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>
31 #include <asm/uaccess.h>
33 #define CREATE_TRACE_POINTS
40 #ifdef CONFIG_EXT3_DEFAULTS_TO_ORDERED
41 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_ORDERED_DATA
43 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_WRITEBACK_DATA
46 static int ext3_load_journal(struct super_block
*, struct ext3_super_block
*,
47 unsigned long journal_devnum
);
48 static int ext3_create_journal(struct super_block
*, struct ext3_super_block
*,
50 static int ext3_commit_super(struct super_block
*sb
,
51 struct ext3_super_block
*es
,
53 static void ext3_mark_recovery_complete(struct super_block
* sb
,
54 struct ext3_super_block
* es
);
55 static void ext3_clear_journal_err(struct super_block
* sb
,
56 struct ext3_super_block
* es
);
57 static int ext3_sync_fs(struct super_block
*sb
, int wait
);
58 static const char *ext3_decode_error(struct super_block
* sb
, int errno
,
60 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
);
61 static int ext3_statfs (struct dentry
* dentry
, struct kstatfs
* buf
);
62 static int ext3_unfreeze(struct super_block
*sb
);
63 static int ext3_freeze(struct super_block
*sb
);
66 * Wrappers for journal_start/end.
68 handle_t
*ext3_journal_start_sb(struct super_block
*sb
, int nblocks
)
72 if (sb
->s_flags
& MS_RDONLY
)
73 return ERR_PTR(-EROFS
);
75 /* Special case here: if the journal has aborted behind our
76 * backs (eg. EIO in the commit thread), then we still need to
77 * take the FS itself readonly cleanly. */
78 journal
= EXT3_SB(sb
)->s_journal
;
79 if (is_journal_aborted(journal
)) {
80 ext3_abort(sb
, __func__
,
81 "Detected aborted journal");
82 return ERR_PTR(-EROFS
);
85 return journal_start(journal
, nblocks
);
88 int __ext3_journal_stop(const char *where
, handle_t
*handle
)
90 struct super_block
*sb
;
94 sb
= handle
->h_transaction
->t_journal
->j_private
;
96 rc
= journal_stop(handle
);
101 __ext3_std_error(sb
, where
, err
);
105 void ext3_journal_abort_handle(const char *caller
, const char *err_fn
,
106 struct buffer_head
*bh
, handle_t
*handle
, int err
)
109 const char *errstr
= ext3_decode_error(NULL
, err
, nbuf
);
112 BUFFER_TRACE(bh
, "abort");
117 if (is_handle_aborted(handle
))
120 printk(KERN_ERR
"EXT3-fs: %s: aborting transaction: %s in %s\n",
121 caller
, errstr
, err_fn
);
123 journal_abort_handle(handle
);
126 void ext3_msg(struct super_block
*sb
, const char *prefix
,
127 const char *fmt
, ...)
129 struct va_format vaf
;
137 printk("%sEXT3-fs (%s): %pV\n", prefix
, sb
->s_id
, &vaf
);
142 /* Deal with the reporting of failure conditions on a filesystem such as
143 * inconsistencies detected or read IO failures.
145 * On ext2, we can store the error state of the filesystem in the
146 * superblock. That is not possible on ext3, because we may have other
147 * write ordering constraints on the superblock which prevent us from
148 * writing it out straight away; and given that the journal is about to
149 * be aborted, we can't rely on the current, or future, transactions to
150 * write out the superblock safely.
152 * We'll just use the journal_abort() error code to record an error in
153 * the journal instead. On recovery, the journal will complain about
154 * that error until we've noted it down and cleared it.
157 static void ext3_handle_error(struct super_block
*sb
)
159 struct ext3_super_block
*es
= EXT3_SB(sb
)->s_es
;
161 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
162 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
164 if (sb
->s_flags
& MS_RDONLY
)
167 if (!test_opt (sb
, ERRORS_CONT
)) {
168 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
170 set_opt(EXT3_SB(sb
)->s_mount_opt
, ABORT
);
172 journal_abort(journal
, -EIO
);
174 if (test_opt (sb
, ERRORS_RO
)) {
175 ext3_msg(sb
, KERN_CRIT
,
176 "error: remounting filesystem read-only");
177 sb
->s_flags
|= MS_RDONLY
;
179 ext3_commit_super(sb
, es
, 1);
180 if (test_opt(sb
, ERRORS_PANIC
))
181 panic("EXT3-fs (%s): panic forced after error\n",
185 void ext3_error(struct super_block
*sb
, const char *function
,
186 const char *fmt
, ...)
188 struct va_format vaf
;
196 printk(KERN_CRIT
"EXT3-fs error (device %s): %s: %pV\n",
197 sb
->s_id
, function
, &vaf
);
201 ext3_handle_error(sb
);
204 static const char *ext3_decode_error(struct super_block
* sb
, int errno
,
211 errstr
= "IO failure";
214 errstr
= "Out of memory";
217 if (!sb
|| EXT3_SB(sb
)->s_journal
->j_flags
& JFS_ABORT
)
218 errstr
= "Journal has aborted";
220 errstr
= "Readonly filesystem";
223 /* If the caller passed in an extra buffer for unknown
224 * errors, textualise them now. Else we just return
227 /* Check for truncated error codes... */
228 if (snprintf(nbuf
, 16, "error %d", -errno
) >= 0)
237 /* __ext3_std_error decodes expected errors from journaling functions
238 * automatically and invokes the appropriate error response. */
240 void __ext3_std_error (struct super_block
* sb
, const char * function
,
246 /* Special case: if the error is EROFS, and we're not already
247 * inside a transaction, then there's really no point in logging
249 if (errno
== -EROFS
&& journal_current_handle() == NULL
&&
250 (sb
->s_flags
& MS_RDONLY
))
253 errstr
= ext3_decode_error(sb
, errno
, nbuf
);
254 ext3_msg(sb
, KERN_CRIT
, "error in %s: %s", function
, errstr
);
256 ext3_handle_error(sb
);
260 * ext3_abort is a much stronger failure handler than ext3_error. The
261 * abort function may be used to deal with unrecoverable failures such
262 * as journal IO errors or ENOMEM at a critical moment in log management.
264 * We unconditionally force the filesystem into an ABORT|READONLY state,
265 * unless the error response on the fs has been set to panic in which
266 * case we take the easy way out and panic immediately.
269 void ext3_abort(struct super_block
*sb
, const char *function
,
270 const char *fmt
, ...)
272 struct va_format vaf
;
280 printk(KERN_CRIT
"EXT3-fs (%s): error: %s: %pV\n",
281 sb
->s_id
, function
, &vaf
);
285 if (test_opt(sb
, ERRORS_PANIC
))
286 panic("EXT3-fs: panic from previous error\n");
288 if (sb
->s_flags
& MS_RDONLY
)
291 ext3_msg(sb
, KERN_CRIT
,
292 "error: remounting filesystem read-only");
293 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
294 sb
->s_flags
|= MS_RDONLY
;
295 set_opt(EXT3_SB(sb
)->s_mount_opt
, ABORT
);
296 if (EXT3_SB(sb
)->s_journal
)
297 journal_abort(EXT3_SB(sb
)->s_journal
, -EIO
);
300 void ext3_warning(struct super_block
*sb
, const char *function
,
301 const char *fmt
, ...)
303 struct va_format vaf
;
311 printk(KERN_WARNING
"EXT3-fs (%s): warning: %s: %pV\n",
312 sb
->s_id
, function
, &vaf
);
317 void ext3_update_dynamic_rev(struct super_block
*sb
)
319 struct ext3_super_block
*es
= EXT3_SB(sb
)->s_es
;
321 if (le32_to_cpu(es
->s_rev_level
) > EXT3_GOOD_OLD_REV
)
324 ext3_msg(sb
, KERN_WARNING
,
325 "warning: updating to rev %d because of "
326 "new feature flag, running e2fsck is recommended",
329 es
->s_first_ino
= cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO
);
330 es
->s_inode_size
= cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE
);
331 es
->s_rev_level
= cpu_to_le32(EXT3_DYNAMIC_REV
);
332 /* leave es->s_feature_*compat flags alone */
333 /* es->s_uuid will be set by e2fsck if empty */
336 * The rest of the superblock fields should be zero, and if not it
337 * means they are likely already in use, so leave them alone. We
338 * can leave it up to e2fsck to clean up any inconsistencies there.
343 * Open the external journal device
345 static struct block_device
*ext3_blkdev_get(dev_t dev
, struct super_block
*sb
)
347 struct block_device
*bdev
;
348 char b
[BDEVNAME_SIZE
];
350 bdev
= blkdev_get_by_dev(dev
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
, sb
);
356 ext3_msg(sb
, KERN_ERR
, "error: failed to open journal device %s: %ld",
357 __bdevname(dev
, b
), PTR_ERR(bdev
));
363 * Release the journal device
365 static int ext3_blkdev_put(struct block_device
*bdev
)
367 return blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
|FMODE_EXCL
);
370 static int ext3_blkdev_remove(struct ext3_sb_info
*sbi
)
372 struct block_device
*bdev
;
375 bdev
= sbi
->journal_bdev
;
377 ret
= ext3_blkdev_put(bdev
);
378 sbi
->journal_bdev
= NULL
;
383 static inline struct inode
*orphan_list_entry(struct list_head
*l
)
385 return &list_entry(l
, struct ext3_inode_info
, i_orphan
)->vfs_inode
;
388 static void dump_orphan_list(struct super_block
*sb
, struct ext3_sb_info
*sbi
)
392 ext3_msg(sb
, KERN_ERR
, "error: sb orphan head is %d",
393 le32_to_cpu(sbi
->s_es
->s_last_orphan
));
395 ext3_msg(sb
, KERN_ERR
, "sb_info orphan list:");
396 list_for_each(l
, &sbi
->s_orphan
) {
397 struct inode
*inode
= orphan_list_entry(l
);
398 ext3_msg(sb
, KERN_ERR
, " "
399 "inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
400 inode
->i_sb
->s_id
, inode
->i_ino
, inode
,
401 inode
->i_mode
, inode
->i_nlink
,
406 static void ext3_put_super (struct super_block
* sb
)
408 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
409 struct ext3_super_block
*es
= sbi
->s_es
;
412 dquot_disable(sb
, -1, DQUOT_USAGE_ENABLED
| DQUOT_LIMITS_ENABLED
);
413 ext3_xattr_put_super(sb
);
414 err
= journal_destroy(sbi
->s_journal
);
415 sbi
->s_journal
= NULL
;
417 ext3_abort(sb
, __func__
, "Couldn't clean up the journal");
419 if (!(sb
->s_flags
& MS_RDONLY
)) {
420 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
421 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
422 BUFFER_TRACE(sbi
->s_sbh
, "marking dirty");
423 mark_buffer_dirty(sbi
->s_sbh
);
424 ext3_commit_super(sb
, es
, 1);
427 for (i
= 0; i
< sbi
->s_gdb_count
; i
++)
428 brelse(sbi
->s_group_desc
[i
]);
429 kfree(sbi
->s_group_desc
);
430 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
431 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
432 percpu_counter_destroy(&sbi
->s_dirs_counter
);
435 for (i
= 0; i
< MAXQUOTAS
; i
++)
436 kfree(sbi
->s_qf_names
[i
]);
439 /* Debugging code just in case the in-memory inode orphan list
440 * isn't empty. The on-disk one can be non-empty if we've
441 * detected an error and taken the fs readonly, but the
442 * in-memory list had better be clean by this point. */
443 if (!list_empty(&sbi
->s_orphan
))
444 dump_orphan_list(sb
, sbi
);
445 J_ASSERT(list_empty(&sbi
->s_orphan
));
447 invalidate_bdev(sb
->s_bdev
);
448 if (sbi
->journal_bdev
&& sbi
->journal_bdev
!= sb
->s_bdev
) {
450 * Invalidate the journal device's buffers. We don't want them
451 * floating about in memory - the physical journal device may
452 * hotswapped, and it breaks the `ro-after' testing code.
