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 static int ext3_load_journal(struct super_block
*, struct ext3_super_block
*,
48 unsigned long journal_devnum
);
49 static int ext3_create_journal(struct super_block
*, struct ext3_super_block
*,
51 static void ext3_commit_super (struct super_block
* sb
,
52 struct ext3_super_block
* es
,
54 static void ext3_mark_recovery_complete(struct super_block
* sb
,
55 struct ext3_super_block
* es
);
56 static void ext3_clear_journal_err(struct super_block
* sb
,
57 struct ext3_super_block
* es
);
58 static int ext3_sync_fs(struct super_block
*sb
, int wait
);
59 static const char *ext3_decode_error(struct super_block
* sb
, int errno
,
61 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
);
62 static int ext3_statfs (struct dentry
* dentry
, struct kstatfs
* buf
);
63 static void ext3_unlockfs(struct super_block
*sb
);
64 static void ext3_write_super (struct super_block
* sb
);
65 static void ext3_write_super_lockfs(struct super_block
*sb
);
68 * Wrappers for journal_start/end.
70 * The only special thing we need to do here is to make sure that all
71 * journal_end calls result in the superblock being marked dirty, so
72 * that sync() will call the filesystem's write_super callback if
75 handle_t
*ext3_journal_start_sb(struct super_block
*sb
, int nblocks
)
79 if (sb
->s_flags
& MS_RDONLY
)
80 return ERR_PTR(-EROFS
);
82 /* Special case here: if the journal has aborted behind our
83 * backs (eg. EIO in the commit thread), then we still need to
84 * take the FS itself readonly cleanly. */
85 journal
= EXT3_SB(sb
)->s_journal
;
86 if (is_journal_aborted(journal
)) {
87 ext3_abort(sb
, __func__
,
88 "Detected aborted journal");
89 return ERR_PTR(-EROFS
);
92 return journal_start(journal
, nblocks
);
96 * The only special thing we need to do here is to make sure that all
97 * journal_stop calls result in the superblock being marked dirty, so
98 * that sync() will call the filesystem's write_super callback if
101 int __ext3_journal_stop(const char *where
, handle_t
*handle
)
103 struct super_block
*sb
;
107 sb
= handle
->h_transaction
->t_journal
->j_private
;
109 rc
= journal_stop(handle
);
114 __ext3_std_error(sb
, where
, err
);
118 void ext3_journal_abort_handle(const char *caller
, const char *err_fn
,
119 struct buffer_head
*bh
, handle_t
*handle
, int err
)
122 const char *errstr
= ext3_decode_error(NULL
, err
, nbuf
);
125 BUFFER_TRACE(bh
, "abort");
130 if (is_handle_aborted(handle
))
133 printk(KERN_ERR
"%s: aborting transaction: %s in %s\n",
134 caller
, errstr
, err_fn
);
136 journal_abort_handle(handle
);
139 /* Deal with the reporting of failure conditions on a filesystem such as
140 * inconsistencies detected or read IO failures.
142 * On ext2, we can store the error state of the filesystem in the
143 * superblock. That is not possible on ext3, because we may have other
144 * write ordering constraints on the superblock which prevent us from
145 * writing it out straight away; and given that the journal is about to
146 * be aborted, we can't rely on the current, or future, transactions to
147 * write out the superblock safely.
149 * We'll just use the journal_abort() error code to record an error in
150 * the journal instead. On recovery, the journal will compain about
151 * that error until we've noted it down and cleared it.
154 static void ext3_handle_error(struct super_block
*sb
)
156 struct ext3_super_block
*es
= EXT3_SB(sb
)->s_es
;
158 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
159 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
161 if (sb
->s_flags
& MS_RDONLY
)
164 if (!test_opt (sb
, ERRORS_CONT
)) {
165 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
167 EXT3_SB(sb
)->s_mount_opt
|= EXT3_MOUNT_ABORT
;
169 journal_abort(journal
, -EIO
);
171 if (test_opt (sb
, ERRORS_RO
)) {
172 printk (KERN_CRIT
"Remounting filesystem read-only\n");
173 sb
->s_flags
|= MS_RDONLY
;
175 ext3_commit_super(sb
, es
, 1);
176 if (test_opt(sb
, ERRORS_PANIC
))
177 panic("EXT3-fs (device %s): panic forced after error\n",
181 void ext3_error (struct super_block
* sb
, const char * function
,
182 const char * fmt
, ...)
187 printk(KERN_CRIT
"EXT3-fs error (device %s): %s: ",sb
->s_id
, function
);
192 ext3_handle_error(sb
);
195 static const char *ext3_decode_error(struct super_block
* sb
, int errno
,
202 errstr
= "IO failure";
205 errstr
= "Out of memory";
208 if (!sb
|| EXT3_SB(sb
)->s_journal
->j_flags
& JFS_ABORT
)
209 errstr
= "Journal has aborted";
211 errstr
= "Readonly filesystem";
214 /* If the caller passed in an extra buffer for unknown
215 * errors, textualise them now. Else we just return
218 /* Check for truncated error codes... */
219 if (snprintf(nbuf
, 16, "error %d", -errno
) >= 0)
228 /* __ext3_std_error decodes expected errors from journaling functions
229 * automatically and invokes the appropriate error response. */
231 void __ext3_std_error (struct super_block
* sb
, const char * function
,
237 /* Special case: if the error is EROFS, and we're not already
238 * inside a transaction, then there's really no point in logging
240 if (errno
== -EROFS
&& journal_current_handle() == NULL
&&
241 (sb
->s_flags
& MS_RDONLY
))
244 errstr
= ext3_decode_error(sb
, errno
, nbuf
);
245 printk (KERN_CRIT
"EXT3-fs error (device %s) in %s: %s\n",
246 sb
->s_id
, function
, errstr
);
248 ext3_handle_error(sb
);
252 * ext3_abort is a much stronger failure handler than ext3_error. The
253 * abort function may be used to deal with unrecoverable failures such
254 * as journal IO errors or ENOMEM at a critical moment in log management.
256 * We unconditionally force the filesystem into an ABORT|READONLY state,
257 * unless the error response on the fs has been set to panic in which
258 * case we take the easy way out and panic immediately.
261 void ext3_abort (struct super_block
* sb
, const char * function
,
262 const char * fmt
, ...)
266 printk (KERN_CRIT
"ext3_abort called.\n");
269 printk(KERN_CRIT
"EXT3-fs error (device %s): %s: ",sb
->s_id
, function
);
274 if (test_opt(sb
, ERRORS_PANIC
))
275 panic("EXT3-fs panic from previous error\n");
277 if (sb
->s_flags
& MS_RDONLY
)
280 printk(KERN_CRIT
"Remounting filesystem read-only\n");
281 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
282 sb
->s_flags
|= MS_RDONLY
;
283 EXT3_SB(sb
)->s_mount_opt
|= EXT3_MOUNT_ABORT
;
284 if (EXT3_SB(sb
)->s_journal
)
285 journal_abort(EXT3_SB(sb
)->s_journal
, -EIO
);
288 void ext3_warning (struct super_block
* sb
, const char * function
,
289 const char * fmt
, ...)
294 printk(KERN_WARNING
"EXT3-fs warning (device %s): %s: ",
301 void ext3_update_dynamic_rev(struct super_block
*sb
)
303 struct ext3_super_block
*es
= EXT3_SB(sb
)->s_es
;
305 if (le32_to_cpu(es
->s_rev_level
) > EXT3_GOOD_OLD_REV
)
308 ext3_warning(sb
, __func__
,
309 "updating to rev %d because of new feature flag, "
310 "running e2fsck is recommended",
313 es
->s_first_ino
= cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO
);
314 es
->s_inode_size
= cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE
);
315 es
->s_rev_level
= cpu_to_le32(EXT3_DYNAMIC_REV
);
316 /* leave es->s_feature_*compat flags alone */
317 /* es->s_uuid will be set by e2fsck if empty */
320 * The rest of the superblock fields should be zero, and if not it
321 * means they are likely already in use, so leave them alone. We
322 * can leave it up to e2fsck to clean up any inconsistencies there.
327 * Open the external journal device
329 static struct block_device
*ext3_blkdev_get(dev_t dev
)
331 struct block_device
*bdev
;
332 char b
[BDEVNAME_SIZE
];
334 bdev
= open_by_devnum(dev
, FMODE_READ
|FMODE_WRITE
);
340 printk(KERN_ERR
"EXT3: failed to open journal device %s: %ld\n",
341 __bdevname(dev
, b
), PTR_ERR(bdev
));
346 * Release the journal device
348 static int ext3_blkdev_put(struct block_device
*bdev
)
351 return blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
);
354 static int ext3_blkdev_remove(struct ext3_sb_info
*sbi
)
356 struct block_device
*bdev
;
359 bdev
= sbi
->journal_bdev
;
361 ret
= ext3_blkdev_put(bdev
);
362 sbi
->journal_bdev
= NULL
;
367 static inline struct inode
*orphan_list_entry(struct list_head
*l
)
369 return &list_entry(l
, struct ext3_inode_info
, i_orphan
)->vfs_inode
;
372 static void dump_orphan_list(struct super_block
*sb
, struct ext3_sb_info
*sbi
)
376 printk(KERN_ERR
"sb orphan head is %d\n",
377 le32_to_cpu(sbi
->s_es
->s_last_orphan
));
379 printk(KERN_ERR
"sb_info orphan list:\n");
380 list_for_each(l
, &sbi
->s_orphan
) {
381 struct inode
*inode
= orphan_list_entry(l
);
383 "inode %s:%lu at %p: mode %o, nlink %d, next %d\n",
384 inode
->i_sb
->s_id
, inode
->i_ino
, inode
,
385 inode
->i_mode
, inode
->i_nlink
,
390 static void ext3_put_super (struct super_block
* sb
)
392 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
393 struct ext3_super_block
*es
= sbi
->s_es
;
396 ext3_xattr_put_super(sb
);
397 err
= journal_destroy(sbi
->s_journal
);
398 sbi
->s_journal
= NULL
;
400 ext3_abort(sb
, __func__
, "Couldn't clean up the journal");
402 if (!(sb
->s_flags
& MS_RDONLY
)) {
403 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
404 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
405 BUFFER_TRACE(sbi
->s_sbh
, "marking dirty");
406 mark_buffer_dirty(sbi
->s_sbh
);
407 ext3_commit_super(sb
, es
, 1);
410 for (i
= 0; i
< sbi
->s_gdb_count
; i
++)
411 brelse(sbi
->s_group_desc
[i
]);
412 kfree(sbi
->s_group_desc
);
413 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
414 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
415 percpu_counter_destroy(&sbi
->s_dirs_counter
);
418 for (i
= 0; i
< MAXQUOTAS
; i
++)
419 kfree(sbi
->s_qf_names
[i
]);
422 /* Debugging code just in case the in-memory inode orphan list
423 * isn't empty. The on-disk one can be non-empty if we've
424 * detected an error and taken the fs readonly, but the
425 * in-memory list had better be clean by this point. */
426 if (!list_empty(&sbi
->s_orphan
))
427 dump_orphan_list(sb
, sbi
);
428 J_ASSERT(list_empty(&sbi
->s_orphan
));
430 invalidate_bdev(sb
->s_bdev
);
431 if (sbi
->journal_bdev
&& sbi
->journal_bdev
!= sb
->s_bdev
) {
433 * Invalidate the journal device's buffers. We don't want them
434 * floating about in memory - the physical journal device may
435 * hotswapped, and it breaks the `ro-after' testing code.
