recovery time (only with a read-write filesystem).
1443 * In order to keep the orphan inode chain consistent during traversal (in
1444 * case of crash during recovery), we link each inode into the superblock
1445 * orphan list_head and handle it the same way as an inode deletion during
1446 * normal operation (which journals the operations for us).
1448 * We only do an iget() and an iput() on each inode, which is very safe if we
1449 * accidentally point at an in-use or already deleted inode. The worst that
1450 * can happen in this case is that we get a "bit already cleared" message from
1451 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1452 * e2fsck was run on this filesystem, and it must have already done the orphan
1453 * inode cleanup for us, so we can safely abort without any further action.
1455 static void ext3_orphan_cleanup (struct super_block * sb,
1456 struct ext3_super_block * es)
1458 unsigned int s_flags = sb->s_flags;
1459 int nr_orphans = 0, nr_truncates = 0;
1463 if (!es->s_last_orphan) {
1464 jbd_debug(4, "no orphan inodes to clean up\n");
1468 if (bdev_read_only(sb->s_bdev)) {
1469 ext3_msg(sb, KERN_ERR, "error: write access "
1470 "unavailable, skipping orphan cleanup.");
1474 /* Check if feature set allows readwrite operations */
1475 if (EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) {
1476 ext3_msg(sb, KERN_INFO, "Skipping orphan cleanup due to "
1477 "unknown ROCOMPAT features");
1481 if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) {
1482 if (es->s_last_orphan)
1483 jbd_debug(1, "Errors on filesystem, "
1484 "clearing orphan list.\n");
1485 es->s_last_orphan = 0;
1486 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1490 if (s_flags & MS_RDONLY) {
1491 ext3_msg(sb, KERN_INFO, "orphan cleanup on readonly fs");
1492 sb->s_flags &= ~MS_RDONLY;
1495 /* Needed for iput() to work correctly and not trash data */
1496 sb->s_flags |= MS_ACTIVE;
1497 /* Turn on quotas so that they are updated correctly */
1498 for (i = 0; i < MAXQUOTAS; i++) {
1499 if (EXT3_SB(sb)->s_qf_names[i]) {
1500 int ret = ext3_quota_on_mount(sb, i);
1502 ext3_msg(sb, KERN_ERR,
1503 "error: cannot turn on journaled "
1509 while (es->s_last_orphan) {
1510 struct inode *inode;
1512 inode = ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan));
1513 if (IS_ERR(inode)) {
1514 es->s_last_orphan = 0;
1518 list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan);
1519 dquot_initialize(inode);
1520 if (inode->i_nlink) {
1522 "%s: truncating inode %lu to %Ld bytes\n",
1523 __func__, inode->i_ino, inode->i_size);
1524 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1525 inode->i_ino, inode->i_size);
1526 ext3_truncate(inode);
1530 "%s: deleting unreferenced inode %lu\n",
1531 __func__, inode->i_ino);
1532 jbd_debug(2, "deleting unreferenced inode %lu\n",
1536 iput(inode); /* The delete magic happens here! */
1539 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1542 ext3_msg(sb, KERN_INFO, "%d orphan inode%s deleted",
1543 PLURAL(nr_orphans));
1545 ext3_msg(sb, KERN_INFO, "%d truncate%s cleaned up",
1546 PLURAL(nr_truncates));
1548 /* Turn quotas off */
1549 for (i = 0; i < MAXQUOTAS; i++) {
1550 if (sb_dqopt(sb)->files[i])
1551 dquot_quota_off(sb, i);
1554 sb->s_flags = s_flags; /* Restore MS_RDONLY status */
1558 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1559 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1560 * We need to be 1 filesystem block less than the 2^32 sector limit.
1562 static loff_t ext3_max_size(int bits)
1564 loff_t res = EXT3_NDIR_BLOCKS;
1568 /* This is calculated to be the largest file size for a
1569 * dense, file such that the total number of
1570 * sectors in the file, including data and all indirect blocks,
1571 * does not exceed 2^32 -1
1572 * __u32 i_blocks representing the total number of
1573 * 512 bytes blocks of the file
1575 upper_limit = (1LL << 32) - 1;
1577 /* total blocks in file system block size */
1578 upper_limit >>= (bits - 9);
1581 /* indirect blocks */
1583 /* double indirect blocks */
1584 meta_blocks += 1 + (1LL << (bits-2));
1585 /* tripple indirect blocks */
1586 meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
1588 upper_limit -= meta_blocks;
1589 upper_limit <<= bits;
1591 res += 1LL << (bits-2);
1592 res += 1LL << (2*(bits-2));
1593 res += 1LL << (3*(bits-2));
1595 if (res > upper_limit)
1598 if (res > MAX_LFS_FILESIZE)
1599 res = MAX_LFS_FILESIZE;
1604 static ext3_fsblk_t descriptor_loc(struct super_block *sb,
1605 ext3_fsblk_t logic_sb_block,
1608 struct ext3_sb_info *sbi = EXT3_SB(sb);
1609 unsigned long bg, first_meta_bg;
1612 first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
1614 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) ||
1616 return (logic_sb_block + nr + 1);
1617 bg = sbi->s_desc_per_block * nr;
1618 if (ext3_bg_has_super(sb, bg))
1620 return (has_super + ext3_group_first_block_no(sb, bg));
1624 static int ext3_fill_super (struct super_block *sb, void *data, int silent)
1626 struct buffer_head * bh;
1627 struct ext3_super_block *es = NULL;
1628 struct ext3_sb_info *sbi;
1630 ext3_fsblk_t sb_block = get_sb_block(&data, sb);
1631 ext3_fsblk_t logic_sb_block;
1632 unsigned long offset = 0;
1633 unsigned int journal_inum = 0;
1634 unsigned long journal_devnum = 0;
1635 unsigned long def_mount_opts;
1646 sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
1650 sbi->s_blockgroup_lock =
1651 kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL);
1652 if (!sbi->s_blockgroup_lock) {
1656 sb->s_fs_info = sbi;
1657 sbi->s_mount_opt = 0;
1658 sbi->s_resuid = EXT3_DEF_RESUID;
1659 sbi->s_resgid = EXT3_DEF_RESGID;
1660 sbi->s_sb_block = sb_block;
1662 blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE);
1664 ext3_msg(sb, KERN_ERR, "error: unable to set blocksize");
1669 * The ext3 superblock will not be buffer aligned for other than 1kB
1670 * block sizes. We need to calculate the offset from buffer start.
