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/blkdev.h>
21 #include <linux/parser.h>
22 #include <linux/exportfs.h>
23 #include <linux/statfs.h>
24 #include <linux/random.h>
25 #include <linux/mount.h>
26 #include <linux/quotaops.h>
27 #include <linux/seq_file.h>
28 #include <linux/log2.h>
29 #include <linux/cleancache.h>
30 #include <linux/namei.h>
32 #include <asm/uaccess.h>
34 #define CREATE_TRACE_POINTS
41 #ifdef CONFIG_EXT3_DEFAULTS_TO_ORDERED
42 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_ORDERED_DATA
44 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_WRITEBACK_DATA
47 static int ext3_load_journal(struct super_block
*, struct ext3_super_block
*,
48 unsigned long journal_devnum
);
49 static int ext3_create_journal(struct super_block
*, struct ext3_super_block
*,
51 static int ext3_commit_super(struct super_block
*sb
,
52 struct ext3_super_block
*es
,
54 static void ext3_mark_recovery_complete(struct super_block
* sb
,
55 struct ext3_super_block
* es
);
56 static void ext3_clear_journal_err(struct super_block
* sb
,
57 struct ext3_super_block
* es
);
58 static int ext3_sync_fs(struct super_block
*sb
, int wait
);
59 static const char *ext3_decode_error(struct super_block
* sb
, int errno
,
61 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
);
62 static int ext3_statfs (struct dentry
* dentry
, struct kstatfs
* buf
);
63 static int ext3_unfreeze(struct super_block
*sb
);
64 static int ext3_freeze(struct super_block
*sb
);
67 * Wrappers for journal_start/end.
69 handle_t
*ext3_journal_start_sb(struct super_block
*sb
, int nblocks
)
73 if (sb
->s_flags
& MS_RDONLY
)
74 return ERR_PTR(-EROFS
);
76 /* Special case here: if the journal has aborted behind our
77 * backs (eg. EIO in the commit thread), then we still need to
78 * take the FS itself readonly cleanly. */
79 journal
= EXT3_SB(sb
)->s_journal
;
80 if (is_journal_aborted(journal
)) {
81 ext3_abort(sb
, __func__
,
82 "Detected aborted journal");
83 return ERR_PTR(-EROFS
);
86 return journal_start(journal
, nblocks
);
89 int __ext3_journal_stop(const char *where
, handle_t
*handle
)
91 struct super_block
*sb
;
95 sb
= handle
->h_transaction
->t_journal
->j_private
;
97 rc
= journal_stop(handle
);
102 __ext3_std_error(sb
, where
, err
);
106 void ext3_journal_abort_handle(const char *caller
, const char *err_fn
,
107 struct buffer_head
*bh
, handle_t
*handle
, int err
)
110 const char *errstr
= ext3_decode_error(NULL
, err
, nbuf
);
113 BUFFER_TRACE(bh
, "abort");
118 if (is_handle_aborted(handle
))
121 printk(KERN_ERR
"EXT3-fs: %s: aborting transaction: %s in %s\n",
122 caller
, errstr
, err_fn
);
124 journal_abort_handle(handle
);
127 void ext3_msg(struct super_block
*sb
, const char *prefix
,
128 const char *fmt
, ...)
130 struct va_format vaf
;
138 printk("%sEXT3-fs (%s): %pV\n", prefix
, sb
->s_id
, &vaf
);
143 /* Deal with the reporting of failure conditions on a filesystem such as
144 * inconsistencies detected or read IO failures.
146 * On ext2, we can store the error state of the filesystem in the
147 * superblock. That is not possible on ext3, because we may have other
148 * write ordering constraints on the superblock which prevent us from
149 * writing it out straight away; and given that the journal is about to
150 * be aborted, we can't rely on the current, or future, transactions to
151 * write out the superblock safely.
153 * We'll just use the journal_abort() error code to record an error in
154 * the journal instead. On recovery, the journal will complain about
155 * that error until we've noted it down and cleared it.
158 static void ext3_handle_error(struct super_block
*sb
)
160 struct ext3_super_block
*es
= EXT3_SB(sb
)->s_es
;
162 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
163 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
165 if (sb
->s_flags
& MS_RDONLY
)
168 if (!test_opt (sb
, ERRORS_CONT
)) {
169 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
171 set_opt(EXT3_SB(sb
)->s_mount_opt
, ABORT
);
173 journal_abort(journal
, -EIO
);
175 if (test_opt (sb
, ERRORS_RO
)) {
176 ext3_msg(sb
, KERN_CRIT
,
177 "error: remounting filesystem read-only");
179 * Make sure updated value of ->s_mount_state will be visible
180 * before ->s_flags update.
183 sb
->s_flags
|= MS_RDONLY
;
185 ext3_commit_super(sb
, es
, 1);
186 if (test_opt(sb
, ERRORS_PANIC
))
187 panic("EXT3-fs (%s): panic forced after error\n",
191 void ext3_error(struct super_block
*sb
, const char *function
,
192 const char *fmt
, ...)
194 struct va_format vaf
;
202 printk(KERN_CRIT
"EXT3-fs error (device %s): %s: %pV\n",
203 sb
->s_id
, function
, &vaf
);
207 ext3_handle_error(sb
);
210 static const char *ext3_decode_error(struct super_block
* sb
, int errno
,
217 errstr
= "IO failure";
220 errstr
= "Out of memory";
223 if (!sb
|| EXT3_SB(sb
)->s_journal
->j_flags
& JFS_ABORT
)
224 errstr
= "Journal has aborted";
226 errstr
= "Readonly filesystem";
229 /* If the caller passed in an extra buffer for unknown
230 * errors, textualise them now. Else we just return
233 /* Check for truncated error codes... */
234 if (snprintf(nbuf
, 16, "error %d", -errno
) >= 0)
243 /* __ext3_std_error decodes expected errors from journaling functions
244 * automatically and invokes the appropriate error response. */
246 void __ext3_std_error (struct super_block
* sb
, const char * function
,
252 /* Special case: if the error is EROFS, and we're not already
253 * inside a transaction, then there's really no point in logging
255 if (errno
== -EROFS
&& journal_current_handle() == NULL
&&
256 (sb
->s_flags
& MS_RDONLY
))
259 errstr
= ext3_decode_error(sb
, errno
, nbuf
);
260 ext3_msg(sb
, KERN_CRIT
, "error in %s: %s", function
, errstr
);
262 ext3_handle_error(sb
);
266 * ext3_abort is a much stronger failure handler than ext3_error. The
267 * abort function may be used to deal with unrecoverable failures such
268 * as journal IO errors or ENOMEM at a critical moment in log management.
270 * We unconditionally force the filesystem into an ABORT|READONLY state,
271 * unless the error response on the fs has been set to panic in which
272 * case we take the easy way out and panic immediately.
275 void ext3_abort(struct super_block
*sb
, const char *function
,
276 const char *fmt
, ...)
278 struct va_format vaf
;
286 printk(KERN_CRIT
"EXT3-fs (%s): error: %s: %pV\n",
287 sb
->s_id
, function
, &vaf
);
291 if (test_opt(sb
, ERRORS_PANIC
))
292 panic("EXT3-fs: panic from previous error\n");
294 if (sb
->s_flags
& MS_RDONLY
)
297 ext3_msg(sb
, KERN_CRIT
,
298 "error: remounting filesystem read-only");
299 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
300 set_opt(EXT3_SB(sb
)->s_mount_opt
, ABORT
);
302 * Make sure updated value of ->s_mount_state will be visible
303 * before ->s_flags update.
306 sb
->s_flags
|= MS_RDONLY
;
308 if (EXT3_SB(sb
)->s_journal
)
309 journal_abort(EXT3_SB(sb
)->s_journal
, -EIO
);
312 void ext3_warning(struct super_block
*sb
, const char *function
,
313 const char *fmt
, ...)
315 struct va_format vaf
;
323 printk(KERN_WARNING
"EXT3-fs (%s): warning: %s: %pV\n",
324 sb
->s_id
, function
, &vaf
);
329 void ext3_update_dynamic_rev(struct super_block
*sb
)
331 struct ext3_super_block
*es
= EXT3_SB(sb
)->s_es
;
333 if (le32_to_cpu(es
->s_rev_level
) > EXT3_GOOD_OLD_REV
)
336 ext3_msg(sb
, KERN_WARNING
,
337 "warning: updating to rev %d because of "
338 "new feature flag, running e2fsck is recommended",
341 es
->s_first_ino
= cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO
);
342 es
->s_inode_size
= cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE
);
343 es
->s_rev_level
= cpu_to_le32(EXT3_DYNAMIC_REV
);
344 /* leave es->s_feature_*compat flags alone */
345 /* es->s_uuid will be set by e2fsck if empty */
348 * The rest of the superblock fields should be zero, and if not it
349 * means they are likely already in use, so leave them alone. We
350 * can leave it up to e2fsck to clean up any inconsistencies there.
355 * Open the external journal device
357 static struct block_device
*ext3_blkdev_get(dev_t dev
, struct super_block
*sb
)
359 struct block_device
*bdev
;
360 char b
[BDEVNAME_SIZE
];
362 bdev
= blkdev_get_by_dev(dev
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
, sb
);
368 ext3_msg(sb
, KERN_ERR
, "error: failed to open journal device %s: %ld",
369 __bdevname(dev
, b
), PTR_ERR(bdev
));
375 * Release the journal device
377 static void ext3_blkdev_put(struct block_device
*bdev
)
379 blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
);
382 static void ext3_blkdev_remove(struct ext3_sb_info
*sbi
)
384 struct block_device
*bdev
;
385 bdev
= sbi
->journal_bdev
;
387 ext3_blkdev_put(bdev
);
388 sbi
->journal_bdev
= NULL
;
392 static inline struct inode
*orphan_list_entry(struct list_head
*l
)
394 return &list_entry(l
, struct ext3_inode_info
, i_orphan
)->vfs_inode
;
397 static void dump_orphan_list(struct super_block
*sb
, struct ext3_sb_info
*sbi
)
401 ext3_msg(sb
, KERN_ERR
, "error: sb orphan head is %d",
402 le32_to_cpu(sbi
->s_es
->s_last_orphan
));
404 ext3_msg(sb
, KERN_ERR
, "sb_info orphan list:");
405 list_for_each(l
, &sbi
->s_orphan
) {
406 struct inode
*inode
= orphan_list_entry(l
);
407 ext3_msg(sb
, KERN_ERR
, " "
408 "inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
409 inode
->i_sb
->s_id
, inode
->i_ino
, inode
,
410 inode
->i_mode
, inode
->i_nlink
,
415 static void ext3_put_super (struct super_block
* sb
)
417 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
418 struct ext3_super_block
*es
= sbi
->s_es
;
421 dquot_disable(sb
, -1, DQUOT_USAGE_ENABLED
| DQUOT_LIMITS_ENABLED
);
422 ext3_xattr_put_super(sb
);
423 err
= journal_destroy(sbi
->s_journal
);
424 sbi
->s_journal
= NULL
;
426 ext3_abort(sb
, __func__
, "Couldn't clean up the journal");
428 if (!(sb
->s_flags
& MS_RDONLY
)) {
429 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
430 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
431 BUFFER_TRACE(sbi
->s_sbh
, "marking dirty");
432 mark_buffer_dirty(sbi
->s_sbh
);
433 ext3_commit_super(sb
, es
, 1);
436 for (i
= 0; i
< sbi
->s_gdb_count
; i
++)
437 brelse(sbi
->s_group_desc
[i
]);
438 kfree(sbi
->s_group_desc
);
439 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
440 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
441 percpu_counter_destroy(&sbi
->s_dirs_counter
);
444 for (i
= 0; i
< MAXQUOTAS
; i
++)
445 kfree(sbi
->s_qf_names
[i
]);
448 /* Debugging code just in case the in-memory inode orphan list
449 * isn't empty. The on-disk one can be non-empty if we've
450 * detected an error and taken the fs readonly, but the
451 * in-memory list had better be clean by this point. */
452 if (!list_empty(&sbi
->s_orphan
))
453 dump_orphan_list(sb
, sbi
);
454 J_ASSERT(list_empty(&sbi
->s_orphan
));
456 invalidate_bdev(sb
->s_bdev
);
457 if (sbi
->journal_bdev
&& sbi
->journal_bdev
!= sb
->s_bdev
) {
459 * Invalidate the journal device's buffers. We don't want them
460 * floating about in memory - the physical journal device may
461 * hotswapped, and it breaks the `ro-after' testing code.