437 sync_blockdev(sbi
->journal_bdev
);
438 invalidate_bdev(sbi
->journal_bdev
);
439 ext3_blkdev_remove(sbi
);
441 sb
->s_fs_info
= NULL
;
446 static struct kmem_cache
*ext3_inode_cachep
;
449 * Called inside transaction, so use GFP_NOFS
451 static struct inode
*ext3_alloc_inode(struct super_block
*sb
)
453 struct ext3_inode_info
*ei
;
455 ei
= kmem_cache_alloc(ext3_inode_cachep
, GFP_NOFS
);
458 #ifdef CONFIG_EXT3_FS_POSIX_ACL
459 ei
->i_acl
= EXT3_ACL_NOT_CACHED
;
460 ei
->i_default_acl
= EXT3_ACL_NOT_CACHED
;
462 ei
->i_block_alloc_info
= NULL
;
463 ei
->vfs_inode
.i_version
= 1;
464 return &ei
->vfs_inode
;
467 static void ext3_destroy_inode(struct inode
*inode
)
469 if (!list_empty(&(EXT3_I(inode
)->i_orphan
))) {
470 printk("EXT3 Inode %p: orphan list check failed!\n",
472 print_hex_dump(KERN_INFO
, "", DUMP_PREFIX_ADDRESS
, 16, 4,
473 EXT3_I(inode
), sizeof(struct ext3_inode_info
),
477 kmem_cache_free(ext3_inode_cachep
, EXT3_I(inode
));
480 static void init_once(void *foo
)
482 struct ext3_inode_info
*ei
= (struct ext3_inode_info
*) foo
;
484 INIT_LIST_HEAD(&ei
->i_orphan
);
485 #ifdef CONFIG_EXT3_FS_XATTR
486 init_rwsem(&ei
->xattr_sem
);
488 mutex_init(&ei
->truncate_mutex
);
489 inode_init_once(&ei
->vfs_inode
);
492 static int init_inodecache(void)
494 ext3_inode_cachep
= kmem_cache_create("ext3_inode_cache",
495 sizeof(struct ext3_inode_info
),
496 0, (SLAB_RECLAIM_ACCOUNT
|
499 if (ext3_inode_cachep
== NULL
)
504 static void destroy_inodecache(void)
506 kmem_cache_destroy(ext3_inode_cachep
);
509 static void ext3_clear_inode(struct inode
*inode
)
511 struct ext3_block_alloc_info
*rsv
= EXT3_I(inode
)->i_block_alloc_info
;
512 #ifdef CONFIG_EXT3_FS_POSIX_ACL
513 if (EXT3_I(inode
)->i_acl
&&
514 EXT3_I(inode
)->i_acl
!= EXT3_ACL_NOT_CACHED
) {
515 posix_acl_release(EXT3_I(inode
)->i_acl
);
516 EXT3_I(inode
)->i_acl
= EXT3_ACL_NOT_CACHED
;
518 if (EXT3_I(inode
)->i_default_acl
&&
519 EXT3_I(inode
)->i_default_acl
!= EXT3_ACL_NOT_CACHED
) {
520 posix_acl_release(EXT3_I(inode
)->i_default_acl
);
521 EXT3_I(inode
)->i_default_acl
= EXT3_ACL_NOT_CACHED
;
524 ext3_discard_reservation(inode
);
525 EXT3_I(inode
)->i_block_alloc_info
= NULL
;
530 static inline void ext3_show_quota_options(struct seq_file
*seq
, struct super_block
*sb
)
532 #if defined(CONFIG_QUOTA)
533 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
535 if (sbi
->s_jquota_fmt
)
536 seq_printf(seq
, ",jqfmt=%s",
537 (sbi
->s_jquota_fmt
== QFMT_VFS_OLD
) ? "vfsold": "vfsv0");
539 if (sbi
->s_qf_names
[USRQUOTA
])
540 seq_printf(seq
, ",usrjquota=%s", sbi
->s_qf_names
[USRQUOTA
]);
542 if (sbi
->s_qf_names
[GRPQUOTA
])
543 seq_printf(seq
, ",grpjquota=%s", sbi
->s_qf_names
[GRPQUOTA
]);
545 if (sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
)
546 seq_puts(seq
, ",usrquota");
548 if (sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
)
549 seq_puts(seq
, ",grpquota");
555 * - it's set to a non-default value OR
556 * - if the per-sb default is different from the global default
558 static int ext3_show_options(struct seq_file
*seq
, struct vfsmount
*vfs
)
560 struct super_block
*sb
= vfs
->mnt_sb
;
561 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
562 struct ext3_super_block
*es
= sbi
->s_es
;
563 unsigned long def_mount_opts
;
565 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
567 if (sbi
->s_sb_block
!= 1)
568 seq_printf(seq
, ",sb=%lu", sbi
->s_sb_block
);
569 if (test_opt(sb
, MINIX_DF
))
570 seq_puts(seq
, ",minixdf");
571 if (test_opt(sb
, GRPID
))
572 seq_puts(seq
, ",grpid");
573 if (!test_opt(sb
, GRPID
) && (def_mount_opts
& EXT3_DEFM_BSDGROUPS
))
574 seq_puts(seq
, ",nogrpid");
575 if (sbi
->s_resuid
!= EXT3_DEF_RESUID
||
576 le16_to_cpu(es
->s_def_resuid
) != EXT3_DEF_RESUID
) {
577 seq_printf(seq
, ",resuid=%u", sbi
->s_resuid
);
579 if (sbi
->s_resgid
!= EXT3_DEF_RESGID
||
580 le16_to_cpu(es
->s_def_resgid
) != EXT3_DEF_RESGID
) {
581 seq_printf(seq
, ",resgid=%u", sbi
->s_resgid
);
583 if (test_opt(sb
, ERRORS_RO
)) {
584 int def_errors
= le16_to_cpu(es
->s_errors
);
586 if (def_errors
== EXT3_ERRORS_PANIC
||
587 def_errors
== EXT3_ERRORS_CONTINUE
) {
588 seq_puts(seq
, ",errors=remount-ro");
591 if (test_opt(sb
, ERRORS_CONT
))
592 seq_puts(seq
, ",errors=continue");
593 if (test_opt(sb
, ERRORS_PANIC
))
594 seq_puts(seq
, ",errors=panic");
595 if (test_opt(sb
, NO_UID32
))
596 seq_puts(seq
, ",nouid32");
597 if (test_opt(sb
, DEBUG
))
598 seq_puts(seq
, ",debug");
599 if (test_opt(sb
, OLDALLOC
))
600 seq_puts(seq
, ",oldalloc");
601 #ifdef CONFIG_EXT3_FS_XATTR
602 if (test_opt(sb
, XATTR_USER
))
603 seq_puts(seq
, ",user_xattr");
604 if (!test_opt(sb
, XATTR_USER
) &&
605 (def_mount_opts
& EXT3_DEFM_XATTR_USER
)) {
606 seq_puts(seq
, ",nouser_xattr");
609 #ifdef CONFIG_EXT3_FS_POSIX_ACL
610 if (test_opt(sb
, POSIX_ACL
))
611 seq_puts(seq
, ",acl");
612 if (!test_opt(sb
, POSIX_ACL
) && (def_mount_opts
& EXT3_DEFM_ACL
))
613 seq_puts(seq
, ",noacl");
615 if (!test_opt(sb
, RESERVATION
))
616 seq_puts(seq
, ",noreservation");
617 if (sbi
->s_commit_interval
) {
618 seq_printf(seq
, ",commit=%u",
619 (unsigned) (sbi
->s_commit_interval
/ HZ
));
621 if (test_opt(sb
, BARRIER
))
622 seq_puts(seq
, ",barrier=1");
623 if (test_opt(sb
, NOBH
))
624 seq_puts(seq
, ",nobh");
626 if (test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_JOURNAL_DATA
)
627 seq_puts(seq
, ",data=journal");
628 else if (test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_ORDERED_DATA
)
629 seq_puts(seq
, ",data=ordered");
630 else if (test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_WRITEBACK_DATA
)
631 seq_puts(seq
, ",data=writeback");
633 if (test_opt(sb
, DATA_ERR_ABORT
))
634 seq_puts(seq
, ",data_err=abort");
636 ext3_show_quota_options(seq
, sb
);
642 static struct inode
*ext3_nfs_get_inode(struct super_block
*sb
,
643 u64 ino
, u32 generation
)
647 if (ino
< EXT3_FIRST_INO(sb
) && ino
!= EXT3_ROOT_INO
)
648 return ERR_PTR(-ESTALE
);
649 if (ino
> le32_to_cpu(EXT3_SB(sb
)->s_es
->s_inodes_count
))
650 return ERR_PTR(-ESTALE
);
652 /* iget isn't really right if the inode is currently unallocated!!
654 * ext3_read_inode will return a bad_inode if the inode had been
655 * deleted, so we should be safe.
657 * Currently we don't know the generation for parent directory, so
658 * a generation of 0 means "accept any"
660 inode
= ext3_iget(sb
, ino
);
662 return ERR_CAST(inode
);
663 if (generation
&& inode
->i_generation
!= generation
) {
665 return ERR_PTR(-ESTALE
);
671 static struct dentry
*ext3_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
672 int fh_len
, int fh_type
)
674 return generic_fh_to_dentry(sb
, fid
, fh_len
, fh_type
,
678 static struct dentry
*ext3_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
679 int fh_len
, int fh_type
)
681 return generic_fh_to_parent(sb
, fid
, fh_len
, fh_type
,
686 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
687 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
689 static int ext3_dquot_initialize(struct inode
*inode
, int type
);
690 static int ext3_dquot_drop(struct inode
*inode
);
691 static int ext3_write_dquot(struct dquot
*dquot
);
692 static int ext3_acquire_dquot(struct dquot
*dquot
);
693 static int ext3_release_dquot(struct dquot
*dquot
);
694 static int ext3_mark_dquot_dirty(struct dquot
*dquot
);
695 static int ext3_write_info(struct super_block
*sb
, int type
);
696 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
697 char *path
, int remount
);
698 static int ext3_quota_on_mount(struct super_block
*sb
, int type
);
699 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
700 size_t len
, loff_t off
);
701 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
702 const char *data
, size_t len
, loff_t off
);
704 static struct dquot_operations ext3_quota_operations
= {
705 .initialize
= ext3_dquot_initialize
,
706 .drop
= ext3_dquot_drop
,
707 .alloc_space
= dquot_alloc_space
,
708 .alloc_inode
= dquot_alloc_inode
,
709 .free_space
= dquot_free_space
,
710 .free_inode
= dquot_free_inode
,
711 .transfer
= dquot_transfer
,
712 .write_dquot
= ext3_write_dquot
,
713 .acquire_dquot
= ext3_acquire_dquot
,
714 .release_dquot
= ext3_release_dquot
,
715 .mark_dirty
= ext3_mark_dquot_dirty
,
716 .write_info
= ext3_write_info
,
717 .alloc_dquot
= dquot_alloc
,
718 .destroy_dquot
= dquot_destroy
,
721 static struct quotactl_ops ext3_qctl_operations
= {
722 .quota_on
= ext3_quota_on
,
723 .quota_off
= vfs_quota_off
,
724 .quota_sync
= vfs_quota_sync
,
725 .get_info
= vfs_get_dqinfo
,
726 .set_info
= vfs_set_dqinfo
,
727 .get_dqblk
= vfs_get_dqblk
,
728 .set_dqblk
= vfs_set_dqblk
732 static const struct super_operations ext3_sops
= {
733 .alloc_inode
= ext3_alloc_inode
,
734 .destroy_inode
= ext3_destroy_inode
,
735 .write_inode
= ext3_write_inode
,
736 .dirty_inode
= ext3_dirty_inode
,
737 .delete_inode
= ext3_delete_inode
,
738 .put_super
= ext3_put_super
,
739 .write_super