454 sync_blockdev(sbi
->journal_bdev
);
455 invalidate_bdev(sbi
->journal_bdev
);
456 ext3_blkdev_remove(sbi
);
458 sb
->s_fs_info
= NULL
;
459 kfree(sbi
->s_blockgroup_lock
);
463 static struct kmem_cache
*ext3_inode_cachep
;
466 * Called inside transaction, so use GFP_NOFS
468 static struct inode
*ext3_alloc_inode(struct super_block
*sb
)
470 struct ext3_inode_info
*ei
;
472 ei
= kmem_cache_alloc(ext3_inode_cachep
, GFP_NOFS
);
475 ei
->i_block_alloc_info
= NULL
;
476 ei
->vfs_inode
.i_version
= 1;
477 atomic_set(&ei
->i_datasync_tid
, 0);
478 atomic_set(&ei
->i_sync_tid
, 0);
479 return &ei
->vfs_inode
;
482 static int ext3_drop_inode(struct inode
*inode
)
484 int drop
= generic_drop_inode(inode
);
486 trace_ext3_drop_inode(inode
, drop
);
490 static void ext3_i_callback(struct rcu_head
*head
)
492 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
493 kmem_cache_free(ext3_inode_cachep
, EXT3_I(inode
));
496 static void ext3_destroy_inode(struct inode
*inode
)
498 if (!list_empty(&(EXT3_I(inode
)->i_orphan
))) {
499 printk("EXT3 Inode %p: orphan list check failed!\n",
501 print_hex_dump(KERN_INFO
, "", DUMP_PREFIX_ADDRESS
, 16, 4,
502 EXT3_I(inode
), sizeof(struct ext3_inode_info
),
506 call_rcu(&inode
->i_rcu
, ext3_i_callback
);
509 static void init_once(void *foo
)
511 struct ext3_inode_info
*ei
= (struct ext3_inode_info
*) foo
;
513 INIT_LIST_HEAD(&ei
->i_orphan
);
514 #ifdef CONFIG_EXT3_FS_XATTR
515 init_rwsem(&ei
->xattr_sem
);
517 mutex_init(&ei
->truncate_mutex
);
518 inode_init_once(&ei
->vfs_inode
);
521 static int init_inodecache(void)
523 ext3_inode_cachep
= kmem_cache_create("ext3_inode_cache",
524 sizeof(struct ext3_inode_info
),
525 0, (SLAB_RECLAIM_ACCOUNT
|
528 if (ext3_inode_cachep
== NULL
)
533 static void destroy_inodecache(void)
536 * Make sure all delayed rcu free inodes are flushed before we
540 kmem_cache_destroy(ext3_inode_cachep
);
543 static inline void ext3_show_quota_options(struct seq_file
*seq
, struct super_block
*sb
)
545 #if defined(CONFIG_QUOTA)
546 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
548 if (sbi
->s_jquota_fmt
) {
551 switch (sbi
->s_jquota_fmt
) {
562 seq_printf(seq
, ",jqfmt=%s", fmtname
);
565 if (sbi
->s_qf_names
[USRQUOTA
])
566 seq_printf(seq
, ",usrjquota=%s", sbi
->s_qf_names
[USRQUOTA
]);
568 if (sbi
->s_qf_names
[GRPQUOTA
])
569 seq_printf(seq
, ",grpjquota=%s", sbi
->s_qf_names
[GRPQUOTA
]);
571 if (test_opt(sb
, USRQUOTA
))
572 seq_puts(seq
, ",usrquota");
574 if (test_opt(sb
, GRPQUOTA
))
575 seq_puts(seq
, ",grpquota");
579 static char *data_mode_string(unsigned long mode
)
582 case EXT3_MOUNT_JOURNAL_DATA
:
584 case EXT3_MOUNT_ORDERED_DATA
:
586 case EXT3_MOUNT_WRITEBACK_DATA
:
594 * - it's set to a non-default value OR
595 * - if the per-sb default is different from the global default
597 static int ext3_show_options(struct seq_file
*seq
, struct dentry
*root
)
599 struct super_block
*sb
= root
->d_sb
;
600 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
601 struct ext3_super_block
*es
= sbi
->s_es
;
602 unsigned long def_mount_opts
;
604 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
606 if (sbi
->s_sb_block
!= 1)
607 seq_printf(seq
, ",sb=%lu", sbi
->s_sb_block
);
608 if (test_opt(sb
, MINIX_DF
))
609 seq_puts(seq
, ",minixdf");
610 if (test_opt(sb
, GRPID
))
611 seq_puts(seq
, ",grpid");
612 if (!test_opt(sb
, GRPID
) && (def_mount_opts
& EXT3_DEFM_BSDGROUPS
))
613 seq_puts(seq
, ",nogrpid");
614 if (!uid_eq(sbi
->s_resuid
, make_kuid(&init_user_ns
, EXT3_DEF_RESUID
)) ||
615 le16_to_cpu(es
->s_def_resuid
) != EXT3_DEF_RESUID
) {
616 seq_printf(seq
, ",resuid=%u",
617 from_kuid_munged(&init_user_ns
, sbi
->s_resuid
));
619 if (!gid_eq(sbi
->s_resgid
, make_kgid(&init_user_ns
, EXT3_DEF_RESGID
)) ||
620 le16_to_cpu(es
->s_def_resgid
) != EXT3_DEF_RESGID
) {
621 seq_printf(seq
, ",resgid=%u",
622 from_kgid_munged(&init_user_ns
, sbi
->s_resgid
));
624 if (test_opt(sb
, ERRORS_RO
)) {
625 int def_errors
= le16_to_cpu(es
->s_errors
);
627 if (def_errors
== EXT3_ERRORS_PANIC
||
628 def_errors
== EXT3_ERRORS_CONTINUE
) {
629 seq_puts(seq
, ",errors=remount-ro");
632 if (test_opt(sb
, ERRORS_CONT
))
633 seq_puts(seq
, ",errors=continue");
634 if (test_opt(sb
, ERRORS_PANIC
))
635 seq_puts(seq
, ",errors=panic");
636 if (test_opt(sb
, NO_UID32
))
637 seq_puts(seq
, ",nouid32");
638 if (test_opt(sb
, DEBUG
))
639 seq_puts(seq
, ",debug");
640 #ifdef CONFIG_EXT3_FS_XATTR
641 if (test_opt(sb
, XATTR_USER
))
642 seq_puts(seq
, ",user_xattr");
643 if (!test_opt(sb
, XATTR_USER
) &&
644 (def_mount_opts
& EXT3_DEFM_XATTR_USER
)) {
645 seq_puts(seq
, ",nouser_xattr");
648 #ifdef CONFIG_EXT3_FS_POSIX_ACL
649 if (test_opt(sb
, POSIX_ACL
))
650 seq_puts(seq
, ",acl");
651 if (!test_opt(sb
, POSIX_ACL
) && (def_mount_opts
& EXT3_DEFM_ACL
))
652 seq_puts(seq
, ",noacl");
654 if (!test_opt(sb
, RESERVATION
))
655 seq_puts(seq
, ",noreservation");
656 if (sbi
->s_commit_interval
) {
657 seq_printf(seq
, ",commit=%u",
658 (unsigned) (sbi
->s_commit_interval
/ HZ
));
662 * Always display barrier state so it's clear what the status is.
664 seq_puts(seq
, ",barrier=");
665 seq_puts(seq
, test_opt(sb
, BARRIER
) ? "1" : "0");
666 seq_printf(seq
, ",data=%s", data_mode_string(test_opt(sb
, DATA_FLAGS
)));
667 if (test_opt(sb
, DATA_ERR_ABORT
))
668 seq_puts(seq
, ",data_err=abort");
670 if (test_opt(sb
, NOLOAD
))
671 seq_puts(seq
, ",norecovery");
673 ext3_show_quota_options(seq
, sb
);
679 static struct inode
*ext3_nfs_get_inode(struct super_block
*sb
,
680 u64 ino
, u32 generation
)
684 if (ino
< EXT3_FIRST_INO(sb
) && ino
!= EXT3_ROOT_INO
)
685 return ERR_PTR(-ESTALE
);
686 if (ino
> le32_to_cpu(EXT3_SB(sb
)->s_es
->s_inodes_count
))
687 return ERR_PTR(-ESTALE
);
689 /* iget isn't really right if the inode is currently unallocated!!
691 * ext3_read_inode will return a bad_inode if the inode had been
692 * deleted, so we should be safe.
694 * Currently we don't know the generation for parent directory, so
695 * a generation of 0 means "accept any"
697 inode
= ext3_iget(sb
, ino
);
699 return ERR_CAST(inode
);
700 if (generation
&& inode
->i_generation
!= generation
) {
702 return ERR_PTR(-ESTALE
);
708 static struct dentry
*ext3_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
709 int fh_len
, int fh_type
)
711 return generic_fh_to_dentry(sb
, fid
, fh_len
, fh_type
,
715 static struct dentry
*ext3_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
716 int fh_len
, int fh_type
)
718 return generic_fh_to_parent(sb
, fid
, fh_len
, fh_type
,
723 * Try to release metadata pages (indirect blocks, directories) which are
724 * mapped via the block device. Since these pages could have journal heads
725 * which would prevent try_to_free_buffers() from freeing them, we must use
726 * jbd layer's try_to_free_buffers() function to release them.