463 sync_blockdev(sbi
->journal_bdev
);
464 invalidate_bdev(sbi
->journal_bdev
);
465 ext3_blkdev_remove(sbi
);
467 sb
->s_fs_info
= NULL
;
468 kfree(sbi
->s_blockgroup_lock
);
472 static struct kmem_cache
*ext3_inode_cachep
;
475 * Called inside transaction, so use GFP_NOFS
477 static struct inode
*ext3_alloc_inode(struct super_block
*sb
)
479 struct ext3_inode_info
*ei
;
481 ei
= kmem_cache_alloc(ext3_inode_cachep
, GFP_NOFS
);
484 ei
->i_block_alloc_info
= NULL
;
485 ei
->vfs_inode
.i_version
= 1;
486 atomic_set(&ei
->i_datasync_tid
, 0);
487 atomic_set(&ei
->i_sync_tid
, 0);
488 return &ei
->vfs_inode
;
491 static int ext3_drop_inode(struct inode
*inode
)
493 int drop
= generic_drop_inode(inode
);
495 trace_ext3_drop_inode(inode
, drop
);
499 static void ext3_i_callback(struct rcu_head
*head
)
501 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
502 kmem_cache_free(ext3_inode_cachep
, EXT3_I(inode
));
505 static void ext3_destroy_inode(struct inode
*inode
)
507 if (!list_empty(&(EXT3_I(inode
)->i_orphan
))) {
508 printk("EXT3 Inode %p: orphan list check failed!\n",
510 print_hex_dump(KERN_INFO
, "", DUMP_PREFIX_ADDRESS
, 16, 4,
511 EXT3_I(inode
), sizeof(struct ext3_inode_info
),
515 call_rcu(&inode
->i_rcu
, ext3_i_callback
);
518 static void init_once(void *foo
)
520 struct ext3_inode_info
*ei
= (struct ext3_inode_info
*) foo
;
522 INIT_LIST_HEAD(&ei
->i_orphan
);
523 #ifdef CONFIG_EXT3_FS_XATTR
524 init_rwsem(&ei
->xattr_sem
);
526 mutex_init(&ei
->truncate_mutex
);
527 inode_init_once(&ei
->vfs_inode
);
530 static int init_inodecache(void)
532 ext3_inode_cachep
= kmem_cache_create("ext3_inode_cache",
533 sizeof(struct ext3_inode_info
),
534 0, (SLAB_RECLAIM_ACCOUNT
|
537 if (ext3_inode_cachep
== NULL
)
542 static void destroy_inodecache(void)
545 * Make sure all delayed rcu free inodes are flushed before we
549 kmem_cache_destroy(ext3_inode_cachep
);
552 static inline void ext3_show_quota_options(struct seq_file
*seq
, struct super_block
*sb
)
554 #if defined(CONFIG_QUOTA)
555 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
557 if (sbi
->s_jquota_fmt
) {
560 switch (sbi
->s_jquota_fmt
) {
571 seq_printf(seq
, ",jqfmt=%s", fmtname
);
574 if (sbi
->s_qf_names
[USRQUOTA
])
575 seq_printf(seq
, ",usrjquota=%s", sbi
->s_qf_names
[USRQUOTA
]);
577 if (sbi
->s_qf_names
[GRPQUOTA
])
578 seq_printf(seq
, ",grpjquota=%s", sbi
->s_qf_names
[GRPQUOTA
]);
580 if (test_opt(sb
, USRQUOTA
))
581 seq_puts(seq
, ",usrquota");
583 if (test_opt(sb
, GRPQUOTA
))
584 seq_puts(seq
, ",grpquota");
588 static char *data_mode_string(unsigned long mode
)
591 case EXT3_MOUNT_JOURNAL_DATA
:
593 case EXT3_MOUNT_ORDERED_DATA
:
595 case EXT3_MOUNT_WRITEBACK_DATA
:
603 * - it's set to a non-default value OR
604 * - if the per-sb default is different from the global default
606 static int ext3_show_options(struct seq_file
*seq
, struct dentry
*root
)
608 struct super_block
*sb
= root
->d_sb
;
609 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
610 struct ext3_super_block
*es
= sbi
->s_es
;
611 unsigned long def_mount_opts
;
613 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
615 if (sbi
->s_sb_block
!= 1)
616 seq_printf(seq
, ",sb=%lu", sbi
->s_sb_block
);
617 if (test_opt(sb
, MINIX_DF
))
618 seq_puts(seq
, ",minixdf");
619 if (test_opt(sb
, GRPID
))
620 seq_puts(seq
, ",grpid");
621 if (!test_opt(sb
, GRPID
) && (def_mount_opts
& EXT3_DEFM_BSDGROUPS
))
622 seq_puts(seq
, ",nogrpid");
623 if (!uid_eq(sbi
->s_resuid
, make_kuid(&init_user_ns
, EXT3_DEF_RESUID
)) ||
624 le16_to_cpu(es
->s_def_resuid
) != EXT3_DEF_RESUID
) {
625 seq_printf(seq
, ",resuid=%u",
626 from_kuid_munged(&init_user_ns
, sbi
->s_resuid
));
628 if (!gid_eq(sbi
->s_resgid
, make_kgid(&init_user_ns
, EXT3_DEF_RESGID
)) ||
629 le16_to_cpu(es
->s_def_resgid
) != EXT3_DEF_RESGID
) {
630 seq_printf(seq
, ",resgid=%u",
631 from_kgid_munged(&init_user_ns
, sbi
->s_resgid
));
633 if (test_opt(sb
, ERRORS_RO
)) {
634 int def_errors
= le16_to_cpu(es
->s_errors
);
636 if (def_errors
== EXT3_ERRORS_PANIC
||
637 def_errors
== EXT3_ERRORS_CONTINUE
) {
638 seq_puts(seq
, ",errors=remount-ro");
641 if (test_opt(sb
, ERRORS_CONT
))
642 seq_puts(seq
, ",errors=continue");
643 if (test_opt(sb
, ERRORS_PANIC
))
644 seq_puts(seq
, ",errors=panic");
645 if (test_opt(sb
, NO_UID32
))
646 seq_puts(seq
, ",nouid32");
647 if (test_opt(sb
, DEBUG
))
648 seq_puts(seq
, ",debug");
649 #ifdef CONFIG_EXT3_FS_XATTR
650 if (test_opt(sb
, XATTR_USER
))
651 seq_puts(seq
, ",user_xattr");
652 if (!test_opt(sb
, XATTR_USER
) &&
653 (def_mount_opts
& EXT3_DEFM_XATTR_USER
)) {
654 seq_puts(seq
, ",nouser_xattr");
657 #ifdef CONFIG_EXT3_FS_POSIX_ACL
658 if (test_opt(sb
, POSIX_ACL
))
659 seq_puts(seq
, ",acl");
660 if (!test_opt(sb
, POSIX_ACL
) && (def_mount_opts
& EXT3_DEFM_ACL
))
661 seq_puts(seq
, ",noacl");
663 if (!test_opt(sb
, RESERVATION
))
664 seq_puts(seq
, ",noreservation");
665 if (sbi
->s_commit_interval
) {
666 seq_printf(seq
, ",commit=%u",
667 (unsigned) (sbi
->s_commit_interval
/ HZ
));
671 * Always display barrier state so it's clear what the status is.
673 seq_puts(seq
, ",barrier=");
674 seq_puts(seq
, test_opt(sb
, BARRIER
) ? "1" : "0");
675 seq_printf(seq
, ",data=%s", data_mode_string(test_opt(sb
, DATA_FLAGS
)));
676 if (test_opt(sb
, DATA_ERR_ABORT
))
677 seq_puts(seq
, ",data_err=abort");
679 if (test_opt(sb
, NOLOAD
))
680 seq_puts(seq
, ",norecovery");
682 ext3_show_quota_options(seq
, sb
);
688 static struct inode
*ext3_nfs_get_inode(struct super_block
*sb
,
689 u64 ino
, u32 generation
)
693 if (ino
< EXT3_FIRST_INO(sb
) && ino
!= EXT3_ROOT_INO
)
694 return ERR_PTR(-ESTALE
);
695 if (ino
> le32_to_cpu(EXT3_SB(sb
)->s_es
->s_inodes_count
))
696 return ERR_PTR(-ESTALE
);
698 /* iget isn't really right if the inode is currently unallocated!!
700 * ext3_read_inode will return a bad_inode if the inode had been
701 * deleted, so we should be safe.
703 * Currently we don't know the generation for parent directory, so
704 * a generation of 0 means "accept any"
706 inode
= ext3_iget(sb
, ino
);
708 return ERR_CAST(inode
);
709 if (generation
&& inode
->i_generation
!= generation
) {
711 return ERR_PTR(-ESTALE
);
717 static struct dentry
*ext3_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
718 int fh_len
, int fh_type
)
720 return generic_fh_to_dentry(sb
, fid
, fh_len
, fh_type
,
724 static struct dentry
*ext3_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
725 int fh_len
, int fh_type
)
727 return generic_fh_to_parent(sb
, fid
, fh_len
, fh_type
,
732 * Try to release metadata pages (indirect blocks, directories) which are
733 * mapped via the block device. Since these pages could have journal heads
734 * which would prevent try_to_free_buffers() from freeing them, we must use
735 * jbd layer's try_to_free_buffers() function to release them.