= ext3_write_super
,
740 .sync_fs
= ext3_sync_fs
,
741 .write_super_lockfs
= ext3_write_super_lockfs
,
742 .unlockfs
= ext3_unlockfs
,
743 .statfs
= ext3_statfs
,
744 .remount_fs
= ext3_remount
,
745 .clear_inode
= ext3_clear_inode
,
746 .show_options
= ext3_show_options
,
748 .quota_read
= ext3_quota_read
,
749 .quota_write
= ext3_quota_write
,
753 static const struct export_operations ext3_export_ops
= {
754 .fh_to_dentry
= ext3_fh_to_dentry
,
755 .fh_to_parent
= ext3_fh_to_parent
,
756 .get_parent
= ext3_get_parent
,
760 Opt_bsd_df
, Opt_minix_df
, Opt_grpid
, Opt_nogrpid
,
761 Opt_resgid
, Opt_resuid
, Opt_sb
, Opt_err_cont
, Opt_err_panic
, Opt_err_ro
,
762 Opt_nouid32
, Opt_nocheck
, Opt_debug
, Opt_oldalloc
, Opt_orlov
,
763 Opt_user_xattr
, Opt_nouser_xattr
, Opt_acl
, Opt_noacl
,
764 Opt_reservation
, Opt_noreservation
, Opt_noload
, Opt_nobh
, Opt_bh
,
765 Opt_commit
, Opt_journal_update
, Opt_journal_inum
, Opt_journal_dev
,
766 Opt_abort
, Opt_data_journal
, Opt_data_ordered
, Opt_data_writeback
,
767 Opt_data_err_abort
, Opt_data_err_ignore
,
768 Opt_usrjquota
, Opt_grpjquota
, Opt_offusrjquota
, Opt_offgrpjquota
,
769 Opt_jqfmt_vfsold
, Opt_jqfmt_vfsv0
, Opt_quota
, Opt_noquota
,
770 Opt_ignore
, Opt_barrier
, Opt_err
, Opt_resize
, Opt_usrquota
,
774 static const match_table_t tokens
= {
775 {Opt_bsd_df
, "bsddf"},
776 {Opt_minix_df
, "minixdf"},
777 {Opt_grpid
, "grpid"},
778 {Opt_grpid
, "bsdgroups"},
779 {Opt_nogrpid
, "nogrpid"},
780 {Opt_nogrpid
, "sysvgroups"},
781 {Opt_resgid
, "resgid=%u"},
782 {Opt_resuid
, "resuid=%u"},
784 {Opt_err_cont
, "errors=continue"},
785 {Opt_err_panic
, "errors=panic"},
786 {Opt_err_ro
, "errors=remount-ro"},
787 {Opt_nouid32
, "nouid32"},
788 {Opt_nocheck
, "nocheck"},
789 {Opt_nocheck
, "check=none"},
790 {Opt_debug
, "debug"},
791 {Opt_oldalloc
, "oldalloc"},
792 {Opt_orlov
, "orlov"},
793 {Opt_user_xattr
, "user_xattr"},
794 {Opt_nouser_xattr
, "nouser_xattr"},
796 {Opt_noacl
, "noacl"},
797 {Opt_reservation
, "reservation"},
798 {Opt_noreservation
, "noreservation"},
799 {Opt_noload
, "noload"},
802 {Opt_commit
, "commit=%u"},
803 {Opt_journal_update
, "journal=update"},
804 {Opt_journal_inum
, "journal=%u"},
805 {Opt_journal_dev
, "journal_dev=%u"},
806 {Opt_abort
, "abort"},
807 {Opt_data_journal
, "data=journal"},
808 {Opt_data_ordered
, "data=ordered"},
809 {Opt_data_writeback
, "data=writeback"},
810 {Opt_data_err_abort
, "data_err=abort"},
811 {Opt_data_err_ignore
, "data_err=ignore"},
812 {Opt_offusrjquota
, "usrjquota="},
813 {Opt_usrjquota
, "usrjquota=%s"},
814 {Opt_offgrpjquota
, "grpjquota="},
815 {Opt_grpjquota
, "grpjquota=%s"},
816 {Opt_jqfmt_vfsold
, "jqfmt=vfsold"},
817 {Opt_jqfmt_vfsv0
, "jqfmt=vfsv0"},
818 {Opt_grpquota
, "grpquota"},
819 {Opt_noquota
, "noquota"},
820 {Opt_quota
, "quota"},
821 {Opt_usrquota
, "usrquota"},
822 {Opt_barrier
, "barrier=%u"},
823 {Opt_resize
, "resize"},
827 static ext3_fsblk_t
get_sb_block(void **data
)
829 ext3_fsblk_t sb_block
;
830 char *options
= (char *) *data
;
832 if (!options
|| strncmp(options
, "sb=", 3) != 0)
833 return 1; /* Default location */
835 /*todo: use simple_strtoll with >32bit ext3 */
836 sb_block
= simple_strtoul(options
, &options
, 0);
837 if (*options
&& *options
!= ',') {
838 printk("EXT3-fs: Invalid sb specification: %s\n",
844 *data
= (void *) options
;
848 static int parse_options (char *options
, struct super_block
*sb
,
849 unsigned int *inum
, unsigned long *journal_devnum
,
850 ext3_fsblk_t
*n_blocks_count
, int is_remount
)
852 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
854 substring_t args
[MAX_OPT_ARGS
];
865 while ((p
= strsep (&options
, ",")) != NULL
) {
870 token
= match_token(p
, tokens
, args
);
873 clear_opt (sbi
->s_mount_opt
, MINIX_DF
);
876 set_opt (sbi
->s_mount_opt
, MINIX_DF
);
879 set_opt (sbi
->s_mount_opt
, GRPID
);
882 clear_opt (sbi
->s_mount_opt
, GRPID
);
885 if (match_int(&args
[0], &option
))
887 sbi
->s_resuid
= option
;
890 if (match_int(&args
[0], &option
))
892 sbi
->s_resgid
= option
;
895 /* handled by get_sb_block() instead of here */
896 /* *sb_block = match_int(&args[0]); */
899 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
900 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
901 set_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
904 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
905 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
906 set_opt (sbi
->s_mount_opt
, ERRORS_RO
);
909 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
910 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
911 set_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
914 set_opt (sbi
->s_mount_opt
, NO_UID32
);
917 clear_opt (sbi
->s_mount_opt
, CHECK
);
920 set_opt (sbi
->s_mount_opt
, DEBUG
);
923 set_opt (sbi
->s_mount_opt
, OLDALLOC
);
926 clear_opt (sbi
->s_mount_opt
, OLDALLOC
);
928 #ifdef CONFIG_EXT3_FS_XATTR
930 set_opt (sbi
->s_mount_opt
, XATTR_USER
);
932 case Opt_nouser_xattr
:
933 clear_opt (sbi
->s_mount_opt
, XATTR_USER
);
937 case Opt_nouser_xattr
:
938 printk("EXT3 (no)user_xattr options not supported\n");
941 #ifdef CONFIG_EXT3_FS_POSIX_ACL
943 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
946 clear_opt(sbi
->s_mount_opt
, POSIX_ACL
);
951 printk("EXT3 (no)acl options not supported\n");
954 case Opt_reservation
:
955 set_opt(sbi
->s_mount_opt
, RESERVATION
);
957 case Opt_noreservation
:
958 clear_opt(sbi
->s_mount_opt
, RESERVATION
);
960 case Opt_journal_update
:
962 /* Eventually we will want to be able to create
963 a journal file here. For now, only allow the
964 user to specify an existing inode to be the
967 printk(KERN_ERR
"EXT3-fs: cannot specify "
968 "journal on remount\n");
971 set_opt (sbi
->s_mount_opt
, UPDATE_JOURNAL
);
973 case Opt_journal_inum
:
975 printk(KERN_ERR
"EXT3-fs: cannot specify "
976 "journal on remount\n");
979 if (match_int(&args
[0], &option
))
983 case Opt_journal_dev
:
985 printk(KERN_ERR
"EXT3-fs: cannot specify "
986 "journal on remount\n");
989 if (match_int(&args
[0], &option
))
991 *journal_devnum
= option
;
994 set_opt (sbi
->s_mount_opt
, NOLOAD
);
997 if (match_int(&args
[0], &option
))
1002 option
= JBD_DEFAULT_MAX_COMMIT_AGE
;
1003 sbi
->s_commit_interval
= HZ
* option
;
1005 case Opt_data_journal
:
1006 data_opt
= EXT3_MOUNT_JOURNAL_DATA
;
1008 case Opt_data_ordered
:
1009 data_opt
= EXT3_MOUNT_ORDERED_DATA
;
1011 case Opt_data_writeback
:
1012 data_opt
= EXT3_MOUNT_WRITEBACK_DATA
;
1015 if ((sbi
->s_mount_opt
& EXT3_MOUNT_DATA_FLAGS
)
1018 "EXT3-fs: cannot change data "
1019 "mode on remount\n");
1023 sbi
->s_mount_opt
&= ~EXT3_MOUNT_DATA_FLAGS
;
1024 sbi
->s_mount_opt
|= data_opt
;
1027 case Opt_data_err_abort
:
1028 set_opt(sbi
->s_mount_opt
, DATA_ERR_ABORT
);
1030 case Opt_data_err_ignore
:
1031 clear_opt(sbi
->s_mount_opt
, DATA_ERR_ABORT
);
1040 if (sb_any_quota_loaded(sb
) &&
1041 !sbi
->s_qf_names
[qtype
]) {
1043 "EXT3-fs: Cannot change journaled "
1044 "quota options when quota turned on.\n");
1047 qname
= match_strdup(&args
[0]);
1050 "EXT3-fs: not enough memory for "
1051 "storing quotafile name.\n");
1054 if (sbi
->s_qf_names
[qtype
] &&
1055 strcmp(sbi
->s_qf_names
[qtype
], qname
)) {
1057 "EXT3-fs: %s quota file already "
1058 "specified.\n", QTYPE2NAME(qtype
));
1062 sbi
->s_qf_names
[qtype
] = qname
;
1063 if (strchr(sbi
->s_qf_names
[qtype
], '/')) {
1065 "EXT3-fs: quotafile must be on "
1066 "filesystem root.\n");
1067 kfree(sbi
->s_qf_names
[qtype
]);
1068 sbi
->s_qf_names
[qtype
] = NULL
;
1071 set_opt(sbi
->s_mount_opt
, QUOTA
);
1073 case Opt_offusrjquota
:
1076 case Opt_offgrpjquota
:
1079 if (sb_any_quota_loaded(sb
) &&
1080 sbi
->s_qf_names
[qtype
]) {
1081 printk(KERN_ERR
"EXT3-fs: Cannot change "
1082 "journaled quota options when "
1083 "quota turned on.\n");
1087 * The space will be released later when all options
1088 * are confirmed to be correct
1090 sbi
->s_qf_names
[qtype
] = NULL
;
1092 case Opt_jqfmt_vfsold
:
1093 qfmt
= QFMT_VFS_OLD
;
1095 case Opt_jqfmt_vfsv0
:
1098 if (sb_any_quota_loaded(sb
) &&
1099 sbi
->s_jquota_fmt
!= qfmt
) {
1100 printk(KERN_ERR
"EXT3-fs: Cannot change "
1101 "journaled quota options when "
1102 "quota turned on.\n");
1105 sbi
->s_jquota_fmt
= qfmt
;
1109 set_opt(sbi
->s_mount_opt
, QUOTA
);
1110 set_opt(sbi
->s_mount_opt
, USRQUOTA
);
1113 set_opt(sbi
->s_mount_opt
, QUOTA
);
1114 set_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1117 if (sb_any_quota_loaded(sb
)) {
1118 printk(KERN_ERR
"EXT3-fs: Cannot change quota "
1119 "options when quota turned on.\n");
1122 clear_opt(sbi
->s_mount_opt
, QUOTA
);
1123 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1124 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1131 "EXT3-fs: quota options not supported.\n");
1135 case Opt_offusrjquota
:
1136 case Opt_offgrpjquota
:
1137 case Opt_jqfmt_vfsold
:
1138 case Opt_jqfmt_vfsv0
:
1140 "EXT3-fs: journaled quota options not "
