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
"%s: aborting transaction: %s in %s\n",
139 caller
, errstr
, err_fn
);
141 journal_abort_handle(handle
);
144 /* Deal with the reporting of failure conditions on a filesystem such as
145 * inconsistencies detected or read IO failures.
147 * On ext2, we can store the error state of the filesystem in the
148 * superblock. That is not possible on ext3, because we may have other
149 * write ordering constraints on the superblock which prevent us from
150 * writing it out straight away; and given that the journal is about to
151 * be aborted, we can't rely on the current, or future, transactions to
152 * write out the superblock safely.
154 * We'll just use the journal_abort() error code to record an error in
155 * the journal instead. On recovery, the journal will compain about
156 * that error until we've noted it down and cleared it.
159 static void ext3_handle_error(struct super_block
*sb
)
161 struct ext3_super_block
*es
= EXT3_SB(sb
)->s_es
;
163 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
164 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
166 if (sb
->s_flags
& MS_RDONLY
)
169 if (!test_opt (sb
, ERRORS_CONT
)) {
170 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
172 EXT3_SB(sb
)->s_mount_opt
|= EXT3_MOUNT_ABORT
;
174 journal_abort(journal
, -EIO
);
176 if (test_opt (sb
, ERRORS_RO
)) {
177 printk (KERN_CRIT
"Remounting filesystem read-only\n");
178 sb
->s_flags
|= MS_RDONLY
;
180 ext3_commit_super(sb
, es
, 1);
181 if (test_opt(sb
, ERRORS_PANIC
))
182 panic("EXT3-fs (device %s): panic forced after error\n",
186 void ext3_error (struct super_block
* sb
, const char * function
,
187 const char * fmt
, ...)
192 printk(KERN_CRIT
"EXT3-fs error (device %s): %s: ",sb
->s_id
, function
);
197 ext3_handle_error(sb
);
200 static const char *ext3_decode_error(struct super_block
* sb
, int errno
,
207 errstr
= "IO failure";
210 errstr
= "Out of memory";
213 if (!sb
|| EXT3_SB(sb
)->s_journal
->j_flags
& JFS_ABORT
)
214 errstr
= "Journal has aborted";
216 errstr
= "Readonly filesystem";
219 /* If the caller passed in an extra buffer for unknown
220 * errors, textualise them now. Else we just return
223 /* Check for truncated error codes... */
224 if (snprintf(nbuf
, 16, "error %d", -errno
) >= 0)
233 /* __ext3_std_error decodes expected errors from journaling functions
234 * automatically and invokes the appropriate error response. */
236 void __ext3_std_error (struct super_block
* sb
, const char * function
,
242 /* Special case: if the error is EROFS, and we're not already
243 * inside a transaction, then there's really no point in logging
245 if (errno
== -EROFS
&& journal_current_handle() == NULL
&&
246 (sb
->s_flags
& MS_RDONLY
))
249 errstr
= ext3_decode_error(sb
, errno
, nbuf
);
250 printk (KERN_CRIT
"EXT3-fs error (device %s) in %s: %s\n",
251 sb
->s_id
, function
, errstr
);
253 ext3_handle_error(sb
);
257 * ext3_abort is a much stronger failure handler than ext3_error. The
258 * abort function may be used to deal with unrecoverable failures such
259 * as journal IO errors or ENOMEM at a critical moment in log management.
261 * We unconditionally force the filesystem into an ABORT|READONLY state,
262 * unless the error response on the fs has been set to panic in which
263 * case we take the easy way out and panic immediately.
266 void ext3_abort (struct super_block
* sb
, const char * function
,
267 const char * fmt
, ...)
271 printk (KERN_CRIT
"ext3_abort called.\n");
274 printk(KERN_CRIT
"EXT3-fs error (device %s): %s: ",sb
->s_id
, function
);
279 if (test_opt(sb
, ERRORS_PANIC
))
280 panic("EXT3-fs panic from previous error\n");
282 if (sb
->s_flags
& MS_RDONLY
)
285 printk(KERN_CRIT
"Remounting filesystem read-only\n");
286 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
287 sb
->s_flags
|= MS_RDONLY
;
288 EXT3_SB(sb
)->s_mount_opt
|= EXT3_MOUNT_ABORT
;
289 if (EXT3_SB(sb
)->s_journal
)
290 journal_abort(EXT3_SB(sb
)->s_journal
, -EIO
);
293 void ext3_warning (struct super_block
* sb
, const char * function
,
294 const char * fmt
, ...)
299 printk(KERN_WARNING
"EXT3-fs warning (device %s): %s: ",
306 void ext3_update_dynamic_rev(struct super_block
*sb
)
308 struct ext3_super_block
*es
= EXT3_SB(sb
)->s_es
;
310 if (le32_to_cpu(es
->s_rev_level
) > EXT3_GOOD_OLD_REV
)
313 ext3_warning(sb
, __func__
,
314 "updating to rev %d because of new feature flag, "
315 "running e2fsck is recommended",
318 es
->s_first_ino
= cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO
);
319 es
->s_inode_size
= cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE
);
320 es
->s_rev_level
= cpu_to_le32(EXT3_DYNAMIC_REV
);
321 /* leave es->s_feature_*compat flags alone */
322 /* es->s_uuid will be set by e2fsck if empty */
325 * The rest of the superblock fields should be zero, and if not it
326 * means they are likely already in use, so leave them alone. We
327 * can leave it up to e2fsck to clean up any inconsistencies there.
332 * Open the external journal device
334 static struct block_device
*ext3_blkdev_get(dev_t dev
)
336 struct block_device
*bdev
;
337 char b
[BDEVNAME_SIZE
];
339 bdev
= open_by_devnum(dev
, FMODE_READ
|FMODE_WRITE
);
345 printk(KERN_ERR
"EXT3: failed to open journal device %s: %ld\n",
346 __bdevname(dev
, b
), PTR_ERR(bdev
));
351 * Release the journal device
353 static int ext3_blkdev_put(struct block_device
*bdev
)
356 return blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
);
359 static int ext3_blkdev_remove(struct ext3_sb_info
*sbi
)
361 struct block_device
*bdev
;
364 bdev
= sbi
->journal_bdev
;
366 ret
= ext3_blkdev_put(bdev
);
367 sbi
->journal_bdev
= NULL
;
372 static inline struct inode
*orphan_list_entry(struct list_head
*l
)
374 return &list_entry(l
, struct ext3_inode_info
, i_orphan
)->vfs_inode
;
377 static void dump_orphan_list(struct super_block
*sb
, struct ext3_sb_info
*sbi
)
381 printk(KERN_ERR
"sb orphan head is %d\n",
382 le32_to_cpu(sbi
->s_es
->s_last_orphan
));
384 printk(KERN_ERR
"sb_info orphan list:\n");
385 list_for_each(l
, &sbi
->s_orphan
) {
386 struct inode
*inode
= orphan_list_entry(l
);
388 "inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
389 inode
->i_sb
->s_id
, inode
->i_ino
, inode
,
390 inode
->i_mode
, inode
->i_nlink
,
395 static void ext3_put_super (struct super_block
* sb
)
397 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
398 struct ext3_super_block
*es
= sbi
->s_es
;
403 ext3_xattr_put_super(sb
);
404 err
= journal_destroy(sbi
->s_journal
);
405 sbi
->s_journal
= NULL
;
407 ext3_abort(sb
, __func__
, "Couldn't clean up the journal");
409 if (!(sb
->s_flags
& MS_RDONLY
)) {
410 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
411 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
412 BUFFER_TRACE(sbi
->s_sbh
, "marking dirty");
413 mark_buffer_dirty(sbi
->s_sbh
);
414 ext3_commit_super(sb
, es
, 1);
417 for (i
= 0; i
< sbi
->s_gdb_count
; i
++)
418 brelse(sbi
->s_group_desc
[i
]);
419 kfree(sbi
->s_group_desc
);
420 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
421 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
422 percpu_counter_destroy(&sbi
->s_dirs_counter
);
425 for (i
= 0; i
< MAXQUOTAS
; i
++)
426 kfree(sbi
->s_qf_names
[i
]);
429 /* Debugging code just in case the in-memory inode orphan list
430 * isn't empty. The on-disk one can be non-empty if we've
431 * detected an error and taken the fs readonly, but the
432 * in-memory list had better be clean by this point. */
433 if (!list_empty(&sbi
->s_orphan
))
434 dump_orphan_list(sb
, sbi
);
435 J_ASSERT(list_empty(&sbi
->s_orphan
));
437 invalidate_bdev(sb
->s_bdev
);
438 if (sbi
->journal_bdev
&& sbi
->journal_bdev
!= sb
->s_bdev
) {
440 * Invalidate the journal device's buffers. We don't want them
441 * floating about in memory - the physical journal device may
442 * hotswapped, and it breaks the `ro-after' testing code.