728 static int bdev_try_to_free_page(struct super_block
*sb
, struct page
*page
,
731 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
733 WARN_ON(PageChecked(page
));
734 if (!page_has_buffers(page
))
737 return journal_try_to_free_buffers(journal
, page
,
739 return try_to_free_buffers(page
);
743 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
744 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
746 static int ext3_write_dquot(struct dquot
*dquot
);
747 static int ext3_acquire_dquot(struct dquot
*dquot
);
748 static int ext3_release_dquot(struct dquot
*dquot
);
749 static int ext3_mark_dquot_dirty(struct dquot
*dquot
);
750 static int ext3_write_info(struct super_block
*sb
, int type
);
751 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
753 static int ext3_quota_on_mount(struct super_block
*sb
, int type
);
754 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
755 size_t len
, loff_t off
);
756 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
757 const char *data
, size_t len
, loff_t off
);
759 static const struct dquot_operations ext3_quota_operations
= {
760 .write_dquot
= ext3_write_dquot
,
761 .acquire_dquot
= ext3_acquire_dquot
,
762 .release_dquot
= ext3_release_dquot
,
763 .mark_dirty
= ext3_mark_dquot_dirty
,
764 .write_info
= ext3_write_info
,
765 .alloc_dquot
= dquot_alloc
,
766 .destroy_dquot
= dquot_destroy
,
769 static const struct quotactl_ops ext3_qctl_operations
= {
770 .quota_on
= ext3_quota_on
,
771 .quota_off
= dquot_quota_off
,
772 .quota_sync
= dquot_quota_sync
,
773 .get_info
= dquot_get_dqinfo
,
774 .set_info
= dquot_set_dqinfo
,
775 .get_dqblk
= dquot_get_dqblk
,
776 .set_dqblk
= dquot_set_dqblk
780 static const struct super_operations ext3_sops
= {
781 .alloc_inode
= ext3_alloc_inode
,
782 .destroy_inode
= ext3_destroy_inode
,
783 .write_inode
= ext3_write_inode
,
784 .dirty_inode
= ext3_dirty_inode
,
785 .drop_inode
= ext3_drop_inode
,
786 .evict_inode
= ext3_evict_inode
,
787 .put_super
= ext3_put_super
,
788 .sync_fs
= ext3_sync_fs
,
789 .freeze_fs
= ext3_freeze
,
790 .unfreeze_fs
= ext3_unfreeze
,
791 .statfs
= ext3_statfs
,
792 .remount_fs
= ext3_remount
,
793 .show_options
= ext3_show_options
,
795 .quota_read
= ext3_quota_read
,
796 .quota_write
= ext3_quota_write
,
798 .bdev_try_to_free_page
= bdev_try_to_free_page
,
801 static const struct export_operations ext3_export_ops
= {
802 .fh_to_dentry
= ext3_fh_to_dentry
,
803 .fh_to_parent
= ext3_fh_to_parent
,
804 .get_parent
= ext3_get_parent
,
808 Opt_bsd_df
, Opt_minix_df
, Opt_grpid
, Opt_nogrpid
,
809 Opt_resgid
, Opt_resuid
, Opt_sb
, Opt_err_cont
, Opt_err_panic
, Opt_err_ro
,
810 Opt_nouid32
, Opt_nocheck
, Opt_debug
, Opt_oldalloc
, Opt_orlov
,
811 Opt_user_xattr
, Opt_nouser_xattr
, Opt_acl
, Opt_noacl
,
812 Opt_reservation
, Opt_noreservation
, Opt_noload
, Opt_nobh
, Opt_bh
,
813 Opt_commit
, Opt_journal_update
, Opt_journal_inum
, Opt_journal_dev
,
814 Opt_abort
, Opt_data_journal
, Opt_data_ordered
, Opt_data_writeback
,
815 Opt_data_err_abort
, Opt_data_err_ignore
,
816 Opt_usrjquota
, Opt_grpjquota
, Opt_offusrjquota
, Opt_offgrpjquota
,
817 Opt_jqfmt_vfsold
, Opt_jqfmt_vfsv0
, Opt_jqfmt_vfsv1
, Opt_quota
,
818 Opt_noquota
, Opt_ignore
, Opt_barrier
, Opt_nobarrier
, Opt_err
,
819 Opt_resize
, Opt_usrquota
, Opt_grpquota
822 static const match_table_t tokens
= {
823 {Opt_bsd_df
, "bsddf"},
824 {Opt_minix_df
, "minixdf"},
825 {Opt_grpid
, "grpid"},
826 {Opt_grpid
, "bsdgroups"},
827 {Opt_nogrpid
, "nogrpid"},
828 {Opt_nogrpid
, "sysvgroups"},
829 {Opt_resgid
, "resgid=%u"},
830 {Opt_resuid
, "resuid=%u"},
832 {Opt_err_cont
, "errors=continue"},
833 {Opt_err_panic
, "errors=panic"},
834 {Opt_err_ro
, "errors=remount-ro"},
835 {Opt_nouid32
, "nouid32"},
836 {Opt_nocheck
, "nocheck"},
837 {Opt_nocheck
, "check=none"},
838 {Opt_debug
, "debug"},
839 {Opt_oldalloc
, "oldalloc"},
840 {Opt_orlov
, "orlov"},
841 {Opt_user_xattr
, "user_xattr"},
842 {Opt_nouser_xattr
, "nouser_xattr"},
844 {Opt_noacl
, "noacl"},
845 {Opt_reservation
, "reservation"},
846 {Opt_noreservation
, "noreservation"},
847 {Opt_noload
, "noload"},
848 {Opt_noload
, "norecovery"},
851 {Opt_commit
, "commit=%u"},
852 {Opt_journal_update
, "journal=update"},
853 {Opt_journal_inum
, "journal=%u"},
854 {Opt_journal_dev
, "journal_dev=%u"},
855 {Opt_abort
, "abort"},
856 {Opt_data_journal
, "data=journal"},
857 {Opt_data_ordered
, "data=ordered"},
858 {Opt_data_writeback
, "data=writeback"},
859 {Opt_data_err_abort
, "data_err=abort"},
860 {Opt_data_err_ignore
, "data_err=ignore"},
861 {Opt_offusrjquota
, "usrjquota="},
862 {Opt_usrjquota
, "usrjquota=%s"},
863 {Opt_offgrpjquota
, "grpjquota="},
864 {Opt_grpjquota
, "grpjquota=%s"},
865 {Opt_jqfmt_vfsold
, "jqfmt=vfsold"},
866 {Opt_jqfmt_vfsv0
, "jqfmt=vfsv0"},
867 {Opt_jqfmt_vfsv1
, "jqfmt=vfsv1"},
868 {Opt_grpquota
, "grpquota"},
869 {Opt_noquota
, "noquota"},
870 {Opt_quota
, "quota"},
871 {Opt_usrquota
, "usrquota"},
872 {Opt_barrier
, "barrier=%u"},
873 {Opt_barrier
, "barrier"},
874 {Opt_nobarrier
, "nobarrier"},
875 {Opt_resize
, "resize"},
879 static ext3_fsblk_t
get_sb_block(void **data
, struct super_block
*sb
)
881 ext3_fsblk_t sb_block
;
882 char *options
= (char *) *data
;
884 if (!options
|| strncmp(options
, "sb=", 3) != 0)
885 return 1; /* Default location */
887 /*todo: use simple_strtoll with >32bit ext3 */
888 sb_block
= simple_strtoul(options
, &options
, 0);
889 if (*options
&& *options
!= ',') {
890 ext3_msg(sb
, KERN_ERR
, "error: invalid sb specification: %s",
896 *data
= (void *) options
;
901 static int set_qf_name(struct super_block
*sb
, int qtype
, substring_t
*args
)
903 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
906 if (sb_any_quota_loaded(sb
) &&
907 !sbi
->s_qf_names
[qtype
]) {
908 ext3_msg(sb
, KERN_ERR
,
909 "Cannot change journaled "
910 "quota options when quota turned on");
913 qname
= match_strdup(args
);
915 ext3_msg(sb
, KERN_ERR
,
916 "Not enough memory for storing quotafile name");
919 if (sbi
->s_qf_names
[qtype
]) {
920 int same
= !strcmp(sbi
->s_qf_names
[qtype
], qname
);
924 ext3_msg(sb
, KERN_ERR
,
925 "%s quota file already specified",
930 if (strchr(qname
, '/')) {
931 ext3_msg(sb
, KERN_ERR
,
932 "quotafile must be on filesystem root");
936 sbi
->s_qf_names
[qtype
] = qname
;
937 set_opt(sbi
->s_mount_opt
, QUOTA
);
941 static int clear_qf_name(struct super_block
*sb
, int qtype
) {
943 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
945 if (sb_any_quota_loaded(sb
) &&
946 sbi
->s_qf_names
[qtype
]) {
947 ext3_msg(sb
, KERN_ERR
, "Cannot change journaled quota options"
948 " when quota turned on");
951 if (sbi
->s_qf_names
[qtype
]) {
952 kfree(sbi
->s_qf_names
[qtype
]);
953 sbi
->s_qf_names
[qtype
] = NULL
;
959 static int parse_options (char *options
, struct super_block
*sb
,
960 unsigned int *inum
, unsigned long *journal_devnum
,
961 ext3_fsblk_t
*n_blocks_count
, int is_remount
)
963 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
965 substring_t args
[MAX_OPT_ARGS
];
977 while ((p
= strsep (&options
, ",")) != NULL
) {
982 * Initialize args struct so we know whether arg was
983 * found; some options take optional arguments.
985 args
[0].to
= args
[0].from
= NULL
;
986 token
= match_token(p
, tokens
, args
);
989 clear_opt (sbi
->s_mount_opt
, MINIX_DF
);
992 set_opt (sbi
->s_mount_opt
, MINIX_DF
);
995 set_opt (sbi
->s_mount_opt
, GRPID
);
998 clear_opt (sbi
->s_mount_opt
, GRPID
);
1001 if (match_int(&args
[0], &option
))
1003 uid
= make_kuid(current_user_ns(), option
);
1004 if (!uid_valid(uid
)) {
1005 ext3_msg(sb
, KERN_ERR
, "Invalid uid value %d", option
);
1009 sbi
->s_resuid
= uid
;
1012 if (match_int(&args
[0], &option
))
1014 gid
= make_kgid(current_user_ns(), option
);
1015 if (!gid_valid(gid
)) {
1016 ext3_msg(sb
, KERN_ERR
, "Invalid gid value %d", option
);
1019 sbi
->s_resgid
= gid
;
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 "
1307 if (sbi
->s_jquota_fmt
) {
1308 ext3_msg(sb
, KERN_ERR
, "error: journaled quota format "
1309 "specified with no journaling "
1318 static int ext3_setup_super(struct super_block
*sb
, struct ext3_super_block
*es
,
1321 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1324 if (le32_to_cpu(es
->s_rev_level
) > EXT3_MAX_SUPP_REV
) {
1325 ext3_msg(sb
, KERN_ERR
,
1326 "error: revision level too high, "
1327 "forcing read-only mode");
1332 if (!(sbi
->s_mount_state
& EXT3_VALID_FS
))
1333 ext3_msg(sb
, KERN_WARNING
,
1334 "warning: mounting unchecked fs, "
1335 "running e2fsck is recommended");
1336 else if ((sbi
->s_mount_state
& EXT3_ERROR_FS
))
1337 ext3_msg(sb
, KERN_WARNING
,
1338 "warning: mounting fs with errors, "
1339 "running e2fsck is recommended");
1340 else if ((__s16
) le16_to_cpu(es
->s_max_mnt_count
) > 0 &&
1341 le16_to_cpu(es
->s_mnt_count
) >=
1342 le16_to_cpu(es
->s_max_mnt_count
))
1343 ext3_msg(sb
, KERN_WARNING
,
1344 "warning: maximal mount count reached, "
1345 "running e2fsck is recommended");
1346 else if (le32_to_cpu(es
->s_checkinterval
) &&
1347 (le32_to_cpu(es
->s_lastcheck
) +
1348 le32_to_cpu(es
->s_checkinterval
) <= get_seconds()))
1349 ext3_msg(sb
, KERN_WARNING
,
1350 "warning: checktime reached, "
1351 "running e2fsck is recommended");
1353 /* @@@ We _will_ want to clear the valid bit if we find
1354 inconsistencies, to force a fsck at reboot. But for
1355 a plain journaled filesystem we can keep it set as
1356 valid forever! :) */
1357 es
->s_state
&= cpu_to_le16(~EXT3_VALID_FS
);
1359 if (!le16_to_cpu(es
->s_max_mnt_count
))
1360 es
->s_max_mnt_count
= cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT
);
1361 le16_add_cpu(&es
->s_mnt_count
, 1);
1362 es
->s_mtime
= cpu_to_le32(get_seconds());
1363 ext3_update_dynamic_rev(sb
);
1364 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
1366 ext3_commit_super(sb
, es
, 1);
1367 if (test_opt(sb
, DEBUG
))
1368 ext3_msg(sb
, KERN_INFO
, "[bs=%lu, gc=%lu, "
1369 "bpg=%lu, ipg=%lu, mo=%04lx]",
1371 sbi
->s_groups_count
,
1372 EXT3_BLOCKS_PER_GROUP(sb
),
1373 EXT3_INODES_PER_GROUP(sb
),
1376 if (EXT3_SB(sb
)->s_journal
->j_inode
== NULL
) {
1377 char b
[BDEVNAME_SIZE
];
1378 ext3_msg(sb
, KERN_INFO
, "using external journal on %s",
1379 bdevname(EXT3_SB(sb
)->s_journal
->j_dev
, b
));
1381 ext3_msg(sb
, KERN_INFO
, "using internal journal");
1383 cleancache_init_fs(sb
);
1387 /* Called at mount-time, super-block is locked */
1388 static int ext3_check_descriptors(struct super_block
*sb
)
1390 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1393 ext3_debug ("Checking group descriptors");
1395 for (i
= 0; i
< sbi
->s_groups_count
; i
++) {
1396 struct ext3_group_desc
*gdp
= ext3_get_group_desc(sb
, i
, NULL
);
1397 ext3_fsblk_t first_block
= ext3_group_first_block_no(sb
, i
);
1398 ext3_fsblk_t last_block
;
1400 if (i
== sbi
->s_groups_count
- 1)
1401 last_block
= le32_to_cpu(sbi
->s_es
->s_blocks_count
) - 1;
1403 last_block
= first_block
+
1404 (EXT3_BLOCKS_PER_GROUP(sb
) - 1);
1406 if (le32_to_cpu(gdp
->bg_block_bitmap
) < first_block
||
1407 le32_to_cpu(gdp
->bg_block_bitmap
) > last_block
)
1409 ext3_error (sb
, "ext3_check_descriptors",
1410 "Block bitmap for group %d"
1411 " not in group (block %lu)!",
1413 le32_to_cpu(gdp
->bg_block_bitmap
));
1416 if (le32_to_cpu(gdp
->bg_inode_bitmap
) < first_block
||
1417 le32_to_cpu(gdp
->bg_inode_bitmap
) > last_block
)
1419 ext3_error (sb
, "ext3_check_descriptors",
1420 "Inode bitmap for group %d"
1421 " not in group (block %lu)!",
1423 le32_to_cpu(gdp
->bg_inode_bitmap
));
1426 if (le32_to_cpu(gdp
->bg_inode_table
) < first_block
||
1427 le32_to_cpu(gdp
->bg_inode_table
) + sbi
->s_itb_per_group
- 1 >
1430 ext3_error (sb
, "ext3_check_descriptors",
1431 "Inode table for group %d"
1432 " not in group (block %lu)!",
1434 le32_to_cpu(gdp
->bg_inode_table
));
1439 sbi
->s_es
->s_free_blocks_count
=cpu_to_le32(ext3_count_free_blocks(sb
));
1440 sbi
->s_es
->s_free_inodes_count
=cpu_to_le32(ext3_count_free_inodes(sb
));
1445 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1446 * the superblock) which were deleted from all directories, but held open by
1447 * a process at the time of a crash. We walk the list and try to delete these
1448 * inodes at recovery time (only with a read-write filesystem).
