2 * linux/fs/ext3/super.c
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
11 * linux/fs/minix/inode.c
13 * Copyright (C) 1991, 1992 Linus Torvalds
15 * Big-endian to little-endian byte-swapping/bitmaps by
16 * David S. Miller (davem@caip.rutgers.edu), 1995
19 #include <linux/module.h>
20 #include <linux/string.h>
22 #include <linux/time.h>
23 #include <linux/jbd.h>
24 #include <linux/ext3_fs.h>
25 #include <linux/ext3_jbd.h>
26 #include <linux/slab.h>
27 #include <linux/init.h>
28 #include <linux/blkdev.h>
29 #include <linux/parser.h>
30 #include <linux/smp_lock.h>
31 #include <linux/buffer_head.h>
32 #include <linux/exportfs.h>
33 #include <linux/vfs.h>
34 #include <linux/random.h>
35 #include <linux/mount.h>
36 #include <linux/namei.h>
37 #include <linux/quotaops.h>
38 #include <linux/seq_file.h>
39 #include <linux/log2.h>
41 #include <asm/uaccess.h>
47 #ifdef CONFIG_EXT3_DEFAULTS_TO_ORDERED
48 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_ORDERED_DATA
50 #define EXT3_MOUNT_DEFAULT_DATA_MODE EXT3_MOUNT_WRITEBACK_DATA
53 static int ext3_load_journal(struct super_block
*, struct ext3_super_block
*,
54 unsigned long journal_devnum
);
55 static int ext3_create_journal(struct super_block
*, struct ext3_super_block
*,
57 static int ext3_commit_super(struct super_block
*sb
,
58 struct ext3_super_block
*es
,
60 static void ext3_mark_recovery_complete(struct super_block
* sb
,
61 struct ext3_super_block
* es
);
62 static void ext3_clear_journal_err(struct super_block
* sb
,
63 struct ext3_super_block
* es
);
64 static int ext3_sync_fs(struct super_block
*sb
, int wait
);
65 static const char *ext3_decode_error(struct super_block
* sb
, int errno
,
67 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
);
68 static int ext3_statfs (struct dentry
* dentry
, struct kstatfs
* buf
);
69 static int ext3_unfreeze(struct super_block
*sb
);
70 static int ext3_freeze(struct super_block
*sb
);
73 * Wrappers for journal_start/end.
75 * The only special thing we need to do here is to make sure that all
76 * journal_end calls result in the superblock being marked dirty, so
77 * that sync() will call the filesystem's write_super callback if
80 handle_t
*ext3_journal_start_sb(struct super_block
*sb
, int nblocks
)
84 if (sb
->s_flags
& MS_RDONLY
)
85 return ERR_PTR(-EROFS
);
87 /* Special case here: if the journal has aborted behind our
88 * backs (eg. EIO in the commit thread), then we still need to
89 * take the FS itself readonly cleanly. */
90 journal
= EXT3_SB(sb
)->s_journal
;
91 if (is_journal_aborted(journal
)) {
92 ext3_abort(sb
, __func__
,
93 "Detected aborted journal");
94 return ERR_PTR(-EROFS
);
97 return journal_start(journal
, nblocks
);
101 * The only special thing we need to do here is to make sure that all
102 * journal_stop calls result in the superblock being marked dirty, so
103 * that sync() will call the filesystem's write_super callback if
106 int __ext3_journal_stop(const char *where
, handle_t
*handle
)
108 struct super_block
*sb
;
112 sb
= handle
->h_transaction
->t_journal
->j_private
;
114 rc
= journal_stop(handle
);
119 __ext3_std_error(sb
, where
, err
);
123 void ext3_journal_abort_handle(const char *caller
, const char *err_fn
,
124 struct buffer_head
*bh
, handle_t
*handle
, int err
)
127 const char *errstr
= ext3_decode_error(NULL
, err
, nbuf
);
130 BUFFER_TRACE(bh
, "abort");
135 if (is_handle_aborted(handle
))
138 printk(KERN_ERR
"EXT3-fs: %s: aborting transaction: %s in %s\n",
139 caller
, errstr
, err_fn
);
141 journal_abort_handle(handle
);
144 void ext3_msg(struct super_block
*sb
, const char *prefix
,
145 const char *fmt
, ...)
150 printk("%sEXT3-fs (%s): ", prefix
, sb
->s_id
);
156 /* Deal with the reporting of failure conditions on a filesystem such as
157 * inconsistencies detected or read IO failures.
159 * On ext2, we can store the error state of the filesystem in the
160 * superblock. That is not possible on ext3, because we may have other
161 * write ordering constraints on the superblock which prevent us from
162 * writing it out straight away; and given that the journal is about to
163 * be aborted, we can't rely on the current, or future, transactions to
164 * write out the superblock safely.
166 * We'll just use the journal_abort() error code to record an error in
167 * the journal instead. On recovery, the journal will compain about
168 * that error until we've noted it down and cleared it.
171 static void ext3_handle_error(struct super_block
*sb
)
173 struct ext3_super_block
*es
= EXT3_SB(sb
)->s_es
;
175 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
176 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
178 if (sb
->s_flags
& MS_RDONLY
)
181 if (!test_opt (sb
, ERRORS_CONT
)) {
182 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
184 set_opt(EXT3_SB(sb
)->s_mount_opt
, ABORT
);
186 journal_abort(journal
, -EIO
);
188 if (test_opt (sb
, ERRORS_RO
)) {
189 ext3_msg(sb
, KERN_CRIT
,
190 "error: remounting filesystem read-only");
191 sb
->s_flags
|= MS_RDONLY
;
193 ext3_commit_super(sb
, es
, 1);
194 if (test_opt(sb
, ERRORS_PANIC
))
195 panic("EXT3-fs (%s): panic forced after error\n",
199 void ext3_error (struct super_block
* sb
, const char * function
,
200 const char * fmt
, ...)
205 printk(KERN_CRIT
"EXT3-fs error (device %s): %s: ",sb
->s_id
, function
);
210 ext3_handle_error(sb
);
213 static const char *ext3_decode_error(struct super_block
* sb
, int errno
,
220 errstr
= "IO failure";
223 errstr
= "Out of memory";
226 if (!sb
|| EXT3_SB(sb
)->s_journal
->j_flags
& JFS_ABORT
)
227 errstr
= "Journal has aborted";
229 errstr
= "Readonly filesystem";
232 /* If the caller passed in an extra buffer for unknown
233 * errors, textualise them now. Else we just return
236 /* Check for truncated error codes... */
237 if (snprintf(nbuf
, 16, "error %d", -errno
) >= 0)
246 /* __ext3_std_error decodes expected errors from journaling functions
247 * automatically and invokes the appropriate error response. */
249 void __ext3_std_error (struct super_block
* sb
, const char * function
,
255 /* Special case: if the error is EROFS, and we're not already
256 * inside a transaction, then there's really no point in logging
258 if (errno
== -EROFS
&& journal_current_handle() == NULL
&&
259 (sb
->s_flags
& MS_RDONLY
))
262 errstr
= ext3_decode_error(sb
, errno
, nbuf
);
263 ext3_msg(sb
, KERN_CRIT
, "error in %s: %s", function
, errstr
);
265 ext3_handle_error(sb
);
269 * ext3_abort is a much stronger failure handler than ext3_error. The
270 * abort function may be used to deal with unrecoverable failures such
271 * as journal IO errors or ENOMEM at a critical moment in log management.
273 * We unconditionally force the filesystem into an ABORT|READONLY state,
274 * unless the error response on the fs has been set to panic in which
275 * case we take the easy way out and panic immediately.
278 void ext3_abort (struct super_block
* sb
, const char * function
,
279 const char * fmt
, ...)
284 printk(KERN_CRIT
"EXT3-fs (%s): error: %s: ", sb
->s_id
, function
);
289 if (test_opt(sb
, ERRORS_PANIC
))
290 panic("EXT3-fs: panic from previous error\n");
292 if (sb
->s_flags
& MS_RDONLY
)
295 ext3_msg(sb
, KERN_CRIT
,
296 "error: remounting filesystem read-only");
297 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
298 sb
->s_flags
|= MS_RDONLY
;
299 set_opt(EXT3_SB(sb
)->s_mount_opt
, ABORT
);
300 if (EXT3_SB(sb
)->s_journal
)
301 journal_abort(EXT3_SB(sb
)->s_journal
, -EIO
);
304 void ext3_warning (struct super_block
* sb
, const char * function
,
305 const char * fmt
, ...)
310 printk(KERN_WARNING
"EXT3-fs (%s): warning: %s: ",
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
= open_by_devnum(dev
, FMODE_READ
|FMODE_WRITE
);
356 ext3_msg(sb
, "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
)
368 return blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
);
371 static int ext3_blkdev_remove(struct ext3_sb_info
*sbi
)
373 struct block_device
*bdev
;
376 bdev
= sbi
->journal_bdev
;
378 ret
= ext3_blkdev_put(bdev
);
379 sbi
->journal_bdev
= NULL
;
384 static inline struct inode
*orphan_list_entry(struct list_head
*l
)
386 return &list_entry(l
, struct ext3_inode_info
, i_orphan
)->vfs_inode
;
389 static void dump_orphan_list(struct super_block
*sb
, struct ext3_sb_info
*sbi
)
393 ext3_msg(sb
, KERN_ERR
, "error: sb orphan head is %d",
394 le32_to_cpu(sbi
->s_es
->s_last_orphan
));
396 ext3_msg(sb
, KERN_ERR
, "sb_info orphan list:");
397 list_for_each(l
, &sbi
->s_orphan
) {
398 struct inode
*inode
= orphan_list_entry(l
);
399 ext3_msg(sb
, KERN_ERR
, " "
400 "inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
401 inode
->i_sb
->s_id
, inode
->i_ino
, inode
,
402 inode
->i_mode
, inode
->i_nlink
,
407 static void ext3_put_super (struct super_block
* sb
)
409 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
410 struct ext3_super_block
*es
= sbi
->s_es
;
415 ext3_xattr_put_super(sb
);
416 err
= journal_destroy(sbi
->s_journal
);
417 sbi
->s_journal
= NULL
;
419 ext3_abort(sb
, __func__
, "Couldn't clean up the journal");
421 if (!(sb
->s_flags
& MS_RDONLY
)) {
422 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
423 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
424 BUFFER_TRACE(sbi
->s_sbh
, "marking dirty");
425 mark_buffer_dirty(sbi
->s_sbh
);
426 ext3_commit_super(sb
, es
, 1);
429 for (i
= 0; i
< sbi
->s_gdb_count
; i
++)
430 brelse(sbi
->s_group_desc
[i
]);
431 kfree(sbi
->s_group_desc
);
432 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
433 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
434 percpu_counter_destroy(&sbi
->s_dirs_counter
);
437 for (i
= 0; i
< MAXQUOTAS
; i
++)
438 kfree(sbi
->s_qf_names
[i
]);
441 /* Debugging code just in case the in-memory inode orphan list
442 * isn't empty. The on-disk one can be non-empty if we've
443 * detected an error and taken the fs readonly, but the
444 * in-memory list had better be clean by this point. */
445 if (!list_empty(&sbi
->s_orphan
))
446 dump_orphan_list(sb
, sbi
);
447 J_ASSERT(list_empty(&sbi
->s_orphan
));
449 invalidate_bdev(sb
->s_bdev
);
450 if (sbi
->journal_bdev
&& sbi
->journal_bdev
!= sb
->s_bdev
) {
452 * Invalidate the journal device's buffers. We don't want them
453 * floating about in memory - the physical journal device may
454 * hotswapped, and it breaks the `ro-after' testing code.