1147 set_opt(sbi
->s_mount_opt
, ABORT
);
1150 if (match_int(&args
[0], &option
))
1153 set_opt(sbi
->s_mount_opt
, BARRIER
);
1155 clear_opt(sbi
->s_mount_opt
, BARRIER
);
1161 printk("EXT3-fs: resize option only available "
1165 if (match_int(&args
[0], &option
) != 0)
1167 *n_blocks_count
= option
;
1170 set_opt(sbi
->s_mount_opt
, NOBH
);
1173 clear_opt(sbi
->s_mount_opt
, NOBH
);
1177 "EXT3-fs: Unrecognized mount option \"%s\" "
1178 "or missing value\n", p
);
1183 if (sbi
->s_qf_names
[USRQUOTA
] || sbi
->s_qf_names
[GRPQUOTA
]) {
1184 if ((sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
) &&
1185 sbi
->s_qf_names
[USRQUOTA
])
1186 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1188 if ((sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
) &&
1189 sbi
->s_qf_names
[GRPQUOTA
])
1190 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1192 if ((sbi
->s_qf_names
[USRQUOTA
] &&
1193 (sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
)) ||
1194 (sbi
->s_qf_names
[GRPQUOTA
] &&
1195 (sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
))) {
1196 printk(KERN_ERR
"EXT3-fs: old and new quota "
1197 "format mixing.\n");
1201 if (!sbi
->s_jquota_fmt
) {
1202 printk(KERN_ERR
"EXT3-fs: journaled quota format "
1203 "not specified.\n");
1207 if (sbi
->s_jquota_fmt
) {
1208 printk(KERN_ERR
"EXT3-fs: journaled quota format "
1209 "specified with no journaling "
1218 static int ext3_setup_super(struct super_block
*sb
, struct ext3_super_block
*es
,
1221 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1224 if (le32_to_cpu(es
->s_rev_level
) > EXT3_MAX_SUPP_REV
) {
1225 printk (KERN_ERR
"EXT3-fs warning: revision level too high, "
1226 "forcing read-only mode\n");
1231 if (!(sbi
->s_mount_state
& EXT3_VALID_FS
))
1232 printk (KERN_WARNING
"EXT3-fs warning: mounting unchecked fs, "
1233 "running e2fsck is recommended\n");
1234 else if ((sbi
->s_mount_state
& EXT3_ERROR_FS
))
1235 printk (KERN_WARNING
1236 "EXT3-fs warning: mounting fs with errors, "
1237 "running e2fsck is recommended\n");
1238 else if ((__s16
) le16_to_cpu(es
->s_max_mnt_count
) >= 0 &&
1239 le16_to_cpu(es
->s_mnt_count
) >=
1240 (unsigned short) (__s16
) le16_to_cpu(es
->s_max_mnt_count
))
1241 printk (KERN_WARNING
1242 "EXT3-fs warning: maximal mount count reached, "
1243 "running e2fsck is recommended\n");
1244 else if (le32_to_cpu(es
->s_checkinterval
) &&
1245 (le32_to_cpu(es
->s_lastcheck
) +
1246 le32_to_cpu(es
->s_checkinterval
) <= get_seconds()))
1247 printk (KERN_WARNING
1248 "EXT3-fs warning: checktime reached, "
1249 "running e2fsck is recommended\n");
1251 /* @@@ We _will_ want to clear the valid bit if we find
1252 inconsistencies, to force a fsck at reboot. But for
1253 a plain journaled filesystem we can keep it set as
1254 valid forever! :) */
1255 es
->s_state
&= cpu_to_le16(~EXT3_VALID_FS
);
1257 if (!(__s16
) le16_to_cpu(es
->s_max_mnt_count
))
1258 es
->s_max_mnt_count
= cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT
);
1259 le16_add_cpu(&es
->s_mnt_count
, 1);
1260 es
->s_mtime
= cpu_to_le32(get_seconds());
1261 ext3_update_dynamic_rev(sb
);
1262 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
1264 ext3_commit_super(sb
, es
, 1);
1265 if (test_opt(sb
, DEBUG
))
1266 printk(KERN_INFO
"[EXT3 FS bs=%lu, gc=%lu, "
1267 "bpg=%lu, ipg=%lu, mo=%04lx]\n",
1269 sbi
->s_groups_count
,
1270 EXT3_BLOCKS_PER_GROUP(sb
),
1271 EXT3_INODES_PER_GROUP(sb
),
1274 printk(KERN_INFO
"EXT3 FS on %s, ", sb
->s_id
);
1275 if (EXT3_SB(sb
)->s_journal
->j_inode
== NULL
) {
1276 char b
[BDEVNAME_SIZE
];
1278 printk("external journal on %s\n",
1279 bdevname(EXT3_SB(sb
)->s_journal
->j_dev
, b
));
1281 printk("internal journal\n");
1286 /* Called at mount-time, super-block is locked */
1287 static int ext3_check_descriptors(struct super_block
*sb
)
1289 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1292 ext3_debug ("Checking group descriptors");
1294 for (i
= 0; i
< sbi
->s_groups_count
; i
++) {
1295 struct ext3_group_desc
*gdp
= ext3_get_group_desc(sb
, i
, NULL
);
1296 ext3_fsblk_t first_block
= ext3_group_first_block_no(sb
, i
);
1297 ext3_fsblk_t last_block
;
1299 if (i
== sbi
->s_groups_count
- 1)
1300 last_block
= le32_to_cpu(sbi
->s_es
->s_blocks_count
) - 1;
1302 last_block
= first_block
+
1303 (EXT3_BLOCKS_PER_GROUP(sb
) - 1);
1305 if (le32_to_cpu(gdp
->bg_block_bitmap
) < first_block
||
1306 le32_to_cpu(gdp
->bg_block_bitmap
) > last_block
)
1308 ext3_error (sb
, "ext3_check_descriptors",
1309 "Block bitmap for group %d"
1310 " not in group (block %lu)!",
1312 le32_to_cpu(gdp
->bg_block_bitmap
));
1315 if (le32_to_cpu(gdp
->bg_inode_bitmap
) < first_block
||
1316 le32_to_cpu(gdp
->bg_inode_bitmap
) > last_block
)
1318 ext3_error (sb
, "ext3_check_descriptors",
1319 "Inode bitmap for group %d"
1320 " not in group (block %lu)!",
1322 le32_to_cpu(gdp
->bg_inode_bitmap
));
1325 if (le32_to_cpu(gdp
->bg_inode_table
) < first_block
||
1326 le32_to_cpu(gdp
->bg_inode_table
) + sbi
->s_itb_per_group
- 1 >
1329 ext3_error (sb
, "ext3_check_descriptors",
1330 "Inode table for group %d"
1331 " not in group (block %lu)!",
1333 le32_to_cpu(gdp
->bg_inode_table
));
1338 sbi
->s_es
->s_free_blocks_count
=cpu_to_le32(ext3_count_free_blocks(sb
));
1339 sbi
->s_es
->s_free_inodes_count
=cpu_to_le32(ext3_count_free_inodes(sb
));
1344 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1345 * the superblock) which were deleted from all directories, but held open by
1346 * a process at the time of a crash. We walk the list and try to delete these
1347 * inodes at recovery time (only with a read-write filesystem).
1349 * In order to keep the orphan inode chain consistent during traversal (in
1350 * case of crash during recovery), we link each inode into the superblock
1351 * orphan list_head and handle it the same way as an inode deletion during
1352 * normal operation (which journals the operations for us).
1354 * We only do an iget() and an iput() on each inode, which is very safe if we
1355 * accidentally point at an in-use or already deleted inode. The worst that
1356 * can happen in this case is that we get a "bit already cleared" message from
1357 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1358 * e2fsck was run on this filesystem, and it must have already done the orphan
1359 * inode cleanup for us, so we can safely abort without any further action.
1361 static void ext3_orphan_cleanup (struct super_block
* sb
,
1362 struct ext3_super_block
* es
)
1364 unsigned int s_flags
= sb
->s_flags
;
1365 int nr_orphans
= 0, nr_truncates
= 0;
1369 if (!es
->s_last_orphan
) {
1370 jbd_debug(4, "no orphan inodes to clean up\n");
1374 if (bdev_read_only(sb
->s_bdev
)) {
1375 printk(KERN_ERR
"EXT3-fs: write access "
1376 "unavailable, skipping orphan cleanup.\n");
1380 if (EXT3_SB(sb
)->s_mount_state
& EXT3_ERROR_FS
) {
1381 if (es
->s_last_orphan
)
1382 jbd_debug(1, "Errors on filesystem, "
1383 "clearing orphan list.\n");
1384 es
->s_last_orphan
= 0;
1385 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1389 if (s_flags
& MS_RDONLY
) {
1390 printk(KERN_INFO
"EXT3-fs: %s: orphan cleanup on readonly fs\n",
1392 sb
->s_flags
&= ~MS_RDONLY
;
1395 /* Needed for iput() to work correctly and not trash data */
1396 sb
->s_flags
|= MS_ACTIVE
;
1397 /* Turn on quotas so that they are updated correctly */
1398 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1399 if (EXT3_SB(sb
)->s_qf_names
[i
]) {
1400 int ret
= ext3_quota_on_mount(sb
, i
);
1403 "EXT3-fs: Cannot turn on journaled "
1404 "quota: error %d\n", ret
);
1409 while (es
->s_last_orphan
) {
1410 struct inode
*inode
;
1412 inode
= ext3_orphan_get(sb
, le32_to_cpu(es
->s_last_orphan
));
1413 if (IS_ERR(inode
)) {
1414 es
->s_last_orphan
= 0;
1418 list_add(&EXT3_I(inode
)->i_orphan
, &EXT3_SB(sb
)->s_orphan
);
1420 if (inode
->i_nlink
) {
1422 "%s: truncating inode %lu to %Ld bytes\n",
1423 __func__
, inode
->i_ino
, inode
->i_size
);
1424 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1425 inode
->i_ino
, inode
->i_size
);
1426 ext3_truncate(inode
);
1430 "%s: deleting unreferenced inode %lu\n",
1431 __func__
, inode
->i_ino
);
1432 jbd_debug(2, "deleting unreferenced inode %lu\n",
1436 iput(inode
); /* The delete magic happens here! */
1439 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1442 printk(KERN_INFO
"EXT3-fs: %s: %d orphan inode%s deleted\n",
1443 sb
->s_id
, PLURAL(nr_orphans
));
1445 printk(KERN_INFO
"EXT3-fs: %s: %d truncate%s cleaned up\n",
1446 sb
->s_id
, PLURAL(nr_truncates
));
1448 /* Turn quotas off */
1449 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1450 if (sb_dqopt(sb
)->files
[i
])
1451 vfs_quota_off(sb
, i
, 0);
1454 sb
->s_flags
= s_flags
; /* Restore MS_RDONLY status */
1458 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1459 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1460 * We need to be 1 filesystem block less than the 2^32 sector limit.