737 static int bdev_try_to_free_page(struct super_block
*sb
, struct page
*page
,
740 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
742 WARN_ON(PageChecked(page
));
743 if (!page_has_buffers(page
))
746 return journal_try_to_free_buffers(journal
, page
,
748 return try_to_free_buffers(page
);
752 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
753 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
755 static int ext3_write_dquot(struct dquot
*dquot
);
756 static int ext3_acquire_dquot(struct dquot
*dquot
);
757 static int ext3_release_dquot(struct dquot
*dquot
);
758 static int ext3_mark_dquot_dirty(struct dquot
*dquot
);
759 static int ext3_write_info(struct super_block
*sb
, int type
);
760 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
762 static int ext3_quota_on_mount(struct super_block
*sb
, int type
);
763 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
764 size_t len
, loff_t off
);
765 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
766 const char *data
, size_t len
, loff_t off
);
768 static const struct dquot_operations ext3_quota_operations
= {
769 .write_dquot
= ext3_write_dquot
,
770 .acquire_dquot
= ext3_acquire_dquot
,
771 .release_dquot
= ext3_release_dquot
,
772 .mark_dirty
= ext3_mark_dquot_dirty
,
773 .write_info
= ext3_write_info
,
774 .alloc_dquot
= dquot_alloc
,
775 .destroy_dquot
= dquot_destroy
,
778 static const struct quotactl_ops ext3_qctl_operations
= {
779 .quota_on
= ext3_quota_on
,
780 .quota_off
= dquot_quota_off
,
781 .quota_sync
= dquot_quota_sync
,
782 .get_info
= dquot_get_dqinfo
,
783 .set_info
= dquot_set_dqinfo
,
784 .get_dqblk
= dquot_get_dqblk
,
785 .set_dqblk
= dquot_set_dqblk
789 static const struct super_operations ext3_sops
= {
790 .alloc_inode
= ext3_alloc_inode
,
791 .destroy_inode
= ext3_destroy_inode
,
792 .write_inode
= ext3_write_inode
,
793 .dirty_inode
= ext3_dirty_inode
,
794 .drop_inode
= ext3_drop_inode
,
795 .evict_inode
= ext3_evict_inode
,
796 .put_super
= ext3_put_super
,
797 .sync_fs
= ext3_sync_fs
,
798 .freeze_fs
= ext3_freeze
,
799 .unfreeze_fs
= ext3_unfreeze
,
800 .statfs
= ext3_statfs
,
801 .remount_fs
= ext3_remount
,
802 .show_options
= ext3_show_options
,
804 .quota_read
= ext3_quota_read
,
805 .quota_write
= ext3_quota_write
,
807 .bdev_try_to_free_page
= bdev_try_to_free_page
,
810 static const struct export_operations ext3_export_ops
= {
811 .fh_to_dentry
= ext3_fh_to_dentry
,
812 .fh_to_parent
= ext3_fh_to_parent
,
813 .get_parent
= ext3_get_parent
,
817 Opt_bsd_df
, Opt_minix_df
, Opt_grpid
, Opt_nogrpid
,
818 Opt_resgid
, Opt_resuid
, Opt_sb
, Opt_err_cont
, Opt_err_panic
, Opt_err_ro
,
819 Opt_nouid32
, Opt_nocheck
, Opt_debug
, Opt_oldalloc
, Opt_orlov
,
820 Opt_user_xattr
, Opt_nouser_xattr
, Opt_acl
, Opt_noacl
,
821 Opt_reservation
, Opt_noreservation
, Opt_noload
, Opt_nobh
, Opt_bh
,
822 Opt_commit
, Opt_journal_update
, Opt_journal_inum
, Opt_journal_dev
,
824 Opt_abort
, Opt_data_journal
, Opt_data_ordered
, Opt_data_writeback
,
825 Opt_data_err_abort
, Opt_data_err_ignore
,
826 Opt_usrjquota
, Opt_grpjquota
, Opt_offusrjquota
, Opt_offgrpjquota
,
827 Opt_jqfmt_vfsold
, Opt_jqfmt_vfsv0
, Opt_jqfmt_vfsv1
, Opt_quota
,
828 Opt_noquota
, Opt_ignore
, Opt_barrier
, Opt_nobarrier
, Opt_err
,
829 Opt_resize
, Opt_usrquota
, Opt_grpquota
832 static const match_table_t tokens
= {
833 {Opt_bsd_df
, "bsddf"},
834 {Opt_minix_df
, "minixdf"},
835 {Opt_grpid
, "grpid"},
836 {Opt_grpid
, "bsdgroups"},
837 {Opt_nogrpid
, "nogrpid"},
838 {Opt_nogrpid
, "sysvgroups"},
839 {Opt_resgid
, "resgid=%u"},
840 {Opt_resuid
, "resuid=%u"},
842 {Opt_err_cont
, "errors=continue"},
843 {Opt_err_panic
, "errors=panic"},
844 {Opt_err_ro
, "errors=remount-ro"},
845 {Opt_nouid32
, "nouid32"},
846 {Opt_nocheck
, "nocheck"},
847 {Opt_nocheck
, "check=none"},
848 {Opt_debug
, "debug"},
849 {Opt_oldalloc
, "oldalloc"},
850 {Opt_orlov
, "orlov"},
851 {Opt_user_xattr
, "user_xattr"},
852 {Opt_nouser_xattr
, "nouser_xattr"},
854 {Opt_noacl
, "noacl"},
855 {Opt_reservation
, "reservation"},
856 {Opt_noreservation
, "noreservation"},
857 {Opt_noload
, "noload"},
858 {Opt_noload
, "norecovery"},
861 {Opt_commit
, "commit=%u"},
862 {Opt_journal_update
, "journal=update"},
863 {Opt_journal_inum
, "journal=%u"},
864 {Opt_journal_dev
, "journal_dev=%u"},
865 {Opt_journal_path
, "journal_path=%s"},
866 {Opt_abort
, "abort"},
867 {Opt_data_journal
, "data=journal"},
868 {Opt_data_ordered
, "data=ordered"},
869 {Opt_data_writeback
, "data=writeback"},
870 {Opt_data_err_abort
, "data_err=abort"},
871 {Opt_data_err_ignore
, "data_err=ignore"},
872 {Opt_offusrjquota
, "usrjquota="},
873 {Opt_usrjquota
, "usrjquota=%s"},
874 {Opt_offgrpjquota
, "grpjquota="},
875 {Opt_grpjquota
, "grpjquota=%s"},
876 {Opt_jqfmt_vfsold
, "jqfmt=vfsold"},
877 {Opt_jqfmt_vfsv0
, "jqfmt=vfsv0"},
878 {Opt_jqfmt_vfsv1
, "jqfmt=vfsv1"},
879 {Opt_grpquota
, "grpquota"},
880 {Opt_noquota
, "noquota"},
881 {Opt_quota
, "quota"},
882 {Opt_usrquota
, "usrquota"},
883 {Opt_barrier
, "barrier=%u"},
884 {Opt_barrier
, "barrier"},
885 {Opt_nobarrier
, "nobarrier"},
886 {Opt_resize
, "resize"},
890 static ext3_fsblk_t
get_sb_block(void **data
, struct super_block
*sb
)
892 ext3_fsblk_t sb_block
;
893 char *options
= (char *) *data
;
895 if (!options
|| strncmp(options
, "sb=", 3) != 0)
896 return 1; /* Default location */
898 /*todo: use simple_strtoll with >32bit ext3 */
899 sb_block
= simple_strtoul(options
, &options
, 0);
900 if (*options
&& *options
!= ',') {
901 ext3_msg(sb
, KERN_ERR
, "error: invalid sb specification: %s",
907 *data
= (void *) options
;
912 static int set_qf_name(struct super_block
*sb
, int qtype
, substring_t
*args
)
914 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
917 if (sb_any_quota_loaded(sb
) &&
918 !sbi
->s_qf_names
[qtype
]) {
919 ext3_msg(sb
, KERN_ERR
,
920 "Cannot change journaled "
921 "quota options when quota turned on");
924 qname
= match_strdup(args
);
926 ext3_msg(sb
, KERN_ERR
,
927 "Not enough memory for storing quotafile name");
930 if (sbi
->s_qf_names
[qtype
]) {
931 int same
= !strcmp(sbi
->s_qf_names
[qtype
], qname
);
935 ext3_msg(sb
, KERN_ERR
,
936 "%s quota file already specified",
941 if (strchr(qname
, '/')) {
942 ext3_msg(sb
, KERN_ERR
,
943 "quotafile must be on filesystem root");
947 sbi
->s_qf_names
[qtype
] = qname
;
948 set_opt(sbi
->s_mount_opt
, QUOTA
);
952 static int clear_qf_name(struct super_block
*sb
, int qtype
) {
954 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
956 if (sb_any_quota_loaded(sb
) &&
957 sbi
->s_qf_names
[qtype
]) {
958 ext3_msg(sb
, KERN_ERR
, "Cannot change journaled quota options"
959 " when quota turned on");
962 if (sbi
->s_qf_names
[qtype
]) {
963 kfree(sbi
->s_qf_names
[qtype
]);
964 sbi
->s_qf_names
[qtype
] = NULL
;
970 static int parse_options (char *options
, struct super_block
*sb
,
971 unsigned int *inum
, unsigned long *journal_devnum
,
972 ext3_fsblk_t
*n_blocks_count
, int is_remount
)
974 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
976 substring_t args
[MAX_OPT_ARGS
];
982 struct inode
*journal_inode
;
993 while ((p
= strsep (&options
, ",")) != NULL
) {
998 * Initialize args struct so we know whether arg was
999 * found; some options take optional arguments.
1001 args
[0].to
= args
[0].from
= NULL
;
1002 token
= match_token(p
, tokens
, args
);
1005 clear_opt (sbi
->s_mount_opt
, MINIX_DF
);
1008 set_opt (sbi
->s_mount_opt
, MINIX_DF
);
1011 set_opt (sbi
->s_mount_opt
, GRPID
);
1014 clear_opt (sbi
->s_mount_opt
, GRPID
);
1017 if (match_int(&args
[0], &option
))
1019 uid
= make_kuid(current_user_ns(), option
);
1020 if (!uid_valid(uid
)) {
1021 ext3_msg(sb
, KERN_ERR
, "Invalid uid value %d", option
);
1025 sbi
->s_resuid
= uid
;
1028 if (match_int(&args
[0], &option
))
1030 gid
= make_kgid(current_user_ns(), option
);
1031 if (!gid_valid(gid
)) {
1032 ext3_msg(sb
, KERN_ERR
, "Invalid gid value %d", option
);
1035 sbi
->s_resgid
= gid
;
1038 /* handled by get_sb_block() instead of here */
1039 /* *sb_block = match_int(&args[0]); */
1042 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
1043 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
1044 set_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
1047 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
1048 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
1049 set_opt (sbi
->s_mount_opt
, ERRORS_RO
);
1052 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
1053 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
1054 set_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
1057 set_opt (sbi
->s_mount_opt
, NO_UID32
);
1060 clear_opt (sbi
->s_mount_opt
, CHECK
);
1063 set_opt (sbi
->s_mount_opt
, DEBUG
);
1066 ext3_msg(sb
, KERN_WARNING
,
1067 "Ignoring deprecated oldalloc option");
1070 ext3_msg(sb
, KERN_WARNING
,
1071 "Ignoring deprecated orlov option");
1073 #ifdef CONFIG_EXT3_FS_XATTR
1074 case Opt_user_xattr
:
1075 set_opt (sbi
->s_mount_opt
, XATTR_USER
);
1077 case Opt_nouser_xattr
:
1078 clear_opt (sbi
->s_mount_opt
, XATTR_USER
);
1081 case Opt_user_xattr
:
1082 case Opt_nouser_xattr
:
1083 ext3_msg(sb
, KERN_INFO
,
1084 "(no)user_xattr options not supported");
1087 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1089 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
1092 clear_opt(sbi
->s_mount_opt
, POSIX_ACL
);
1097 ext3_msg(sb
, KERN_INFO
,
1098 "(no)acl options not supported");
1101 case Opt_reservation
:
1102 set_opt(sbi
->s_mount_opt
, RESERVATION
);
1104 case Opt_noreservation
:
1105 clear_opt(sbi
->s_mount_opt
, RESERVATION
);
1107 case Opt_journal_update
:
1109 /* Eventually we will want to be able to create
1110 a journal file here. For now, only allow the
1111 user to specify an existing inode to be the
1114 ext3_msg(sb
, KERN_ERR
, "error: cannot specify "
1115 "journal on remount");
1118 set_opt (sbi
->s_mount_opt
, UPDATE_JOURNAL
);
1120 case Opt_journal_inum
:
1122 ext3_msg(sb
, KERN_ERR
, "error: cannot specify "
1123 "journal on remount");
1126 if (match_int(&args
[0], &option
))
1130 case Opt_journal_dev
:
1132 ext3_msg(sb
, KERN_ERR
, "error: cannot specify "
1133 "journal on remount");
1136 if (match_int(&args
[0], &option
))
1138 *journal_devnum
= option
;
1140 case Opt_journal_path
:
1142 ext3_msg(sb
, KERN_ERR
, "error: cannot specify "
1143 "journal on remount");
1147 journal_path
= match_strdup(&args
[0]);
1148 if (!journal_path
) {
1149 ext3_msg(sb
, KERN_ERR
, "error: could not dup "
1150 "journal device string");
1154 error
= kern_path(journal_path
, LOOKUP_FOLLOW
, &path
);
1156 ext3_msg(sb
, KERN_ERR
, "error: could not find "
1157 "journal device path: error %d", error
);
1158 kfree(journal_path
);
1162 journal_inode
= path
.dentry
->d_inode
;
1163 if (!S_ISBLK(journal_inode
->i_mode
)) {
1164 ext3_msg(sb
, KERN_ERR
, "error: journal path %s "
1165 "is not a block device", journal_path
);
1167 kfree(journal_path
);
1171 *journal_devnum
= new_encode_dev(journal_inode
->i_rdev
);
1173 kfree(journal_path
);
1176 set_opt (sbi
->s_mount_opt
, NOLOAD
);
1179 if (match_int(&args
[0], &option
))
1184 option
= JBD_DEFAULT_MAX_COMMIT_AGE
;
1185 sbi
->s_commit_interval
= HZ
* option
;
1187 case Opt_data_journal
:
1188 data_opt
= EXT3_MOUNT_JOURNAL_DATA
;