444 sync_blockdev(sbi
->journal_bdev
);
445 invalidate_bdev(sbi
->journal_bdev
);
446 ext3_blkdev_remove(sbi
);
448 sb
->s_fs_info
= NULL
;
449 kfree(sbi
->s_blockgroup_lock
);
455 static struct kmem_cache
*ext3_inode_cachep
;
458 * Called inside transaction, so use GFP_NOFS
460 static struct inode
*ext3_alloc_inode(struct super_block
*sb
)
462 struct ext3_inode_info
*ei
;
464 ei
= kmem_cache_alloc(ext3_inode_cachep
, GFP_NOFS
);
467 ei
->i_block_alloc_info
= NULL
;
468 ei
->vfs_inode
.i_version
= 1;
469 atomic_set(&ei
->i_datasync_tid
, 0);
470 atomic_set(&ei
->i_sync_tid
, 0);
471 return &ei
->vfs_inode
;
474 static void ext3_destroy_inode(struct inode
*inode
)
476 if (!list_empty(&(EXT3_I(inode
)->i_orphan
))) {
477 printk("EXT3 Inode %p: orphan list check failed!\n",
479 print_hex_dump(KERN_INFO
, "", DUMP_PREFIX_ADDRESS
, 16, 4,
480 EXT3_I(inode
), sizeof(struct ext3_inode_info
),
484 kmem_cache_free(ext3_inode_cachep
, EXT3_I(inode
));
487 static void init_once(void *foo
)
489 struct ext3_inode_info
*ei
= (struct ext3_inode_info
*) foo
;
491 INIT_LIST_HEAD(&ei
->i_orphan
);
492 #ifdef CONFIG_EXT3_FS_XATTR
493 init_rwsem(&ei
->xattr_sem
);
495 mutex_init(&ei
->truncate_mutex
);
496 inode_init_once(&ei
->vfs_inode
);
499 static int init_inodecache(void)
501 ext3_inode_cachep
= kmem_cache_create("ext3_inode_cache",
502 sizeof(struct ext3_inode_info
),
503 0, (SLAB_RECLAIM_ACCOUNT
|
506 if (ext3_inode_cachep
== NULL
)
511 static void destroy_inodecache(void)
513 kmem_cache_destroy(ext3_inode_cachep
);
516 static void ext3_clear_inode(struct inode
*inode
)
518 struct ext3_block_alloc_info
*rsv
= EXT3_I(inode
)->i_block_alloc_info
;
519 ext3_discard_reservation(inode
);
520 EXT3_I(inode
)->i_block_alloc_info
= NULL
;
525 static inline void ext3_show_quota_options(struct seq_file
*seq
, struct super_block
*sb
)
527 #if defined(CONFIG_QUOTA)
528 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
530 if (sbi
->s_jquota_fmt
)
531 seq_printf(seq
, ",jqfmt=%s",
532 (sbi
->s_jquota_fmt
== QFMT_VFS_OLD
) ? "vfsold": "vfsv0");
534 if (sbi
->s_qf_names
[USRQUOTA
])
535 seq_printf(seq
, ",usrjquota=%s", sbi
->s_qf_names
[USRQUOTA
]);
537 if (sbi
->s_qf_names
[GRPQUOTA
])
538 seq_printf(seq
, ",grpjquota=%s", sbi
->s_qf_names
[GRPQUOTA
]);
540 if (sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
)
541 seq_puts(seq
, ",usrquota");
543 if (sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
)
544 seq_puts(seq
, ",grpquota");
548 static char *data_mode_string(unsigned long mode
)
551 case EXT3_MOUNT_JOURNAL_DATA
:
553 case EXT3_MOUNT_ORDERED_DATA
:
555 case EXT3_MOUNT_WRITEBACK_DATA
:
563 * - it's set to a non-default value OR
564 * - if the per-sb default is different from the global default
566 static int ext3_show_options(struct seq_file
*seq
, struct vfsmount
*vfs
)
568 struct super_block
*sb
= vfs
->mnt_sb
;
569 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
570 struct ext3_super_block
*es
= sbi
->s_es
;
571 unsigned long def_mount_opts
;
573 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
575 if (sbi
->s_sb_block
!= 1)
576 seq_printf(seq
, ",sb=%lu", sbi
->s_sb_block
);
577 if (test_opt(sb
, MINIX_DF
))
578 seq_puts(seq
, ",minixdf");
579 if (test_opt(sb
, GRPID
))
580 seq_puts(seq
, ",grpid");
581 if (!test_opt(sb
, GRPID
) && (def_mount_opts
& EXT3_DEFM_BSDGROUPS
))
582 seq_puts(seq
, ",nogrpid");
583 if (sbi
->s_resuid
!= EXT3_DEF_RESUID
||
584 le16_to_cpu(es
->s_def_resuid
) != EXT3_DEF_RESUID
) {
585 seq_printf(seq
, ",resuid=%u", sbi
->s_resuid
);
587 if (sbi
->s_resgid
!= EXT3_DEF_RESGID
||
588 le16_to_cpu(es
->s_def_resgid
) != EXT3_DEF_RESGID
) {
589 seq_printf(seq
, ",resgid=%u", sbi
->s_resgid
);
591 if (test_opt(sb
, ERRORS_RO
)) {
592 int def_errors
= le16_to_cpu(es
->s_errors
);
594 if (def_errors
== EXT3_ERRORS_PANIC
||
595 def_errors
== EXT3_ERRORS_CONTINUE
) {
596 seq_puts(seq
, ",errors=remount-ro");
599 if (test_opt(sb
, ERRORS_CONT
))
600 seq_puts(seq
, ",errors=continue");
601 if (test_opt(sb
, ERRORS_PANIC
))
602 seq_puts(seq
, ",errors=panic");
603 if (test_opt(sb
, NO_UID32
))
604 seq_puts(seq
, ",nouid32");
605 if (test_opt(sb
, DEBUG
))
606 seq_puts(seq
, ",debug");
607 if (test_opt(sb
, OLDALLOC
))
608 seq_puts(seq
, ",oldalloc");
609 #ifdef CONFIG_EXT3_FS_XATTR
610 if (test_opt(sb
, XATTR_USER
))
611 seq_puts(seq
, ",user_xattr");
612 if (!test_opt(sb
, XATTR_USER
) &&
613 (def_mount_opts
& EXT3_DEFM_XATTR_USER
)) {
614 seq_puts(seq
, ",nouser_xattr");
617 #ifdef CONFIG_EXT3_FS_POSIX_ACL
618 if (test_opt(sb
, POSIX_ACL
))
619 seq_puts(seq
, ",acl");
620 if (!test_opt(sb
, POSIX_ACL
) && (def_mount_opts
& EXT3_DEFM_ACL
))
621 seq_puts(seq
, ",noacl");
623 if (!test_opt(sb
, RESERVATION
))
624 seq_puts(seq
, ",noreservation");
625 if (sbi
->s_commit_interval
) {
626 seq_printf(seq
, ",commit=%u",
627 (unsigned) (sbi
->s_commit_interval
/ HZ
));
629 if (test_opt(sb
, BARRIER
))
630 seq_puts(seq
, ",barrier=1");
631 if (test_opt(sb
, NOBH
))
632 seq_puts(seq
, ",nobh");
634 seq_printf(seq
, ",data=%s", data_mode_string(sbi
->s_mount_opt
&
635 EXT3_MOUNT_DATA_FLAGS
));
636 if (test_opt(sb
, DATA_ERR_ABORT
))
637 seq_puts(seq
, ",data_err=abort");
639 if (test_opt(sb
, NOLOAD
))
640 seq_puts(seq
, ",norecovery");
642 ext3_show_quota_options(seq
, sb
);
648 static struct inode
*ext3_nfs_get_inode(struct super_block
*sb
,
649 u64 ino
, u32 generation
)
653 if (ino
< EXT3_FIRST_INO(sb
) && ino
!= EXT3_ROOT_INO
)
654 return ERR_PTR(-ESTALE
);
655 if (ino
> le32_to_cpu(EXT3_SB(sb
)->s_es
->s_inodes_count
))
656 return ERR_PTR(-ESTALE
);
658 /* iget isn't really right if the inode is currently unallocated!!
660 * ext3_read_inode will return a bad_inode if the inode had been
661 * deleted, so we should be safe.
663 * Currently we don't know the generation for parent directory, so
664 * a generation of 0 means "accept any"
666 inode
= ext3_iget(sb
, ino
);
668 return ERR_CAST(inode
);
669 if (generation
&& inode
->i_generation
!= generation
) {
671 return ERR_PTR(-ESTALE
);
677 static struct dentry
*ext3_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
678 int fh_len
, int fh_type
)
680 return generic_fh_to_dentry(sb
, fid
, fh_len
, fh_type
,
684 static struct dentry
*ext3_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
685 int fh_len
, int fh_type
)
687 return generic_fh_to_parent(sb
, fid
, fh_len
, fh_type
,
692 * Try to release metadata pages (indirect blocks, directories) which are
693 * mapped via the block device. Since these pages could have journal heads
694 * which would prevent try_to_free_buffers() from freeing them, we must use
695 * jbd layer's try_to_free_buffers() function to release them.
697 static int bdev_try_to_free_page(struct super_block
*sb
, struct page
*page
,
700 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
702 WARN_ON(PageChecked(page
));
703 if (!page_has_buffers(page
))
706 return journal_try_to_free_buffers(journal
, page
,
708 return try_to_free_buffers(page
);
712 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
713 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
715 static int ext3_write_dquot(struct dquot
*dquot
);
716 static int ext3_acquire_dquot(struct dquot
*dquot
);
717 static int ext3_release_dquot(struct dquot
*dquot
);
718 static int ext3_mark_dquot_dirty(struct dquot
*dquot
);
719 static int ext3_write_info(struct super_block
*sb
, int type
);
720 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
721 char *path
, int remount
);
722 static int ext3_quota_on_mount(struct super_block
*sb
, int type
);
723 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
724 size_t len
, loff_t off
);
725 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
726 const char *data
, size_t len
, loff_t off
);
728 static const struct dquot_operations ext3_quota_operations
= {
729 .initialize
= dquot_initialize
,
731 .alloc_space
= dquot_alloc_space
,
732 .alloc_inode
= dquot_alloc_inode
,
733 .free_space
= dquot_free_space
,
734 .free_inode
= dquot_free_inode
,
735 .transfer
= dquot_transfer
,
736 .write_dquot
= ext3_write_dquot
,
737 .acquire_dquot
= ext3_acquire_dquot
,
738 .release_dquot
= ext3_release_dquot
,
739 .mark_dirty
= ext3_mark_dquot_dirty
,
740 .write_info
= ext3_write_info
,
741 .alloc_dquot
= dquot_alloc
,
742 .destroy_dquot
= dquot_destroy
,
745 static const struct quotactl_ops ext3_qctl_operations
= {
746 .quota_on
= ext3_quota_on
,
747 .quota_off
= vfs_quota_off
,
748 .quota_sync
= vfs_quota_sync
,
749 .get_info
= vfs_get_dqinfo
,
750 .set_info
= vfs_set_dqinfo
,
751 .get_dqblk
= vfs_get_dqblk
,
752 .set_dqblk
= vfs_set_dqblk
756 static const struct super_operations ext3_sops
= {
757 .alloc_inode
= ext3_alloc_inode
,
758 .destroy_inode
= ext3_destroy_inode
,
759 .write_inode
= ext3_write_inode
,
760 .dirty_inode
= ext3_dirty_inode
,
761 .delete_inode
= ext3_delete_inode
,
762 .put_super
= ext3_put_super
,
763 .sync_fs
= ext3_sync_fs
,
764 .freeze_fs
= ext3_freeze
,
765 .unfreeze_fs
= ext3_unfreeze
,
766 .statfs
= ext3_statfs
,
767 .remount_fs
= ext3_remount
,
768 .clear_inode
= ext3_clear_inode
,
769 .show_options
= ext3_show_options
,
771 .quota_read
= ext3_quota_read
,
772 .quota_write
= ext3_quota_write
,
774 .bdev_try_to_free_page
= bdev_try_to_free_page
,
777 static const struct export_operations ext3_export_ops
= {
778 .fh_to_dentry
= ext3_fh_to_dentry
,
779 .fh_to_parent
= ext3_fh_to_parent
,
780 .get_parent
= ext3_get_parent
,
784 Opt_bsd_df
, Opt_minix_df
, Opt_grpid
, Opt_nogrpid
,
785 Opt_resgid
, Opt_resuid
, Opt_sb
, Opt_err_cont
, Opt_err_panic
, Opt_err_ro
,
786 Opt_nouid32
, Opt_nocheck
, Opt_debug
, Opt_oldalloc
, Opt_orlov
,
787 Opt_user_xattr
, Opt_nouser_xattr
, Opt_acl
, Opt_noacl
,
788 Opt_reservation
, Opt_noreservation
, Opt_noload
, Opt_nobh
, Opt_bh
,
789 Opt_commit
, Opt_journal_update
, Opt_journal_inum
, Opt_journal_dev