1672 if (blocksize != EXT3_MIN_BLOCK_SIZE) {
1673 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1674 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1676 logic_sb_block = sb_block;
1679 if (!(bh = sb_bread(sb, logic_sb_block))) {
1680 ext3_msg(sb, KERN_ERR, "error: unable to read superblock");
1684 * Note: s_es must be initialized as soon as possible because
1685 * some ext3 macro-instructions depend on its value
1687 es = (struct ext3_super_block *) (bh->b_data + offset);
1689 sb->s_magic = le16_to_cpu(es->s_magic);
1690 if (sb->s_magic != EXT3_SUPER_MAGIC)
1693 /* Set defaults before we parse the mount options */
1694 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
1695 if (def_mount_opts & EXT3_DEFM_DEBUG)
1696 set_opt(sbi->s_mount_opt, DEBUG);
1697 if (def_mount_opts & EXT3_DEFM_BSDGROUPS)
1698 set_opt(sbi->s_mount_opt, GRPID);
1699 if (def_mount_opts & EXT3_DEFM_UID16)
1700 set_opt(sbi->s_mount_opt, NO_UID32);
1701 #ifdef CONFIG_EXT3_FS_XATTR
1702 if (def_mount_opts & EXT3_DEFM_XATTR_USER)
1703 set_opt(sbi->s_mount_opt, XATTR_USER);
1705 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1706 if (def_mount_opts & EXT3_DEFM_ACL)
1707 set_opt(sbi->s_mount_opt, POSIX_ACL);
1709 if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA)
1710 set_opt(sbi->s_mount_opt, JOURNAL_DATA);
1711 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED)
1712 set_opt(sbi->s_mount_opt, ORDERED_DATA);
1713 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK)
1714 set_opt(sbi->s_mount_opt, WRITEBACK_DATA);
1716 if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC)
1717 set_opt(sbi->s_mount_opt, ERRORS_PANIC);
1718 else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_CONTINUE)
1719 set_opt(sbi->s_mount_opt, ERRORS_CONT);
1721 set_opt(sbi->s_mount_opt, ERRORS_RO);
1723 sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
1724 sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
1726 /* enable barriers by default */
1727 set_opt(sbi->s_mount_opt, BARRIER);
1728 set_opt(sbi->s_mount_opt, RESERVATION);
1730 if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
1734 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1735 (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0);
1737 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV &&
1738 (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) ||
1739 EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
1740 EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U)))
1741 ext3_msg(sb, KERN_WARNING,
1742 "warning: feature flags set on rev 0 fs, "
1743 "running e2fsck is recommended");
1745 * Check feature flags regardless of the revision level, since we
1746 * previously didn't change the revision level when setting the flags,
1747 * so there is a chance incompat flags are set on a rev 0 filesystem.
1749 features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP);
1751 ext3_msg(sb, KERN_ERR,
1752 "error: couldn't mount because of unsupported "
1753 "optional features (%x)", le32_to_cpu(features));
1756 features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP);
1757 if (!(sb->s_flags & MS_RDONLY) && features) {
1758 ext3_msg(sb, KERN_ERR,
1759 "error: couldn't mount RDWR because of unsupported "
1760 "optional features (%x)", le32_to_cpu(features));
1763 blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
1765 if (blocksize < EXT3_MIN_BLOCK_SIZE ||
1766 blocksize > EXT3_MAX_BLOCK_SIZE) {
1767 ext3_msg(sb, KERN_ERR,
1768 "error: couldn't mount because of unsupported "
1769 "filesystem blocksize %d", blocksize);
1773 hblock = bdev_logical_block_size(sb->s_bdev);
1774 if (sb->s_blocksize != blocksize) {
1776 * Make sure the blocksize for the filesystem is larger
1777 * than the hardware sectorsize for the machine.