1190 case Opt_data_ordered
:
1191 data_opt
= EXT3_MOUNT_ORDERED_DATA
;
1193 case Opt_data_writeback
:
1194 data_opt
= EXT3_MOUNT_WRITEBACK_DATA
;
1197 if (test_opt(sb
, DATA_FLAGS
) == data_opt
)
1199 ext3_msg(sb
, KERN_ERR
,
1200 "error: cannot change "
1201 "data mode on remount. The filesystem "
1202 "is mounted in data=%s mode and you "
1203 "try to remount it in data=%s mode.",
1204 data_mode_string(test_opt(sb
,
1206 data_mode_string(data_opt
));
1209 clear_opt(sbi
->s_mount_opt
, DATA_FLAGS
);
1210 sbi
->s_mount_opt
|= data_opt
;
1213 case Opt_data_err_abort
:
1214 set_opt(sbi
->s_mount_opt
, DATA_ERR_ABORT
);
1216 case Opt_data_err_ignore
:
1217 clear_opt(sbi
->s_mount_opt
, DATA_ERR_ABORT
);
1221 if (!set_qf_name(sb
, USRQUOTA
, &args
[0]))
1225 if (!set_qf_name(sb
, GRPQUOTA
, &args
[0]))
1228 case Opt_offusrjquota
:
1229 if (!clear_qf_name(sb
, USRQUOTA
))
1232 case Opt_offgrpjquota
:
1233 if (!clear_qf_name(sb
, GRPQUOTA
))
1236 case Opt_jqfmt_vfsold
:
1237 qfmt
= QFMT_VFS_OLD
;
1239 case Opt_jqfmt_vfsv0
:
1242 case Opt_jqfmt_vfsv1
:
1245 if (sb_any_quota_loaded(sb
) &&
1246 sbi
->s_jquota_fmt
!= qfmt
) {
1247 ext3_msg(sb
, KERN_ERR
, "error: cannot change "
1248 "journaled quota options when "
1249 "quota turned on.");
1252 sbi
->s_jquota_fmt
= qfmt
;
1256 set_opt(sbi
->s_mount_opt
, QUOTA
);
1257 set_opt(sbi
->s_mount_opt
, USRQUOTA
);
1260 set_opt(sbi
->s_mount_opt
, QUOTA
);
1261 set_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1264 if (sb_any_quota_loaded(sb
)) {
1265 ext3_msg(sb
, KERN_ERR
, "error: cannot change "
1266 "quota options when quota turned on.");
1269 clear_opt(sbi
->s_mount_opt
, QUOTA
);
1270 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1271 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1277 ext3_msg(sb
, KERN_ERR
,
1278 "error: quota options not supported.");
1282 case Opt_offusrjquota
:
1283 case Opt_offgrpjquota
:
1284 case Opt_jqfmt_vfsold
:
1285 case Opt_jqfmt_vfsv0
:
1286 case Opt_jqfmt_vfsv1
:
1287 ext3_msg(sb
, KERN_ERR
,
1288 "error: journaled quota options not "
1295 set_opt(sbi
->s_mount_opt
, ABORT
);
1298 clear_opt(sbi
->s_mount_opt
, BARRIER
);
1302 if (match_int(&args
[0], &option
))
1305 option
= 1; /* No argument, default to 1 */
1307 set_opt(sbi
->s_mount_opt
, BARRIER
);
1309 clear_opt(sbi
->s_mount_opt
, BARRIER
);
1315 ext3_msg(sb
, KERN_ERR
,
1316 "error: resize option only available "
1320 if (match_int(&args
[0], &option
) != 0)
1322 *n_blocks_count
= option
;
1325 ext3_msg(sb
, KERN_WARNING
,
1326 "warning: ignoring deprecated nobh option");
1329 ext3_msg(sb
, KERN_WARNING
,
1330 "warning: ignoring deprecated bh option");
1333 ext3_msg(sb
, KERN_ERR
,
1334 "error: unrecognized mount option \"%s\" "
1335 "or missing value", p
);
1340 if (sbi
->s_qf_names
[USRQUOTA
] || sbi
->s_qf_names
[GRPQUOTA
]) {
1341 if (test_opt(sb
, USRQUOTA
) && sbi
->s_qf_names
[USRQUOTA
])
1342 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1343 if (test_opt(sb
, GRPQUOTA
) && sbi
->s_qf_names
[GRPQUOTA
])
1344 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1346 if (test_opt(sb
, GRPQUOTA
) || test_opt(sb
, USRQUOTA
)) {
1347 ext3_msg(sb
, KERN_ERR
, "error: old and new quota "
1352 if (!sbi
->s_jquota_fmt
) {
1353 ext3_msg(sb
, KERN_ERR
, "error: journaled quota format "
1358 if (sbi
->s_jquota_fmt
) {
1359 ext3_msg(sb
, KERN_ERR
, "error: journaled quota format "
1360 "specified with no journaling "
1369 static int ext3_setup_super(struct super_block
*sb
, struct ext3_super_block
*es
,
1372 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1375 if (le32_to_cpu(es
->s_rev_level
) > EXT3_MAX_SUPP_REV
) {
1376 ext3_msg(sb
, KERN_ERR
,
1377 "error: revision level too high, "
1378 "forcing read-only mode");
1383 if (!(sbi
->s_mount_state
& EXT3_VALID_FS
))
1384 ext3_msg(sb
, KERN_WARNING
,
1385 "warning: mounting unchecked fs, "
1386 "running e2fsck is recommended");
1387 else if ((sbi
->s_mount_state
& EXT3_ERROR_FS
))
1388 ext3_msg(sb
, KERN_WARNING
,
1389 "warning: mounting fs with errors, "
1390 "running e2fsck is recommended");
1391 else if ((__s16
) le16_to_cpu(es
->s_max_mnt_count
) > 0 &&
1392 le16_to_cpu(es
->s_mnt_count
) >=
1393 le16_to_cpu(es
->s_max_mnt_count
))
1394 ext3_msg(sb
, KERN_WARNING
,
1395 "warning: maximal mount count reached, "
1396 "running e2fsck is recommended");
1397 else if (le32_to_cpu(es
->s_checkinterval
) &&
1398 (le32_to_cpu(es
->s_lastcheck
) +
1399 le32_to_cpu(es
->s_checkinterval
) <= get_seconds()))
1400 ext3_msg(sb
, KERN_WARNING
,
1401 "warning: checktime reached, "
1402 "running e2fsck is recommended");
1404 /* @@@ We _will_ want to clear the valid bit if we find
1405 inconsistencies, to force a fsck at reboot. But for
1406 a plain journaled filesystem we can keep it set as
1407 valid forever! :) */
1408 es
->s_state
&= cpu_to_le16(~EXT3_VALID_FS
);
1410 if (!le16_to_cpu(es
->s_max_mnt_count
))
1411 es
->s_max_mnt_count
= cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT
);
1412 le16_add_cpu(&es
->s_mnt_count
, 1);
1413 es
->s_mtime
= cpu_to_le32(get_seconds());
1414 ext3_update_dynamic_rev(sb
);
1415 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
1417 ext3_commit_super(sb
, es
, 1);
1418 if (test_opt(sb
, DEBUG
))
1419 ext3_msg(sb
, KERN_INFO
, "[bs=%lu, gc=%lu, "
1420 "bpg=%lu, ipg=%lu, mo=%04lx]",
1422 sbi
->s_groups_count
,
1423 EXT3_BLOCKS_PER_GROUP(sb
),
1424 EXT3_INODES_PER_GROUP(sb
),
1427 if (EXT3_SB(sb
)->s_journal
->j_inode
== NULL
) {
1428 char b
[BDEVNAME_SIZE
];
1429 ext3_msg(sb
, KERN_INFO
, "using external journal on %s",
1430 bdevname(EXT3_SB(sb
)->s_journal
->j_dev
, b
));
1432 ext3_msg(sb
, KERN_INFO
, "using internal journal");
1434 cleancache_init_fs(sb
);
1438 /* Called at mount-time, super-block is locked */
1439 static int ext3_check_descriptors(struct super_block
*sb
)
1441 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1444 ext3_debug ("Checking group descriptors");
1446 for (i
= 0; i
< sbi
->s_groups_count
; i
++) {
1447 struct ext3_group_desc
*gdp
= ext3_get_group_desc(sb
, i
, NULL
);
1448 ext3_fsblk_t first_block
= ext3_group_first_block_no(sb
, i
);
1449 ext3_fsblk_t last_block
;
1451 if (i
== sbi
->s_groups_count
- 1)
1452 last_block
= le32_to_cpu(sbi
->s_es
->s_blocks_count
) - 1;
1454 last_block
= first_block
+
1455 (EXT3_BLOCKS_PER_GROUP(sb
) - 1);
1457 if (le32_to_cpu(gdp
->bg_block_bitmap
) < first_block
||
1458 le32_to_cpu(gdp
->bg_block_bitmap
) > last_block
)
1460 ext3_error (sb
, "ext3_check_descriptors",
1461 "Block bitmap for group %d"
1462 " not in group (block %lu)!",
1464 le32_to_cpu(gdp
->bg_block_bitmap
));
1467 if (le32_to_cpu(gdp
->bg_inode_bitmap
) < first_block
||
1468 le32_to_cpu(gdp
->bg_inode_bitmap
) > last_block
)
1470 ext3_error (sb
, "ext3_check_descriptors",
1471 "Inode bitmap for group %d"
1472 " not in group (block %lu)!",
1474 le32_to_cpu(gdp
->bg_inode_bitmap
));
1477 if (le32_to_cpu(gdp
->bg_inode_table
) < first_block
||
1478 le32_to_cpu(gdp
->bg_inode_table
) + sbi
->s_itb_per_group
- 1 >
1481 ext3_error (sb
, "ext3_check_descriptors",
1482 "Inode table for group %d"
1483 " not in group (block %lu)!",
1485 le32_to_cpu(gdp
->bg_inode_table
));
1490 sbi
->s_es
->s_free_blocks_count
=cpu_to_le32(ext3_count_free_blocks(sb
));
1491 sbi
->s_es
->s_free_inodes_count
=cpu_to_le32(ext3_count_free_inodes(sb
));
1496 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1497 * the superblock) which were deleted from all directories, but held open by
1498 * a process at the time of a crash. We walk the list and try to delete these
1499 * inodes at recovery time (only with a read-write filesystem).
1501 * In order to keep the orphan inode chain consistent during traversal (in
1502 * case of crash during recovery), we link each inode into the superblock
1503 * orphan list_head and handle it the same way as an inode deletion during
1504 * normal operation (which journals the operations for us).
1506 * We only do an iget() and an iput() on each inode, which is very safe if we
1507 * accidentally point at an in-use or already deleted inode. The worst that
1508 * can happen in this case is that we get a "bit already cleared" message from
1509 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1510 * e2fsck was run on this filesystem, and it must have already done the orphan
1511 * inode cleanup for us, so we can safely abort without any further action.
1513 static void ext3_orphan_cleanup (struct super_block
* sb
,
1514 struct ext3_super_block
* es
)
1516 unsigned int s_flags
= sb
->s_flags
;
1517 int nr_orphans
= 0, nr_truncates
= 0;
1521 if (!es
->s_last_orphan
) {
1522 jbd_debug(4, "no orphan inodes to clean up\n");
1526 if (bdev_read_only(sb
->s_bdev
)) {
1527 ext3_msg(sb
, KERN_ERR
, "error: write access "
1528 "unavailable, skipping orphan cleanup.");
1532 /* Check if feature set allows readwrite operations */
1533 if (EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~EXT3_FEATURE_RO_COMPAT_SUPP
)) {
1534 ext3_msg(sb
, KERN_INFO
, "Skipping orphan cleanup due to "
1535 "unknown ROCOMPAT features");
1539 if (EXT3_SB(sb
)->s_mount_state
& EXT3_ERROR_FS
) {
1540 /* don't clear list on RO mount w/ errors */
1541 if (es
->s_last_orphan
&& !(s_flags
& MS_RDONLY
)) {
1542 jbd_debug(1, "Errors on filesystem, "
1543 "clearing orphan list.\n");
1544 es
->s_last_orphan
= 0;
1546 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1550 if (s_flags
& MS_RDONLY
) {
1551 ext3_msg(sb
, KERN_INFO
, "orphan cleanup on readonly fs");
1552 sb
->s_flags
&= ~MS_RDONLY
;
1555 /* Needed for iput() to work correctly and not trash data */
1556 sb
->s_flags
|= MS_ACTIVE
;
1557 /* Turn on quotas so that they are updated correctly */
1558 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1559 if (EXT3_SB(sb
)->s_qf_names
[i
]) {
1560 int ret
= ext3_quota_on_mount(sb
, i
);
1562 ext3_msg(sb
, KERN_ERR
,
1563 "error: cannot turn on journaled "
1569 while (es
->s_last_orphan
) {
1570 struct inode
*inode
;
1572 inode
= ext3_orphan_get(sb
, le32_to_cpu(es
->s_last_orphan
));
1573 if (IS_ERR(inode
)) {
1574 es
->s_last_orphan
= 0;
1578 list_add(&EXT3_I(inode
)->i_orphan
, &EXT3_SB(sb
)->s_orphan
);
1579 dquot_initialize(inode
);
1580 if (inode
->i_nlink
) {
1582 "%s: truncating inode %lu to %Ld bytes\n",
1583 __func__
, inode
->i_ino
, inode
->i_size
);
1584 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1585 inode
->i_ino
, inode
->i_size
);
1586 ext3_truncate(inode
);
1590 "%s: deleting unreferenced inode %lu\n",
1591 __func__
, inode
->i_ino
);
1592 jbd_debug(2, "deleting unreferenced inode %lu\n",
1596 iput(inode
); /* The delete magic happens here! */
1599 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1602 ext3_msg(sb
, KERN_INFO
, "%d orphan inode%s deleted",
1603 PLURAL(nr_orphans
));
1605 ext3_msg(sb
, KERN_INFO
, "%d truncate%s cleaned up",
1606 PLURAL(nr_truncates
));
1608 /* Turn quotas off */
1609 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1610 if (sb_dqopt(sb
)->files
[i
])
1611 dquot_quota_off(sb
, i
);
1614 sb
->s_flags
= s_flags
; /* Restore MS_RDONLY status */
1618 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1619 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1620 * We need to be 1 filesystem block less than the 2^32 sector limit.