,
790 Opt_abort
, Opt_data_journal
, Opt_data_ordered
, Opt_data_writeback
,
791 Opt_data_err_abort
, Opt_data_err_ignore
,
792 Opt_usrjquota
, Opt_grpjquota
, Opt_offusrjquota
, Opt_offgrpjquota
,
793 Opt_jqfmt_vfsold
, Opt_jqfmt_vfsv0
, Opt_quota
, Opt_noquota
,
794 Opt_ignore
, Opt_barrier
, Opt_err
, Opt_resize
, Opt_usrquota
,
798 static const match_table_t tokens
= {
799 {Opt_bsd_df
, "bsddf"},
800 {Opt_minix_df
, "minixdf"},
801 {Opt_grpid
, "grpid"},
802 {Opt_grpid
, "bsdgroups"},
803 {Opt_nogrpid
, "nogrpid"},
804 {Opt_nogrpid
, "sysvgroups"},
805 {Opt_resgid
, "resgid=%u"},
806 {Opt_resuid
, "resuid=%u"},
808 {Opt_err_cont
, "errors=continue"},
809 {Opt_err_panic
, "errors=panic"},
810 {Opt_err_ro
, "errors=remount-ro"},
811 {Opt_nouid32
, "nouid32"},
812 {Opt_nocheck
, "nocheck"},
813 {Opt_nocheck
, "check=none"},
814 {Opt_debug
, "debug"},
815 {Opt_oldalloc
, "oldalloc"},
816 {Opt_orlov
, "orlov"},
817 {Opt_user_xattr
, "user_xattr"},
818 {Opt_nouser_xattr
, "nouser_xattr"},
820 {Opt_noacl
, "noacl"},
821 {Opt_reservation
, "reservation"},
822 {Opt_noreservation
, "noreservation"},
823 {Opt_noload
, "noload"},
824 {Opt_noload
, "norecovery"},
827 {Opt_commit
, "commit=%u"},
828 {Opt_journal_update
, "journal=update"},
829 {Opt_journal_inum
, "journal=%u"},
830 {Opt_journal_dev
, "journal_dev=%u"},
831 {Opt_abort
, "abort"},
832 {Opt_data_journal
, "data=journal"},
833 {Opt_data_ordered
, "data=ordered"},
834 {Opt_data_writeback
, "data=writeback"},
835 {Opt_data_err_abort
, "data_err=abort"},
836 {Opt_data_err_ignore
, "data_err=ignore"},
837 {Opt_offusrjquota
, "usrjquota="},
838 {Opt_usrjquota
, "usrjquota=%s"},
839 {Opt_offgrpjquota
, "grpjquota="},
840 {Opt_grpjquota
, "grpjquota=%s"},
841 {Opt_jqfmt_vfsold
, "jqfmt=vfsold"},
842 {Opt_jqfmt_vfsv0
, "jqfmt=vfsv0"},
843 {Opt_grpquota
, "grpquota"},
844 {Opt_noquota
, "noquota"},
845 {Opt_quota
, "quota"},
846 {Opt_usrquota
, "usrquota"},
847 {Opt_barrier
, "barrier=%u"},
848 {Opt_resize
, "resize"},
852 static ext3_fsblk_t
get_sb_block(void **data
)
854 ext3_fsblk_t sb_block
;
855 char *options
= (char *) *data
;
857 if (!options
|| strncmp(options
, "sb=", 3) != 0)
858 return 1; /* Default location */
860 /*todo: use simple_strtoll with >32bit ext3 */
861 sb_block
= simple_strtoul(options
, &options
, 0);
862 if (*options
&& *options
!= ',') {
863 printk("EXT3-fs: Invalid sb specification: %s\n",
869 *data
= (void *) options
;
873 static int parse_options (char *options
, struct super_block
*sb
,
874 unsigned int *inum
, unsigned long *journal_devnum
,
875 ext3_fsblk_t
*n_blocks_count
, int is_remount
)
877 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
879 substring_t args
[MAX_OPT_ARGS
];
890 while ((p
= strsep (&options
, ",")) != NULL
) {
895 token
= match_token(p
, tokens
, args
);
898 clear_opt (sbi
->s_mount_opt
, MINIX_DF
);
901 set_opt (sbi
->s_mount_opt
, MINIX_DF
);
904 set_opt (sbi
->s_mount_opt
, GRPID
);
907 clear_opt (sbi
->s_mount_opt
, GRPID
);
910 if (match_int(&args
[0], &option
))
912 sbi
->s_resuid
= option
;
915 if (match_int(&args
[0], &option
))
917 sbi
->s_resgid
= option
;
920 /* handled by get_sb_block() instead of here */
921 /* *sb_block = match_int(&args[0]); */
924 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
925 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
926 set_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
929 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
930 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
931 set_opt (sbi
->s_mount_opt
, ERRORS_RO
);
934 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
935 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
936 set_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
939 set_opt (sbi
->s_mount_opt
, NO_UID32
);
942 clear_opt (sbi
->s_mount_opt
, CHECK
);
945 set_opt (sbi
->s_mount_opt
, DEBUG
);
948 set_opt (sbi
->s_mount_opt
, OLDALLOC
);
951 clear_opt (sbi
->s_mount_opt
, OLDALLOC
);
953 #ifdef CONFIG_EXT3_FS_XATTR
955 set_opt (sbi
->s_mount_opt
, XATTR_USER
);
957 case Opt_nouser_xattr
:
958 clear_opt (sbi
->s_mount_opt
, XATTR_USER
);
962 case Opt_nouser_xattr
:
963 printk("EXT3 (no)user_xattr options not supported\n");
966 #ifdef CONFIG_EXT3_FS_POSIX_ACL
968 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
971 clear_opt(sbi
->s_mount_opt
, POSIX_ACL
);
976 printk("EXT3 (no)acl options not supported\n");
979 case Opt_reservation
:
980 set_opt(sbi
->s_mount_opt
, RESERVATION
);
982 case Opt_noreservation
:
983 clear_opt(sbi
->s_mount_opt
, RESERVATION
);
985 case Opt_journal_update
:
987 /* Eventually we will want to be able to create
988 a journal file here. For now, only allow the
989 user to specify an existing inode to be the
992 printk(KERN_ERR
"EXT3-fs: cannot specify "
993 "journal on remount\n");
996 set_opt (sbi
->s_mount_opt
, UPDATE_JOURNAL
);
998 case Opt_journal_inum
:
1000 printk(KERN_ERR
"EXT3-fs: cannot specify "
1001 "journal on remount\n");
1004 if (match_int(&args
[0], &option
))
1008 case Opt_journal_dev
:
1010 printk(KERN_ERR
"EXT3-fs: cannot specify "
1011 "journal on remount\n");
1014 if (match_int(&args
[0], &option
))
1016 *journal_devnum
= option
;
1019 set_opt (sbi
->s_mount_opt
, NOLOAD
);
1022 if (match_int(&args
[0], &option
))
1027 option
= JBD_DEFAULT_MAX_COMMIT_AGE
;
1028 sbi
->s_commit_interval
= HZ
* option
;
1030 case Opt_data_journal
:
1031 data_opt
= EXT3_MOUNT_JOURNAL_DATA
;
1033 case Opt_data_ordered
:
1034 data_opt
= EXT3_MOUNT_ORDERED_DATA
;
1036 case Opt_data_writeback
:
1037 data_opt
= EXT3_MOUNT_WRITEBACK_DATA
;
1040 if ((sbi
->s_mount_opt
& EXT3_MOUNT_DATA_FLAGS
)
1044 "EXT3-fs (device %s): Cannot change "
1045 "data mode on remount. The filesystem "
1046 "is mounted in data=%s mode and you "
1047 "try to remount it in data=%s mode.\n",
1049 data_mode_string(sbi
->s_mount_opt
&
1050 EXT3_MOUNT_DATA_FLAGS
),
1051 data_mode_string(data_opt
));
1054 sbi
->s_mount_opt
&= ~EXT3_MOUNT_DATA_FLAGS
;
1055 sbi
->s_mount_opt
|= data_opt
;
1058 case Opt_data_err_abort
:
1059 set_opt(sbi
->s_mount_opt
, DATA_ERR_ABORT
);
1061 case Opt_data_err_ignore
:
1062 clear_opt(sbi
->s_mount_opt
, DATA_ERR_ABORT
);
1071 if (sb_any_quota_loaded(sb
) &&
1072 !sbi
->s_qf_names
[qtype
]) {
1074 "EXT3-fs: Cannot change journaled "
1075 "quota options when quota turned on.\n");
1078 qname
= match_strdup(&args
[0]);
1081 "EXT3-fs: not enough memory for "
1082 "storing quotafile name.\n");
1085 if (sbi
->s_qf_names
[qtype
] &&
1086 strcmp(sbi
->s_qf_names
[qtype
], qname
)) {
1088 "EXT3-fs: %s quota file already "
1089 "specified.\n", QTYPE2NAME(qtype
));
1093 sbi
->s_qf_names
[qtype
] = qname
;
1094 if (strchr(sbi
->s_qf_names
[qtype
], '/')) {
1096 "EXT3-fs: quotafile must be on "
1097 "filesystem root.\n");
1098 kfree(sbi
->s_qf_names
[qtype
]);
1099 sbi
->s_qf_names
[qtype
] = NULL
;
1102 set_opt(sbi
->s_mount_opt
, QUOTA
);
1104 case Opt_offusrjquota
:
1107 case Opt_offgrpjquota
:
1110 if (sb_any_quota_loaded(sb
) &&
1111 sbi
->s_qf_names
[qtype
]) {
1112 printk(KERN_ERR
"EXT3-fs: Cannot change "
1113 "journaled quota options when "
1114 "quota turned on.\n");
1118 * The space will be released later when all options
1119 * are confirmed to be correct
1121 sbi
->s_qf_names
[qtype
] = NULL
;
1123 case Opt_jqfmt_vfsold
:
1124 qfmt
= QFMT_VFS_OLD
;
1126 case Opt_jqfmt_vfsv0
:
1129 if (sb_any_quota_loaded(sb
) &&
1130 sbi
->s_jquota_fmt
!= qfmt
) {
1131 printk(KERN_ERR
"EXT3-fs: Cannot change "
1132 "journaled quota options when "
1133 "quota turned on.\n");
1136 sbi
->s_jquota_fmt
= qfmt
;
1140 set_opt(sbi
->s_mount_opt
, QUOTA
);
1141 set_opt(sbi
->s_mount_opt
, USRQUOTA
);
1144 set_opt(sbi
->s_mount_opt
, QUOTA
);
1145 set_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1148 if (sb_any_quota_loaded(sb
)) {
1149 printk(KERN_ERR
"EXT3-fs: Cannot change quota "
1150 "options when quota turned on.\n");
1153 clear_opt(sbi
->s_mount_opt
, QUOTA
);
1154 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1155 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1162 "EXT3-fs: quota options not supported.\n");
1166 case Opt_offusrjquota
:
1167 case Opt_offgrpjquota
:
1168 case Opt_jqfmt_vfsold
:
1169 case Opt_jqfmt_vfsv0
:
1171 "EXT3-fs: journaled quota options not "
1178 set_opt(sbi
->s_mount_opt
, ABORT
);
1181 if (match_int(&args
[0], &option
))
1184 set_opt(sbi
->s_mount_opt
, BARRIER
);
1186 clear_opt(sbi
->s_mount_opt
, BARRIER
);
1192 printk("EXT3-fs: resize option only available "
1196 if (match_int(&args
[0], &option
) != 0)
1198 *n_blocks_count
= option
;
1201 set_opt(sbi
->s_mount_opt
, NOBH
);
1204 clear_opt(sbi
->s_mount_opt
, NOBH
);
1208 "EXT3-fs: Unrecognized mount option \"%s\" "
1209 "or missing value\n", p
);
1214 if (sbi
->s_qf_names
[USRQUOTA
] || sbi
->s_qf_names
[GRPQUOTA
]) {
1215 if ((sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
) &&
1216 sbi
->s_qf_names
[USRQUOTA
])
1217 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1219 if ((sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
) &&
1220 sbi
->s_qf_names
[GRPQUOTA
])
1221 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1223 if ((sbi
->s_qf_names
[USRQUOTA
] &&
1224 (sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
)) ||
1225 (sbi
->s_qf_names
[GRPQUOTA
] &&
1226 (sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
))) {
1227 printk(KERN_ERR
"EXT3-fs: old and new quota "
1228 "format mixing.\n");
1232 if (!sbi
->s_jquota_fmt
) {
1233 printk(KERN_ERR
"EXT3-fs: journaled quota format "
1234 "not specified.\n");
1238 if (sbi
->s_jquota_fmt
) {
1239 printk(KERN_ERR
"EXT3-fs: journaled quota format "
1240 "specified with no journaling "
1249 static int ext3_setup_super(struct super_block
*sb
, struct ext3_super_block
*es
,
1252 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1255 if (le32_to_cpu(es
->s_rev_level