1779 if (blocksize < hblock) {
1780 ext3_msg(sb, KERN_ERR,
1781 "error: fsblocksize %d too small for "
1782 "hardware sectorsize %d", blocksize, hblock);
1787 if (!sb_set_blocksize(sb, blocksize)) {
1788 ext3_msg(sb, KERN_ERR,
1789 "error: bad blocksize %d", blocksize);
1792 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1793 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1794 bh = sb_bread(sb, logic_sb_block);
1796 ext3_msg(sb, KERN_ERR,
1797 "error: can't read superblock on 2nd try");
1800 es = (struct ext3_super_block *)(bh->b_data + offset);
1802 if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) {
1803 ext3_msg(sb, KERN_ERR,
1804 "error: magic mismatch");
1809 sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits);
1811 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) {
1812 sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE;
1813 sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO;
1815 sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
1816 sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
1817 if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) ||
1818 (!is_power_of_2(sbi->s_inode_size)) ||
1819 (sbi->s_inode_size > blocksize)) {
1820 ext3_msg(sb, KERN_ERR,
1821 "error: unsupported inode size: %d",
1826 sbi->s_frag_size = EXT3_MIN_FRAG_SIZE <<
1827 le32_to_cpu(es->s_log_frag_size);
1828 if (blocksize != sbi->s_frag_size) {
1829 ext3_msg(sb, KERN_ERR,
1830 "error: fragsize %lu != blocksize %u (unsupported)",
1831 sbi->s_frag_size, blocksize);
1834 sbi->s_frags_per_block = 1;
1835 sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
1836 sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
1837 sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
1838 if (EXT3_INODE_SIZE(sb) == 0 || EXT3_INODES_PER_GROUP(sb) == 0)
1840 sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb);
1841 if (sbi->s_inodes_per_block == 0)
1843 sbi->s_itb_per_group = sbi->s_inodes_per_group /
1844 sbi->s_inodes_per_block;
1845 sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc);
1847 sbi->s_mount_state = le16_to_cpu(es->s_state);
1848 sbi->s_addr_per_block_bits = ilog2(EXT3_ADDR_PER_BLOCK(sb));
1849 sbi->s_desc_per_block_bits = ilog2(EXT3_DESC_PER_BLOCK(sb));
1850 for (i=0; i < 4; i++)
1851 sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
1852 sbi->s_def_hash_version = es->s_def_hash_version;
1853 i = le32_to_cpu(es->s_flags);
1854 if (i & EXT2_FLAGS_UNSIGNED_HASH)
1855 sbi->s_hash_unsigned = 3;
1856 else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) {
1857 #ifdef __CHAR_UNSIGNED__
1858 es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH);
1859 sbi->s_hash_unsigned = 3;
1861 es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH);
1865 if (sbi->s_blocks_per_group > blocksize * 8) {
1866 ext3_msg(sb, KERN_ERR,
1867 "#blocks per group too big: %lu",
1868 sbi->s_blocks_per_group);
1871 if (sbi->s_frags_per_group > blocksize * 8) {
1872 ext3_msg(sb, KERN_ERR,
1873 "error: #fragments per group too big: %lu",
1874 sbi->s_frags_per_group);
1877 if (sbi->s_inodes_per_group > blocksize * 8) {
1878 ext3_msg(sb, KERN_ERR,
1879 "error: #inodes per group too big: %lu",
1880 sbi->s_inodes_per_group);
1884 err = generic_check_addressable(sb->s_blocksize_bits,
1885 le32_to_cpu(es->s_blocks_count));
1887 ext3_msg(sb, KERN_ERR,
1888 "error: filesystem is too large to mount safely");
1889 if (sizeof(sector_t) < 8)
1890 ext3_msg(sb, KERN_ERR,
1891 "error: CONFIG_LBDAF not enabled");
1896 if (EXT3_BLOCKS_PER_GROUP(sb) == 0)
1898 sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
1899 le32_to_cpu(es->s_first_data_block) - 1)
1900 / EXT3_BLOCKS_PER_GROUP(sb)) + 1;
1901 db_count = DIV_ROUND_UP(sbi->s_groups_count, EXT3_DESC_PER_BLOCK(sb));
1902 sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
1904 if (sbi->s_group_desc == NULL) {
1905 ext3_msg(sb, KERN_ERR,
1906 "error: not enough memory");
1911 bgl_lock_init(sbi->s_blockgroup_lock);
1913 for (i = 0; i < db_count; i++) {
1914 block = descriptor_loc(sb, logic_sb_block, i);
1915 sbi->s_group_desc[i] = sb_bread(sb, block);
1916 if (!sbi->s_group_desc[i]) {
1917 ext3_msg(sb, KERN_ERR,
1918 "error: can't read group descriptor %d", i);
1923 if (!ext3_check_descriptors (sb)) {
1924 ext3_msg(sb, KERN_ERR,
1925 "error: group descriptors corrupted");
1928 sbi->s_gdb_count = db_count;
1929 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1930 spin_lock_init(&sbi->s_next_gen_lock);
1932 /* per fileystem reservation list head & lock */
1933 spin_lock_init(&sbi->s_rsv_window_lock);
1934 sbi->s_rsv_window_root = RB_ROOT;
1935 /* Add a single, static dummy reservation to the start of the
1936 * reservation window list --- it gives us a placeholder for
1937 * append-at-start-of-list which makes the allocation logic
1938 * _much_ simpler. */
1939 sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1940 sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1941 sbi->s_rsv_window_head.rsv_alloc_hit = 0;
1942 sbi->s_rsv_window_head.rsv_goal_size = 0;
1943 ext3_rsv_window_add(sb, &sbi->s_rsv_window_head);
1946 * set up enough so that it can read an inode
1948 sb->s_op = &ext3_sops;
1949 sb->s_export_op = &ext3_export_ops;
1950 sb->s_xattr = ext3_xattr_handlers;
1952 sb->s_qcop = &ext3_qctl_operations;
1953 sb->dq_op = &ext3_quota_operations;
1955 memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid));
1956 INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
1957 mutex_init(&sbi->s_orphan_lock);
1958 mutex_init(&sbi->s_resize_lock);
1962 needs_recovery = (es->s_last_orphan != 0 ||
1963 EXT3_HAS_INCOMPAT_FEATURE(sb,
1964 EXT3_FEATURE_INCOMPAT_RECOVER));
1967 * The first inode we look at is the journal inode. Don't try
1968 * root first: it may be modified in the journal!