1622 static loff_t
ext3_max_size(int bits
)
1624 loff_t res
= EXT3_NDIR_BLOCKS
;
1628 /* This is calculated to be the largest file size for a
1629 * dense, file such that the total number of
1630 * sectors in the file, including data and all indirect blocks,
1631 * does not exceed 2^32 -1
1632 * __u32 i_blocks representing the total number of
1633 * 512 bytes blocks of the file
1635 upper_limit
= (1LL << 32) - 1;
1637 /* total blocks in file system block size */
1638 upper_limit
>>= (bits
- 9);
1641 /* indirect blocks */
1643 /* double indirect blocks */
1644 meta_blocks
+= 1 + (1LL << (bits
-2));
1645 /* tripple indirect blocks */
1646 meta_blocks
+= 1 + (1LL << (bits
-2)) + (1LL << (2*(bits
-2)));
1648 upper_limit
-= meta_blocks
;
1649 upper_limit
<<= bits
;
1651 res
+= 1LL << (bits
-2);
1652 res
+= 1LL << (2*(bits
-2));
1653 res
+= 1LL << (3*(bits
-2));
1655 if (res
> upper_limit
)
1658 if (res
> MAX_LFS_FILESIZE
)
1659 res
= MAX_LFS_FILESIZE
;
1664 static ext3_fsblk_t
descriptor_loc(struct super_block
*sb
,
1665 ext3_fsblk_t logic_sb_block
,
1668 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1669 unsigned long bg
, first_meta_bg
;
1672 first_meta_bg
= le32_to_cpu(sbi
->s_es
->s_first_meta_bg
);
1674 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_META_BG
) ||
1676 return (logic_sb_block
+ nr
+ 1);
1677 bg
= sbi
->s_desc_per_block
* nr
;
1678 if (ext3_bg_has_super(sb
, bg
))
1680 return (has_super
+ ext3_group_first_block_no(sb
, bg
));
1684 static int ext3_fill_super (struct super_block
*sb
, void *data
, int silent
)
1686 struct buffer_head
* bh
;
1687 struct ext3_super_block
*es
= NULL
;
1688 struct ext3_sb_info
*sbi
;
1690 ext3_fsblk_t sb_block
= get_sb_block(&data
, sb
);
1691 ext3_fsblk_t logic_sb_block
;
1692 unsigned long offset
= 0;
1693 unsigned int journal_inum
= 0;
1694 unsigned long journal_devnum
= 0;
1695 unsigned long def_mount_opts
;
1706 sbi
= kzalloc(sizeof(*sbi
), GFP_KERNEL
);
1710 sbi
->s_blockgroup_lock
=
1711 kzalloc(sizeof(struct blockgroup_lock
), GFP_KERNEL
);
1712 if (!sbi
->s_blockgroup_lock
) {
1716 sb
->s_fs_info
= sbi
;
1717 sbi
->s_sb_block
= sb_block
;
1719 blocksize
= sb_min_blocksize(sb
, EXT3_MIN_BLOCK_SIZE
);
1721 ext3_msg(sb
, KERN_ERR
, "error: unable to set blocksize");
1726 * The ext3 superblock will not be buffer aligned for other than 1kB
1727 * block sizes. We need to calculate the offset from buffer start.
1729 if (blocksize
!= EXT3_MIN_BLOCK_SIZE
) {
1730 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1731 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1733 logic_sb_block
= sb_block
;
1736 if (!(bh
= sb_bread(sb
, logic_sb_block
))) {
1737 ext3_msg(sb
, KERN_ERR
, "error: unable to read superblock");
1741 * Note: s_es must be initialized as soon as possible because
1742 * some ext3 macro-instructions depend on its value
1744 es
= (struct ext3_super_block
*) (bh
->b_data
+ offset
);
1746 sb
->s_magic
= le16_to_cpu(es
->s_magic
);
1747 if (sb
->s_magic
!= EXT3_SUPER_MAGIC
)
1750 /* Set defaults before we parse the mount options */
1751 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
1752 if (def_mount_opts
& EXT3_DEFM_DEBUG
)
1753 set_opt(sbi
->s_mount_opt
, DEBUG
);
1754 if (def_mount_opts
& EXT3_DEFM_BSDGROUPS
)
1755 set_opt(sbi
->s_mount_opt
, GRPID
);
1756 if (def_mount_opts
& EXT3_DEFM_UID16
)
1757 set_opt(sbi
->s_mount_opt
, NO_UID32
);
1758 #ifdef CONFIG_EXT3_FS_XATTR
1759 if (def_mount_opts
& EXT3_DEFM_XATTR_USER
)
1760 set_opt(sbi
->s_mount_opt
, XATTR_USER
);
1762 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1763 if (def_mount_opts
& EXT3_DEFM_ACL
)
1764 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
1766 if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_DATA
)
1767 set_opt(sbi
->s_mount_opt
, JOURNAL_DATA
);
1768 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_ORDERED
)
1769 set_opt(sbi
->s_mount_opt
, ORDERED_DATA
);
1770 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_WBACK
)
1771 set_opt(sbi
->s_mount_opt
, WRITEBACK_DATA
);
1773 if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_PANIC
)
1774 set_opt(sbi
->s_mount_opt
, ERRORS_PANIC
);
1775 else if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_CONTINUE
)
1776 set_opt(sbi
->s_mount_opt
, ERRORS_CONT
);
1778 set_opt(sbi
->s_mount_opt
, ERRORS_RO
);
1780 sbi
->s_resuid
= make_kuid(&init_user_ns
, le16_to_cpu(es
->s_def_resuid
));
1781 sbi
->s_resgid
= make_kgid(&init_user_ns
, le16_to_cpu(es
->s_def_resgid
));
1783 /* enable barriers by default */
1784 set_opt(sbi
->s_mount_opt
, BARRIER
);
1785 set_opt(sbi
->s_mount_opt
, RESERVATION
);
1787 if (!parse_options ((char *) data
, sb
, &journal_inum
, &journal_devnum
,
1791 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
1792 (test_opt(sb
, POSIX_ACL
) ? MS_POSIXACL
: 0);
1794 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
&&
1795 (EXT3_HAS_COMPAT_FEATURE(sb
, ~0U) ||
1796 EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~0U) ||
1797 EXT3_HAS_INCOMPAT_FEATURE(sb
, ~0U)))
1798 ext3_msg(sb
, KERN_WARNING
,
1799 "warning: feature flags set on rev 0 fs, "
1800 "running e2fsck is recommended");
1802 * Check feature flags regardless of the revision level, since we
1803 * previously didn't change the revision level when setting the flags,
1804 * so there is a chance incompat flags are set on a rev 0 filesystem.
1806 features
= EXT3_HAS_INCOMPAT_FEATURE(sb
, ~EXT3_FEATURE_INCOMPAT_SUPP
);
1808 ext3_msg(sb
, KERN_ERR
,
1809 "error: couldn't mount because of unsupported "
1810 "optional features (%x)", le32_to_cpu(features
));
1813 features
= EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~EXT3_FEATURE_RO_COMPAT_SUPP
);
1814 if (!(sb
->s_flags
& MS_RDONLY
) && features
) {
1815 ext3_msg(sb
, KERN_ERR
,
1816 "error: couldn't mount RDWR because of unsupported "
1817 "optional features (%x)", le32_to_cpu(features
));
1820 blocksize
= BLOCK_SIZE
<< le32_to_cpu(es
->s_log_block_size
);
1822 if (blocksize
< EXT3_MIN_BLOCK_SIZE
||
1823 blocksize
> EXT3_MAX_BLOCK_SIZE
) {
1824 ext3_msg(sb
, KERN_ERR
,
1825 "error: couldn't mount because of unsupported "
1826 "filesystem blocksize %d", blocksize
);
1830 hblock
= bdev_logical_block_size(sb
->s_bdev
);
1831 if (sb
->s_blocksize
!= blocksize
) {
1833 * Make sure the blocksize for the filesystem is larger
1834 * than the hardware sectorsize for the machine.
1836 if (blocksize
< hblock
) {
1837 ext3_msg(sb
, KERN_ERR
,
1838 "error: fsblocksize %d too small for "
1839 "hardware sectorsize %d", blocksize
, hblock
);
1844 if (!sb_set_blocksize(sb
, blocksize
)) {
1845 ext3_msg(sb
, KERN_ERR
,
1846 "error: bad blocksize %d", blocksize
);
1849 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1850 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1851 bh
= sb_bread(sb
, logic_sb_block
);
1853 ext3_msg(sb
, KERN_ERR
,
1854 "error: can't read superblock on 2nd try");
1857 es
= (struct ext3_super_block
*)(bh
->b_data
+ offset
);
1859 if (es
->s_magic
!= cpu_to_le16(EXT3_SUPER_MAGIC
)) {
1860 ext3_msg(sb
, KERN_ERR
,
1861 "error: magic mismatch");
1866 sb
->s_maxbytes
= ext3_max_size(sb
->s_blocksize_bits
);
1868 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
) {
1869 sbi
->s_inode_size
= EXT3_GOOD_OLD_INODE_SIZE
;
1870 sbi
->s_first_ino
= EXT3_GOOD_OLD_FIRST_INO
;
1872 sbi
->s_inode_size
= le16_to_cpu(es
->s_inode_size
);
1873 sbi
->s_first_ino
= le32_to_cpu(es
->s_first_ino
);
1874 if ((sbi
->s_inode_size
< EXT3_GOOD_OLD_INODE_SIZE
) ||
1875 (!is_power_of_2(sbi
->s_inode_size
)) ||
1876 (sbi
->s_inode_size
> blocksize
)) {
1877 ext3_msg(sb
, KERN_ERR
,
1878 "error: unsupported inode size: %d",
1883 sbi
->s_frag_size
= EXT3_MIN_FRAG_SIZE
<<
1884 le32_to_cpu(es
->s_log_frag_size
);
1885 if (blocksize
!= sbi
->s_frag_size
) {
1886 ext3_msg(sb
, KERN_ERR
,
1887 "error: fragsize %lu != blocksize %u (unsupported)",
1888 sbi
->s_frag_size
, blocksize
);
1891 sbi
->s_frags_per_block
= 1;
1892 sbi
->s_blocks_per_group
= le32_to_cpu(es
->s_blocks_per_group
);
1893 sbi
->s_frags_per_group
= le32_to_cpu(es
->s_frags_per_group
);
1894 sbi
->s_inodes_per_group
= le32_to_cpu(es
->s_inodes_per_group
);
1895 if (EXT3_INODE_SIZE(sb
) == 0 || EXT3_INODES_PER_GROUP(sb
) == 0)
1897 sbi
->s_inodes_per_block
= blocksize
/ EXT3_INODE_SIZE(sb
);
1898 if (sbi
->s_inodes_per_block
== 0)
1900 sbi
->s_itb_per_group
= sbi
->s_inodes_per_group
/
1901 sbi
->s_inodes_per_block
;
1902 sbi
->s_desc_per_block
= blocksize
/ sizeof(struct ext3_group_desc
);
1904 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
1905 sbi
->s_addr_per_block_bits
= ilog2(EXT3_ADDR_PER_BLOCK(sb
));
1906 sbi
->s_desc_per_block_bits
= ilog2(EXT3_DESC_PER_BLOCK(sb
));
1907 for (i
=0; i
< 4; i
++)
1908 sbi
->s_hash_seed
[i
] = le32_to_cpu(es
->s_hash_seed
[i
]);
1909 sbi
->s_def_hash_version
= es
->s_def_hash_version
;
1910 i
= le32_to_cpu(es
->s_flags
);
1911 if (i
& EXT2_FLAGS_UNSIGNED_HASH
)
1912 sbi
->s_hash_unsigned
= 3;
1913 else if ((i
& EXT2_FLAGS_SIGNED_HASH
) == 0) {
1914 #ifdef __CHAR_UNSIGNED__
1915 es
->s_flags
|= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH
);
1916 sbi
->s_hash_unsigned
= 3;
1918 es
->s_flags
|= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH
);
1922 if (sbi
->s_blocks_per_group
> blocksize
* 8) {
1923 ext3_msg(sb
, KERN_ERR
,
1924 "#blocks per group too big: %lu",
1925 sbi
->s_blocks_per_group
);
1928 if (sbi
->s_frags_per_group
> blocksize
* 8) {
1929 ext3_msg(sb
, KERN_ERR
,
1930 "error: #fragments per group too big: %lu",
1931 sbi
->s_frags_per_group
);
1934 if (sbi
->s_inodes_per_group
> blocksize
* 8) {
1935 ext3_msg(sb
, KERN_ERR
,
1936 "error: #inodes per group too big: %lu",
1937 sbi
->s_inodes_per_group
);
1941 err
= generic_check_addressable(sb
->s_blocksize_bits
,
1942 le32_to_cpu(es
->s_blocks_count
));
1944 ext3_msg(sb
, KERN_ERR
,
1945 "error: filesystem is too large to mount safely");
1946 if (sizeof(sector_t
) < 8)
1947 ext3_msg(sb
, KERN_ERR
,
1948 "error: CONFIG_LBDAF not enabled");
1953 if (EXT3_BLOCKS_PER_GROUP(sb
) == 0)
1955 sbi
->s_groups_count
= ((le32_to_cpu(es
->s_blocks_count
) -
1956 le32_to_cpu(es
->s_first_data_block
) - 1)
1957 / EXT3_BLOCKS_PER_GROUP(sb
)) + 1;
1958 db_count
= DIV_ROUND_UP(sbi
->s_groups_count
, EXT3_DESC_PER_BLOCK(sb
));