1450 * In order to keep the orphan inode chain consistent during traversal (in
1451 * case of crash during recovery), we link each inode into the superblock
1452 * orphan list_head and handle it the same way as an inode deletion during
1453 * normal operation (which journals the operations for us).
1455 * We only do an iget() and an iput() on each inode, which is very safe if we
1456 * accidentally point at an in-use or already deleted inode. The worst that
1457 * can happen in this case is that we get a "bit already cleared" message from
1458 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1459 * e2fsck was run on this filesystem, and it must have already done the orphan
1460 * inode cleanup for us, so we can safely abort without any further action.
1462 static void ext3_orphan_cleanup (struct super_block
* sb
,
1463 struct ext3_super_block
* es
)
1465 unsigned int s_flags
= sb
->s_flags
;
1466 int nr_orphans
= 0, nr_truncates
= 0;
1470 if (!es
->s_last_orphan
) {
1471 jbd_debug(4, "no orphan inodes to clean up\n");
1475 if (bdev_read_only(sb
->s_bdev
)) {
1476 ext3_msg(sb
, KERN_ERR
, "error: write access "
1477 "unavailable, skipping orphan cleanup.");
1481 /* Check if feature set allows readwrite operations */
1482 if (EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~EXT3_FEATURE_RO_COMPAT_SUPP
)) {
1483 ext3_msg(sb
, KERN_INFO
, "Skipping orphan cleanup due to "
1484 "unknown ROCOMPAT features");
1488 if (EXT3_SB(sb
)->s_mount_state
& EXT3_ERROR_FS
) {
1489 /* don't clear list on RO mount w/ errors */
1490 if (es
->s_last_orphan
&& !(s_flags
& MS_RDONLY
)) {
1491 jbd_debug(1, "Errors on filesystem, "
1492 "clearing orphan list.\n");
1493 es
->s_last_orphan
= 0;
1495 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1499 if (s_flags
& MS_RDONLY
) {
1500 ext3_msg(sb
, KERN_INFO
, "orphan cleanup on readonly fs");
1501 sb
->s_flags
&= ~MS_RDONLY
;
1504 /* Needed for iput() to work correctly and not trash data */
1505 sb
->s_flags
|= MS_ACTIVE
;
1506 /* Turn on quotas so that they are updated correctly */
1507 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1508 if (EXT3_SB(sb
)->s_qf_names
[i
]) {
1509 int ret
= ext3_quota_on_mount(sb
, i
);
1511 ext3_msg(sb
, KERN_ERR
,
1512 "error: cannot turn on journaled "
1518 while (es
->s_last_orphan
) {
1519 struct inode
*inode
;
1521 inode
= ext3_orphan_get(sb
, le32_to_cpu(es
->s_last_orphan
));
1522 if (IS_ERR(inode
)) {
1523 es
->s_last_orphan
= 0;
1527 list_add(&EXT3_I(inode
)->i_orphan
, &EXT3_SB(sb
)->s_orphan
);
1528 dquot_initialize(inode
);
1529 if (inode
->i_nlink
) {
1531 "%s: truncating inode %lu to %Ld bytes\n",
1532 __func__
, inode
->i_ino
, inode
->i_size
);
1533 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1534 inode
->i_ino
, inode
->i_size
);
1535 ext3_truncate(inode
);
1539 "%s: deleting unreferenced inode %lu\n",
1540 __func__
, inode
->i_ino
);
1541 jbd_debug(2, "deleting unreferenced inode %lu\n",
1545 iput(inode
); /* The delete magic happens here! */
1548 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1551 ext3_msg(sb
, KERN_INFO
, "%d orphan inode%s deleted",
1552 PLURAL(nr_orphans
));
1554 ext3_msg(sb
, KERN_INFO
, "%d truncate%s cleaned up",
1555 PLURAL(nr_truncates
));
1557 /* Turn quotas off */
1558 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1559 if (sb_dqopt(sb
)->files
[i
])
1560 dquot_quota_off(sb
, i
);
1563 sb
->s_flags
= s_flags
; /* Restore MS_RDONLY status */
1567 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1568 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1569 * We need to be 1 filesystem block less than the 2^32 sector limit.
1571 static loff_t
ext3_max_size(int bits
)
1573 loff_t res
= EXT3_NDIR_BLOCKS
;
1577 /* This is calculated to be the largest file size for a
1578 * dense, file such that the total number of
1579 * sectors in the file, including data and all indirect blocks,
1580 * does not exceed 2^32 -1
1581 * __u32 i_blocks representing the total number of
1582 * 512 bytes blocks of the file
1584 upper_limit
= (1LL << 32) - 1;
1586 /* total blocks in file system block size */
1587 upper_limit
>>= (bits
- 9);
1590 /* indirect blocks */
1592 /* double indirect blocks */
1593 meta_blocks
+= 1 + (1LL << (bits
-2));
1594 /* tripple indirect blocks */
1595 meta_blocks
+= 1 + (1LL << (bits
-2)) + (1LL << (2*(bits
-2)));
1597 upper_limit
-= meta_blocks
;
1598 upper_limit
<<= bits
;
1600 res
+= 1LL << (bits
-2);
1601 res
+= 1LL << (2*(bits
-2));
1602 res
+= 1LL << (3*(bits
-2));
1604 if (res
> upper_limit
)
1607 if (res
> MAX_LFS_FILESIZE
)
1608 res
= MAX_LFS_FILESIZE
;
1613 static ext3_fsblk_t
descriptor_loc(struct super_block
*sb
,
1614 ext3_fsblk_t logic_sb_block
,
1617 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1618 unsigned long bg
, first_meta_bg
;
1621 first_meta_bg
= le32_to_cpu(sbi
->s_es
->s_first_meta_bg
);
1623 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_META_BG
) ||
1625 return (logic_sb_block
+ nr
+ 1);
1626 bg
= sbi
->s_desc_per_block
* nr
;
1627 if (ext3_bg_has_super(sb
, bg
))
1629 return (has_super
+ ext3_group_first_block_no(sb
, bg
));
1633 static int ext3_fill_super (struct super_block
*sb
, void *data
, int silent
)
1635 struct buffer_head
* bh
;
1636 struct ext3_super_block
*es
= NULL
;
1637 struct ext3_sb_info
*sbi
;
1639 ext3_fsblk_t sb_block
= get_sb_block(&data
, sb
);
1640 ext3_fsblk_t logic_sb_block
;
1641 unsigned long offset
= 0;
1642 unsigned int journal_inum
= 0;
1643 unsigned long journal_devnum
= 0;
1644 unsigned long def_mount_opts
;
1655 sbi
= kzalloc(sizeof(*sbi
), GFP_KERNEL
);
1659 sbi
->s_blockgroup_lock
=
1660 kzalloc(sizeof(struct blockgroup_lock
), GFP_KERNEL
);
1661 if (!sbi
->s_blockgroup_lock
) {
1665 sb
->s_fs_info
= sbi
;
1666 sbi
->s_sb_block
= sb_block
;
1668 blocksize
= sb_min_blocksize(sb
, EXT3_MIN_BLOCK_SIZE
);
1670 ext3_msg(sb
, KERN_ERR
, "error: unable to set blocksize");
1675 * The ext3 superblock will not be buffer aligned for other than 1kB
1676 * block sizes. We need to calculate the offset from buffer start.