456 sync_blockdev(sbi
->journal_bdev
);
457 invalidate_bdev(sbi
->journal_bdev
);
458 ext3_blkdev_remove(sbi
);
460 sb
->s_fs_info
= NULL
;
461 kfree(sbi
->s_blockgroup_lock
);
467 static struct kmem_cache
*ext3_inode_cachep
;
470 * Called inside transaction, so use GFP_NOFS
472 static struct inode
*ext3_alloc_inode(struct super_block
*sb
)
474 struct ext3_inode_info
*ei
;
476 ei
= kmem_cache_alloc(ext3_inode_cachep
, GFP_NOFS
);
479 ei
->i_block_alloc_info
= NULL
;
480 ei
->vfs_inode
.i_version
= 1;
481 atomic_set(&ei
->i_datasync_tid
, 0);
482 atomic_set(&ei
->i_sync_tid
, 0);
483 return &ei
->vfs_inode
;
486 static void ext3_destroy_inode(struct inode
*inode
)
488 if (!list_empty(&(EXT3_I(inode
)->i_orphan
))) {
489 printk("EXT3 Inode %p: orphan list check failed!\n",
491 print_hex_dump(KERN_INFO
, "", DUMP_PREFIX_ADDRESS
, 16, 4,
492 EXT3_I(inode
), sizeof(struct ext3_inode_info
),
496 kmem_cache_free(ext3_inode_cachep
, EXT3_I(inode
));
499 static void init_once(void *foo
)
501 struct ext3_inode_info
*ei
= (struct ext3_inode_info
*) foo
;
503 INIT_LIST_HEAD(&ei
->i_orphan
);
504 #ifdef CONFIG_EXT3_FS_XATTR
505 init_rwsem(&ei
->xattr_sem
);
507 mutex_init(&ei
->truncate_mutex
);
508 inode_init_once(&ei
->vfs_inode
);
511 static int init_inodecache(void)
513 ext3_inode_cachep
= kmem_cache_create("ext3_inode_cache",
514 sizeof(struct ext3_inode_info
),
515 0, (SLAB_RECLAIM_ACCOUNT
|
518 if (ext3_inode_cachep
== NULL
)
523 static void destroy_inodecache(void)
525 kmem_cache_destroy(ext3_inode_cachep
);
528 static void ext3_clear_inode(struct inode
*inode
)
530 struct ext3_block_alloc_info
*rsv
= EXT3_I(inode
)->i_block_alloc_info
;
531 ext3_discard_reservation(inode
);
532 EXT3_I(inode
)->i_block_alloc_info
= NULL
;
537 static inline void ext3_show_quota_options(struct seq_file
*seq
, struct super_block
*sb
)
539 #if defined(CONFIG_QUOTA)
540 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
542 if (sbi
->s_jquota_fmt
) {
545 switch (sbi
->s_jquota_fmt
) {
556 seq_printf(seq
, ",jqfmt=%s", fmtname
);
559 if (sbi
->s_qf_names
[USRQUOTA
])
560 seq_printf(seq
, ",usrjquota=%s", sbi
->s_qf_names
[USRQUOTA
]);
562 if (sbi
->s_qf_names
[GRPQUOTA
])
563 seq_printf(seq
, ",grpjquota=%s", sbi
->s_qf_names
[GRPQUOTA
]);
565 if (test_opt(sb
, USRQUOTA
))
566 seq_puts(seq
, ",usrquota");
568 if (test_opt(sb
, GRPQUOTA
))
569 seq_puts(seq
, ",grpquota");
573 static char *data_mode_string(unsigned long mode
)
576 case EXT3_MOUNT_JOURNAL_DATA
:
578 case EXT3_MOUNT_ORDERED_DATA
:
580 case EXT3_MOUNT_WRITEBACK_DATA
:
588 * - it's set to a non-default value OR
589 * - if the per-sb default is different from the global default
591 static int ext3_show_options(struct seq_file
*seq
, struct vfsmount
*vfs
)
593 struct super_block
*sb
= vfs
->mnt_sb
;
594 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
595 struct ext3_super_block
*es
= sbi
->s_es
;
596 unsigned long def_mount_opts
;
598 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
600 if (sbi
->s_sb_block
!= 1)
601 seq_printf(seq
, ",sb=%lu", sbi
->s_sb_block
);
602 if (test_opt(sb
, MINIX_DF
))
603 seq_puts(seq
, ",minixdf");
604 if (test_opt(sb
, GRPID
))
605 seq_puts(seq
, ",grpid");
606 if (!test_opt(sb
, GRPID
) && (def_mount_opts
& EXT3_DEFM_BSDGROUPS
))
607 seq_puts(seq
, ",nogrpid");
608 if (sbi
->s_resuid
!= EXT3_DEF_RESUID
||
609 le16_to_cpu(es
->s_def_resuid
) != EXT3_DEF_RESUID
) {
610 seq_printf(seq
, ",resuid=%u", sbi
->s_resuid
);
612 if (sbi
->s_resgid
!= EXT3_DEF_RESGID
||
613 le16_to_cpu(es
->s_def_resgid
) != EXT3_DEF_RESGID
) {
614 seq_printf(seq
, ",resgid=%u", sbi
->s_resgid
);
616 if (test_opt(sb
, ERRORS_RO
)) {
617 int def_errors
= le16_to_cpu(es
->s_errors
);
619 if (def_errors
== EXT3_ERRORS_PANIC
||
620 def_errors
== EXT3_ERRORS_CONTINUE
) {
621 seq_puts(seq
, ",errors=remount-ro");
624 if (test_opt(sb
, ERRORS_CONT
))
625 seq_puts(seq
, ",errors=continue");
626 if (test_opt(sb
, ERRORS_PANIC
))
627 seq_puts(seq
, ",errors=panic");
628 if (test_opt(sb
, NO_UID32
))
629 seq_puts(seq
, ",nouid32");
630 if (test_opt(sb
, DEBUG
))
631 seq_puts(seq
, ",debug");
632 if (test_opt(sb
, OLDALLOC
))
633 seq_puts(seq
, ",oldalloc");
634 #ifdef CONFIG_EXT3_FS_XATTR
635 if (test_opt(sb
, XATTR_USER
))
636 seq_puts(seq
, ",user_xattr");
637 if (!test_opt(sb
, XATTR_USER
) &&
638 (def_mount_opts
& EXT3_DEFM_XATTR_USER
)) {
639 seq_puts(seq
, ",nouser_xattr");
642 #ifdef CONFIG_EXT3_FS_POSIX_ACL
643 if (test_opt(sb
, POSIX_ACL
))
644 seq_puts(seq
, ",acl");
645 if (!test_opt(sb
, POSIX_ACL
) && (def_mount_opts
& EXT3_DEFM_ACL
))
646 seq_puts(seq
, ",noacl");
648 if (!test_opt(sb
, RESERVATION
))
649 seq_puts(seq
, ",noreservation");
650 if (sbi
->s_commit_interval
) {
651 seq_printf(seq
, ",commit=%u",
652 (unsigned) (sbi
->s_commit_interval
/ HZ
));
654 if (test_opt(sb
, BARRIER
))
655 seq_puts(seq
, ",barrier=1");
656 if (test_opt(sb
, NOBH
))
657 seq_puts(seq
, ",nobh");
659 seq_printf(seq
, ",data=%s", data_mode_string(test_opt(sb
, DATA_FLAGS
)));
660 if (test_opt(sb
, DATA_ERR_ABORT
))
661 seq_puts(seq
, ",data_err=abort");
663 if (test_opt(sb
, NOLOAD
))
664 seq_puts(seq
, ",norecovery");
666 ext3_show_quota_options(seq
, sb
);
672 static struct inode
*ext3_nfs_get_inode(struct super_block
*sb
,
673 u64 ino
, u32 generation
)
677 if (ino
< EXT3_FIRST_INO(sb
) && ino
!= EXT3_ROOT_INO
)
678 return ERR_PTR(-ESTALE
);
679 if (ino
> le32_to_cpu(EXT3_SB(sb
)->s_es
->s_inodes_count
))
680 return ERR_PTR(-ESTALE
);
682 /* iget isn't really right if the inode is currently unallocated!!
684 * ext3_read_inode will return a bad_inode if the inode had been
685 * deleted, so we should be safe.
687 * Currently we don't know the generation for parent directory, so
688 * a generation of 0 means "accept any"
690 inode
= ext3_iget(sb
, ino
);
692 return ERR_CAST(inode
);
693 if (generation
&& inode
->i_generation
!= generation
) {
695 return ERR_PTR(-ESTALE
);
701 static struct dentry
*ext3_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
702 int fh_len
, int fh_type
)
704 return generic_fh_to_dentry(sb
, fid
, fh_len
, fh_type
,
708 static struct dentry
*ext3_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
709 int fh_len
, int fh_type
)
711 return generic_fh_to_parent(sb
, fid
, fh_len
, fh_type
,
716 * Try to release metadata pages (indirect blocks, directories) which are
717 * mapped via the block device. Since these pages could have journal heads
718 * which would prevent try_to_free_buffers() from freeing them, we must use
719 * jbd layer's try_to_free_buffers() function to release them.