) > EXT3_MAX_SUPP_REV
) {
1256 printk (KERN_ERR
"EXT3-fs warning: revision level too high, "
1257 "forcing read-only mode\n");
1262 if (!(sbi
->s_mount_state
& EXT3_VALID_FS
))
1263 printk (KERN_WARNING
"EXT3-fs warning: mounting unchecked fs, "
1264 "running e2fsck is recommended\n");
1265 else if ((sbi
->s_mount_state
& EXT3_ERROR_FS
))
1266 printk (KERN_WARNING
1267 "EXT3-fs warning: mounting fs with errors, "
1268 "running e2fsck is recommended\n");
1269 else if ((__s16
) le16_to_cpu(es
->s_max_mnt_count
) >= 0 &&
1270 le16_to_cpu(es
->s_mnt_count
) >=
1271 (unsigned short) (__s16
) le16_to_cpu(es
->s_max_mnt_count
))
1272 printk (KERN_WARNING
1273 "EXT3-fs warning: maximal mount count reached, "
1274 "running e2fsck is recommended\n");
1275 else if (le32_to_cpu(es
->s_checkinterval
) &&
1276 (le32_to_cpu(es
->s_lastcheck
) +
1277 le32_to_cpu(es
->s_checkinterval
) <= get_seconds()))
1278 printk (KERN_WARNING
1279 "EXT3-fs warning: checktime reached, "
1280 "running e2fsck is recommended\n");
1282 /* @@@ We _will_ want to clear the valid bit if we find
1283 inconsistencies, to force a fsck at reboot. But for
1284 a plain journaled filesystem we can keep it set as
1285 valid forever! :) */
1286 es
->s_state
&= cpu_to_le16(~EXT3_VALID_FS
);
1288 if (!(__s16
) le16_to_cpu(es
->s_max_mnt_count
))
1289 es
->s_max_mnt_count
= cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT
);
1290 le16_add_cpu(&es
->s_mnt_count
, 1);
1291 es
->s_mtime
= cpu_to_le32(get_seconds());
1292 ext3_update_dynamic_rev(sb
);
1293 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
1295 ext3_commit_super(sb
, es
, 1);
1296 if (test_opt(sb
, DEBUG
))
1297 printk(KERN_INFO
"[EXT3 FS bs=%lu, gc=%lu, "
1298 "bpg=%lu, ipg=%lu, mo=%04lx]\n",
1300 sbi
->s_groups_count
,
1301 EXT3_BLOCKS_PER_GROUP(sb
),
1302 EXT3_INODES_PER_GROUP(sb
),
1305 printk(KERN_INFO
"EXT3 FS on %s, ", sb
->s_id
);
1306 if (EXT3_SB(sb
)->s_journal
->j_inode
== NULL
) {
1307 char b
[BDEVNAME_SIZE
];
1309 printk("external journal on %s\n",
1310 bdevname(EXT3_SB(sb
)->s_journal
->j_dev
, b
));
1312 printk("internal journal\n");
1317 /* Called at mount-time, super-block is locked */
1318 static int ext3_check_descriptors(struct super_block
*sb
)
1320 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1323 ext3_debug ("Checking group descriptors");
1325 for (i
= 0; i
< sbi
->s_groups_count
; i
++) {
1326 struct ext3_group_desc
*gdp
= ext3_get_group_desc(sb
, i
, NULL
);
1327 ext3_fsblk_t first_block
= ext3_group_first_block_no(sb
, i
);
1328 ext3_fsblk_t last_block
;
1330 if (i
== sbi
->s_groups_count
- 1)
1331 last_block
= le32_to_cpu(sbi
->s_es
->s_blocks_count
) - 1;
1333 last_block
= first_block
+
1334 (EXT3_BLOCKS_PER_GROUP(sb
) - 1);
1336 if (le32_to_cpu(gdp
->bg_block_bitmap
) < first_block
||
1337 le32_to_cpu(gdp
->bg_block_bitmap
) > last_block
)
1339 ext3_error (sb
, "ext3_check_descriptors",
1340 "Block bitmap for group %d"
1341 " not in group (block %lu)!",
1343 le32_to_cpu(gdp
->bg_block_bitmap
));
1346 if (le32_to_cpu(gdp
->bg_inode_bitmap
) < first_block
||
1347 le32_to_cpu(gdp
->bg_inode_bitmap
) > last_block
)
1349 ext3_error (sb
, "ext3_check_descriptors",
1350 "Inode bitmap for group %d"
1351 " not in group (block %lu)!",
1353 le32_to_cpu(gdp
->bg_inode_bitmap
));
1356 if (le32_to_cpu(gdp
->bg_inode_table
) < first_block
||
1357 le32_to_cpu(gdp
->bg_inode_table
) + sbi
->s_itb_per_group
- 1 >
1360 ext3_error (sb
, "ext3_check_descriptors",
1361 "Inode table for group %d"
1362 " not in group (block %lu)!",
1364 le32_to_cpu(gdp
->bg_inode_table
));
1369 sbi
->s_es
->s_free_blocks_count
=cpu_to_le32(ext3_count_free_blocks(sb
));
1370 sbi
->s_es
->s_free_inodes_count
=cpu_to_le32(ext3_count_free_inodes(sb
));
1375 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1376 * the superblock) which were deleted from all directories, but held open by
1377 * a process at the time of a crash. We walk the list and try to delete these
1378 * inodes at recovery time (only with a read-write filesystem).
1380 * In order to keep the orphan inode chain consistent during traversal (in
1381 * case of crash during recovery), we link each inode into the superblock
1382 * orphan list_head and handle it the same way as an inode deletion during
1383 * normal operation (which journals the operations for us).
1385 * We only do an iget() and an iput() on each inode, which is very safe if we
1386 * accidentally point at an in-use or already deleted inode. The worst that
1387 * can happen in this case is that we get a "bit already cleared" message from
1388 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1389 * e2fsck was run on this filesystem, and it must have already done the orphan
1390 * inode cleanup for us, so we can safely abort without any further action.
1392 static void ext3_orphan_cleanup (struct super_block
* sb
,
1393 struct ext3_super_block
* es
)
1395 unsigned int s_flags
= sb
->s_flags
;
1396 int nr_orphans
= 0, nr_truncates
= 0;
1400 if (!es
->s_last_orphan
) {
1401 jbd_debug(4, "no orphan inodes to clean up\n");
1405 if (bdev_read_only(sb
->s_bdev
)) {
1406 printk(KERN_ERR
"EXT3-fs: write access "
1407 "unavailable, skipping orphan cleanup.\n");
1411 if (EXT3_SB(sb
)->s_mount_state
& EXT3_ERROR_FS
) {
1412 if (es
->s_last_orphan
)
1413 jbd_debug(1, "Errors on filesystem, "
1414 "clearing orphan list.\n");
1415 es
->s_last_orphan
= 0;
1416 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1420 if (s_flags
& MS_RDONLY
) {
1421 printk(KERN_INFO
"EXT3-fs: %s: orphan cleanup on readonly fs\n",
1423 sb
->s_flags
&= ~MS_RDONLY
;
1426 /* Needed for iput() to work correctly and not trash data */
1427 sb
->s_flags
|= MS_ACTIVE
;
1428 /* Turn on quotas so that they are updated correctly */
1429 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1430 if (EXT3_SB(sb
)->s_qf_names
[i
]) {
1431 int ret
= ext3_quota_on_mount(sb
, i
);
1434 "EXT3-fs: Cannot turn on journaled "
1435 "quota: error %d\n", ret
);
1440 while (es
->s_last_orphan
) {
1441 struct inode
*inode
;
1443 inode
= ext3_orphan_get(sb
, le32_to_cpu(es
->s_last_orphan
));
1444 if (IS_ERR(inode
)) {
1445 es
->s_last_orphan
= 0;
1449 list_add(&EXT3_I(inode
)->i_orphan
, &EXT3_SB(sb
)->s_orphan
);
1451 if (inode
->i_nlink
) {
1453 "%s: truncating inode %lu to %Ld bytes\n",
1454 __func__
, inode
->i_ino
, inode
->i_size
);
1455 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1456 inode
->i_ino
, inode
->i_size
);
1457 ext3_truncate(inode
);
1461 "%s: deleting unreferenced inode %lu\n",
1462 __func__
, inode
->i_ino
);
1463 jbd_debug(2, "deleting unreferenced inode %lu\n",
1467 iput(inode
); /* The delete magic happens here! */
1470 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1473 printk(KERN_INFO
"EXT3-fs: %s: %d orphan inode%s deleted\n",
1474 sb
->s_id
, PLURAL(nr_orphans
));
1476 printk(KERN_INFO
"EXT3-fs: %s: %d truncate%s cleaned up\n",
1477 sb
->s_id
, PLURAL(nr_truncates
));
1479 /* Turn quotas off */
1480 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1481 if (sb_dqopt(sb
)->files
[i
])
1482 vfs_quota_off(sb
, i
, 0);
1485 sb
->s_flags
= s_flags
; /* Restore MS_RDONLY status */
1489 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1490 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1491 * We need to be 1 filesystem block less than the 2^32 sector limit.
1493 static loff_t
ext3_max_size(int bits
)
1495 loff_t res
= EXT3_NDIR_BLOCKS
;
1499 /* This is calculated to be the largest file size for a
1500 * dense, file such that the total number of
1501 * sectors in the file, including data and all indirect blocks,
1502 * does not exceed 2^32 -1
1503 * __u32 i_blocks representing the total number of
1504 * 512 bytes blocks of the file
1506 upper_limit
= (1LL << 32) - 1;
1508 /* total blocks in file system block size */
1509 upper_limit
>>= (bits
- 9);
1512 /* indirect blocks */
1514 /* double indirect blocks */
1515 meta_blocks
+= 1 + (1LL << (bits
-2));
1516 /* tripple indirect blocks */
1517 meta_blocks
+= 1 + (1LL << (bits
-2)) + (1LL << (2*(bits
-2)));
1519 upper_limit
-= meta_blocks
;
1520 upper_limit
<<= bits
;
1522 res
+= 1LL << (bits
-2);
1523 res
+= 1LL << (2*(bits
-2));
1524 res
+= 1LL << (3*(bits
-2));
1526 if (res
> upper_limit
)
1529 if (res
> MAX_LFS_FILESIZE
)
1530 res
= MAX_LFS_FILESIZE
;
1535 static ext3_fsblk_t
descriptor_loc(struct super_block
*sb
,
1536 ext3_fsblk_t logic_sb_block
,
1539 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1540 unsigned long bg
, first_meta_bg
;
1543 first_meta_bg
= le32_to_cpu(sbi
->s_es
->s_first_meta_bg
);
1545 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_META_BG
) ||
1547 return (logic_sb_block
+ nr
+ 1);
1548 bg
= sbi
->s_desc_per_block
* nr
;
1549 if (ext3_bg_has_super(sb
, bg
))
1551 return (has_super
+ ext3_group_first_block_no(sb
, bg
));
1555 static int ext3_fill_super (struct super_block
*sb
, void *data
, int silent
)
1557 struct buffer_head
* bh
;
1558 struct ext3_super_block
*es
= NULL
;
1559 struct ext3_sb_info
*sbi
;
1561 ext3_fsblk_t sb_block
= get_sb_block(&data
);
1562 ext3_fsblk_t logic_sb_block
;
1563 unsigned long offset
= 0;
1564 unsigned int journal_inum
= 0;
1565 unsigned long journal_devnum
= 0;
1566 unsigned long def_mount_opts
;
1577 sbi
= kzalloc(sizeof(*sbi
), GFP_KERNEL
);
1581 sbi
->s_blockgroup_lock
=
1582 kzalloc(sizeof(struct blockgroup_lock
), GFP_KERNEL
);
1583 if (!sbi
->s_blockgroup_lock
) {
1587 sb
->s_fs_info
= sbi
;
1588 sbi
->s_mount_opt
= 0;
1589 sbi
->s_resuid
= EXT3_DEF_RESUID
;
1590 sbi
->s_resgid
= EXT3_DEF_RESGID
;
1591 sbi
->s_sb_block
= sb_block
;
1595 blocksize
= sb_min_blocksize(sb
, EXT3_MIN_BLOCK_SIZE
);
1597 printk(KERN_ERR
"EXT3-fs: unable to set blocksize\n");
1602 * The ext3 superblock will not be buffer aligned for other than 1kB
1603 * block sizes. We need to calculate the offset from buffer start.