1678 if (blocksize
!= EXT3_MIN_BLOCK_SIZE
) {
1679 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1680 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1682 logic_sb_block
= sb_block
;
1685 if (!(bh
= sb_bread(sb
, logic_sb_block
))) {
1686 ext3_msg(sb
, KERN_ERR
, "error: unable to read superblock");
1690 * Note: s_es must be initialized as soon as possible because
1691 * some ext3 macro-instructions depend on its value
1693 es
= (struct ext3_super_block
*) (bh
->b_data
+ offset
);
1695 sb
->s_magic
= le16_to_cpu(es
->s_magic
);
1696 if (sb
->s_magic
!= EXT3_SUPER_MAGIC
)
1699 /* Set defaults before we parse the mount options */
1700 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
1701 if (def_mount_opts
& EXT3_DEFM_DEBUG
)
1702 set_opt(sbi
->s_mount_opt
, DEBUG
);
1703 if (def_mount_opts
& EXT3_DEFM_BSDGROUPS
)
1704 set_opt(sbi
->s_mount_opt
, GRPID
);
1705 if (def_mount_opts
& EXT3_DEFM_UID16
)
1706 set_opt(sbi
->s_mount_opt
, NO_UID32
);
1707 #ifdef CONFIG_EXT3_FS_XATTR
1708 if (def_mount_opts
& EXT3_DEFM_XATTR_USER
)
1709 set_opt(sbi
->s_mount_opt
, XATTR_USER
);
1711 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1712 if (def_mount_opts
& EXT3_DEFM_ACL
)
1713 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
1715 if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_DATA
)
1716 set_opt(sbi
->s_mount_opt
, JOURNAL_DATA
);
1717 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_ORDERED
)
1718 set_opt(sbi
->s_mount_opt
, ORDERED_DATA
);
1719 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_WBACK
)
1720 set_opt(sbi
->s_mount_opt
, WRITEBACK_DATA
);
1722 if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_PANIC
)
1723 set_opt(sbi
->s_mount_opt
, ERRORS_PANIC
);
1724 else if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_CONTINUE
)
1725 set_opt(sbi
->s_mount_opt
, ERRORS_CONT
);
1727 set_opt(sbi
->s_mount_opt
, ERRORS_RO
);
1729 sbi
->s_resuid
= make_kuid(&init_user_ns
, le16_to_cpu(es
->s_def_resuid
));
1730 sbi
->s_resgid
= make_kgid(&init_user_ns
, le16_to_cpu(es
->s_def_resgid
));
1732 /* enable barriers by default */
1733 set_opt(sbi
->s_mount_opt
, BARRIER
);
1734 set_opt(sbi
->s_mount_opt
, RESERVATION
);
1736 if (!parse_options ((char *) data
, sb
, &journal_inum
, &journal_devnum
,
1740 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
1741 (test_opt(sb
, POSIX_ACL
) ? MS_POSIXACL
: 0);
1743 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
&&
1744 (EXT3_HAS_COMPAT_FEATURE(sb
, ~0U) ||
1745 EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~0U) ||
1746 EXT3_HAS_INCOMPAT_FEATURE(sb
, ~0U)))
1747 ext3_msg(sb
, KERN_WARNING
,
1748 "warning: feature flags set on rev 0 fs, "
1749 "running e2fsck is recommended");
1751 * Check feature flags regardless of the revision level, since we
1752 * previously didn't change the revision level when setting the flags,
1753 * so there is a chance incompat flags are set on a rev 0 filesystem.
1755 features
= EXT3_HAS_INCOMPAT_FEATURE(sb
, ~EXT3_FEATURE_INCOMPAT_SUPP
);
1757 ext3_msg(sb
, KERN_ERR
,
1758 "error: couldn't mount because of unsupported "
1759 "optional features (%x)", le32_to_cpu(features
));
1762 features
= EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~EXT3_FEATURE_RO_COMPAT_SUPP
);
1763 if (!(sb
->s_flags
& MS_RDONLY
) && features
) {
1764 ext3_msg(sb
, KERN_ERR
,
1765 "error: couldn't mount RDWR because of unsupported "
1766 "optional features (%x)", le32_to_cpu(features
));
1769 blocksize
= BLOCK_SIZE
<< le32_to_cpu(es
->s_log_block_size
);
1771 if (blocksize
< EXT3_MIN_BLOCK_SIZE
||
1772 blocksize
> EXT3_MAX_BLOCK_SIZE
) {
1773 ext3_msg(sb
, KERN_ERR
,
1774 "error: couldn't mount because of unsupported "
1775 "filesystem blocksize %d", blocksize
);
1779 hblock
= bdev_logical_block_size(sb
->s_bdev
);
1780 if (sb
->s_blocksize
!= blocksize
) {
1782 * Make sure the blocksize for the filesystem is larger
1783 * than the hardware sectorsize for the machine.
1785 if (blocksize
< hblock
) {
1786 ext3_msg(sb
, KERN_ERR
,
1787 "error: fsblocksize %d too small for "
1788 "hardware sectorsize %d", blocksize
, hblock
);
1793 if (!sb_set_blocksize(sb
, blocksize
)) {
1794 ext3_msg(sb
, KERN_ERR
,
1795 "error: bad blocksize %d", blocksize
);
1798 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1799 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1800 bh
= sb_bread(sb
, logic_sb_block
);
1802 ext3_msg(sb
, KERN_ERR
,
1803 "error: can't read superblock on 2nd try");
1806 es
= (struct ext3_super_block
*)(bh
->b_data
+ offset
);
1808 if (es
->s_magic
!= cpu_to_le16(EXT3_SUPER_MAGIC
)) {
1809 ext3_msg(sb
, KERN_ERR
,
1810 "error: magic mismatch");
1815 sb
->s_maxbytes
= ext3_max_size(sb
->s_blocksize_bits
);
1817 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
) {
1818 sbi
->s_inode_size
= EXT3_GOOD_OLD_INODE_SIZE
;
1819 sbi
->s_first_ino
= EXT3_GOOD_OLD_FIRST_INO
;
1821 sbi
->s_inode_size
= le16_to_cpu(es
->s_inode_size
);
1822 sbi
->s_first_ino
= le32_to_cpu(es
->s_first_ino
);
1823 if ((sbi
->s_inode_size
< EXT3_GOOD_OLD_INODE_SIZE
) ||
1824 (!is_power_of_2(sbi
->s_inode_size
)) ||
1825 (sbi
->s_inode_size
> blocksize
)) {
1826 ext3_msg(sb
, KERN_ERR
,
1827 "error: unsupported inode size: %d",
1832 sbi
->s_frag_size
= EXT3_MIN_FRAG_SIZE
<<
1833 le32_to_cpu(es
->s_log_frag_size
);
1834 if (blocksize
!= sbi
->s_frag_size
) {
1835 ext3_msg(sb
, KERN_ERR
,
1836 "error: fragsize %lu != blocksize %u (unsupported)",
1837 sbi
->s_frag_size
, blocksize
);
1840 sbi
->s_frags_per_block
= 1;
1841 sbi
->s_blocks_per_group
= le32_to_cpu(es
->s_blocks_per_group
);
1842 sbi
->s_frags_per_group
= le32_to_cpu(es
->s_frags_per_group
);
1843 sbi
->s_inodes_per_group
= le32_to_cpu(es
->s_inodes_per_group
);
1844 if (EXT3_INODE_SIZE(sb
) == 0 || EXT3_INODES_PER_GROUP(sb
) == 0)
1846 sbi
->s_inodes_per_block
= blocksize
/ EXT3_INODE_SIZE(sb
);
1847 if (sbi
->s_inodes_per_block
== 0)
1849 sbi
->s_itb_per_group
= sbi
->s_inodes_per_group
/
1850 sbi
->s_inodes_per_block
;
1851 sbi
->s_desc_per_block
= blocksize
/ sizeof(struct ext3_group_desc
);
1853 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
1854 sbi
->s_addr_per_block_bits
= ilog2(EXT3_ADDR_PER_BLOCK(sb
));
1855 sbi
->s_desc_per_block_bits
= ilog2(EXT3_DESC_PER_BLOCK(sb
));
1856 for (i
=0; i
< 4; i
++)
1857 sbi
->s_hash_seed
[i
] = le32_to_cpu(es
->s_hash_seed
[i
]);
1858 sbi
->s_def_hash_version
= es
->s_def_hash_version
;
1859 i
= le32_to_cpu(es
->s_flags
);
1860 if (i
& EXT2_FLAGS_UNSIGNED_HASH
)
1861 sbi
->s_hash_unsigned
= 3;
1862 else if ((i
& EXT2_FLAGS_SIGNED_HASH
) == 0) {
1863 #ifdef __CHAR_UNSIGNED__
1864 es
->s_flags
|= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH
);
1865 sbi
->s_hash_unsigned
= 3;
1867 es
->s_flags
|= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH
);
1871 if (sbi
->s_blocks_per_group
> blocksize
* 8) {
1872 ext3_msg(sb
, KERN_ERR
,
1873 "#blocks per group too big: %lu",
1874 sbi
->s_blocks_per_group
);
1877 if (sbi
->s_frags_per_group
> blocksize
* 8) {
1878 ext3_msg(sb
, KERN_ERR
,
1879 "error: #fragments per group too big: %lu",
1880 sbi
->s_frags_per_group
);
1883 if (sbi
->s_inodes_per_group
> blocksize
* 8) {
1884 ext3_msg(sb
, KERN_ERR
,
1885 "error: #inodes per group too big: %lu",
1886 sbi
->s_inodes_per_group
);
1890 err
= generic_check_addressable(sb
->s_blocksize_bits
,
1891 le32_to_cpu(es
->s_blocks_count
));
1893 ext3_msg(sb
, KERN_ERR
,
1894 "error: filesystem is too large to mount safely");
1895 if (sizeof(sector_t
) < 8)
1896 ext3_msg(sb
, KERN_ERR
,
1897 "error: CONFIG_LBDAF not enabled");
1902 if (EXT3_BLOCKS_PER_GROUP(sb
) == 0)
1904 sbi
->s_groups_count
= ((le32_to_cpu(es
->s_blocks_count
) -
1905 le32_to_cpu(es
->s_first_data_block
) - 1)
1906 / EXT3_BLOCKS_PER_GROUP(sb
)) + 1;
1907 db_count
= DIV_ROUND_UP(sbi
->s_groups_count
, EXT3_DESC_PER_BLOCK(sb
));
1908 sbi
->s_group_desc
= kmalloc(db_count
* sizeof (struct buffer_head
*),
1910 if (sbi
->s_group_desc
== NULL
) {
1911 ext3_msg(sb
, KERN_ERR
,
1912 "error: not enough memory");
1917 bgl_lock_init(sbi
->s_blockgroup_lock
);
1919 for (i
= 0; i
< db_count
; i
++) {
1920 block
= descriptor_loc(sb
, logic_sb_block
, i
);
1921 sbi
->s_group_desc
[i
] = sb_bread(sb
, block
);
1922 if (!sbi
->s_group_desc
[i
]) {
1923 ext3_msg(sb
, KERN_ERR
,
1924 "error: can't read group descriptor %d", i
);
1929 if (!ext3_check_descriptors (sb
)) {
1930 ext3_msg(sb
, KERN_ERR
,
1931 "error: group descriptors corrupted");
1934 sbi
->s_gdb_count
= db_count
;
1935 get_random_bytes(&sbi
->s_next_generation
, sizeof(u32
));
1936 spin_lock_init(&sbi
->s_next_gen_lock
);
1938 /* per fileystem reservation list head & lock */
1939 spin_lock_init(&sbi
->s_rsv_window_lock
);
1940 sbi
->s_rsv_window_root
= RB_ROOT
;
1941 /* Add a single, static dummy reservation to the start of the
1942 * reservation window list --- it gives us a placeholder for
1943 * append-at-start-of-list which makes the allocation logic
1944 * _much_ simpler. */
1945 sbi
->s_rsv_window_head
.rsv_start
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1946 sbi
->s_rsv_window_head
.rsv_end
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1947 sbi
->s_rsv_window_head
.rsv_alloc_hit
= 0;
1948 sbi
->s_rsv_window_head
.rsv_goal_size
= 0;
1949 ext3_rsv_window_add(sb
, &sbi
->s_rsv_window_head
);
1952 * set up enough so that it can read an inode
1954 sb
->s_op
= &ext3_sops
;
1955 sb
->s_export_op
= &ext3_export_ops
;
1956 sb
->s_xattr
= ext3_xattr_handlers
;
1958 sb
->s_qcop
= &ext3_qctl_operations
;
1959 sb
->dq_op
= &ext3_quota_operations
;
1961 memcpy(sb
->s_uuid
, es
->s_uuid
, sizeof(es
->s_uuid
));
1962 INIT_LIST_HEAD(&sbi
->s_orphan
); /* unlinked but open files */
1963 mutex_init(&sbi
->s_orphan_lock
);
1964 mutex_init(&sbi
->s_resize_lock
);
1968 needs_recovery
= (es
->s_last_orphan
!= 0 ||
1969 EXT3_HAS_INCOMPAT_FEATURE(sb
,
1970 EXT3_FEATURE_INCOMPAT_RECOVER
));
1973 * The first inode we look at is the journal inode. Don't try
1974 * root first: it may be modified in the journal!