721 static int bdev_try_to_free_page(struct super_block
*sb
, struct page
*page
,
724 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
726 WARN_ON(PageChecked(page
));
727 if (!page_has_buffers(page
))
730 return journal_try_to_free_buffers(journal
, page
,
732 return try_to_free_buffers(page
);
736 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
737 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
739 static int ext3_write_dquot(struct dquot
*dquot
);
740 static int ext3_acquire_dquot(struct dquot
*dquot
);
741 static int ext3_release_dquot(struct dquot
*dquot
);
742 static int ext3_mark_dquot_dirty(struct dquot
*dquot
);
743 static int ext3_write_info(struct super_block
*sb
, int type
);
744 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
745 char *path
, int remount
);
746 static int ext3_quota_on_mount(struct super_block
*sb
, int type
);
747 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
748 size_t len
, loff_t off
);
749 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
750 const char *data
, size_t len
, loff_t off
);
752 static const struct dquot_operations ext3_quota_operations
= {
753 .initialize
= dquot_initialize
,
755 .alloc_space
= dquot_alloc_space
,
756 .alloc_inode
= dquot_alloc_inode
,
757 .free_space
= dquot_free_space
,
758 .free_inode
= dquot_free_inode
,
759 .transfer
= dquot_transfer
,
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
= vfs_quota_off
,
772 .quota_sync
= vfs_quota_sync
,
773 .get_info
= vfs_get_dqinfo
,
774 .set_info
= vfs_set_dqinfo
,
775 .get_dqblk
= vfs_get_dqblk
,
776 .set_dqblk
= vfs_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 .delete_inode
= ext3_delete_inode
,
786 .put_super
= ext3_put_super
,
787 .sync_fs
= ext3_sync_fs
,
788 .freeze_fs
= ext3_freeze
,
789 .unfreeze_fs
= ext3_unfreeze
,
790 .statfs
= ext3_statfs
,
791 .remount_fs
= ext3_remount
,
792 .clear_inode
= ext3_clear_inode
,
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_err
, Opt_resize
,
819 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_resize
, "resize"},
877 static ext3_fsblk_t
get_sb_block(void **data
, struct super_block
*sb
)
879 ext3_fsblk_t sb_block
;
880 char *options
= (char *) *data
;
882 if (!options
|| strncmp(options
, "sb=", 3) != 0)
883 return 1; /* Default location */
885 /*todo: use simple_strtoll with >32bit ext3 */
886 sb_block
= simple_strtoul(options
, &options
, 0);
887 if (*options
&& *options
!= ',') {
888 ext3_msg(sb
, "error: invalid sb specification: %s",
894 *data
= (void *) options
;
899 static int set_qf_name(struct super_block
*sb
, int qtype
, substring_t
*args
)
901 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
904 if (sb_any_quota_loaded(sb
) &&
905 !sbi
->s_qf_names
[qtype
]) {
906 ext3_msg(sb
, KERN_ERR
,
907 "Cannot change journaled "
908 "quota options when quota turned on");
911 qname
= match_strdup(args
);
913 ext3_msg(sb
, KERN_ERR
,
914 "Not enough memory for storing quotafile name");
917 if (sbi
->s_qf_names
[qtype
] &&
918 strcmp(sbi
->s_qf_names
[qtype
], qname
)) {
919 ext3_msg(sb
, KERN_ERR
,
920 "%s quota file already specified", QTYPE2NAME(qtype
));
924 sbi
->s_qf_names
[qtype
] = qname
;
925 if (strchr(sbi
->s_qf_names
[qtype
], '/')) {
926 ext3_msg(sb
, KERN_ERR
,
927 "quotafile must be on filesystem root");
928 kfree(sbi
->s_qf_names
[qtype
]);
929 sbi
->s_qf_names
[qtype
] = NULL
;
932 set_opt(sbi
->s_mount_opt
, QUOTA
);
936 static int clear_qf_name(struct super_block
*sb
, int qtype
) {
938 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
940 if (sb_any_quota_loaded(sb
) &&
941 sbi
->s_qf_names
[qtype
]) {
942 ext3_msg(sb
, KERN_ERR
, "Cannot change journaled quota options"
943 " when quota turned on");
947 * The space will be released later when all options are confirmed
950 sbi
->s_qf_names
[qtype
] = NULL
;
955 static int parse_options (char *options
, struct super_block
*sb
,
956 unsigned int *inum
, unsigned long *journal_devnum
,
957 ext3_fsblk_t
*n_blocks_count
, int is_remount
)
959 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
961 substring_t args
[MAX_OPT_ARGS
];
971 while ((p
= strsep (&options
, ",")) != NULL
) {
976 token
= match_token(p
, tokens
, args
);
979 clear_opt (sbi
->s_mount_opt
, MINIX_DF
);
982 set_opt (sbi
->s_mount_opt
, MINIX_DF
);
985 set_opt (sbi
->s_mount_opt
, GRPID
);
988 clear_opt (sbi
->s_mount_opt
, GRPID
);
991 if (match_int(&args
[0], &option
))
993 sbi
->s_resuid
= option
;
996 if (match_int(&args
[0], &option
))
998 sbi
->s_resgid
= option
;
1001 /* handled by get_sb_block() instead of here */
1002 /* *sb_block = match_int(&args[0]); */
1005 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
1006 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
1007 set_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
1010 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
1011 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
1012 set_opt (sbi
->s_mount_opt
, ERRORS_RO
);
1015 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
1016 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
1017 set_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
1020 set_opt (sbi
->s_mount_opt
, NO_UID32
);
1023 clear_opt (sbi
->s_mount_opt
, CHECK
);
1026 set_opt (sbi
->s_mount_opt
, DEBUG
);
1029 set_opt (sbi
->s_mount_opt
, OLDALLOC
);
1032 clear_opt (sbi
->s_mount_opt
, OLDALLOC
);
1034 #ifdef CONFIG_EXT3_FS_XATTR
1035 case Opt_user_xattr
:
1036 set_opt (sbi
->s_mount_opt
, XATTR_USER
);
1038 case Opt_nouser_xattr
:
1039 clear_opt (sbi
->s_mount_opt
, XATTR_USER
);
1042 case Opt_user_xattr
:
1043 case Opt_nouser_xattr
:
1044 ext3_msg(sb
, KERN_INFO
,
1045 "(no)user_xattr options not supported");
1048 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1050 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
1053 clear_opt(sbi
->s_mount_opt
, POSIX_ACL
);
1058 ext3_msg(sb
, KERN_INFO
,
1059 "(no)acl options not supported");
1062 case Opt_reservation
:
1063 set_opt(sbi
->s_mount_opt
, RESERVATION
);
1065 case Opt_noreservation
:
1066 clear_opt(sbi
->s_mount_opt
, RESERVATION
);
1068 case Opt_journal_update
:
1070 /* Eventually we will want to be able to create
1071 a journal file here. For now, only allow the
1072 user to specify an existing inode to be the
1075 ext3_msg(sb
, KERN_ERR
, "error: cannot specify "
1076 "journal on remount");
1079 set_opt (sbi
->s_mount_opt
, UPDATE_JOURNAL
);
1081 case Opt_journal_inum
:
1083 ext3_msg(sb
, KERN_ERR
, "error: cannot specify "
1084 "journal on remount");
1087 if (match_int(&args
[0], &option
))
1091 case Opt_journal_dev
:
1093 ext3_msg(sb
, KERN_ERR
, "error: cannot specify "
1094 "journal on remount");
1097 if (match_int(&args
[0], &option
))
1099 *journal_devnum
= option
;
1102 set_opt (sbi
->s_mount_opt
, NOLOAD
);
1105 if (match_int(&args
[0], &option
))
1110 option
= JBD_DEFAULT_MAX_COMMIT_AGE
;
1111 sbi
->s_commit_interval
= HZ
* option
;
1113 case Opt_data_journal
:
1114 data_opt
= EXT3_MOUNT_JOURNAL_DATA
;
1116 case Opt_data_ordered
:
1117 data_opt
= EXT3_MOUNT_ORDERED_DATA
;
1119 case Opt_data_writeback
:
1120 data_opt
= EXT3_MOUNT_WRITEBACK_DATA
;
1123 if (test_opt(sb
, DATA_FLAGS
) == data_opt
)
1125 ext3_msg(sb
, KERN_ERR
,
1126 "error: cannot change "
1127 "data mode on remount. The filesystem "
1128 "is mounted in data=%s mode and you "
1129 "try to remount it in data=%s mode.",
1130 data_mode_string(test_opt(sb
,
1132 data_mode_string(data_opt
));
1135 clear_opt(sbi
->s_mount_opt
, DATA_FLAGS
);
1136 sbi
->s_mount_opt
|= data_opt
;
1139 case Opt_data_err_abort
:
1140 set_opt(sbi
->s_mount_opt
, DATA_ERR_ABORT
);
1142 case Opt_data_err_ignore
:
1143 clear_opt(sbi
->s_mount_opt
, DATA_ERR_ABORT
);
1147 if (!set_qf_name(sb
, USRQUOTA
, &args
[0]))
1151 if (!set_qf_name(sb
, GRPQUOTA
, &args
[0]))
1154 case Opt_offusrjquota
:
1155 if (!clear_qf_name(sb
, USRQUOTA
))
1158 case Opt_offgrpjquota
:
1159 if (!clear_qf_name(sb
, GRPQUOTA
))
1162 case Opt_jqfmt_vfsold
:
1163 qfmt
= QFMT_VFS_OLD
;
1165 case Opt_jqfmt_vfsv0
:
1168 case Opt_jqfmt_vfsv1
:
1171 if (sb_any_quota_loaded(sb
) &&
1172 sbi
->s_jquota_fmt
!= qfmt
) {
1173 ext3_msg(sb
, KERN_ERR
, "error: cannot change "
1174 "journaled quota options when "
1175 "quota turned on.");
1178 sbi
->s_jquota_fmt
= qfmt
;
1182 set_opt(sbi
->s_mount_opt
, QUOTA
);
1183 set_opt(sbi
->s_mount_opt
, USRQUOTA
);
1186 set_opt(sbi
->s_mount_opt
, QUOTA
);
1187 set_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1190 if (sb_any_quota_loaded(sb
)) {
1191 ext3_msg(sb
, KERN_ERR
, "error: cannot change "
1192 "quota options when quota turned on.");
1195 clear_opt(sbi
->s_mount_opt
, QUOTA
);
1196 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1197 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1203 ext3_msg(sb
, KERN_ERR
,
1204 "error: quota options not supported.");
1208 case Opt_offusrjquota
:
1209 case Opt_offgrpjquota
:
1210 case Opt_jqfmt_vfsold
:
1211 case Opt_jqfmt_vfsv0
:
1212 case Opt_jqfmt_vfsv1
:
1213 ext3_msg(sb
, KERN_ERR
,
1214 "error: journaled quota options not "
1221 set_opt(sbi
->s_mount_opt
, ABORT
);
1224 if (match_int(&args
[0], &option
))
1227 set_opt(sbi
->s_mount_opt
, BARRIER
);
1229 clear_opt(sbi
->s_mount_opt
, BARRIER
);
1235 ext3_msg(sb
, KERN_ERR
,
1236 "error: resize option only available "
1240 if (match_int(&args
[0], &option
) != 0)
1242 *n_blocks_count
= option
;
1245 set_opt(sbi
->s_mount_opt
, NOBH
);
1248 clear_opt(sbi
->s_mount_opt
, NOBH
);
1251 ext3_msg(sb
, KERN_ERR
,
1252 "error: unrecognized mount option \"%s\" "
1253 "or missing value", p
);
1258 if (sbi
->s_qf_names
[USRQUOTA
] || sbi
->s_qf_names
[GRPQUOTA
]) {
1259 if (test_opt(sb
, USRQUOTA
) && sbi
->s_qf_names
[USRQUOTA
])
1260 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1261 if (test_opt(sb
, GRPQUOTA
) && sbi
->s_qf_names
[GRPQUOTA
])
1262 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1264 if (test_opt(sb
, GRPQUOTA
) || test_opt(sb
, USRQUOTA
)) {
1265 ext3_msg(sb
, KERN_ERR
, "error: old and new quota "
1270 if (!sbi
->s_jquota_fmt
) {
1271 ext3_msg(sb
, KERN_ERR
, "error: journaled quota format "
1276 if (sbi