1605 if (blocksize
!= EXT3_MIN_BLOCK_SIZE
) {
1606 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1607 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1609 logic_sb_block
= sb_block
;
1612 if (!(bh
= sb_bread(sb
, logic_sb_block
))) {
1613 printk (KERN_ERR
"EXT3-fs: unable to read superblock\n");
1617 * Note: s_es must be initialized as soon as possible because
1618 * some ext3 macro-instructions depend on its value
1620 es
= (struct ext3_super_block
*) (((char *)bh
->b_data
) + offset
);
1622 sb
->s_magic
= le16_to_cpu(es
->s_magic
);
1623 if (sb
->s_magic
!= EXT3_SUPER_MAGIC
)
1626 /* Set defaults before we parse the mount options */
1627 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
1628 if (def_mount_opts
& EXT3_DEFM_DEBUG
)
1629 set_opt(sbi
->s_mount_opt
, DEBUG
);
1630 if (def_mount_opts
& EXT3_DEFM_BSDGROUPS
)
1631 set_opt(sbi
->s_mount_opt
, GRPID
);
1632 if (def_mount_opts
& EXT3_DEFM_UID16
)
1633 set_opt(sbi
->s_mount_opt
, NO_UID32
);
1634 #ifdef CONFIG_EXT3_FS_XATTR
1635 if (def_mount_opts
& EXT3_DEFM_XATTR_USER
)
1636 set_opt(sbi
->s_mount_opt
, XATTR_USER
);
1638 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1639 if (def_mount_opts
& EXT3_DEFM_ACL
)
1640 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
1642 if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_DATA
)
1643 sbi
->s_mount_opt
|= EXT3_MOUNT_JOURNAL_DATA
;
1644 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_ORDERED
)
1645 sbi
->s_mount_opt
|= EXT3_MOUNT_ORDERED_DATA
;
1646 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_WBACK
)
1647 sbi
->s_mount_opt
|= EXT3_MOUNT_WRITEBACK_DATA
;
1649 if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_PANIC
)
1650 set_opt(sbi
->s_mount_opt
, ERRORS_PANIC
);
1651 else if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_CONTINUE
)
1652 set_opt(sbi
->s_mount_opt
, ERRORS_CONT
);
1654 set_opt(sbi
->s_mount_opt
, ERRORS_RO
);
1656 sbi
->s_resuid
= le16_to_cpu(es
->s_def_resuid
);
1657 sbi
->s_resgid
= le16_to_cpu(es
->s_def_resgid
);
1659 set_opt(sbi
->s_mount_opt
, RESERVATION
);
1661 if (!parse_options ((char *) data
, sb
, &journal_inum
, &journal_devnum
,
1665 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
1666 ((sbi
->s_mount_opt
& EXT3_MOUNT_POSIX_ACL
) ? MS_POSIXACL
: 0);
1668 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
&&
1669 (EXT3_HAS_COMPAT_FEATURE(sb
, ~0U) ||
1670 EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~0U) ||
1671 EXT3_HAS_INCOMPAT_FEATURE(sb
, ~0U)))
1673 "EXT3-fs warning: feature flags set on rev 0 fs, "
1674 "running e2fsck is recommended\n");
1676 * Check feature flags regardless of the revision level, since we
1677 * previously didn't change the revision level when setting the flags,
1678 * so there is a chance incompat flags are set on a rev 0 filesystem.
1680 features
= EXT3_HAS_INCOMPAT_FEATURE(sb
, ~EXT3_FEATURE_INCOMPAT_SUPP
);
1682 printk(KERN_ERR
"EXT3-fs: %s: couldn't mount because of "
1683 "unsupported optional features (%x).\n",
1684 sb
->s_id
, le32_to_cpu(features
));
1687 features
= EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~EXT3_FEATURE_RO_COMPAT_SUPP
);
1688 if (!(sb
->s_flags
& MS_RDONLY
) && features
) {
1689 printk(KERN_ERR
"EXT3-fs: %s: couldn't mount RDWR because of "
1690 "unsupported optional features (%x).\n",
1691 sb
->s_id
, le32_to_cpu(features
));
1694 blocksize
= BLOCK_SIZE
<< le32_to_cpu(es
->s_log_block_size
);
1696 if (blocksize
< EXT3_MIN_BLOCK_SIZE
||
1697 blocksize
> EXT3_MAX_BLOCK_SIZE
) {
1699 "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n",
1700 blocksize
, sb
->s_id
);
1704 hblock
= bdev_logical_block_size(sb
->s_bdev
);
1705 if (sb
->s_blocksize
!= blocksize
) {
1707 * Make sure the blocksize for the filesystem is larger
1708 * than the hardware sectorsize for the machine.
1710 if (blocksize
< hblock
) {
1711 printk(KERN_ERR
"EXT3-fs: blocksize %d too small for "
1712 "device blocksize %d.\n", blocksize
, hblock
);
1717 if (!sb_set_blocksize(sb
, blocksize
)) {
1718 printk(KERN_ERR
"EXT3-fs: bad blocksize %d.\n",
1722 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1723 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1724 bh
= sb_bread(sb
, logic_sb_block
);
1727 "EXT3-fs: Can't read superblock on 2nd try.\n");
1730 es
= (struct ext3_super_block
*)(((char *)bh
->b_data
) + offset
);
1732 if (es
->s_magic
!= cpu_to_le16(EXT3_SUPER_MAGIC
)) {
1734 "EXT3-fs: Magic mismatch, very weird !\n");
1739 sb
->s_maxbytes
= ext3_max_size(sb
->s_blocksize_bits
);
1741 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
) {
1742 sbi
->s_inode_size
= EXT3_GOOD_OLD_INODE_SIZE
;
1743 sbi
->s_first_ino
= EXT3_GOOD_OLD_FIRST_INO
;
1745 sbi
->s_inode_size
= le16_to_cpu(es
->s_inode_size
);
1746 sbi
->s_first_ino
= le32_to_cpu(es
->s_first_ino
);
1747 if ((sbi
->s_inode_size
< EXT3_GOOD_OLD_INODE_SIZE
) ||
1748 (!is_power_of_2(sbi
->s_inode_size
)) ||
1749 (sbi
->s_inode_size
> blocksize
)) {
1751 "EXT3-fs: unsupported inode size: %d\n",
1756 sbi
->s_frag_size
= EXT3_MIN_FRAG_SIZE
<<
1757 le32_to_cpu(es
->s_log_frag_size
);
1758 if (blocksize
!= sbi
->s_frag_size
) {
1760 "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n",
1761 sbi
->s_frag_size
, blocksize
);
1764 sbi
->s_frags_per_block
= 1;
1765 sbi
->s_blocks_per_group
= le32_to_cpu(es
->s_blocks_per_group
);
1766 sbi
->s_frags_per_group
= le32_to_cpu(es
->s_frags_per_group
);
1767 sbi
->s_inodes_per_group
= le32_to_cpu(es
->s_inodes_per_group
);
1768 if (EXT3_INODE_SIZE(sb
) == 0 || EXT3_INODES_PER_GROUP(sb
) == 0)
1770 sbi
->s_inodes_per_block
= blocksize
/ EXT3_INODE_SIZE(sb
);
1771 if (sbi
->s_inodes_per_block
== 0)
1773 sbi
->s_itb_per_group
= sbi
->s_inodes_per_group
/
1774 sbi
->s_inodes_per_block
;
1775 sbi
->s_desc_per_block
= blocksize
/ sizeof(struct ext3_group_desc
);
1777 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
1778 sbi
->s_addr_per_block_bits
= ilog2(EXT3_ADDR_PER_BLOCK(sb
));
1779 sbi
->s_desc_per_block_bits
= ilog2(EXT3_DESC_PER_BLOCK(sb
));
1780 for (i
=0; i
< 4; i
++)
1781 sbi
->s_hash_seed
[i
] = le32_to_cpu(es
->s_hash_seed
[i
]);
1782 sbi
->s_def_hash_version
= es
->s_def_hash_version
;
1783 i
= le32_to_cpu(es
->s_flags
);
1784 if (i
& EXT2_FLAGS_UNSIGNED_HASH
)
1785 sbi
->s_hash_unsigned
= 3;
1786 else if ((i
& EXT2_FLAGS_SIGNED_HASH
) == 0) {
1787 #ifdef __CHAR_UNSIGNED__
1788 es
->s_flags
|= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH
);
1789 sbi
->s_hash_unsigned
= 3;
1791 es
->s_flags
|= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH
);
1795 if (sbi
->s_blocks_per_group
> blocksize
* 8) {
1797 "EXT3-fs: #blocks per group too big: %lu\n",
1798 sbi
->s_blocks_per_group
);
1801 if (sbi
->s_frags_per_group
> blocksize
* 8) {
1803 "EXT3-fs: #fragments per group too big: %lu\n",
1804 sbi
->s_frags_per_group
);
1807 if (sbi
->s_inodes_per_group
> blocksize
* 8) {
1809 "EXT3-fs: #inodes per group too big: %lu\n",
1810 sbi
->s_inodes_per_group
);
1814 if (le32_to_cpu(es
->s_blocks_count
) >
1815 (sector_t
)(~0ULL) >> (sb
->s_blocksize_bits
- 9)) {
1816 printk(KERN_ERR
"EXT3-fs: filesystem on %s:"
1817 " too large to mount safely\n", sb
->s_id
);
1818 if (sizeof(sector_t
) < 8)
1819 printk(KERN_WARNING
"EXT3-fs: CONFIG_LBDAF not "
1824 if (EXT3_BLOCKS_PER_GROUP(sb
) == 0)
1826 sbi
->s_groups_count
= ((le32_to_cpu(es
->s_blocks_count
) -
1827 le32_to_cpu(es
->s_first_data_block
) - 1)
1828 / EXT3_BLOCKS_PER_GROUP(sb
)) + 1;
1829 db_count
= (sbi
->s_groups_count
+ EXT3_DESC_PER_BLOCK(sb
) - 1) /
1830 EXT3_DESC_PER_BLOCK(sb
);
1831 sbi
->s_group_desc
= kmalloc(db_count
* sizeof (struct buffer_head
*),
1833 if (sbi
->s_group_desc
== NULL
) {
1834 printk (KERN_ERR
"EXT3-fs: not enough memory\n");
1838 bgl_lock_init(sbi
->s_blockgroup_lock
);
1840 for (i
= 0; i
< db_count
; i
++) {
1841 block
= descriptor_loc(sb
, logic_sb_block
, i
);
1842 sbi
->s_group_desc
[i
] = sb_bread(sb
, block
);
1843 if (!sbi
->s_group_desc
[i
]) {
1844 printk (KERN_ERR
"EXT3-fs: "
1845 "can't read group descriptor %d\n", i
);
1850 if (!ext3_check_descriptors (sb
)) {
1851 printk(KERN_ERR
"EXT3-fs: group descriptors corrupted!\n");
1854 sbi
->s_gdb_count
= db_count
;
1855 get_random_bytes(&sbi
->s_next_generation
, sizeof(u32
));
1856 spin_lock_init(&sbi
->s_next_gen_lock
);
1858 err
= percpu_counter_init(&sbi
->s_freeblocks_counter
,
1859 ext3_count_free_blocks(sb
));
1861 err
= percpu_counter_init(&sbi
->s_freeinodes_counter
,
1862 ext3_count_free_inodes(sb
));
1865 err
= percpu_counter_init(&sbi
->s_dirs_counter
,
1866 ext3_count_dirs(sb
));
1869 printk(KERN_ERR
"EXT3-fs: insufficient memory\n");
1873 /* per fileystem reservation list head & lock */
1874 spin_lock_init(&sbi
->s_rsv_window_lock
);
1875 sbi
->s_rsv_window_root
= RB_ROOT
;
1876 /* Add a single, static dummy reservation to the start of the
1877 * reservation window list --- it gives us a placeholder for
1878 * append-at-start-of-list which makes the allocation logic
1879 * _much_ simpler. */
1880 sbi
->s_rsv_window_head
.rsv_start
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1881 sbi
->s_rsv_window_head
.rsv_end
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1882 sbi
->s_rsv_window_head
.rsv_alloc_hit
= 0;
1883 sbi
->s_rsv_window_head
.rsv_goal_size
= 0;
1884 ext3_rsv_window_add(sb
, &sbi
->s_rsv_window_head
);
1887 * set up enough so that it can read an inode
1889 sb
->s_op
= &ext3_sops
;
1890 sb
->s_export_op
= &ext3_export_ops
;
1891 sb
->s_xattr
= ext3_xattr_handlers
;
1893 sb
->s_qcop
= &ext3_qctl_operations
;
1894 sb
->dq_op
= &ext3_quota_operations
;
1896 INIT_LIST_HEAD(&sbi
->s_orphan
); /* unlinked but open files */
1900 needs_recovery
= (es
->s_last_orphan
!= 0 ||
1901 EXT3_HAS_INCOMPAT_FEATURE(sb
,
1902 EXT3_FEATURE_INCOMPAT_RECOVER
));
1905 * The first inode we look at is the journal inode. Don't try
1906 * root first: it may be modified in the journal!