1462 static loff_t
ext3_max_size(int bits
)
1464 loff_t res
= EXT3_NDIR_BLOCKS
;
1468 /* This is calculated to be the largest file size for a
1469 * dense, file such that the total number of
1470 * sectors in the file, including data and all indirect blocks,
1471 * does not exceed 2^32 -1
1472 * __u32 i_blocks representing the total number of
1473 * 512 bytes blocks of the file
1475 upper_limit
= (1LL << 32) - 1;
1477 /* total blocks in file system block size */
1478 upper_limit
>>= (bits
- 9);
1481 /* indirect blocks */
1483 /* double indirect blocks */
1484 meta_blocks
+= 1 + (1LL << (bits
-2));
1485 /* tripple indirect blocks */
1486 meta_blocks
+= 1 + (1LL << (bits
-2)) + (1LL << (2*(bits
-2)));
1488 upper_limit
-= meta_blocks
;
1489 upper_limit
<<= bits
;
1491 res
+= 1LL << (bits
-2);
1492 res
+= 1LL << (2*(bits
-2));
1493 res
+= 1LL << (3*(bits
-2));
1495 if (res
> upper_limit
)
1498 if (res
> MAX_LFS_FILESIZE
)
1499 res
= MAX_LFS_FILESIZE
;
1504 static ext3_fsblk_t
descriptor_loc(struct super_block
*sb
,
1505 ext3_fsblk_t logic_sb_block
,
1508 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1509 unsigned long bg
, first_meta_bg
;
1512 first_meta_bg
= le32_to_cpu(sbi
->s_es
->s_first_meta_bg
);
1514 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_META_BG
) ||
1516 return (logic_sb_block
+ nr
+ 1);
1517 bg
= sbi
->s_desc_per_block
* nr
;
1518 if (ext3_bg_has_super(sb
, bg
))
1520 return (has_super
+ ext3_group_first_block_no(sb
, bg
));
1524 static int ext3_fill_super (struct super_block
*sb
, void *data
, int silent
)
1526 struct buffer_head
* bh
;
1527 struct ext3_super_block
*es
= NULL
;
1528 struct ext3_sb_info
*sbi
;
1530 ext3_fsblk_t sb_block
= get_sb_block(&data
);
1531 ext3_fsblk_t logic_sb_block
;
1532 unsigned long offset
= 0;
1533 unsigned int journal_inum
= 0;
1534 unsigned long journal_devnum
= 0;
1535 unsigned long def_mount_opts
;
1546 sbi
= kzalloc(sizeof(*sbi
), GFP_KERNEL
);
1549 sb
->s_fs_info
= sbi
;
1550 sbi
->s_mount_opt
= 0;
1551 sbi
->s_resuid
= EXT3_DEF_RESUID
;
1552 sbi
->s_resgid
= EXT3_DEF_RESGID
;
1553 sbi
->s_sb_block
= sb_block
;
1557 blocksize
= sb_min_blocksize(sb
, EXT3_MIN_BLOCK_SIZE
);
1559 printk(KERN_ERR
"EXT3-fs: unable to set blocksize\n");
1564 * The ext3 superblock will not be buffer aligned for other than 1kB
1565 * block sizes. We need to calculate the offset from buffer start.
1567 if (blocksize
!= EXT3_MIN_BLOCK_SIZE
) {
1568 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1569 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1571 logic_sb_block
= sb_block
;
1574 if (!(bh
= sb_bread(sb
, logic_sb_block
))) {
1575 printk (KERN_ERR
"EXT3-fs: unable to read superblock\n");
1579 * Note: s_es must be initialized as soon as possible because
1580 * some ext3 macro-instructions depend on its value
1582 es
= (struct ext3_super_block
*) (((char *)bh
->b_data
) + offset
);
1584 sb
->s_magic
= le16_to_cpu(es
->s_magic
);
1585 if (sb
->s_magic
!= EXT3_SUPER_MAGIC
)
1588 /* Set defaults before we parse the mount options */
1589 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
1590 if (def_mount_opts
& EXT3_DEFM_DEBUG
)
1591 set_opt(sbi
->s_mount_opt
, DEBUG
);
1592 if (def_mount_opts
& EXT3_DEFM_BSDGROUPS
)
1593 set_opt(sbi
->s_mount_opt
, GRPID
);
1594 if (def_mount_opts
& EXT3_DEFM_UID16
)
1595 set_opt(sbi
->s_mount_opt
, NO_UID32
);
1596 #ifdef CONFIG_EXT3_FS_XATTR
1597 if (def_mount_opts
& EXT3_DEFM_XATTR_USER
)
1598 set_opt(sbi
->s_mount_opt
, XATTR_USER
);
1600 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1601 if (def_mount_opts
& EXT3_DEFM_ACL
)
1602 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
1604 if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_DATA
)
1605 sbi
->s_mount_opt
|= EXT3_MOUNT_JOURNAL_DATA
;
1606 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_ORDERED
)
1607 sbi
->s_mount_opt
|= EXT3_MOUNT_ORDERED_DATA
;
1608 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_WBACK
)
1609 sbi
->s_mount_opt
|= EXT3_MOUNT_WRITEBACK_DATA
;
1611 if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_PANIC
)
1612 set_opt(sbi
->s_mount_opt
, ERRORS_PANIC
);
1613 else if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_CONTINUE
)
1614 set_opt(sbi
->s_mount_opt
, ERRORS_CONT
);
1616 set_opt(sbi
->s_mount_opt
, ERRORS_RO
);
1618 sbi
->s_resuid
= le16_to_cpu(es
->s_def_resuid
);
1619 sbi
->s_resgid
= le16_to_cpu(es
->s_def_resgid
);
1621 set_opt(sbi
->s_mount_opt
, RESERVATION
);
1623 if (!parse_options ((char *) data
, sb
, &journal_inum
, &journal_devnum
,
1627 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
1628 ((sbi
->s_mount_opt
& EXT3_MOUNT_POSIX_ACL
) ? MS_POSIXACL
: 0);
1630 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
&&
1631 (EXT3_HAS_COMPAT_FEATURE(sb
, ~0U) ||
1632 EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~0U) ||
1633 EXT3_HAS_INCOMPAT_FEATURE(sb
, ~0U)))
1635 "EXT3-fs warning: feature flags set on rev 0 fs, "
1636 "running e2fsck is recommended\n");
1638 * Check feature flags regardless of the revision level, since we
1639 * previously didn't change the revision level when setting the flags,
1640 * so there is a chance incompat flags are set on a rev 0 filesystem.
1642 features
= EXT3_HAS_INCOMPAT_FEATURE(sb
, ~EXT3_FEATURE_INCOMPAT_SUPP
);
1644 printk(KERN_ERR
"EXT3-fs: %s: couldn't mount because of "
1645 "unsupported optional features (%x).\n",
1646 sb
->s_id
, le32_to_cpu(features
));
1649 features
= EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~EXT3_FEATURE_RO_COMPAT_SUPP
);
1650 if (!(sb
->s_flags
& MS_RDONLY
) && features
) {
1651 printk(KERN_ERR
"EXT3-fs: %s: couldn't mount RDWR because of "
1652 "unsupported optional features (%x).\n",
1653 sb
->s_id
, le32_to_cpu(features
));
1656 blocksize
= BLOCK_SIZE
<< le32_to_cpu(es
->s_log_block_size
);
1658 if (blocksize
< EXT3_MIN_BLOCK_SIZE
||
1659 blocksize
> EXT3_MAX_BLOCK_SIZE
) {
1661 "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n",
1662 blocksize
, sb
->s_id
);
1666 hblock
= bdev_hardsect_size(sb
->s_bdev
);
1667 if (sb
->s_blocksize
!= blocksize
) {
1669 * Make sure the blocksize for the filesystem is larger
1670 * than the hardware sectorsize for the machine.
1672 if (blocksize
< hblock
) {
1673 printk(KERN_ERR
"EXT3-fs: blocksize %d too small for "
1674 "device blocksize %d.\n", blocksize
, hblock
);
1679 if (!sb_set_blocksize(sb
, blocksize
)) {
1680 printk(KERN_ERR
"EXT3-fs: bad blocksize %d.\n",
1684 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1685 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1686 bh
= sb_bread(sb
, logic_sb_block
);
1689 "EXT3-fs: Can't read superblock on 2nd try.\n");
1692 es
= (struct ext3_super_block
*)(((char *)bh
->b_data
) + offset
);
1694 if (es
->s_magic
!= cpu_to_le16(EXT3_SUPER_MAGIC
)) {
1696 "EXT3-fs: Magic mismatch, very weird !\n");
1701 sb
->s_maxbytes
= ext3_max_size(sb
->s_blocksize_bits
);
1703 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
) {
1704 sbi
->s_inode_size
= EXT3_GOOD_OLD_INODE_SIZE
;
1705 sbi
->s_first_ino
= EXT3_GOOD_OLD_FIRST_INO
;
1707 sbi
->s_inode_size
= le16_to_cpu(es
->s_inode_size
);
1708 sbi
->s_first_ino
= le32_to_cpu(es
->s_first_ino
);
1709 if ((sbi
->s_inode_size
< EXT3_GOOD_OLD_INODE_SIZE
) ||
1710 (!is_power_of_2(sbi
->s_inode_size
)) ||
1711 (sbi
->s_inode_size
> blocksize
)) {
1713 "EXT3-fs: unsupported inode size: %d\n",
1718 sbi
->s_frag_size
= EXT3_MIN_FRAG_SIZE
<<
1719 le32_to_cpu(es
->s_log_frag_size
);
1720 if (blocksize
!= sbi
->s_frag_size
) {
1722 "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n",
1723 sbi
->s_frag_size
, blocksize
);
1726 sbi
->s_frags_per_block
= 1;
1727 sbi
->s_blocks_per_group
= le32_to_cpu(es
->s_blocks_per_group
);
1728 sbi
->s_frags_per_group
= le32_to_cpu(es
->s_frags_per_group
);
1729 sbi
->s_inodes_per_group
= le32_to_cpu(es
->s_inodes_per_group
);
1730 if (EXT3_INODE_SIZE(sb
) == 0 || EXT3_INODES_PER_GROUP(sb
) == 0)
1732 sbi
->s_inodes_per_block
= blocksize
/ EXT3_INODE_SIZE(sb
);
1733 if (sbi
->s_inodes_per_block
== 0)
1735 sbi
->s_itb_per_group
= sbi
->s_inodes_per_group
/
1736 sbi
->s_inodes_per_block
;
1737 sbi
->s_desc_per_block
= blocksize
/ sizeof(struct ext3_group_desc
);
1739 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
1740 sbi
->s_addr_per_block_bits
= ilog2(EXT3_ADDR_PER_BLOCK(sb
));
1741 sbi
->s_desc_per_block_bits
= ilog2(EXT3_DESC_PER_BLOCK(sb
));
1742 for (i
=0; i
< 4; i
++)
1743 sbi
->s_hash_seed
[i
] = le32_to_cpu(es
->s_hash_seed
[i
]);
1744 sbi
->s_def_hash_version
= es
->s_def_hash_version
;
1746 if (sbi
->s_blocks_per_group
> blocksize
* 8) {
1748 "EXT3-fs: #blocks per group too big: %lu\n",
1749 sbi
->s_blocks_per_group
);
1752 if (sbi
->s_frags_per_group
> blocksize
* 8) {
1754 "EXT3-fs: #fragments per group too big: %lu\n",
1755 sbi
->s_frags_per_group
);
1758 if (sbi
->s_inodes_per_group
> blocksize
* 8) {
1760 "EXT3-fs: #inodes per group too big: %lu\n",
1761 sbi
->s_inodes_per_group
);
1765 if (le32_to_cpu(es
->s_blocks_count
) >
1766 (sector_t
)(~0ULL) >> (sb
->s_blocksize_bits
- 9)) {
1767 printk(KERN_ERR
"EXT3-fs: filesystem on %s:"
1768 " too large to mount safely\n", sb
->s_id
);
1769 if (sizeof(sector_t
) < 8)
1770 printk(KERN_WARNING
"EXT3-fs: CONFIG_LBD not "
1775 if (EXT3_BLOCKS_PER_GROUP(sb
) == 0)
1777 sbi
->s_groups_count
= ((le32_to_cpu(es
->s_blocks_count
) -
1778 le32_to_cpu(es
->s_first_data_block
) - 1)
1779 / EXT3_BLOCKS_PER_GROUP(sb
)) + 1;
1780 db_count
= (sbi
->s_groups_count
+ EXT3_DESC_PER_BLOCK(sb
) - 1) /
1781 EXT3_DESC_PER_BLOCK(sb
);
1782 sbi
->s_group_desc
= kmalloc(db_count
* sizeof (struct buffer_head
*),
1784 if (sbi
->s_group_desc
== NULL
) {
1785 printk (KERN_ERR
"EXT3-fs: not enough memory\n");
1789 bgl_lock_init(&sbi
->s_blockgroup_lock
);
1791 for (i
= 0; i
< db_count
; i
++) {
1792 block
= descriptor_loc(sb
, logic_sb_block
, i
);
1793 sbi
->s_group_desc
[i
] = sb_bread(sb
, block
);
1794 if (!sbi
->s_group_desc
[i
]) {
1795 printk (KERN_ERR
"EXT3-fs: "
1796 "can't read group descriptor %d\n", i
);
1801 if (!ext3_check_descriptors (sb
)) {
1802 printk(KERN_ERR
"EXT3-fs: group descriptors corrupted!\n");
1805 sbi
->s_gdb_count
= db_count
;
1806 get_random_bytes(&sbi
->s_next_generation
, sizeof(u32
));
1807 spin_lock_init(&sbi
->s_next_gen_lock
);
1809 err
= percpu_counter_init(&sbi
->s_freeblocks_counter
,
1810 ext3_count_free_blocks(sb
));
1812 err
= percpu_counter_init(&sbi
->s_freeinodes_counter
,
1813 ext3_count_free_inodes(sb
));
1816 err
= percpu_counter_init(&sbi
->s_dirs_counter
,
1817 ext3_count_dirs(sb
));
1820 printk(KERN_ERR
"EXT3-fs: insufficient memory\n");
1824 /* per fileystem reservation list head & lock */
1825 spin_lock_init(&sbi
->s_rsv_window_lock
);
1826 sbi
->s_rsv_window_root
= RB_ROOT
;
1827 /* Add a single, static dummy reservation to the start of the
1828 * reservation window list --- it gives us a placeholder for
1829 * append-at-start-of-list which makes the allocation logic
1830 * _much_ simpler. */
1831 sbi
->s_rsv_window_head
.rsv_start
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1832 sbi
->s_rsv_window_head
.rsv_end
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1833 sbi
->s_rsv_window_head
.rsv_alloc_hit
= 0;
1834 sbi
->s_rsv_window_head
.rsv_goal_size
= 0;
1835 ext3_rsv_window_add(sb
, &sbi
->s_rsv_window_head
);
1838 * set up enough so that it can read an inode
1840 sb
->s_op
= &ext3_sops
;
1841 sb
->s_export_op
= &ext3_export_ops
;
1842 sb
->s_xattr
= ext3_xattr_handlers
;
1844 sb
->s_qcop
= &ext3_qctl_operations
;
1845 sb
->dq_op
= &ext3_quota_operations
;
1847 INIT_LIST_HEAD(&sbi
->s_orphan
); /* unlinked but open files */
1851 needs_recovery
= (es
->s_last_orphan
!= 0 ||
1852 EXT3_HAS_INCOMPAT_FEATURE(sb
,
1853 EXT3_FEATURE_INCOMPAT_RECOVER
));
1856 * The first inode we look at is the journal inode. Don't try
1857 * root first: it may be modified in the journal!