1959 sbi
->s_group_desc
= kmalloc(db_count
* sizeof (struct buffer_head
*),
1961 if (sbi
->s_group_desc
== NULL
) {
1962 ext3_msg(sb
, KERN_ERR
,
1963 "error: not enough memory");
1968 bgl_lock_init(sbi
->s_blockgroup_lock
);
1970 for (i
= 0; i
< db_count
; i
++) {
1971 block
= descriptor_loc(sb
, logic_sb_block
, i
);
1972 sbi
->s_group_desc
[i
] = sb_bread(sb
, block
);
1973 if (!sbi
->s_group_desc
[i
]) {
1974 ext3_msg(sb
, KERN_ERR
,
1975 "error: can't read group descriptor %d", i
);
1980 if (!ext3_check_descriptors (sb
)) {
1981 ext3_msg(sb
, KERN_ERR
,
1982 "error: group descriptors corrupted");
1985 sbi
->s_gdb_count
= db_count
;
1986 get_random_bytes(&sbi
->s_next_generation
, sizeof(u32
));
1987 spin_lock_init(&sbi
->s_next_gen_lock
);
1989 /* per fileystem reservation list head & lock */
1990 spin_lock_init(&sbi
->s_rsv_window_lock
);
1991 sbi
->s_rsv_window_root
= RB_ROOT
;
1992 /* Add a single, static dummy reservation to the start of the
1993 * reservation window list --- it gives us a placeholder for
1994 * append-at-start-of-list which makes the allocation logic
1995 * _much_ simpler. */
1996 sbi
->s_rsv_window_head
.rsv_start
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1997 sbi
->s_rsv_window_head
.rsv_end
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1998 sbi
->s_rsv_window_head
.rsv_alloc_hit
= 0;
1999 sbi
->s_rsv_window_head
.rsv_goal_size
= 0;
2000 ext3_rsv_window_add(sb
, &sbi
->s_rsv_window_head
);
2003 * set up enough so that it can read an inode
2005 sb
->s_op
= &ext3_sops
;
2006 sb
->s_export_op
= &ext3_export_ops
;
2007 sb
->s_xattr
= ext3_xattr_handlers
;
2009 sb
->s_qcop
= &ext3_qctl_operations
;
2010 sb
->dq_op
= &ext3_quota_operations
;
2012 memcpy(sb
->s_uuid
, es
->s_uuid
, sizeof(es
->s_uuid
));
2013 INIT_LIST_HEAD(&sbi
->s_orphan
); /* unlinked but open files */
2014 mutex_init(&sbi
->s_orphan_lock
);
2015 mutex_init(&sbi
->s_resize_lock
);
2019 needs_recovery
= (es
->s_last_orphan
!= 0 ||
2020 EXT3_HAS_INCOMPAT_FEATURE(sb
,
2021 EXT3_FEATURE_INCOMPAT_RECOVER
));
2024 * The first inode we look at is the journal inode. Don't try
2025 * root first: it may be modified in the journal!
2027 if (!test_opt(sb
, NOLOAD
) &&
2028 EXT3_HAS_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
)) {
2029 if (ext3_load_journal(sb
, es
, journal_devnum
))
2031 } else if (journal_inum
) {
2032 if (ext3_create_journal(sb
, es
, journal_inum
))
2036 ext3_msg(sb
, KERN_ERR
,
2037 "error: no journal found. "
2038 "mounting ext3 over ext2?");
2041 err
= percpu_counter_init(&sbi
->s_freeblocks_counter
,
2042 ext3_count_free_blocks(sb
));
2044 err
= percpu_counter_init(&sbi
->s_freeinodes_counter
,
2045 ext3_count_free_inodes(sb
));
2048 err
= percpu_counter_init(&sbi
->s_dirs_counter
,
2049 ext3_count_dirs(sb
));
2052 ext3_msg(sb
, KERN_ERR
, "error: insufficient memory");
2057 /* We have now updated the journal if required, so we can
2058 * validate the data journaling mode. */
2059 switch (test_opt(sb
, DATA_FLAGS
)) {
2061 /* No mode set, assume a default based on the journal
2062 capabilities: ORDERED_DATA if the journal can
2063 cope, else JOURNAL_DATA */
2064 if (journal_check_available_features
2065 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
))
2066 set_opt(sbi
->s_mount_opt
, DEFAULT_DATA_MODE
);
2068 set_opt(sbi
->s_mount_opt
, JOURNAL_DATA
);
2071 case EXT3_MOUNT_ORDERED_DATA
:
2072 case EXT3_MOUNT_WRITEBACK_DATA
:
2073 if (!journal_check_available_features
2074 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
)) {
2075 ext3_msg(sb
, KERN_ERR
,
2076 "error: journal does not support "
2077 "requested data journaling mode");
2085 * The journal_load will have done any necessary log recovery,
2086 * so we can safely mount the rest of the filesystem now.
2089 root
= ext3_iget(sb
, EXT3_ROOT_INO
);
2091 ext3_msg(sb
, KERN_ERR
, "error: get root inode failed");
2092 ret
= PTR_ERR(root
);
2095 if (!S_ISDIR(root
->i_mode
) || !root
->i_blocks
|| !root
->i_size
) {
2097 ext3_msg(sb
, KERN_ERR
, "error: corrupt root inode, run e2fsck");
2100 sb
->s_root
= d_make_root(root
);
2102 ext3_msg(sb
, KERN_ERR
, "error: get root dentry failed");
2107 if (ext3_setup_super(sb
, es
, sb
->s_flags
& MS_RDONLY
))
2108 sb
->s_flags
|= MS_RDONLY
;
2110 EXT3_SB(sb
)->s_mount_state
|= EXT3_ORPHAN_FS
;
2111 ext3_orphan_cleanup(sb
, es
);
2112 EXT3_SB(sb
)->s_mount_state
&= ~EXT3_ORPHAN_FS
;
2113 if (needs_recovery
) {
2114 ext3_mark_recovery_complete(sb
, es
);
2115 ext3_msg(sb
, KERN_INFO
, "recovery complete");
2117 ext3_msg(sb
, KERN_INFO
, "mounted filesystem with %s data mode",
2118 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_JOURNAL_DATA
? "journal":
2119 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_ORDERED_DATA
? "ordered":
2126 ext3_msg(sb
, KERN_INFO
,
2127 "error: can't find ext3 filesystem on dev %s.",
2132 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
2133 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
2134 percpu_counter_destroy(&sbi
->s_dirs_counter
);
2135 journal_destroy(sbi
->s_journal
);
2137 for (i
= 0; i
< db_count
; i
++)
2138 brelse(sbi
->s_group_desc
[i
]);
2139 kfree(sbi
->s_group_desc
);
2142 for (i
= 0; i
< MAXQUOTAS
; i
++)
2143 kfree(sbi
->s_qf_names
[i
]);
2145 ext3_blkdev_remove(sbi
);
2148 sb
->s_fs_info
= NULL
;
2149 kfree(sbi
->s_blockgroup_lock
);
2155 * Setup any per-fs journal parameters now. We'll do this both on
2156 * initial mount, once the journal has been initialised but before we've
2157 * done any recovery; and again on any subsequent remount.
2159 static void ext3_init_journal_params(struct super_block
*sb
, journal_t
*journal
)
2161 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2163 if (sbi
->s_commit_interval
)
2164 journal
->j_commit_interval
= sbi
->s_commit_interval
;
2165 /* We could also set up an ext3-specific default for the commit
2166 * interval here, but for now we'll just fall back to the jbd
2169 spin_lock(&journal
->j_state_lock
);
2170 if (test_opt(sb
, BARRIER
))
2171 journal
->j_flags
|= JFS_BARRIER
;
2173 journal
->j_flags
&= ~JFS_BARRIER
;
2174 if (test_opt(sb
, DATA_ERR_ABORT
))
2175 journal
->j_flags
|= JFS_ABORT_ON_SYNCDATA_ERR
;
2177 journal
->j_flags
&= ~JFS_ABORT_ON_SYNCDATA_ERR
;
2178 spin_unlock(&journal
->j_state_lock
);
2181 static journal_t
*ext3_get_journal(struct super_block
*sb
,
2182 unsigned int journal_inum
)
2184 struct inode
*journal_inode
;
2187 /* First, test for the existence of a valid inode on disk. Bad
2188 * things happen if we iget() an unused inode, as the subsequent
2189 * iput() will try to delete it. */
2191 journal_inode
= ext3_iget(sb
, journal_inum
);
2192 if (IS_ERR(journal_inode
)) {
2193 ext3_msg(sb
, KERN_ERR
, "error: no journal found");
2196 if (!journal_inode
->i_nlink
) {
2197 make_bad_inode(journal_inode
);
2198 iput(journal_inode
);
2199 ext3_msg(sb
, KERN_ERR
, "error: journal inode is deleted");
2203 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2204 journal_inode
, journal_inode
->i_size
);
2205 if (!S_ISREG(journal_inode
->i_mode
)) {
2206 ext3_msg(sb
, KERN_ERR
, "error: invalid journal inode");
2207 iput(journal_inode
);
2211 journal
= journal_init_inode(journal_inode
);
2213 ext3_msg(sb
, KERN_ERR
, "error: could not load journal inode");
2214 iput(journal_inode
);
2217 journal
->j_private
= sb
;
2218 ext3_init_journal_params(sb
, journal
);
2222 static journal_t
*ext3_get_dev_journal(struct super_block
*sb
,
2225 struct buffer_head
* bh
;
2229 int hblock
, blocksize
;
2230 ext3_fsblk_t sb_block
;
2231 unsigned long offset
;
2232 struct ext3_super_block
* es
;
2233 struct block_device
*bdev
;
2235 bdev
= ext3_blkdev_get(j_dev
, sb
);
2239 blocksize
= sb
->s_blocksize
;
2240 hblock
= bdev_logical_block_size(bdev
);
2241 if (blocksize
< hblock
) {
2242 ext3_msg(sb
, KERN_ERR
,
2243 "error: blocksize too small for journal device");
2247 sb_block
= EXT3_MIN_BLOCK_SIZE
/ blocksize
;
2248 offset
= EXT3_MIN_BLOCK_SIZE
% blocksize
;
2249 set_blocksize(bdev
, blocksize
);
2250 if (!(bh
= __bread(bdev
, sb_block
, blocksize
))) {
2251 ext3_msg(sb
, KERN_ERR
, "error: couldn't read superblock of "
2252 "external journal");
2256 es
= (struct ext3_super_block
*) (bh
->b_data
+ offset
);
2257 if ((le16_to_cpu(es
->s_magic
) != EXT3_SUPER_MAGIC
) ||
2258 !(le32_to_cpu(es
->s_feature_incompat
) &
2259 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV
)) {
2260 ext3_msg(sb
, KERN_ERR
, "error: external journal has "
2266 if (memcmp(EXT3_SB(sb
)->s_es
->s_journal_uuid
, es
->s_uuid
, 16)) {
2267 ext3_msg(sb
, KERN_ERR
, "error: journal UUID does not match");
2272 len
= le32_to_cpu(es
->s_blocks_count
);
2273 start
= sb_block
+ 1;
2274 brelse(bh
); /* we're done with the superblock */
2276 journal
= journal_init_dev(bdev
, sb
->s_bdev
,
2277 start
, len
, blocksize
);
2279 ext3_msg(sb
, KERN_ERR
,
2280 "error: failed to create device journal");
2283 journal
->j_private
= sb
;
2284 if (!bh_uptodate_or_lock(journal
->j_sb_buffer
)) {
2285 if (bh_submit_read(journal
->j_sb_buffer
)) {
2286 ext3_msg(sb
, KERN_ERR
, "I/O error on journal device");
2290 if (be32_to_cpu(journal
->j_superblock
->s_nr_users
) != 1) {
2291 ext3_msg(sb
, KERN_ERR
,
2292 "error: external journal has more than one "
2293 "user (unsupported) - %d",
2294 be32_to_cpu(journal
->j_superblock
->s_nr_users
));
2297 EXT3_SB(sb
)->journal_bdev
= bdev
;
2298 ext3_init_journal_params(sb
, journal
);
2301 journal_destroy(journal
);
2303 ext3_blkdev_put(bdev
);
2307 static int ext3_load_journal(struct super_block
*sb
,
2308 struct ext3_super_block
*es
,
2309 unsigned long journal_devnum
)
2312 unsigned int journal_inum
= le32_to_cpu(es
->s_journal_inum
);
2315 int really_read_only
;
2317 if (journal_devnum
&&
2318 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2319 ext3_msg(sb
, KERN_INFO
, "external journal device major/minor "
2320 "numbers have changed");
2321 journal_dev
= new_decode_dev(journal_devnum
);
2323 journal_dev
= new_decode_dev(le32_to_cpu(es
->s_journal_dev
));
2325 really_read_only
= bdev_read_only(sb
->s_bdev
);
2328 * Are we loading a blank journal or performing recovery after a
2329 * crash? For recovery, we need to check in advance whether we
2330 * can get read-write access to the device.