1908 if (!test_opt(sb
, NOLOAD
) &&
1909 EXT3_HAS_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
)) {
1910 if (ext3_load_journal(sb
, es
, journal_devnum
))
1912 } else if (journal_inum
) {
1913 if (ext3_create_journal(sb
, es
, journal_inum
))
1918 "ext3: No journal on filesystem on %s\n",
1923 /* We have now updated the journal if required, so we can
1924 * validate the data journaling mode. */
1925 switch (test_opt(sb
, DATA_FLAGS
)) {
1927 /* No mode set, assume a default based on the journal
1928 capabilities: ORDERED_DATA if the journal can
1929 cope, else JOURNAL_DATA */
1930 if (journal_check_available_features
1931 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
))
1932 set_opt(sbi
->s_mount_opt
, DEFAULT_DATA_MODE
);
1934 set_opt(sbi
->s_mount_opt
, JOURNAL_DATA
);
1937 case EXT3_MOUNT_ORDERED_DATA
:
1938 case EXT3_MOUNT_WRITEBACK_DATA
:
1939 if (!journal_check_available_features
1940 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
)) {
1941 printk(KERN_ERR
"EXT3-fs: Journal does not support "
1942 "requested data journaling mode\n");
1949 if (test_opt(sb
, NOBH
)) {
1950 if (!(test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_WRITEBACK_DATA
)) {
1951 printk(KERN_WARNING
"EXT3-fs: Ignoring nobh option - "
1952 "its supported only with writeback mode\n");
1953 clear_opt(sbi
->s_mount_opt
, NOBH
);
1957 * The journal_load will have done any necessary log recovery,
1958 * so we can safely mount the rest of the filesystem now.
1961 root
= ext3_iget(sb
, EXT3_ROOT_INO
);
1963 printk(KERN_ERR
"EXT3-fs: get root inode failed\n");
1964 ret
= PTR_ERR(root
);
1967 if (!S_ISDIR(root
->i_mode
) || !root
->i_blocks
|| !root
->i_size
) {
1969 printk(KERN_ERR
"EXT3-fs: corrupt root inode, run e2fsck\n");
1972 sb
->s_root
= d_alloc_root(root
);
1974 printk(KERN_ERR
"EXT3-fs: get root dentry failed\n");
1980 ext3_setup_super (sb
, es
, sb
->s_flags
& MS_RDONLY
);
1982 * akpm: core read_super() calls in here with the superblock locked.
1983 * That deadlocks, because orphan cleanup needs to lock the superblock
1984 * in numerous places. Here we just pop the lock - it's relatively
1985 * harmless, because we are now ready to accept write_super() requests,
1986 * and aviro says that's the only reason for hanging onto the
1989 EXT3_SB(sb
)->s_mount_state
|= EXT3_ORPHAN_FS
;
1990 ext3_orphan_cleanup(sb
, es
);
1991 EXT3_SB(sb
)->s_mount_state
&= ~EXT3_ORPHAN_FS
;
1993 printk (KERN_INFO
"EXT3-fs: recovery complete.\n");
1994 ext3_mark_recovery_complete(sb
, es
);
1995 printk (KERN_INFO
"EXT3-fs: mounted filesystem with %s data mode.\n",
1996 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_JOURNAL_DATA
? "journal":
1997 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_ORDERED_DATA
? "ordered":
2005 printk(KERN_ERR
"VFS: Can't find ext3 filesystem on dev %s.\n",
2010 journal_destroy(sbi
->s_journal
);
2012 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
2013 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
2014 percpu_counter_destroy(&sbi
->s_dirs_counter
);
2016 for (i
= 0; i
< db_count
; i
++)
2017 brelse(sbi
->s_group_desc
[i
]);
2018 kfree(sbi
->s_group_desc
);
2021 for (i
= 0; i
< MAXQUOTAS
; i
++)
2022 kfree(sbi
->s_qf_names
[i
]);
2024 ext3_blkdev_remove(sbi
);
2027 sb
->s_fs_info
= NULL
;
2028 kfree(sbi
->s_blockgroup_lock
);
2035 * Setup any per-fs journal parameters now. We'll do this both on
2036 * initial mount, once the journal has been initialised but before we've
2037 * done any recovery; and again on any subsequent remount.
2039 static void ext3_init_journal_params(struct super_block
*sb
, journal_t
*journal
)
2041 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2043 if (sbi
->s_commit_interval
)
2044 journal
->j_commit_interval
= sbi
->s_commit_interval
;
2045 /* We could also set up an ext3-specific default for the commit
2046 * interval here, but for now we'll just fall back to the jbd
2049 spin_lock(&journal
->j_state_lock
);
2050 if (test_opt(sb
, BARRIER
))
2051 journal
->j_flags
|= JFS_BARRIER
;
2053 journal
->j_flags
&= ~JFS_BARRIER
;
2054 if (test_opt(sb
, DATA_ERR_ABORT
))
2055 journal
->j_flags
|= JFS_ABORT_ON_SYNCDATA_ERR
;
2057 journal
->j_flags
&= ~JFS_ABORT_ON_SYNCDATA_ERR
;
2058 spin_unlock(&journal
->j_state_lock
);
2061 static journal_t
*ext3_get_journal(struct super_block
*sb
,
2062 unsigned int journal_inum
)
2064 struct inode
*journal_inode
;
2067 /* First, test for the existence of a valid inode on disk. Bad
2068 * things happen if we iget() an unused inode, as the subsequent
2069 * iput() will try to delete it. */
2071 journal_inode
= ext3_iget(sb
, journal_inum
);
2072 if (IS_ERR(journal_inode
)) {
2073 printk(KERN_ERR
"EXT3-fs: no journal found.\n");
2076 if (!journal_inode
->i_nlink
) {
2077 make_bad_inode(journal_inode
);
2078 iput(journal_inode
);
2079 printk(KERN_ERR
"EXT3-fs: journal inode is deleted.\n");
2083 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2084 journal_inode
, journal_inode
->i_size
);
2085 if (!S_ISREG(journal_inode
->i_mode
)) {
2086 printk(KERN_ERR
"EXT3-fs: invalid journal inode.\n");
2087 iput(journal_inode
);
2091 journal
= journal_init_inode(journal_inode
);
2093 printk(KERN_ERR
"EXT3-fs: Could not load journal inode\n");
2094 iput(journal_inode
);
2097 journal
->j_private
= sb
;
2098 ext3_init_journal_params(sb
, journal
);
2102 static journal_t
*ext3_get_dev_journal(struct super_block
*sb
,
2105 struct buffer_head
* bh
;
2109 int hblock
, blocksize
;
2110 ext3_fsblk_t sb_block
;
2111 unsigned long offset
;
2112 struct ext3_super_block
* es
;
2113 struct block_device
*bdev
;
2115 bdev
= ext3_blkdev_get(j_dev
);
2119 if (bd_claim(bdev
, sb
)) {
2121 "EXT3: failed to claim external journal device.\n");
2122 blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
);
2126 blocksize
= sb
->s_blocksize
;
2127 hblock
= bdev_logical_block_size(bdev
);
2128 if (blocksize
< hblock
) {
2130 "EXT3-fs: blocksize too small for journal device.\n");
2134 sb_block
= EXT3_MIN_BLOCK_SIZE
/ blocksize
;
2135 offset
= EXT3_MIN_BLOCK_SIZE
% blocksize
;
2136 set_blocksize(bdev
, blocksize
);
2137 if (!(bh
= __bread(bdev
, sb_block
, blocksize
))) {
2138 printk(KERN_ERR
"EXT3-fs: couldn't read superblock of "
2139 "external journal\n");
2143 es
= (struct ext3_super_block
*) (((char *)bh
->b_data
) + offset
);
2144 if ((le16_to_cpu(es
->s_magic
) != EXT3_SUPER_MAGIC
) ||
2145 !(le32_to_cpu(es
->s_feature_incompat
) &
2146 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV
)) {
2147 printk(KERN_ERR
"EXT3-fs: external journal has "
2148 "bad superblock\n");
2153 if (memcmp(EXT3_SB(sb
)->s_es
->s_journal_uuid
, es
->s_uuid
, 16)) {
2154 printk(KERN_ERR
"EXT3-fs: journal UUID does not match\n");
2159 len
= le32_to_cpu(es
->s_blocks_count
);
2160 start
= sb_block
+ 1;
2161 brelse(bh
); /* we're done with the superblock */
2163 journal
= journal_init_dev(bdev
, sb
->s_bdev
,
2164 start
, len
, blocksize
);
2166 printk(KERN_ERR
"EXT3-fs: failed to create device journal\n");
2169 journal
->j_private
= sb
;
2170 ll_rw_block(READ
, 1, &journal
->j_sb_buffer
);
2171 wait_on_buffer(journal
->j_sb_buffer
);
2172 if (!buffer_uptodate(journal
->j_sb_buffer
)) {
2173 printk(KERN_ERR
"EXT3-fs: I/O error on journal device\n");
2176 if (be32_to_cpu(journal
->j_superblock
->s_nr_users
) != 1) {
2177 printk(KERN_ERR
"EXT3-fs: External journal has more than one "
2178 "user (unsupported) - %d\n",
2179 be32_to_cpu(journal
->j_superblock
->s_nr_users
));
2182 EXT3_SB(sb
)->journal_bdev
= bdev
;
2183 ext3_init_journal_params(sb
, journal
);
2186 journal_destroy(journal
);
2188 ext3_blkdev_put(bdev
);
2192 static int ext3_load_journal(struct super_block
*sb
,
2193 struct ext3_super_block
*es
,
2194 unsigned long journal_devnum
)
2197 unsigned int journal_inum
= le32_to_cpu(es
->s_journal_inum
);
2200 int really_read_only
;
2202 if (journal_devnum
&&
2203 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2204 printk(KERN_INFO
"EXT3-fs: external journal device major/minor "
2205 "numbers have changed\n");
2206 journal_dev
= new_decode_dev(journal_devnum
);
2208 journal_dev
= new_decode_dev(le32_to_cpu(es
->s_journal_dev
));
2210 really_read_only
= bdev_read_only(sb
->s_bdev
);
2213 * Are we loading a blank journal or performing recovery after a
2214 * crash? For recovery, we need to check in advance whether we
2215 * can get read-write access to the device.