1859 if (!test_opt(sb
, NOLOAD
) &&
1860 EXT3_HAS_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
)) {
1861 if (ext3_load_journal(sb
, es
, journal_devnum
))
1863 } else if (journal_inum
) {
1864 if (ext3_create_journal(sb
, es
, journal_inum
))
1869 "ext3: No journal on filesystem on %s\n",
1874 /* We have now updated the journal if required, so we can
1875 * validate the data journaling mode. */
1876 switch (test_opt(sb
, DATA_FLAGS
)) {
1878 /* No mode set, assume a default based on the journal
1879 capabilities: ORDERED_DATA if the journal can
1880 cope, else JOURNAL_DATA */
1881 if (journal_check_available_features
1882 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
))
1883 set_opt(sbi
->s_mount_opt
, ORDERED_DATA
);
1885 set_opt(sbi
->s_mount_opt
, JOURNAL_DATA
);
1888 case EXT3_MOUNT_ORDERED_DATA
:
1889 case EXT3_MOUNT_WRITEBACK_DATA
:
1890 if (!journal_check_available_features
1891 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
)) {
1892 printk(KERN_ERR
"EXT3-fs: Journal does not support "
1893 "requested data journaling mode\n");
1900 if (test_opt(sb
, NOBH
)) {
1901 if (!(test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_WRITEBACK_DATA
)) {
1902 printk(KERN_WARNING
"EXT3-fs: Ignoring nobh option - "
1903 "its supported only with writeback mode\n");
1904 clear_opt(sbi
->s_mount_opt
, NOBH
);
1908 * The journal_load will have done any necessary log recovery,
1909 * so we can safely mount the rest of the filesystem now.
1912 root
= ext3_iget(sb
, EXT3_ROOT_INO
);
1914 printk(KERN_ERR
"EXT3-fs: get root inode failed\n");
1915 ret
= PTR_ERR(root
);
1918 if (!S_ISDIR(root
->i_mode
) || !root
->i_blocks
|| !root
->i_size
) {
1920 printk(KERN_ERR
"EXT3-fs: corrupt root inode, run e2fsck\n");
1923 sb
->s_root
= d_alloc_root(root
);
1925 printk(KERN_ERR
"EXT3-fs: get root dentry failed\n");
1931 ext3_setup_super (sb
, es
, sb
->s_flags
& MS_RDONLY
);
1933 * akpm: core read_super() calls in here with the superblock locked.
1934 * That deadlocks, because orphan cleanup needs to lock the superblock
1935 * in numerous places. Here we just pop the lock - it's relatively
1936 * harmless, because we are now ready to accept write_super() requests,
1937 * and aviro says that's the only reason for hanging onto the
1940 EXT3_SB(sb
)->s_mount_state
|= EXT3_ORPHAN_FS
;
1941 ext3_orphan_cleanup(sb
, es
);
1942 EXT3_SB(sb
)->s_mount_state
&= ~EXT3_ORPHAN_FS
;
1944 printk (KERN_INFO
"EXT3-fs: recovery complete.\n");
1945 ext3_mark_recovery_complete(sb
, es
);
1946 printk (KERN_INFO
"EXT3-fs: mounted filesystem with %s data mode.\n",
1947 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_JOURNAL_DATA
? "journal":
1948 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_ORDERED_DATA
? "ordered":
1956 printk(KERN_ERR
"VFS: Can't find ext3 filesystem on dev %s.\n",
1961 journal_destroy(sbi
->s_journal
);
1963 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
1964 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
1965 percpu_counter_destroy(&sbi
->s_dirs_counter
);
1967 for (i
= 0; i
< db_count
; i
++)
1968 brelse(sbi
->s_group_desc
[i
]);
1969 kfree(sbi
->s_group_desc
);
1972 for (i
= 0; i
< MAXQUOTAS
; i
++)
1973 kfree(sbi
->s_qf_names
[i
]);
1975 ext3_blkdev_remove(sbi
);
1978 sb
->s_fs_info
= NULL
;
1985 * Setup any per-fs journal parameters now. We'll do this both on
1986 * initial mount, once the journal has been initialised but before we've
1987 * done any recovery; and again on any subsequent remount.
1989 static void ext3_init_journal_params(struct super_block
*sb
, journal_t
*journal
)
1991 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1993 if (sbi
->s_commit_interval
)
1994 journal
->j_commit_interval
= sbi
->s_commit_interval
;
1995 /* We could also set up an ext3-specific default for the commit
1996 * interval here, but for now we'll just fall back to the jbd
1999 spin_lock(&journal
->j_state_lock
);
2000 if (test_opt(sb
, BARRIER
))
2001 journal
->j_flags
|= JFS_BARRIER
;
2003 journal
->j_flags
&= ~JFS_BARRIER
;
2004 if (test_opt(sb
, DATA_ERR_ABORT
))
2005 journal
->j_flags
|= JFS_ABORT_ON_SYNCDATA_ERR
;
2007 journal
->j_flags
&= ~JFS_ABORT_ON_SYNCDATA_ERR
;
2008 spin_unlock(&journal
->j_state_lock
);
2011 static journal_t
*ext3_get_journal(struct super_block
*sb
,
2012 unsigned int journal_inum
)
2014 struct inode
*journal_inode
;
2017 /* First, test for the existence of a valid inode on disk. Bad
2018 * things happen if we iget() an unused inode, as the subsequent
2019 * iput() will try to delete it. */
2021 journal_inode
= ext3_iget(sb
, journal_inum
);
2022 if (IS_ERR(journal_inode
)) {
2023 printk(KERN_ERR
"EXT3-fs: no journal found.\n");
2026 if (!journal_inode
->i_nlink
) {
2027 make_bad_inode(journal_inode
);
2028 iput(journal_inode
);
2029 printk(KERN_ERR
"EXT3-fs: journal inode is deleted.\n");
2033 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2034 journal_inode
, journal_inode
->i_size
);
2035 if (!S_ISREG(journal_inode
->i_mode
)) {
2036 printk(KERN_ERR
"EXT3-fs: invalid journal inode.\n");
2037 iput(journal_inode
);
2041 journal
= journal_init_inode(journal_inode
);
2043 printk(KERN_ERR
"EXT3-fs: Could not load journal inode\n");
2044 iput(journal_inode
);
2047 journal
->j_private
= sb
;
2048 ext3_init_journal_params(sb
, journal
);
2052 static journal_t
*ext3_get_dev_journal(struct super_block
*sb
,
2055 struct buffer_head
* bh
;
2059 int hblock
, blocksize
;
2060 ext3_fsblk_t sb_block
;
2061 unsigned long offset
;
2062 struct ext3_super_block
* es
;
2063 struct block_device
*bdev
;
2065 bdev
= ext3_blkdev_get(j_dev
);
2069 if (bd_claim(bdev
, sb
)) {
2071 "EXT3: failed to claim external journal device.\n");
2072 blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
);
2076 blocksize
= sb
->s_blocksize
;
2077 hblock
= bdev_hardsect_size(bdev
);
2078 if (blocksize
< hblock
) {
2080 "EXT3-fs: blocksize too small for journal device.\n");
2084 sb_block
= EXT3_MIN_BLOCK_SIZE
/ blocksize
;
2085 offset
= EXT3_MIN_BLOCK_SIZE
% blocksize
;
2086 set_blocksize(bdev
, blocksize
);
2087 if (!(bh
= __bread(bdev
, sb_block
, blocksize
))) {
2088 printk(KERN_ERR
"EXT3-fs: couldn't read superblock of "
2089 "external journal\n");
2093 es
= (struct ext3_super_block
*) (((char *)bh
->b_data
) + offset
);
2094 if ((le16_to_cpu(es
->s_magic
) != EXT3_SUPER_MAGIC
) ||
2095 !(le32_to_cpu(es
->s_feature_incompat
) &
2096 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV
)) {
2097 printk(KERN_ERR
"EXT3-fs: external journal has "
2098 "bad superblock\n");
2103 if (memcmp(EXT3_SB(sb
)->s_es
->s_journal_uuid
, es
->s_uuid
, 16)) {
2104 printk(KERN_ERR
"EXT3-fs: journal UUID does not match\n");
2109 len
= le32_to_cpu(es
->s_blocks_count
);
2110 start
= sb_block
+ 1;
2111 brelse(bh
); /* we're done with the superblock */
2113 journal
= journal_init_dev(bdev
, sb
->s_bdev
,
2114 start
, len
, blocksize
);
2116 printk(KERN_ERR
"EXT3-fs: failed to create device journal\n");
2119 journal
->j_private
= sb
;
2120 ll_rw_block(READ
, 1, &journal
->j_sb_buffer
);
2121 wait_on_buffer(journal
->j_sb_buffer
);
2122 if (!buffer_uptodate(journal
->j_sb_buffer
)) {
2123 printk(KERN_ERR
"EXT3-fs: I/O error on journal device\n");
2126 if (be32_to_cpu(journal
->j_superblock
->s_nr_users
) != 1) {
2127 printk(KERN_ERR
"EXT3-fs: External journal has more than one "
2128 "user (unsupported) - %d\n",
2129 be32_to_cpu(journal
->j_superblock
->s_nr_users
));
2132 EXT3_SB(sb
)->journal_bdev
= bdev
;
2133 ext3_init_journal_params(sb
, journal
);
2136 journal_destroy(journal
);
2138 ext3_blkdev_put(bdev
);
2142 static int ext3_load_journal(struct super_block
*sb
,
2143 struct ext3_super_block
*es
,
2144 unsigned long journal_devnum
)
2147 unsigned int journal_inum
= le32_to_cpu(es
->s_journal_inum
);
2150 int really_read_only
;
2152 if (journal_devnum
&&
2153 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2154 printk(KERN_INFO
"EXT3-fs: external journal device major/minor "
2155 "numbers have changed\n");
2156 journal_dev
= new_decode_dev(journal_devnum
);
2158 journal_dev
= new_decode_dev(le32_to_cpu(es
->s_journal_dev
));
2160 really_read_only
= bdev_read_only(sb
->s_bdev
);
2163 * Are we loading a blank journal or performing recovery after a
2164 * crash? For recovery, we need to check in advance whether we
2165 * can get read-write access to the device.