2333 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
)) {
2334 if (sb
->s_flags
& MS_RDONLY
) {
2335 ext3_msg(sb
, KERN_INFO
,
2336 "recovery required on readonly filesystem");
2337 if (really_read_only
) {
2338 ext3_msg(sb
, KERN_ERR
, "error: write access "
2339 "unavailable, cannot proceed");
2342 ext3_msg(sb
, KERN_INFO
,
2343 "write access will be enabled during recovery");
2347 if (journal_inum
&& journal_dev
) {
2348 ext3_msg(sb
, KERN_ERR
, "error: filesystem has both journal "
2349 "and inode journals");
2354 if (!(journal
= ext3_get_journal(sb
, journal_inum
)))
2357 if (!(journal
= ext3_get_dev_journal(sb
, journal_dev
)))
2361 if (!(journal
->j_flags
& JFS_BARRIER
))
2362 printk(KERN_INFO
"EXT3-fs: barriers not enabled\n");
2364 if (!really_read_only
&& test_opt(sb
, UPDATE_JOURNAL
)) {
2365 err
= journal_update_format(journal
);
2367 ext3_msg(sb
, KERN_ERR
, "error updating journal");
2368 journal_destroy(journal
);
2373 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
))
2374 err
= journal_wipe(journal
, !really_read_only
);
2376 err
= journal_load(journal
);
2379 ext3_msg(sb
, KERN_ERR
, "error loading journal");
2380 journal_destroy(journal
);
2384 EXT3_SB(sb
)->s_journal
= journal
;
2385 ext3_clear_journal_err(sb
, es
);
2387 if (!really_read_only
&& journal_devnum
&&
2388 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2389 es
->s_journal_dev
= cpu_to_le32(journal_devnum
);
2391 /* Make sure we flush the recovery flag to disk. */
2392 ext3_commit_super(sb
, es
, 1);
2398 static int ext3_create_journal(struct super_block
*sb
,
2399 struct ext3_super_block
*es
,
2400 unsigned int journal_inum
)
2405 if (sb
->s_flags
& MS_RDONLY
) {
2406 ext3_msg(sb
, KERN_ERR
,
2407 "error: readonly filesystem when trying to "
2412 journal
= ext3_get_journal(sb
, journal_inum
);
2416 ext3_msg(sb
, KERN_INFO
, "creating new journal on inode %u",
2419 err
= journal_create(journal
);
2421 ext3_msg(sb
, KERN_ERR
, "error creating journal");
2422 journal_destroy(journal
);
2426 EXT3_SB(sb
)->s_journal
= journal
;
2428 ext3_update_dynamic_rev(sb
);
2429 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2430 EXT3_SET_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
);
2432 es
->s_journal_inum
= cpu_to_le32(journal_inum
);
2434 /* Make sure we flush the recovery flag to disk. */
2435 ext3_commit_super(sb
, es
, 1);
2440 static int ext3_commit_super(struct super_block
*sb
,
2441 struct ext3_super_block
*es
,
2444 struct buffer_head
*sbh
= EXT3_SB(sb
)->s_sbh
;
2450 if (buffer_write_io_error(sbh
)) {
2452 * Oh, dear. A previous attempt to write the
2453 * superblock failed. This could happen because the
2454 * USB device was yanked out. Or it could happen to
2455 * be a transient write error and maybe the block will
2456 * be remapped. Nothing we can do but to retry the
2457 * write and hope for the best.
2459 ext3_msg(sb
, KERN_ERR
, "previous I/O error to "
2460 "superblock detected");
2461 clear_buffer_write_io_error(sbh
);
2462 set_buffer_uptodate(sbh
);
2465 * If the file system is mounted read-only, don't update the
2466 * superblock write time. This avoids updating the superblock
2467 * write time when we are mounting the root file system
2468 * read/only but we need to replay the journal; at that point,
2469 * for people who are east of GMT and who make their clock
2470 * tick in localtime for Windows bug-for-bug compatibility,
2471 * the clock is set in the future, and this will cause e2fsck
2472 * to complain and force a full file system check.
2474 if (!(sb
->s_flags
& MS_RDONLY
))
2475 es
->s_wtime
= cpu_to_le32(get_seconds());
2476 es
->s_free_blocks_count
= cpu_to_le32(ext3_count_free_blocks(sb
));
2477 es
->s_free_inodes_count
= cpu_to_le32(ext3_count_free_inodes(sb
));
2478 BUFFER_TRACE(sbh
, "marking dirty");
2479 mark_buffer_dirty(sbh
);
2481 error
= sync_dirty_buffer(sbh
);
2482 if (buffer_write_io_error(sbh
)) {
2483 ext3_msg(sb
, KERN_ERR
, "I/O error while writing "
2485 clear_buffer_write_io_error(sbh
);
2486 set_buffer_uptodate(sbh
);
2494 * Have we just finished recovery? If so, and if we are mounting (or
2495 * remounting) the filesystem readonly, then we will end up with a
2496 * consistent fs on disk. Record that fact.
2498 static void ext3_mark_recovery_complete(struct super_block
* sb
,
2499 struct ext3_super_block
* es
)
2501 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
2503 journal_lock_updates(journal
);
2504 if (journal_flush(journal
) < 0)
2507 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
) &&
2508 sb
->s_flags
& MS_RDONLY
) {
2509 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2510 ext3_commit_super(sb
, es
, 1);
2514 journal_unlock_updates(journal
);
2518 * If we are mounting (or read-write remounting) a filesystem whose journal
2519 * has recorded an error from a previous lifetime, move that error to the
2520 * main filesystem now.
2522 static void ext3_clear_journal_err(struct super_block
*sb
,
2523 struct ext3_super_block
*es
)
2529 journal
= EXT3_SB(sb
)->s_journal
;
2532 * Now check for any error status which may have been recorded in the
2533 * journal by a prior ext3_error() or ext3_abort()
2536 j_errno
= journal_errno(journal
);
2540 errstr
= ext3_decode_error(sb
, j_errno
, nbuf
);
2541 ext3_warning(sb
, __func__
, "Filesystem error recorded "
2542 "from previous mount: %s", errstr
);
2543 ext3_warning(sb
, __func__
, "Marking fs in need of "
2544 "filesystem check.");
2546 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
2547 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
2548 ext3_commit_super (sb
, es
, 1);
2550 journal_clear_err(journal
);
2555 * Force the running and committing transactions to commit,
2556 * and wait on the commit.
2558 int ext3_force_commit(struct super_block
*sb
)
2563 if (sb
->s_flags
& MS_RDONLY
)
2566 journal
= EXT3_SB(sb
)->s_journal
;
2567 ret
= ext3_journal_force_commit(journal
);
2571 static int ext3_sync_fs(struct super_block
*sb
, int wait
)
2575 trace_ext3_sync_fs(sb
, wait
);
2577 * Writeback quota in non-journalled quota case - journalled quota has
2580 dquot_writeback_dquots(sb
, -1);
2581 if (journal_start_commit(EXT3_SB(sb
)->s_journal
, &target
)) {
2583 log_wait_commit(EXT3_SB(sb
)->s_journal
, target
);
2589 * LVM calls this function before a (read-only) snapshot is created. This
2590 * gives us a chance to flush the journal completely and mark the fs clean.
2592 static int ext3_freeze(struct super_block
*sb
)
2597 if (!(sb
->s_flags
& MS_RDONLY
)) {
2598 journal
= EXT3_SB(sb
)->s_journal
;
2600 /* Now we set up the journal barrier. */
2601 journal_lock_updates(journal
);
2604 * We don't want to clear needs_recovery flag when we failed
2605 * to flush the journal.
2607 error
= journal_flush(journal
);
2611 /* Journal blocked and flushed, clear needs_recovery flag. */
2612 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2613 error
= ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2620 journal_unlock_updates(journal
);
2625 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2626 * flag here, even though the filesystem is not technically dirty yet.
2628 static int ext3_unfreeze(struct super_block
*sb
)
2630 if (!(sb
->s_flags
& MS_RDONLY
)) {
2631 /* Reser the needs_recovery flag before the fs is unlocked. */
2632 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2633 ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2634 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2639 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
)
2641 struct ext3_super_block
* es
;
2642 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2643 ext3_fsblk_t n_blocks_count
= 0;
2644 unsigned long old_sb_flags
;
2645 struct ext3_mount_options old_opts
;
2646 int enable_quota
= 0;
2652 /* Store the original options */
2653 old_sb_flags
= sb
->s_flags
;
2654 old_opts
.s_mount_opt
= sbi
->s_mount_opt
;
2655 old_opts
.s_resuid
= sbi
->s_resuid
;
2656 old_opts
.s_resgid
= sbi
->s_resgid
;
2657 old_opts
.s_commit_interval
= sbi
->s_commit_interval
;
2659 old_opts
.s_jquota_fmt
= sbi
->s_jquota_fmt
;
2660 for (i
= 0; i
< MAXQUOTAS
; i
++)
2661 if (sbi
->s_qf_names
[i
]) {
2662 old_opts
.s_qf_names
[i
] = kstrdup(sbi
->s_qf_names
[i
],
2664 if (!old_opts
.s_qf_names
[i
]) {
2667 for (j
= 0; j
< i
; j
++)
2668 kfree(old_opts
.s_qf_names
[j
]);
2672 old_opts
.s_qf_names
[i
] = NULL
;
2676 * Allow the "check" option to be passed as a remount option.
2678 if (!parse_options(data
, sb
, NULL
, NULL
, &n_blocks_count
, 1)) {
2683 if (test_opt(sb
, ABORT
))
2684 ext3_abort(sb
, __func__
, "Abort forced by user");
2686 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
2687 (test_opt(sb
, POSIX_ACL
) ? MS_POSIXACL
: 0);
2691 ext3_init_journal_params(sb
, sbi
->s_journal
);
2693 if ((*flags
& MS_RDONLY
) != (sb
->s_flags
& MS_RDONLY
) ||
2694 n_blocks_count
> le32_to_cpu(es
->s_blocks_count
)) {
2695 if (test_opt(sb
, ABORT
)) {
2700 if (*flags
& MS_RDONLY
) {
2701 err
= dquot_suspend(sb
, -1);
2706 * First of all, the unconditional stuff we have to do
2707 * to disable replay of the journal when we next remount
2709 sb
->s_flags
|= MS_RDONLY
;
2712 * OK, test if we are remounting a valid rw partition
2713 * readonly, and if so set the rdonly flag and then
2714 * mark the partition as valid again.
2716 if (!(es
->s_state
& cpu_to_le16(EXT3_VALID_FS
)) &&
2717 (sbi
->s_mount_state
& EXT3_VALID_FS
))
2718 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
2720 ext3_mark_recovery_complete(sb
, es
);
2723 if ((ret
= EXT3_HAS_RO_COMPAT_FEATURE(sb
,
2724 ~EXT3_FEATURE_RO_COMPAT_SUPP
))) {
2725 ext3_msg(sb
, KERN_WARNING
,
2726 "warning: couldn't remount RDWR "
2727 "because of unsupported optional "
2728 "features (%x)", le32_to_cpu(ret
));
2734 * If we have an unprocessed orphan list hanging
2735 * around from a previously readonly bdev mount,
2736 * require a full umount & mount for now.