1970 if (!test_opt(sb, NOLOAD) &&
1971 EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1972 if (ext3_load_journal(sb, es, journal_devnum))
1974 } else if (journal_inum) {
1975 if (ext3_create_journal(sb, es, journal_inum))
1979 ext3_msg(sb, KERN_ERR,
1980 "error: no journal found. "
1981 "mounting ext3 over ext2?");
1984 err = percpu_counter_init(&sbi->s_freeblocks_counter,
1985 ext3_count_free_blocks(sb));
1987 err = percpu_counter_init(&sbi->s_freeinodes_counter,
1988 ext3_count_free_inodes(sb));
1991 err = percpu_counter_init(&sbi->s_dirs_counter,
1992 ext3_count_dirs(sb));
1995 ext3_msg(sb, KERN_ERR, "error: insufficient memory");
2000 /* We have now updated the journal if required, so we can
2001 * validate the data journaling mode. */
2002 switch (test_opt(sb, DATA_FLAGS)) {
2004 /* No mode set, assume a default based on the journal
2005 capabilities: ORDERED_DATA if the journal can
2006 cope, else JOURNAL_DATA */
2007 if (journal_check_available_features
2008 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE))
2009 set_opt(sbi->s_mount_opt, DEFAULT_DATA_MODE);
2011 set_opt(sbi->s_mount_opt, JOURNAL_DATA);
2014 case EXT3_MOUNT_ORDERED_DATA:
2015 case EXT3_MOUNT_WRITEBACK_DATA:
2016 if (!journal_check_available_features
2017 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) {
2018 ext3_msg(sb, KERN_ERR,
2019 "error: journal does not support "
2020 "requested data journaling mode");
2028 * The journal_load will have done any necessary log recovery,
2029 * so we can safely mount the rest of the filesystem now.
2032 root = ext3_iget(sb, EXT3_ROOT_INO);
2034 ext3_msg(sb, KERN_ERR, "error: get root inode failed");
2035 ret = PTR_ERR(root);
2038 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
2040 ext3_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck");
2043 sb->s_root = d_alloc_root(root);
2045 ext3_msg(sb, KERN_ERR, "error: get root dentry failed");
2051 ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
2053 EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS;
2054 ext3_orphan_cleanup(sb, es);
2055 EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS;
2057 ext3_msg(sb, KERN_INFO, "recovery complete");
2058 ext3_mark_recovery_complete(sb, es);
2059 ext3_msg(sb, KERN_INFO, "mounted filesystem with %s data mode",
2060 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal":
2061 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered":
2068 ext3_msg(sb, KERN_INFO,
2069 "error: can't find ext3 filesystem on dev %s.",
2074 percpu_counter_destroy(&sbi->s_freeblocks_counter);
2075 percpu_counter_destroy(&sbi->s_freeinodes_counter);
2076 percpu_counter_destroy(&sbi->s_dirs_counter);
2077 journal_destroy(sbi->s_journal);
2079 for (i = 0; i < db_count; i++)
2080 brelse(sbi->s_group_desc[i]);
2081 kfree(sbi->s_group_desc);
2084 for (i = 0; i < MAXQUOTAS; i++)
2085 kfree(sbi->s_qf_names[i]);
2087 ext3_blkdev_remove(sbi);
2090 sb->s_fs_info = NULL;
2091 kfree(sbi->s_blockgroup_lock);
2097 * Setup any per-fs journal parameters now. We'll do this both on
2098 * initial mount, once the journal has been initialised but before we've
2099 * done any recovery; and again on any subsequent remount.
2101 static void ext3_init_journal_params(struct super_block *sb, journal_t *journal)
2103 struct ext3_sb_info *sbi = EXT3_SB(sb);
2105 if (sbi->s_commit_interval)
2106 journal->j_commit_interval = sbi->s_commit_interval;
2107 /* We could also set up an ext3-specific default for the commit
2108 * interval here, but for now we'll just fall back to the jbd
2111 spin_lock(&journal->j_state_lock);
2112 if (test_opt(sb, BARRIER))
2113 journal->j_flags |= JFS_BARRIER;
2115 journal->j_flags &= ~JFS_BARRIER;
2116 if (test_opt(sb, DATA_ERR_ABORT))
2117 journal->j_flags |= JFS_ABORT_ON_SYNCDATA_ERR;
2119 journal->j_flags &= ~JFS_ABORT_ON_SYNCDATA_ERR;
2120 spin_unlock(&journal->j_state_lock);
2123 static journal_t *ext3_get_journal(struct super_block *sb,
2124 unsigned int journal_inum)
2126 struct inode *journal_inode;
2129 /* First, test for the existence of a valid inode on disk. Bad
2130 * things happen if we iget() an unused inode, as the subsequent
2131 * iput() will try to delete it. */
2133 journal_inode = ext3_iget(sb, journal_inum);
2134 if (IS_ERR(journal_inode)) {
2135 ext3_msg(sb, KERN_ERR, "error: no journal found");
2138 if (!journal_inode->i_nlink) {
2139 make_bad_inode(journal_inode);
2140 iput(journal_inode);
2141 ext3_msg(sb, KERN_ERR, "error: journal inode is deleted");
2145 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2146 journal_inode, journal_inode->i_size);
2147 if (!S_ISREG(journal_inode->i_mode)) {
2148 ext3_msg(sb, KERN_ERR, "error: invalid journal inode");
2149 iput(journal_inode);
2153 journal = journal_init_inode(journal_inode);
2155 ext3_msg(sb, KERN_ERR, "error: could not load journal inode");
2156 iput(journal_inode);
2159 journal->j_private = sb;
2160 ext3_init_journal_params(sb, journal);
2164 static journal_t *ext3_get_dev_journal(struct super_block *sb,
2167 struct buffer_head * bh;
2171 int hblock, blocksize;
2172 ext3_fsblk_t sb_block;
2173 unsigned long offset;
2174 struct ext3_super_block * es;
2175 struct block_device *bdev;
2177 bdev = ext3_blkdev_get(j_dev, sb);
2181 blocksize = sb->s_blocksize;