2168 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
)) {
2169 if (sb
->s_flags
& MS_RDONLY
) {
2170 printk(KERN_INFO
"EXT3-fs: INFO: recovery "
2171 "required on readonly filesystem.\n");
2172 if (really_read_only
) {
2173 printk(KERN_ERR
"EXT3-fs: write access "
2174 "unavailable, cannot proceed.\n");
2177 printk (KERN_INFO
"EXT3-fs: write access will "
2178 "be enabled during recovery.\n");
2182 if (journal_inum
&& journal_dev
) {
2183 printk(KERN_ERR
"EXT3-fs: filesystem has both journal "
2184 "and inode journals!\n");
2189 if (!(journal
= ext3_get_journal(sb
, journal_inum
)))
2192 if (!(journal
= ext3_get_dev_journal(sb
, journal_dev
)))
2196 if (!really_read_only
&& test_opt(sb
, UPDATE_JOURNAL
)) {
2197 err
= journal_update_format(journal
);
2199 printk(KERN_ERR
"EXT3-fs: error updating journal.\n");
2200 journal_destroy(journal
);
2205 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
))
2206 err
= journal_wipe(journal
, !really_read_only
);
2208 err
= journal_load(journal
);
2211 printk(KERN_ERR
"EXT3-fs: error loading journal.\n");
2212 journal_destroy(journal
);
2216 EXT3_SB(sb
)->s_journal
= journal
;
2217 ext3_clear_journal_err(sb
, es
);
2219 if (journal_devnum
&&
2220 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2221 es
->s_journal_dev
= cpu_to_le32(journal_devnum
);
2224 /* Make sure we flush the recovery flag to disk. */
2225 ext3_commit_super(sb
, es
, 1);
2231 static int ext3_create_journal(struct super_block
* sb
,
2232 struct ext3_super_block
* es
,
2233 unsigned int journal_inum
)
2238 if (sb
->s_flags
& MS_RDONLY
) {
2239 printk(KERN_ERR
"EXT3-fs: readonly filesystem when trying to "
2240 "create journal.\n");
2244 journal
= ext3_get_journal(sb
, journal_inum
);
2248 printk(KERN_INFO
"EXT3-fs: creating new journal on inode %u\n",
2251 err
= journal_create(journal
);
2253 printk(KERN_ERR
"EXT3-fs: error creating journal.\n");
2254 journal_destroy(journal
);
2258 EXT3_SB(sb
)->s_journal
= journal
;
2260 ext3_update_dynamic_rev(sb
);
2261 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2262 EXT3_SET_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
);
2264 es
->s_journal_inum
= cpu_to_le32(journal_inum
);
2267 /* Make sure we flush the recovery flag to disk. */
2268 ext3_commit_super(sb
, es
, 1);
2273 static void ext3_commit_super (struct super_block
* sb
,
2274 struct ext3_super_block
* es
,
2277 struct buffer_head
*sbh
= EXT3_SB(sb
)->s_sbh
;
2281 es
->s_wtime
= cpu_to_le32(get_seconds());
2282 es
->s_free_blocks_count
= cpu_to_le32(ext3_count_free_blocks(sb
));
2283 es
->s_free_inodes_count
= cpu_to_le32(ext3_count_free_inodes(sb
));
2284 BUFFER_TRACE(sbh
, "marking dirty");
2285 mark_buffer_dirty(sbh
);
2287 sync_dirty_buffer(sbh
);
2292 * Have we just finished recovery? If so, and if we are mounting (or
2293 * remounting) the filesystem readonly, then we will end up with a
2294 * consistent fs on disk. Record that fact.
2296 static void ext3_mark_recovery_complete(struct super_block
* sb
,
2297 struct ext3_super_block
* es
)
2299 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
2301 journal_lock_updates(journal
);
2302 if (journal_flush(journal
) < 0)
2306 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
) &&
2307 sb
->s_flags
& MS_RDONLY
) {
2308 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2310 ext3_commit_super(sb
, es
, 1);
2315 journal_unlock_updates(journal
);
2319 * If we are mounting (or read-write remounting) a filesystem whose journal
2320 * has recorded an error from a previous lifetime, move that error to the
2321 * main filesystem now.
2323 static void ext3_clear_journal_err(struct super_block
* sb
,
2324 struct ext3_super_block
* es
)
2330 journal
= EXT3_SB(sb
)->s_journal
;
2333 * Now check for any error status which may have been recorded in the
2334 * journal by a prior ext3_error() or ext3_abort()
2337 j_errno
= journal_errno(journal
);
2341 errstr
= ext3_decode_error(sb
, j_errno
, nbuf
);
2342 ext3_warning(sb
, __func__
, "Filesystem error recorded "
2343 "from previous mount: %s", errstr
);
2344 ext3_warning(sb
, __func__
, "Marking fs in need of "
2345 "filesystem check.");
2347 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
2348 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
2349 ext3_commit_super (sb
, es
, 1);
2351 journal_clear_err(journal
);
2356 * Force the running and committing transactions to commit,
2357 * and wait on the commit.
2359 int ext3_force_commit(struct super_block
*sb
)
2364 if (sb
->s_flags
& MS_RDONLY
)
2367 journal
= EXT3_SB(sb
)->s_journal
;
2369 ret
= ext3_journal_force_commit(journal
);
2374 * Ext3 always journals updates to the superblock itself, so we don't
2375 * have to propagate any other updates to the superblock on disk at this
2376 * point. (We can probably nuke this function altogether, and remove
2377 * any mention to sb->s_dirt in all of fs/ext3; eventual cleanup...)
2379 static void ext3_write_super (struct super_block
* sb
)
2381 if (mutex_trylock(&sb
->s_lock
) != 0)
2386 static int ext3_sync_fs(struct super_block
*sb
, int wait
)
2390 ext3_force_commit(sb
);
2392 journal_start_commit(EXT3_SB(sb
)->s_journal
, NULL
);
2398 * LVM calls this function before a (read-only) snapshot is created. This
2399 * gives us a chance to flush the journal completely and mark the fs clean.
2401 static void ext3_write_super_lockfs(struct super_block
*sb
)
2405 if (!(sb
->s_flags
& MS_RDONLY
)) {
2406 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
2408 /* Now we set up the journal barrier. */
2409 journal_lock_updates(journal
);
2412 * We don't want to clear needs_recovery flag when we failed
2413 * to flush the journal.
2415 if (journal_flush(journal
) < 0)
2418 /* Journal blocked and flushed, clear needs_recovery flag. */
2419 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2420 ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2425 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2426 * flag here, even though the filesystem is not technically dirty yet.
2428 static void ext3_unlockfs(struct super_block
*sb
)
2430 if (!(sb
->s_flags
& MS_RDONLY
)) {
2432 /* Reser the needs_recovery flag before the fs is unlocked. */
2433 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2434 ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2436 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2440 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
)
2442 struct ext3_super_block
* es
;
2443 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2444 ext3_fsblk_t n_blocks_count
= 0;
2445 unsigned long old_sb_flags
;
2446 struct ext3_mount_options old_opts
;
2452 /* Store the original options */
2453 old_sb_flags
= sb
->s_flags
;
2454 old_opts
.s_mount_opt
= sbi
->s_mount_opt
;
2455 old_opts
.s_resuid
= sbi
->s_resuid
;
2456 old_opts
.s_resgid
= sbi
->s_resgid
;
2457 old_opts
.s_commit_interval
= sbi
->s_commit_interval
;
2459 old_opts
.s_jquota_fmt
= sbi
->s_jquota_fmt
;
2460 for (i
= 0; i
< MAXQUOTAS
; i
++)
2461 old_opts
.s_qf_names
[i
] = sbi
->s_qf_names
[i
];
2465 * Allow the "check" option to be passed as a remount option.
2467 if (!parse_options(data
, sb
, NULL
, NULL
, &n_blocks_count
, 1)) {
2472 if (sbi
->s_mount_opt
& EXT3_MOUNT_ABORT
)
2473 ext3_abort(sb
, __func__
, "Abort forced by user");
2475 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
2476 ((sbi
->s_mount_opt
& EXT3_MOUNT_POSIX_ACL
) ? MS_POSIXACL
: 0);
2480 ext3_init_journal_params(sb
, sbi
->s_journal
);
2482 if ((*flags
& MS_RDONLY
) != (sb
->s_flags
& MS_RDONLY
) ||
2483 n_blocks_count
> le32_to_cpu(es
->s_blocks_count
)) {
2484 if (sbi
->s_mount_opt
& EXT3_MOUNT_ABORT
) {
2489 if (*flags
& MS_RDONLY
) {
2491 * First of all, the unconditional stuff we have to do
2492 * to disable replay of the journal when we next remount
2494 sb
->s_flags
|= MS_RDONLY
;
2497 * OK, test if we are remounting a valid rw partition
2498 * readonly, and if so set the rdonly flag and then
2499 * mark the partition as valid again.
2501 if (!(es
->s_state
& cpu_to_le16(EXT3_VALID_FS
)) &&
2502 (sbi
->s_mount_state
& EXT3_VALID_FS
))
2503 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
2506 * We have to unlock super so that we can wait for
2510 ext3_mark_recovery_complete(sb
, es
);
2514 if ((ret
= EXT3_HAS_RO_COMPAT_FEATURE(sb
,
2515 ~EXT3_FEATURE_RO_COMPAT_SUPP
))) {
2516 printk(KERN_WARNING
"EXT3-fs: %s: couldn't "
2517 "remount RDWR because of unsupported "
2518 "optional features (%x).\n",
2519 sb
->s_id
, le32_to_cpu(ret
));
2525 * If we have an unprocessed orphan list hanging
2526 * around from a previously readonly bdev mount,
2527 * require a full umount/remount for now.
2529 if (es
->s_last_orphan
) {
2530 printk(KERN_WARNING
"EXT3-fs: %s: couldn't "
2531 "remount RDWR because of unprocessed "
2532 "orphan inode list. Please "
2533 "umount/remount instead.\n",
2540 * Mounting a RDONLY partition read-write, so reread
2541 * and store the current valid flag. (It may have
2542 * been changed by e2fsck since we originally mounted
2545 ext3_clear_journal_err(sb
, es
);
2546 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
2547 if ((err
= ext3_group_extend(sb
, es
, n_blocks_count
)))
2549 if (!ext3_setup_super (sb
, es
, 0))
2550 sb
->s_flags
&= ~MS_RDONLY
;
2554 /* Release old quota file names */
2555 for (i
= 0; i
< MAXQUOTAS
; i
++)
2556 if (old_opts
.s_qf_names
[i
] &&
2557 old_opts
.s_qf_names
[i
] != sbi
->s_qf_names
[i
])
2558 kfree(old_opts
.s_qf_names
[i
]);
2562 sb
->s_flags
= old_sb_flags
;
2563 sbi
->s_mount_opt
= old_opts
.s_mount_opt
;
2564 sbi
->s_resuid
= old_opts
.s_resuid
;
2565 sbi
->s_resgid
= old_opts
.s_resgid
;
2566 sbi
->s_commit_interval
= old_opts
.s_commit_interval
;
2568 sbi
->s_jquota_fmt
= old_opts
.s_jquota_fmt
;
2569 for (i
= 0; i
< MAXQUOTAS
; i
++) {
2570 if (sbi
->s_qf_names
[i
] &&
2571 old_opts
.s_qf_names
[i
] != sbi
->s_qf_names
[i
])
2572 kfree(sbi
->s_qf_names
[i
]);
2573 sbi
->s_qf_names
[i
] = old_opts
.s_qf_names
[i
];
2579 static int ext3_statfs (struct dentry
* dentry
, struct kstatfs
* buf
)
2581 struct super_block
*sb
= dentry
->d_sb
;
2582 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2583 struct ext3_super_block
*es
= sbi
->s_es
;
2586 if (test_opt(sb
, MINIX_DF
)) {
2587 sbi
->s_overhead_last
= 0;
2588 } else if (sbi
->s_blocks_last
!= le32_to_cpu(es
->s_blocks_count
)) {
2589 unsigned long ngroups
= sbi
->s_groups_count
, i
;
2590 ext3_fsblk_t overhead
= 0;
2594 * Compute the overhead (FS structures). This is constant
2595 * for a given filesystem unless the number of block groups
2596 * changes so we cache the previous value until it does.