2738 if (es
->s_last_orphan
) {
2739 ext3_msg(sb
, KERN_WARNING
, "warning: couldn't "
2740 "remount RDWR because of unprocessed "
2741 "orphan inode list. Please "
2742 "umount & mount instead.");
2748 * Mounting a RDONLY partition read-write, so reread
2749 * and store the current valid flag. (It may have
2750 * been changed by e2fsck since we originally mounted
2753 ext3_clear_journal_err(sb
, es
);
2754 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
2755 if ((err
= ext3_group_extend(sb
, es
, n_blocks_count
)))
2757 if (!ext3_setup_super (sb
, es
, 0))
2758 sb
->s_flags
&= ~MS_RDONLY
;
2763 /* Release old quota file names */
2764 for (i
= 0; i
< MAXQUOTAS
; i
++)
2765 kfree(old_opts
.s_qf_names
[i
]);
2768 dquot_resume(sb
, -1);
2771 sb
->s_flags
= old_sb_flags
;
2772 sbi
->s_mount_opt
= old_opts
.s_mount_opt
;
2773 sbi
->s_resuid
= old_opts
.s_resuid
;
2774 sbi
->s_resgid
= old_opts
.s_resgid
;
2775 sbi
->s_commit_interval
= old_opts
.s_commit_interval
;
2777 sbi
->s_jquota_fmt
= old_opts
.s_jquota_fmt
;
2778 for (i
= 0; i
< MAXQUOTAS
; i
++) {
2779 kfree(sbi
->s_qf_names
[i
]);
2780 sbi
->s_qf_names
[i
] = old_opts
.s_qf_names
[i
];
2786 static int ext3_statfs (struct dentry
* dentry
, struct kstatfs
* buf
)
2788 struct super_block
*sb
= dentry
->d_sb
;
2789 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2790 struct ext3_super_block
*es
= sbi
->s_es
;
2793 if (test_opt(sb
, MINIX_DF
)) {
2794 sbi
->s_overhead_last
= 0;
2795 } else if (sbi
->s_blocks_last
!= le32_to_cpu(es
->s_blocks_count
)) {
2796 unsigned long ngroups
= sbi
->s_groups_count
, i
;
2797 ext3_fsblk_t overhead
= 0;
2801 * Compute the overhead (FS structures). This is constant
2802 * for a given filesystem unless the number of block groups
2803 * changes so we cache the previous value until it does.
2807 * All of the blocks before first_data_block are
2810 overhead
= le32_to_cpu(es
->s_first_data_block
);
2813 * Add the overhead attributed to the superblock and
2814 * block group descriptors. If the sparse superblocks
2815 * feature is turned on, then not all groups have this.
2817 for (i
= 0; i
< ngroups
; i
++) {
2818 overhead
+= ext3_bg_has_super(sb
, i
) +
2819 ext3_bg_num_gdb(sb
, i
);
2824 * Every block group has an inode bitmap, a block
2825 * bitmap, and an inode table.
2827 overhead
+= ngroups
* (2 + sbi
->s_itb_per_group
);
2829 /* Add the journal blocks as well */
2830 overhead
+= sbi
->s_journal
->j_maxlen
;
2832 sbi
->s_overhead_last
= overhead
;
2834 sbi
->s_blocks_last
= le32_to_cpu(es
->s_blocks_count
);
2837 buf
->f_type
= EXT3_SUPER_MAGIC
;
2838 buf
->f_bsize
= sb
->s_blocksize
;
2839 buf
->f_blocks
= le32_to_cpu(es
->s_blocks_count
) - sbi
->s_overhead_last
;
2840 buf
->f_bfree
= percpu_counter_sum_positive(&sbi
->s_freeblocks_counter
);
2841 buf
->f_bavail
= buf
->f_bfree
- le32_to_cpu(es
->s_r_blocks_count
);
2842 if (buf
->f_bfree
< le32_to_cpu(es
->s_r_blocks_count
))
2844 buf
->f_files
= le32_to_cpu(es
->s_inodes_count
);
2845 buf
->f_ffree
= percpu_counter_sum_positive(&sbi
->s_freeinodes_counter
);
2846 buf
->f_namelen
= EXT3_NAME_LEN
;
2847 fsid
= le64_to_cpup((void *)es
->s_uuid
) ^
2848 le64_to_cpup((void *)es
->s_uuid
+ sizeof(u64
));
2849 buf
->f_fsid
.val
[0] = fsid
& 0xFFFFFFFFUL
;
2850 buf
->f_fsid
.val
[1] = (fsid
>> 32) & 0xFFFFFFFFUL
;
2854 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2855 * is locked for write. Otherwise the are possible deadlocks:
2856 * Process 1 Process 2
2857 * ext3_create() quota_sync()
2858 * journal_start() write_dquot()
2859 * dquot_initialize() down(dqio_mutex)
2860 * down(dqio_mutex) journal_start()
2866 static inline struct inode
*dquot_to_inode(struct dquot
*dquot
)
2868 return sb_dqopt(dquot
->dq_sb
)->files
[dquot
->dq_id
.type
];
2871 static int ext3_write_dquot(struct dquot
*dquot
)
2875 struct inode
*inode
;
2877 inode
= dquot_to_inode(dquot
);
2878 handle
= ext3_journal_start(inode
,
2879 EXT3_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
2881 return PTR_ERR(handle
);
2882 ret
= dquot_commit(dquot
);
2883 err
= ext3_journal_stop(handle
);
2889 static int ext3_acquire_dquot(struct dquot
*dquot
)
2894 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2895 EXT3_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
2897 return PTR_ERR(handle
);
2898 ret
= dquot_acquire(dquot
);
2899 err
= ext3_journal_stop(handle
);
2905 static int ext3_release_dquot(struct dquot
*dquot
)
2910 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2911 EXT3_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
2912 if (IS_ERR(handle
)) {
2913 /* Release dquot anyway to avoid endless cycle in dqput() */
2914 dquot_release(dquot
);
2915 return PTR_ERR(handle
);
2917 ret
= dquot_release(dquot
);
2918 err
= ext3_journal_stop(handle
);
2924 static int ext3_mark_dquot_dirty(struct dquot
*dquot
)
2926 /* Are we journaling quotas? */
2927 if (EXT3_SB(dquot
->dq_sb
)->s_qf_names
[USRQUOTA
] ||
2928 EXT3_SB(dquot
->dq_sb
)->s_qf_names
[GRPQUOTA
]) {
2929 dquot_mark_dquot_dirty(dquot
);
2930 return ext3_write_dquot(dquot
);
2932 return dquot_mark_dquot_dirty(dquot
);
2936 static int ext3_write_info(struct super_block
*sb
, int type
)
2941 /* Data block + inode block */
2942 handle
= ext3_journal_start(sb
->s_root
->d_inode
, 2);
2944 return PTR_ERR(handle
);
2945 ret
= dquot_commit_info(sb
, type
);
2946 err
= ext3_journal_stop(handle
);
2953 * Turn on quotas during mount time - we need to find
2954 * the quota file and such...
2956 static int ext3_quota_on_mount(struct super_block
*sb
, int type
)
2958 return dquot_quota_on_mount(sb
, EXT3_SB(sb
)->s_qf_names
[type
],
2959 EXT3_SB(sb
)->s_jquota_fmt
, type
);
2963 * Standard function to be called on quota_on
2965 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
2970 if (!test_opt(sb
, QUOTA
))
2973 /* Quotafile not on the same filesystem? */
2974 if (path
->dentry
->d_sb
!= sb
)
2976 /* Journaling quota? */
2977 if (EXT3_SB(sb
)->s_qf_names
[type
]) {
2978 /* Quotafile not of fs root? */
2979 if (path
->dentry
->d_parent
!= sb
->s_root
)
2980 ext3_msg(sb
, KERN_WARNING
,
2981 "warning: Quota file not on filesystem root. "
2982 "Journaled quota will not work.");
2986 * When we journal data on quota file, we have to flush journal to see
2987 * all updates to the file when we bypass pagecache...
2989 if (ext3_should_journal_data(path
->dentry
->d_inode
)) {
2991 * We don't need to lock updates but journal_flush() could
2992 * otherwise be livelocked...
2994 journal_lock_updates(EXT3_SB(sb
)->s_journal
);
2995 err
= journal_flush(EXT3_SB(sb
)->s_journal
);
2996 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
3001 return dquot_quota_on(sb
, type
, format_id
, path
);
3004 /* Read data from quotafile - avoid pagecache and such because we cannot afford
3005 * acquiring the locks... As quota files are never truncated and quota code
3006 * itself serializes the operations (and no one else should touch the files)
3007 * we don't have to be afraid of races */
3008 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
3009 size_t len
, loff_t off
)
3011 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
3012 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
3014 int offset
= off
& (sb
->s_blocksize
- 1);
3017 struct buffer_head
*bh
;
3018 loff_t i_size
= i_size_read(inode
);
3022 if (off
+len
> i_size
)
3025 while (toread
> 0) {
3026 tocopy
= sb
->s_blocksize
- offset
< toread
?
3027 sb
->s_blocksize
- offset
: toread
;
3028 bh
= ext3_bread(NULL
, inode
, blk
, 0, &err
);
3031 if (!bh
) /* A hole? */
3032 memset(data
, 0, tocopy
);
3034 memcpy(data
, bh
->b_data
+offset
, tocopy
);
3044 /* Write to quotafile (we know the transaction is already started and has
3045 * enough credits) */
3046 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
3047 const char *data
, size_t len
, loff_t off
)
3049 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
3050 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
3052 int offset
= off
& (sb
->s_blocksize
- 1);
3053 int journal_quota
= EXT3_SB(sb
)->s_qf_names
[type
] != NULL
;
3054 struct buffer_head
*bh
;
3055 handle_t
*handle
= journal_current_handle();
3058 ext3_msg(sb
, KERN_WARNING
,
3059 "warning: quota write (off=%llu, len=%llu)"
3060 " cancelled because transaction is not started.",
3061 (unsigned long long)off
, (unsigned long long)len
);
3066 * Since we account only one data block in transaction credits,
3067 * then it is impossible to cross a block boundary.
3069 if (sb
->s_blocksize
- offset
< len
) {
3070 ext3_msg(sb
, KERN_WARNING
, "Quota write (off=%llu, len=%llu)"
3071 " cancelled because not block aligned",
3072 (unsigned long long)off
, (unsigned long long)len
);
3075 bh
= ext3_bread(handle
, inode
, blk
, 1, &err
);
3078 if (journal_quota
) {
3079 err
= ext3_journal_get_write_access(handle
, bh
);
3086 memcpy(bh
->b_data
+offset
, data
, len
);
3087 flush_dcache_page(bh
->b_page
);
3090 err
= ext3_journal_dirty_metadata(handle
, bh
);
3092 /* Always do at least ordered writes for quotas */
3093 err
= ext3_journal_dirty_data(handle
, bh
);
3094 mark_buffer_dirty(bh
);
3100 if (inode
->i_size
< off
+ len
) {
3101 i_size_write(inode
, off
+ len
);
3102 EXT3_I(inode
)->i_disksize
= inode
->i_size
;
3105 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
3106 ext3_mark_inode_dirty(handle
, inode
);
3112 static struct dentry
*ext3_mount(struct file_system_type
*fs_type
,
3113 int flags
, const char *dev_name
, void *data
)
3115 return mount_bdev(fs_type
, flags
, dev_name
, data
, ext3_fill_super
);
3118 static struct file_system_type ext3_fs_type
= {
3119 .owner
= THIS_MODULE
,
3121 .mount
= ext3_mount
,
3122 .kill_sb
= kill_block_super
,
3123 .fs_flags
= FS_REQUIRES_DEV
,
3125 MODULE_ALIAS_FS("ext3");
3127 static int __init
init_ext3_fs(void)
3129 int err
= init_ext3_xattr();
3132 err
= init_inodecache();
3135 err
= register_filesystem(&ext3_fs_type
);
3140 destroy_inodecache();
3146 static void __exit
exit_ext3_fs(void)
3148 unregister_filesystem(&ext3_fs_type
);
3149 destroy_inodecache();
3153 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3154 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3155 MODULE_LICENSE("GPL");
3156 module_init(init_ext3_fs
)
3157 module_exit(exit_ext3_fs
)