->s_jquota_fmt
) {
1277 ext3_msg(sb
, KERN_ERR
, "error: journaled quota format "
1278 "specified with no journaling "
1287 static int ext3_setup_super(struct super_block
*sb
, struct ext3_super_block
*es
,
1290 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1293 if (le32_to_cpu(es
->s_rev_level
) > EXT3_MAX_SUPP_REV
) {
1294 ext3_msg(sb
, KERN_ERR
,
1295 "error: revision level too high, "
1296 "forcing read-only mode");
1301 if (!(sbi
->s_mount_state
& EXT3_VALID_FS
))
1302 ext3_msg(sb
, KERN_WARNING
,
1303 "warning: mounting unchecked fs, "
1304 "running e2fsck is recommended");
1305 else if ((sbi
->s_mount_state
& EXT3_ERROR_FS
))
1306 ext3_msg(sb
, KERN_WARNING
,
1307 "warning: mounting fs with errors, "
1308 "running e2fsck is recommended");
1309 else if ((__s16
) le16_to_cpu(es
->s_max_mnt_count
) >= 0 &&
1310 le16_to_cpu(es
->s_mnt_count
) >=
1311 (unsigned short) (__s16
) le16_to_cpu(es
->s_max_mnt_count
))
1312 ext3_msg(sb
, KERN_WARNING
,
1313 "warning: maximal mount count reached, "
1314 "running e2fsck is recommended");
1315 else if (le32_to_cpu(es
->s_checkinterval
) &&
1316 (le32_to_cpu(es
->s_lastcheck
) +
1317 le32_to_cpu(es
->s_checkinterval
) <= get_seconds()))
1318 ext3_msg(sb
, KERN_WARNING
,
1319 "warning: checktime reached, "
1320 "running e2fsck is recommended");
1322 /* @@@ We _will_ want to clear the valid bit if we find
1323 inconsistencies, to force a fsck at reboot. But for
1324 a plain journaled filesystem we can keep it set as
1325 valid forever! :) */
1326 es
->s_state
&= cpu_to_le16(~EXT3_VALID_FS
);
1328 if (!(__s16
) le16_to_cpu(es
->s_max_mnt_count
))
1329 es
->s_max_mnt_count
= cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT
);
1330 le16_add_cpu(&es
->s_mnt_count
, 1);
1331 es
->s_mtime
= cpu_to_le32(get_seconds());
1332 ext3_update_dynamic_rev(sb
);
1333 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
1335 ext3_commit_super(sb
, es
, 1);
1336 if (test_opt(sb
, DEBUG
))
1337 ext3_msg(sb
, KERN_INFO
, "[bs=%lu, gc=%lu, "
1338 "bpg=%lu, ipg=%lu, mo=%04lx]",
1340 sbi
->s_groups_count
,
1341 EXT3_BLOCKS_PER_GROUP(sb
),
1342 EXT3_INODES_PER_GROUP(sb
),
1345 if (EXT3_SB(sb
)->s_journal
->j_inode
== NULL
) {
1346 char b
[BDEVNAME_SIZE
];
1347 ext3_msg(sb
, KERN_INFO
, "using external journal on %s",
1348 bdevname(EXT3_SB(sb
)->s_journal
->j_dev
, b
));
1350 ext3_msg(sb
, KERN_INFO
, "using internal journal");
1355 /* Called at mount-time, super-block is locked */
1356 static int ext3_check_descriptors(struct super_block
*sb
)
1358 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1361 ext3_debug ("Checking group descriptors");
1363 for (i
= 0; i
< sbi
->s_groups_count
; i
++) {
1364 struct ext3_group_desc
*gdp
= ext3_get_group_desc(sb
, i
, NULL
);
1365 ext3_fsblk_t first_block
= ext3_group_first_block_no(sb
, i
);
1366 ext3_fsblk_t last_block
;
1368 if (i
== sbi
->s_groups_count
- 1)
1369 last_block
= le32_to_cpu(sbi
->s_es
->s_blocks_count
) - 1;
1371 last_block
= first_block
+
1372 (EXT3_BLOCKS_PER_GROUP(sb
) - 1);
1374 if (le32_to_cpu(gdp
->bg_block_bitmap
) < first_block
||
1375 le32_to_cpu(gdp
->bg_block_bitmap
) > last_block
)
1377 ext3_error (sb
, "ext3_check_descriptors",
1378 "Block bitmap for group %d"
1379 " not in group (block %lu)!",
1381 le32_to_cpu(gdp
->bg_block_bitmap
));
1384 if (le32_to_cpu(gdp
->bg_inode_bitmap
) < first_block
||
1385 le32_to_cpu(gdp
->bg_inode_bitmap
) > last_block
)
1387 ext3_error (sb
, "ext3_check_descriptors",
1388 "Inode bitmap for group %d"
1389 " not in group (block %lu)!",
1391 le32_to_cpu(gdp
->bg_inode_bitmap
));
1394 if (le32_to_cpu(gdp
->bg_inode_table
) < first_block
||
1395 le32_to_cpu(gdp
->bg_inode_table
) + sbi
->s_itb_per_group
- 1 >
1398 ext3_error (sb
, "ext3_check_descriptors",
1399 "Inode table for group %d"
1400 " not in group (block %lu)!",
1402 le32_to_cpu(gdp
->bg_inode_table
));
1407 sbi
->s_es
->s_free_blocks_count
=cpu_to_le32(ext3_count_free_blocks(sb
));
1408 sbi
->s_es
->s_free_inodes_count
=cpu_to_le32(ext3_count_free_inodes(sb
));
1413 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1414 * the superblock) which were deleted from all directories, but held open by
1415 * a process at the time of a crash. We walk the list and try to delete these
1416 * inodes at recovery time (only with a read-write filesystem).
1418 * In order to keep the orphan inode chain consistent during traversal (in
1419 * case of crash during recovery), we link each inode into the superblock
1420 * orphan list_head and handle it the same way as an inode deletion during
1421 * normal operation (which journals the operations for us).
1423 * We only do an iget() and an iput() on each inode, which is very safe if we
1424 * accidentally point at an in-use or already deleted inode. The worst that
1425 * can happen in this case is that we get a "bit already cleared" message from
1426 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1427 * e2fsck was run on this filesystem, and it must have already done the orphan
1428 * inode cleanup for us, so we can safely abort without any further action.
1430 static void ext3_orphan_cleanup (struct super_block
* sb
,
1431 struct ext3_super_block
* es
)
1433 unsigned int s_flags
= sb
->s_flags
;
1434 int nr_orphans
= 0, nr_truncates
= 0;
1438 if (!es
->s_last_orphan
) {
1439 jbd_debug(4, "no orphan inodes to clean up\n");
1443 if (bdev_read_only(sb
->s_bdev
)) {
1444 ext3_msg(sb
, KERN_ERR
, "error: write access "
1445 "unavailable, skipping orphan cleanup.");
1449 if (EXT3_SB(sb
)->s_mount_state
& EXT3_ERROR_FS
) {
1450 if (es
->s_last_orphan
)
1451 jbd_debug(1, "Errors on filesystem, "
1452 "clearing orphan list.\n");
1453 es
->s_last_orphan
= 0;
1454 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1458 if (s_flags
& MS_RDONLY
) {
1459 ext3_msg(sb
, KERN_INFO
, "orphan cleanup on readonly fs");
1460 sb
->s_flags
&= ~MS_RDONLY
;
1463 /* Needed for iput() to work correctly and not trash data */
1464 sb
->s_flags
|= MS_ACTIVE
;
1465 /* Turn on quotas so that they are updated correctly */
1466 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1467 if (EXT3_SB(sb
)->s_qf_names
[i
]) {
1468 int ret
= ext3_quota_on_mount(sb
, i
);
1470 ext3_msg(sb
, KERN_ERR
,
1471 "error: cannot turn on journaled "
1477 while (es
->s_last_orphan
) {
1478 struct inode
*inode
;
1480 inode
= ext3_orphan_get(sb
, le32_to_cpu(es
->s_last_orphan
));
1481 if (IS_ERR(inode
)) {
1482 es
->s_last_orphan
= 0;
1486 list_add(&EXT3_I(inode
)->i_orphan
, &EXT3_SB(sb
)->s_orphan
);
1488 if (inode
->i_nlink
) {
1490 "%s: truncating inode %lu to %Ld bytes\n",
1491 __func__
, inode
->i_ino
, inode
->i_size
);
1492 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1493 inode
->i_ino
, inode
->i_size
);
1494 ext3_truncate(inode
);
1498 "%s: deleting unreferenced inode %lu\n",
1499 __func__
, inode
->i_ino
);
1500 jbd_debug(2, "deleting unreferenced inode %lu\n",
1504 iput(inode
); /* The delete magic happens here! */
1507 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1510 ext3_msg(sb
, KERN_INFO
, "%d orphan inode%s deleted",
1511 PLURAL(nr_orphans
));
1513 ext3_msg(sb
, KERN_INFO
, "%d truncate%s cleaned up",
1514 PLURAL(nr_truncates
));
1516 /* Turn quotas off */
1517 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1518 if (sb_dqopt(sb
)->files
[i
])
1519 vfs_quota_off(sb
, i
, 0);
1522 sb
->s_flags
= s_flags
; /* Restore MS_RDONLY status */
1526 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1527 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1528 * We need to be 1 filesystem block less than the 2^32 sector limit.
1530 static loff_t
ext3_max_size(int bits
)
1532 loff_t res
= EXT3_NDIR_BLOCKS
;
1536 /* This is calculated to be the largest file size for a
1537 * dense, file such that the total number of
1538 * sectors in the file, including data and all indirect blocks,
1539 * does not exceed 2^32 -1
1540 * __u32 i_blocks representing the total number of
1541 * 512 bytes blocks of the file
1543 upper_limit
= (1LL << 32) - 1;
1545 /* total blocks in file system block size */
1546 upper_limit
>>= (bits
- 9);
1549 /* indirect blocks */
1551 /* double indirect blocks */
1552 meta_blocks
+= 1 + (1LL << (bits
-2));
1553 /* tripple indirect blocks */
1554 meta_blocks
+= 1 + (1LL << (bits
-2)) + (1LL << (2*(bits
-2)));
1556 upper_limit
-= meta_blocks
;
1557 upper_limit
<<= bits
;
1559 res
+= 1LL << (bits
-2);
1560 res
+= 1LL << (2*(bits
-2));
1561 res
+= 1LL << (3*(bits
-2));
1563 if (res
> upper_limit
)
1566 if (res
> MAX_LFS_FILESIZE
)
1567 res
= MAX_LFS_FILESIZE
;
1572 static ext3_fsblk_t
descriptor_loc(struct super_block
*sb
,
1573 ext3_fsblk_t logic_sb_block
,
1576 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1577 unsigned long bg
, first_meta_bg
;
1580 first_meta_bg
= le32_to_cpu(sbi
->s_es
->s_first_meta_bg
);
1582 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_META_BG
) ||
1584 return (logic_sb_block
+ nr
+ 1);
1585 bg
= sbi
->s_desc_per_block
* nr
;
1586 if (ext3_bg_has_super(sb
, bg
))
1588 return (has_super
+ ext3_group_first_block_no(sb
, bg
));
1592 static int ext3_fill_super (struct super_block
*sb
, void *data
, int silent
)
1594 struct buffer_head
* bh
;
1595 struct ext3_super_block
*es
= NULL
;
1596 struct ext3_sb_info
*sbi
;
1598 ext3_fsblk_t sb_block
= get_sb_block(&data
, sb
);
1599 ext3_fsblk_t logic_sb_block
;
1600 unsigned long offset
= 0;
1601 unsigned int journal_inum
= 0;
1602 unsigned long journal_devnum
= 0;
1603 unsigned long def_mount_opts
;
1614 sbi
= kzalloc(sizeof(*sbi
), GFP_KERNEL
);
1618 sbi
->s_blockgroup_lock
=
1619 kzalloc(sizeof(struct blockgroup_lock
), GFP_KERNEL
);
1620 if (!sbi
->s_blockgroup_lock
) {
1624 sb
->s_fs_info
= sbi
;
1625 sbi
->s_mount_opt
= 0;
1626 sbi
->s_resuid
= EXT3_DEF_RESUID
;
1627 sbi
->s_resgid
= EXT3_DEF_RESGID
;
1628 sbi
->s_sb_block
= sb_block
;
1632 blocksize
= sb_min_blocksize(sb
, EXT3_MIN_BLOCK_SIZE
);
1634 ext3_msg(sb
, KERN_ERR
, "error: unable to set blocksize");
1639 * The ext3 superblock will not be buffer aligned for other than 1kB
1640 * block sizes. We need to calculate the offset from buffer start.