2182 hblock = bdev_logical_block_size(bdev);
2183 if (blocksize < hblock) {
2184 ext3_msg(sb, KERN_ERR,
2185 "error: blocksize too small for journal device");
2189 sb_block = EXT3_MIN_BLOCK_SIZE / blocksize;
2190 offset = EXT3_MIN_BLOCK_SIZE % blocksize;
2191 set_blocksize(bdev, blocksize);
2192 if (!(bh = __bread(bdev, sb_block, blocksize))) {
2193 ext3_msg(sb, KERN_ERR, "error: couldn't read superblock of "
2194 "external journal");
2198 es = (struct ext3_super_block *) (bh->b_data + offset);
2199 if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) ||
2200 !(le32_to_cpu(es->s_feature_incompat) &
2201 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
2202 ext3_msg(sb, KERN_ERR, "error: external journal has "
2208 if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
2209 ext3_msg(sb, KERN_ERR, "error: journal UUID does not match");
2214 len = le32_to_cpu(es->s_blocks_count);
2215 start = sb_block + 1;
2216 brelse(bh); /* we're done with the superblock */
2218 journal = journal_init_dev(bdev, sb->s_bdev,
2219 start, len, blocksize);
2221 ext3_msg(sb, KERN_ERR,
2222 "error: failed to create device journal");
2225 journal->j_private = sb;
2226 ll_rw_block(READ, 1, &journal->j_sb_buffer);
2227 wait_on_buffer(journal->j_sb_buffer);
2228 if (!buffer_uptodate(journal->j_sb_buffer)) {
2229 ext3_msg(sb, KERN_ERR, "I/O error on journal device");
2232 if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {
2233 ext3_msg(sb, KERN_ERR,
2234 "error: external journal has more than one "
2235 "user (unsupported) - %d",
2236 be32_to_cpu(journal->j_superblock->s_nr_users));
2239 EXT3_SB(sb)->journal_bdev = bdev;
2240 ext3_init_journal_params(sb, journal);
2243 journal_destroy(journal);
2245 ext3_blkdev_put(bdev);
2249 static int ext3_load_journal(struct super_block *sb,
2250 struct ext3_super_block *es,
2251 unsigned long journal_devnum)
2254 unsigned int journal_inum = le32_to_cpu(es->s_journal_inum);
2257 int really_read_only;
2259 if (journal_devnum &&
2260 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2261 ext3_msg(sb, KERN_INFO, "external journal device major/minor "
2262 "numbers have changed");
2263 journal_dev = new_decode_dev(journal_devnum);
2265 journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));
2267 really_read_only = bdev_read_only(sb->s_bdev);
2270 * Are we loading a blank journal or performing recovery after a
2271 * crash? For recovery, we need to check in advance whether we
2272 * can get read-write access to the device.
2275 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) {
2276 if (sb->s_flags & MS_RDONLY) {
2277 ext3_msg(sb, KERN_INFO,
2278 "recovery required on readonly filesystem");
2279 if (really_read_only) {
2280 ext3_msg(sb, KERN_ERR, "error: write access "
2281 "unavailable, cannot proceed");
2284 ext3_msg(sb, KERN_INFO,
2285 "write access will be enabled during recovery");
2289 if (journal_inum && journal_dev) {
2290 ext3_msg(sb, KERN_ERR, "error: filesystem has both journal "
2291 "and inode journals");
2296 if (!(journal = ext3_get_journal(sb, journal_inum)))
2299 if (!(journal = ext3_get_dev_journal(sb, journal_dev)))
2303 if (!(journal->j_flags & JFS_BARRIER))
2304 printk(KERN_INFO "EXT3-fs: barriers not enabled\n");
2306 if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) {
2307 err = journal_update_format(journal);
2309 ext3_msg(sb, KERN_ERR, "error updating journal");
2310 journal_destroy(journal);
2315 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER))
2316 err = journal_wipe(journal, !really_read_only);
2318 err = journal_load(journal);
2321 ext3_msg(sb, KERN_ERR, "error loading journal");
2322 journal_destroy(journal);
2326 EXT3_SB(sb)->s_journal = journal;
2327 ext3_clear_journal_err(sb, es);
2329 if (!really_read_only && journal_devnum &&
2330 journal_devnum != le32_to_cpu(es->s_journal_dev)) {
2331 es->s_journal_dev = cpu_to_le32(journal_devnum);
2333 /* Make sure we flush the recovery flag to disk. */
2334 ext3_commit_super(sb, es, 1);
2340 static int ext3_create_journal(struct super_block *sb,
2341 struct ext3_super_block *es,
2342 unsigned int journal_inum)
2347 if (sb->s_flags & MS_RDONLY) {
2348 ext3_msg(sb, KERN_ERR,
2349 "error: readonly filesystem when trying to "
2354 journal = ext3_get_journal(sb, journal_inum);
2358 ext3_msg(sb, KERN_INFO, "creating new journal on inode %u",
2361 err = journal_create(journal);
2363 ext3_msg(sb, KERN_ERR, "error creating journal");
2364 journal_destroy(journal);
2368 EXT3_SB(sb)->s_journal = journal;
2370 ext3_update_dynamic_rev(sb);
2371 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2372 EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL);
2374 es->s_journal_inum = cpu_to_le32(journal_inum);
2376 /* Make sure we flush the recovery flag to disk. */
2377 ext3_commit_super(sb, es, 1);
2382 static int ext3_commit_super(struct super_block *sb,
2383 struct ext3_super_block *es,
2386 struct buffer_head *sbh = EXT3_SB(sb)->s_sbh;
2392 if (buffer_write_io_error(sbh)) {
2394 * Oh, dear. A previous attempt to write the
2395 * superblock failed. This could happen because the
2396 * USB device was yanked out. Or it could happen to
2397 * be a transient write error and maybe the block will
2398 * be remapped. Nothing we can do but to retry the
2399 * write and hope for the best.