2218 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
)) {
2219 if (sb
->s_flags
& MS_RDONLY
) {
2220 printk(KERN_INFO
"EXT3-fs: INFO: recovery "
2221 "required on readonly filesystem.\n");
2222 if (really_read_only
) {
2223 printk(KERN_ERR
"EXT3-fs: write access "
2224 "unavailable, cannot proceed.\n");
2227 printk (KERN_INFO
"EXT3-fs: write access will "
2228 "be enabled during recovery.\n");
2232 if (journal_inum
&& journal_dev
) {
2233 printk(KERN_ERR
"EXT3-fs: filesystem has both journal "
2234 "and inode journals!\n");
2239 if (!(journal
= ext3_get_journal(sb
, journal_inum
)))
2242 if (!(journal
= ext3_get_dev_journal(sb
, journal_dev
)))
2246 if (!really_read_only
&& test_opt(sb
, UPDATE_JOURNAL
)) {
2247 err
= journal_update_format(journal
);
2249 printk(KERN_ERR
"EXT3-fs: error updating journal.\n");
2250 journal_destroy(journal
);
2255 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
))
2256 err
= journal_wipe(journal
, !really_read_only
);
2258 err
= journal_load(journal
);
2261 printk(KERN_ERR
"EXT3-fs: error loading journal.\n");
2262 journal_destroy(journal
);
2266 EXT3_SB(sb
)->s_journal
= journal
;
2267 ext3_clear_journal_err(sb
, es
);
2269 if (journal_devnum
&&
2270 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2271 es
->s_journal_dev
= cpu_to_le32(journal_devnum
);
2273 /* Make sure we flush the recovery flag to disk. */
2274 ext3_commit_super(sb
, es
, 1);
2280 static int ext3_create_journal(struct super_block
* sb
,
2281 struct ext3_super_block
* es
,
2282 unsigned int journal_inum
)
2287 if (sb
->s_flags
& MS_RDONLY
) {
2288 printk(KERN_ERR
"EXT3-fs: readonly filesystem when trying to "
2289 "create journal.\n");
2293 journal
= ext3_get_journal(sb
, journal_inum
);
2297 printk(KERN_INFO
"EXT3-fs: creating new journal on inode %u\n",
2300 err
= journal_create(journal
);
2302 printk(KERN_ERR
"EXT3-fs: error creating journal.\n");
2303 journal_destroy(journal
);
2307 EXT3_SB(sb
)->s_journal
= journal
;
2309 ext3_update_dynamic_rev(sb
);
2310 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2311 EXT3_SET_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
);
2313 es
->s_journal_inum
= cpu_to_le32(journal_inum
);
2315 /* Make sure we flush the recovery flag to disk. */
2316 ext3_commit_super(sb
, es
, 1);
2321 static int ext3_commit_super(struct super_block
*sb
,
2322 struct ext3_super_block
*es
,
2325 struct buffer_head
*sbh
= EXT3_SB(sb
)->s_sbh
;
2331 * If the file system is mounted read-only, don't update the
2332 * superblock write time. This avoids updating the superblock
2333 * write time when we are mounting the root file system
2334 * read/only but we need to replay the journal; at that point,
2335 * for people who are east of GMT and who make their clock
2336 * tick in localtime for Windows bug-for-bug compatibility,
2337 * the clock is set in the future, and this will cause e2fsck
2338 * to complain and force a full file system check.
2340 if (!(sb
->s_flags
& MS_RDONLY
))
2341 es
->s_wtime
= cpu_to_le32(get_seconds());
2342 es
->s_free_blocks_count
= cpu_to_le32(ext3_count_free_blocks(sb
));
2343 es
->s_free_inodes_count
= cpu_to_le32(ext3_count_free_inodes(sb
));
2344 BUFFER_TRACE(sbh
, "marking dirty");
2345 mark_buffer_dirty(sbh
);
2347 error
= sync_dirty_buffer(sbh
);
2353 * Have we just finished recovery? If so, and if we are mounting (or
2354 * remounting) the filesystem readonly, then we will end up with a
2355 * consistent fs on disk. Record that fact.
2357 static void ext3_mark_recovery_complete(struct super_block
* sb
,
2358 struct ext3_super_block
* es
)
2360 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
2362 journal_lock_updates(journal
);
2363 if (journal_flush(journal
) < 0)
2367 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
) &&
2368 sb
->s_flags
& MS_RDONLY
) {
2369 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2370 ext3_commit_super(sb
, es
, 1);
2375 journal_unlock_updates(journal
);
2379 * If we are mounting (or read-write remounting) a filesystem whose journal
2380 * has recorded an error from a previous lifetime, move that error to the
2381 * main filesystem now.
2383 static void ext3_clear_journal_err(struct super_block
* sb
,
2384 struct ext3_super_block
* es
)
2390 journal
= EXT3_SB(sb
)->s_journal
;
2393 * Now check for any error status which may have been recorded in the
2394 * journal by a prior ext3_error() or ext3_abort()
2397 j_errno
= journal_errno(journal
);
2401 errstr
= ext3_decode_error(sb
, j_errno
, nbuf
);
2402 ext3_warning(sb
, __func__
, "Filesystem error recorded "
2403 "from previous mount: %s", errstr
);
2404 ext3_warning(sb
, __func__
, "Marking fs in need of "
2405 "filesystem check.");
2407 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
2408 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
2409 ext3_commit_super (sb
, es
, 1);
2411 journal_clear_err(journal
);
2416 * Force the running and committing transactions to commit,
2417 * and wait on the commit.
2419 int ext3_force_commit(struct super_block
*sb
)
2424 if (sb
->s_flags
& MS_RDONLY
)
2427 journal
= EXT3_SB(sb
)->s_journal
;
2428 ret
= ext3_journal_force_commit(journal
);
2432 static int ext3_sync_fs(struct super_block
*sb
, int wait
)
2436 if (journal_start_commit(EXT3_SB(sb
)->s_journal
, &target
)) {
2438 log_wait_commit(EXT3_SB(sb
)->s_journal
, target
);
2444 * LVM calls this function before a (read-only) snapshot is created. This
2445 * gives us a chance to flush the journal completely and mark the fs clean.
2447 static int ext3_freeze(struct super_block
*sb
)
2452 if (!(sb
->s_flags
& MS_RDONLY
)) {
2453 journal
= EXT3_SB(sb
)->s_journal
;
2455 /* Now we set up the journal barrier. */
2456 journal_lock_updates(journal
);
2459 * We don't want to clear needs_recovery flag when we failed
2460 * to flush the journal.
2462 error
= journal_flush(journal
);
2466 /* Journal blocked and flushed, clear needs_recovery flag. */
2467 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2468 error
= ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2475 journal_unlock_updates(journal
);
2480 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2481 * flag here, even though the filesystem is not technically dirty yet.
2483 static int ext3_unfreeze(struct super_block
*sb
)
2485 if (!(sb
->s_flags
& MS_RDONLY
)) {
2487 /* Reser the needs_recovery flag before the fs is unlocked. */
2488 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2489 ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2491 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2496 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
)
2498 struct ext3_super_block
* es
;
2499 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2500 ext3_fsblk_t n_blocks_count
= 0;
2501 unsigned long old_sb_flags
;
2502 struct ext3_mount_options old_opts
;
2510 /* Store the original options */
2512 old_sb_flags
= sb
->s_flags
;
2513 old_opts
.s_mount_opt
= sbi
->s_mount_opt
;
2514 old_opts
.s_resuid
= sbi
->s_resuid
;
2515 old_opts
.s_resgid
= sbi
->s_resgid
;
2516 old_opts
.s_commit_interval
= sbi
->s_commit_interval
;
2518 old_opts
.s_jquota_fmt
= sbi
->s_jquota_fmt
;
2519 for (i
= 0; i
< MAXQUOTAS
; i
++)
2520 old_opts
.s_qf_names
[i
] = sbi
->s_qf_names
[i
];
2524 * Allow the "check" option to be passed as a remount option.
2526 if (!parse_options(data
, sb
, NULL
, NULL
, &n_blocks_count
, 1)) {
2531 if (sbi
->s_mount_opt
& EXT3_MOUNT_ABORT
)
2532 ext3_abort(sb
, __func__
, "Abort forced by user");
2534 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
2535 ((sbi
->s_mount_opt
& EXT3_MOUNT_POSIX_ACL
) ? MS_POSIXACL
: 0);
2539 ext3_init_journal_params(sb
, sbi
->s_journal
);
2541 if ((*flags
& MS_RDONLY
) != (sb
->s_flags
& MS_RDONLY
) ||
2542 n_blocks_count
> le32_to_cpu(es
->s_blocks_count
)) {
2543 if (sbi
->s_mount_opt
& EXT3_MOUNT_ABORT
) {
2548 if (*flags
& MS_RDONLY
) {
2550 * First of all, the unconditional stuff we have to do
2551 * to disable replay of the journal when we next remount
2553 sb
->s_flags
|= MS_RDONLY
;
2556 * OK, test if we are remounting a valid rw partition
2557 * readonly, and if so set the rdonly flag and then
2558 * mark the partition as valid again.
2560 if (!(es
->s_state
& cpu_to_le16(EXT3_VALID_FS
)) &&
2561 (sbi
->s_mount_state
& EXT3_VALID_FS
))
2562 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
2565 * We have to unlock super so that we can wait for
2569 ext3_mark_recovery_complete(sb
, es
);
2573 if ((ret
= EXT3_HAS_RO_COMPAT_FEATURE(sb
,
2574 ~EXT3_FEATURE_RO_COMPAT_SUPP
))) {
2575 printk(KERN_WARNING
"EXT3-fs: %s: couldn't "
2576 "remount RDWR because of unsupported "
2577 "optional features (%x).\n",
2578 sb
->s_id
, le32_to_cpu(ret
));
2584 * If we have an unprocessed orphan list hanging
2585 * around from a previously readonly bdev mount,
2586 * require a full umount/remount for now.