1642 if (blocksize
!= EXT3_MIN_BLOCK_SIZE
) {
1643 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1644 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1646 logic_sb_block
= sb_block
;
1649 if (!(bh
= sb_bread(sb
, logic_sb_block
))) {
1650 ext3_msg(sb
, KERN_ERR
, "error: unable to read superblock");
1654 * Note: s_es must be initialized as soon as possible because
1655 * some ext3 macro-instructions depend on its value
1657 es
= (struct ext3_super_block
*) (((char *)bh
->b_data
) + offset
);
1659 sb
->s_magic
= le16_to_cpu(es
->s_magic
);
1660 if (sb
->s_magic
!= EXT3_SUPER_MAGIC
)
1663 /* Set defaults before we parse the mount options */
1664 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
1665 if (def_mount_opts
& EXT3_DEFM_DEBUG
)
1666 set_opt(sbi
->s_mount_opt
, DEBUG
);
1667 if (def_mount_opts
& EXT3_DEFM_BSDGROUPS
)
1668 set_opt(sbi
->s_mount_opt
, GRPID
);
1669 if (def_mount_opts
& EXT3_DEFM_UID16
)
1670 set_opt(sbi
->s_mount_opt
, NO_UID32
);
1671 #ifdef CONFIG_EXT3_FS_XATTR
1672 if (def_mount_opts
& EXT3_DEFM_XATTR_USER
)
1673 set_opt(sbi
->s_mount_opt
, XATTR_USER
);
1675 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1676 if (def_mount_opts
& EXT3_DEFM_ACL
)
1677 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
1679 if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_DATA
)
1680 set_opt(sbi
->s_mount_opt
, JOURNAL_DATA
);
1681 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_ORDERED
)
1682 set_opt(sbi
->s_mount_opt
, ORDERED_DATA
);
1683 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_WBACK
)
1684 set_opt(sbi
->s_mount_opt
, WRITEBACK_DATA
);
1686 if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_PANIC
)
1687 set_opt(sbi
->s_mount_opt
, ERRORS_PANIC
);
1688 else if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_CONTINUE
)
1689 set_opt(sbi
->s_mount_opt
, ERRORS_CONT
);
1691 set_opt(sbi
->s_mount_opt
, ERRORS_RO
);
1693 sbi
->s_resuid
= le16_to_cpu(es
->s_def_resuid
);
1694 sbi
->s_resgid
= le16_to_cpu(es
->s_def_resgid
);
1696 set_opt(sbi
->s_mount_opt
, RESERVATION
);
1698 if (!parse_options ((char *) data
, sb
, &journal_inum
, &journal_devnum
,
1702 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
1703 (test_opt(sb
, POSIX_ACL
) ? MS_POSIXACL
: 0);
1705 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
&&
1706 (EXT3_HAS_COMPAT_FEATURE(sb
, ~0U) ||
1707 EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~0U) ||
1708 EXT3_HAS_INCOMPAT_FEATURE(sb
, ~0U)))
1709 ext3_msg(sb
, KERN_WARNING
,
1710 "warning: feature flags set on rev 0 fs, "
1711 "running e2fsck is recommended");
1713 * Check feature flags regardless of the revision level, since we
1714 * previously didn't change the revision level when setting the flags,
1715 * so there is a chance incompat flags are set on a rev 0 filesystem.
1717 features
= EXT3_HAS_INCOMPAT_FEATURE(sb
, ~EXT3_FEATURE_INCOMPAT_SUPP
);
1719 ext3_msg(sb
, KERN_ERR
,
1720 "error: couldn't mount because of unsupported "
1721 "optional features (%x)", le32_to_cpu(features
));
1724 features
= EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~EXT3_FEATURE_RO_COMPAT_SUPP
);
1725 if (!(sb
->s_flags
& MS_RDONLY
) && features
) {
1726 ext3_msg(sb
, KERN_ERR
,
1727 "error: couldn't mount RDWR because of unsupported "
1728 "optional features (%x)", le32_to_cpu(features
));
1731 blocksize
= BLOCK_SIZE
<< le32_to_cpu(es
->s_log_block_size
);
1733 if (blocksize
< EXT3_MIN_BLOCK_SIZE
||
1734 blocksize
> EXT3_MAX_BLOCK_SIZE
) {
1735 ext3_msg(sb
, KERN_ERR
,
1736 "error: couldn't mount because of unsupported "
1737 "filesystem blocksize %d", blocksize
);
1741 hblock
= bdev_logical_block_size(sb
->s_bdev
);
1742 if (sb
->s_blocksize
!= blocksize
) {
1744 * Make sure the blocksize for the filesystem is larger
1745 * than the hardware sectorsize for the machine.
1747 if (blocksize
< hblock
) {
1748 ext3_msg(sb
, KERN_ERR
,
1749 "error: fsblocksize %d too small for "
1750 "hardware sectorsize %d", blocksize
, hblock
);
1755 if (!sb_set_blocksize(sb
, blocksize
)) {
1756 ext3_msg(sb
, KERN_ERR
,
1757 "error: bad blocksize %d", blocksize
);
1760 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1761 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1762 bh
= sb_bread(sb
, logic_sb_block
);
1764 ext3_msg(sb
, KERN_ERR
,
1765 "error: can't read superblock on 2nd try");
1768 es
= (struct ext3_super_block
*)(((char *)bh
->b_data
) + offset
);
1770 if (es
->s_magic
!= cpu_to_le16(EXT3_SUPER_MAGIC
)) {
1771 ext3_msg(sb
, KERN_ERR
,
1772 "error: magic mismatch");
1777 sb
->s_maxbytes
= ext3_max_size(sb
->s_blocksize_bits
);
1779 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
) {
1780 sbi
->s_inode_size
= EXT3_GOOD_OLD_INODE_SIZE
;
1781 sbi
->s_first_ino
= EXT3_GOOD_OLD_FIRST_INO
;
1783 sbi
->s_inode_size
= le16_to_cpu(es
->s_inode_size
);
1784 sbi
->s_first_ino
= le32_to_cpu(es
->s_first_ino
);
1785 if ((sbi
->s_inode_size
< EXT3_GOOD_OLD_INODE_SIZE
) ||
1786 (!is_power_of_2(sbi
->s_inode_size
)) ||
1787 (sbi
->s_inode_size
> blocksize
)) {
1788 ext3_msg(sb
, KERN_ERR
,
1789 "error: unsupported inode size: %d",
1794 sbi
->s_frag_size
= EXT3_MIN_FRAG_SIZE
<<
1795 le32_to_cpu(es
->s_log_frag_size
);
1796 if (blocksize
!= sbi
->s_frag_size
) {
1797 ext3_msg(sb
, KERN_ERR
,
1798 "error: fragsize %lu != blocksize %u (unsupported)",
1799 sbi
->s_frag_size
, blocksize
);
1802 sbi
->s_frags_per_block
= 1;
1803 sbi
->s_blocks_per_group
= le32_to_cpu(es
->s_blocks_per_group
);
1804 sbi
->s_frags_per_group
= le32_to_cpu(es
->s_frags_per_group
);
1805 sbi
->s_inodes_per_group
= le32_to_cpu(es
->s_inodes_per_group
);
1806 if (EXT3_INODE_SIZE(sb
) == 0 || EXT3_INODES_PER_GROUP(sb
) == 0)
1808 sbi
->s_inodes_per_block
= blocksize
/ EXT3_INODE_SIZE(sb
);
1809 if (sbi
->s_inodes_per_block
== 0)
1811 sbi
->s_itb_per_group
= sbi
->s_inodes_per_group
/
1812 sbi
->s_inodes_per_block
;
1813 sbi
->s_desc_per_block
= blocksize
/ sizeof(struct ext3_group_desc
);
1815 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
1816 sbi
->s_addr_per_block_bits
= ilog2(EXT3_ADDR_PER_BLOCK(sb
));
1817 sbi
->s_desc_per_block_bits
= ilog2(EXT3_DESC_PER_BLOCK(sb
));
1818 for (i
=0; i
< 4; i
++)
1819 sbi
->s_hash_seed
[i
] = le32_to_cpu(es
->s_hash_seed
[i
]);
1820 sbi
->s_def_hash_version
= es
->s_def_hash_version
;
1821 i
= le32_to_cpu(es
->s_flags
);
1822 if (i
& EXT2_FLAGS_UNSIGNED_HASH
)
1823 sbi
->s_hash_unsigned
= 3;
1824 else if ((i
& EXT2_FLAGS_SIGNED_HASH
) == 0) {
1825 #ifdef __CHAR_UNSIGNED__
1826 es
->s_flags
|= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH
);
1827 sbi
->s_hash_unsigned
= 3;
1829 es
->s_flags
|= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH
);
1833 if (sbi
->s_blocks_per_group
> blocksize
* 8) {
1834 ext3_msg(sb
, KERN_ERR
,
1835 "#blocks per group too big: %lu",
1836 sbi
->s_blocks_per_group
);
1839 if (sbi
->s_frags_per_group
> blocksize
* 8) {
1840 ext3_msg(sb
, KERN_ERR
,
1841 "error: #fragments per group too big: %lu",
1842 sbi
->s_frags_per_group
);
1845 if (sbi
->s_inodes_per_group
> blocksize
* 8) {
1846 ext3_msg(sb
, KERN_ERR
,
1847 "error: #inodes per group too big: %lu",
1848 sbi
->s_inodes_per_group
);
1852 if (le32_to_cpu(es
->s_blocks_count
) >
1853 (sector_t
)(~0ULL) >> (sb
->s_blocksize_bits
- 9)) {
1854 ext3_msg(sb
, KERN_ERR
,
1855 "error: filesystem is too large to mount safely");
1856 if (sizeof(sector_t
) < 8)
1857 ext3_msg(sb
, KERN_ERR
,
1858 "error: CONFIG_LBDAF not enabled");
1862 if (EXT3_BLOCKS_PER_GROUP(sb
) == 0)
1864 sbi
->s_groups_count
= ((le32_to_cpu(es
->s_blocks_count
) -
1865 le32_to_cpu(es
->s_first_data_block
) - 1)
1866 / EXT3_BLOCKS_PER_GROUP(sb
)) + 1;
1867 db_count
= (sbi
->s_groups_count
+ EXT3_DESC_PER_BLOCK(sb
) - 1) /
1868 EXT3_DESC_PER_BLOCK(sb
);
1869 sbi
->s_group_desc
= kmalloc(db_count
* sizeof (struct buffer_head
*),
1871 if (sbi
->s_group_desc
== NULL
) {
1872 ext3_msg(sb
, KERN_ERR
,
1873 "error: not enough memory");
1877 bgl_lock_init(sbi
->s_blockgroup_lock
);
1879 for (i
= 0; i
< db_count
; i
++) {
1880 block
= descriptor_loc(sb
, logic_sb_block
, i
);
1881 sbi
->s_group_desc
[i
] = sb_bread(sb
, block
);
1882 if (!sbi
->s_group_desc
[i
]) {
1883 ext3_msg(sb
, KERN_ERR
,
1884 "error: can't read group descriptor %d", i
);
1889 if (!ext3_check_descriptors (sb
)) {
1890 ext3_msg(sb
, KERN_ERR
,
1891 "error: group descriptors corrupted");
1894 sbi
->s_gdb_count
= db_count
;
1895 get_random_bytes(&sbi
->s_next_generation
, sizeof(u32
));
1896 spin_lock_init(&sbi
->s_next_gen_lock
);
1898 err
= percpu_counter_init(&sbi
->s_freeblocks_counter
,
1899 ext3_count_free_blocks(sb
));
1901 err
= percpu_counter_init(&sbi
->s_freeinodes_counter
,
1902 ext3_count_free_inodes(sb
));
1905 err
= percpu_counter_init(&sbi
->s_dirs_counter
,
1906 ext3_count_dirs(sb
));
1909 ext3_msg(sb
, KERN_ERR
, "error: insufficient memory");
1913 /* per fileystem reservation list head & lock */
1914 spin_lock_init(&sbi
->s_rsv_window_lock
);
1915 sbi
->s_rsv_window_root
= RB_ROOT
;
1916 /* Add a single, static dummy reservation to the start of the
1917 * reservation window list --- it gives us a placeholder for
1918 * append-at-start-of-list which makes the allocation logic
1919 * _much_ simpler. */
1920 sbi
->s_rsv_window_head
.rsv_start
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1921 sbi
->s_rsv_window_head
.rsv_end
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1922 sbi
->s_rsv_window_head
.rsv_alloc_hit
= 0;
1923 sbi
->s_rsv_window_head
.rsv_goal_size
= 0;
1924 ext3_rsv_window_add(sb
, &sbi
->s_rsv_window_head
);
1927 * set up enough so that it can read an inode
1929 sb
->s_op
= &ext3_sops
;
1930 sb
->s_export_op
= &ext3_export_ops
;
1931 sb
->s_xattr
= ext3_xattr_handlers
;
1933 sb
->s_qcop
= &ext3_qctl_operations
;
1934 sb
->dq_op
= &ext3_quota_operations
;
1936 INIT_LIST_HEAD(&sbi
->s_orphan
); /* unlinked but open files */
1937 mutex_init(&sbi
->s_orphan_lock
);
1938 mutex_init(&sbi
->s_resize_lock
);
1942 needs_recovery
= (es
->s_last_orphan
!= 0 ||
1943 EXT3_HAS_INCOMPAT_FEATURE(sb
,
1944 EXT3_FEATURE_INCOMPAT_RECOVER
));
1947 * The first inode we look at is the journal inode. Don't try
1948 * root first: it may be modified in the journal!