2401 ext3_msg(sb, KERN_ERR, "previous I/O error to "
2402 "superblock detected");
2403 clear_buffer_write_io_error(sbh);
2404 set_buffer_uptodate(sbh);
2407 * If the file system is mounted read-only, don't update the
2408 * superblock write time. This avoids updating the superblock
2409 * write time when we are mounting the root file system
2410 * read/only but we need to replay the journal; at that point,
2411 * for people who are east of GMT and who make their clock
2412 * tick in localtime for Windows bug-for-bug compatibility,
2413 * the clock is set in the future, and this will cause e2fsck
2414 * to complain and force a full file system check.
2416 if (!(sb->s_flags & MS_RDONLY))
2417 es->s_wtime = cpu_to_le32(get_seconds());
2418 es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb));
2419 es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb));
2420 BUFFER_TRACE(sbh, "marking dirty");
2421 mark_buffer_dirty(sbh);
2423 error = sync_dirty_buffer(sbh);
2424 if (buffer_write_io_error(sbh)) {
2425 ext3_msg(sb, KERN_ERR, "I/O error while writing "
2427 clear_buffer_write_io_error(sbh);
2428 set_buffer_uptodate(sbh);
2436 * Have we just finished recovery? If so, and if we are mounting (or
2437 * remounting) the filesystem readonly, then we will end up with a
2438 * consistent fs on disk. Record that fact.
2440 static void ext3_mark_recovery_complete(struct super_block * sb,
2441 struct ext3_super_block * es)
2443 journal_t *journal = EXT3_SB(sb)->s_journal;
2445 journal_lock_updates(journal);
2446 if (journal_flush(journal) < 0)
2449 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) &&
2450 sb->s_flags & MS_RDONLY) {
2451 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2452 ext3_commit_super(sb, es, 1);
2456 journal_unlock_updates(journal);
2460 * If we are mounting (or read-write remounting) a filesystem whose journal
2461 * has recorded an error from a previous lifetime, move that error to the
2462 * main filesystem now.
2464 static void ext3_clear_journal_err(struct super_block *sb,
2465 struct ext3_super_block *es)
2471 journal = EXT3_SB(sb)->s_journal;
2474 * Now check for any error status which may have been recorded in the
2475 * journal by a prior ext3_error() or ext3_abort()
2478 j_errno = journal_errno(journal);
2482 errstr = ext3_decode_error(sb, j_errno, nbuf);
2483 ext3_warning(sb, __func__, "Filesystem error recorded "
2484 "from previous mount: %s", errstr);
2485 ext3_warning(sb, __func__, "Marking fs in need of "
2486 "filesystem check.");
2488 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
2489 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
2490 ext3_commit_super (sb, es, 1);
2492 journal_clear_err(journal);
2497 * Force the running and committing transactions to commit,
2498 * and wait on the commit.
2500 int ext3_force_commit(struct super_block *sb)
2505 if (sb->s_flags & MS_RDONLY)
2508 journal = EXT3_SB(sb)->s_journal;
2509 ret = ext3_journal_force_commit(journal);
2513 static int ext3_sync_fs(struct super_block *sb, int wait)
2517 trace_ext3_sync_fs(sb, wait);
2518 if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) {
2520 log_wait_commit(EXT3_SB(sb)->s_journal, target);
2526 * LVM calls this function before a (read-only) snapshot is created. This
2527 * gives us a chance to flush the journal completely and mark the fs clean.
2529 static int ext3_freeze(struct super_block *sb)
2534 if (!(sb->s_flags & MS_RDONLY)) {
2535 journal = EXT3_SB(sb)->s_journal;
2537 /* Now we set up the journal barrier. */
2538 journal_lock_updates(journal);
2541 * We don't want to clear needs_recovery flag when we failed
2542 * to flush the journal.
2544 error = journal_flush(journal);
2548 /* Journal blocked and flushed, clear needs_recovery flag. */
2549 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2550 error = ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2557 journal_unlock_updates(journal);
2562 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2563 * flag here, even though the filesystem is not technically dirty yet.
2565 static int ext3_unfreeze(struct super_block *sb)
2567 if (!(sb->s_flags & MS_RDONLY)) {
2569 /* Reser the needs_recovery flag before the fs is unlocked. */
2570 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2571 ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2573 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2578 static int ext3_remount (struct super_block * sb, int * flags, char * data)
2580 struct ext3_super_block * es;
2581 struct ext3_sb_info *sbi = EXT3_SB(sb);
2582 ext3_fsblk_t n_blocks_count = 0;
2583 unsigned long old_sb_flags;
2584 struct ext3_mount_options old_opts;
2585 int enable_quota = 0;
2591 /* Store the original options */
2593 old_sb_flags = sb->s_flags;
2594 old_opts.s_mount_opt = sbi->s_mount_opt;
2595 old_opts.s_resuid = sbi->s_resuid;
2596 old_opts.s_resgid = sbi->s_resgid;
2597 old_opts.s_commit_interval = sbi->s_commit_interval;
2599 old_opts.s_jquota_fmt = sbi->s_jquota_fmt;
2600 for (i = 0; i < MAXQUOTAS; i++)
2601 old_opts.s_qf_names[i] = sbi->s_qf_names[i];
2605 * Allow the "check" option to be passed as a remount option.
2607 if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) {
2612 if (test_opt(sb, ABORT))
2613 ext3_abort(sb, __func__, "Abort forced by user");
2615 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
2616 (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0);
2620 ext3_init_journal_params(sb, sbi->s_journal);
2622 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) ||
2623 n_blocks_count > le32_to_cpu(es->s_blocks_count)) {
2624 if (test_opt(sb, ABORT)) {
2629 if (*flags & MS_RDONLY) {
2630 err = dquot_suspend(sb, -1);
2635 * First of all, the unconditional stuff we have to do
2636 * to disable replay of the journal when we next remount
2638 sb->s_flags |= MS_RDONLY;
2641 * OK, test if we are remounting a valid rw partition
2642 * readonly, and if so set the rdonly flag and then
2643 * mark the partition as valid again.