1976 if (!test_opt(sb
, NOLOAD
) &&
1977 EXT3_HAS_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
)) {
1978 if (ext3_load_journal(sb
, es
, journal_devnum
))
1980 } else if (journal_inum
) {
1981 if (ext3_create_journal(sb
, es
, journal_inum
))
1985 ext3_msg(sb
, KERN_ERR
,
1986 "error: no journal found. "
1987 "mounting ext3 over ext2?");
1990 err
= percpu_counter_init(&sbi
->s_freeblocks_counter
,
1991 ext3_count_free_blocks(sb
));
1993 err
= percpu_counter_init(&sbi
->s_freeinodes_counter
,
1994 ext3_count_free_inodes(sb
));
1997 err
= percpu_counter_init(&sbi
->s_dirs_counter
,
1998 ext3_count_dirs(sb
));
2001 ext3_msg(sb
, KERN_ERR
, "error: insufficient memory");
2006 /* We have now updated the journal if required, so we can
2007 * validate the data journaling mode. */
2008 switch (test_opt(sb
, DATA_FLAGS
)) {
2010 /* No mode set, assume a default based on the journal
2011 capabilities: ORDERED_DATA if the journal can
2012 cope, else JOURNAL_DATA */
2013 if (journal_check_available_features
2014 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
))
2015 set_opt(sbi
->s_mount_opt
, DEFAULT_DATA_MODE
);
2017 set_opt(sbi
->s_mount_opt
, JOURNAL_DATA
);
2020 case EXT3_MOUNT_ORDERED_DATA
:
2021 case EXT3_MOUNT_WRITEBACK_DATA
:
2022 if (!journal_check_available_features
2023 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
)) {
2024 ext3_msg(sb
, KERN_ERR
,
2025 "error: journal does not support "
2026 "requested data journaling mode");
2034 * The journal_load will have done any necessary log recovery,
2035 * so we can safely mount the rest of the filesystem now.
2038 root
= ext3_iget(sb
, EXT3_ROOT_INO
);
2040 ext3_msg(sb
, KERN_ERR
, "error: get root inode failed");
2041 ret
= PTR_ERR(root
);
2044 if (!S_ISDIR(root
->i_mode
) || !root
->i_blocks
|| !root
->i_size
) {
2046 ext3_msg(sb
, KERN_ERR
, "error: corrupt root inode, run e2fsck");
2049 sb
->s_root
= d_make_root(root
);
2051 ext3_msg(sb
, KERN_ERR
, "error: get root dentry failed");
2056 if (ext3_setup_super(sb
, es
, sb
->s_flags
& MS_RDONLY
))
2057 sb
->s_flags
|= MS_RDONLY
;
2059 EXT3_SB(sb
)->s_mount_state
|= EXT3_ORPHAN_FS
;
2060 ext3_orphan_cleanup(sb
, es
);
2061 EXT3_SB(sb
)->s_mount_state
&= ~EXT3_ORPHAN_FS
;
2062 if (needs_recovery
) {
2063 ext3_mark_recovery_complete(sb
, es
);
2064 ext3_msg(sb
, KERN_INFO
, "recovery complete");
2066 ext3_msg(sb
, KERN_INFO
, "mounted filesystem with %s data mode",
2067 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_JOURNAL_DATA
? "journal":
2068 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_ORDERED_DATA
? "ordered":
2070 sb
->s_flags
|= MS_SNAP_STABLE
;
2076 ext3_msg(sb
, KERN_INFO
,
2077 "error: can't find ext3 filesystem on dev %s.",
2082 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
2083 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
2084 percpu_counter_destroy(&sbi
->s_dirs_counter
);
2085 journal_destroy(sbi
->s_journal
);
2087 for (i
= 0; i
< db_count
; i
++)
2088 brelse(sbi
->s_group_desc
[i
]);
2089 kfree(sbi
->s_group_desc
);
2092 for (i
= 0; i
< MAXQUOTAS
; i
++)
2093 kfree(sbi
->s_qf_names
[i
]);
2095 ext3_blkdev_remove(sbi
);
2098 sb
->s_fs_info
= NULL
;
2099 kfree(sbi
->s_blockgroup_lock
);
2105 * Setup any per-fs journal parameters now. We'll do this both on
2106 * initial mount, once the journal has been initialised but before we've
2107 * done any recovery; and again on any subsequent remount.
2109 static void ext3_init_journal_params(struct super_block
*sb
, journal_t
*journal
)
2111 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2113 if (sbi
->s_commit_interval
)
2114 journal
->j_commit_interval
= sbi
->s_commit_interval
;
2115 /* We could also set up an ext3-specific default for the commit
2116 * interval here, but for now we'll just fall back to the jbd
2119 spin_lock(&journal
->j_state_lock
);
2120 if (test_opt(sb
, BARRIER
))
2121 journal
->j_flags
|= JFS_BARRIER
;
2123 journal
->j_flags
&= ~JFS_BARRIER
;
2124 if (test_opt(sb
, DATA_ERR_ABORT
))
2125 journal
->j_flags
|= JFS_ABORT_ON_SYNCDATA_ERR
;
2127 journal
->j_flags
&= ~JFS_ABORT_ON_SYNCDATA_ERR
;
2128 spin_unlock(&journal
->j_state_lock
);
2131 static journal_t
*ext3_get_journal(struct super_block
*sb
,
2132 unsigned int journal_inum
)
2134 struct inode
*journal_inode
;
2137 /* First, test for the existence of a valid inode on disk. Bad
2138 * things happen if we iget() an unused inode, as the subsequent
2139 * iput() will try to delete it. */
2141 journal_inode
= ext3_iget(sb
, journal_inum
);
2142 if (IS_ERR(journal_inode
)) {
2143 ext3_msg(sb
, KERN_ERR
, "error: no journal found");
2146 if (!journal_inode
->i_nlink
) {
2147 make_bad_inode(journal_inode
);
2148 iput(journal_inode
);
2149 ext3_msg(sb
, KERN_ERR
, "error: journal inode is deleted");
2153 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2154 journal_inode
, journal_inode
->i_size
);
2155 if (!S_ISREG(journal_inode
->i_mode
)) {
2156 ext3_msg(sb
, KERN_ERR
, "error: invalid journal inode");
2157 iput(journal_inode
);
2161 journal
= journal_init_inode(journal_inode
);
2163 ext3_msg(sb
, KERN_ERR
, "error: could not load journal inode");
2164 iput(journal_inode
);
2167 journal
->j_private
= sb
;
2168 ext3_init_journal_params(sb
, journal
);
2172 static journal_t
*ext3_get_dev_journal(struct super_block
*sb
,
2175 struct buffer_head
* bh
;
2179 int hblock
, blocksize
;
2180 ext3_fsblk_t sb_block
;
2181 unsigned long offset
;
2182 struct ext3_super_block
* es
;
2183 struct block_device
*bdev
;
2185 bdev
= ext3_blkdev_get(j_dev
, sb
);
2189 blocksize
= sb
->s_blocksize
;
2190 hblock
= bdev_logical_block_size(bdev
);
2191 if (blocksize
< hblock
) {
2192 ext3_msg(sb
, KERN_ERR
,
2193 "error: blocksize too small for journal device");
2197 sb_block
= EXT3_MIN_BLOCK_SIZE
/ blocksize
;
2198 offset
= EXT3_MIN_BLOCK_SIZE
% blocksize
;
2199 set_blocksize(bdev
, blocksize
);
2200 if (!(bh
= __bread(bdev
, sb_block
, blocksize
))) {
2201 ext3_msg(sb
, KERN_ERR
, "error: couldn't read superblock of "
2202 "external journal");
2206 es
= (struct ext3_super_block
*) (bh
->b_data
+ offset
);
2207 if ((le16_to_cpu(es
->s_magic
) != EXT3_SUPER_MAGIC
) ||
2208 !(le32_to_cpu(es
->s_feature_incompat
) &
2209 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV
)) {
2210 ext3_msg(sb
, KERN_ERR
, "error: external journal has "
2216 if (memcmp(EXT3_SB(sb
)->s_es
->s_journal_uuid
, es
->s_uuid
, 16)) {
2217 ext3_msg(sb
, KERN_ERR
, "error: journal UUID does not match");
2222 len
= le32_to_cpu(es
->s_blocks_count
);
2223 start
= sb_block
+ 1;
2224 brelse(bh
); /* we're done with the superblock */
2226 journal
= journal_init_dev(bdev
, sb
->s_bdev
,
2227 start
, len
, blocksize
);
2229 ext3_msg(sb
, KERN_ERR
,
2230 "error: failed to create device journal");
2233 journal
->j_private
= sb
;
2234 if (!bh_uptodate_or_lock(journal
->j_sb_buffer
)) {
2235 if (bh_submit_read(journal
->j_sb_buffer
)) {
2236 ext3_msg(sb
, KERN_ERR
, "I/O error on journal device");
2240 if (be32_to_cpu(journal
->j_superblock
->s_nr_users
) != 1) {
2241 ext3_msg(sb
, KERN_ERR
,
2242 "error: external journal has more than one "
2243 "user (unsupported) - %d",
2244 be32_to_cpu(journal
->j_superblock
->s_nr_users
));
2247 EXT3_SB(sb
)->journal_bdev
= bdev
;
2248 ext3_init_journal_params(sb
, journal
);
2251 journal_destroy(journal
);
2253 ext3_blkdev_put(bdev
);
2257 static int ext3_load_journal(struct super_block
*sb
,
2258 struct ext3_super_block
*es
,
2259 unsigned long journal_devnum
)
2262 unsigned int journal_inum
= le32_to_cpu(es
->s_journal_inum
);
2265 int really_read_only
;
2267 if (journal_devnum
&&
2268 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2269 ext3_msg(sb
, KERN_INFO
, "external journal device major/minor "
2270 "numbers have changed");
2271 journal_dev
= new_decode_dev(journal_devnum
);
2273 journal_dev
= new_decode_dev(le32_to_cpu(es
->s_journal_dev
));
2275 really_read_only
= bdev_read_only(sb
->s_bdev
);
2278 * Are we loading a blank journal or performing recovery after a
2279 * crash? For recovery, we need to check in advance whether we
2280 * can get read-write access to the device.