1950 if (!test_opt(sb
, NOLOAD
) &&
1951 EXT3_HAS_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
)) {
1952 if (ext3_load_journal(sb
, es
, journal_devnum
))
1954 } else if (journal_inum
) {
1955 if (ext3_create_journal(sb
, es
, journal_inum
))
1959 ext3_msg(sb
, KERN_ERR
,
1960 "error: no journal found. "
1961 "mounting ext3 over ext2?");
1965 /* We have now updated the journal if required, so we can
1966 * validate the data journaling mode. */
1967 switch (test_opt(sb
, DATA_FLAGS
)) {
1969 /* No mode set, assume a default based on the journal
1970 capabilities: ORDERED_DATA if the journal can
1971 cope, else JOURNAL_DATA */
1972 if (journal_check_available_features
1973 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
))
1974 set_opt(sbi
->s_mount_opt
, DEFAULT_DATA_MODE
);
1976 set_opt(sbi
->s_mount_opt
, JOURNAL_DATA
);
1979 case EXT3_MOUNT_ORDERED_DATA
:
1980 case EXT3_MOUNT_WRITEBACK_DATA
:
1981 if (!journal_check_available_features
1982 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
)) {
1983 ext3_msg(sb
, KERN_ERR
,
1984 "error: journal does not support "
1985 "requested data journaling mode");
1992 if (test_opt(sb
, NOBH
)) {
1993 if (!(test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_WRITEBACK_DATA
)) {
1994 ext3_msg(sb
, KERN_WARNING
,
1995 "warning: ignoring nobh option - "
1996 "it is supported only with writeback mode");
1997 clear_opt(sbi
->s_mount_opt
, NOBH
);
2001 * The journal_load will have done any necessary log recovery,
2002 * so we can safely mount the rest of the filesystem now.
2005 root
= ext3_iget(sb
, EXT3_ROOT_INO
);
2007 ext3_msg(sb
, KERN_ERR
, "error: get root inode failed");
2008 ret
= PTR_ERR(root
);
2011 if (!S_ISDIR(root
->i_mode
) || !root
->i_blocks
|| !root
->i_size
) {
2013 ext3_msg(sb
, KERN_ERR
, "error: corrupt root inode, run e2fsck");
2016 sb
->s_root
= d_alloc_root(root
);
2018 ext3_msg(sb
, KERN_ERR
, "error: get root dentry failed");
2024 ext3_setup_super (sb
, es
, sb
->s_flags
& MS_RDONLY
);
2026 EXT3_SB(sb
)->s_mount_state
|= EXT3_ORPHAN_FS
;
2027 ext3_orphan_cleanup(sb
, es
);
2028 EXT3_SB(sb
)->s_mount_state
&= ~EXT3_ORPHAN_FS
;
2030 ext3_msg(sb
, KERN_INFO
, "recovery complete");
2031 ext3_mark_recovery_complete(sb
, es
);
2032 ext3_msg(sb
, KERN_INFO
, "mounted filesystem with %s data mode",
2033 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_JOURNAL_DATA
? "journal":
2034 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_ORDERED_DATA
? "ordered":
2042 ext3_msg(sb
, KERN_INFO
,
2043 "error: can't find ext3 filesystem on dev %s.",
2048 journal_destroy(sbi
->s_journal
);
2050 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
2051 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
2052 percpu_counter_destroy(&sbi
->s_dirs_counter
);
2054 for (i
= 0; i
< db_count
; i
++)
2055 brelse(sbi
->s_group_desc
[i
]);
2056 kfree(sbi
->s_group_desc
);
2059 for (i
= 0; i
< MAXQUOTAS
; i
++)
2060 kfree(sbi
->s_qf_names
[i
]);
2062 ext3_blkdev_remove(sbi
);
2065 sb
->s_fs_info
= NULL
;
2066 kfree(sbi
->s_blockgroup_lock
);
2073 * Setup any per-fs journal parameters now. We'll do this both on
2074 * initial mount, once the journal has been initialised but before we've
2075 * done any recovery; and again on any subsequent remount.
2077 static void ext3_init_journal_params(struct super_block
*sb
, journal_t
*journal
)
2079 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2081 if (sbi
->s_commit_interval
)
2082 journal
->j_commit_interval
= sbi
->s_commit_interval
;
2083 /* We could also set up an ext3-specific default for the commit
2084 * interval here, but for now we'll just fall back to the jbd
2087 spin_lock(&journal
->j_state_lock
);
2088 if (test_opt(sb
, BARRIER
))
2089 journal
->j_flags
|= JFS_BARRIER
;
2091 journal
->j_flags
&= ~JFS_BARRIER
;
2092 if (test_opt(sb
, DATA_ERR_ABORT
))
2093 journal
->j_flags
|= JFS_ABORT_ON_SYNCDATA_ERR
;
2095 journal
->j_flags
&= ~JFS_ABORT_ON_SYNCDATA_ERR
;
2096 spin_unlock(&journal
->j_state_lock
);
2099 static journal_t
*ext3_get_journal(struct super_block
*sb
,
2100 unsigned int journal_inum
)
2102 struct inode
*journal_inode
;
2105 /* First, test for the existence of a valid inode on disk. Bad
2106 * things happen if we iget() an unused inode, as the subsequent
2107 * iput() will try to delete it. */
2109 journal_inode
= ext3_iget(sb
, journal_inum
);
2110 if (IS_ERR(journal_inode
)) {
2111 ext3_msg(sb
, KERN_ERR
, "error: no journal found");
2114 if (!journal_inode
->i_nlink
) {
2115 make_bad_inode(journal_inode
);
2116 iput(journal_inode
);
2117 ext3_msg(sb
, KERN_ERR
, "error: journal inode is deleted");
2121 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2122 journal_inode
, journal_inode
->i_size
);
2123 if (!S_ISREG(journal_inode
->i_mode
)) {
2124 ext3_msg(sb
, KERN_ERR
, "error: invalid journal inode");
2125 iput(journal_inode
);
2129 journal
= journal_init_inode(journal_inode
);
2131 ext3_msg(sb
, KERN_ERR
, "error: could not load journal inode");
2132 iput(journal_inode
);
2135 journal
->j_private
= sb
;
2136 ext3_init_journal_params(sb
, journal
);
2140 static journal_t
*ext3_get_dev_journal(struct super_block
*sb
,
2143 struct buffer_head
* bh
;
2147 int hblock
, blocksize
;
2148 ext3_fsblk_t sb_block
;
2149 unsigned long offset
;
2150 struct ext3_super_block
* es
;
2151 struct block_device
*bdev
;
2153 bdev
= ext3_blkdev_get(j_dev
, sb
);
2157 if (bd_claim(bdev
, sb
)) {
2158 ext3_msg(sb
, KERN_ERR
,
2159 "error: failed to claim external journal device");
2160 blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
);
2164 blocksize
= sb
->s_blocksize
;
2165 hblock
= bdev_logical_block_size(bdev
);
2166 if (blocksize
< hblock
) {
2167 ext3_msg(sb
, KERN_ERR
,
2168 "error: blocksize too small for journal device");
2172 sb_block
= EXT3_MIN_BLOCK_SIZE
/ blocksize
;
2173 offset
= EXT3_MIN_BLOCK_SIZE
% blocksize
;
2174 set_blocksize(bdev
, blocksize
);
2175 if (!(bh
= __bread(bdev
, sb_block
, blocksize
))) {
2176 ext3_msg(sb
, KERN_ERR
, "error: couldn't read superblock of "
2177 "external journal");
2181 es
= (struct ext3_super_block
*) (((char *)bh
->b_data
) + offset
);
2182 if ((le16_to_cpu(es
->s_magic
) != EXT3_SUPER_MAGIC
) ||
2183 !(le32_to_cpu(es
->s_feature_incompat
) &
2184 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV
)) {
2185 ext3_msg(sb
, KERN_ERR
, "error: external journal has "
2191 if (memcmp(EXT3_SB(sb
)->s_es
->s_journal_uuid
, es
->s_uuid
, 16)) {
2192 ext3_msg(sb
, KERN_ERR
, "error: journal UUID does not match");
2197 len
= le32_to_cpu(es
->s_blocks_count
);
2198 start
= sb_block
+ 1;
2199 brelse(bh
); /* we're done with the superblock */
2201 journal
= journal_init_dev(bdev
, sb
->s_bdev
,
2202 start
, len
, blocksize
);
2204 ext3_msg(sb
, KERN_ERR
,
2205 "error: failed to create device journal");
2208 journal
->j_private
= sb
;
2209 ll_rw_block(READ
, 1, &journal
->j_sb_buffer
);
2210 wait_on_buffer(journal
->j_sb_buffer
);
2211 if (!buffer_uptodate(journal
->j_sb_buffer
)) {
2212 ext3_msg(sb
, KERN_ERR
, "I/O error on journal device");
2215 if (be32_to_cpu(journal
->j_superblock
->s_nr_users
) != 1) {
2216 ext3_msg(sb
, KERN_ERR
,
2217 "error: external journal has more than one "
2218 "user (unsupported) - %d",
2219 be32_to_cpu(journal
->j_superblock
->s_nr_users
));
2222 EXT3_SB(sb
)->journal_bdev
= bdev
;
2223 ext3_init_journal_params(sb
, journal
);
2226 journal_destroy(journal
);
2228 ext3_blkdev_put(bdev
);
2232 static int ext3_load_journal(struct super_block
*sb
,
2233 struct ext3_super_block
*es
,
2234 unsigned long journal_devnum
)
2237 unsigned int journal_inum
= le32_to_cpu(es
->s_journal_inum
);
2240 int really_read_only
;
2242 if (journal_devnum
&&
2243 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2244 ext3_msg(sb
, KERN_INFO
, "external journal device major/minor "
2245 "numbers have changed");
2246 journal_dev
= new_decode_dev(journal_devnum
);
2248 journal_dev
= new_decode_dev(le32_to_cpu(es
->s_journal_dev
));
2250 really_read_only
= bdev_read_only(sb
->s_bdev
);
2253 * Are we loading a blank journal or performing recovery after a
2254 * crash? For recovery, we need to check in advance whether we
2255 * can get read-write access to the device.