2645 if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) &&
2646 (sbi->s_mount_state & EXT3_VALID_FS))
2647 es->s_state = cpu_to_le16(sbi->s_mount_state);
2649 ext3_mark_recovery_complete(sb, es);
2652 if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb,
2653 ~EXT3_FEATURE_RO_COMPAT_SUPP))) {
2654 ext3_msg(sb, KERN_WARNING,
2655 "warning: couldn't remount RDWR "
2656 "because of unsupported optional "
2657 "features (%x)", le32_to_cpu(ret));
2663 * If we have an unprocessed orphan list hanging
2664 * around from a previously readonly bdev mount,
2665 * require a full umount & mount for now.
2667 if (es->s_last_orphan) {
2668 ext3_msg(sb, KERN_WARNING, "warning: couldn't "
2669 "remount RDWR because of unprocessed "
2670 "orphan inode list. Please "
2671 "umount & mount instead.");
2677 * Mounting a RDONLY partition read-write, so reread
2678 * and store the current valid flag. (It may have
2679 * been changed by e2fsck since we originally mounted
2682 ext3_clear_journal_err(sb, es);
2683 sbi->s_mount_state = le16_to_cpu(es->s_state);
2684 if ((err = ext3_group_extend(sb, es, n_blocks_count)))
2686 if (!ext3_setup_super (sb, es, 0))
2687 sb->s_flags &= ~MS_RDONLY;
2692 /* Release old quota file names */
2693 for (i = 0; i < MAXQUOTAS; i++)
2694 if (old_opts.s_qf_names[i] &&
2695 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2696 kfree(old_opts.s_qf_names[i]);
2701 dquot_resume(sb, -1);
2704 sb->s_flags = old_sb_flags;
2705 sbi->s_mount_opt = old_opts.s_mount_opt;
2706 sbi->s_resuid = old_opts.s_resuid;
2707 sbi->s_resgid = old_opts.s_resgid;
2708 sbi->s_commit_interval = old_opts.s_commit_interval;
2710 sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
2711 for (i = 0; i < MAXQUOTAS; i++) {
2712 if (sbi->s_qf_names[i] &&
2713 old_opts.s_qf_names[i] != sbi->s_qf_names[i])
2714 kfree(sbi->s_qf_names[i]);
2715 sbi->s_qf_names[i] = old_opts.s_qf_names[i];
2722 static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
2724 struct super_block *sb = dentry->d_sb;
2725 struct ext3_sb_info *sbi = EXT3_SB(sb);
2726 struct ext3_super_block *es = sbi->s_es;
2729 if (test_opt(sb, MINIX_DF)) {
2730 sbi->s_overhead_last = 0;
2731 } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) {
2732 unsigned long ngroups = sbi->s_groups_count, i;
2733 ext3_fsblk_t overhead = 0;
2737 * Compute the overhead (FS structures). This is constant
2738 * for a given filesystem unless the number of block groups
2739 * changes so we cache the previous value until it does.
2743 * All of the blocks before first_data_block are
2746 overhead = le32_to_cpu(es->s_first_data_block);
2749 * Add the overhead attributed to the superblock and
2750 * block group descriptors. If the sparse superblocks
2751 * feature is turned on, then not all groups have this.
2753 for (i = 0; i < ngroups; i++) {
2754 overhead += ext3_bg_has_super(sb, i) +
2755 ext3_bg_num_gdb(sb, i);
2760 * Every block group has an inode bitmap, a block
2761 * bitmap, and an inode table.
2763 overhead += ngroups * (2 + sbi->s_itb_per_group);
2764 sbi->s_overhead_last = overhead;
2766 sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count);
2769 buf->f_type = EXT3_SUPER_MAGIC;
2770 buf->f_bsize = sb->s_blocksize;
2771 buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last;
2772 buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter);
2773 buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
2774 if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
2776 buf->f_files = le32_to_cpu(es->s_inodes_count);
2777 buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter);
2778 buf->f_namelen = EXT3_NAME_LEN;
2779 fsid = le64_to_cpup((void *)es->s_uuid) ^
2780 le64_to_cpup((void *)es->s_uuid + sizeof(u64));
2781 buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
2782 buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
2786 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2787 * is locked for write. Otherwise the are possible deadlocks:
2788 * Process 1 Process 2
2789 * ext3_create() quota_sync()
2790 * journal_start() write_dquot()
2791 * dquot_initialize() down(dqio_mutex)
2792 * down(dqio_mutex) journal_start()
2798 static inline struct inode *dquot_to_inode(struct dquot *dquot)
2800 return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
2803 static int ext3_write_dquot(struct dquot *dquot)
2807 struct inode *inode;
2809 inode = dquot_to_inode(dquot);
2810 handle = ext3_journal_start(inode,
2811 EXT3_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2813 return PTR_ERR(handle);
2814 ret = dquot_commit(dquot);
2815 err = ext3_journal_stop(handle);
2821 static int ext3_acquire_dquot(struct dquot *dquot)
2826 handle = ext3_journal_start(dquot_to_inode(dquot),
2827 EXT3_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2829 return PTR_ERR(handle);
2830 ret = dquot_acquire(dquot);
2831 err = ext3_journal_stop(handle);
2837 static int ext3_release_dquot(struct dquot *dquot)
2842 handle = ext3_journal_start(dquot_to_inode(dquot),
2843 EXT3_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2844 if (IS_ERR(handle)) {
2845 /* Release dquot anyway to avoid endless cycle in dqput() */
2846 dquot_release(dquot);
2847 return PTR_ERR(handle);
2849 ret = dquot_release(dquot);
2850 err = ext3_journal_stop(handle);
2856 static int ext3_mark_dquot_dirty(struct dquot *dquot)
2858 /* Are we journaling quotas? */
2859 if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2860 EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2861 dquot_mark_dquot_dirty(dquot);
2862 return ext3_write_dquot(dquot);
2864 return dquot_mark_dquot_dirty(dquot);
2868 static int ext3_write_info(struct super_block *sb, int type)
2873 /* Data block + inode block */
2874 handle = ext3_journal_start(sb->s_root->d_inode, 2);
2876 return PTR_ERR(handle);
2877 ret = dquot_commit_info(sb, type);
2878 err = ext3_journal_stop(handle);
2885 * Turn on quotas during mount time - we need to find
2886 * the quota file and such...