2283 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
)) {
2284 if (sb
->s_flags
& MS_RDONLY
) {
2285 ext3_msg(sb
, KERN_INFO
,
2286 "recovery required on readonly filesystem");
2287 if (really_read_only
) {
2288 ext3_msg(sb
, KERN_ERR
, "error: write access "
2289 "unavailable, cannot proceed");
2292 ext3_msg(sb
, KERN_INFO
,
2293 "write access will be enabled during recovery");
2297 if (journal_inum
&& journal_dev
) {
2298 ext3_msg(sb
, KERN_ERR
, "error: filesystem has both journal "
2299 "and inode journals");
2304 if (!(journal
= ext3_get_journal(sb
, journal_inum
)))
2307 if (!(journal
= ext3_get_dev_journal(sb
, journal_dev
)))
2311 if (!(journal
->j_flags
& JFS_BARRIER
))
2312 printk(KERN_INFO
"EXT3-fs: barriers not enabled\n");
2314 if (!really_read_only
&& test_opt(sb
, UPDATE_JOURNAL
)) {
2315 err
= journal_update_format(journal
);
2317 ext3_msg(sb
, KERN_ERR
, "error updating journal");
2318 journal_destroy(journal
);
2323 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
))
2324 err
= journal_wipe(journal
, !really_read_only
);
2326 err
= journal_load(journal
);
2329 ext3_msg(sb
, KERN_ERR
, "error loading journal");
2330 journal_destroy(journal
);
2334 EXT3_SB(sb
)->s_journal
= journal
;
2335 ext3_clear_journal_err(sb
, es
);
2337 if (!really_read_only
&& journal_devnum
&&
2338 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2339 es
->s_journal_dev
= cpu_to_le32(journal_devnum
);
2341 /* Make sure we flush the recovery flag to disk. */
2342 ext3_commit_super(sb
, es
, 1);
2348 static int ext3_create_journal(struct super_block
*sb
,
2349 struct ext3_super_block
*es
,
2350 unsigned int journal_inum
)
2355 if (sb
->s_flags
& MS_RDONLY
) {
2356 ext3_msg(sb
, KERN_ERR
,
2357 "error: readonly filesystem when trying to "
2362 journal
= ext3_get_journal(sb
, journal_inum
);
2366 ext3_msg(sb
, KERN_INFO
, "creating new journal on inode %u",
2369 err
= journal_create(journal
);
2371 ext3_msg(sb
, KERN_ERR
, "error creating journal");
2372 journal_destroy(journal
);
2376 EXT3_SB(sb
)->s_journal
= journal
;
2378 ext3_update_dynamic_rev(sb
);
2379 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2380 EXT3_SET_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
);
2382 es
->s_journal_inum
= cpu_to_le32(journal_inum
);
2384 /* Make sure we flush the recovery flag to disk. */
2385 ext3_commit_super(sb
, es
, 1);
2390 static int ext3_commit_super(struct super_block
*sb
,
2391 struct ext3_super_block
*es
,
2394 struct buffer_head
*sbh
= EXT3_SB(sb
)->s_sbh
;
2400 if (buffer_write_io_error(sbh
)) {
2402 * Oh, dear. A previous attempt to write the
2403 * superblock failed. This could happen because the
2404 * USB device was yanked out. Or it could happen to
2405 * be a transient write error and maybe the block will
2406 * be remapped. Nothing we can do but to retry the
2407 * write and hope for the best.
2409 ext3_msg(sb
, KERN_ERR
, "previous I/O error to "
2410 "superblock detected");
2411 clear_buffer_write_io_error(sbh
);
2412 set_buffer_uptodate(sbh
);
2415 * If the file system is mounted read-only, don't update the
2416 * superblock write time. This avoids updating the superblock
2417 * write time when we are mounting the root file system
2418 * read/only but we need to replay the journal; at that point,
2419 * for people who are east of GMT and who make their clock
2420 * tick in localtime for Windows bug-for-bug compatibility,
2421 * the clock is set in the future, and this will cause e2fsck
2422 * to complain and force a full file system check.
2424 if (!(sb
->s_flags
& MS_RDONLY
))
2425 es
->s_wtime
= cpu_to_le32(get_seconds());
2426 es
->s_free_blocks_count
= cpu_to_le32(ext3_count_free_blocks(sb
));
2427 es
->s_free_inodes_count
= cpu_to_le32(ext3_count_free_inodes(sb
));
2428 BUFFER_TRACE(sbh
, "marking dirty");
2429 mark_buffer_dirty(sbh
);
2431 error
= sync_dirty_buffer(sbh
);
2432 if (buffer_write_io_error(sbh
)) {
2433 ext3_msg(sb
, KERN_ERR
, "I/O error while writing "
2435 clear_buffer_write_io_error(sbh
);
2436 set_buffer_uptodate(sbh
);
2444 * Have we just finished recovery? If so, and if we are mounting (or
2445 * remounting) the filesystem readonly, then we will end up with a
2446 * consistent fs on disk. Record that fact.
2448 static void ext3_mark_recovery_complete(struct super_block
* sb
,
2449 struct ext3_super_block
* es
)
2451 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
2453 journal_lock_updates(journal
);
2454 if (journal_flush(journal
) < 0)
2457 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
) &&
2458 sb
->s_flags
& MS_RDONLY
) {
2459 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2460 ext3_commit_super(sb
, es
, 1);
2464 journal_unlock_updates(journal
);
2468 * If we are mounting (or read-write remounting) a filesystem whose journal
2469 * has recorded an error from a previous lifetime, move that error to the
2470 * main filesystem now.
2472 static void ext3_clear_journal_err(struct super_block
*sb
,
2473 struct ext3_super_block
*es
)
2479 journal
= EXT3_SB(sb
)->s_journal
;
2482 * Now check for any error status which may have been recorded in the
2483 * journal by a prior ext3_error() or ext3_abort()
2486 j_errno
= journal_errno(journal
);
2490 errstr
= ext3_decode_error(sb
, j_errno
, nbuf
);
2491 ext3_warning(sb
, __func__
, "Filesystem error recorded "
2492 "from previous mount: %s", errstr
);
2493 ext3_warning(sb
, __func__
, "Marking fs in need of "
2494 "filesystem check.");
2496 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
2497 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
2498 ext3_commit_super (sb
, es
, 1);
2500 journal_clear_err(journal
);
2505 * Force the running and committing transactions to commit,
2506 * and wait on the commit.
2508 int ext3_force_commit(struct super_block
*sb
)
2513 if (sb
->s_flags
& MS_RDONLY
)
2516 journal
= EXT3_SB(sb
)->s_journal
;
2517 ret
= ext3_journal_force_commit(journal
);
2521 static int ext3_sync_fs(struct super_block
*sb
, int wait
)
2525 trace_ext3_sync_fs(sb
, wait
);
2527 * Writeback quota in non-journalled quota case - journalled quota has
2530 dquot_writeback_dquots(sb
, -1);
2531 if (journal_start_commit(EXT3_SB(sb
)->s_journal
, &target
)) {
2533 log_wait_commit(EXT3_SB(sb
)->s_journal
, target
);
2539 * LVM calls this function before a (read-only) snapshot is created. This
2540 * gives us a chance to flush the journal completely and mark the fs clean.
2542 static int ext3_freeze(struct super_block
*sb
)
2547 if (!(sb
->s_flags
& MS_RDONLY
)) {
2548 journal
= EXT3_SB(sb
)->s_journal
;
2550 /* Now we set up the journal barrier. */
2551 journal_lock_updates(journal
);
2554 * We don't want to clear needs_recovery flag when we failed
2555 * to flush the journal.
2557 error
= journal_flush(journal
);
2561 /* Journal blocked and flushed, clear needs_recovery flag. */
2562 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2563 error
= ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2570 journal_unlock_updates(journal
);
2575 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2576 * flag here, even though the filesystem is not technically dirty yet.
2578 static int ext3_unfreeze(struct super_block
*sb
)
2580 if (!(sb
->s_flags
& MS_RDONLY
)) {
2581 /* Reser the needs_recovery flag before the fs is unlocked. */
2582 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2583 ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2584 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2589 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
)
2591 struct ext3_super_block
* es
;
2592 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2593 ext3_fsblk_t n_blocks_count
= 0;
2594 unsigned long old_sb_flags
;
2595 struct ext3_mount_options old_opts
;
2596 int enable_quota
= 0;
2602 /* Store the original options */
2603 old_sb_flags
= sb
->s_flags
;
2604 old_opts
.s_mount_opt
= sbi
->s_mount_opt
;
2605 old_opts
.s_resuid
= sbi
->s_resuid
;
2606 old_opts
.s_resgid
= sbi
->s_resgid
;
2607 old_opts
.s_commit_interval
= sbi
->s_commit_interval
;
2609 old_opts
.s_jquota_fmt
= sbi
->s_jquota_fmt
;
2610 for (i
= 0; i
< MAXQUOTAS
; i
++)
2611 if (sbi
->s_qf_names
[i
]) {
2612 old_opts
.s_qf_names
[i
] = kstrdup(sbi
->s_qf_names
[i
],
2614 if (!old_opts
.s_qf_names
[i
]) {
2617 for (j
= 0; j
< i
; j
++)
2618 kfree(old_opts
.s_qf_names
[j
]);
2622 old_opts
.s_qf_names
[i
] = NULL
;
2626 * Allow the "check" option to be passed as a remount option.
2628 if (!parse_options(data
, sb
, NULL
, NULL
, &n_blocks_count
, 1)) {
2633 if (test_opt(sb
, ABORT
))
2634 ext3_abort(sb
, __func__
, "Abort forced by user");
2636 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
2637 (test_opt(sb
, POSIX_ACL
) ? MS_POSIXACL
: 0);
2641 ext3_init_journal_params(sb
, sbi
->s_journal
);
2643 if ((*flags
& MS_RDONLY
) != (sb
->s_flags
& MS_RDONLY
) ||
2644 n_blocks_count
> le32_to_cpu(es
->s_blocks_count
)) {
2645 if (test_opt(sb
, ABORT
)) {
2650 if (*flags
& MS_RDONLY
) {
2651 err
= dquot_suspend(sb
, -1);
2656 * First of all, the unconditional stuff we have to do
2657 * to disable replay of the journal when we next remount
2659 sb
->s_flags
|= MS_RDONLY
;
2662 * OK, test if we are remounting a valid rw partition
2663 * readonly, and if so set the rdonly flag and then
2664 * mark the partition as valid again.
2666 if (!(es
->s_state
& cpu_to_le16(EXT3_VALID_FS
)) &&
2667 (sbi
->s_mount_state
& EXT3_VALID_FS
))
2668 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
2670 ext3_mark_recovery_complete(sb
, es
);
2673 if ((ret
= EXT3_HAS_RO_COMPAT_FEATURE(sb
,
2674 ~EXT3_FEATURE_RO_COMPAT_SUPP
))) {
2675 ext3_msg(sb
, KERN_WARNING
,
2676 "warning: couldn't remount RDWR "
2677 "because of unsupported optional "
2678 "features (%x)", le32_to_cpu(ret
));
2684 * If we have an unprocessed orphan list hanging
2685 * around from a previously readonly bdev mount,
2686 * require a full umount & mount for now.