2258 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
)) {
2259 if (sb
->s_flags
& MS_RDONLY
) {
2260 ext3_msg(sb
, KERN_INFO
,
2261 "recovery required on readonly filesystem");
2262 if (really_read_only
) {
2263 ext3_msg(sb
, KERN_ERR
, "error: write access "
2264 "unavailable, cannot proceed");
2267 ext3_msg(sb
, KERN_INFO
,
2268 "write access will be enabled during recovery");
2272 if (journal_inum
&& journal_dev
) {
2273 ext3_msg(sb
, KERN_ERR
, "error: filesystem has both journal "
2274 "and inode journals");
2279 if (!(journal
= ext3_get_journal(sb
, journal_inum
)))
2282 if (!(journal
= ext3_get_dev_journal(sb
, journal_dev
)))
2286 if (!really_read_only
&& test_opt(sb
, UPDATE_JOURNAL
)) {
2287 err
= journal_update_format(journal
);
2289 ext3_msg(sb
, KERN_ERR
, "error updating journal");
2290 journal_destroy(journal
);
2295 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
))
2296 err
= journal_wipe(journal
, !really_read_only
);
2298 err
= journal_load(journal
);
2301 ext3_msg(sb
, KERN_ERR
, "error loading journal");
2302 journal_destroy(journal
);
2306 EXT3_SB(sb
)->s_journal
= journal
;
2307 ext3_clear_journal_err(sb
, es
);
2309 if (journal_devnum
&&
2310 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2311 es
->s_journal_dev
= cpu_to_le32(journal_devnum
);
2313 /* Make sure we flush the recovery flag to disk. */
2314 ext3_commit_super(sb
, es
, 1);
2320 static int ext3_create_journal(struct super_block
*sb
,
2321 struct ext3_super_block
*es
,
2322 unsigned int journal_inum
)
2327 if (sb
->s_flags
& MS_RDONLY
) {
2328 ext3_msg(sb
, KERN_ERR
,
2329 "error: readonly filesystem when trying to "
2334 journal
= ext3_get_journal(sb
, journal_inum
);
2338 ext3_msg(sb
, KERN_INFO
, "creating new journal on inode %u",
2341 err
= journal_create(journal
);
2343 ext3_msg(sb
, KERN_ERR
, "error creating journal");
2344 journal_destroy(journal
);
2348 EXT3_SB(sb
)->s_journal
= journal
;
2350 ext3_update_dynamic_rev(sb
);
2351 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2352 EXT3_SET_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
);
2354 es
->s_journal_inum
= cpu_to_le32(journal_inum
);
2356 /* Make sure we flush the recovery flag to disk. */
2357 ext3_commit_super(sb
, es
, 1);
2362 static int ext3_commit_super(struct super_block
*sb
,
2363 struct ext3_super_block
*es
,
2366 struct buffer_head
*sbh
= EXT3_SB(sb
)->s_sbh
;
2372 * If the file system is mounted read-only, don't update the
2373 * superblock write time. This avoids updating the superblock
2374 * write time when we are mounting the root file system
2375 * read/only but we need to replay the journal; at that point,
2376 * for people who are east of GMT and who make their clock
2377 * tick in localtime for Windows bug-for-bug compatibility,
2378 * the clock is set in the future, and this will cause e2fsck
2379 * to complain and force a full file system check.
2381 if (!(sb
->s_flags
& MS_RDONLY
))
2382 es
->s_wtime
= cpu_to_le32(get_seconds());
2383 es
->s_free_blocks_count
= cpu_to_le32(ext3_count_free_blocks(sb
));
2384 es
->s_free_inodes_count
= cpu_to_le32(ext3_count_free_inodes(sb
));
2385 BUFFER_TRACE(sbh
, "marking dirty");
2386 mark_buffer_dirty(sbh
);
2388 error
= sync_dirty_buffer(sbh
);
2394 * Have we just finished recovery? If so, and if we are mounting (or
2395 * remounting) the filesystem readonly, then we will end up with a
2396 * consistent fs on disk. Record that fact.
2398 static void ext3_mark_recovery_complete(struct super_block
* sb
,
2399 struct ext3_super_block
* es
)
2401 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
2403 journal_lock_updates(journal
);
2404 if (journal_flush(journal
) < 0)
2407 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
) &&
2408 sb
->s_flags
& MS_RDONLY
) {
2409 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2410 ext3_commit_super(sb
, es
, 1);
2414 journal_unlock_updates(journal
);
2418 * If we are mounting (or read-write remounting) a filesystem whose journal
2419 * has recorded an error from a previous lifetime, move that error to the
2420 * main filesystem now.
2422 static void ext3_clear_journal_err(struct super_block
*sb
,
2423 struct ext3_super_block
*es
)
2429 journal
= EXT3_SB(sb
)->s_journal
;
2432 * Now check for any error status which may have been recorded in the
2433 * journal by a prior ext3_error() or ext3_abort()
2436 j_errno
= journal_errno(journal
);
2440 errstr
= ext3_decode_error(sb
, j_errno
, nbuf
);
2441 ext3_warning(sb
, __func__
, "Filesystem error recorded "
2442 "from previous mount: %s", errstr
);
2443 ext3_warning(sb
, __func__
, "Marking fs in need of "
2444 "filesystem check.");
2446 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
2447 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
2448 ext3_commit_super (sb
, es
, 1);
2450 journal_clear_err(journal
);
2455 * Force the running and committing transactions to commit,
2456 * and wait on the commit.
2458 int ext3_force_commit(struct super_block
*sb
)
2463 if (sb
->s_flags
& MS_RDONLY
)
2466 journal
= EXT3_SB(sb
)->s_journal
;
2467 ret
= ext3_journal_force_commit(journal
);
2471 static int ext3_sync_fs(struct super_block
*sb
, int wait
)
2475 if (journal_start_commit(EXT3_SB(sb
)->s_journal
, &target
)) {
2477 log_wait_commit(EXT3_SB(sb
)->s_journal
, target
);
2483 * LVM calls this function before a (read-only) snapshot is created. This
2484 * gives us a chance to flush the journal completely and mark the fs clean.
2486 static int ext3_freeze(struct super_block
*sb
)
2491 if (!(sb
->s_flags
& MS_RDONLY
)) {
2492 journal
= EXT3_SB(sb
)->s_journal
;
2494 /* Now we set up the journal barrier. */
2495 journal_lock_updates(journal
);
2498 * We don't want to clear needs_recovery flag when we failed
2499 * to flush the journal.
2501 error
= journal_flush(journal
);
2505 /* Journal blocked and flushed, clear needs_recovery flag. */
2506 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2507 error
= ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2514 journal_unlock_updates(journal
);
2519 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2520 * flag here, even though the filesystem is not technically dirty yet.
2522 static int ext3_unfreeze(struct super_block
*sb
)
2524 if (!(sb
->s_flags
& MS_RDONLY
)) {
2526 /* Reser the needs_recovery flag before the fs is unlocked. */
2527 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2528 ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2530 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2535 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
)
2537 struct ext3_super_block
* es
;
2538 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2539 ext3_fsblk_t n_blocks_count
= 0;
2540 unsigned long old_sb_flags
;
2541 struct ext3_mount_options old_opts
;
2549 /* Store the original options */
2551 old_sb_flags
= sb
->s_flags
;
2552 old_opts
.s_mount_opt
= sbi
->s_mount_opt
;
2553 old_opts
.s_resuid
= sbi
->s_resuid
;
2554 old_opts
.s_resgid
= sbi
->s_resgid
;
2555 old_opts
.s_commit_interval
= sbi
->s_commit_interval
;
2557 old_opts
.s_jquota_fmt
= sbi
->s_jquota_fmt
;
2558 for (i
= 0; i
< MAXQUOTAS
; i
++)
2559 old_opts
.s_qf_names
[i
] = sbi
->s_qf_names
[i
];
2563 * Allow the "check" option to be passed as a remount option.
2565 if (!parse_options(data
, sb
, NULL
, NULL
, &n_blocks_count
, 1)) {
2570 if (test_opt(sb
, ABORT
))
2571 ext3_abort(sb
, __func__
, "Abort forced by user");
2573 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
2574 (test_opt(sb
, POSIX_ACL
) ? MS_POSIXACL
: 0);
2578 ext3_init_journal_params(sb
, sbi
->s_journal
);
2580 if ((*flags
& MS_RDONLY
) != (sb
->s_flags
& MS_RDONLY
) ||
2581 n_blocks_count
> le32_to_cpu(es
->s_blocks_count
)) {
2582 if (test_opt(sb
, ABORT
)) {
2587 if (*flags
& MS_RDONLY
) {
2589 * First of all, the unconditional stuff we have to do
2590 * to disable replay of the journal when we next remount
2592 sb
->s_flags
|= MS_RDONLY
;
2595 * OK, test if we are remounting a valid rw partition
2596 * readonly, and if so set the rdonly flag and then
2597 * mark the partition as valid again.
2599 if (!(es
->s_state
& cpu_to_le16(EXT3_VALID_FS
)) &&
2600 (sbi
->s_mount_state
& EXT3_VALID_FS
))
2601 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
2603 ext3_mark_recovery_complete(sb
, es
);
2606 if ((ret
= EXT3_HAS_RO_COMPAT_FEATURE(sb
,
2607 ~EXT3_FEATURE_RO_COMPAT_SUPP
))) {
2608 ext3_msg(sb
, KERN_WARNING
,
2609 "warning: couldn't remount RDWR "
2610 "because of unsupported optional "
2611 "features (%x)", le32_to_cpu(ret
));
2617 * If we have an unprocessed orphan list hanging
2618 * around from a previously readonly bdev mount,
2619 * require a full umount/remount for now.