2600 * All of the blocks before first_data_block are
2603 overhead
= le32_to_cpu(es
->s_first_data_block
);
2606 * Add the overhead attributed to the superblock and
2607 * block group descriptors. If the sparse superblocks
2608 * feature is turned on, then not all groups have this.
2610 for (i
= 0; i
< ngroups
; i
++) {
2611 overhead
+= ext3_bg_has_super(sb
, i
) +
2612 ext3_bg_num_gdb(sb
, i
);
2617 * Every block group has an inode bitmap, a block
2618 * bitmap, and an inode table.
2620 overhead
+= ngroups
* (2 + sbi
->s_itb_per_group
);
2621 sbi
->s_overhead_last
= overhead
;
2623 sbi
->s_blocks_last
= le32_to_cpu(es
->s_blocks_count
);
2626 buf
->f_type
= EXT3_SUPER_MAGIC
;
2627 buf
->f_bsize
= sb
->s_blocksize
;
2628 buf
->f_blocks
= le32_to_cpu(es
->s_blocks_count
) - sbi
->s_overhead_last
;
2629 buf
->f_bfree
= percpu_counter_sum_positive(&sbi
->s_freeblocks_counter
);
2630 es
->s_free_blocks_count
= cpu_to_le32(buf
->f_bfree
);
2631 buf
->f_bavail
= buf
->f_bfree
- le32_to_cpu(es
->s_r_blocks_count
);
2632 if (buf
->f_bfree
< le32_to_cpu(es
->s_r_blocks_count
))
2634 buf
->f_files
= le32_to_cpu(es
->s_inodes_count
);
2635 buf
->f_ffree
= percpu_counter_sum_positive(&sbi
->s_freeinodes_counter
);
2636 es
->s_free_inodes_count
= cpu_to_le32(buf
->f_ffree
);
2637 buf
->f_namelen
= EXT3_NAME_LEN
;
2638 fsid
= le64_to_cpup((void *)es
->s_uuid
) ^
2639 le64_to_cpup((void *)es
->s_uuid
+ sizeof(u64
));
2640 buf
->f_fsid
.val
[0] = fsid
& 0xFFFFFFFFUL
;
2641 buf
->f_fsid
.val
[1] = (fsid
>> 32) & 0xFFFFFFFFUL
;
2645 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2646 * is locked for write. Otherwise the are possible deadlocks:
2647 * Process 1 Process 2
2648 * ext3_create() quota_sync()
2649 * journal_start() write_dquot()
2650 * DQUOT_INIT() down(dqio_mutex)
2651 * down(dqio_mutex) journal_start()
2657 static inline struct inode
*dquot_to_inode(struct dquot
*dquot
)
2659 return sb_dqopt(dquot
->dq_sb
)->files
[dquot
->dq_type
];
2662 static int ext3_dquot_initialize(struct inode
*inode
, int type
)
2667 /* We may create quota structure so we need to reserve enough blocks */
2668 handle
= ext3_journal_start(inode
, 2*EXT3_QUOTA_INIT_BLOCKS(inode
->i_sb
));
2670 return PTR_ERR(handle
);
2671 ret
= dquot_initialize(inode
, type
);
2672 err
= ext3_journal_stop(handle
);
2678 static int ext3_dquot_drop(struct inode
*inode
)
2683 /* We may delete quota structure so we need to reserve enough blocks */
2684 handle
= ext3_journal_start(inode
, 2*EXT3_QUOTA_DEL_BLOCKS(inode
->i_sb
));
2685 if (IS_ERR(handle
)) {
2687 * We call dquot_drop() anyway to at least release references
2688 * to quota structures so that umount does not hang.
2691 return PTR_ERR(handle
);
2693 ret
= dquot_drop(inode
);
2694 err
= ext3_journal_stop(handle
);
2700 static int ext3_write_dquot(struct dquot
*dquot
)
2704 struct inode
*inode
;
2706 inode
= dquot_to_inode(dquot
);
2707 handle
= ext3_journal_start(inode
,
2708 EXT3_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
2710 return PTR_ERR(handle
);
2711 ret
= dquot_commit(dquot
);
2712 err
= ext3_journal_stop(handle
);
2718 static int ext3_acquire_dquot(struct dquot
*dquot
)
2723 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2724 EXT3_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
2726 return PTR_ERR(handle
);
2727 ret
= dquot_acquire(dquot
);
2728 err
= ext3_journal_stop(handle
);
2734 static int ext3_release_dquot(struct dquot
*dquot
)
2739 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2740 EXT3_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
2741 if (IS_ERR(handle
)) {
2742 /* Release dquot anyway to avoid endless cycle in dqput() */
2743 dquot_release(dquot
);
2744 return PTR_ERR(handle
);
2746 ret
= dquot_release(dquot
);
2747 err
= ext3_journal_stop(handle
);
2753 static int ext3_mark_dquot_dirty(struct dquot
*dquot
)
2755 /* Are we journaling quotas? */
2756 if (EXT3_SB(dquot
->dq_sb
)->s_qf_names
[USRQUOTA
] ||
2757 EXT3_SB(dquot
->dq_sb
)->s_qf_names
[GRPQUOTA
]) {
2758 dquot_mark_dquot_dirty(dquot
);
2759 return ext3_write_dquot(dquot
);
2761 return dquot_mark_dquot_dirty(dquot
);
2765 static int ext3_write_info(struct super_block
*sb
, int type
)
2770 /* Data block + inode block */
2771 handle
= ext3_journal_start(sb
->s_root
->d_inode
, 2);
2773 return PTR_ERR(handle
);
2774 ret
= dquot_commit_info(sb
, type
);
2775 err
= ext3_journal_stop(handle
);
2782 * Turn on quotas during mount time - we need to find
2783 * the quota file and such...
2785 static int ext3_quota_on_mount(struct super_block
*sb
, int type
)
2787 return vfs_quota_on_mount(sb
, EXT3_SB(sb
)->s_qf_names
[type
],
2788 EXT3_SB(sb
)->s_jquota_fmt
, type
);
2792 * Standard function to be called on quota_on
2794 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
2795 char *name
, int remount
)
2800 if (!test_opt(sb
, QUOTA
))
2802 /* When remounting, no checks are needed and in fact, name is NULL */
2804 return vfs_quota_on(sb
, type
, format_id
, name
, remount
);
2806 err
= kern_path(name
, LOOKUP_FOLLOW
, &path
);
2810 /* Quotafile not on the same filesystem? */
2811 if (path
.mnt
->mnt_sb
!= sb
) {
2815 /* Journaling quota? */
2816 if (EXT3_SB(sb
)->s_qf_names
[type
]) {
2817 /* Quotafile not of fs root? */
2818 if (path
.dentry
->d_parent
!= sb
->s_root
)
2820 "EXT3-fs: Quota file not on filesystem root. "
2821 "Journaled quota will not work.\n");
2825 * When we journal data on quota file, we have to flush journal to see
2826 * all updates to the file when we bypass pagecache...
2828 if (ext3_should_journal_data(path
.dentry
->d_inode
)) {
2830 * We don't need to lock updates but journal_flush() could
2831 * otherwise be livelocked...
2833 journal_lock_updates(EXT3_SB(sb
)->s_journal
);
2834 err
= journal_flush(EXT3_SB(sb
)->s_journal
);
2835 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2842 err
= vfs_quota_on_path(sb
, type
, format_id
, &path
);
2847 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2848 * acquiring the locks... As quota files are never truncated and quota code
2849 * itself serializes the operations (and noone else should touch the files)
2850 * we don't have to be afraid of races */
2851 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
2852 size_t len
, loff_t off
)
2854 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2855 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2857 int offset
= off
& (sb
->s_blocksize
- 1);
2860 struct buffer_head
*bh
;
2861 loff_t i_size
= i_size_read(inode
);
2865 if (off
+len
> i_size
)
2868 while (toread
> 0) {
2869 tocopy
= sb
->s_blocksize
- offset
< toread
?
2870 sb
->s_blocksize
- offset
: toread
;
2871 bh
= ext3_bread(NULL
, inode
, blk
, 0, &err
);
2874 if (!bh
) /* A hole? */
2875 memset(data
, 0, tocopy
);
2877 memcpy(data
, bh
->b_data
+offset
, tocopy
);
2887 /* Write to quotafile (we know the transaction is already started and has
2888 * enough credits) */
2889 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
2890 const char *data
, size_t len
, loff_t off
)
2892 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2893 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2895 int offset
= off
& (sb
->s_blocksize
- 1);
2897 int journal_quota
= EXT3_SB(sb
)->s_qf_names
[type
] != NULL
;
2898 size_t towrite
= len
;
2899 struct buffer_head
*bh
;
2900 handle_t
*handle
= journal_current_handle();
2903 printk(KERN_WARNING
"EXT3-fs: Quota write (off=%Lu, len=%Lu)"
2904 " cancelled because transaction is not started.\n",
2905 (unsigned long long)off
, (unsigned long long)len
);
2908 mutex_lock_nested(&inode
->i_mutex
, I_MUTEX_QUOTA
);
2909 while (towrite
> 0) {
2910 tocopy
= sb
->s_blocksize
- offset
< towrite
?
2911 sb
->s_blocksize
- offset
: towrite
;
2912 bh
= ext3_bread(handle
, inode
, blk
, 1, &err
);
2915 if (journal_quota
) {
2916 err
= ext3_journal_get_write_access(handle
, bh
);
2923 memcpy(bh
->b_data
+offset
, data
, tocopy
);
2924 flush_dcache_page(bh
->b_page
);
2927 err
= ext3_journal_dirty_metadata(handle
, bh
);
2929 /* Always do at least ordered writes for quotas */
2930 err
= ext3_journal_dirty_data(handle
, bh
);
2931 mark_buffer_dirty(bh
);
2942 if (len
== towrite
) {
2943 mutex_unlock(&inode
->i_mutex
);
2946 if (inode
->i_size
< off
+len
-towrite
) {
2947 i_size_write(inode
, off
+len
-towrite
);
2948 EXT3_I(inode
)->i_disksize
= inode
->i_size
;
2951 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
2952 ext3_mark_inode_dirty(handle
, inode
);
2953 mutex_unlock(&inode
->i_mutex
);
2954 return len
- towrite
;
2959 static int ext3_get_sb(struct file_system_type
*fs_type
,
2960 int flags
, const char *dev_name
, void *data
, struct vfsmount
*mnt
)
2962 return get_sb_bdev(fs_type
, flags
, dev_name
, data
, ext3_fill_super
, mnt
);
2965 static struct file_system_type ext3_fs_type
= {
2966 .owner
= THIS_MODULE
,
2968 .get_sb
= ext3_get_sb
,
2969 .kill_sb
= kill_block_super
,
2970 .fs_flags
= FS_REQUIRES_DEV
,
2973 static int __init
init_ext3_fs(void)
2975 int err
= init_ext3_xattr();
2978 err
= init_inodecache();
2981 err
= register_filesystem(&ext3_fs_type
);
2986 destroy_inodecache();
2992 static void __exit
exit_ext3_fs(void)
2994 unregister_filesystem(&ext3_fs_type
);
2995 destroy_inodecache();
2999 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3000 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3001 MODULE_LICENSE("GPL");
3002 module_init(init_ext3_fs
)
3003 module_exit(exit_ext3_fs
)