2688 if (es
->s_last_orphan
) {
2689 ext3_msg(sb
, KERN_WARNING
, "warning: couldn't "
2690 "remount RDWR because of unprocessed "
2691 "orphan inode list. Please "
2692 "umount & mount instead.");
2698 * Mounting a RDONLY partition read-write, so reread
2699 * and store the current valid flag. (It may have
2700 * been changed by e2fsck since we originally mounted
2703 ext3_clear_journal_err(sb
, es
);
2704 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
2705 if ((err
= ext3_group_extend(sb
, es
, n_blocks_count
)))
2707 if (!ext3_setup_super (sb
, es
, 0))
2708 sb
->s_flags
&= ~MS_RDONLY
;
2713 /* Release old quota file names */
2714 for (i
= 0; i
< MAXQUOTAS
; i
++)
2715 kfree(old_opts
.s_qf_names
[i
]);
2718 dquot_resume(sb
, -1);
2721 sb
->s_flags
= old_sb_flags
;
2722 sbi
->s_mount_opt
= old_opts
.s_mount_opt
;
2723 sbi
->s_resuid
= old_opts
.s_resuid
;
2724 sbi
->s_resgid
= old_opts
.s_resgid
;
2725 sbi
->s_commit_interval
= old_opts
.s_commit_interval
;
2727 sbi
->s_jquota_fmt
= old_opts
.s_jquota_fmt
;
2728 for (i
= 0; i
< MAXQUOTAS
; i
++) {
2729 kfree(sbi
->s_qf_names
[i
]);
2730 sbi
->s_qf_names
[i
] = old_opts
.s_qf_names
[i
];
2736 static int ext3_statfs (struct dentry
* dentry
, struct kstatfs
* buf
)
2738 struct super_block
*sb
= dentry
->d_sb
;
2739 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2740 struct ext3_super_block
*es
= sbi
->s_es
;
2743 if (test_opt(sb
, MINIX_DF
)) {
2744 sbi
->s_overhead_last
= 0;
2745 } else if (sbi
->s_blocks_last
!= le32_to_cpu(es
->s_blocks_count
)) {
2746 unsigned long ngroups
= sbi
->s_groups_count
, i
;
2747 ext3_fsblk_t overhead
= 0;
2751 * Compute the overhead (FS structures). This is constant
2752 * for a given filesystem unless the number of block groups
2753 * changes so we cache the previous value until it does.
2757 * All of the blocks before first_data_block are
2760 overhead
= le32_to_cpu(es
->s_first_data_block
);
2763 * Add the overhead attributed to the superblock and
2764 * block group descriptors. If the sparse superblocks
2765 * feature is turned on, then not all groups have this.
2767 for (i
= 0; i
< ngroups
; i
++) {
2768 overhead
+= ext3_bg_has_super(sb
, i
) +
2769 ext3_bg_num_gdb(sb
, i
);
2774 * Every block group has an inode bitmap, a block
2775 * bitmap, and an inode table.
2777 overhead
+= ngroups
* (2 + sbi
->s_itb_per_group
);
2778 sbi
->s_overhead_last
= overhead
;
2780 sbi
->s_blocks_last
= le32_to_cpu(es
->s_blocks_count
);
2783 buf
->f_type
= EXT3_SUPER_MAGIC
;
2784 buf
->f_bsize
= sb
->s_blocksize
;
2785 buf
->f_blocks
= le32_to_cpu(es
->s_blocks_count
) - sbi
->s_overhead_last
;
2786 buf
->f_bfree
= percpu_counter_sum_positive(&sbi
->s_freeblocks_counter
);
2787 buf
->f_bavail
= buf
->f_bfree
- le32_to_cpu(es
->s_r_blocks_count
);
2788 if (buf
->f_bfree
< le32_to_cpu(es
->s_r_blocks_count
))
2790 buf
->f_files
= le32_to_cpu(es
->s_inodes_count
);
2791 buf
->f_ffree
= percpu_counter_sum_positive(&sbi
->s_freeinodes_counter
);
2792 buf
->f_namelen
= EXT3_NAME_LEN
;
2793 fsid
= le64_to_cpup((void *)es
->s_uuid
) ^
2794 le64_to_cpup((void *)es
->s_uuid
+ sizeof(u64
));
2795 buf
->f_fsid
.val
[0] = fsid
& 0xFFFFFFFFUL
;
2796 buf
->f_fsid
.val
[1] = (fsid
>> 32) & 0xFFFFFFFFUL
;
2800 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2801 * is locked for write. Otherwise the are possible deadlocks:
2802 * Process 1 Process 2
2803 * ext3_create() quota_sync()
2804 * journal_start() write_dquot()
2805 * dquot_initialize() down(dqio_mutex)
2806 * down(dqio_mutex) journal_start()
2812 static inline struct inode
*dquot_to_inode(struct dquot
*dquot
)
2814 return sb_dqopt(dquot
->dq_sb
)->files
[dquot
->dq_id
.type
];
2817 static int ext3_write_dquot(struct dquot
*dquot
)
2821 struct inode
*inode
;
2823 inode
= dquot_to_inode(dquot
);
2824 handle
= ext3_journal_start(inode
,
2825 EXT3_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
2827 return PTR_ERR(handle
);
2828 ret
= dquot_commit(dquot
);
2829 err
= ext3_journal_stop(handle
);
2835 static int ext3_acquire_dquot(struct dquot
*dquot
)
2840 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2841 EXT3_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
2843 return PTR_ERR(handle
);
2844 ret
= dquot_acquire(dquot
);
2845 err
= ext3_journal_stop(handle
);
2851 static int ext3_release_dquot(struct dquot
*dquot
)
2856 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2857 EXT3_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
2858 if (IS_ERR(handle
)) {
2859 /* Release dquot anyway to avoid endless cycle in dqput() */
2860 dquot_release(dquot
);
2861 return PTR_ERR(handle
);
2863 ret
= dquot_release(dquot
);
2864 err
= ext3_journal_stop(handle
);
2870 static int ext3_mark_dquot_dirty(struct dquot
*dquot
)
2872 /* Are we journaling quotas? */
2873 if (EXT3_SB(dquot
->dq_sb
)->s_qf_names
[USRQUOTA
] ||
2874 EXT3_SB(dquot
->dq_sb
)->s_qf_names
[GRPQUOTA
]) {
2875 dquot_mark_dquot_dirty(dquot
);
2876 return ext3_write_dquot(dquot
);
2878 return dquot_mark_dquot_dirty(dquot
);
2882 static int ext3_write_info(struct super_block
*sb
, int type
)
2887 /* Data block + inode block */
2888 handle
= ext3_journal_start(sb
->s_root
->d_inode
, 2);
2890 return PTR_ERR(handle
);
2891 ret
= dquot_commit_info(sb
, type
);
2892 err
= ext3_journal_stop(handle
);
2899 * Turn on quotas during mount time - we need to find
2900 * the quota file and such...
2902 static int ext3_quota_on_mount(struct super_block
*sb
, int type
)
2904 return dquot_quota_on_mount(sb
, EXT3_SB(sb
)->s_qf_names
[type
],
2905 EXT3_SB(sb
)->s_jquota_fmt
, type
);
2909 * Standard function to be called on quota_on
2911 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
2916 if (!test_opt(sb
, QUOTA
))
2919 /* Quotafile not on the same filesystem? */
2920 if (path
->dentry
->d_sb
!= sb
)
2922 /* Journaling quota? */
2923 if (EXT3_SB(sb
)->s_qf_names
[type
]) {
2924 /* Quotafile not of fs root? */
2925 if (path
->dentry
->d_parent
!= sb
->s_root
)
2926 ext3_msg(sb
, KERN_WARNING
,
2927 "warning: Quota file not on filesystem root. "
2928 "Journaled quota will not work.");
2932 * When we journal data on quota file, we have to flush journal to see
2933 * all updates to the file when we bypass pagecache...
2935 if (ext3_should_journal_data(path
->dentry
->d_inode
)) {
2937 * We don't need to lock updates but journal_flush() could
2938 * otherwise be livelocked...
2940 journal_lock_updates(EXT3_SB(sb
)->s_journal
);
2941 err
= journal_flush(EXT3_SB(sb
)->s_journal
);
2942 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2947 return dquot_quota_on(sb
, type
, format_id
, path
);
2950 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2951 * acquiring the locks... As quota files are never truncated and quota code
2952 * itself serializes the operations (and no one else should touch the files)
2953 * we don't have to be afraid of races */
2954 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
2955 size_t len
, loff_t off
)
2957 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2958 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2960 int offset
= off
& (sb
->s_blocksize
- 1);
2963 struct buffer_head
*bh
;
2964 loff_t i_size
= i_size_read(inode
);
2968 if (off
+len
> i_size
)
2971 while (toread
> 0) {
2972 tocopy
= sb
->s_blocksize
- offset
< toread
?
2973 sb
->s_blocksize
- offset
: toread
;
2974 bh
= ext3_bread(NULL
, inode
, blk
, 0, &err
);
2977 if (!bh
) /* A hole? */
2978 memset(data
, 0, tocopy
);
2980 memcpy(data
, bh
->b_data
+offset
, tocopy
);
2990 /* Write to quotafile (we know the transaction is already started and has
2991 * enough credits) */
2992 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
2993 const char *data
, size_t len
, loff_t off
)
2995 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2996 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2998 int offset
= off
& (sb
->s_blocksize
- 1);
2999 int journal_quota
= EXT3_SB(sb
)->s_qf_names
[type
] != NULL
;
3000 struct buffer_head
*bh
;
3001 handle_t
*handle
= journal_current_handle();
3004 ext3_msg(sb
, KERN_WARNING
,
3005 "warning: quota write (off=%llu, len=%llu)"
3006 " cancelled because transaction is not started.",
3007 (unsigned long long)off
, (unsigned long long)len
);
3012 * Since we account only one data block in transaction credits,
3013 * then it is impossible to cross a block boundary.
3015 if (sb
->s_blocksize
- offset
< len
) {
3016 ext3_msg(sb
, KERN_WARNING
, "Quota write (off=%llu, len=%llu)"
3017 " cancelled because not block aligned",
3018 (unsigned long long)off
, (unsigned long long)len
);
3021 bh
= ext3_bread(handle
, inode
, blk
, 1, &err
);
3024 if (journal_quota
) {
3025 err
= ext3_journal_get_write_access(handle
, bh
);
3032 memcpy(bh
->b_data
+offset
, data
, len
);
3033 flush_dcache_page(bh
->b_page
);
3036 err
= ext3_journal_dirty_metadata(handle
, bh
);
3038 /* Always do at least ordered writes for quotas */
3039 err
= ext3_journal_dirty_data(handle
, bh
);
3040 mark_buffer_dirty(bh
);
3046 if (inode
->i_size
< off
+ len
) {
3047 i_size_write(inode
, off
+ len
);
3048 EXT3_I(inode
)->i_disksize
= inode
->i_size
;
3051 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
3052 ext3_mark_inode_dirty(handle
, inode
);
3058 static struct dentry
*ext3_mount(struct file_system_type
*fs_type
,
3059 int flags
, const char *dev_name
, void *data
)
3061 return mount_bdev(fs_type
, flags
, dev_name
, data
, ext3_fill_super
);
3064 static struct file_system_type ext3_fs_type
= {
3065 .owner
= THIS_MODULE
,
3067 .mount
= ext3_mount
,
3068 .kill_sb
= kill_block_super
,
3069 .fs_flags
= FS_REQUIRES_DEV
,
3071 MODULE_ALIAS_FS("ext3");
3073 static int __init
init_ext3_fs(void)
3075 int err
= init_ext3_xattr();
3078 err
= init_inodecache();
3081 err
= register_filesystem(&ext3_fs_type
);
3086 destroy_inodecache();
3092 static void __exit
exit_ext3_fs(void)
3094 unregister_filesystem(&ext3_fs_type
);
3095 destroy_inodecache();
3099 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3100 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3101 MODULE_LICENSE("GPL");
3102 module_init(init_ext3_fs
)
3103 module_exit(exit_ext3_fs
)