2621 if (es
->s_last_orphan
) {
2622 ext3_msg(sb
, KERN_WARNING
, "warning: couldn't "
2623 "remount RDWR because of unprocessed "
2624 "orphan inode list. Please "
2625 "umount/remount instead.");
2631 * Mounting a RDONLY partition read-write, so reread
2632 * and store the current valid flag. (It may have
2633 * been changed by e2fsck since we originally mounted
2636 ext3_clear_journal_err(sb
, es
);
2637 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
2638 if ((err
= ext3_group_extend(sb
, es
, n_blocks_count
)))
2640 if (!ext3_setup_super (sb
, es
, 0))
2641 sb
->s_flags
&= ~MS_RDONLY
;
2645 /* Release old quota file names */
2646 for (i
= 0; i
< MAXQUOTAS
; i
++)
2647 if (old_opts
.s_qf_names
[i
] &&
2648 old_opts
.s_qf_names
[i
] != sbi
->s_qf_names
[i
])
2649 kfree(old_opts
.s_qf_names
[i
]);
2655 sb
->s_flags
= old_sb_flags
;
2656 sbi
->s_mount_opt
= old_opts
.s_mount_opt
;
2657 sbi
->s_resuid
= old_opts
.s_resuid
;
2658 sbi
->s_resgid
= old_opts
.s_resgid
;
2659 sbi
->s_commit_interval
= old_opts
.s_commit_interval
;
2661 sbi
->s_jquota_fmt
= old_opts
.s_jquota_fmt
;
2662 for (i
= 0; i
< MAXQUOTAS
; i
++) {
2663 if (sbi
->s_qf_names
[i
] &&
2664 old_opts
.s_qf_names
[i
] != sbi
->s_qf_names
[i
])
2665 kfree(sbi
->s_qf_names
[i
]);
2666 sbi
->s_qf_names
[i
] = old_opts
.s_qf_names
[i
];
2674 static int ext3_statfs (struct dentry
* dentry
, struct kstatfs
* buf
)
2676 struct super_block
*sb
= dentry
->d_sb
;
2677 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2678 struct ext3_super_block
*es
= sbi
->s_es
;
2681 if (test_opt(sb
, MINIX_DF
)) {
2682 sbi
->s_overhead_last
= 0;
2683 } else if (sbi
->s_blocks_last
!= le32_to_cpu(es
->s_blocks_count
)) {
2684 unsigned long ngroups
= sbi
->s_groups_count
, i
;
2685 ext3_fsblk_t overhead
= 0;
2689 * Compute the overhead (FS structures). This is constant
2690 * for a given filesystem unless the number of block groups
2691 * changes so we cache the previous value until it does.
2695 * All of the blocks before first_data_block are
2698 overhead
= le32_to_cpu(es
->s_first_data_block
);
2701 * Add the overhead attributed to the superblock and
2702 * block group descriptors. If the sparse superblocks
2703 * feature is turned on, then not all groups have this.
2705 for (i
= 0; i
< ngroups
; i
++) {
2706 overhead
+= ext3_bg_has_super(sb
, i
) +
2707 ext3_bg_num_gdb(sb
, i
);
2712 * Every block group has an inode bitmap, a block
2713 * bitmap, and an inode table.
2715 overhead
+= ngroups
* (2 + sbi
->s_itb_per_group
);
2716 sbi
->s_overhead_last
= overhead
;
2718 sbi
->s_blocks_last
= le32_to_cpu(es
->s_blocks_count
);
2721 buf
->f_type
= EXT3_SUPER_MAGIC
;
2722 buf
->f_bsize
= sb
->s_blocksize
;
2723 buf
->f_blocks
= le32_to_cpu(es
->s_blocks_count
) - sbi
->s_overhead_last
;
2724 buf
->f_bfree
= percpu_counter_sum_positive(&sbi
->s_freeblocks_counter
);
2725 buf
->f_bavail
= buf
->f_bfree
- le32_to_cpu(es
->s_r_blocks_count
);
2726 if (buf
->f_bfree
< le32_to_cpu(es
->s_r_blocks_count
))
2728 buf
->f_files
= le32_to_cpu(es
->s_inodes_count
);
2729 buf
->f_ffree
= percpu_counter_sum_positive(&sbi
->s_freeinodes_counter
);
2730 buf
->f_namelen
= EXT3_NAME_LEN
;
2731 fsid
= le64_to_cpup((void *)es
->s_uuid
) ^
2732 le64_to_cpup((void *)es
->s_uuid
+ sizeof(u64
));
2733 buf
->f_fsid
.val
[0] = fsid
& 0xFFFFFFFFUL
;
2734 buf
->f_fsid
.val
[1] = (fsid
>> 32) & 0xFFFFFFFFUL
;
2738 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2739 * is locked for write. Otherwise the are possible deadlocks:
2740 * Process 1 Process 2
2741 * ext3_create() quota_sync()
2742 * journal_start() write_dquot()
2743 * vfs_dq_init() down(dqio_mutex)
2744 * down(dqio_mutex) journal_start()
2750 static inline struct inode
*dquot_to_inode(struct dquot
*dquot
)
2752 return sb_dqopt(dquot
->dq_sb
)->files
[dquot
->dq_type
];
2755 static int ext3_write_dquot(struct dquot
*dquot
)
2759 struct inode
*inode
;
2761 inode
= dquot_to_inode(dquot
);
2762 handle
= ext3_journal_start(inode
,
2763 EXT3_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
2765 return PTR_ERR(handle
);
2766 ret
= dquot_commit(dquot
);
2767 err
= ext3_journal_stop(handle
);
2773 static int ext3_acquire_dquot(struct dquot
*dquot
)
2778 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2779 EXT3_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
2781 return PTR_ERR(handle
);
2782 ret
= dquot_acquire(dquot
);
2783 err
= ext3_journal_stop(handle
);
2789 static int ext3_release_dquot(struct dquot
*dquot
)
2794 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2795 EXT3_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
2796 if (IS_ERR(handle
)) {
2797 /* Release dquot anyway to avoid endless cycle in dqput() */
2798 dquot_release(dquot
);
2799 return PTR_ERR(handle
);
2801 ret
= dquot_release(dquot
);
2802 err
= ext3_journal_stop(handle
);
2808 static int ext3_mark_dquot_dirty(struct dquot
*dquot
)
2810 /* Are we journaling quotas? */
2811 if (EXT3_SB(dquot
->dq_sb
)->s_qf_names
[USRQUOTA
] ||
2812 EXT3_SB(dquot
->dq_sb
)->s_qf_names
[GRPQUOTA
]) {
2813 dquot_mark_dquot_dirty(dquot
);
2814 return ext3_write_dquot(dquot
);
2816 return dquot_mark_dquot_dirty(dquot
);
2820 static int ext3_write_info(struct super_block
*sb
, int type
)
2825 /* Data block + inode block */
2826 handle
= ext3_journal_start(sb
->s_root
->d_inode
, 2);
2828 return PTR_ERR(handle
);
2829 ret
= dquot_commit_info(sb
, type
);
2830 err
= ext3_journal_stop(handle
);
2837 * Turn on quotas during mount time - we need to find
2838 * the quota file and such...
2840 static int ext3_quota_on_mount(struct super_block
*sb
, int type
)
2842 return vfs_quota_on_mount(sb
, EXT3_SB(sb
)->s_qf_names
[type
],
2843 EXT3_SB(sb
)->s_jquota_fmt
, type
);
2847 * Standard function to be called on quota_on
2849 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
2850 char *name
, int remount
)
2855 if (!test_opt(sb
, QUOTA
))
2857 /* When remounting, no checks are needed and in fact, name is NULL */
2859 return vfs_quota_on(sb
, type
, format_id
, name
, remount
);
2861 err
= kern_path(name
, LOOKUP_FOLLOW
, &path
);
2865 /* Quotafile not on the same filesystem? */
2866 if (path
.mnt
->mnt_sb
!= sb
) {
2870 /* Journaling quota? */
2871 if (EXT3_SB(sb
)->s_qf_names
[type
]) {
2872 /* Quotafile not of fs root? */
2873 if (path
.dentry
->d_parent
!= sb
->s_root
)
2874 ext3_msg(sb
, KERN_WARNING
,
2875 "warning: Quota file not on filesystem root. "
2876 "Journaled quota will not work.");
2880 * When we journal data on quota file, we have to flush journal to see
2881 * all updates to the file when we bypass pagecache...
2883 if (ext3_should_journal_data(path
.dentry
->d_inode
)) {
2885 * We don't need to lock updates but journal_flush() could
2886 * otherwise be livelocked...
2888 journal_lock_updates(EXT3_SB(sb
)->s_journal
);
2889 err
= journal_flush(EXT3_SB(sb
)->s_journal
);
2890 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2897 err
= vfs_quota_on_path(sb
, type
, format_id
, &path
);
2902 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2903 * acquiring the locks... As quota files are never truncated and quota code
2904 * itself serializes the operations (and noone else should touch the files)
2905 * we don't have to be afraid of races */
2906 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
2907 size_t len
, loff_t off
)
2909 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2910 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2912 int offset
= off
& (sb
->s_blocksize
- 1);
2915 struct buffer_head
*bh
;
2916 loff_t i_size
= i_size_read(inode
);
2920 if (off
+len
> i_size
)
2923 while (toread
> 0) {
2924 tocopy
= sb
->s_blocksize
- offset
< toread
?
2925 sb
->s_blocksize
- offset
: toread
;
2926 bh
= ext3_bread(NULL
, inode
, blk
, 0, &err
);
2929 if (!bh
) /* A hole? */
2930 memset(data
, 0, tocopy
);
2932 memcpy(data
, bh
->b_data
+offset
, tocopy
);
2942 /* Write to quotafile (we know the transaction is already started and has
2943 * enough credits) */
2944 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
2945 const char *data
, size_t len
, loff_t off
)
2947 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2948 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2950 int offset
= off
& (sb
->s_blocksize
- 1);
2952 int journal_quota
= EXT3_SB(sb
)->s_qf_names
[type
] != NULL
;
2953 size_t towrite
= len
;
2954 struct buffer_head
*bh
;
2955 handle_t
*handle
= journal_current_handle();
2958 ext3_msg(sb
, KERN_WARNING
,
2959 "warning: quota write (off=%llu, len=%llu)"
2960 " cancelled because transaction is not started.",
2961 (unsigned long long)off
, (unsigned long long)len
);
2964 mutex_lock_nested(&inode
->i_mutex
, I_MUTEX_QUOTA
);
2965 while (towrite
> 0) {
2966 tocopy
= sb
->s_blocksize
- offset
< towrite
?
2967 sb
->s_blocksize
- offset
: towrite
;
2968 bh
= ext3_bread(handle
, inode
, blk
, 1, &err
);
2971 if (journal_quota
) {
2972 err
= ext3_journal_get_write_access(handle
, bh
);
2979 memcpy(bh
->b_data
+offset
, data
, tocopy
);
2980 flush_dcache_page(bh
->b_page
);
2983 err
= ext3_journal_dirty_metadata(handle
, bh
);
2985 /* Always do at least ordered writes for quotas */
2986 err
= ext3_journal_dirty_data(handle
, bh
);
2987 mark_buffer_dirty(bh
);
2998 if (len
== towrite
) {
2999 mutex_unlock(&inode
->i_mutex
);
3002 if (inode
->i_size
< off
+len
-towrite
) {
3003 i_size_write(inode
, off
+len
-towrite
);
3004 EXT3_I(inode
)->i_disksize
= inode
->i_size
;
3007 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
3008 ext3_mark_inode_dirty(handle
, inode
);
3009 mutex_unlock(&inode
->i_mutex
);
3010 return len
- towrite
;
3015 static int ext3_get_sb(struct file_system_type
*fs_type
,
3016 int flags
, const char *dev_name
, void *data
, struct vfsmount
*mnt
)
3018 return get_sb_bdev(fs_type
, flags
, dev_name
, data
, ext3_fill_super
, mnt
);
3021 static struct file_system_type ext3_fs_type
= {
3022 .owner
= THIS_MODULE
,
3024 .get_sb
= ext3_get_sb
,
3025 .kill_sb
= kill_block_super
,
3026 .fs_flags
= FS_REQUIRES_DEV
,
3029 static int __init
init_ext3_fs(void)
3031 int err
= init_ext3_xattr();
3034 err
= init_inodecache();
3037 err
= register_filesystem(&ext3_fs_type
);
3042 destroy_inodecache();
3048 static void __exit
exit_ext3_fs(void)
3050 unregister_filesystem(&ext3_fs_type
);
3051 destroy_inodecache();
3055 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3056 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3057 MODULE_LICENSE("GPL");
3058 module_init(init_ext3_fs
)
3059 module_exit(exit_ext3_fs
)