2588 if (es
->s_last_orphan
) {
2589 printk(KERN_WARNING
"EXT3-fs: %s: couldn't "
2590 "remount RDWR because of unprocessed "
2591 "orphan inode list. Please "
2592 "umount/remount instead.\n",
2599 * Mounting a RDONLY partition read-write, so reread
2600 * and store the current valid flag. (It may have
2601 * been changed by e2fsck since we originally mounted
2604 ext3_clear_journal_err(sb
, es
);
2605 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
2606 if ((err
= ext3_group_extend(sb
, es
, n_blocks_count
)))
2608 if (!ext3_setup_super (sb
, es
, 0))
2609 sb
->s_flags
&= ~MS_RDONLY
;
2613 /* Release old quota file names */
2614 for (i
= 0; i
< MAXQUOTAS
; i
++)
2615 if (old_opts
.s_qf_names
[i
] &&
2616 old_opts
.s_qf_names
[i
] != sbi
->s_qf_names
[i
])
2617 kfree(old_opts
.s_qf_names
[i
]);
2623 sb
->s_flags
= old_sb_flags
;
2624 sbi
->s_mount_opt
= old_opts
.s_mount_opt
;
2625 sbi
->s_resuid
= old_opts
.s_resuid
;
2626 sbi
->s_resgid
= old_opts
.s_resgid
;
2627 sbi
->s_commit_interval
= old_opts
.s_commit_interval
;
2629 sbi
->s_jquota_fmt
= old_opts
.s_jquota_fmt
;
2630 for (i
= 0; i
< MAXQUOTAS
; i
++) {
2631 if (sbi
->s_qf_names
[i
] &&
2632 old_opts
.s_qf_names
[i
] != sbi
->s_qf_names
[i
])
2633 kfree(sbi
->s_qf_names
[i
]);
2634 sbi
->s_qf_names
[i
] = old_opts
.s_qf_names
[i
];
2642 static int ext3_statfs (struct dentry
* dentry
, struct kstatfs
* buf
)
2644 struct super_block
*sb
= dentry
->d_sb
;
2645 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2646 struct ext3_super_block
*es
= sbi
->s_es
;
2649 if (test_opt(sb
, MINIX_DF
)) {
2650 sbi
->s_overhead_last
= 0;
2651 } else if (sbi
->s_blocks_last
!= le32_to_cpu(es
->s_blocks_count
)) {
2652 unsigned long ngroups
= sbi
->s_groups_count
, i
;
2653 ext3_fsblk_t overhead
= 0;
2657 * Compute the overhead (FS structures). This is constant
2658 * for a given filesystem unless the number of block groups
2659 * changes so we cache the previous value until it does.
2663 * All of the blocks before first_data_block are
2666 overhead
= le32_to_cpu(es
->s_first_data_block
);
2669 * Add the overhead attributed to the superblock and
2670 * block group descriptors. If the sparse superblocks
2671 * feature is turned on, then not all groups have this.
2673 for (i
= 0; i
< ngroups
; i
++) {
2674 overhead
+= ext3_bg_has_super(sb
, i
) +
2675 ext3_bg_num_gdb(sb
, i
);
2680 * Every block group has an inode bitmap, a block
2681 * bitmap, and an inode table.
2683 overhead
+= ngroups
* (2 + sbi
->s_itb_per_group
);
2684 sbi
->s_overhead_last
= overhead
;
2686 sbi
->s_blocks_last
= le32_to_cpu(es
->s_blocks_count
);
2689 buf
->f_type
= EXT3_SUPER_MAGIC
;
2690 buf
->f_bsize
= sb
->s_blocksize
;
2691 buf
->f_blocks
= le32_to_cpu(es
->s_blocks_count
) - sbi
->s_overhead_last
;
2692 buf
->f_bfree
= percpu_counter_sum_positive(&sbi
->s_freeblocks_counter
);
2693 buf
->f_bavail
= buf
->f_bfree
- le32_to_cpu(es
->s_r_blocks_count
);
2694 if (buf
->f_bfree
< le32_to_cpu(es
->s_r_blocks_count
))
2696 buf
->f_files
= le32_to_cpu(es
->s_inodes_count
);
2697 buf
->f_ffree
= percpu_counter_sum_positive(&sbi
->s_freeinodes_counter
);
2698 buf
->f_namelen
= EXT3_NAME_LEN
;
2699 fsid
= le64_to_cpup((void *)es
->s_uuid
) ^
2700 le64_to_cpup((void *)es
->s_uuid
+ sizeof(u64
));
2701 buf
->f_fsid
.val
[0] = fsid
& 0xFFFFFFFFUL
;
2702 buf
->f_fsid
.val
[1] = (fsid
>> 32) & 0xFFFFFFFFUL
;
2706 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2707 * is locked for write. Otherwise the are possible deadlocks:
2708 * Process 1 Process 2
2709 * ext3_create() quota_sync()
2710 * journal_start() write_dquot()
2711 * vfs_dq_init() down(dqio_mutex)
2712 * down(dqio_mutex) journal_start()
2718 static inline struct inode
*dquot_to_inode(struct dquot
*dquot
)
2720 return sb_dqopt(dquot
->dq_sb
)->files
[dquot
->dq_type
];
2723 static int ext3_write_dquot(struct dquot
*dquot
)
2727 struct inode
*inode
;
2729 inode
= dquot_to_inode(dquot
);
2730 handle
= ext3_journal_start(inode
,
2731 EXT3_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
2733 return PTR_ERR(handle
);
2734 ret
= dquot_commit(dquot
);
2735 err
= ext3_journal_stop(handle
);
2741 static int ext3_acquire_dquot(struct dquot
*dquot
)
2746 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2747 EXT3_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
2749 return PTR_ERR(handle
);
2750 ret
= dquot_acquire(dquot
);
2751 err
= ext3_journal_stop(handle
);
2757 static int ext3_release_dquot(struct dquot
*dquot
)
2762 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2763 EXT3_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
2764 if (IS_ERR(handle
)) {
2765 /* Release dquot anyway to avoid endless cycle in dqput() */
2766 dquot_release(dquot
);
2767 return PTR_ERR(handle
);
2769 ret
= dquot_release(dquot
);
2770 err
= ext3_journal_stop(handle
);
2776 static int ext3_mark_dquot_dirty(struct dquot
*dquot
)
2778 /* Are we journaling quotas? */
2779 if (EXT3_SB(dquot
->dq_sb
)->s_qf_names
[USRQUOTA
] ||
2780 EXT3_SB(dquot
->dq_sb
)->s_qf_names
[GRPQUOTA
]) {
2781 dquot_mark_dquot_dirty(dquot
);
2782 return ext3_write_dquot(dquot
);
2784 return dquot_mark_dquot_dirty(dquot
);
2788 static int ext3_write_info(struct super_block
*sb
, int type
)
2793 /* Data block + inode block */
2794 handle
= ext3_journal_start(sb
->s_root
->d_inode
, 2);
2796 return PTR_ERR(handle
);
2797 ret
= dquot_commit_info(sb
, type
);
2798 err
= ext3_journal_stop(handle
);
2805 * Turn on quotas during mount time - we need to find
2806 * the quota file and such...
2808 static int ext3_quota_on_mount(struct super_block
*sb
, int type
)
2810 return vfs_quota_on_mount(sb
, EXT3_SB(sb
)->s_qf_names
[type
],
2811 EXT3_SB(sb
)->s_jquota_fmt
, type
);
2815 * Standard function to be called on quota_on
2817 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
2818 char *name
, int remount
)
2823 if (!test_opt(sb
, QUOTA
))
2825 /* When remounting, no checks are needed and in fact, name is NULL */
2827 return vfs_quota_on(sb
, type
, format_id
, name
, remount
);
2829 err
= kern_path(name
, LOOKUP_FOLLOW
, &path
);
2833 /* Quotafile not on the same filesystem? */
2834 if (path
.mnt
->mnt_sb
!= sb
) {
2838 /* Journaling quota? */
2839 if (EXT3_SB(sb
)->s_qf_names
[type
]) {
2840 /* Quotafile not of fs root? */
2841 if (path
.dentry
->d_parent
!= sb
->s_root
)
2843 "EXT3-fs: Quota file not on filesystem root. "
2844 "Journaled quota will not work.\n");
2848 * When we journal data on quota file, we have to flush journal to see
2849 * all updates to the file when we bypass pagecache...
2851 if (ext3_should_journal_data(path
.dentry
->d_inode
)) {
2853 * We don't need to lock updates but journal_flush() could
2854 * otherwise be livelocked...
2856 journal_lock_updates(EXT3_SB(sb
)->s_journal
);
2857 err
= journal_flush(EXT3_SB(sb
)->s_journal
);
2858 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2865 err
= vfs_quota_on_path(sb
, type
, format_id
, &path
);
2870 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2871 * acquiring the locks... As quota files are never truncated and quota code
2872 * itself serializes the operations (and noone else should touch the files)
2873 * we don't have to be afraid of races */
2874 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
2875 size_t len
, loff_t off
)
2877 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2878 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2880 int offset
= off
& (sb
->s_blocksize
- 1);
2883 struct buffer_head
*bh
;
2884 loff_t i_size
= i_size_read(inode
);
2888 if (off
+len
> i_size
)
2891 while (toread
> 0) {
2892 tocopy
= sb
->s_blocksize
- offset
< toread
?
2893 sb
->s_blocksize
- offset
: toread
;
2894 bh
= ext3_bread(NULL
, inode
, blk
, 0, &err
);
2897 if (!bh
) /* A hole? */
2898 memset(data
, 0, tocopy
);
2900 memcpy(data
, bh
->b_data
+offset
, tocopy
);
2910 /* Write to quotafile (we know the transaction is already started and has
2911 * enough credits) */
2912 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
2913 const char *data
, size_t len
, loff_t off
)
2915 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2916 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2918 int offset
= off
& (sb
->s_blocksize
- 1);
2920 int journal_quota
= EXT3_SB(sb
)->s_qf_names
[type
] != NULL
;
2921 size_t towrite
= len
;
2922 struct buffer_head
*bh
;
2923 handle_t
*handle
= journal_current_handle();
2926 printk(KERN_WARNING
"EXT3-fs: Quota write (off=%Lu, len=%Lu)"
2927 " cancelled because transaction is not started.\n",
2928 (unsigned long long)off
, (unsigned long long)len
);
2931 mutex_lock_nested(&inode
->i_mutex
, I_MUTEX_QUOTA
);
2932 while (towrite
> 0) {
2933 tocopy
= sb
->s_blocksize
- offset
< towrite
?
2934 sb
->s_blocksize
- offset
: towrite
;
2935 bh
= ext3_bread(handle
, inode
, blk
, 1, &err
);
2938 if (journal_quota
) {
2939 err
= ext3_journal_get_write_access(handle
, bh
);
2946 memcpy(bh
->b_data
+offset
, data
, tocopy
);
2947 flush_dcache_page(bh
->b_page
);
2950 err
= ext3_journal_dirty_metadata(handle
, bh
);
2952 /* Always do at least ordered writes for quotas */
2953 err
= ext3_journal_dirty_data(handle
, bh
);
2954 mark_buffer_dirty(bh
);
2965 if (len
== towrite
) {
2966 mutex_unlock(&inode
->i_mutex
);
2969 if (inode
->i_size
< off
+len
-towrite
) {
2970 i_size_write(inode
, off
+len
-towrite
);
2971 EXT3_I(inode
)->i_disksize
= inode
->i_size
;
2974 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
2975 ext3_mark_inode_dirty(handle
, inode
);
2976 mutex_unlock(&inode
->i_mutex
);
2977 return len
- towrite
;
2982 static int ext3_get_sb(struct file_system_type
*fs_type
,
2983 int flags
, const char *dev_name
, void *data
, struct vfsmount
*mnt
)
2985 return get_sb_bdev(fs_type
, flags
, dev_name
, data
, ext3_fill_super
, mnt
);
2988 static struct file_system_type ext3_fs_type
= {
2989 .owner
= THIS_MODULE
,
2991 .get_sb
= ext3_get_sb
,
2992 .kill_sb
= kill_block_super
,
2993 .fs_flags
= FS_REQUIRES_DEV
,
2996 static int __init
init_ext3_fs(void)
2998 int err
= init_ext3_xattr();
3001 err
= init_inodecache();
3004 err
= register_filesystem(&ext3_fs_type
);
3009 destroy_inodecache();
3015 static void __exit
exit_ext3_fs(void)
3017 unregister_filesystem(&ext3_fs_type
);
3018 destroy_inodecache();
3022 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3023 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3024 MODULE_LICENSE("GPL");
3025 module_init(init_ext3_fs
)
3026 module_exit(exit_ext3_fs
)