2888 static int ext3_quota_on_mount(struct super_block *sb, int type)
2890 return dquot_quota_on_mount(sb, EXT3_SB(sb)->s_qf_names[type],
2891 EXT3_SB(sb)->s_jquota_fmt, type);
2895 * Standard function to be called on quota_on
2897 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
2902 if (!test_opt(sb, QUOTA))
2905 /* Quotafile not on the same filesystem? */
2906 if (path->mnt->mnt_sb != sb)
2908 /* Journaling quota? */
2909 if (EXT3_SB(sb)->s_qf_names[type]) {
2910 /* Quotafile not of fs root? */
2911 if (path->dentry->d_parent != sb->s_root)
2912 ext3_msg(sb, KERN_WARNING,
2913 "warning: Quota file not on filesystem root. "
2914 "Journaled quota will not work.");
2918 * When we journal data on quota file, we have to flush journal to see
2919 * all updates to the file when we bypass pagecache...
2921 if (ext3_should_journal_data(path->dentry->d_inode)) {
2923 * We don't need to lock updates but journal_flush() could
2924 * otherwise be livelocked...
2926 journal_lock_updates(EXT3_SB(sb)->s_journal);
2927 err = journal_flush(EXT3_SB(sb)->s_journal);
2928 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2933 return dquot_quota_on(sb, type, format_id, path);
2936 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2937 * acquiring the locks... As quota files are never truncated and quota code
2938 * itself serializes the operations (and no one else should touch the files)
2939 * we don't have to be afraid of races */
2940 static ssize_t ext3_quota_read(struct super_block *sb, int type, char *data,
2941 size_t len, loff_t off)
2943 struct inode *inode = sb_dqopt(sb)->files[type];
2944 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2946 int offset = off & (sb->s_blocksize - 1);
2949 struct buffer_head *bh;
2950 loff_t i_size = i_size_read(inode);
2954 if (off+len > i_size)
2957 while (toread > 0) {
2958 tocopy = sb->s_blocksize - offset < toread ?
2959 sb->s_blocksize - offset : toread;
2960 bh = ext3_bread(NULL, inode, blk, 0, &err);
2963 if (!bh) /* A hole? */
2964 memset(data, 0, tocopy);
2966 memcpy(data, bh->b_data+offset, tocopy);
2976 /* Write to quotafile (we know the transaction is already started and has
2977 * enough credits) */
2978 static ssize_t ext3_quota_write(struct super_block *sb, int type,
2979 const char *data, size_t len, loff_t off)
2981 struct inode *inode = sb_dqopt(sb)->files[type];
2982 sector_t blk = off >> EXT3_BLOCK_SIZE_BITS(sb);
2984 int offset = off & (sb->s_blocksize - 1);
2985 int journal_quota = EXT3_SB(sb)->s_qf_names[type] != NULL;
2986 struct buffer_head *bh;
2987 handle_t *handle = journal_current_handle();
2990 ext3_msg(sb, KERN_WARNING,
2991 "warning: quota write (off=%llu, len=%llu)"
2992 " cancelled because transaction is not started.",
2993 (unsigned long long)off, (unsigned long long)len);
2998 * Since we account only one data block in transaction credits,
2999 * then it is impossible to cross a block boundary.
3001 if (sb->s_blocksize - offset < len) {
3002 ext3_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)"
3003 " cancelled because not block aligned",
3004 (unsigned long long)off, (unsigned long long)len);
3007 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
3008 bh = ext3_bread(handle, inode, blk, 1, &err);
3011 if (journal_quota) {
3012 err = ext3_journal_get_write_access(handle, bh);
3019 memcpy(bh->b_data+offset, data, len);
3020 flush_dcache_page(bh->b_page);
3023 err = ext3_journal_dirty_metadata(handle, bh);
3025 /* Always do at least ordered writes for quotas */
3026 err = ext3_journal_dirty_data(handle, bh);
3027 mark_buffer_dirty(bh);
3032 mutex_unlock(&inode->i_mutex);
3035 if (inode->i_size < off + len) {
3036 i_size_write(inode, off + len);
3037 EXT3_I(inode)->i_disksize = inode->i_size;
3040 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
3041 ext3_mark_inode_dirty(handle, inode);
3042 mutex_unlock(&inode->i_mutex);
3048 static struct dentry *ext3_mount(struct file_system_type *fs_type,
3049 int flags, const char *dev_name, void *data)
3051 return mount_bdev(fs_type, flags, dev_name, data, ext3_fill_super);
3054 static struct file_system_type ext3_fs_type = {
3055 .owner = THIS_MODULE,
3057 .mount = ext3_mount,
3058 .kill_sb = kill_block_super,
3059 .fs_flags = FS_REQUIRES_DEV,
3062 static int __init init_ext3_fs(void)
3064 int err = init_ext3_xattr();
3067 err = init_inodecache();
3070 err = register_filesystem(&ext3_fs_type);
3075 destroy_inodecache();
3081 static void __exit exit_ext3_fs(void)
3083 unregister_filesystem(&ext3_fs_type);
3084 destroy_inodecache();
3088 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3089 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3090 MODULE_LICENSE("GPL");
3091 module_init(init_ext3_fs)
3092 module_exit(exit_ext3_fs)